A device for bending grommet clamping jaws in an automatic gearbox
Patent Information
- Application Number
- CN202522196311.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-17
- Publication Date
- 2026-09-18
- Estimated Expiration
- 2035-10-17
AI Technical Summary
[0003]现有技术中，装配时，平放反驱动齿轮总成（轴承、垫圈、螺母齿轮由下至上依次布置，卡爪根部（卡爪与垫圈的连接处）接触轴承，卡爪外端翘起，卡爪与轴承之间会有一点小间隙），工人利用一字螺丝刀将卡爪一个一个推入螺母齿轮的相邻齿间，推入过程中，卡爪从卡爪根部开始折弯，直至整个卡爪由下至上逐渐贴到螺母齿轮的齿根面上为止，操作过程中，对于一个卡爪而言，需要进行两步推动，这是因为如前所言的原因“卡爪初始位于齿轮间间隙中，卡爪与轴承之间会有一点小间隙”，所以，一字螺丝刀是不能直接“伸到底”的，即一字螺丝刀一开始伸入卡爪与轴承之间时，一字螺丝刀的头部不能接触到卡爪根部，此时，若是工人直接将垫圈卡爪完全推入螺母齿轮的齿间并推到底，会导致“卡爪根部附近与螺母齿轮的齿根面之间间隙过大、但卡爪外端又接触螺母齿轮的齿根面”的情况，也即“卡爪整体与螺母齿轮的齿根面贴合不足”，不符合装配需求
[0011] The beneficial effects of this utility model are: it can assist workers in properly pre-pushing the jaws on the washer to prevent the pushing distance from being too small or too large, and it can also achieve the contact and prying of the jaws so that the jaws can smoothly contact the root surface of the nut gear. In addition, during the pre-pushing and contact and prying process, it can assist in limiting the movement and prevent the jaws from becoming unstable due to factors such as tool shaking or large swings, thus preventing abnormal deformation of the jaws.
Smart Images
Figure CN224763952U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of vehicle transmission structure assembly and gearbox installation tools, and particularly relates to an automatic gearbox inner washer claw bending device. Background Technology
[0002] In the reverse drive gear assembly of a vehicle's automatic transmission, such as Figure 4 , Figure 5 , Figure 6 As shown, the structure includes a nut gear 2, a washer 1, a reverse drive gear 7, a bearing 8, and a central support frame 9. The inner ring of the nut gear 2 is threadedly connected to the central support frame 9, and the nut gear 2 is located within the central hole of the reverse drive gear 7 (there is a gap between them, referred to as the gear gap). The washer 1 is placed between the nut gear 2 and the bearing 8. A bendable claw 101 is arranged around the outer edge of the washer 1 (the claw 101 is initially located within the gear gap; there is a small gap between the claw 101 and the bearing 8, and a gap between the claw 101 and the wall of the central hole of the reverse drive gear 7). After bending, the claw 101 can engage between adjacent teeth of the nut gear 2 (one claw 101 can engage between two adjacent teeth of the nut gear 2), thus preventing the nut gear 2 from loosening (the washer 1 and the inner ring of the bearing 8 are fixed to each other, so the washer 1 itself will not rotate).
[0003] In existing technology, during assembly, the reverse drive gear assembly (bearings, washers, and nut gears arranged sequentially from bottom to top, with the root of the chuck (the connection between the chuck and the washer) contacting the bearing, the outer end of the chuck raised, and a small gap between the chuck and the bearing) is laid flat. The worker uses a flathead screwdriver to push the chucks one by one into the adjacent teeth of the nut gear. During this pushing process, the chuck bends from its root until the entire chuck gradually adheres to the root surface of the nut gear teeth from bottom to top. In this operation, two pushing steps are required for each chuck, because, as mentioned earlier, "the chuck..." Initially positioned within the gear gap, there will be a small gap between the chuck and the bearing. Therefore, the flathead screwdriver cannot be inserted all the way in. That is, when the flathead screwdriver is initially inserted between the chuck and the bearing, the tip of the screwdriver cannot contact the root of the chuck. If the worker directly pushes the washer chuck completely into the gap between the nut and gear teeth and pushes it all the way in, it will result in a situation where "the gap between the chuck root and the root surface of the nut and gear teeth is too large, but the outer end of the chuck contacts the root surface of the nut and gear teeth," which means "the chuck as a whole does not fit sufficiently against the root surface of the nut and gear teeth," which does not meet the assembly requirements. Therefore, in practice, the first step is pre-pushing, where the chuck needs to partially enter the space between adjacent teeth of the nut gear. However, the pushing distance should not be too large to prevent the outer end of the chuck from prematurely contacting the root surface of the nut gear (if this happens, it means that the chuck itself will bend significantly, making it very difficult to push the chuck in the second step, and it will also make it difficult for the chuck to be pushed into place completely). The second step is to push and press against the chuck, that is, to push and press the chuck against the root surface of the nut gear from bottom to top. This requires the tool to start pushing and pressing from the root of the chuck until the tool sweeps and presses over the entire chuck from bottom to top, so that the chuck can be pressed against the root surface of the nut gear.
[0004] In reality, when pre-pushing the chuck in the first step, the force is not easy to control. Either the pushing distance is too small, and the chuck fails to partially enter the space between the adjacent teeth of the nut gear, or the pushing distance is too large, causing the outer end of the chuck to contact the root surface of the nut gear prematurely, affecting subsequent operations. Utility Model Content
[0005] This utility model provides a bending device for the claws of an automatic transmission inner washer. It can assist workers in pre-pushing the claws on the washer in a reasonable manner to prevent the pushing distance from being too small or too large. It can also realize the contact and prying of the claws so that the claws can smoothly contact the root surface of the nut gear. During the pre-pushing and contact and prying process, it can assist in limiting the movement and prevent the claw bending process from being unstable due to factors such as tool shaking or large swings, thus preventing abnormal deformation of the claws.
[0006] To achieve the above objectives, the present invention adopts the following technical solution: An automatic transmission inner washer claw bending device is used to push the claws on the washer into the adjacent teeth of the nut gear; It includes a main pry bar, a bending pry head located at one end of the main pry bar, and a pre-limiting structure located on the main pry bar; The other end of the main pry bar is the tail end of the main bar. The bending pry head includes a pry head seat and a pry head plate disposed on the pry head seat. The pry head plate, the pry head seat and the tail end of the main bar are arranged sequentially along the length direction of the main pry bar. The width direction of the pry head plate is perpendicular to the thickness direction of the pry head seat, the width direction of the pry head plate is perpendicular to the length direction of the main pry bar, and the thickness direction of the pry head plate is perpendicular to the length direction of the main pry bar. The width of the pry bar is consistent throughout, and the thickness of the pry bar gradually decreases from near the pry bar seat to far away from the pry bar seat. The pre-limiting structure includes two parallel limiting plates for contacting the top surface of the nut gear teeth. The space between the two limiting plates is the plate gap. A part of the pry bar is located in the plate gap, and a part of the main pry bar is located in the plate gap.
[0007] Preferably, it also includes a secondary pry bar, one end of which is fixed to the middle of the main pry bar, and the other end of which is the tail end of the secondary pry bar. The bending pry bar, the fixed end of the secondary pry bar, the tail end of the secondary pry bar and the tail end of the main pry bar are arranged sequentially along the length of the main pry bar, and the angle between the secondary pry bar and the main pry bar is 30 to 45 degrees.
[0008] Preferably, the end with the thinnest part of the pry bar is the entry end for inserting into the gap between the pawl and the reverse gear. The entry end, any limiting plate, and the tail end of the main rod are arranged sequentially along the length of the main pry bar. The surface of the pry bar that contacts the pawl, any limiting plate, and the auxiliary pry bar are arranged sequentially along the thickness direction of the pry bar.
[0009] Preferably, one end of the main pry bar is provided with a slot, and the pry head base is provided with a plate located in the slot. The plate is provided with a fixing screw that passes through the main pry bar and is used to press the main pry bar. The fixing screw is threadedly engaged with the plate. The fixing screw is provided with a fixing nut that is threadedly engaged with the fixing screw and is used to press the main pry bar. The axial direction of the fixing screw is parallel to the thickness direction of the pry head plate.
[0010] Preferably, the distance between the two limiting plates is the same as the width of the chuck, and the limiting plates are provided with limiting screws that pass through and press against the limiting plates. The limiting screws are threadedly fixed to the main pry bar.
[0011] The beneficial effects of this utility model are: it can assist workers in properly pre-pushing the jaws on the washer to prevent the pushing distance from being too small or too large, and it can also achieve the contact and prying of the jaws so that the jaws can smoothly contact the root surface of the nut gear. In addition, during the pre-pushing and contact and prying process, it can assist in limiting the movement and prevent the jaws from becoming unstable due to factors such as tool shaking or large swings, thus preventing abnormal deformation of the jaws. Attached Figure Description
[0012] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a partial structural schematic diagram of the present invention; Figure 3 This is a schematic diagram of the structure of the bending pry head of this utility model; Figure 4 This is a schematic diagram of the structure at the reverse drive gear; Figure 5 yes Figure 4 A schematic diagram of the local structure in the middle; Figure 6 yes Figure 4 Enlarged view of point A in the middle.
[0013] Reference numerals in the attached diagram: washer 1, pawl 101, nut gear 2, tooth top surface 2a, tooth root surface 2b, main pry bar 3, main rod tail end 3a, slot 3b, bending pry bar 4, pry bar seat 401, clamping plate 401.1, fixing screw 401.2, fixing nut 401.3, pry bar plate 402, entry end 402a, limiting plate 5, limiting screw 501, auxiliary pry bar 6, reverse drive gear 7, bearing 8, central support frame 9. Detailed Implementation
[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.
[0015] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 As shown, An automatic transmission inner washer claw bending device is used to push the claw 101 on the washer 1 into the adjacent teeth of the nut gear 2. It includes a main pry bar 3, a bending pry head 4 located at one end of the main pry bar 3, and a pre-limiting structure located on the main pry bar 3; The other end of the main pry bar 3 is the tail end 3a of the main bar. The bending pry head 4 includes a pry head seat 401 and a pry head plate 402 disposed on the pry head seat 401. The pry head plate 402, the pry head seat 401 and the tail end 3a of the main bar are arranged sequentially along the length direction of the main pry bar 3. The width direction of the pry head plate 402 is perpendicular to the thickness direction of the pry head seat 401. The width direction of the pry head plate 402 is perpendicular to the length direction of the main pry bar 3. The thickness direction of the pry head plate 402 is perpendicular to the length direction of the main pry bar 3. The width of the pry bar 402 is consistent throughout, and the thickness of the pry bar 402 gradually decreases from near the pry bar seat 401 to far away from the pry bar seat 401. The pre-limiting structure includes two parallel limiting plates 5 for contacting the tooth tips of the nut gear 2. The space between the two limiting plates 5 is the plate gap. A part of the pry bar 402 is located in the plate gap, and a part of the main pry bar 3 is located in the plate gap.
[0016] As mentioned in the background section, in the reverse drive gear assembly of a vehicle's automatic transmission, such as Figure 4 , Figure 5 , Figure 6 As shown, the structure includes a nut gear 2, a washer 1, a reverse drive gear 7, a bearing 8, and a central support frame 9. The inner ring of the nut gear 2 is threadedly connected to the central support frame 9, and the nut gear 2 is located within the central hole of the reverse drive gear 7 (there is a gap between them, referred to as the gear gap). The washer 1 is placed between the nut gear 2 and the bearing 8. A bendable claw 101 is arranged around the outer edge of the washer 1 (the claw 101 is initially located within the gear gap; there is a small gap between the claw 101 and the bearing 8, and a gap between the claw 101 and the wall of the central hole of the reverse drive gear 7). After bending, the claw 101 can engage between adjacent teeth of the nut gear 2 (one claw 101 can engage between two adjacent teeth of the nut gear 2), thus preventing the nut gear 2 from loosening (the washer 1 and the inner ring of the bearing 8 are fixed to each other, so the washer 1 itself will not rotate).
[0017] During assembly, bearing 8, washer 1, nut, and gear 2 are arranged in sequence from bottom to top.
[0018] In the first pre-pushing process, the worker holds the main pry bar 3 and inserts the front end of the pry head plate 402 between the bottom surface of the pawl 101 and the upper end of the bearing 8 (because the gap between the pawl 101 and the bearing 8 is not large, the pry head plate 402 cannot be fully extended and cannot contact the root of the pawl 101). The bottom of the main pry bar 3 contacts the top of the inner ring of the reverse drive gear 7 (the position where the bottom of the main pry bar 3 contacts the top of the inner ring of the reverse drive gear 7 can be understood as the "rotation fulcrum" of the main pry bar 3). At this time, the pawl 101 to be pushed is between the two limiting plates 5. In this way, the pawl 101 can limit the swaying of the two limiting plates 5 and the main pry bar 3 in the horizontal direction, so that the contact between the front end of the pry head plate 402 and the pawl 101 is more balanced and stable. The path and process of the pry head plate 402 pushing the pawl 101 can also be more stable. Thus, the pawl 101 is not prone to local twisting or deformation. The pawl 101 can move towards and enter the space between two adjacent teeth of the nut gear 2 as a whole. When pushed, this utility model rotates along the "rotation fulcrum" mentioned above in this paragraph, thereby naturally pushing the pawl 101 to move. After pushing a certain distance, the front ends of the two pawls 401.1 will rotate to the position of "attaching to the tooth tip surface 2a of the two adjacent teeth of the nut gear 2" (the front end of one pawl 401.1 abuts to the tooth tip surface 2a of one tooth, and the front end of the other pawl 401.1 abuts to the tooth tip surface 2a of another tooth, at which point the pawl 101 also initially enters between the adjacent teeth of the nut gear 2). In this way, when the worker pre-pushes, there is no need to be hesitant (worried about pushing too far or pushing too far), and the pushing distance can be ensured to be sufficient.
[0019] During the second step of the contact and prying process, due to the pre-prying in the first step, the gap between the pawl 101 and the bearing 8 increases, allowing the front end of the pry bar 402 to extend fully. The worker holds the main pry bar 3 and inserts the front end of the pry bar 402 to the position contacting the root of the pawl 101. At this point, the operation is no longer the aforementioned rotation along the "pivot point," but rather a direct prying motion where the upper part of the front end of the pry bar 402 is against the pawl 101, i.e., prying and pushing the pawl 101 from bottom to top until it contacts the root surface 2b of the nut gear 2, until the pry bar 402 sweeps and presses over the entire pawl 101 from bottom to top, thus allowing the pawl 101 to contact the root surface 2b of the nut gear 2. During this process, because the rotation has been changed to a prying motion, the limiting plate 5 will not contact the top surface 2a of the nut gear 2. Because of the pre-pulling, the pawl 101 has initially entered the adjacent teeth of the nut gear 2, so the front end of the pry bar 402 also works between the adjacent teeth of the nut gear 2. At this time, the adjacent teeth of the nut gear 2 limit the pry bar 402 in the horizontal direction, which can limit the shaking of the main pry bar 3, help stabilize the operator's operation, and ensure that the pawl 101 can finally smoothly abut against the tooth root surface 2b of the nut gear 2.
[0020] It also includes a secondary pry bar 6, one end of which is fixed to the middle of the main pry bar 3, and the other end of which is the tail end of the secondary pry bar. The bending pry head 4, the fixed end of the secondary pry bar, the tail end of the secondary pry bar and the tail end 3a of the main pry bar 3 are arranged in sequence along the length of the main pry bar 3. The angle between the secondary pry bar 6 and the main pry bar 3 is 30 to 45 degrees.
[0021] The secondary lever 6 allows workers to operate with both hands (one hand holding the main lever 3 and the other hand holding the secondary lever 6), reducing the difficulty of operation and improving the stability of the operation process.
[0022] The thinnest end of the pry bar 402 is the entry end 402a402a, which is used to insert into the gap between the pawl 101 and the reverse drive gear. The entry end 402a, any limiting plate 5 and the tail end 3a of the main rod are arranged in sequence along the length of the main pry bar 3. The surface of the pry bar 402 that is used to contact the pawl 101, any limiting plate 5 and the auxiliary pry bar 6 are arranged in sequence along the thickness direction of the pry bar 402.
[0023] As can be seen, the entry end 402a is the front end of the pry bar 402 mentioned earlier. The thickness of the pry bar 402 varies (it is not uniform throughout), which allows it to better adapt to smaller gaps and ensures smooth operation.
[0024] One end of the main pry bar 3 is provided with a slot 3b. The pry head base 401 is provided with a plate 401.1 located in the slot 3b. The plate 401.1 is provided with a fixing screw 401.2 that passes through the main pry bar 3 and is used to press the main pry bar 3. The fixing screw 401.2 is threadedly engaged with the plate 401.1. The fixing screw 401.2 is provided with a fixing nut 401.3 that is threadedly engaged with the fixing screw 401.2 and is used to press the main pry bar 3. The axial direction of the fixing screw 401.2 is parallel to the thickness direction of the pry head plate 402.
[0025] The clamping plate 401.1 and the pry head base 401 are secured using the fixing screws 401.2 and the fixing nuts 401.3. Therefore, the pry head base 401 (bending pry head 4) can be quickly disassembled and replaced. Since the bending pry head 4 itself is one of the most easily damaged structures, this design allows for quick replacement of certain components, reducing costs.
[0026] The distance between the two limiting plates 5 is the same as the width of the claw 101. The limiting plate 5 is provided with a limiting screw 501 that passes through the limiting plate 5 and presses against the limiting plate 5. The limiting screw 501 is threadedly fixed to the main pry bar 3.
[0027] The limiting plate 5 can be quickly disassembled and replaced. The distance between the two limiting plates 5 is the same as the width of the claw 101, which makes it easier to use the strength of the claw 101 in the width direction (the claw 101 is relatively wide but very thin) to assist in limiting the limiting plate 5 and even the present invention, thereby improving the stability during operation and ensuring the assembly quality.
[0028] The embodiments of this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.
Claims
1. A bending device for the claws of an internal washer in an automatic transmission, used to push the claws on the washer into the space between adjacent teeth of the nut gear; characterized in that, It includes a main pry bar, a bent pry head located at one end of the main pry bar, and a pre-limiting structure located on the main pry bar; The other end of the main pry bar is the tail end of the main bar. The bending pry head includes a pry head seat and a pry head plate disposed on the pry head seat. The pry head plate, the pry head seat and the tail end of the main bar are arranged sequentially along the length direction of the main pry bar. The width direction of the pry head plate is perpendicular to the thickness direction of the pry head seat, the width direction of the pry head plate is perpendicular to the length direction of the main pry bar, and the thickness direction of the pry head plate is perpendicular to the length direction of the main pry bar. The width of the pry bar is consistent throughout, and the thickness of the pry bar gradually decreases from near the pry bar seat to far away from the pry bar seat. The pre-limiting structure includes two parallel limiting plates for contacting the top surface of the nut gear teeth. The space between the two limiting plates is the plate gap. A part of the pry bar is located in the plate gap, and a part of the main pry bar is located in the plate gap.
2. The automatic transmission inner washer claw bending device according to claim 1, characterized in that, It also includes a secondary pry bar, one end of which is fixed to the middle of the main pry bar, and the other end of which is the tail end of the secondary pry bar. The bending pry bar, the fixed end of the secondary pry bar, the tail end of the secondary pry bar, and the tail end of the main pry bar are arranged sequentially along the length of the main pry bar. The angle between the secondary pry bar and the main pry bar is 30 to 45 degrees.
3. The device according to claim 2, wherein the device is characterized by, The thinnest end of the pry bar is the entry end for inserting into the gap between the pawl and the reverse gear. The entry end, any limiting plate, and the tail end of the main rod are arranged sequentially along the length of the main pry bar. The surface of the pry bar that contacts the pawl, any limiting plate, and the auxiliary pry bar are arranged sequentially along the thickness direction of the pry bar.
4. The device according to claim 1 or 2 or 3, wherein, One end of the main pry bar is provided with a slot, and the pry head base is provided with a card plate located in the slot. The card plate is provided with a fixing screw that passes through the main pry bar and is used to press the main pry bar. The fixing screw is threadedly engaged with the card plate. The fixing screw is provided with a fixing nut that is threadedly engaged with the fixing screw and is used to press the main pry bar. The axial direction of the fixing screw is parallel to the thickness direction of the pry head plate.
5. The device as claimed in claim 1 or 2 or 3, wherein the device is characterized in that, The distance between the two limiting plates is the same as the width of the chuck. The limiting plates are equipped with limiting screws that pass through and press against the limiting plates. The limiting screws are threadedly fixed to the main pry bar.