A position measurement tool for shift shaft assemblies in new energy vehicles

Abstract

This invention discloses a position measurement tool for a shift shaft assembly in a new energy vehicle, comprising: a base plate; a first positioning seat fixedly mounted on the base plate; a groove extending axially through the top of the first positioning seat, the groove having an arc-shaped cross-section; two first positioning pin holes symmetrically arranged on both sides of the groove; two first positioning pins corresponding to the two first positioning pin holes; a second positioning seat fixedly mounted on the base plate, with one end near the first positioning seat spaced apart from the end of the first positioning seat; the distance between the first positioning pin holes and the second positioning seat matches the distance between the shift arm and the shift shaft limiting pin groove to be tested; and a shift lever contouring seat near the other end of the first positioning seat; the top of the shift lever contouring seat has an axially through shift lever contouring groove, the cross-sectional shape of which matches the cross-sectional shape of the shift lever to be tested.

Description

Technical Field

[0001] This invention belongs to the field of testing technology for shift shaft assemblies in new energy vehicles, and specifically relates to a position measurement tool for shift shaft assemblies in new energy vehicles. Background Technology

[0002] As a key component of the gear shifting actuator assembly, the shift shaft assembly is mainly used to enable the gear shifting function of the actuator assembly. The shift shaft assembly can ensure that the driver can accurately and reliably engage any gear required by the transmission and automatically shift back to neutral after shifting.

[0003] The positioning hole distance of the shift shaft limit pin, the positional accuracy of the shift shaft gear center reference A, the shift arm U-shaped center line, and the shift lever gear center are all important inspection parameters for this type of component. If these parameters are not up to standard, installation may be impossible, the shift motor may jam during operation, stress concentration may occur in the component, and product performance may be affected. Measuring the distance from the limit pin to the reference and related positional accuracy on the shift shaft assembly is very difficult, as there are no dedicated measuring tools. Current measuring tools include coordinate measuring machines and 2D measuring instruments.

[0004] While coordinate measuring machines (CMMs) and two-dimensional measuring instruments can be used for testing during the sample stage, this testing method is time-consuming. In the mass production stage, it will greatly increase the workload of the quality department and cannot meet the needs of on-site inspection and employee self-inspection.

[0005] To address the current difficulties in detecting the position accuracy of shift shaft assemblies, it is necessary to design and develop a qualitative position accuracy gauge that is highly accurate, low-cost, easy to operate, and space-saving. Summary of the Invention

[0006] The purpose of this invention is to provide a position gauge for the shift shaft assembly of new energy vehicles. It is simple to operate, occupies little space, and can realize rapid detection of the position of the shift shaft assembly of new energy vehicles.

[0007] The technical solution provided by this invention is as follows:

[0008] A position measurement tool for a gear shift shaft assembly in a new energy vehicle includes:

[0009] Base plate;

[0010] The first positioning seat is fixedly mounted on the base plate; the top of the first positioning seat is provided with an axially penetrating groove, the cross-section of which is arc-shaped.

[0011] Two first positioning pin holes are formed on the first positioning seat, and the two first positioning pin holes are symmetrically arranged on both sides of the groove;

[0012] Two first positioning pins are provided, each corresponding to one of the two first positioning pin holes, and the first positioning pins can be selectively inserted into or pulled out of the first positioning pin holes.

[0013] The second positioning seat is fixedly mounted on the base plate, and its end near the first positioning seat is spaced apart from the end of the first positioning seat;

[0014] The shape of the second positioning seat matches the size of the reference groove of the shift arm to be tested; the distance between the first positioning pin hole and the second positioning seat matches the distance between the shift arm to be tested and the limit pin groove of the shift shaft.

[0015] A shift lever guide seat is provided at the other end near the first positioning seat; the top of the shift lever guide seat is provided with an axially penetrating shift lever guide groove, the cross-sectional shape of the guide groove matches the cross-sectional shape of the shift lever to be tested; and the height difference between the guide groove and the groove matches the height difference between the axis of the shift shaft and the shift lever.

[0016] Preferably, the position measurement fixture for the shift shaft assembly of new energy vehicles is characterized by further comprising:

[0017] Second positioning pin;

[0018] The second positioning seat has a second positioning pin hole; the size of the second positioning pin hole matches the size of the U-shaped groove of the shift arm, and the height difference between the second positioning pin hole and the groove matches the height difference between the U-shaped groove of the shift arm and the shift shaft.

[0019] The second locating pin can be selectively inserted into or removed from the second locating pin hole.

[0020] Preferably, the diameter of the first positioning pin hole is equal to the diameter of the cross-sectional arc of the shift shaft limiting pin groove.

[0021] Preferably, the position measurement tool for the shift shaft assembly of new energy vehicles further includes:

[0022] Two handles are symmetrically arranged on the base plate and are respectively located near both ends of the base plate.

[0023] Preferably, the distance between the outer end face of the shift lever contour seat and the center of the second positioning seat is less than the length of the shift shaft.

[0024] Preferably, the second positioning seat is a cuboid block structure, and the length of the second positioning seat along the axial direction of the first positioning seat is equal to the width of the shift arm reference groove.

[0025] Preferably, the height difference between the second positioning seat and the groove is greater than or equal to the height difference between the top of the shift shaft and the top of the shift arm reference groove.

[0026] The beneficial effects of this invention are:

[0027] The position gauge for the shift shaft assembly of new energy vehicles provided by this invention has high detection accuracy, low cost, simple operation and small space occupation, and can realize rapid detection of the position of the shift shaft assembly of new energy vehicles.

[0028] The position measurement fixture for the shift shaft assembly of new energy vehicles provided by this invention uses qualitative testing to measure the distance from reference A to the limit pin; the position of the shift shaft tooth center, the shift arm U-shaped center line, and the shift lever tooth center can be qualitatively measured on the same fixture. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of the position measurement tool for the gear shift shaft assembly of new energy vehicles according to the present invention.

[0030] Figure 2 This is the main idea behind the new energy vehicle shift shaft assembly described in this invention.

[0031] Figure 3 This is a right view of the new energy vehicle shift shaft assembly described in this invention.

[0032] Figure 4 This is a schematic diagram of the first positioning pin hole and the second positioning pin hole according to the present invention.

[0033] Figure 5 This is a schematic diagram showing the usage state of the position measurement tool for the shift shaft assembly of new energy vehicles as described in this invention.

[0034] Figure 6-7 This is a schematic diagram of the dimensions of the shift shaft assembly to be tested in an embodiment of the present invention.

[0035] Figure 8-10 This is a schematic diagram of the dimensions of the position gauge used in an embodiment of the present invention. Detailed Implementation

[0036] The present invention will now be described in further detail with reference to the accompanying drawings, so that those skilled in the art can implement it based on the description.

[0037] like Figure 1-5 As shown, the present invention provides a position measurement tool for a shift shaft assembly in a new energy vehicle, comprising: a base plate 110, a first positioning seat 120, a second positioning seat 130, a shift lever profiling seat 140, a first positioning pin 150, a second positioning pin 160, and a handle 170.

[0038] Figure 2-3 This is a schematic diagram of the structure of a shift shaft assembly for a new energy vehicle to be tested. The shift shaft assembly includes a shift shaft 210, a shift arm 220, and a shift paddle 230. The shift paddle 230 is located at one end of the shift shaft 210; the other end of the shift shaft 210 has an external spline. The shift paddle 230 is sleeved on the shift shaft 210 via an annular connecting body. The annular connecting body has an internal spline that matches the external spline, allowing the shift paddle 230 to move along the external spline of the shift shaft (the axial direction of the shift shaft 210). An annular limiting pin groove 211 is located at the middle position of the shift shaft 210. The shift arm 220 includes two support arms, forming a shift arm reference groove 221 between the two support arms. The lower ends of the two support arms are respectively provided with shift arm U-shaped grooves 222, which are symmetrically arranged on the two shift arms.

[0039] The base plate 110 is a horizontally positioned rectangular flat plate; the first positioning seat 120 is fixedly mounted on the base plate 110. The top of the first positioning seat 120 has an axially penetrating groove 121, the cross-section of which is arc-shaped. The groove 121 of the first positioning seat 120 is used to place the shift shaft 210; therefore, the diameter of the groove 121 is not less than the diameter of the shift shaft 210 to be tested, ensuring that the shift shaft 210 can be smoothly placed into the groove 121.

[0040] Two first positioning pin holes 122 are formed on the first positioning seat 120, and the two first positioning pin holes 122 are symmetrically arranged on both sides of the groove 120 (in the axial direction). Two first positioning pins 150 are provided in a one-to-one correspondence with the two first positioning pin holes 122, and the diameter of the first positioning pin 150 matches the diameter of the first positioning pin hole 122, so that the first positioning pin 150 can be selectively inserted into or pulled out of the first positioning pin hole 122, but the first positioning pin 150 cannot wobble within the first positioning pin hole 122.

[0041] As a preferred embodiment, the diameter of the first locating pin 150 and the diameter of the first locating pin hole 122 are approximately equal to the diameter of the arc of the cross-section of the shift shaft limiting pin groove 211. This arrangement ensures that the position of the first locating pin 150 when inserted accurately corresponds to the center position of the shift shaft limiting pin groove 211, resulting in more accurate test results.

[0042] The second positioning seat 130 is fixedly mounted on the base plate 110. The second positioning seat 130 is located near one end of the first positioning seat 120 and is spaced apart from the end of the first positioning seat 120. The size of the second positioning seat 130 matches the size of the shift arm reference groove 221 to be tested. The distance between the first positioning pin hole 150 and the second positioning seat 130 (in the horizontal direction) matches the distance between the shift arm 220 to be tested and the shift shaft limiting pin groove 221.

[0043] The shift paddle contouring seat 140 is located at the other end near the first positioning seat 110; the top of the shift paddle contouring seat 140 is provided with an axially penetrating shift paddle contouring groove 141, the cross-sectional shape of the contouring groove 141 matches the cross-sectional shape of the lower end of the shift paddle 140 to be tested; and the height difference between the contouring groove 141 and the groove 121 matches the distance between the axis of the shift shaft 210 and the shift paddle 230.

[0044] As a preferred embodiment, the second positioning seat 130 has a second positioning pin hole 131; the size of the second positioning pin hole 131 matches the size of the shift arm U-shaped groove 222; and the height difference between the second positioning pin hole 131 and the groove 121 matches the height difference between the shift arm U-shaped groove 222 and the shift shaft 210. The axis of the second positioning pin hole 131 is parallel to the axis of the groove 121, and the second positioning pin hole 131 axially penetrates the second positioning seat 130. The second positioning pin 160 can be selectively inserted into or removed from the second positioning pin hole 131. The length of the second positioning pin 160 is greater than the length of the second positioning pin hole 131. After the second positioning pin 160 is inserted into the second positioning pin hole 131, both ends of the second positioning pin 160 are respectively engaged in the two shift arm U-shaped grooves 222. The second positioning pin 160 can limit the position of the shift arm 220, realize the positioning of the shift arm 220, and improve the accuracy of the detection results.

[0045] The horizontal distance between the outer end face of the shift lever guide seat 140 (the end face away from the first positioning seat 120) and the center of the second positioning seat 130 is less than the length of the shift shaft 210. This arrangement allows the shift lever 230 to move away from the position of the shift lever guide seat 140 (so that the shift lever 230 is located outside the shift lever guide seat 140) after the shift arm reference groove 221 is positioned. This facilitates the further position detection of the shift lever 230 through the shift lever guide seat 140 after the shift arm reference groove 221 is positioned.

[0046] In one embodiment, the second positioning seat 130 is a cuboid block structure, and the length of the second positioning seat 130 along the axial direction of the first positioning seat is approximately equal to the slot pitch of the shift arm reference slot 221 (the distance between the two arms of the shift arm). Wherein, the (horizontal) distance between the end face of the second positioning seat 130 and the end face of the first positioning seat 120 is greater than the thickness of the arm of the shift arm 220. This enables the arm of the shift arm 220 to be smoothly inserted between the end face of the second positioning seat 130 and the end face of the first positioning seat 120. The height difference between the top of the second positioning seat 130 and the central axis of the groove 121 is greater than or equal to the height difference between the central axis of the shift shaft 210 and the shift arm reference slot 221. This can ensure that when the shift shaft 210 is horizontally placed in the groove 121, the top of the second positioning seat 130 just abuts against the top of the shift arm reference slot 221 or is lower than the top of the shift arm reference slot 221, so that the height of the second positioning seat 130 is not too high, and the second positioning seat 130 does not lift the shift arm 220, causing the shift shaft 210 to be suspended or tilted.

[0047] Two handles 170 are symmetrically and fixedly arranged on the bottom plate 110, and are respectively arranged near both ends of the bottom plate 110. The arrangement of the handles 170 facilitates the movement of the inspection tool.

[0048] The usage method of the position degree inspection tool for the shift shaft assembly of new energy vehicles provided by the present invention is as follows:

[0049] Taking the second positioning seat as a reference, shift the shift lever to the outermost end of the shift shaft, and manually place the shift shaft assembly on the first positioning seat. At this time, the shift arm is correspondingly arranged on the second positioning seat, and insert the second positioning pin into the second positioning pin hole to complete the detection and positioning; try to insert the first positioning pin into the first positioning pin hole. If it can be smoothly inserted, it means that the distance from the shift arm reference to the limit pin slot is qualified. If it cannot be inserted or there is interference, it means it is unqualified.

[0050] Move the shift lever horizontally inward into the profiling groove. If it can smoothly slide in, it means it is qualified, otherwise it is unqualified. Thus, the position degrees of multiple spaces can be detected by one positioning, greatly improving the detection efficiency, and it can be used for batch detection.

[0051] Embodiment

[0052] Such as Figure 6-10As shown, in this embodiment, the dimensions and positional relationships of each component in the shift shaft assembly to be tested are as follows: the reference groove distance of the shift arm is 27±0.1, the horizontal distance between the center of the shift arm reference groove and the center of the shift shaft limiting pin groove is 93.7±0.1, the outer diameter of the shift shaft is 25±0.1, the cross-sectional arc diameter of the shift shaft limiting pin groove 211 is 6±0.1, the distance (height difference) between the shift shaft axis and the center of the shift lever is 50±0.1, the distance (height difference) between the shift shaft axis and the center of the shift arm U-shaped groove is 71±0.1, the diameter of the shift lever is 18.7±0.2, and the groove distance of the shift arm U-shaped groove is 12±0.1. The dimensions of each component of the position gauge applicable to the above-mentioned shift shaft assembly to be tested are as follows: The second positioning seat is a cuboid block structure with a length of 26.9 mm along the axial direction of the first positioning seat, with an upper tolerance of +0.03 mm and a lower tolerance of +0.01 mm; the horizontal distance between the center of the second positioning block and the center of the first positioning pin hole is 93.7 ± 0.05 mm; the diameter of the second positioning pin is 12 mm, with an upper tolerance of +0.03 mm and a lower tolerance of +0.01 mm; the second positioning pin hole and the second positioning pin are clearance fit; the radius of the arc of the cross-section of the groove at the top of the first positioning seat is 12.5 ± 0.05 mm; the distance (height difference) between the center of the arc of the cross-section of the groove at the top of the first positioning seat and the second positioning pin hole is 71 ± 0.05 mm; the distance between the center of the arc of the cross-section of the groove at the top of the first positioning seat and the center of the shift head contour groove is 50 ± 0.05 mm; the diameter of the arc corresponding to the cross-section of the shift head contour groove is 18.7 mm, with an upper tolerance of +0.05 mm and a lower tolerance of 0 mm. All the above values ​​are in mm.

[0053] Verification has shown that the position gauge in this embodiment has a stable testing process, can meet product testing requirements, and achieves the expected goals.

[0054] Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for the present invention. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. A position measurement tool for a gear shift shaft assembly in a new energy vehicle, characterized in that, include: Base plate; The first positioning seat is fixedly mounted on the base plate; the top of the first positioning seat is provided with an axially penetrating groove, the cross-section of which is arc-shaped. Two first positioning pin holes are formed on the first positioning seat, and the two first positioning pin holes are symmetrically arranged on both sides of the groove; Two first positioning pins are provided, each corresponding to one of the two first positioning pin holes, and the first positioning pins can be selectively inserted into or pulled out of the first positioning pin holes. The second positioning seat is fixedly mounted on the base plate, and its end near the first positioning seat is spaced apart from the end of the first positioning seat; The shape of the second positioning seat matches the size of the reference groove of the shift arm to be tested; the distance between the first positioning pin hole and the second positioning seat matches the distance between the shift arm to be tested and the limit pin groove of the shift shaft; the second positioning seat is provided with a second positioning pin hole; The second positioning pin is selectively inserted into or removed from the second positioning pin hole; Wherein, the second positioning pin hole matches the size of the shift arm U-shaped groove, and the height difference between the second positioning pin hole and the groove matches the height difference between the shift arm U-shaped groove and the shift shaft; A shift lever contouring seat is provided at the other end near the first positioning seat; the top of the shift lever contouring seat is provided with an axially penetrating shift lever contouring groove, the cross-sectional shape of the shift lever contouring groove matches the cross-sectional shape of the shift lever to be tested; and the height difference between the shift lever contouring groove and the groove matches the height difference between the axis of the shift shaft and the shift lever. The distance between the outer end face of the shift lever contour seat and the center of the second positioning seat is less than the length of the shift shaft.

2. The position measurement fixture for the gear shift shaft assembly of a new energy vehicle according to claim 1, characterized in that, The diameter of the first positioning pin hole is equal to the diameter of the cross-sectional arc of the shift shaft limiting pin groove.

3. The position measurement fixture for the shift shaft assembly of new energy vehicles according to claim 1, characterized in that, Also includes: Two handles are symmetrically arranged on the base plate and are respectively located near both ends of the base plate.

4. The position measurement fixture for the gear shift shaft assembly of a new energy vehicle according to claim 2 or 3, characterized in that, The second positioning seat is a cuboid block structure, and the length of the second positioning seat along the axial direction of the first positioning seat is equal to the width of the shift arm reference groove.

5. The position measurement fixture for the shift shaft assembly of a new energy vehicle according to claim 4, characterized in that, The height difference between the second positioning seat and the groove is greater than or equal to the height difference between the top of the shift shaft and the reference groove of the shift arm.

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