A wheel hub runout measuring device and wheel hub measuring equipment

Abstract

A hub runout measuring device and hub measuring equipment, comprising a moving mechanism and a detection mechanism, wherein the detection mechanism is arranged on the moving mechanism, and the moving mechanism drives the detection mechanism to move to a detection position; the detection mechanism comprises: a first mounting member, which is mounted on the moving mechanism; a second mounting member, which is mounted on the first mounting member and is slidably connected to the first mounting member along the radial direction of the hub; a first sensor, which is fixed on the first mounting member, abuts against the second mounting member, and detects the displacement of the second mounting member; a detection arm, which is hinged to the second mounting member and rotates along the axial direction of the hub; a second sensor, which is arranged on the second mounting member, abuts against the detection arm, and detects the rotation amplitude of the detection arm; a measuring head, which is arranged on the detection arm and is used to abut against the hub.

Description

Technical Field

[0001] The present application relates to the technical field of wheel hub detection, and in particular to a wheel hub runout measuring device and a wheel hub measuring equipment. Background Art

[0002] As auto parts continue to go abroad, various wheel manufacturers have put forward strict testing requirements for the axial and radial runout indicators of the wheel, making the wheel runout measurement technology extremely important. The wheel is an extremely important component in the movement of a locomotive. The runout of the wheel is a very important performance indicator, which affects the stability and safety of the vehicle's operation. The radial runout and axial runout of the car's wheel will produce unbalanced inertia, which will exert periodic impacts on the front and rear axles of the vehicle, causing the wheel to jump up and down and sway left and right, and then transmit it to the steering wheel through the steering mechanism to make it shake, thereby having a serious impact on the dynamic and static characteristics of the vehicle. The higher the speed, the more obvious this phenomenon is. In the prior art, there is a wheel runout measurement device, which uses two sensors to directly contact the wheel to detect the radial runout and axial runout of the wheel respectively. However, this structure has problems such as easy interference between sensors, limited configuration structure, and easy damage to sensors. For example, CN105758451A discloses a wheel hub runout measuring device: a roller mounted on a transmission rod is in direct contact with the wheel hub, and the wheel hub runout causes the axial and radial translations of the transmission rod, and the axial and radial translations of the transmission rod are detected by a sensor to measure the wheel hub runout. This structure has the problem of a large size of the detection device. Summary of the invention

[0003] The present application provides a miniaturized wheel hub runout measuring device and a wheel hub measuring equipment.

[0004] To achieve the above-mentioned purpose, the first aspect of the present application provides a wheel hub runout measuring device, including a moving mechanism and a detection mechanism, wherein the detection mechanism is arranged on the moving mechanism, and the moving mechanism drives the detection mechanism to move to a detection position to detect the wheel hub at the detection position; the detection mechanism includes: a first mounting member, which is mounted on the moving mechanism and can be driven to move by the moving mechanism; a second mounting member, which is mounted on the first mounting member and is slidably connected to the first mounting member along the radial direction of the wheel hub; a first sensor, which is fixed to the first mounting member The detection arm is on the second mounting part, abutting with the second mounting part to detect the displacement of the second mounting part; a detection arm, the detection arm extends along the radial direction of the wheel hub, is hinged with the second mounting part at its middle position, and rotates along the axial direction of the wheel hub with an axis perpendicular to the axial direction of the wheel hub as the center; a second sensor, the second sensor is arranged on the second mounting part, located at a position corresponding to the end of the detection arm away from the wheel hub, abutting with the detection arm, and detecting the rotation amplitude of the detection arm; a measuring head, the measuring head is arranged on the detection arm, located at a position of the end of the detection arm facing the wheel hub, and is used to abut against the wheel hub.

[0005] From the above, the displacement mechanism moves the detection mechanism to the detection position so that the measuring head abuts against the wheel hub. When the runout of the wheel hub is measured, the second mounting member is connected to the first mounting member in a radial sliding manner along the wheel hub. When the radial dimension of the wheel hub changes, the second mounting member can be pushed to slide on the first mounting member by the measuring head, and the displacement of the second mounting member is detected by the first sensor, so that the runout of the wheel hub in the radial direction can be detected. The detection arm is hinged with the second mounting member. When the axial dimension of the wheel hub changes, the detection arm can be pushed to rotate on the second mounting member by the measuring head, and the rotation amount of the detection arm can be detected by the second sensor, so that the runout of the wheel hub in the axial direction can be detected. In this way, the runout of the wheel hub in both the radial and axial directions can be detected. In addition, by setting the detection arm on the second mounting member and setting the measuring head on the detection arm, the runout of the wheel hub in the radial and axial directions can be detected at the same time after the measuring head abuts against the wheel hub. In this way, the structure of the detection mechanism can be simplified and the structure of the detection mechanism can be made more compact.

[0006] At the same time, since the requirements for the stability and accuracy of the detection are very high when measuring the runout of the wheel hub, when using the sliding connection method, the slider and the slide rail need to have a sufficiently large matching size, that is, the slider and the slide rail need to be set to a larger size to ensure the stability of the sliding and improve the accuracy of the detection. Therefore, the size of the sliding connection structure between the first mounting member and the second mounting member is relatively large. If the detection in the radial direction of the wheel hub is also set to a sliding connection, even if the detection arm is slidingly connected to the second mounting member, the size of the sliding connection structure between the detection arm and the second mounting member also needs to be set to a larger structure to meet the requirements of the stability and accuracy of the sliding. In the present application, by making the detection arm hinged to the second mounting member at its middle position, the sliding connection structure can be replaced, so that there is no need to set a large-sized sliding matching structure between the detection arm and the second mounting member, so that the size of the connection structure between the detection arm and the second mounting member can be reduced, thereby making the structure more compact.

[0007] In addition, in the present application, radial runout is measured by sliding the second mounting member left and right on the first mounting member (radial runout), and axial runout is measured by rotating the detection arm up and down on the second mounting member (axial runout). Thus, axial runout and radial runout can be detected simultaneously. If a structure opposite to the above structure is adopted (i.e., radial runout is detected by rotating left and right, and axial runout is detected by sliding up and down) for axial and radial runout detection, the sliding direction will change with the change of the rotation direction, thereby affecting the accuracy of the runout measurement. At the same time, when the opposite structure is adopted, since the detection arm needs to slide up and down on the second mounting member, the extension direction of the detection arm is different from its sliding direction, so that the detection arm needs to be provided with a turning structure, which will affect the compactness of the structure. That is, by using the above structure in the present application, not only the stability of the action during runout detection can be improved, but also the compactness of the structure can be improved. As a possible implementation of the first aspect, the detection mechanism is provided with a plurality of measuring heads of the plurality of detection mechanisms abutting against the wheel hub at different positions.

[0008] As described above, by setting up multiple detection mechanisms, the runout amounts at different positions of the wheel hub can be detected, thereby improving the detection efficiency and shortening the detection time.

[0009] As a possible implementation of the first aspect, the detection mechanism also includes: an elastic member, which is arranged on the first mounting member, pushing the second mounting member away from the first sensor, and / or the elastic member is arranged on the second mounting member, pushing the detection arm away from the second sensor.

[0010] As described above, by providing the elastic member, the impact force on the first sensor and the second sensor can be reduced, so as to increase the service life of the first sensor and the second sensor.

[0011] As a possible implementation of the first aspect, the detection mechanism also includes: a probe pin, which is arranged on the second mounting member, located at a position corresponding to the first sensor and abutting against the first sensor, and / or, the probe pin is arranged on the detection arm, located at a position corresponding to the second sensor and abutting against the second sensor.

[0012] As described above, by setting the probe pin, the second mounting member can be abutted against the first sensor through the probe pin, and the detection arm can be abutted against the second sensor through the probe pin. Therefore, when the probe pin affects the detection result due to wear during the runout detection, the probe pin can be replaced, thereby improving the detection accuracy of the runout detection.

[0013] As a possible implementation manner of the first aspect, the probe pin is made of cemented carbide.

[0014] From the above, by using a probe pin that is harder than the second mounting part and the detection arm, compared with the method of directly abutting the first sensor and the second sensor against the second mounting part detection arm for detection, it is possible to avoid pits caused by wear of the second mounting part and the detection arm that affect the detection accuracy. In addition, since the probe pin is detachably connected to the second mounting part and the detection arm, when the probe pin affects the detection result due to wear, the probe pin can be replaced, thereby improving the detection accuracy of the runout detection.

[0015] As a possible implementation manner of the first aspect, the elastic member is a spring, which is mounted on the first sensor and the probe pin corresponding to the first sensor, and / or is mounted on the second sensor and the probe pin corresponding to the second sensor.

[0016] As described above, by sleeve-arranging the spring on the first sensor, the second sensor and the corresponding probe pins, the spring can be positioned by the first sensor, the second sensor and the probe pin to prevent the spring from being deflected during deformation and affecting the measurement result. Thus, the measurement accuracy of the wheel hub runout measurement device can be improved.

[0017] As a possible implementation of the first aspect, the detection mechanism also includes: a limit member, which is arranged on the first mounting member, and when the second mounting member slides to a predetermined position, the limit member abuts against the second mounting member, and / or the limit member is arranged on the second mounting member, and when the detection arm rotates to a predetermined position, the limit member abuts against the detection arm.

[0018] As described above, by setting the limiter on the first mounting member and the second mounting member, the movement and rotation range of the second mounting member and the detection arm can be limited, so as to avoid the second mounting member and the detection arm from moving and rotating too much, thereby preventing the first sensor and the second sensor from being damaged. In this way, the safety and stability of the wheel hub runout measuring device can be improved.

[0019] As a possible implementation manner of the first aspect, two detection mechanisms are provided, and the measuring heads of the two detection mechanisms abut against the wheel hub at two axial positions on the outer circumferential surface of the wheel hub.

[0020] From the above, the two positions of the wheel hub can be tested for runout by using two testing mechanisms, thereby improving the testing efficiency.

[0021] As a possible implementation of the first aspect, the moving mechanism includes: a first slide rail, which extends horizontally; a second slide rail, which extends vertically, the second slide rail is arranged on the first slide rail and is slidably connected to the first slide rail, and the first mounting member is arranged on the second slide rail and is slidably connected to the second slide rail; a first drive motor, which is transmission-connected to the second slide rail and drives the second slide rail to slide along the first slide rail; and a second drive motor, which is transmission-connected to the first mounting member and drives the first mounting member to slide along the second slide rail.

[0022] As described above, the first drive motor drives the second slide rail to slide along the first slide rail, so that the first mounting member and the detection mechanism on the second slide rail can be moved in the horizontal direction. The second drive motor drives the first mounting member to slide along the second slide rail, so that the first mounting member and the detection mechanism can be moved in the vertical direction. In this way, the position of the detection mechanism can be adjusted so that the detection head abuts against the position to be detected of the wheel hub, and the wheel hub is tested for runout.

[0023] As a possible implementation of the first aspect, it also includes a spindle mechanism and a conveying mechanism, the spindle mechanism includes a spindle, and the spindle is used to drive the wheel hub to rotate; the conveying mechanism includes: a conveyor belt, and two conveyor belts are provided, which are parallelly arranged on both sides of the spindle, and are used to drive the wheel hub to move in a horizontal direction, so that the wheel hub moves above the spindle; a first drive cylinder, the first drive cylinder is connected to the conveyor belt, and drives the conveyor belt to move up and down.

[0024] From above, the wheel hub can be conveyed to the top of the main shaft through the conveyor belt, and the conveyor belt can be driven down by the first driving cylinder, so that the wheel hub can be dropped onto the main shaft, so that the main shaft drives the wheel hub to rotate, and the detection mechanism can perform a runout detection on the wheel hub.

[0025] As a possible implementation of the first aspect, it also includes a centering mechanism, which includes: a centering roller, a plurality of which are vertically arranged above the main shaft and around the main shaft; a second driving cylinder, which is transmission-connected to the plurality of centering rollers to drive the plurality of centering rollers toward the axis center of the main shaft.

[0026] From the above, the second driving cylinder can drive the centering roller to approach the axis of the main shaft, so that the axis of the hub can be pushed to coincide with the axis of the main shaft, so that after the first driving cylinder drives the conveying roller to descend, it is convenient for the hub to be installed on the main shaft. At the same time, when the hub rotates with the main shaft, the hub can be rotated around the axis of the hub, thereby improving the detection accuracy of the runout detection.

[0027] The second aspect of the present application provides a wheel hub measuring device, comprising: a wheel hub runout measuring device, which is the wheel hub runout measuring device described in any one of the first aspect of the present application; and a wheel hub dynamic balancing measuring device, which is used to measure the dynamic balance of the wheel hub.

[0028] From the above, the displacement mechanism moves the detection mechanism to the detection position so that the measuring head abuts against the wheel hub. When the runout of the wheel hub is measured, the second mounting member is connected to the first mounting member in a radial sliding manner along the wheel hub. When the radial dimension of the wheel hub changes, the second mounting member can be pushed to slide on the first mounting member by the measuring head, and the displacement of the second mounting member is detected by the first sensor, so that the runout of the wheel hub in the radial direction can be detected. The detection arm is hinged with the second mounting member. When the axial dimension of the wheel hub changes, the detection arm can be pushed to rotate on the second mounting member by the measuring head, and the rotation amount of the detection arm can be detected by the second sensor, so that the runout of the wheel hub in the axial direction can be detected. In this way, the runout of the wheel hub in both the radial and axial directions can be detected. In addition, by setting the detection arm on the second mounting member and setting the measuring head on the detection arm, the runout of the wheel hub in the radial and axial directions can be detected at the same time after the measuring head abuts against the wheel hub. In this way, the structure of the detection mechanism can be simplified and the structure of the detection mechanism can be made more compact.

[0029] Compared with the prior art, the beneficial effects of the wheel hub runout measuring device and the wheel hub measuring equipment in the present application include at least: it can realize the detection of the runout of the wheel hub in both radial and axial directions; it can detect the runout of the wheel hub in radial and axial directions at the same time; it can simplify the structure of the detection mechanism and make the structure of the detection mechanism more compact; it can improve the safety and stability of the wheel hub runout measuring device; it can improve the detection accuracy of the runout detection.

[0030] These and other aspects of the invention will become apparent from the following description of the embodiment(s). BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The following further illustrates the various features of the present invention and the relationship between the various features with reference to the accompanying drawings. The accompanying drawings are all exemplary, some features are not shown in actual proportion, and some drawings may omit the conventional features in the field involved in the present application and are not necessary for the present application, or additionally show the features that are not necessary for the present application. The combination of the various features shown in the accompanying drawings is not intended to limit the present application. In addition, throughout this specification, the same figure numerals refer to the same content. The specific description of the drawings is as follows:

[0032] Figure 1 This is a schematic diagram of the layout of the wheel hub measurement equipment in this application;

[0033] Figure 2 for Figure 1 Schematic diagram of the front side orthographic projection structure of the center hub runout measuring device;

[0034] Figure 3 for Figure 1 Schematic diagram of the right side orthographic projection structure of the middle hub runout measuring device;

[0035] Figure 4 for Figure 1 A schematic diagram of the three-dimensional structure of the hub runout measuring device with some structures omitted;

[0036] Figure 5 for Figure 4 A schematic diagram of the side projection structure of the moving mechanism and the detection mechanism;

[0037] Figure 6 for Figure 4 Schematic diagram of the three-dimensional structure of the moving mechanism and the detection mechanism;

[0038] Figure 7 for Figure 6 A schematic diagram of the side projection structure of the detection mechanism;

[0039] Figure 8 for Figure 6 The top orthographic projection structure diagram of the detection mechanism;

[0040] Fig. 9 for Figure 6 Schematic diagram of the three-dimensional structure of the detection mechanism;

[0041] Fig.10 for Figure 1 Schematic diagram of the side projection structure of the center hub dynamic balancing measurement device;

[0042] Fig.11 for Fig.10 A three-dimensional structural diagram of the center hub dynamic balancing measuring device with some structures omitted;

[0043] Fig.12 for Fig.10 A schematic diagram of the side projection structure of the installation structure of the second spindle mechanism;

[0044] Fig.13 for Fig.10 A three-dimensional structural schematic diagram of the installation structure of the second spindle mechanism;

[0045] Fig.14 for Figure 1 Schematic diagram of the three-dimensional structure of the middle feeding device;

[0046] Fig.15 for Figure 1 A schematic diagram of the rear orthographic projection structure of the middle buffer blocking device;

[0047] Fig.16 for Figure 1 A schematic diagram of the front orthographic projection structure of the middle buffer blocking device;

[0048] Fig.17 for Figure 1 A schematic diagram of the side projection structure of the middle buffer blocking device;

[0049] Fig.18 for Figure 1 A schematic diagram of the three-dimensional structure of the middle buffer blocking device;

[0050] Fig.19 for Fig.15 Partial cross-sectional view of the middle buffer barrier device in the AA direction.

[0051] Description of Reference Numerals

[0052] 10 wheel hub measuring device; 100 wheel hub runout measuring device; 110 moving mechanism; 111 first slide rail; 112 second slide rail; 113 first drive motor; 114 second drive motor; 115 first lead screw; 116 second lead screw; 120 detection mechanism; 121 first mounting member; 121a third slide rail; 121b limiting portion; 121c screw hole; 122 second mounting member; 122a first mounting portion; 122b second mounting portion; 122c slider; 123 first displacement sensor; 124 third mounting member; 124a dust cover; 124b notch; 125 second displacement sensor; 126 measuring head; 127 first elastic member; 128 measuring head pin; 129 limiting member; 130 first spindle mechanism; 131 first spindle; 140 first conveying mechanism; 141 first conveying belt; 142 first drive cylinder; 15 0 first centering mechanism; 151 first centering roller; 200 wheel hub dynamic balancing measuring device; 210 frame; 220 second spindle mechanism; 221 second spindle; 222 connecting member; 230 first support rod; 240 force sensor; 250 second support rod; 251 ball; 260 second conveying mechanism; 261 second conveying belt; 262 third driving cylinder; 270 second centering mechanism; 271 second centering roller; 300 buffer blocking device; 310 first blocking plate; 311 positioning hole; 320 second blocking plate; 330 proximity switch; 340 positioning member; 341 main body; 342 abutting portion; 350 second elastic member; 360 buffer pad; 370 fifth driving cylinder; 400 first conveying roller; 500 unloading device; 510 second conveying roller; 520 third centering mechanism; 521 third centering roller; 530 marker. DETAILED DESCRIPTION

[0053] The words "first, second, third, etc." in the specification and claims are only used to distinguish similar objects and do not represent a specific ordering of the objects. It is understandable that the specific order or sequence can be interchanged where permitted so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein.

[0054] The term "comprising" as used in the description and claims should not be interpreted as being limited to what is listed thereafter; it does not exclude other elements. It should therefore be interpreted as specifying the presence of the features, integers or components mentioned, but does not exclude the presence or addition of one or more other features, integers or components and groups thereof. Thus, the expression "a device comprising means A and B" should not be limited to a device consisting of components A and B only.

[0055] References to "one embodiment" or "an embodiment" in this specification mean that a particular feature, structure, or characteristic described in conjunction with the embodiment is included in at least one embodiment of the present invention. Therefore, the phrases "in one embodiment" or "in an embodiment" appearing in various places in this specification do not necessarily refer to the same embodiment, but may refer to the same embodiment. In addition, in one or more embodiments, the particular features, structures, or characteristics can be combined in any appropriate manner, as would be apparent to one of ordinary skill in the art from this disclosure.

[0056] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present application. In case of any inconsistency, the meaning described in this specification or the meaning derived from the contents recorded in this specification shall prevail. In addition, the terms used herein are only for the purpose of describing the embodiments of the present application and are not intended to limit the present application.

[0057] In order to accurately describe the technical contents in this application and to accurately understand the present invention, the following explanations or definitions are given for the terms used in this specification before describing the specific implementation methods.

[0058] Dynamic balance: Some high-speed rotating moving bodies may have uneven mass distribution and processing levels that deviate from the design value due to various problems such as material, processing technology and assembly quality. This causes the central inertia axis of the rotating body to not coincide with the actual rotation axis, generating unbalanced torque and vibration. Therefore, dynamic balance is also called dynamic imbalance.

[0059] Runout: The difference between the maximum and minimum readings measured in a given direction by a fixed indicator when the reference axis rotates one circle.

[0060] The specific structure of the wheel hub measuring device 10 in the present application is described in detail below in conjunction with the accompanying drawings.

[0061] Figure 1 FIG. 1 is a schematic diagram of the layout of the wheel hub measuring device 10 in this application. Figure 1As shown, the wheel hub measuring device 10 in the present application includes a wheel hub runout measuring device 100, a wheel hub dynamic balancing measuring device 200, a buffer blocking device 300, a first conveying roller 400 and a feeding device 500. Among them, there are two feeding devices 500, and the first conveying roller 400, the wheel hub runout measuring device 100, the feeding device 500, the wheel hub dynamic balancing measuring device 200 and the feeding device 500 are arranged in a straight line. The first conveying roller 400 is used to convey the wheel hub to the wheel hub runout measuring device 100, and the wheel hub runout measuring device 100 is used to perform runout detection on the wheel hub. The feeding device 500 behind the wheel hub runout measuring device 100 is used to convey the wheel hub detected by the wheel hub runout measuring device 100 to the wheel hub dynamic balancing measuring device 200, and the wheel hub dynamic balancing measuring device 200 performs dynamic balancing detection on the wheel hub. After the detection is completed, the feeding device 500 behind the wheel hub dynamic balancing measuring device 200 conveys the wheel hub to the next process.

[0062] There are two buffer blocking devices 300, which are respectively located at the corresponding positions of the wheel hub on the two unloading devices 500. When the wheel hub detected by the wheel hub runout measuring device 100 and the wheel hub dynamic balancing measuring device 200 is transported to the predetermined position by the two unloading devices 500, the buffer blocking device 300 can detect the arrival information of the wheel hub. After the buffer blocking device 300 detects the arrival information of the wheel hub, the unloading device 500 is controlled to stop transporting the wheel hub accordingly, so that the wheel hub stops at the predetermined position, so as to avoid the roller on the unloading device 500 continuing to rotate and scratching the wheel hub after the wheel hub stops in place under the obstruction of the buffer blocking device 300. When the detection result of the wheel hub by the wheel hub runout measuring device 100 is qualified, the unloading device 500 behind the wheel hub runout measuring device 100 can transport the wheel hub to the wheel hub dynamic balancing measuring device 200, and the wheel hub dynamic balancing measuring device 200 performs dynamic balancing detection on the wheel hub. When the wheel hub runout measuring device 100 detects that the wheel hub is unqualified, the unloading device 500 behind the wheel hub runout measuring device 100 can push the unqualified wheel hub to the unloading roller through a push plate to recycle the wheel hub. Similarly, when the wheel hub dynamic balancing measuring device 200 detects that the wheel hub is qualified, the unloading device 500 behind the wheel hub dynamic balancing measuring device 200 can transport the wheel hub to the next process. When the wheel hub dynamic balancing measuring device 200 detects that the wheel hub is unqualified, the unloading device 500 behind the wheel hub dynamic balancing measuring device 200 can push the unqualified wheel hub on the unloading device 500 to the unloading roller through a push plate to recycle the wheel hub.

[0063] Wheel runout measuring device 100

[0064] Figure 2 for Figure 1 A schematic diagram of the front side orthographic projection structure of the middle wheel hub runout measuring device 100; Figure 3 for Figure 1 A schematic diagram of the right side orthographic projection structure of the hub runout measuring device 100; Figure 4 for Figure 1 The schematic diagram of the three-dimensional structure of the wheel hub runout measuring device 100 is shown in FIG. Figure 2-Figure 4 As shown, the wheel hub runout measuring device 100 in the present application includes a moving mechanism 110, a detection mechanism 120, a first spindle mechanism 130, a first conveying mechanism 140 and a first centering mechanism 150. Among them, after the first conveying mechanism 140 conveys the wheel hub sent by the first conveying roller 400 to the position above the first spindle mechanism 130, the first centering mechanism 150 drives the wheel hub to be centered. Then the first conveying mechanism 140 places the wheel hub on the first spindle mechanism 130, and the first spindle mechanism 130 drives the wheel hub to rotate around the axis of the wheel hub. The moving mechanism 110 drives the following measuring head 126 of the detection mechanism 120 to abut against the outer peripheral surface of the wheel hub to perform runout detection on the wheel hub.

[0065] like Figure 2-Figure 4 As shown, the first spindle mechanism 130 has a vertically arranged first spindle 131. After the wheel hub is placed on the first spindle 131, the first spindle 131 can be engaged with the wheel hub. The first spindle 131 can drive the wheel hub to rotate around the axis of the wheel hub under the drive of the motor.

[0066] like Figure 2-Figure 4 As shown, the first conveying mechanism 140 includes a first conveying belt 141 and a first driving cylinder 142. Among them, two first conveying belts 141 are provided, which are arranged in parallel at both sides of the first main shaft 131 and extend in the front-to-back direction, and are used to drive the wheel hub to move forward and backward in the horizontal direction, so that the wheel hub moves to the top of the first main shaft 131. The first driving cylinder 142 is arranged below the first conveying belt 141 and is connected to the first conveying belt 141 to drive the first conveying belt 141 to move up and down. Thus, the wheel hub can be transported to the top of the first main shaft 131 through the first conveying belt 141, and the first conveying belt 141 can be driven to descend through the first driving cylinder 142, so that the wheel hub can be dropped onto the first main shaft 131, so that the first main shaft 131 drives the wheel hub to rotate, so that the detection mechanism 120 can perform a runout detection on the wheel hub.

[0067] like Figure 2 , Figure 3As shown, the first centering mechanism 150 includes a first centering roller 151 and a second driving cylinder (not shown). Among them, there are four first centering rollers 151, which are vertically arranged above the first main shaft 131, arranged around the first main shaft 131, and are distributed in a square shape. The second driving cylinder is connected to the multiple first centering rollers 151 through a connecting rod transmission, and drives the four first centering rollers 151 to approach the axis of the first main shaft 131 in a vertical state. Therefore, the first centering rollers 151 can be driven by the second driving cylinder to approach the axis of the first main shaft 131, so that the axis of the hub can be pushed to coincide with the axis of the first main shaft 131, so that after the first driving cylinder 142 drives the conveying roller to descend, it is convenient for the hub to be installed on the first main shaft 131. At the same time, when the hub rotates with the first main shaft 131, the hub can be rotated around the axis of the hub, thereby improving the detection accuracy of the runout detection.

[0068] Figure 5 for Figure 4 A schematic diagram of the side orthographic projection structure of the moving mechanism 110 and the detection mechanism 120; Figure 6 for Figure 4 Schematic diagram of the three-dimensional structure of the moving mechanism 110 and the detection mechanism 120. Figure 5 , Figure 6As shown, the moving mechanism 110 includes a first slide rail 111, a second slide rail 112, a first drive motor 113 and a second drive motor 114. The first slide rail 111 is arranged at a side position of the first spindle mechanism 130 and extends in the radial direction of the wheel hub. The second slide rail 112 is arranged on the first slide rail 111 and extends in the vertical direction. The second slide rail 112 is slidably connected with the first slide rail 111, so that the second slide rail 112 can move in the radial direction of the wheel hub on the first slide rail 111. The following first mounting member 121 of the detection mechanism 120 is arranged on the second slide rail 112 and is slidably connected with the second slide rail 112, so that the detection mechanism 120 can move in the up and down direction on the second slide rail 112. There are two detection mechanisms 120. In the waiting state, the two detection mechanisms 120 are respectively located at the upper and lower ends of the second slide rail 112. The first drive motor 113 is fixed on the first slide rail 111 and is located at one end of the first slide rail 111. The driving rod of the first driving motor 113 is connected with a first lead screw 115 extending along the first slide rail 111, and the first lead screw 115 forms a lead screw transmission structure with the second slide rail 112. The first driving motor 113 can drive the second slide rail 112 to slide along the first slide rail 111 in the direction close to / away from the wheel hub by forward / reverse rotation. Two second driving motors 114 are provided and fixed at the upper end of the second slide rail 112. The driving rods of the two second driving motors 114 are respectively connected with a second lead screw 116 extending along the second slide rail 112, and the two second lead screws 116 respectively form a lead screw transmission structure with the following first mounting member 121 of a detection mechanism 120, and the second driving motor 114 drives the detection mechanism 120 to slide up / down on the second slide rail 112 by forward / reverse rotation. Thus, the second slide rail 112 is driven to slide along the first slide rail 111 by the first driving motor 113, so that the detection mechanism 120 on the second slide rail 112 can be moved in the horizontal direction, so that the detection mechanism is close to / away from the wheel hub. The second drive motor 114 drives the detection mechanism 120 to slide along the second slide rail 112, so that the detection mechanism 120 can be moved in the vertical direction. Thus, the position of the detection mechanism 120 can be adjusted so that the detection head of the detection mechanism 120 abuts against the position to be detected of the wheel hub, and the wheel hub is tested for runout. By setting two detection mechanisms 120, the runout of two different positions of the wheel hub can be tested at the same time. Thus, the detection efficiency can be improved and the detection time can be shortened.

[0069] Figure 7 for Figure 6 A schematic diagram of the side orthographic projection structure of the detection mechanism 120; Figure 8 for Figure 6 A schematic diagram of the top orthographic projection structure of the detection mechanism 120; Fig. 9 for Figure 6 Schematic diagram of the three-dimensional structure of the detection mechanism 120. Figure 7-Figure 9As shown, the detection mechanism 120 includes a first mounting member 121, a second mounting member 122, a first displacement sensor 123, a detection arm 124, a second displacement sensor 125 and a measuring head 126. The first mounting member 121 is mounted on the second slide rail 112 and is slidably connected to the second slide rail 112. The first mounting member 121 is screw-connected to the second drive motor 114, and the second drive motor 114 can drive the first mounting member 121 to move up and down along the second slide rail 112. The second mounting member 122 is mounted on the first mounting member 121 and is connected to the first mounting member 121 along the radial direction ( Figure 7 Specifically, a third slide rail 121a is provided on the first mounting member 121 along the radial direction of the wheel hub, and the first mounting portion 122a of the second mounting member 122 is slidably connected to the third slide rail 121a. Limiting portions 121b are also provided at both ends of the third slide rail 121a, and the limiting portions 121b are used to limit the sliding range of the first mounting portion 122a and prevent the first mounting portion 122a from detaching from the third slide rail 121a. The first displacement sensor 123 is fixed to the limiting portion 121b on the first mounting member 121 away from the wheel hub, so that there is no need to specially set up a mounting component for mounting the first displacement sensor 123, so as to reduce the number of parts and make the structure more compact. The first displacement sensor 123 is arranged along the radial direction of the wheel hub, and the detection end of the first displacement sensor 123 abuts against the middle position of the first mounting portion 122a of the second mounting member 122 facing away from the wheel hub. When the second mounting member 122 slides along the radial direction of the wheel hub, it can directly push the detection end of the first displacement sensor 123 to move along the radial direction of the wheel hub. In this way, not only can the size of the detection mechanism 120 in the radial direction of the wheel hub be reduced, but also the radial runout parameter of the wheel hub can be directly detected by detecting the displacement of the second mounting member 122, so as to improve the detection accuracy. Figure 7-Figure 9 As shown, the first displacement sensor 123 is located in the space between the first mounting member 121 and the detection arm 124. Figure 7 As shown in the side view, the first displacement sensor 123 overlaps with the detection arm 124 , so that when the first displacement sensor 123 detects the radial runout of the wheel hub transmitted by the detection arm 124 , the first displacement sensor 123 is located at the center of the detection, so as to improve the detection accuracy of the radial runout.

[0070] The detection arm 124 extends radially along the wheel hub, and the detection arm 124 is hinged to the second mounting member 122 at the middle position, so that the detection arm 124 can swing up and down (rotate). The second displacement sensor 125 is arranged on the second mounting member 122, and the second displacement sensor 125 is arranged along the axial direction (up and down direction) of the wheel hub, and the detection end of the second displacement sensor 125 abuts against the detection arm 124. When the detection arm 124 swings, the detection arm 124 can push the detection end of the second displacement sensor 125 to move, thereby detecting the rotation amplitude of the detection arm 124. The measuring head 126 is arranged on one end of the detection arm 124 facing the wheel hub, and is used to abut against the wheel hub. The measuring head 126 is a roller, and the axis of the measuring head 126 is at a certain angle to the extension direction of the detection arm 124. When the measuring head 126 abuts against the part to be detected on the outer peripheral surface of the wheel hub, the axis of the measuring head 126 can be made parallel to the tangent of the part to be detected. Thus, when the size of the part to be detected fluctuates in the radial direction, the second mounting member 122 and the detection arm 124 can be pushed to move in the radial direction of the hub by the measuring head 126. When the size of the part to be detected fluctuates in the axial direction, the detection arm 124 can be pushed to rotate in the axial direction of the hub by the measuring head 126. Figure 7 As shown, the distance between the detection end of the second displacement sensor 125 and the abutment position of the detection arm 124 and the hinged position of the detection arm 124 is greater than the distance between the abutment position of the measuring head 126 and the wheel hub and the hinged position of the detection arm 124. Therefore, when the detection arm 124 transmits axial runout by rotation, the runout value detected by the second displacement sensor 125 can be amplified, thereby making the axial runout easier to detect.

[0071] As described above, the displacement mechanism moves the detection mechanism 120 to the detection position so that the measuring head 126 abuts against the wheel hub. When measuring the runout of the wheel hub, the second mounting member 122 is connected to the first mounting member 121 by sliding along the radial direction of the wheel hub. When the radial dimension of the wheel hub changes, the second mounting member 122 can be pushed to slide on the first mounting member 121 by the measuring head 126, and the displacement of the second mounting member 122 can be detected by the first displacement sensor 123, so that the runout of the wheel hub in the radial direction can be detected. The detection arm 124 is hinged with the second mounting member 122. When the axial dimension of the wheel hub changes, the detection arm 124 can be pushed to rotate on the second mounting member 122 by the measuring head 126, and the rotation amount of the detection arm 124 can be detected by the second displacement sensor 125, so that the runout of the wheel hub in the axial direction can be detected. In this way, the runout of the wheel hub in both the radial and axial directions can be detected. In addition, by arranging the detection arm 124 on the second mounting member 122 and arranging the measuring head 126 on the detection arm 124, the radial and axial runout of the wheel hub can be detected simultaneously after the measuring head 126 abuts against the wheel hub. Thus, the structure of the detection mechanism 120 can be simplified and made more compact.

[0072] At the same time, since the requirements for detection stability and detection accuracy are very high when measuring the runout of the wheel hub, when using the sliding connection method, it is necessary for the slider and the slide rail to have a sufficiently large matching length, that is, the first mounting portion 122a (slider 122c) and the third slide rail 121a need to be set to a larger size to ensure the stability of sliding and improve the detection accuracy. Therefore, the size of the sliding connection structure between the first mounting member 121 and the second mounting member 122 is relatively large. If the detection in the radial direction of the wheel hub is also set to a sliding connection, even if the detection arm 124 is slidingly connected to the second mounting member 122, the size of the sliding connection structure between the detection arm 124 and the second mounting member 122 also needs to be set to a larger structure to meet the requirements of sliding stability and detection accuracy. In the present application, by making the detection arm 124 hinged to the second mounting member 122 at its middle position, it can be as shown Figure 7 , Figure 8 As shown in , the size of the hinge structure is adapted to the size of the first mounting portion 122a, and the first mounting portion 122a does not need to protrude, thereby reducing the size of the connection structure between the detection arm 124 and the second mounting member 122, making the structure more compact.

[0073] In addition, in the present application, radial runout is measured by sliding the second mounting member 122 left and right on the first mounting member 121 (radial runout), and axial runout is measured by rotating the detection arm 124 up and down on the second mounting member 122 (axial runout). Thus, axial runout and radial runout can be detected simultaneously. If a structure opposite to the above structure is adopted (i.e., radial runout adopts the mode of rotating left and right, and axial runout adopts the mode of sliding up and down) for axial and radial runout detection, the sliding direction will change with the change of the rotation direction, thereby affecting the accuracy of runout measurement. At the same time, when the opposite structure is adopted, since the detection arm 124 needs to slide up and down on the second mounting member 122, the extension direction of the detection arm 124 is different from its sliding direction, so that the detection arm 124 needs to be provided with a turning structure, thereby affecting the compactness of the structure. That is, by using the above structure in the present application, not only the stability of the action during runout detection can be improved, but also the compactness of the structure can be improved.

[0074] In addition, as an example, the first displacement sensor 123 and the second displacement sensor 125 respectively have a sensor body and a measuring rod installed on the sensor body, the measuring rod can be telescopically moved relative to the sensor body in the axial direction, and a spring is installed between the two, and the spring applies force to the measuring rod so that it can be reset in the axial direction. The above-mentioned "detection end" is located on the measuring rod.

[0075] like Figure 7 , Figure 8 As shown, the first displacement sensor 123 is installed at a position where its axis and the rotation axis of the detection arm 124 intersect vertically, and a notch 124b is provided on the detection arm 124 to avoid the installation screw of the first displacement sensor 123 (the figure shows the screw hole 121c, and the screw is not shown). Therefore, when the first displacement sensor 123 is installed, it is convenient to install the screw in the screw hole 121c from the notch 124b to fix the first displacement sensor 123.

[0076] like Figure 7-Figure 9As shown, the second mounting member 122 includes a first mounting portion 122a and a second mounting portion 122b. The first mounting portion 122a is a square block component as a whole, and one side surface of the first mounting portion 122a is slidably connected to the first mounting member 121. The second mounting portion 122b is arranged on the other side surface of the first mounting portion 122a, and the detection arm 124 is also located on the other side surface of the first mounting portion 122a and is hinged to the first mounting portion 122a. The second mounting portion 122b is located on the plane where the detection arm 124 rotates, and is parallel to the detection arm 124 when it is not in the detection state. The second displacement sensor 125 is fixed on the second mounting portion 122b, and is also located on the plane where the detection arm 124 rotates (swings). The extension direction of the second displacement sensor 125 is perpendicular to the extension direction of the second mounting portion 122b, so that the measuring rod of the second displacement sensor 125 abuts against the detection arm 124.

[0077] like Figure 7-Figure 9 As shown, the detection mechanism 120 also includes a first elastic member 127 and a probe pin 128. Among them, two probe pins 128 are provided, and are made of cemented carbide. One probe pin 128 is threadedly connected to the second mounting member 122, and is located at a position corresponding to the detection end of the first displacement sensor 123 and abuts against the first displacement sensor 123. The other probe pin 128 is threadedly connected to the detection arm 124, and is located at a position corresponding to the detection end of the second displacement sensor 125 and abuts against the second displacement sensor 125. By providing the probe pin 128, the second mounting member 122 can be abutted against the first displacement sensor 123 through the probe pin 128, and the detection arm 124 can be abutted against the second displacement sensor 125 through the probe pin 128. By using a probe pin 128 that is harder than the second mounting member 122 and the detection arm 124, compared with the method in which the first displacement sensor 123 and the second displacement sensor 125 are directly against the second mounting member 122 and the detection arm 124 for detection, it is possible to avoid affecting the detection accuracy due to pits caused by wear of the second mounting member 122 and the detection arm 124. In addition, since the probe pin 128 is detachably connected to the second mounting member 122 and the detection arm 124, when the probe pin 128 affects the detection result due to wear, the probe pin 128 can be replaced, thereby improving the detection accuracy of the runout detection.

[0078] like Figure 7-Figure 9As shown, the first elastic member 127 is a spring. One first elastic member 127 is arranged between the first mounting member 121 and the second mounting member 122, and is sleeved outside the first displacement sensor 123 and the corresponding probe pin 128, and applies force in the direction of pushing the second mounting member 122 away from the first displacement sensor 123. Another first elastic member 127 is arranged between the second mounting portion 122b (the second mounting member 122) and the detection arm 124, and is sleeved on the second displacement sensor 125 and the corresponding probe pin 128, and applies force in the direction of pushing the detection arm 124 away from the second displacement sensor 125. By providing such a first elastic member 127, the impact force on the first displacement sensor 123 and the second displacement sensor 125 can be reduced, and the service life of the first displacement sensor 123 and the second displacement sensor 125 can be improved. In addition, by sleeve-arranging the spring on the first displacement sensor 123, the second displacement sensor 125 and the corresponding probe pin 128, the spring can be positioned by the first displacement sensor 123, the second displacement sensor 125 and the probe pin 128 to prevent the spring from being deflected during deformation and affecting the measurement result. Thus, the measurement accuracy of the wheel hub runout measurement device 100 can be improved.

[0079] like Figure 7-Figure 9 As shown, the detection mechanism 120 also includes a limit member 129, and the specific limit member 129 is a limit bolt. There are two limit members 129, one of which is arranged on the first mounting member 121 and is threadedly connected to the first mounting member 121. When the second mounting member 122 slides to a predetermined position, the end of the limit member 129 abuts against the second mounting member 122. Another limit member 129 is arranged on the second mounting member 122 and is threadedly connected to the second mounting member 122. When the detection arm 124 rotates to a predetermined position, the end of the limit member 129 abuts against the detection arm 124. Therefore, by arranging the limit member 129 on the first mounting member 121 and the second mounting member 122, the movement and rotation range of the second mounting member 122 and the detection arm 124 can be limited, so as to avoid the movement and rotation range of the second mounting member 122 and the detection arm 124 being too large, causing damage to the first displacement sensor 123 and the second displacement sensor 125. Therefore, the safety and stability of the wheel hub runout measuring device 100 can be improved.

[0080] like Figure 7-Figure 9 As shown, the detection arm 124 is hinged with the second mounting member 122 through a rotating shaft, a bearing and other structures, thereby reducing the friction of the detection arm 124 when rotating, so as to improve the detection accuracy. The detection arm 124 is also provided with a dust cover 124a at the hinged position with the second mounting member 122. Since the environment of the wheel hub detection workshop is relatively harsh, the dust cover 124a can protect the rotating shaft, bearing and other components of the detection arm 124 at the hinged position with the second mounting member 122, so as to prevent dust and other debris from entering and affecting the detection accuracy.

[0081] Here, the rotating shaft, the bearing (the housing for accommodating the bearing), etc. constitute an articulated mechanism, and the length of the third slide rail 121a is greater than the size of the articulated mechanism in the axial direction of the wheel hub. That is to say, overall, the size of the detection mechanism in the axial direction of the wheel hub is determined by the sliding mechanism formed by the third slide rail 121a, not by the articulated mechanism. If the articulated mechanism is changed into an up-and-down sliding structure according to the size of the sliding mechanism, the size of the detection mechanism in the axial direction of the wheel hub will be increased. That is to say, the structure of this embodiment enables the detection mechanism to be miniaturized.

[0082] In addition, in this embodiment, the third slide rail 121a is an inner slide rail. It goes without saying that the first mounting portion 122a side, i.e., the slider 122c, has an outer slide rail. The size of the outer slide rail or the slider 122c in the axial direction of the hub (up and down direction) is larger than the size of the above-mentioned hinge mechanism in the up and down direction. It can be understood that the size of the outer slide rail or the slider 122c in the axial direction of the hub (up and down direction) is the total span of the slide rail mechanism in the up and down direction. According to such a size, if the hinge mechanism is changed to a slide rail structure that slides up and down, then in order to ensure the detection accuracy and the span size of the upper and lower slide rails, the first mounting portion 122a needs to be in the radial direction of the hub ( Figure 7 Therefore, by adopting this embodiment, the dimension of the first mounting member 122a in the radial direction of the hub, that is, the extension direction of the third slide rail 123a, can be reduced, thereby further miniaturization can be achieved.

[0083] Reference Figure 7 In this embodiment, the first mounting portion 122a is located in the radial direction of the hub ( Figure 7 The dimension in the left-right direction (in the middle) is smaller than the dimension of the slider (and the first mounting portion 122a) matched with the third slide rail 121a in the axial direction (up-down direction) of the hub, so that the third slide rail 121a is Figure 7 It has a smaller size in the center and left and right directions, further achieving miniaturization.

[0084] Wheel hub dynamic balancing measuring device 200

[0085] Fig.10 for Figure 1 A schematic diagram of the side projection structure of the center wheel hub dynamic balancing measuring device 200; Fig.11 for Fig.10 A schematic diagram of the three-dimensional structure of the center wheel hub dynamic balancing measuring device 200 with some structures omitted; Fig.12 for Fig.10 A schematic side orthographic structural diagram of the installation structure of the second spindle mechanism 220; Fig.13 for Fig.10 Schematic diagram of the three-dimensional structure of the installation structure of the second spindle mechanism 220. Figure 10-13 As shown, the wheel hub dynamic balancing measuring device 200 includes a frame 210, a second spindle mechanism 220, a first support rod 230 and a force sensor 240. The second spindle mechanism 220 has a second spindle 221 arranged vertically. After the wheel hub is placed on the second spindle 221, the second spindle 221 can be fastened to the wheel hub by means of expanding claws and the like. The second spindle 221 can drive the wheel hub to rotate around the axis of the wheel hub under the drive of the motor. The first support rod 230 is an axial spring steel member, which can be made of 65Mn, for example. The first support rod 230 is arranged horizontally, connecting the frame 210 and the second spindle mechanism 220, and is used to support the second spindle mechanism 220, supporting the second spindle mechanism 220 in a cantilevered manner, and making the spindle mechanism and the frame 210 flexibly connected. When the second spindle mechanism 220 drives the wheel hub to rotate, when the wheel hub has a problem of center of gravity offset, the second spindle mechanism 220 as a whole can shake with the wheel hub. The force sensor 240 is fixed on the frame 210, and the detection end of the force sensor 240 is connected to the second spindle mechanism 220 to detect the centrifugal force when the second spindle mechanism 220 shakes. The rotating shaft produces a certain amplitude of reciprocating displacement change with the same frequency as the rotation speed, which can be simplified as a single degree of freedom forced vibration. The centrifugal force can be accurately measured by the vibration (force) sensor, and the imbalance of the rotor can be obtained. Therefore, the dynamic balance of the wheel hub can be detected by detecting the centrifugal force. Determine the position and number of balancing blocks added to the wheel hub so that the center of gravity of the wheel hub is at the axial center position of the wheel hub.

[0086] In addition, by arranging the second main shaft 221 vertically, the wheel hub can be kept in a horizontal state when being placed on the second main shaft 221. Therefore, when the wheel hub is transported on the unloading device 500 between two adjacent workstations of the wheel hub dynamic balancing measuring device 200, the wheel hub can be transported in a horizontal state, thereby avoiding the impact of the wheel hub rolling on the transport safety when the wheel hub is transported vertically. At the same time, by arranging the second main shaft 221 vertically, the wheel hub can be easily placed on the second main shaft 221.

[0087] After the wheel hub is placed on the second main shaft 221, the wheel hub can be automatically positioned horizontally under the action of its own weight, thereby improving the convenience of installing the wheel hub. At the same time, the second main shaft 221 can also conveniently position the center of the wheel hub by expanding the claws, thereby further improving the convenience of installing the wheel hub. Moreover, since the second main shaft 221 is vertically arranged and the wheel hub is horizontally installed on the second main shaft 221, no matter how the size of the wheel hub changes, its center will coincide with the center of the second main shaft 221, so that the center is unique, which can facilitate the calculation of dynamic balance.

[0088] At the same time, since the second spindle 221 is arranged vertically, the wheel hub is mounted on the second spindle 221 and rotates in a horizontal plane. If the first support rod 230 supports the second spindle mechanism 220 in a vertical manner, the wheel hub will rotate with the second spindle 221 due to the center of gravity shift, causing the second spindle mechanism 220 and the wheel hub to perform circular motion (more accurately, similar to a conical motion with the vertex facing downward), which will cause difficulties in the detection of dynamic balance. In the present application, by arranging the first support rod 230 horizontally, the movement direction of the second spindle mechanism 220 in its axial direction can be limited by the first support rod 230, so that the movement of the second spindle mechanism 220 and the wheel hub during the dynamic balance detection can be converted into a fan-shaped swing, or the movement direction is substantially or approximately left-right translation, so that the dynamic balance data can be easily detected.

[0089] In the present application, by making the detection direction of the detection end of the force sensor 240 perpendicular to the axial direction of the first support rod 230 and the second spindle 221, the detection direction of the detection end of the force sensor 240 can be made the same as the shaking direction of the second spindle mechanism 220. In this way, the detection accuracy of the wheel hub dynamic balancing measuring device 200 can be further improved.

[0090] like Fig.12 , Fig.13 As shown, four first support rods 230 are horizontally arranged, and the four first support rods 230 are arranged in a square shape, and two upper and lower rods are arranged at both sides of the second spindle mechanism 220. Thus, the second spindle mechanism 220 can be supported at multiple positions on both sides of the second spindle mechanism 220, while improving the constraint of the second spindle mechanism 220 in the axial direction of the first support rod. Thus, the fan-shaped swing of the spindle mechanism during the dynamic balancing detection of the wheel hub can be closer to the left and right translation, thereby improving the detection accuracy of the dynamic balancing and making the flexible connection between the second spindle mechanism 220 and the frame 210 more stable.

[0091] like Fig.12 , Fig.13 As shown, two force sensors 240 are provided, one above the other, and are respectively located near the two first support rods 230. Thus, when the second spindle mechanism 220 shakes with the wheel hub, the difference between the force applied to the end of the force sensor 240 and the shaking force applied to the first support rods 230 can be reduced. Thus, the detection accuracy of the wheel hub dynamic balancing measuring device 200 can be improved.

[0092] like Fig.12 , Fig.13As shown, the two corresponding upper and lower first support rods 230 are arranged at positions far away from each other, so that the two force sensors 240 corresponding to the upper and lower first support rods can be made to be far away from each other, thereby reducing the influence of the up and down twisting action synchronously generated when the second spindle mechanism 220 shakes left and right on the detection of the drop degree.

[0093] like Fig.13 As shown, the force sensor 240 is fixed on the surface of the frame 210 on the side facing the second spindle mechanism 220, and the detection direction of the detection end of the force sensor 240 is perpendicular to the axial direction of the first support rod 230 and the second spindle 221, that is, the same as the shaking direction of the wheel hub when the second spindle mechanism 220 drives the wheel hub to rotate. A connecting member 222 is also fixedly arranged on the second spindle mechanism 220. The connecting member 222 extends toward the frame 210 to a position on one side of the detection end of the sensor 240, and is fixedly connected to the detection end by screws and nuts, so that when the connecting member 222 shakes with the second spindle mechanism 220, the detection end of the sensor 240 can be pushed or pulled in the axial direction of the screw. A plurality of nuts are arranged on the screw, so that the connecting member 222 and the detection end of the sensor 240 are kept fixed, thereby improving the detection accuracy.

[0094] like Fig.12 , Fig.13 As shown, the wheel hub dynamic balancing measuring device 200 further includes a second support rod 250, which is a spring steel member, and extends in the vertical direction to connect the frame 210 and the second spindle mechanism 220. Specifically, the second support rod 250 is arranged at a position away from the first support rod 230, and the upper end and the middle position of the second support rod 250 are fixedly connected to the second spindle mechanism 220, and the lower end of the second support rod 250 abuts against the frame 210, or directly abuts against the ground of the factory building. By setting the second support rod 250, the second support rod 250 supports the second spindle mechanism 220 in the vertical direction, so that the deformation of the first support rod 230 in the axial direction of the second spindle 221 when the second spindle mechanism 220 shakes can be reduced, that is, the fan-shaped swing of the second spindle mechanism 220 when performing dynamic balancing detection on the wheel hub can be made closer to left and right translation. Thus, the shaking direction of the second spindle mechanism 220 can be made closer to the detection direction of the detection end of the force sensor 240, thereby improving the detection accuracy of the force sensor 240, and further improving the detection accuracy of the wheel hub dynamic balancing measuring device 200. By making the second support rod 250 a spring steel part, the second support rod 250 can be deformed in the horizontal direction, so that when the second spindle mechanism 220 shakes with the wheel hub, the influence of the second support rod 250 on the shaking amplitude can be reduced, thereby improving the detection accuracy.

[0095] Furthermore, a ball 251 is provided at the bottom end of the second support rod 250, thereby reducing the friction between the second support rod 250 and the frame, and further reducing the influence of the second support rod 250 on the shaking amplitude when the second spindle mechanism 220 shakes with the wheel hub, thereby improving the detection accuracy.

[0096] like Fig.12 , Fig.13 As shown, the wheel hub dynamic balancing measuring device 200 also includes a support plate 280 in the form of a rectangular plate. Two support plates 280 are provided, which are respectively located at the two sides of the second spindle mechanism 220 and are respectively detachably fixedly connected to the second spindle mechanism 220 and the frame 210. Therefore, when the wheel hub dynamic balancing measuring device 200 is transported and installed, by arranging the support plate 280 between the second spindle mechanism 220 and the frame 210, the stability of the second spindle mechanism 220 can be improved, and the second spindle mechanism 220 can be prevented from shaking too much and damaging the force sensor 240. When the wheel hub dynamic balancing measuring device 200 is used to perform dynamic balancing detection on the wheel hub, the support plate 280 can be removed to detect the dynamic balance of the wheel hub.

[0097] like Fig.10 , Fig.11 As shown, the wheel hub dynamic balancing measuring device 200 also includes a second conveying mechanism 260. The second conveying mechanism 260 has the same structure as the first conveying mechanism 140, and includes a second conveying belt 261 and a third driving cylinder 262. Two second conveying belts 261 are provided, which are arranged in parallel on both sides of the second main shaft 221, and are used to drive the wheel hub to move in the horizontal direction, so that the wheel hub moves above the second main shaft 221. The third driving cylinder 262 is connected to the second conveying belt 261, and drives the second conveying belt 261 to move up and down. Thus, the wheel hub can be transported to the top of the second main shaft 221 through the second conveying belt 261, and the second conveying belt 261 can be driven to descend through the third driving cylinder 262, so that the wheel hub can be dropped onto the second main shaft 221, so that the second main shaft 221 drives the wheel hub to rotate.

[0098] like Fig.10As shown, the wheel hub dynamic balancing measuring device 200 also includes a second centering mechanism 270, which has the same structure as the first centering mechanism 150, including a second centering roller 271 and a fourth driving cylinder (not shown). Among them, there are four second centering rollers 271, which are vertically arranged above the second main shaft 221, arranged around the second main shaft 221, and distributed in a square shape. The fourth driving cylinder is connected to the plurality of second centering rollers 271 through a connecting rod transmission, and drives the four second centering rollers 271 to approach the axis of the second main shaft 221 in a vertical state. Therefore, the second centering rollers 271 can be driven by the fourth driving cylinder to approach the axis of the second main shaft 221, so that the axis of the wheel hub can be pushed to coincide with the axis of the second main shaft 221, so that after the fourth driving cylinder drives the conveying roller to descend, it is convenient for the wheel hub to be installed on the second main shaft 221. At the same time, when the wheel hub rotates with the second main shaft 221, the wheel hub can be rotated around the axis of the wheel hub, thereby improving the detection accuracy of the balance detection.

[0099] Feeding device 500

[0100] Fig.14 for Figure 1 A schematic diagram of the three-dimensional structure of the feeding device 500. Fig.14 As shown, the unloading device 500 in the present application includes a second conveying roller 510, a third centering mechanism 520, a push plate (not shown) and a marker 530. Among them, the second conveying roller 510 conveys the hub by driving the roller to rotate by a motor, and a pause station is set in the middle position of the second conveying roller 510, and the hub is paused after being conveyed to the pause station. The third centering mechanism 520 has the same structure as the first centering mechanism 150, including a third centering roller 521 and a sixth drive cylinder (not shown). Among them, there are four third centering rollers 521, which are vertically arranged above the pause station, arranged around the pause station, and distributed in a square shape. The sixth drive cylinder is connected to the plurality of third centering rollers 521 through a connecting rod transmission, and drives the four third centering rollers 521 to approach the center of the pause station in a vertical state. The marker 530 is arranged above the second conveying roller 510, located at a position corresponding to the pause station, and can mark the hub located at the pause station. The push plate is arranged at one side of the pause station, and can move in a direction perpendicular to the conveying direction of the second conveying roller 510 to push the wheel hub of the pause station to the unloading roller.

[0101] Buffering and blocking device 300

[0102] Fig.15 for Figure 1 A schematic diagram of the rear side orthographic projection structure of the middle buffer and blocking device 300; Fig.16 for Figure 1 A schematic diagram of the front orthographic projection structure of the middle buffer and blocking device 300; Fig.17 for Figure 1 A schematic diagram of the side orthographic projection structure of the middle buffer and blocking device 300; Fig.18 for Figure 1 A schematic diagram of the three-dimensional structure of the middle buffer blocking device 300; Fig.19 for Fig.15 A partial cross-sectional view of the buffer blocking device 300 along the A-A direction. Figure 15-19 As shown, the buffer blocking device 300 in the present application includes a first blocking plate 310, a second blocking plate 320 and a proximity switch 330 (sensor). The first blocking plate 310 is a rectangular plate-shaped component, which can move between a blocking position and an unblocking position. In the blocking position, the first blocking plate 310 is vertically arranged on the second conveying roller 510, located in the middle position between two adjacent conveying rollers. The first blocking plate is perpendicular to the conveying direction of the second conveying roller 510, and can block the hub on the second conveying roller 510 from further moving. The second blocking plate 320 is a rectangular plate-shaped component, which is arranged on the first blocking plate 310, located on the incoming material side of the conveying roller. The lower edge of the second blocking plate 320 is hinged to the first blocking plate 310, and the upper edge of the second blocking plate 320 is flush with the upper edge of the first blocking plate 310. The proximity switch 330 is disposed on the first blocking plate 310. When the second blocking plate 320 is detected to move to a predetermined position, the buffer blocking device 300 controls the second conveying roller 510 to stop and moves the first blocking plate 310 to a blocking-release position. Specifically, when the second blocking plate 320 is separated from the first blocking plate 310, the proximity switch 330 is in an OFF state. When the second blocking plate 320 is pushed by the wheel hub to rotate to a predetermined position, such as abutting against the first blocking plate 310, the proximity switch 330 is in an ON state.

[0103] As described above, when the second conveying roller 510 conveys the wheel hub to the pause position S (predetermined position) and the wheel hub needs to be stopped and positioned, the first blocking plate 310 is set between two adjacent conveying rollers of the second conveying roller 510, so that the first blocking plate 310 is perpendicular to the conveying direction of the corresponding second conveying roller 510, so that when the wheel hub is transported by the second conveying roller 510 to the pause position S where the first blocking plate 310 is located, the first blocking plate 310 blocks the wheel hub, so that the wheel hub stops at the pause position S under the blocking of the first blocking plate 310, thereby preventing the wheel hub from continuing to move forward due to inertia when the second conveying roller 510 stops due to its heavy weight and large inertia, thereby improving the positioning accuracy of the wheel hub and achieving reliable and accurate positioning of the wheel hub. By hingedly arranging the second blocking plate 320 and the proximity switch 330 on the first blocking plate 310, when the first blocking plate 310 blocks and positions the wheel hub, the proximity switch 330 can detect that the second blocking plate 320 is rotating, i.e., it is determined that the wheel hub has reached the pause position S. At this time, by controlling the second conveying roller 510 to stop, it can be avoided that when the wheel hub stops at the pause position S under the blockage of the first blocking plate 310, the conveying rollers of the second conveying roller 510 continue to rotate to scratch the surface of the wheel hub.

[0104] In addition, if there is a proximity switch 330 to directly detect whether the wheel hub has reached the pause station S, due to the limited detection range of the proximity switch 330, when the size of the wheel hub changes, there is a possibility that the proximity switch 330 cannot detect the wheel hub and misses the detection. In the present application, by setting the first blocking plate 310 in the middle position between the two conveying rollers, and setting the second blocking plate 320 on the side of the first blocking plate 310 facing the incoming material, the wheel hub can be abutted against the second blocking plate 320 when it reaches the pause station S, and the second blocking plate 320 can be pushed to rotate, so that the proximity switch 330 can determine whether the wheel hub has reached the pause station S by detecting the rotation of the second blocking plate 320. In this way, the adaptation range of the wheel hub size specifications can be improved, and the possibility of missed detection can be avoided.

[0105] In addition, when the proximity switch 330 is triggered, that is, when the predetermined position of the wheel hub is detected, the control mechanism operates the marker 530, and can mark the wheel hub according to the detection results of the runout or dynamic balancing process. In addition, according to the detection results of the runout or dynamic balancing process, when the wheel hub is considered to be an unqualified product, no marking is performed, and the wheel hub is moved in a direction perpendicular to the conveying direction of the second conveying roller 510 by the push plate, and then moved to the unloading roller to be conveyed to the scrap station; when the wheel hub is considered to be a qualified product, after the marking is completed, the second conveying roller 510 conveys the wheel hub to the next process (the specific structure is described below).

[0106] like Fig.16 , Fig.19As shown, a square groove for installing the proximity switch 330 is provided in the middle of the upper edge of the first blocking plate 310, and the proximity switch 330 is installed in the groove of the first blocking plate 310. Specifically, the detection end of the proximity switch is inside the groove, that is, hidden in the side surface of the first blocking plate 310 facing the second blocking plate 320. Therefore, when the second blocking plate 320 rotates toward the first blocking plate 310 under the push of the wheel hub and abuts against the first blocking plate, the second blocking plate 320 is prevented from directly contacting the proximity switch 330, thereby preventing the second blocking plate 320 from hitting the proximity switch 330.

[0107] like Fig.15 , Fig.17 , Fig.18 As shown, the second blocking plate 320 is hinged at the middle position of the first blocking plate 310 at the lower edge position, and the proximity switch 330 is arranged at the middle position close to the upper edge of the first blocking plate 310. Thus, the size of the second blocking plate 320 can be reduced, making the structure simpler. By arranging the proximity switch 330 at a position away from the hinge, the distance between the second blocking plate 320 and the proximity switch 330 can be increased when the wheel hub does not reach the predetermined position, thereby avoiding the situation where the proximity switch 330 is falsely triggered. Thus, the detection accuracy of the buffer blocking device 300 can be improved.

[0108] like Fig.17 As shown, the buffer blocking device 300 further includes a positioning member 340, which is disposed on the second blocking plate 320. When the second blocking plate 320 rotates to a predetermined position, the positioning member 340 abuts against the first blocking plate 310. Specifically, a positioning hole 311 is disposed on the first blocking plate 310, and the positioning hole 311 is disposed at a corresponding position of the positioning member 340. The positioning member 340 includes a main body 341 and an abutting portion 342. The main body 341 is cylindrically disposed in the positioning hole 311, and the abutting portion 342 is disposed on the main body 341 at an end away from the second blocking plate 320. The size of the abutting portion 342 is larger than the positioning hole 311, so that when the second blocking plate 320 rotates to make its upper side edge away from the first blocking plate 310 and approach the switch 330, the abutting portion 342 can abut against the positioning hole 311 at a suitable position. Thus, the second blocking plate 320 can be positioned by the positioning member 340 to prevent the second blocking plate 320 from rotating too much, so that when the wheel hub arrives at the predetermined position along with the conveying roller, it cannot abut against the second blocking plate 320. Thus, the success rate of the wheel hub in-position detection can be improved.

[0109] like Fig.16As shown, the positioning hole 311 is a long hole, and the extending direction of the positioning hole 311 is perpendicular to the axial direction of the hinge between the second blocking plate 320 and the first blocking plate 310. When the positioning member rotates with the second blocking plate 320, the position where the main body 341 intersects with the first blocking plate 310 will move on the first blocking plate 310 along the direction perpendicular to the axial direction of the hinge between the second blocking plate 320 and the first blocking plate 310. Therefore, in the present application, by setting the positioning hole 311 as a long hole extending in the direction perpendicular to the axial direction of the hinge between the second blocking plate 320 and the first blocking plate 310, it is possible to prevent the positioning member from getting stuck in the positioning hole 311 and affecting the rotation of the second blocking plate 320.

[0110] like Fig.17 As shown, the buffer blocking device 300 further includes a second elastic member 350, and the second elastic member 350 pushes the second blocking plate 320 away from the proximity switch 330. Thus, when the wheel hub does not reach the predetermined position, the second elastic member 350 pushes the second blocking plate 320 away from the proximity switch 330 to avoid the false triggering of the proximity switch 330. Thus, the detection accuracy of the buffer blocking device 300 can be improved.

[0111] like Fig.17 As shown, the second elastic member 350 is a spring, which is sleeved on the main body 341 and located between the first blocking plate 310 and the second blocking plate 320. In this way, the spring can be prevented from being deflected when deformed, thereby improving the stability of the spring and the success rate of the in-place detection of the wheel hub. At the same time, by sleeved on the main body 341 to buffer and reset the second blocking plate 320, it is possible to avoid setting a separate spring installation structure, thereby reducing the number of parts of the buffer blocking device 300 and making the structure simpler.

[0112] like Fig.16 As shown, two positioning members 340 are provided, which are located on the second blocking plate 320 away from the hinged side, and the proximity switch 330 is located in the middle of the two positioning members 340. Therefore, by arranging the proximity switch 330 in the middle of the two positioning members 340, the stability of the proximity switch 330 sensing the second blocking plate 320 can be improved, and the success rate of the wheel hub in-place detection can be improved.

[0113] like Fig.15 , Fig.17 As shown, the buffer blocking device 300 further includes a buffer pad 360, which is disposed on the second blocking plate 320 and is located on the surface of the side away from the first blocking plate 310. The buffer pad 360 is made of a relatively soft material such as polyurethane, rubber or silicone. Thus, the second blocking plate 320 can be abutted against the wheel hub through the buffer pad 360, so that the buffer pad 360 can provide a buffer to avoid damage to the wheel hub and the second blocking plate 320.

[0114] like Figure 15-18 As shown, the buffer blocking device 300 also includes a fifth drive cylinder 370, and the drive rod of the fifth drive cylinder 370 is connected to the first blocking plate 310 to drive the first blocking plate 310 to move up and down. Thus, the first blocking plate 310 can be driven up and down by the fifth drive cylinder 370, so that the first blocking plate 310 is located at a position corresponding to the wheel hub on the second conveying roller 510. When the wheel hub reaches the pause position S, the wheel hub abuts against the second blocking plate 320 on the first blocking plate 310, so that the second blocking plate 320 can be pushed to rotate while achieving the positioning and blocking of the wheel hub, so that the proximity switch 330 detects the rotation of the second blocking plate 320 and determines that the wheel hub has reached the pause position S, and controls the corresponding second conveying roller 510 to stop, so as to avoid scratching the wheel hub. Thereafter, the first blocking plate 310 is driven up and down by the fifth drive cylinder 370, so that the first blocking plate 310 leaves the position corresponding to the wheel hub on the second conveying roller 510. Then, based on the proximity switch 330 detecting that the wheel hub has reached the pause station S, the control mechanism can control the marker 530 to work and mark the wheel hub according to the detection results of the runout or dynamic balancing process. In addition, according to the detection results of the runout or dynamic balancing process, when the wheel hub is considered to be an unqualified product, no marking is performed, and the wheel hub is moved in a direction perpendicular to the conveying direction of the second conveyor roller 510 by the push plate, and then moved to the unloading roller to be conveyed to the scrap station. When the wheel hub is considered to be a qualified product, after the marking is completed and there is no wheel hub at the station of the next process, the second conveyor roller 510 conveys the wheel hub to the next process.

[0115] Note that the above are only preferred embodiments of the present application and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present application is described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may also include more other equivalent embodiments without departing from the concept of the present invention, all of which belong to the protection scope of the present invention.

Claims

1. A wheel hub runout measuring device, characterized in that: It includes a moving mechanism, a detection mechanism, a spindle mechanism, a conveying mechanism and a centering mechanism. The detection mechanism is arranged on the moving mechanism. The moving mechanism drives the detection mechanism to move to the detection position to detect the wheel hub at the detection position. The spindle mechanism includes a spindle, and the spindle is used to drive the wheel hub to rotate. The detection mechanism includes: a first mounting member, the first mounting member being mounted on the moving mechanism and being movable by the moving mechanism, the first mounting member being provided with a slide rail along the radial direction of the hub, and limiting portions being provided at both ends of the slide rail; a second mounting member, the second mounting member being slidably connected to the slide rail; a first sensor, which is fixed to a limiting portion of the first mounting member on a side away from the wheel hub by means of screws, abuts against the second mounting member, and detects displacement of the second mounting member; a detection arm, the detection arm extending in the radial direction of the wheel hub, being hinged to the second mounting member at the middle position thereof, and swinging along the axial direction of the wheel hub with an axis perpendicular to the axial direction of the wheel hub as the center; the first sensor is located in the space between the first mounting member and the detection arm, and the first sensor overlaps with the detection arm when viewed along the swing axis direction of the detection arm, and a notch is provided on the detection arm for avoiding the screw; A second sensor, wherein the second sensor is disposed on the second mounting member, is located at a position corresponding to one end of the detection arm away from the wheel hub, abuts against the detection arm, and detects a rotation amplitude of the detection arm; A measuring head, the measuring head is arranged on the detection arm, located at one end of the detection arm facing the wheel hub, and is used to abut against the wheel hub; an elastic member, the elastic member being arranged on the first mounting member to push the second mounting member away from the first sensor, and / or the elastic member being arranged on the second mounting member to push the detection arm away from the second sensor; a probe pin, wherein the probe pin is made of cemented carbide, the probe pin is arranged on the second mounting member, is detachably connected to the second mounting member, is located at a position corresponding to the first sensor and abuts against the first sensor, and / or the probe pin is arranged on the detection arm, is detachably connected to the detection arm, is located at a position corresponding to the second sensor and abuts against the second sensor; The elastic member is a spring, which is sleeved on the first sensor and the probe pin corresponding to the first sensor, and / or, is sleeved on the second sensor and the probe pin corresponding to the second sensor; The conveying mechanism comprises: Conveyor belts, two of which are arranged in parallel on both sides of the main shaft, and are used to drive the wheel hub to move in a horizontal direction so that the wheel hub moves above the main shaft; A first driving cylinder, the first driving cylinder is connected to the conveyor belt and drives the conveyor belt to move up and down; The centering mechanism comprises: A centering roller, wherein a plurality of centering rollers are provided, and the plurality of centering rollers are vertically arranged above the main shaft and arranged around the main shaft; The second driving cylinder is connected to the centering rollers in a transmission manner and drives the centering rollers to move toward the axis of the main shaft.

2. The wheel hub runout measuring device according to claim 1, characterized in that: The detection mechanisms are provided in plurality, and the measuring heads of the plurality of detection mechanisms abut against the wheel hub at different positions.

3. The wheel hub runout measuring device according to any one of claims 1 or 2, characterized in that: The detection mechanism also includes: A limit member, wherein the limit member is arranged on the first mounting member, and when the second mounting member slides to a predetermined position, the limit member abuts against the second mounting member, and / or the limit member is arranged on the second mounting member, and when the detection arm rotates to a predetermined position, the limit member abuts against the detection arm.

4. The wheel hub runout measuring device according to claim 1, characterized in that: The moving mechanism comprises: A first slide rail, the first slide rail extending horizontally; a second slide rail, the second slide rail extending in a vertical direction, the second slide rail being arranged on the first slide rail and being slidably connected to the first slide rail, and the first mounting member being arranged on the second slide rail and being slidably connected to the second slide rail; a first driving motor, the first driving motor being drivingly connected to the second slide rail, driving the second slide rail to slide along the first slide rail; A second driving motor is drivingly connected to the first mounting member to drive the first mounting member to slide along the second slide rail.

5. A wheel hub measuring device, characterized in that: include: A wheel hub runout measuring device, wherein the wheel hub runout measuring device is the wheel hub runout measuring device according to any one of claims 1 to 4; A wheel hub dynamic balancing measuring device is used to measure the dynamic balance of the wheel hub.

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