Gear shifting hub positioning tool

Abstract

The utility model relates to the technical field of automobile parts, and discloses a gear shifting hub positioning tool which comprises a base plate, a base plate, a positioning seat arranged on the base plate, a positioning pin vertically arranged in the middle of the positioning seat, and a pressing device arranged on the base plate and pressing a gear shifting hub on the positioning seat. A sinking groove allowing the bottom of the gear shifting hub to be embedded is formed in the positioning seat, a check block is arranged on the bottom face of the sinking groove, a vertical opening is formed in the position, beside the check block, of the positioning seat, a limiting block used for limiting rotation of the gear shifting hub is arranged in the vertical opening, and an overhead cavity is formed below the positioning seat. And a driving structure for driving the limiting block to move is arranged in the overhead cavity. The center hole of the gear shifting hub is aligned with the positioning pin to be inserted, it is ensured that the hub inner protruding block is located between the check block and the limiting block, then the driving structure drives the limiting block, the limiting block and the check block jointly limit rotation of the hub inner protruding block, circumferential positioning of the gear shifting hub can be achieved, and the operation process is simplified.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile parts, in particular to a shift hub positioning tool. Background Art

[0002] In the automatic shift mechanism of automobiles, the shift hub is a key component, which is used to control and realize the switching between different gears. The shift hub is usually composed of a set of gears or racks, which are connected by moving or rotating to change the transmission ratio and realize the shifting operation of the vehicle under different speed and load conditions.

[0003] See Figure 2 As shown, in order to detect the real-time position of the shift hub 1, the shift hub 1 needs to be press-fitted onto the rotating shaft, and the sensor is connected to the rotating shaft through transmission, thereby detecting the real-time position signal in real time and feeding it back to the control system.

[0004] In fact, the end of the rotating shaft 2 connected to the sensor will form a mounting cut surface 21. The circumferential mounting position of the mounting cut surface 21 relative to the shift hub directly affects the position accuracy of the shift hub detected by the sensor. In other words, before the rotating shaft is pressed, the shift hub and the rotating shaft need to be circumferentially positioned at the same time, and then the shift hub and the rotating shaft are coaxially pressed. Therefore, it is urgent to develop a positioning tool that can circumferentially position the shift hub and then clamp it.

[0005] It can be seen that the existing technology still needs to be improved and enhanced. Utility Model Content

[0006] In view of the above-mentioned deficiencies in the prior art, an object of the present invention is to provide a positioning tool that can both position the circumference of a shift hub and clamp the shift hub.

[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0008] A shift hub positioning tool comprises a base plate, a pad arranged on the base plate, a positioning seat arranged on the pad plate, a positioning pin vertically arranged in the middle of the positioning seat, and a clamp arranged on the pad plate and pressing the shift hub against the positioning seat, wherein the positioning seat is provided with a sinking groove for the bottom of the shift hub to be embedded in, a block is provided on the bottom surface of the sinking groove, the positioning seat is provided with a vertical opening beside the block, a limit block for limiting the rotation of the shift hub is provided in the vertical opening, an overhead cavity is provided below the positioning seat, and a driving structure for driving the limit block to move is provided in the overhead cavity.

[0009] As a further improvement of the above technical solution, a latch which is rotatably connected to the limit block is installed on the positioning seat.

[0010] As a further improvement of the above technical solution, the limit block includes a push head, a limit block body, and a lower fork which are integrally formed from top to bottom, the latch penetrates the limit block body transversely, and the driving structure drives the limit block to rotate by pulling the lower fork.

[0011] As a further improvement of the above technical solution, the driving structure includes a linear drive and a bidirectional push rod arranged on the output end of the linear drive, the bidirectional push rod includes a first column head, a connecting shaft, and a second column head which are coaxially connected in sequence, and the lower fork is clamped on the connecting shaft.

[0012] As a further improvement of the above technical solution, the positioning pin vertically penetrates the positioning seat and can move vertically, and the positioning pin is supported by a floating limiting mechanism.

[0013] As a further improvement of the above technical solution, the floating limit mechanism includes a cylinder bracket fixed to the bottom of the base plate, a cylinder arranged upward on the cylinder bracket, and a support rod coaxially arranged on the end of the piston rod of the cylinder. The base plate is provided with an overhead plate for raising the pad, and the overhead plate is provided with a guide seat fixed to the base plate. A guide hole cooperating with the positioning pin and an avoidance hole connected to the guide hole are opened at the center of the guide seat, and the avoidance hole is used for the support rod to pass through.

[0014] As a further improvement of the above technical solution, the locating pin includes a pin body and a pin tail round head arranged at the bottom of the pin body, the diameter of the pin tail round head is larger than the pin body, and a spring is sleeved on the pin body, the top end of the spring presses against the bottom surface of the locating seat, and the bottom end of the spring presses against the upper surface of the pin tail round head.

[0015] As a further improvement of the above technical solution, a positioning structure is provided on the left and right sides of the overhead plate respectively, and the positioning structure includes a longitudinal block fixed on the base plate, and an adjusting screw threadedly connected to the longitudinal block and facing the overhead plate.

[0016] As a further improvement of the above technical solution, the clamp includes a lever cylinder and a lower pressure head arranged on the output end of the lever cylinder.

[0017] As a further improvement of the above technical solution, an infrared detection mechanism for detecting whether a shift hub is placed on the positioning seat is provided on the base plate.

[0018] The beneficial effects of the utility model: the shift hub positioning tool provided by the utility model is easy to operate. The operator only needs to align the center hole of the shift hub with the positioning pin and insert it and ensure that the protrusion in the hub is located between the stop block and the limit block. Then, the limit block is driven by the driving structure. The limit block and the stop block jointly limit the rotation of the protrusion in the hub, so that the circumferential positioning of the shift hub can be achieved, simplifying the operation process. The limit block in the tool can also push the protrusion in the hub when the shift hub is not fully pre-positioned, ensuring that the shift hub will not lose its position due to external factors during the press-fitting process, thereby improving the reliability of positioning. Finally, the shift hub is firmly pressed against the positioning seat by the clamp to prevent jumping during the press-fitting rotation process and ensure the stability of the shift hub. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A perspective view of the shift hub.

[0020] Figure 2 This is a three-dimensional view of the shift hub after the shaft is pressed into place.

[0021] Figure 3 This is the main view of the shift hub after it is clamped and positioned by the shift hub positioning tool.

[0022] Figure 4 A three-dimensional view of the shift hub positioning tooling.

[0023] Figure 5 A three-dimensional view of the shift hub locating tool behind the hidden locating seat.

[0024] Figure 6 It is a structural schematic diagram of the cooperation between the floating limit mechanism and the positioning pin.

[0025] Main component symbol description: 1-shift hub, 11-center hole, 12-hub inner convex block, 2-rotating shaft, 21-mounting section, 31-base plate, 32-pad, 33-positioning seat, 331-sinking groove, 332-block, 333-vertical opening, 34-overhead plate, 35-pressor, 36-adjustment structure, 361-vertical block, 362-adjustment screw, 41-limit block, 411-push head, 412-limit block body, 413- Lower fork, 42-latch pin, 43-linear drive, 44-bidirectional push rod, 441-first column head, 442-connecting shaft, 443-second column head, 51-locating pin, 511-pin body, 512-pin tail round head, 52-floating limit mechanism, 521-cylinder bracket, 522-cylinder, 523-support rod, 524-guide seat, 5241-guide hole, 5242-avoidance hole, 525-spring, 6-infrared detection mechanism. DETAILED DESCRIPTION

[0026] The utility model provides a shift hub positioning tool. In order to make the purpose, technical solution and effect of the utility model clearer and more specific, the utility model is further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the protection scope of the utility model.

[0027] See Figure 1 As shown, the shift hub 1 is cylindrical and has a center hole 11. The interior of the shift hub 1 is hollowed out, and an isosceles trapezoidal inner hub protrusion 12 is formed on the inner wall of the shift hub 1 near the bottom surface. By limiting the circumferential position of the inner hub protrusion 12, the shift hub 1 can be circumferentially positioned.

[0028] Therefore, please refer to Figure 2-Figure 6 The utility model provides a shift hub positioning tool, including a base plate 31, a pad 32 arranged on the base plate 31, a positioning seat 33 arranged on the pad 32, a positioning pin 51 vertically arranged in the middle of the positioning seat 33, and a presser 35 arranged on the pad 32 and pressing the shift hub 1 on the positioning seat 33. The positioning seat 33 is provided with a sinking groove 331 for the bottom of the shift hub 1 to be embedded. The sinking groove 331 is adapted to the structure of the shift hub 1, so the sinking groove 331 is a circular groove structure. A stopper 332 is provided on the bottom surface of the sinking groove 331. The positioning seat 33 is provided with a vertical opening 333 beside the stopper 332. A limit block 41 for limiting the rotation of the shift hub 1 is provided in the vertical opening 333. An overhead cavity is provided below the positioning seat 33, and a driving structure for driving the limit block 41 to move is provided in the overhead cavity.

[0029] In the actual initial state, the limit block 41 will be slightly away from the stop block 332, so that there is enough space for the hub inner protrusion 12 to be stuck between the limit block 41 and the stop block 332. Before pressing the rotating shaft 2, the staff first aligns the center hole 11 of the shift hub 1 with the positioning pin 51 and inserts it until the bottom of the shift hub 1 is embedded in the sinking groove 331, and ensures that the hub inner protrusion 12 is located between the stop block 332 and the limit block 41. The staff can slightly rotate the shift hub 1 to make the hub inner protrusion 12 abut against the side of the stop block 332 to achieve pre-positioning, and then the driving structure drives the limit block 41 to move toward the stop block 332 until the limit block 41 just touches the hub inner protrusion 12, so that the limit block 41 and the stop block 332 jointly limit the rotation of the hub inner protrusion 12, thereby positioning the shift hub 1 circumferentially, and finally the presser 35 firmly presses the shift hub 1 on the positioning seat 33 to prevent the shift hub 1 from jumping when it is pressed and rotated.

[0030] It is understandable that, even if the staff does not rotate the shift hub 1 to make the hub inner protrusion 12 abut against the side of the stopper 332, the limit block 41 will push the hub inner protrusion 12 to rotate in the direction of the stopper 332 until the limit block 41 and the stopper 332 completely limit the rotation of the hub inner protrusion 12, and the shift hub 1 achieves circumferential positioning. The limit block 41 compensates for the problem that the hub inner protrusion 12 does not abut against the side of the stopper 332 for pre-positioning, or the hub inner protrusion 12 is separated from the stopper 332 due to external factors such as vibration during the press-fitting process of the shift hub 1, resulting in the failure of the shift hub 1 to position.

[0031] The shift hub positioning tool provided by the utility model is easy to operate. The operator only needs to align the center hole of the shift hub 1 with the positioning pin and ensure that the hub inner protrusion 12 is located between the stopper 332 and the limit block 41, and then drive the limit block 41 through the driving structure. The limit block 41 and the stopper 332 jointly limit the rotation of the hub inner protrusion 12, so that the circumferential positioning of the shift hub 1 can be achieved, simplifying the operation process. The limit block 41 in the tool can also push the hub inner protrusion 12 when the shift hub 1 is not fully pre-positioned, ensuring that the shift hub 1 will not lose its position due to external factors during the press-fitting process, thereby improving the reliability of positioning. Finally, the shift hub 1 is firmly pressed on the positioning seat 33 by the press 35 to prevent jumping during the press-fitting rotation process and ensure the stability of the shift hub 1.

[0032] In this embodiment, a latch 42 is mounted on the positioning seat 33 and is rotatably connected to the stopper 41. The latch 42 not only facilitates the installation of the stopper 41, but also allows the stopper 41 to have the freedom of movement to swing close to or away from the stopper 332, making it easy to control and stable in movement; it also bears part of the load generated by the gravity and swing of the stopper 41, reduces the output kinetic energy required by the driving structure, and ensures that the stopper 41 has sufficient limiting force on the hub inner protrusion 12.

[0033] Specifically, the limit block 41 includes a push head 411, a limit block body 412, and a lower fork 413 which are integrally formed from top to bottom, the latch 42 passes through the limit block body 412 in a transverse direction, and the driving structure drives the limit block 41 to rotate by pulling the lower fork 413. The design of driving the limit block 41 to rotate by pulling the lower fork 413 is simple and effective. The design of the driving structure makes the operation more convenient, and can realize fast and accurate rotation of the limit block 41, thereby improving production efficiency.

[0034] Specifically, the driving structure includes a linear drive 43 and a bidirectional push rod 44 disposed on the output end of the linear drive 43. The linear drive 43 is preferably a single-acting cylinder 522, which has a compact structure, does not have a reverse force, and is more reliable and stable to use. In order to reliably drive the limit block 41, the bidirectional push rod 44 includes a first column head 441, a connecting shaft 442, and a second column head 443 that are coaxially connected in sequence. The first column head 441 is connected to the output end of the linear drive 43, and the lower fork 413 is stuck on the connecting shaft 442 to ensure that the limit block 41 cannot move axially along the pin 42 and disengage from the bidirectional push rod 44. The lower fork 413 is driven by the first column head 441 or the second column head 443, which cleverly solves the interference of the movement of the bidirectional push rod 44 caused by the flipping of the lower fork 413. When the push head 411 on the limit block 41 is about to approach the stop block 332, the piston rod of the single-acting cylinder 522 extends, and the first column head 441 pushes the lower fork 413 of the limit block 41 to flip; when the push head 411 on the limit block 41 is about to move away from the stop block 332, the piston rod of the single-acting cylinder 522 retracts, and the second column head 443 pushes the lower fork 413 of the limit block 41 to flip. The linear drive 43 can provide stable linear motion, and the design of the bidirectional push rod 44 can ensure that the driving force is transmitted to the limit block 41. This structure can achieve precise driving and ensure the accurate position and stable motion of the limit block 41.

[0035] In fact, after the rotating shaft 2 is pressed into the center hole 11, the rotating shaft 2 will continue to move downward and collide with the positioning pin 51, pushing the positioning pin 51 away from the center hole 11, while also ensuring that the rotating shaft 2 is pressed down to the set depth of the center hole 11 according to the processing requirements. Therefore, the positioning pin 51 vertically penetrates the positioning seat 33 and can move vertically. The positioning pin 51 is supported by the floating limit mechanism 52. The positioning pin 51 can move dynamically under the action of the downward pressure, and after the bottom end of the rotating shaft 2 reaches the set position, the positioning pin 51 is restricted by the floating limit mechanism 52 to reversely resist the trend of the rotating shaft 2 to continue to move downward.

[0036] Specifically, the floating limit mechanism 52 includes a cylinder bracket 521 fixed to the bottom of the base plate 31, a cylinder 522 arranged upward on the cylinder bracket 521, and a support rod 523 coaxially arranged on the end of the piston rod of the cylinder 522. The base plate 31 is provided with an overhead plate 34 for raising the pad 32, and the overhead plate 34 is provided with a guide seat 524 fixed to the base plate 31. The center of the guide seat 524 is provided with a guide hole 5241 matched with the positioning pin 51 and an avoidance hole 5242 connected to the guide hole 5241, and the avoidance hole 5242 is used for the support rod 523 to pass through. The guiding effect of the guide seat 524 on the positioning pin 51 can not only ensure the correct movement direction of the positioning pin 51, but also ensure that the top end of the support rod 523 and the bottom end of the positioning pin 51 always maintain stable docking without deviation. Through the design of the dynamic limiting mechanism, it can be ensured that the shaft 2 is provided with appropriate limiting and support by the air pressure of the cylinder 522 during the downward pressing process, avoiding equipment damage or processing quality problems caused by excessive downward pressing or inaccurate positioning of the shaft 2, thereby improving the safety of operation.

[0037] It is understandable that, in the initial state, the piston rod of the cylinder 522 extends, driving the support rod 523 to lift the positioning pin 51 upward and extend out of the positioning seat 33, so as to ensure that the positioning pin 51 can cooperate with the center hole 11 of the shift hub 1. When the rotating shaft 2 presses down on the positioning pin 51, the positioning pin 51 overcomes the air pressure of the cylinder 522 and gradually moves downward until the air pressure of the cylinder 522 is equal to the press-fitting force of the rotating shaft 2, and the rotating shaft 2 is pressed into place.

[0038] In fact, although the positioning pin 51 is supported by the support rod 523, the positioning pin 51 has the instability of jumping upward, and it is impossible to ensure that the positioning pin 51 is always tightly connected with the support rod 523. Therefore, the positioning pin 51 includes a pin body 511 and a pin tail round head 512 arranged at the bottom of the pin body 511. The diameter of the pin tail round head 512 is larger than the pin body 511. The pin body 511 is sleeved with a spring 525, and the top end of the spring 525 presses against the bottom surface of the positioning seat 33, and the bottom end of the spring 525 presses against the upper surface of the pin tail round head 512. The pin tail round head 512 of the positioning pin 51 forms a linkage with the spring 525, and the spring 525 provides an appropriate amount of downward pressure on the positioning pin 51, which can effectively slow down or suppress the instability of the positioning pin 51 jumping upward. The existence of the spring 525 can provide appropriate support and damping, so that the positioning pin 51 can maintain a stable position when subjected to external force or vibration, ensuring the accuracy and reliability of positioning.

[0039] In this embodiment, the left and right sides of the overhead plate 34 are respectively provided with adjustment structures 36, and the adjustment structures 36 include a longitudinal block 361 fixed on the base plate 31, and an adjustment screw 362 threadedly connected to the longitudinal block 361 and facing the overhead plate 34. Correspondingly, waist-shaped holes are opened on the overhead plate 34. When installing the overhead plate 34, the adjustment screws 362 on the left and right sides are rotated to push the overhead plate 34 to move horizontally, thereby accurately adjusting the position of the overhead plate 34.

[0040] In order to prevent the device from triggering the press-fitting action when the shift hub 1 is not placed, the base plate 31 is provided with an infrared detection mechanism 6 for detecting whether the shift hub 1 is placed on the positioning seat 33. The infrared detection mechanism 6 includes a stand and a diffuse reflection photoelectric switch or infrared sensor arranged on the stand.

[0041] In this embodiment, the clamp 35 includes a lever cylinder 522 and a lower pressure head arranged on the output end of the lever cylinder 522, which can provide sufficient clamping force to the shift hub 1 to ensure the stability of the position of the shift hub 1 during the press-fitting process.

[0042] In the description of the present invention, it should 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" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, 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 a limitation on the present invention.

[0043] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; 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. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0044] It is understandable that those skilled in the art can make equivalent substitutions or changes based on the technical solution and the utility model concept of the utility model, and all these changes or substitutions should fall within the protection scope of the utility model.

Claims

1. A shift hub positioning tool, characterized in that: The invention comprises a base plate, a pad arranged on the base plate, a positioning seat arranged on the pad plate, a positioning pin arranged vertically in the middle of the positioning seat, and a clamp arranged on the pad plate and pressing the shift hub onto the positioning seat, wherein the positioning seat is provided with a sinking groove for the bottom of the shift hub to be embedded, a stopper is provided on the bottom surface of the sinking groove, the positioning seat is provided with a vertical opening beside the stopper, a limit block is provided in the vertical opening for limiting the rotation of the shift hub, an overhead cavity is provided below the positioning seat, and a driving structure for driving the limit block to move is provided in the overhead cavity.

2. The shift hub positioning tool according to claim 1, characterized in that: The positioning seat is provided with a latch which is rotatably connected with the limiting block.

3. The shift hub positioning tool according to claim 2, characterized in that: The limit block comprises a push head, a limit block body, and a lower fork which are integrally formed from top to bottom in sequence, the latch pin penetrates the limit block body transversely, and the driving structure drives the limit block to rotate by pulling the lower fork.

4. The shift hub positioning tool according to claim 3, characterized in that: The driving structure includes a linear drive and a bidirectional push rod arranged on the output end of the linear drive. The bidirectional push rod includes a first column head, a connecting shaft, and a second column head which are coaxially connected in sequence. The lower fork is clamped on the connecting shaft.

5. The shift hub positioning tool according to claim 1, characterized in that: The positioning pin vertically penetrates the positioning seat and can move vertically, and the positioning pin is supported by a floating limiting mechanism.

6. The shift hub positioning tool according to claim 5, characterized in that: The floating limit mechanism includes a cylinder bracket fixed to the bottom of the base plate, a cylinder arranged upward on the cylinder bracket, and a support rod coaxially arranged on the end of the piston rod of the cylinder. The base plate is provided with an overhead plate for raising the pad, and the overhead plate is provided with a guide seat fixed to the base plate. A guide hole cooperating with a positioning pin and an avoidance hole connected to the guide hole are opened at the center of the guide seat, and the avoidance hole is used for the support rod to pass through.

7. The shift hub positioning tool according to claim 6, characterized in that: The locating pin includes a pin body and a pin tail round head arranged at the bottom of the pin body, the diameter of the pin tail round head is larger than the pin body, and a spring is sleeved on the pin body, the top end of the spring presses against the bottom surface of the locating seat, and the bottom end of the spring presses against the upper surface of the pin tail round head.

8. The shift hub positioning tool according to claim 6, characterized in that: The left and right sides of the overhead plate are respectively provided with adjustment structures, and the adjustment structures include a longitudinal block fixed on the base plate, and an adjustment screw threadedly connected to the longitudinal block and facing the overhead plate.

9. The shift hub positioning tool according to claim 1, characterized in that: The clamp comprises a lever cylinder and a lower pressing head arranged on the output end of the lever cylinder.

10. The shift hub positioning tool according to claim 1, characterized in that: The base plate is provided with an infrared detection mechanism for detecting whether a shift hub is placed on the positioning seat.

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