A flexible shift detection tool

Abstract

The utility model belongs to gear shifting detection technical field discloses a kind of flexible gear shifting detection tool, including base, rotary support assembly, compression mechanism and radial limiting structure, rotary support assembly, including the support seat for carrying workpiece and the low-friction rotating support structure being located between support seat and base, support seat is rotatably set on base by low-friction rotating support structure, compression mechanism is set at the top of support seat, radial limiting structure is set at the side of the support seat;The utility model can completely solve the gear shifting jamming problem caused by the large frictional resistance of traditional tool, radial positioning inaccuracy, ensure that detection action is continuous and stable;It can also protect workpiece from clamping, limiting, rotating multiple links, effectively avoid the surface damage problem easily caused by traditional tool.

Description

Technical Field

[0001] This utility model relates to the field of gear shift detection tooling technology, specifically to a flexible gear shift detection tooling. Background Technology

[0002] The gear shifting test fixture is a specialized device used for testing the gear shifting performance of automotive transmissions. Its core function is to accurately verify the smoothness, accuracy, and reliability of gear shifting operations, thereby ensuring the quality of the transmission before it leaves the factory.

[0003] Existing gear shifting testing fixtures generally employ a traditional mechanical solution of "end face support and pressure plate clamping" to perform testing on workpieces (such as synchronizers). Specifically, this solution involves directly supporting the bottom of the workpiece with the rigid end face of the fixture and using the pressure plate above to apply vertical downward pressure to fix the workpiece in place.

[0004] However, this "hard friction" clamping and support mode has revealed a series of inherent technical defects in practical applications. The most critical problem is that while axially clamping the workpiece, it also introduces enormous resistance to the workpiece's circumferential rotation. When performing shift tests, i.e., driving the workpiece to rotate around its axis, the enormous static friction makes initial rotation extremely difficult, often resulting in jamming. This prevents the shift operation from being completed smoothly, or even from starting at all, affecting not only testing efficiency but also potentially damaging the workpiece or drive mechanism due to the instantaneous excessive driving force. At the same time, the direct metal-to-metal contact and hard friction between the workpiece and the rigid end face and pressure plate easily cause scratches, indentations, and other damage to the workpiece's finished surface, seriously affecting the product's appearance quality and even its performance, resulting in unnecessary scrap and losses.

[0005] Therefore, there is an urgent need for a new technology that can solve the problems of jamming and damage such as scratches and indentations on the finished surface of the workpiece. Utility Model Content

[0006] The purpose of this utility model is to provide a flexible shift detection fixture to overcome the problems existing in the prior art. This utility model can completely solve the shift jamming problem caused by the large frictional resistance and inaccurate radial positioning of traditional fixtures, and ensure continuous and stable detection action; it can also protect the workpiece from multiple links such as clamping, limiting and rotation, and effectively avoid the surface damage problem that is easily caused by traditional fixtures.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows: This utility model provides a flexible gear shift detection fixture, including: Base; A rotary support assembly includes a support base for supporting a workpiece and a low-friction rotary support structure disposed between the support base and a base, wherein the support base is rotatably mounted on the base via the low-friction rotary support structure. A clamping mechanism is provided on the top of the support base and is used to axially clamp the workpiece onto the support base; A radial limiting structure is provided on the side of the support base to radially limit the workpiece placed on the support base.

[0008] In some embodiments, the low-friction rotating support structure includes a plurality of omnidirectional balls evenly distributed at the bottom of the support base, and the support base is rotatably mounted on the base via the plurality of omnidirectional balls.

[0009] In some embodiments, a plurality of the omnidirectional balls are evenly distributed along the circumferential direction of the bottom of the support base.

[0010] In some embodiments, the difference in central angle between two adjacent omnidirectional balls does not exceed 5°.

[0011] In some embodiments, the clamping mechanism includes at least two manual elbow clamps disposed on top of the support base.

[0012] In some embodiments, the number of manual elbow clamps is two.

[0013] In some embodiments, two manual elbow clamps are symmetrically arranged on the top of the support base.

[0014] In some embodiments, the radial limiting structure includes at least one limiting post disposed on the side of the support base.

[0015] In some embodiments, the support base and the base are radially positioned through a hole-shaft fit.

[0016] In some embodiments, a drive mechanism is also included, disposed on the top of the support base, for driving the clamped workpiece to perform a gear shifting action.

[0017] The above technical solution has the following advantages or beneficial effects: This utility model provides a flexible shifting detection fixture. First, the rotating support assembly adopts a low-friction rotating support structure, using a universal ball joint to achieve a rotatable connection between the support seat and the base, significantly reducing the frictional resistance during the rotation of the support seat. Simultaneously, the support seat and base achieve precise radial positioning through a hole-shaft fit, preventing radial movement or tilting of the support seat. This combination allows the workpiece to rotate smoothly and synchronously with the support seat during shifting detection, completely solving the shifting jamming problem caused by high frictional resistance and inaccurate radial positioning in traditional fixtures, ensuring continuous and stable detection. Second, the clamping mechanism uses a manual elbow clamp, which can adjust the clamping force to adapt to the force requirements of different workpieces, avoiding indentations on the workpiece surface due to excessive clamping force. The radial limiting structure achieves positioning by the limiting post abutting against the workpiece laterally, contacting only the non-finished side of the workpiece and not touching the finished surface. Furthermore, the low-friction rotating support structure reduces frictional wear during workpiece rotation, further preventing scratches on the finished surface. The overall structure of this application protects the workpiece from multiple aspects—clamping, limiting, and rotation—effectively avoiding surface damage problems easily caused by traditional fixtures. Finally, there is no need to design special tooling for workpieces of different specifications. By adjusting the distribution of the universal ball, the position of the limit post and the clamping force of the elbow clamp, it can adapt to the inspection needs of various workpieces. While ensuring that the workpiece is undamaged and shifting is smooth, it reduces the frequency of tooling changes and improves inspection efficiency and cost economy.

[0018] In some embodiments, the rolling characteristics of the omnidirectional ball significantly reduce the rotational friction resistance of the support seat. Combined with the uniform distribution design, the support seat is subjected to balanced force, avoiding rotational jamming caused by local pressure concentration. This ensures that the workpiece rotates smoothly and synchronously with the support seat, reducing the risk of jamming during gear shifting and testing from the root. The omnidirectional ball is flexible in installation and highly adaptable. Its quantity and distribution range can be adjusted according to the size of the support seat, without being limited by the fixed installation specifications of the bearing. At the same time, it avoids the support seat deformation problem caused by the outer ring being suspended and uneven pressure in traditional bearings, extending the service life of the tooling and reducing maintenance costs.

[0019] In some embodiments, the difference in the central angle between two adjacent universal balls does not exceed 5°, which ensures that each universal ball forms a high-precision uniform distribution at the bottom of the support base. This allows the supporting force on the support base to achieve a near-ideal circumferential uniform distribution, minimizing local stress concentration. The high-precision distribution method can control the fluctuation of frictional resistance during rotation to a very small range, avoiding rotational jerks caused by abnormal force on individual universal balls. This ensures that the support base rotates smoothly and synchronously with the workpiece shifting action, effectively eliminating detection errors caused by uneven support, while reducing the risk of deformation of the support base after long-term use, and significantly improving the detection accuracy and service life of the tooling.

[0020] In some embodiments, the clamping mechanism employs at least two manual elbow clamps mounted on top of the support base. On one hand, the manual elbow clamps offer convenient manual operation, allowing for rapid axial clamping and loosening of the workpiece without the need for a complex electrical control system, significantly reducing workpiece clamping time and improving inspection efficiency. On the other hand, the clamping force of the manual elbow clamps can be flexibly adjusted through the operating force, adapting the clamping strength to the stress tolerance of different workpiece finish surfaces. This effectively prevents indentations on the workpiece surface due to excessive clamping force, while ensuring no axial displacement of the workpiece during gear shifting inspection after clamping. This not only guarantees inspection stability but also protects the finish surface of the workpiece, solving the problem of workpiece damage caused by traditional rigid clamping mechanisms.

[0021] In some embodiments, two manual elbow clamps are used to form symmetrical and balanced axial pressure on the top of the support base through two-point clamping. Compared with single-point clamping of a single elbow clamp, this avoids local deformation of the workpiece due to force concentration and prevents the workpiece from deflecting around a single point during gear shifting detection, ensuring that the workpiece always maintains a stable posture. The configuration of two elbow clamps can also reduce the clamping force required by a single elbow clamp while ensuring clamping reliability, further reducing the pressure on the finished surface of the workpiece, effectively avoiding the risk of indentation, and balancing detection stability and workpiece protection.

[0022] In some embodiments, two manual elbow clamps are symmetrically arranged on the top of the support base, which enables the clamping force to be symmetrically distributed along the central axis of the support base. This ensures that the axial pressure on the workpiece is evenly applied to its contact surface, completely avoiding the problem of workpiece force imbalance caused by single-point or asymmetrical clamping. The symmetrical layout can effectively prevent the workpiece from shifting or tilting during the clamping process, ensuring the accurate relative position of the workpiece with the support base and drive mechanism. This ensures that the shift detection action can be accurately applied to the designated part of the workpiece, reducing detection errors caused by workpiece position deviation. At the same time, the uniform clamping force can also prevent the workpiece from being subjected to excessive pressure locally, preventing indentations on its finished surface. This balances detection accuracy and workpiece protection, improving the overall detection reliability of the tooling.

[0023] In some embodiments, the radial limiting structure employs at least one limiting post located on the side of the support base. On one hand, the limiting post achieves radial positioning by abutting against the side of the workpiece, eliminating the need to contact the finished surfaces of the top or bottom of the workpiece and avoiding the risk of scratching critical precision surfaces of the workpiece at the contact point. On the other hand, the limiting post has a simple structure and adjustable position, allowing for flexible adjustment of the installation position according to the radial dimensions of workpieces of different specifications. It can adapt to the limiting requirements of various workpieces without replacing the entire limiting assembly, solving the problems of poor compatibility and frequent workpiece damage caused by traditional dedicated limiting structures. At the same time, the setting of one or more limiting posts can accurately control the radial deviation of the workpiece, ensuring precise alignment between the workpiece and the shifting position of the drive mechanism, reducing detection errors caused by radial offset, and balancing workpiece protection, adaptability, and detection accuracy.

[0024] In some embodiments, the support base and the base are radially positioned through a hole-shaft fit, which can precisely limit the radial displacement and sway of the support base, prevent radial movement during the rotation of the workpiece, and ensure that the support base always maintains a stable center of rotation. It can also keep the relative position of the support base and the base fixed, ensuring that the low-friction rotating support structure, the drive mechanism and the workpiece are accurately aligned, preventing misalignment of shifting action or rotation jamming caused by radial offset. This not only improves the accuracy of the detection action, but also further ensures the stability of the workpiece during rotation detection, and reduces the detection error and workpiece damage risk caused by positioning deviation. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of a flexible gear shifting detection fixture structure according to some embodiments of this specification; In all the accompanying drawings, the same reference numerals denote the same technical features, specifically: 1. base; 2. support base; 3. omnidirectional ball; 4. manual elbow clamp; 5. limiting post. Detailed Implementation

[0026] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this invention. Therefore, the drawings and description are considered exemplary in nature and not restrictive.

[0027] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0028] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0029] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0030] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0031] 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] Example: This utility model provides a flexible shift detection fixture that can completely solve the shift jamming problem caused by high frictional resistance and inaccurate radial positioning of traditional fixtures, ensuring continuous and stable detection action; it can also protect the workpiece from multiple aspects such as clamping, limiting, and rotation, effectively avoiding the surface damage problem that is easily caused by traditional fixtures.

[0033] Figure 1 This is a schematic diagram of a flexible shift detection fixture structure according to some embodiments of this specification. The flexible shift detection fixture includes a base 1, a rotary support assembly, a clamping mechanism, a radial limiting structure, and a driving mechanism. The rotary support assembly includes a support base 2 for supporting a workpiece and a low-friction rotary support structure disposed between the support base 2 and the base 1. The support base 2 is rotatably mounted on the base 1 via the low-friction rotary support structure. A clamping mechanism is disposed on the top of the support base 2 for axially clamping the workpiece onto the support base 2. A radial limiting structure is disposed on the side of the support base 2 for radially limiting the workpiece placed on the support base 2. A drive mechanism is disposed on the top of the support base 2 for driving the clamped workpiece to perform a shifting action.

[0034] In some embodiments, the low-friction rotating support structure includes a plurality of universal balls 3 evenly distributed at the bottom of the support base 2, and the support base 2 is rotatably mounted on the base 1 via the plurality of universal balls 3.

[0035] In some embodiments, multiple universal ball bearings are used for axial support. Compared with end face ball bearings, the latter is easier and more unrestricted to install. The number and distribution range can be increased as needed to ensure uniform distribution, resulting in uniform force on the support seat 2 and smoother rotation. However, with end face ball bearings, the outer ring of the support seat 2 is often suspended, resulting in uneven pressure distribution. During gear shifting, the support seat 2 may deform. Frequent use can lead to unreliable bearing installation, requiring tooling replacement.

[0036] In some embodiments, a plurality of the omnidirectional balls 3 are evenly distributed along the circumferential direction of the bottom of the support base 2.

[0037] In some embodiments, the difference in central angle between two adjacent omnidirectional balls 3 does not exceed 5°.

[0038] In some embodiments, the clamping mechanism includes at least two manual elbow clamps 4, which are disposed on the top of the support base 2.

[0039] In some embodiments, the number of manual elbow clamps 4 is two.

[0040] In some embodiments, two manual elbow clamps 4 are symmetrically arranged on the top of the support base 2.

[0041] In some embodiments, the radial limiting structure includes at least one limiting post 5, which is disposed on the side of the support base 2.

[0042] In some embodiments, the support base 2 and the base 1 are radially positioned by a hole-shaft fit. In order to ensure smooth rotation without shaking, the support base 2 and the base 1 are radially positioned by a hole-shaft fit. This fit has moderate precision, which can both constrain the radial movement and tipping risk of the support base 2, and will not hinder rotation due to excessive tightness, thus ensuring the stability and accuracy of torque transmission during gear shifting.

[0043] In some embodiments, the support 2 and the base 1 are fitted with appropriate precision to ensure smooth rotation without the risk of radial movement or tipping that could cause uneven rotation during gear shifting.

[0044] In some embodiments, the drive mechanism includes a cylinder disposed on top of the support 2.

[0045] In some embodiments, the cylinder is an electrically driven cylinder.

[0046] In some embodiments, the cylinder is connected to the shift fork or engagement cone ring of the workpiece, and the movement direction of its piston rod is consistent with the shifting direction. In the entire fixture, the cylinder is a fixed part independent of the rotatable support 2. When the workpiece is pressed onto the support 2, the cylinder is activated, and its piston rod extends or retracts, directly driving the shifting component of the workpiece. This overcomes the slight rolling friction of the universal ball 3, causing the entire "workpiece-support" system to rotate together, thus completing the shifting.

[0047] The structure and working principle of this utility model will be further explained below: The purpose of this utility model is to provide a flexible gear shifting detection fixture. When using this device, firstly, the manual elbow clamp 4 is in the loose state, then the workpiece to be tested is placed on the support base 2 and radially positioned by the limiting post 5; then, the manual elbow clamp 4 is operated to axially press the workpiece onto the support base 2; finally, the drive cylinder is started, so that the workpiece and the support base 2 rotate smoothly under the low friction support of the universal ball 3, thus completing the detection of the gear shifting action.

[0048] The flexible gear shifting testing fixture described in this application operates on the core principle of an innovative structure combining "low-friction rotational support" and "axial clamping and radial limiting separation." This structure significantly reduces rotational resistance during gear shifting testing while ensuring reliable workpiece fixation. Specifically, after the workpiece is placed on the support base 2, it is axially clamped by the top clamping mechanism, and its center position is accurately ensured by the radial limiting structure on the side. At this time, the low-friction support structure at the bottom of the support base 2, composed of multiple universal balls 3, allows the entire workpiece-support base 2 system to rotate smoothly around its axis under the action of the drive mechanism, overcoming only minimal rolling friction. This enables precise, efficient, and damage-free testing of the gear shifting action.

[0049] Traditional tooling uses end-face hard friction support, resulting in high rotational resistance. The key to this tooling lies in mounting the workpiece on a rotatable "platform"—the support base 2. The support base 2 and the base 1 are not in direct contact; instead, they are supported by a set of evenly distributed universal balls 3. When the cylinder drives the shift, the workpiece rotates the support base 2 together. At this time, the universal balls 3 roll on the base 1, converting sliding friction into rolling friction, thus achieving smooth rotation with minimal resistance and fundamentally solving the problems of jamming and workpiece scratches. The top clamping mechanism (such as a manual elbow clamp 4) provides axial clamping force. Its installation height can be adjusted according to the height of different workpieces to ensure that the clamping force is effectively applied to the workpiece while avoiding over-positioning. The side limiting posts 5 form a radial limiting structure. By adjusting the installation position of the limiting posts according to the diameter of the workpiece to be measured, the center of workpieces of different specifications can be quickly and accurately positioned, ensuring repeatability of positioning accuracy for each installation. This modular design of compression, limiting, and support gives the tooling strong compatibility, eliminating the need to manufacture dedicated tooling for each product and enabling "flexible" testing.

[0050] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0051] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that can be understood by those skilled in the art. The above content is only for illustrating the technical concept of this utility model and should not be used to limit the scope of protection of this utility model. Any modifications made to the technical solutions based on the technical concept proposed by this utility model shall fall within the scope of protection of the claims of this utility model.

Claims

1. A flexible gear shifting detection fixture, characterized in that, include: Base (1); The rotating support assembly includes a support base (2) for carrying a workpiece and a low-friction rotating support structure disposed between the support base (2) and the base (1), wherein the support base (2) is rotatably mounted on the base (1) via the low-friction rotating support structure. A clamping mechanism is provided on the top of the support base (2) for axially clamping the workpiece onto the support base (2); A radial limiting structure is provided on the side of the support base (2) for radially limiting the workpiece placed on the support base (2).

2. The flexible gear shifting detection fixture according to claim 1, characterized in that, The low-friction rotating support structure includes a plurality of universal balls (3) evenly distributed at the bottom of the support base (2), and the support base (2) is rotatably mounted on the base (1) through the plurality of universal balls (3).

3. The flexible gear shifting detection fixture according to claim 2, characterized in that, Several of the omnidirectional balls (3) are evenly distributed along the circumferential direction of the bottom of the support base (2).

4. The flexible gear shifting detection fixture according to claim 2, characterized in that, The difference in the central angle between two adjacent omnidirectional balls (3) shall not exceed 5°.

5. The flexible gear shifting detection fixture according to claim 1, characterized in that, The clamping mechanism includes at least two manual elbow clamps (4), which are disposed on the top of the support base (2).

6. The flexible gear shifting detection fixture according to claim 5, characterized in that, The number of manual elbow clamps (4) is two.

7. The flexible gear shifting detection fixture according to claim 6, characterized in that, The two manual elbow clamps (4) are symmetrically arranged on the top of the support base (2).

8. The flexible gear shifting detection fixture according to claim 1, characterized in that, The radial limiting structure includes at least one limiting post (5), which is disposed on the side of the support base (2).

9. The flexible gear shifting detection fixture according to claim 1, characterized in that, The support (2) and the base (1) are radially positioned by means of a hole-shaft fit.

10. The flexible gear shifting detection fixture according to claim 1, characterized in that, It also includes a drive mechanism, which is located on the top of the support base (2) and is used to drive the pressed workpiece to perform a shifting action.

Images