Play measuring mechanism

Abstract

The present disclosure relates to the technical field of bearing assembly, in particular to a clearance measuring mechanism. The clearance measuring mechanism comprises a feeding mechanism, a clamping mechanism, a first pushing mechanism and a second pushing mechanism. The clamping mechanism is used for clamping two ends of the inner shaft. The first pushing mechanism and the second pushing mechanism are respectively located at two ends of the bearing in the radial direction. The first pushing mechanism comprises a first driving member, a first abutting member and a first spring. The first abutting member is used for abutting with the outer ring. The first spring is arranged between the output end of the first driving member and the first abutting member. The second pushing mechanism comprises a second driving member, a distance sensor and a second abutting member. The output end of the second driving member is connected with the second abutting member. The distance sensor is arranged on the second abutting member. The clearance measuring mechanism can replace manual measurement, and greatly improves the production efficiency.

Description

Technical Field

[0001] This disclosure relates to the field of bearing assembly technology, and in particular to a clearance measuring mechanism. Background Technology

[0002] Radial clearance refers to the clearance of a bearing in the radial direction, that is, the relative displacement between the inner and outer rings of the bearing in the radial direction perpendicular to the axis.

[0003] The process of testing bearing clearance involves simultaneously using equipment such as dial indicators to measure the displacement of the outer or inner ring while applying forces in different directions to the inner and outer rings. The bearing clearance is then determined based on the relative displacement between the inner and outer rings. This testing process is manual, time-consuming, and labor-intensive. Summary of the Invention

[0004] This disclosure provides a clearance measuring mechanism to at least solve the above-mentioned technical problems existing in the prior art.

[0005] This disclosure provides a clearance measuring mechanism for measuring bearing clearance, wherein the bearing includes an inner shaft and an outer ring, and includes: a feeding mechanism, a clamping mechanism, a first pushing mechanism, and a second pushing mechanism; The feeding mechanism includes a robotic arm and a material conveying track. The robotic arm is used to grab the bearing from the material conveying track and place the inner shaft into the clamping mechanism. The clamping mechanism is used to clamp both ends of the inner shaft. The first pushing mechanism and the second pushing mechanism are respectively located at both ends of the bearing in the radial direction. The first pushing mechanism includes a first driving member, a first abutting member, and a first spring. The first abutting member is used to abut against the outer ring. A first spring is provided between the output end of the first driving member and the first abutting member. The second pushing mechanism includes a second driving member, a distance sensor, and a second abutting member. The output end of the second driving member is connected to the second abutting member. The distance sensor is disposed on the second abutting member.

[0006] Furthermore, the first abutting member includes a movable plate and a first guide post, wherein the movable plate is disposed at the output end of the first driving member; The first guide post is connected to the moving plate via a buffer assembly.

[0007] Furthermore, the buffer assembly includes a first baffle, a second baffle, a first positioning element, a second positioning element, and a first spring; Both the first baffle and the second baffle are disposed on the movable plate, and the first baffle and the second baffle are spaced apart. The first baffle is provided with a first guide hole, and the second baffle is provided with a second guide hole. The first guide post is slidably disposed in the first guide hole and the second guide hole. Both the first positioning member and the second positioning member are disposed on the guide post and are fixed to the guide post. The first positioning member is disposed between the first baffle and the second baffle, and the second baffle is disposed between the first positioning member and the second positioning member. The first spring is sleeved on the guide post, and both ends of the first spring abut against the first positioning member and the second baffle, respectively.

[0008] Furthermore, it also includes a drive mechanism for driving the outer ring to rotate.

[0009] Furthermore, the drive mechanism includes a first motor, the output end of which is connected to the drive wheel; The drive wheel is used to drive the outer ring to rotate when it comes into contact with the outer ring.

[0010] Furthermore, the drive mechanism also includes a guide rail, a guide block, and a drive cylinder. The guide block is slidably engaged with the guide rail, the telescopic end of the drive cylinder is connected to the guide block, and the first motor is disposed on the guide block.

[0011] Furthermore, there are two clamping mechanisms, which are located at both ends of the inner shaft of the bearing.

[0012] Furthermore, the clamping mechanism includes a first clamping plate, a second clamping plate, and a second cylinder. The first clamping plate and the second clamping plate are arranged opposite to each other, and the second cylinder is connected to one of the first clamping plate and the second clamping plate for clamping or releasing the inner shaft of the bearing.

[0013] Furthermore, both the first clamping plate and the second clamping plate have elastic buffer layers on their contact surfaces for contacting the inner shaft of the bearing.

[0014] The technical solution provided in this disclosure has the following advantages compared with the prior art: The clearance measuring mechanism disclosed herein is used to measure bearing clearance. The bearing includes an inner shaft and an outer ring. The clearance measuring mechanism includes: a feeding mechanism, a clamping mechanism, a first pushing mechanism, and a second pushing mechanism. The clamping mechanism is used to clamp both ends of the inner shaft. By clamping both ends of the inner shaft, the clamping mechanism can be adapted to bearings with different inner diameter specifications, eliminating the need for frequent changes of tooling fixtures and reducing debugging costs. The clamping mechanism can be composed of grippers whose opening and closing are controlled by a cylinder.

[0015] The first and second pushing mechanisms are located at opposite ends of the bearing's radial direction. The contact surfaces of the first and second abutting members can be customized according to the outer ring size, expanding the device's application range. The first pushing mechanism includes a first driving member, a first abutting member, and a first spring. The first abutting member is used to abut against the outer ring, and a first spring is provided between the output end of the first driving member and the first abutting member. The second pushing mechanism includes a second driving member, a distance sensor, and a second abutting member. The output end of the second driving member is connected to the second abutting member, and the distance sensor is located on the second abutting member. A first or second measuring station is formed between the first and second abutting members. The first spring in the first pushing mechanism can buffer the pressure of the first abutting member on the outer ring, avoiding deformation of the outer ring or measurement deviation caused by rigid contact; at the same time, the elastic force of the first spring can always maintain close contact between the first abutting member and the outer ring to accommodate the tolerance range of different bearing specifications. The second driving component drives the second abutting component, causing the second abutting component to move the outer ring radially relative to the inner shaft. The second pushing mechanism monitors the outer ring displacement in real time through a distance sensor. Combined with the precise control of the second driving component, this enables digital acquisition of the clearance value, reducing errors from manual readings. The distance sensor converts the outer ring displacement data into an electrical signal, which is then used by the control system to calculate the clearance value in real time and generate a measurement report.

[0016] The clearance measuring mechanism provided in this embodiment can replace manual operation, improving measurement accuracy and efficiency while meeting the high-precision and high-efficiency quality inspection requirements in industrial production.

[0017] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of this disclosure, nor is it intended to limit the scope of this disclosure. Other features of this disclosure will become readily apparent from the following description. Attached Figure Description

[0018] The above and other objects, features, and advantages of this disclosure will become readily apparent from the following detailed description of exemplary embodiments, taken in conjunction with the accompanying drawings. Several embodiments of this disclosure are illustrated in the drawings by way of example and not limitation, in which: In the accompanying drawings, the same or corresponding reference numerals indicate the same or corresponding parts.

[0019] Figure 1 A schematic diagram of the clearance measuring mechanism provided in an embodiment of this disclosure is shown. Figure One ; Figure 2 A schematic diagram of the clearance measuring mechanism provided in an embodiment of this disclosure is shown. Figure Two .

[0020] The following are the labels in the diagram: 101, inner shaft; 102, outer ring; 41, clamping mechanism; 411, first clamping plate; 412, second cylinder; 42, first driving component; 43, first abutting component; 431, moving plate; 432, first guide post; 433, first baffle; 434, second baffle; 435, first positioning component; 436, second positioning component; 44, first spring; 45, second driving component; 46, distance sensor; 47, second abutting component; 481, guide rail; 482, guide block; 483, first motor; 484, drive wheel; 485, drive air spring. Detailed Implementation To make the objectives, features, and advantages of this disclosure more apparent and understandable, the technical solutions in the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this disclosure, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0021] Combination Figure 1 and Figure 2 As shown, the clearance measuring mechanism provided in this disclosure includes: a feeding mechanism, a clamping mechanism 41, a first pushing mechanism, and a second pushing mechanism.

[0022] The loading mechanism includes a robotic arm and a material conveying track. The robotic arm is used to grab the bearing from the material conveying track and place the inner shaft 101 into the clamping mechanism 41. The clamping mechanism 41 is used to clamp both ends of the inner shaft 101. By clamping both ends of the inner shaft 101, the clamping mechanism 41 can accommodate bearings with different inner diameter specifications, eliminating the need for frequent changes of tooling fixtures and reducing debugging costs. The clamping mechanism can be composed of grippers that are controlled to open and close by a cylinder.

[0023] The first and second pushing mechanisms are located at opposite ends of the bearing's radial direction. The contact surfaces of the first abutment 43 and the second abutment 47 can be customized according to the dimensions of the outer ring 102, expanding the device's application range. The first pushing mechanism includes a first driving member 42, a first abutment 43, and a first spring 44. The first abutment 43 abuts against the outer ring 102. The first spring 44 is located between the output end of the first driving member 42 and the first abutment 43. The second pushing mechanism includes a second driving member 45, a distance sensor 46, and a second abutment 47. The output end of the second driving member 45 is connected to the second abutment 47, and the distance sensor 46 is located on the second abutment 47. A first measuring station or a second measuring station is formed between the first abutment 43 and the second abutment 47. The first spring 44 in the first pushing mechanism can buffer the pressure of the first abutment 43 on the outer ring 102, avoiding deformation or measurement deviation of the outer ring 102 caused by rigid contact. Simultaneously, the elastic force of the first spring 44 can maintain close contact between the first abutment 43 and the outer ring 102 to accommodate the tolerance range of different bearing specifications. The second driving member 45 drives the second abutment 47, causing the second abutment 47 to move the outer ring 102 radially relative to the inner shaft 101. The second pushing mechanism monitors the displacement of the outer ring 102 in real time through the distance sensor 46. Combined with the precise control of the second driving member 45, it can achieve digital acquisition of the clearance value, reducing errors from manual readings. The distance sensor 46 can convert the displacement data of the outer ring 102 into an electrical signal, which is then used by the control system to calculate the clearance value in real time and generate a measurement report.

[0024] The robotic arm, which can also be a robotic hand, can automatically pick up bearings from the material conveying track according to a preset program and accurately place the inner shaft 101 into the clamping mechanism 41, eliminating the need for manual placement. This avoids positioning deviations that may occur during manual operation, reduces measurement errors caused by improper placement, lowers labor costs, and makes the measurement process more efficient and stable. The material conveying track enables continuous transport of bearings. The material conveying track can be a track drive, a conveyor belt and pulley drive, or a sprocket and chain drive. The robotic arm works in conjunction with this track for continuous feeding, seamlessly integrating with the automated measurement process of the clearance measurement mechanism. This meets the demand for rapid bearing clearance detection in industrial mass production, significantly improving the overall production rhythm and efficiency, and avoiding the interruptions and speed limitations of manual feeding.

[0025] The clearance measuring mechanism provided in this embodiment can replace manual operation, improving measurement accuracy and efficiency while meeting the high-precision and high-efficiency quality inspection requirements in industrial production.

[0026] In some specific embodiments, the first abutment member 43 includes a movable plate 431 and a first guide post 432. The movable plate 431 is disposed at the output end of the first drive member 42. The first guide post 432 and the movable plate 431 are connected by a buffer assembly. The buffer assembly can maintain the stability of the abutment force and ensure the consistency of the measurement data.

[0027] Combination Figure 1 and Figure 2 As shown, the first abutting member 43 includes a movable plate 431 and a first guide post 432, with the movable plate 431 disposed at the output end of the first driving member 42; The movable plate 431 is provided with a first baffle 433 and a second baffle 434, which are spaced apart. The first baffle 433 has a first guide hole, and the second baffle 434 has a second guide hole. The first guide post 432 is slidably disposed in the first guide hole and the second guide hole. The first baffle 433 and the second baffle 434 are spaced apart on the movable plate 431 and have the first guide hole and the second guide hole respectively, forming a double guide constraint on the first guide post 432. This design can effectively suppress the swaying or shaking of the guide post during the movement process, ensure the accuracy of the contact position of the first abutting member 43 against the outer ring 102, and avoid measurement errors caused by guide deviation.

[0028] The guide post is provided with a first positioning element 435 and a second positioning element 436, both of which are fixed to the guide post. The first positioning element 435 is disposed between a first baffle 433 and a second baffle 434, and the second baffle 434 is disposed between the first positioning element 435 and the second positioning element 436. A first spring 44 is sleeved on the guide post, and its two ends abut against the first positioning element 435 and the second baffle 434, respectively. By limiting the axial movement range of the first guide post 432 through the first positioning element 435 and the second positioning element 436, and in conjunction with the elastic force of the first spring 44, dynamic positioning of the first guide post 432 in the first abutment 43 can be achieved.

[0029] When the first driving member 42 pushes the moving plate 431, the elastic force of the first spring 44 can be converted into the abutting force of the first guide post 432 against the outer ring 102. On the one hand, it can avoid surface damage or deformation of the outer ring 102 caused by rigid contact, which is especially suitable for the measurement of high-precision bearings; on the other hand, even if there is radial runout or surface roughness difference in the bearing outer ring 102, the elastic deformation of the first spring 44 can maintain the stability of the abutting force and ensure the consistency of measurement data. For bearings of the same model but different batches, even if there is a deviation in the outer diameter of the outer ring 102, the first guide post 432 can still achieve effective contact through the deformation of the first spring 44 without manual intervention.

[0030] Both the first driving component 42 and the second driving component 45 can be cylinders.

[0031] In some specific embodiments, a drive mechanism for driving the outer ring 102 to rotate is also included. The drive mechanism includes a guide rail 481, a guide block 482, a drive cylinder 485, a first motor 483, and a drive wheel 484. The guide block 482 is slidably engaged with the guide rail 481, which extends along the third direction Z. The telescopic end of the drive cylinder 485 is connected to the guide block 482. The first motor 483 is disposed on the guide block 482, and its output end is connected to the drive wheel 484. The drive wheel 484 is used to drive the outer ring 102 to rotate when it abuts against the outer ring 102. The height direction of the clearance measuring mechanism is also specified in the third direction Z.

[0032] The extension and retraction of the drive cylinder 485 can be precisely controlled by the air pressure valve to ensure that the drive wheel 484 fits against the outer ring with appropriate pressure. The drive cylinder 485 can adjust the contact pressure between the drive wheel 484 and the outer ring 102 by pushing the guide block 482 to slide along the guide rail 481 (Z direction).

[0033] The outer ring 102 is driven to rotate by a drive mechanism, enabling clearance measurement at multiple points along the bearing's circumference. For example, by measuring the clearance every 30°, a circumferential clearance distribution curve can be plotted to determine if the bearing has issues such as excessive ellipticity or inconsistent ball dimensions.

[0034] In some specific embodiments, there are two clamping mechanisms 41, which are located at both ends of the inner shaft of the bearing. They can evenly offset the axial force, prevent the inner shaft from shifting or bending due to unilateral force, and ensure the stability of the bearing system under high-speed operation or heavy load conditions.

[0035] In some specific embodiments, the clamping mechanism includes a first clamping plate 411, a second clamping plate, and a second cylinder 412. The first clamping plate 411 and the second clamping plate are arranged opposite each other. The structure of the first clamping plate 411 and the second clamping plate being arranged opposite each other occupies little axial space, and the relative planes of the two clamping plates can form a large-area contact with the cylindrical surface of the bearing inner shaft. The second cylinder 412 is connected to one of the first clamping plate and the second clamping plate and is used to clamp or release the bearing inner shaft. The second cylinder 412 provides clamping force through pneumatic transmission, and the clamping force can be precisely controlled by adjusting the air pressure value to avoid deformation or damage to the bearing inner shaft caused by rigid clamping.

[0036] In some specific embodiments, both the first clamping plate 411 and the second clamping plate have elastic buffer layers on their contact surfaces with the inner shaft of the bearing. The elastic buffer layers can be made of materials such as polyurethane, and their flexibility effectively alleviates the rigid contact between the clamping plates and the inner shaft. When the second cylinder drives the clamping plates to clamp the inner shaft, the buffer layer absorbs part of the clamping force, preventing scratches, indentations, or deformation caused by the clamping plates directly pressing against the surface of the inner shaft. This is particularly suitable for protecting the inner shaft of bearings with high surface precision requirements.

[0037] In some specific embodiments, a dust cover is also included. The dust cover is set outside the measuring mechanism to prevent dust and other impurities from entering the measuring mechanism and affecting the measurement accuracy. The dust cover is made of transparent acrylic material, which makes it easy to observe the working status of the measuring mechanism. Its opening and closing method is sliding, which is convenient to operate.

[0038] It should be understood that the various forms of processes shown above can be used to reorder, add, or delete steps. For example, the steps described in this invention disclosure can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution disclosed in this embodiment can be achieved, and this is not limited herein.

[0039] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this disclosure, "a plurality of" means two or more, unless otherwise explicitly specified.

[0040] The above are merely specific embodiments of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A clearance measuring mechanism for measuring the clearance of a bearing (10), the bearing (10) comprising an inner shaft (101) and an outer ring (102), characterized in that, include: Feeding mechanism, clamping mechanism (41), first pushing mechanism and second pushing mechanism; The feeding mechanism includes a robotic arm and a material conveying track. The robotic arm is used to grab the bearing from the material conveying track and place the inner shaft (101) into the clamping mechanism (41). The clamping mechanism (41) is used to clamp the two ends of the inner shaft (101). The first pushing mechanism and the second pushing mechanism are respectively located at the two ends of the radial direction of the bearing (10). The first pushing mechanism includes a first driving member (42), a first abutting member (43) and a first spring (44). The first abutting member (43) is used to abut against the outer ring (102). The first spring (44) is provided between the output end of the first driving member (42) and the first abutting member (43). The second pushing mechanism includes a second driving member (45), a distance sensor (46) and a second abutting member (47). The output end of the second driving member (45) is connected to the second abutting member (47). The distance sensor (46) is disposed on the second abutting member (47).

2. The clearance measuring mechanism according to claim 1, characterized in that, The first abutting member (43) includes a movable plate (431) and a first guide post (432), wherein the movable plate (431) is disposed at the output end of the first driving member (42); The first guide post (432) is connected to the movable plate (431) via a buffer assembly.

3. The clearance measuring mechanism according to claim 2, characterized in that, The buffer assembly includes a first baffle (433), a second baffle (434), a first positioning member (435), a second positioning member (436), and a first spring (44); The first baffle (433) and the second baffle (434) are both disposed on the movable plate (431). The first baffle (433) and the second baffle (434) are spaced apart. The first baffle (433) is provided with a first guide hole, and the second baffle (434) is provided with a second guide hole. The first guide post (432) is slidably disposed in the first guide hole and the second guide hole. The first positioning member (435) and the second positioning member (436) are both disposed on the guide post. The first positioning member (435) and the second positioning member (436) are both fixed to the guide post. The first positioning member (435) is disposed between the first baffle (433) and the second baffle (434). The second baffle (434) is disposed between the first positioning member (435) and the second positioning member (436). The first spring (44) is sleeved on the guide post, and the two ends of the first spring (44) abut against the first positioning member (435) and the second baffle (434) respectively.

4. The clearance measuring mechanism according to claim 1, characterized in that, It also includes a drive mechanism for driving the outer ring (102) to rotate.

5. The clearance measuring mechanism according to claim 4, characterized in that, The drive mechanism includes a first motor (483), the output end of which is connected to the drive wheel (484); The drive wheel (484) is used to drive the outer ring (102) to rotate when it comes into contact with the outer ring (102).

6. The clearance measuring mechanism according to claim 5, characterized in that, The drive mechanism further includes a guide rail (481), a guide block (482), and a drive cylinder (485). The guide block (482) is slidably engaged with the guide rail (481). The telescopic end of the drive cylinder (485) is connected to the guide block (482). The first motor (483) is disposed on the guide block (482).

7. The clearance measuring mechanism according to claim 1, characterized in that, The number of clamping mechanisms (41) is two, and the two clamping mechanisms (41) are located at both ends of the inner shaft of the bearing.

8. The clearance measuring mechanism according to claim 7, characterized in that, The clamping mechanism includes a first clamping plate (411), a second clamping plate, and a second cylinder (412). The first clamping plate (411) and the second clamping plate are arranged opposite to each other, and the second cylinder (412) is connected to one of the first clamping plate and the second clamping plate for clamping or releasing the inner shaft of the bearing.

9. The clearance measuring mechanism according to claim 8, characterized in that, Both the first clamping plate (411) and the second clamping plate have elastic buffer layers on their contact surfaces for contacting the inner shaft.

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