High-precision steel wheel vehicle gear clamping jaw

Abstract

The utility model provides a high accuracy steel wheel wheel car tooth dog, relate to steel wheel dog technical field, include: hydraulic chuck, its multiple movable end all is connected with the sliding block, the sliding block is as the executing end of hydraulic chuck can be close to or is far from hydraulic chuck center, a plurality of dog, every dog passes through the sliding block with the interference fit of hydraulic chuck, the dog is towards the one end of hydraulic chuck center and has seted up first clamping groove and second clamping groove, the utility model has the advantages that: through the interference fit of dog and chuck sliding block, and the cooperation clearance needs control very small range, makes the clamping activity accuracy of dog accurate, through the special in dog clamping position root part design heterotypic avoidance groove, can reduce the deformation that stress concentrates in clamping position root part causes to increase the reuse frequency, and according to this kind of method, can make multiple specifications similar dog, satisfies production demand.

Description

Technical Field

[0001] This utility model relates to the field of steel wheel chuck technology, and in particular to a high-precision steel wheel tooth chuck. Background Technology

[0002] In industrial production, steel wheels, as key components in harmonic reducers, typically mesh with flexible gears to achieve precise motion transmission. The machining of steel wheels demands extremely high precision, often requiring imported gear-turning machines. Meanwhile, the commonly used chucks are mostly imported products. While their performance may meet basic usage requirements to a certain extent, they are inherently consumables, and the materials they use lack heat treatment. This makes them highly susceptible to deformation during frequent use, significantly shortening their lifespan.

[0003] A deeper analysis from a technical application perspective reveals a particularly prominent issue with the insufficient reusability of existing chucks. Due to their easily deformable nature, the accuracy and performance of the chucks decrease to some extent after each use. This means that in actual production, companies need to frequently replace the chucks, which not only increases production costs but also significantly reduces production efficiency due to the debugging and other steps involved in chuck replacement. Furthermore, the short lifespan of the chucks makes it difficult to maintain a stable and reliable working state during long-term, high-intensity machining tasks, further restricting the smoothness and efficiency of the entire machining process. Utility Model Content

[0004] In view of this, an embodiment of the present invention provides a high-precision steel wheel tooth chuck.

[0005] An embodiment of this utility model provides a high-precision steel wheel turning tooth chuck for clamping steel wheels, comprising:

[0006] A hydraulic chuck has sliders on multiple movable ends. The sliders are evenly arranged on the hydraulic chuck along a circumferential trajectory. The sliders, as the actuators of the hydraulic chuck, can move closer to or further away from the center of the hydraulic chuck.

[0007] Multiple jaws are provided, each jaw being interference-fitted with the hydraulic chuck via a slider. A first clamping groove and a second clamping groove are provided at the end of each jaw facing the center of the hydraulic chuck. Both the second clamping groove and the first clamping groove have clearance grooves at their roots. These clearance grooves are concave and irregularly shaped, surrounding the roots of the clamping grooves and communicating with them. The hydraulic chuck drives the multiple sliders to slide, causing the jaws on each slider to clamp the steel wheel via the second clamping groove.

[0008] Furthermore, a vertical groove is provided at the bottom of the claw, the slider is inserted into the vertical groove, a slide bar is provided on the surface of the slider, and a horizontal groove is also provided at the bottom of the claw, the slide bar is inserted into the horizontal groove.

[0009] Furthermore, the slide bar and the slider together form a cross shape, and the vertical groove and the horizontal groove are connected to form a corresponding cross-shaped groove, so as to ensure that the interference fit clearance between the jaw and the hydraulic chuck meets the requirements.

[0010] Furthermore, the first clamping groove includes a first clamping groove recess and a small circular wall, and the second clamping groove includes a second clamping groove recess and a large circular wall. The first clamping groove recess and the small circular wall, as well as the second clamping groove recess and the large circular wall, are all connected by clearance grooves.

[0011] Furthermore, an M6 countersunk hole is formed through the claw, and a threaded hole corresponding to the countersunk hole is formed on the slider. An internal hexagon screw with a threaded fit into the threaded hole passes through the countersunk hole.

[0012] Furthermore, the number of jaws is six, and the six jaws are arranged at equal intervals around the circumference on the hydraulic chuck.

[0013] Furthermore, the first clamping groove and the second clamping groove are concentrically arranged.

[0014] Furthermore, the diameter of the second clamping groove is larger than the diameter of the steel wheel, and the diameter of the second clamping groove exceeds the diameter of the steel wheel by 0.05-0.1 mm.

[0015] Furthermore, the movable end of the hydraulic chuck is connected to the slider via a sliding mechanism.

[0016] The beneficial effects of the technical solution provided by the embodiments of this utility model are as follows: The high-precision steel wheel turning tooth chuck of this utility model, through the interference fit between the chuck and the chuck slider, and the need to control the fit clearance within a very small range, makes the clamping movement of the chuck accurate; by designing a special-shaped relief groove at the root of the chuck clamping position, the deformation caused by stress concentration at the root of the clamping position can be reduced, thereby increasing the number of reuses. Based on this approach, chucks of the same type in various specifications can be manufactured to meet production needs; at the same time, heat treatment is used to achieve a certain hardness for use, ensuring that it will not deform and lose precision during long-term repeated use, and its batch processing accuracy can be controlled at level 5-6. Attached Figure Description

[0017] Figure 1 This is a three-dimensional view of the high-precision steel wheel tooth chuck of this utility model;

[0018] Figure 2This is a longitudinal cross-sectional view of the high-precision steel wheel tooth chuck of this utility model;

[0019] Figure 3 This is a three-dimensional view of the jaw structure of the high-precision steel wheel tooth chuck of this utility model;

[0020] Figure 4 This is a partial enlarged view of the clearance groove of the high-precision steel wheel tooth chuck of this utility model.

[0021] In the diagram: 1. Hydraulic chuck; 2. Slider; 21. Slide bar; 22. Threaded hole; 3. Claw; 31. First clamping groove; 311. First clamping groove countersunk platform; 312. Small circular wall; 32. Second clamping groove; 321. Second clamping groove countersunk platform; 322. Large circular wall; 33. Clearance groove; 34. Countersunk hole; 35. Vertical groove; 36. Horizontal groove; 4. Socket head screw; 5. Steel wheel; 6. Hydraulic expansion mandrel core. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be further described below with reference to the accompanying drawings. The following description presents a preferred embodiment of several possible embodiments of this utility model, intended to provide a basic understanding of the utility model, but not intended to identify the key or decisive elements of the utility model or to limit the scope of protection sought.

[0023] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0024] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0025] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures. Also, it should be understood that, for ease of description, the dimensions of the various parts shown in the figures are not drawn to actual scale.

[0026] In the description of this utility model, it should be noted that the circuits, electronic components and modules involved in this utility model are all existing technologies, which can be fully implemented by those skilled in the art, and need not be elaborated. The content protected by this utility model does not involve any improvement to the internal structure and method.

[0027] It should be noted that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] Please refer to Figure 1-4 Example 1: An embodiment of this utility model provides a high-precision steel wheel turning tooth chuck, including a hydraulic chuck 1, multiple sliders 2 and multiple jaws 3.

[0029] The hydraulic chuck 1 has multiple movable ends connected to sliders 2, which can be connected by a sliding mechanism. The sliders 2 connected to the hydraulic chuck 1 serve as the actuators of the hydraulic chuck 1. They can move closer to or further away from the center of the hydraulic chuck 1 under the drive of the hydraulic chuck 1, so as to control the gripper 3 connected to the sliders 2 to hold the steel wheel 5.

[0030] It should be noted that each jaw 3 is interference-fitted with the hydraulic chuck 1 via the slider 2. In specific implementation, the bottom of the jaw 3 is provided with a vertical groove 35, and the slider 2 is inserted into the vertical groove 35; the surface of the slider 2 is provided with a slide bar 21, and the bottom of the jaw 3 is also provided with a horizontal groove 36, and the slide bar 21 is inserted into the horizontal groove 36.

[0031] It is understandable that the slider 21 and the slide block 2 together form a cross shape, and the vertical groove 35 and the horizontal groove 36 are connected to form a cross-shaped groove, ensuring that the interference fit clearance between the chuck 3 and the hydraulic chuck 1 meets the requirements, thereby improving the installation accuracy and stability of the chuck 3.

[0032] In this embodiment, the end of the claw 3 facing the center of the hydraulic chuck 1 is provided with a first clamping groove 31 and a second clamping groove 32. Both grooves are provided with avoidance grooves 33 at their roots to ensure that the claw 3 can effectively avoid and reduce damage to the steel wheel when clamping the steel wheel. The hydraulic chuck 1 drives the slider 2 to slide, thereby causing the claw 3 on each slider 2 to clamp the steel wheel 5.

[0033] It should be noted that the diameter of the second clamping groove 32 is larger than the diameter of the steel wheel 5, and the diameter of the second clamping groove 32 exceeds the diameter of the steel wheel 5 by 0.05-0.1 mm.

[0034] Specifically, the clearance groove 33 has a concave irregular structure, surrounds the root of the clamping groove 32, and is connected to the clamping groove 32 and the clamping groove 31. Its shape fits the contour of the root of the clamping position. The concave design reduces stress concentration and the risk of deformation at the root of the clamping position, thereby increasing the number of times the chuck can be reused.

[0035] Example 2: The first clamping groove 31 includes a first clamping groove recess 311 and a small circular wall 312, and the second clamping groove 32 includes a second clamping groove recess 321 and a large circular wall 322, which are used to clamp the steel wheel. The first clamping groove recess 311 and the small circular wall 312, and the second clamping groove recess 321 and the large circular wall 322 are all transitioned by a relief groove 33 to achieve a smooth transition, reduce stress concentration, and improve the service life of the chuck 3.

[0036] In one optional implementation, multiple jaws 3 are precision-machined. Jaws 3 without the first clamping groove 31 and the second clamping groove 32 are installed on the slider 2. Before installation, the cross positioning surface of the slider 2 must be cleaned. Then, the small circular walls 312 on the inner side of multiple jaws 3 are precision-machined. At this time, the first clamping groove 31 can be adjusted by using the hydraulic expansion mandrel core 6 as a standard block. When the size of the first clamping groove countersunk platform 311 is 0.1mm larger than the hydraulic expansion mandrel core 6, the hydraulic expansion mandrel core 6 can be placed into multiple first clamping grooves 31, thereby determining the size of the first clamping groove 31. Then, the second clamping groove 32 is precision-machined in the same way. With the hydraulic expansion mandrel core 6 held in place, the size of the second clamping groove 32 is determined to be 0.05-0.1mm larger than the inner diameter of the steel wheel 5. The precision-machined forming of the jaws 3 is then completed. The size of the second clamping groove 32 is adjusted according to the change of the inner diameter of the steel wheel 5 to ensure the use requirements of the non-standard steel wheel 5.

[0037] It should be noted that the surface roughness of the second clamping groove 32 is 1.6, which can prevent the steel wheel 5 from being damaged. The radial runout and end runout generated by the jaws 3 clamping the steel wheel after fine repair are both guaranteed to be within 0.005mm.

[0038] Understandably, after fine finishing, the chuck 3 also needs to undergo heat treatment to achieve a hardness of HRC40-45 in order to prevent deformation.

[0039] In order to connect the claw 3, an M6 countersunk hole 34 is provided through the claw 3, and a corresponding threaded hole 22 is provided on the slider 2. An internal hex screw 4 passes through the countersunk hole 34 and engages with the threaded hole 22 on the slider 2, thereby firmly fixing the claw 3 to the slider 2.

[0040] This connection method not only facilitates installation and disassembly, but also ensures that the chuck 3 will not loosen when subjected to force, thus guaranteeing machining accuracy and stability.

[0041] In an optional embodiment, the number of jaws 3 is six, equidistantly arranged on the hydraulic chuck 1, forming a uniform clamping force distribution. This arrangement helps improve the clamping accuracy of the steel wheel, ensuring its stability during processing, reducing vibration and offset, thereby improving processing accuracy and surface quality.

[0042] In addition, the first clamping groove 31 and the second clamping groove 32 are concentrically arranged to achieve precise positioning and clamping of the steel wheel, thereby further improving the processing accuracy.

[0043] In this document, the directional terms such as front, back, top, and bottom are defined based on the position of the components in the accompanying drawings and their relative positions to each other, solely for the purpose of clarity and convenience in expressing the technical solution. It should be understood that these are relative concepts and can vary depending on different methods of use and placement; the use of these directional terms should not limit the scope of protection claimed in this application.

[0044] Where there is no conflict, the above embodiments and features described herein can be combined with each other.

[0045] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A high-precision steel wheel tooth chuck for clamping a steel wheel (5), characterized in that, include: A hydraulic chuck (1) has multiple movable ends equipped with sliders (2). The multiple sliders (2) are evenly arranged on the hydraulic chuck (1) along a circular trajectory. The sliders (2) serve as the execution ends of the hydraulic chuck (1) and can move closer to or further away from the center of the hydraulic chuck (1). Multiple jaws (3) are provided. Each jaw (3) is press-fitted with the hydraulic chuck (1) through the slider (2). The jaw (3) has a first clamping groove (31) and a second clamping groove (32) at one end facing the center of the hydraulic chuck (1). Both the second clamping groove (32) and the first clamping groove (31) have clearance grooves (33) at their roots. The clearance grooves (33) have a concave irregular structure, surround the root of the second clamping groove (32), and are connected to the second clamping groove (32) and the first clamping groove (31). The hydraulic chuck (1) drives the multiple sliders (2) to slide, so that the jaw (3) on each slider (2) clamps the steel wheel (5) through the second clamping groove (32).

2. The high-precision steel wheel turning tooth chuck as described in claim 1, characterized in that: The bottom of the claw (3) is provided with a vertical groove (35), the slider (2) is inserted into the vertical groove (35) in a corresponding manner, the surface of the slider (2) is provided with a slide bar (21), the bottom of the claw (3) is also provided with a horizontal groove (36), the slide bar (21) is inserted into the horizontal groove (36) in a corresponding manner.

3. The high-precision steel wheel turning tooth chuck as described in claim 2, characterized in that: The slide bar (21) and the slider (2) together form a cross shape, and the vertical groove (35) and the horizontal groove (36) are connected to form a corresponding cross-shaped groove to ensure that the interference fit clearance between the chuck (3) and the hydraulic chuck (1) meets the requirements.

4. The high-precision steel wheel turning tooth chuck as described in claim 1, characterized in that: The first clamping groove (31) includes a first clamping groove recess (311) and a small circular wall (312), and the second clamping groove (32) includes a second clamping groove recess (321) and a large circular wall (322). The first clamping groove recess (311) and the small circular wall (312) as well as the second clamping groove recess (321) and the large circular wall (322) are all connected by the clearance groove (33).

5. The high-precision steel wheel turning tooth chuck as described in claim 1, characterized in that: The claw (3) has an M6 countersunk hole (34) through it, and the slider (2) has a threaded hole (22) corresponding to the countersunk hole (34). An internal hexagon screw (4) with a threaded fit to the threaded hole (22) passes through the countersunk hole (34).

6. The high-precision steel wheel turning tooth chuck as described in claim 1, characterized in that: The number of the jaws (3) is six, and the six jaws (3) are arranged at equal intervals around the circumference on the hydraulic chuck (1).

7. The high-precision steel wheel turning tooth chuck as described in claim 1, characterized in that: The first clamping groove (31) and the second clamping groove (32) are concentrically arranged.

8. The high-precision steel wheel turning tooth chuck as described in claim 1, characterized in that: The diameter of the second clamping groove (32) is larger than the diameter of the steel wheel (5), and the diameter of the second clamping groove (32) is 0.05-0.1 mm larger than the diameter of the steel wheel (5).

9. The high-precision steel wheel turning tooth chuck as described in claim 1, characterized in that: The movable end of the hydraulic chuck (1) is connected to the slider (2) via a sliding mechanism.

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