Wheel bolt pre-tightening and measuring tool for wheel bolt fastening test

Abstract

The invention relates to a wheel bolt pre-tightening and measuring tool for a wheel bolt fastening test. The wheel bolt pre-tightening and measuring tool comprises an annular support and a plurality of bolt pre-tightening assemblies. The number of the bolt pre-tightening assemblies is the same as that of wheel bolts on wheels. Each bolt pre-tightening assembly comprises a driving device, a bolt sleeve and a sensor, and the driving devices are fixed to the annular support and drive the bolt sleeves. The sensor measures a real-time torque and a rotation angle. And the rotating centers of the plurality of bolt sleeves are uniformly distributed on the same circumference. Preferably, a plurality of radial sliding blocks are arranged on the annular support, the annular support is rotationally connected with the linkage ring, matched threads are correspondingly arranged on the linkage ring and the radial sliding blocks respectively, and the linkage ring is rotated to drive the radial sliding blocks to slide synchronously. During working, all the bolt pre-tightening assemblies act simultaneously, that is, pre-tightening and measurement of all bolts of the same wheel are performed simultaneously, so that the influence of human factors and tool limitation on test results in a wheel bolt fastening test is avoided or reduced.

Description

Technical Field

[0001] The invention relates to the technical field of wheel bolt tightening test, and in particular to a wheel bolt pre-tightening and measuring tool. Background Art

[0002] Wheel bolt tightening test is related to the safety of the whole vehicle. In the current wheel bolt tightening test, a universal torque wrench that can measure real-time torque and rotation angle is used. Using this universal torque wrench will result in differences in the tightening and measurement process of different bolts on the same wheel, and differences in pre-tightening and measurement data due to different measurement personnel during manual pre-tightening. The test results will be affected by human factors and tool limitations (operators can only pre-tighten bolts one by one).

[0003] In view of the above problems, the inventors of the present invention finally obtained the present invention after a long period of research and practice. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a wheel bolt pre-tightening and measuring tool for a wheel bolt tightening test, which avoids or reduces the influence of human factors and tool limitations on the test results in the wheel bolt tightening test.

[0005] The technical solution adopted by the present invention is:

[0006] Provided is a wheel bolt pre-tightening and measuring tool for a wheel bolt tightening test, comprising an annular bracket and a plurality of bolt pre-tightening assemblies; the number of the bolt pre-tightening assemblies is the same as the number of wheel bolts on the wheel;

[0007] Each of the bolt pre-tightening assemblies comprises a driving device, a bolt sleeve and a sensor, wherein the driving device is fixed on the annular bracket, the driving end of the driving device is drivingly connected to the bolt sleeve, and the sensor is used to measure the real-time torque and rotation angle of the bolt sleeve during operation;

[0008] The rotation centers of the multiple bolt sleeves are evenly distributed on the same circumference.

[0009] Furthermore, the annular bracket includes an annular frame body and a plurality of radial sliders; the number of the radial sliders is the same as the number of the bolt pre-tightening assemblies, and the radial sliders correspond to the bolt pre-tightening assemblies one by one, the annular frame body is evenly provided with a plurality of radial slide grooves, and a radial slider is slidably installed in each radial slide groove; the driving device is fixedly installed on the radial slider.

[0010] Furthermore, a locking mechanism is provided on the radial slider, and the locking mechanism is used to lock and release the position of the radial slider relative to the radial sliding groove.

[0011] Furthermore, it also includes a linkage ring, which is rotatably connected to the annular frame; the linkage ring and the radial slider are respectively provided with matching threads, and when the linkage ring rotates, the threads drive the radial sliders to synchronously slide radially along their corresponding radial grooves.

[0012] Furthermore, the linkage ring is located below the annular frame, the upper end surface of the linkage ring is provided with an annular plane thread, and the lower end surface of the radial sliding block is provided with a corresponding thread groove.

[0013] Furthermore, corresponding scale lines are provided on the radial slider and the annular frame, for indicating the diameter of the circle where the rotation center of the bolt sleeve corresponds to the position of the radial slider.

[0014] Furthermore, the wheel bolt pre-tightening and measuring tool also includes a controller, and the controller is electrically connected to the driving device and the sensor respectively.

[0015] Wheel bolt pre-tightening and measuring tool, the controller controls the drive device based on working parameters and / or relevant curves of these working parameters; the working parameters include real-time torque, rotation angle, rotation speed, working time, and target torque.

[0016] A wheel bolt pre-tightening and measuring tool, wherein the driving device is a pneumatic rotary cylinder.

[0017] A wheel bolt pre-tightening and measuring tool, wherein the driving device is a motor.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] The wheel bolt pre-tightening and measuring tool of the present invention can avoid the difference in the wheel bolt tightening process caused by different tightening sequences of the wheel bolts, and avoid the difference caused by manual pre-tightening and measurement. Compared with pneumatic drive, the motor drive has a single and simple power source, and can be battery-driven to form a portable device; pneumatic drive can more easily achieve a larger pre-tightening / measurement torque. The bolt pre-tightening assembly can be adjusted independently or in conjunction, and is suitable for wheels of all specifications and structures. That is, by adjusting the circumference of the distribution of the bolt pre-tightening assembly, it can adapt to wheels with different concentric circles where the bolts are located. For wheels with different numbers of bolts, a tool with a corresponding number of bolt pre-tightening assemblies can be made. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 A schematic structural diagram of a wheel bolt pre-tightening and measuring tool according to an embodiment of the present invention is shown;

[0022] Figure 2 A schematic structural diagram of a radial slider according to an embodiment of the present invention is shown;

[0023] Figure 3 A schematic structural diagram of a linkage ring according to an embodiment of the present invention is shown. DETAILED DESCRIPTION

[0024] The above and other technical features and advantages of the present invention are described in more detail below in conjunction with the accompanying drawings.

[0025] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0026] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0028] like Figure 1 As shown, a wheel bolt pre-tightening and measuring tool for wheel bolt tightening test is provided, including an annular bracket 1 and a plurality of bolt pre-tightening assemblies. The number of bolt pre-tightening assemblies is the same as the number of wheel bolts on the wheel. Each bolt pre-tightening assembly includes a driving device 3, a bolt sleeve 4 and a sensor (not shown in the figure). The driving device 3 is fixed on the annular bracket 1. The driving end of the driving device 3 drives the connecting bolt sleeve 4. The bolt sleeve 4 cooperates with the wheel bolt to pre-tighten the wheel bolt. The sensor is used to measure the real-time torque and rotation angle of the bolt sleeve during operation. The rotation centers of the plurality of bolt sleeves 4 are evenly distributed on the same circumference, and the circle where the rotation center of the bolt sleeve 4 is located has the same radius as the circle where the center of the bolt on the wheel is located.

[0029] When the wheel bolt pre-tightening and measuring tool is working, all bolt pre-tightening components act at the same time, that is, the pre-tightening and measurement of all bolts of the same wheel are carried out at the same time, and the torque and rotation angle of each bolt sleeve 4 during the working process can be measured in real time, so as to avoid the difference in the wheel bolt tightening process caused by different tightening sequences, and avoid the difference caused by manual pre-tightening and measurement. Preferably, a handle portion 11 is formed on the annular bracket 1, which is used for the operator to hold the tool and align the wheel bolts during the working process. It can be understood that each sensor can be integrated on the corresponding bolt sleeve 4 or integrated on the corresponding drive device 3 or installed on the annular bracket 1, and is separately connected to the bolt sleeve 4 and / or its drive device 3 to realize the torque measurement and rotation angle measurement functions. Those skilled in the art can design it according to the needs.

[0030] In some embodiments, on the basis of the above scheme, the annular bracket 1 includes an annular frame body and a plurality of radial sliders 2. The number of radial sliders 2 is the same as the number of bolt pre-tightening assemblies, and the radial sliders 2 correspond to the bolt pre-tightening assemblies one by one. The annular frame body 1 is evenly provided with a plurality of radial slide grooves, and a radial slider 2 is slidably installed in each radial slide groove. The driving device 3 is fixedly installed on the radial slider 2, and the driving end of the driving device 3 passes through the driving hole 23 on the radial slider 2 and is connected to the bolt sleeve 4. A locking mechanism is provided on the radial slider 2, and the locking mechanism is used to lock and release the position of the radial slider 2 relative to the radial slide groove. Preferably, the driving device 3 and the bolt sleeve 4 are installed on the inner side of the annular bracket 1.

[0031] It is understandable that each bolt pre-tightening assembly is fixed on a radial slider 2, each radial slider 2 is installed in a radial slide groove, and the radial slide groove is formed on the annular frame. Each radial slider 2 can slide independently along a straight line in the radial slide groove. The sliding direction is the radius direction of the concentric circle corresponding to the wheel bolt position where the rotation center of the bolt sleeve 4 is located, and the range of movement is the range of variation of the radius of the concentric circle where the wheel bolt is located. The radial slide groove can be marked with scales to facilitate the position adjustment of each bolt pre-tightening assembly. Each radial slider 2 has an independent locking mechanism 5. After sliding to the working position, the radial slider 2 can be locked and fixed on the annular frame to keep the relative position fixed. Preferably, the locking mechanism 5 is a locking pin, and the radial slider 2 is provided with a pin hole 22, and the annular frame is also provided with a corresponding pin hole. When the radial slider 2 slides to the scale position, the locking pin is inserted into the pin hole for positioning. It is understandable that the locking mechanism 5 can also adopt other forms of locking structures, such as bolt locking, setting a buckle structure, etc., and those skilled in the art can design according to needs. The slider structure has a wider application range and can be applied to a variety of wheels with the same number of wheel bolts but different radii of the concentric circles where the wheel bolts are located.

[0032] like Figure 1~Figure 3As shown, in some embodiments, on the basis of the above scheme, the wheel bolt pre-tightening and measuring tool further includes a linkage ring 6, which is rotatably connected to the annular frame, and the linkage ring 6 and the radial slider 2 are respectively provided with matching threads. When the linkage ring rotates, the threads drive each radial slider to synchronously slide radially along its corresponding radial slide groove. Specifically, the linkage ring is located below the annular frame, and the upper end surface of the linkage ring 6 is provided with an annular plane thread 61, and the lower end surface of the radial slider 2 is provided with a corresponding thread groove 21. This structure can make each radial slider 2 slide synchronously and self-centering, that is, ensure that the rotation center of each bolt sleeve 4 is always on the same circle, greatly increasing the convenience and accuracy of operation. It should be noted that the rotatable connection between the linkage ring 6 and the annular frame can be realized by a variety of connection structures, for example, a circle of slide grooves with a buckle structure are provided on the annular frame along the circumferential direction, and a circular slide rail structure with a snap-fit ​​structure is correspondingly provided on the linkage ring 6, and the circular slide rail structure and the slide groove are slidably matched to form a buckle structure, thereby realizing the rotation connection. For another example, the outer circumference of the linkage ring 6 and the annular frame is installed with a U-shaped clamp to limit the horizontal and longitudinal position between the two, and a ball and a ball groove are arranged between the linkage ring 6 and the annular frame, similar to a bearing structure, so as to achieve a rotation connection. Those skilled in the art can design according to needs, which will not be repeated here.

[0033] In some embodiments, based on the above scheme, the wheel bolt pre-tightening and measuring tool further includes a controller (not shown in the figure), which is electrically connected to the drive device 3 and the sensor. The controller can control the start and stop, rotation direction and speed of the drive device 3 according to the settings; these settings can be based on torque, speed, angle, time, target torque and related curves composed of these parameters, and the setting operation can be realized through an integrated operation panel and / or a host computer to feedback control the drive device.

[0034] In some embodiments, the driving device 3 is a pneumatic rotary cylinder (pneumatic motor), which is controlled by a valve and its driving circuit. The on-off and flow rate of the valve can be controlled according to the settings to control the start and stop, rotation direction and speed of the pneumatic rotary cylinder (pneumatic motor); pneumatic drive can more easily achieve a larger preload / measurement torque.

[0035] In some embodiments, the driving device 4 is a motor, which is controlled by a driving circuit and can control the start and stop, rotation direction and speed of the motor according to settings. The motor driving power source is single and simple and can be driven by a battery to form a portable device.

[0036] The above are only preferred embodiments of the present invention, which are only illustrative and not restrictive. The structures and connection modes of the components in the present invention can be changed, and any equivalent transformations and improvements based on the technical solution of the present invention should not be excluded from the protection scope of the present invention.

Claims

1. A wheel bolt pre-tightening and measuring tool for wheel bolt tightening test, characterized in that: It comprises an annular bracket and a plurality of bolt pre-tightening assemblies; the number of the bolt pre-tightening assemblies is the same as the number of wheel bolts on the wheel; Each of the bolt pre-tightening assemblies comprises a driving device, a bolt sleeve and a sensor, wherein the driving device is fixed on the annular bracket, the driving end of the driving device is drivingly connected to the bolt sleeve, and the sensor is used to measure the real-time torque and rotation angle of the bolt sleeve during operation; The rotation centers of the multiple bolt sleeves are evenly distributed on the same circumference.

2. A wheel bolt pre-tightening and measuring tool for wheel bolt tightening test according to claim 1, characterized in that: The annular bracket includes an annular frame body and a plurality of radial sliders; the number of the radial sliders is the same as the number of the bolt pre-tightening assemblies, and the radial sliders correspond to the bolt pre-tightening assemblies one by one, the annular frame body is evenly provided with a plurality of radial slide grooves, and a radial slider is slidably installed in each radial slide groove; the driving device is fixedly installed on the radial slider.

3. A wheel bolt pre-tightening and measuring tool for wheel bolt tightening test according to claim 2, characterized in that: The radial slider is provided with a locking mechanism, and the locking mechanism is used to lock and release the position of the radial slider relative to the radial sliding groove.

4. A wheel bolt pre-tightening and measuring tool for wheel bolt tightening test according to claim 3, characterized in that: It also includes a linkage ring, which is rotatably connected to the annular frame; the linkage ring and the radial slider are respectively provided with matching threads, and when the linkage ring rotates, the threads drive the radial sliders to synchronously slide radially along their corresponding radial grooves.

5. A wheel bolt pre-tightening and measuring tool for wheel bolt tightening test according to claim 4, characterized in that: The linkage ring is located below the annular frame, the upper end surface of the linkage ring is provided with an annular plane thread, and the lower end surface of the radial sliding block is provided with a corresponding thread groove.

6. A wheel bolt pre-tightening and measuring tool for wheel bolt tightening test according to claim 5, characterized in that: The radial slider and the annular frame are provided with corresponding scale lines for indicating the diameter of the circle where the rotation center of the bolt sleeve is located corresponding to the position of the radial slider.

7. A wheel bolt pre-tightening and measuring tool for wheel bolt tightening test according to any one of claims 1 to 6, characterized in that: It also includes a controller, which is electrically connected to the driving device and the sensor respectively.

8. A wheel bolt pre-tightening and measuring tool for wheel bolt tightening test according to claim 7, characterized in that: The controller controls the driving device based on working parameters and / or relevant curves of these working parameters; the working parameters include real-time torque, rotation angle, rotation speed, working time, and target torque.

9. A wheel bolt pre-tightening and measuring tool for wheel bolt tightening test according to claim 7, characterized in that: The driving device is a pneumatic rotary cylinder.

10. A wheel bolt pre-tightening and measuring tool for wheel bolt tightening test according to claim 7, characterized in that: The driving device is a motor.

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