Steering wheel steering gear yoke spline machining alignment tool

Abstract

The utility model belongs to the technical field of machining, and particularly relates to a steering wheel steering gear yoke spline machining alignment tool which comprises a lower supporting plate and an upper supporting plate, a guide mechanism is arranged between the lower supporting plate and the upper supporting plate, a lower sliding plate is arranged on the guide mechanism, a positioning block is arranged on the lower sliding plate, a positioning hole is formed in the positioning block, and a first through hole is formed in the upper supporting plate. A reference block is arranged on the upper supporting plate, a second through hole is formed in the reference block, limiting holes are symmetrically formed in the two side walls of the opposite sides of the reference block, side face positioning needles are arranged in the limiting holes, a verification rod penetrates through the first through hole and the second through hole, and the bottom end of the verification rod is clamped in the positioning holes. A broach is replaced by a verification rod, a yoke is replaced by a reference block, the positions of a positioning block and a side positioning pin are fixed by positioning a limiting hole in the reference block through the side positioning pin and positioning a second through hole in the reference block through the verification rod, the yoke is positioned by the side positioning pin during machining, the broach is positioned by the positioning block, and the machining and remodeling operation efficiency is improved. The product processing precision is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of machining, in particular to a machining alignment tool for a steering wheel steering gear yoke spline. Background Art

[0002] The steering wheel steering gear yoke is an important component in the automobile steering system. It is used to connect the steering wheel input shaft and the universal joint. The overall yoke is a "U"-shaped structure. The bottom of the "U" shape is called the fork head, and the side walls on both sides are called fork ears. The fork ears on both sides are respectively provided with connecting ear holes so that the steering gear yoke can be hinged with the universal joint. The fork head is provided with an internal spline hole, and there is a key groove on the side of the internal spline hole to facilitate the transmission connection with the steering wheel input shaft.

[0003] At present, people usually use ordinary horizontal broaching machines to complete the processing of the internal splines of the yoke, but the yoke is formed by forging, and its surface has irregular characteristics. When the internal splines are processed by ordinary broaching machines and fork ear positioning, there is a problem of "poor processing quality" due to inaccurate positioning; in addition, when the existing broaching machines process the internal spline holes, the broaches are very likely to rotate, resulting in a high "scrap rate" problem; it cannot meet the production and use needs of enterprises.

[0004] Therefore, special tooling has been designed to improve the stability of the yoke clamping and positioning. However, the current tooling usually involves tapping and locking the slide rail on a support plate, placing a dial indicator on the slide rail to mark the flat position of the broach, leveling the flat position and then locking the broach positioning block, then using the dial indicator to mark the fork ear positioning, and then locking and fixing the fork ear positioning block after leveling. This positioning method is used for upper and lower alignment. During enterprise production, there are many types of yoke models. If the model needs to be replaced, the positions of the broach positioning block and the fork ear positioning block need to be re-determined. Therefore, this positioning method requires a lot of time to operate. In addition, when using the dial indicator to mark the position, due to the conversion of the measurement dimension reference during positioning, it is easy for the actual production size after alignment to exceed the error standard, resulting in unqualified products.

[0005] In view of the above problems, the utility model document proposes a steering wheel steering gear yoke spline processing alignment tool. Utility Model Content

[0006] The utility model provides a steering wheel steering gear yoke spline machining alignment tool, which reduces the difficulty of yoke positioning operation, improves work efficiency, facilitates rapid model change, and at the same time ensures product machining accuracy and improves product qualification rate.

[0007] The utility model provides the following technical solutions:

[0008] A steering wheel steering gear yoke spline processing alignment tooling comprises a lower support plate and an upper support plate, a guide mechanism is provided between the lower support plate and the upper support plate, a lower slide plate is slidably provided on the guide mechanism, a positioning block is detachably provided on the sliding plate, a positioning hole is opened on the positioning block, a first through hole is provided at a position corresponding to the positioning hole on the upper support plate, a reference block is provided at a position corresponding to the first through hole on the upper support plate, a second through hole connected with the through hole is provided on the reference block, and limiting holes are symmetrically provided on both side walls on opposite sides of the reference block, side positioning pins are movably provided in the limiting holes, a verification rod is penetrated through the first through hole and the second through hole, and the bottom end of the verification rod is clamped in the positioning hole.

[0009] Furthermore, the positioning block includes a positioning sleeve, a connecting plate is provided at the bottom end of the positioning sleeve, a threaded hole is provided on the connecting plate, a mounting hole is opened at a corresponding position of the lower slide plate, and the connecting plate is fixed to the lower slide plate by means of the threaded hole and the mounting hole and the matching bolts.

[0010] Furthermore, the guide mechanism includes guide columns, which are evenly arranged between the upper support portion and the lower support plate, and the guide columns penetrate the lower slide plate.

[0011] Furthermore, the side positioning pin is a cylindrical structure, and the edges of the ends adjacent to the reference block are rounded.

[0012] Furthermore, the central axis of the first through hole, the central axis of the second through hole and the central axis of the positioning hole are coaxially arranged.

[0013] Furthermore, the side walls at both ends and the side wall in the middle of the calibration rod are provided with positioning planes, and the positioning planes are located on the same vertical plane.

[0014] Furthermore, the two ends of the calibration rod are installation sections, and the middle part is a processing section, and the diameter of the processing section is larger than the diameter of the installation section.

[0015] In the utility model, the broach is replaced by a calibration rod, and the yoke is replaced by a reference block. During positioning, the limiting hole on the reference block is positioned by a side locating needle, which corresponds to the connecting ear hole on the fork ear of the yoke. The second through hole on the reference block is positioned by the calibration rod, which corresponds to the keyway position of the internal spline hole. Then the positions of the positioning block and the side locating needle are fixed, thereby completing the positioning of the reference block. It is convenient for the side locating needle to position the yoke during processing, and the positioning block to position the broach, thereby improving the processing and changing operation efficiency and ensuring the product processing accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A three-dimensional structural schematic diagram of a steering wheel steering gear yoke spline machining alignment tool provided in an embodiment of the utility model;

[0017] Figure 2 A schematic cross-sectional view of a steering wheel steering gear yoke spline machining alignment tool provided in an embodiment of the utility model;

[0018] Figure 3 A schematic diagram of the three-dimensional structure of a calibration rod in a steering wheel steering gear yoke spline machining alignment tool provided in an embodiment of the utility model.

[0019] Reference numerals:

[0020] 1. Lower support plate; 2. Upper support plate; 201. First through hole; 3. Lower slide plate; 4. Calibration rod; 401. Installation section; 402. Processing section; 5. Positioning block; 501. Positioning hole; 502. Positioning sleeve; 503. Connecting plate; 6. Reference block; 601. Limiting hole; 602. Second through hole; 7. Side positioning pin; 8. Guide column. DETAILED DESCRIPTION

[0021] The embodiments of the present invention are described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0022] In the description of the embodiments of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms, "connection" and "installation" should be understood in a broad sense. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. In addition, "connection" can be a direct connection or an indirect connection through an intermediate medium. Among them, "fixed" means that they are connected to each other and the relative position relationship after connection remains unchanged. The directional terms mentioned in the embodiments of the present utility model, such as "inside", "outside", "top", "bottom", etc., are only reference to the directions of the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of the present utility model, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present utility model.

[0023] In the embodiments of the present invention, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0024] In the embodiment of the present invention, "and / or" is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0025] References to "one embodiment" or "some embodiments" etc. described in this specification mean that one or more embodiments of the utility model include specific features, structures or characteristics described in conjunction with the embodiment. Therefore, the statements "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. that appear in different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways.

[0026] Example:

[0027] Reference Figure 1 , Figure 2 and Figure 3 As shown, a steering wheel steering gear yoke spline processing alignment tooling comprises a lower support plate 1 and an upper support plate 2, a guide mechanism is arranged between the lower support plate 1 and the upper support plate 2, a lower slide plate 3 is slidably arranged on the guide mechanism, a positioning block 5 is detachably arranged on the lower slide plate 3, a positioning hole 501 is opened on the positioning block 5, a first through hole 201 is arranged at a position corresponding to the positioning hole 501 on the upper support plate 2, a reference block 6 is arranged at a position corresponding to the first through hole 201 on the upper support plate 2, a second through hole 602 connected with the through hole is arranged on the reference block 6, and limiting holes 601 are symmetrically arranged on both side walls on the opposite side of the reference block 6, a side positioning pin 7 is movably arranged in the limiting hole 601, a verification rod 4 is penetrated in the first through hole 201 and the second through hole 602, and the bottom end of the verification rod 4 is clamped in the positioning hole 501.

[0028] A check rod 4 is used as a broach, and a reference block 6 is used as a yoke. The reference block 6 is placed on the upper support plate 2. The check rod 4 is then passed through the first through hole 201 and the second through hole 602 and clamped in the positioning hole 501. At the same time, the relative position of the check rod 4 and the reference block 6 is made to correspond to the keyway position of the spline hole in the yoke. The positioning block 5 is then locked in the position of the lower slide plate 3 to fix the position of the check rod 4. After the position of the check rod 4 is determined, it is equivalent to determining the position of the broach and the position of the yoke. The position of the side positioning pin 7 is then adjusted so that the side positioning pin 7 can be accurately inserted into the limiting hole 601 on the side of the reference block 6. The position of the power device connected to the side positioning pin 7 is then locked.

[0029] A positioning block 5 is fixed on the lower slide plate 3. The movement of the lower slide plate 3 can drive the positioning block 5 to move, thereby driving the calibration rod 4 to move in the reference block 6. After the calibration rod 4 is replaced with a broach and the reference block 6 is replaced with a yoke, the broach can be driven to process the yoke.

[0030] The positioning block 5 includes a positioning sleeve 502, a connecting plate 503 is provided at the bottom end of the positioning sleeve 502, a threaded hole is provided on the connecting plate 503, a mounting hole is opened at a corresponding position of the lower slide plate 3, and the connecting plate 503 is fixed to the lower slide plate 3 through the threaded hole and the mounting hole with bolts.

[0031] The positioning sleeve 502 is used to clamp and position the calibration rod 4, and can also be used to clamp and position the broach. After the position is determined, it is fixed to the lower slide plate 3 by bolts.

[0032] The guide mechanism includes guide posts 8 , which are evenly arranged between the upper support portion and the lower support plate 1 , and the guide posts 8 penetrate the lower slide plate 3 .

[0033] The guide column 8 ensures the stability of the movement of the lower slide plate 3, thereby ensuring the stability of the movement of the calibration rod 4 in the reference block 6, ensuring the stability of the broach processing on the yoke during processing, and ensuring product quality.

[0034] The side positioning pin 7 is a cylindrical structure, and the edges of the ends adjacent to the reference block 6 are rounded.

[0035] Since the connecting ear hole on the fork ear of the yoke is a circular hole, the side positioning needle 7 is set to a cylindrical structure, which is convenient for positioning on the one hand, and can also ensure the accuracy of positioning on the other hand. In addition, the edge of the end is rounded to avoid damage to the yoke by the side positioning needle 7 when pushing the side positioning needle 7 to position the yoke, thereby further ensuring the quality of the product.

[0036] The central axis of the first through hole 201 , the central axis of the second through hole 602 , and the central axis of the positioning hole 501 are coaxially arranged.

[0037] It is ensured that the calibration rod 4 can pass through the first through hole 201 and the second through hole 602 and then enter the positioning hole 501, so as to ensure the accuracy of the positioning of the broach, thereby ensuring that the broach can accurately process the yoke and improve the qualified rate of the product.

[0038] The side walls at both ends and the middle part of the calibration rod 4 are provided with positioning planes, and the positioning planes are located on the same vertical plane.

[0039] The positioning plane on the calibration rod 4 corresponds to the processing plane of the broach, and the positioning plane corresponds to the position of the keyway. On the one hand, it is convenient for positioning the calibration rod 4. On the other hand, it can ensure that after the calibration rod 4 is replaced with the broach, the processing surface of the broach corresponds to the position of the keyway, thereby ensuring the accuracy of the broach positioning and thus ensuring the processing accuracy of the broach.

[0040] The two ends of the calibration rod 4 are installation sections 401 , and the middle part is a processing section 402 . The diameter of the processing section 402 is greater than the diameter of the installation section 401 .

[0041] The installation section 401 facilitates the positioning of the calibration rod 4, while the processing section 402 corresponds to the processing width of the broach, so that the positioning accuracy of the processing section 402 and the reference block 6 is the processing accuracy of the broach and the yoke.

[0042] When in use, first select the reference block 6 and the calibration rod 4 corresponding to the yoke to be processed and the broach for processing, fix the side locating pin 7 on the output shaft of the cylinder, place the reference block 6 on the upper support plate 2, and then pass the calibration rod 4 through the first through hole 201 and the second through hole 602 and clamp it in the locating hole 501 on the locating block 5, and then adjust the position of the locating block 5 and the reference block 6 so that the position where the processing section 402 of the calibration rod 4 cooperates with the reference block 6 corresponds to the keyway position of the spline hole in the yoke, and then fix the locating block 5 on the lower slide plate 3 by bolts. After the position of the reference block 6 is determined, adjust the position of the side locating pin 7 so that the side locating pin 7 can be accurately inserted into the limiting hole 601 of the reference block 6, and adjust the position of the side locating pin 7 by adjusting the position of the cylinder. After the position of the side locating pin 7 is determined, lock the position of the cylinder so that the cylinder can push the side locating pin 7 to move, thereby clamping and positioning the reference block 6.

[0043] During processing, the calibration rod 4 and the reference block 6 are removed, the calibration rod 4 is replaced with a broach, and the reference block 6 is replaced with the yoke to be processed. Then the cylinder is started to insert the side positioning pin 7 into the connecting ear hole on the fork ear of the yoke, thereby completing the positioning of the yoke. The lower slide plate 3 is connected to a power device, which drives the lower slide plate 3 to move on the guide column 8 through power rotation, thereby driving the broach to move up and down, and processing the keyway position of the inner spline hole of the yoke.

[0044] If you want to change to other yoke models for processing, you only need to select the corresponding reference block 6 and broach, and re-position the side positioning pin 7 and the positioning block 5. This greatly simplifies the positioning difficulty and improves the processing efficiency. In addition, it can also ensure the processing accuracy and the product qualification rate.

[0045] The above are only specific implementations of the utility model, but the protection scope of the utility model is not limited to them. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model; in the absence of conflicts, the embodiments of the utility model and the features in the embodiments can be combined with each other. Therefore, the protection scope of the utility model shall be based on the protection scope of the claims.

Claims

1. A tool for machining and aligning the yoke spline of a steering wheel and steering gear, characterized in that: The invention comprises a lower supporting plate and an upper supporting plate, wherein a guiding mechanism is provided between the lower supporting plate and the upper supporting plate, a lower sliding plate is slidably provided on the guiding mechanism, a positioning block is detachably provided on the sliding plate, a positioning hole is opened on the positioning block, a first through hole is provided at a position corresponding to the positioning hole on the upper supporting plate, a reference block is provided at a position corresponding to the first through hole on the upper supporting plate, a second through hole connected with the through hole is provided on the reference block, and limiting holes are symmetrically provided on two side walls on opposite sides of the reference block, a side positioning pin is movably provided in the limiting hole, a verification rod is penetrated through the first through hole and the second through hole, and the bottom end of the verification rod is clamped in the positioning hole.

2. The steering wheel steering gear yoke spline processing alignment tool according to claim 1, characterized in that: The positioning block includes a positioning sleeve, a connecting plate is provided at the bottom end of the positioning sleeve, a threaded hole is provided on the connecting plate, a mounting hole is opened at a corresponding position of the lower slide plate, and the connecting plate is fixed to the lower slide plate through the threaded hole and the mounting hole with bolts.

3. The steering wheel steering gear yoke spline processing alignment tool according to claim 2, characterized in that: The guide mechanism comprises guide posts, which are evenly arranged between the upper support portion and the lower supporting plate, and the guide posts penetrate the lower sliding plate.

4. The steering wheel steering gear yoke spline processing alignment tool according to claim 3, characterized in that: The side positioning pin is a cylindrical structure, and the edges of the ends adjacent to the reference block are rounded.

5. The steering wheel steering gear yoke spline processing alignment tool according to claim 4, characterized in that: The central axis of the first through hole, the central axis of the second through hole and the central axis of the positioning hole are coaxially arranged.

6. The steering wheel steering gear yoke spline processing alignment tool according to claim 5, characterized in that: The side walls at both ends and the side wall in the middle of the calibration rod are provided with positioning planes, and the positioning planes are located on the same vertical plane.

7. The steering wheel steering gear yoke spline processing alignment tool according to claim 6, characterized in that: The two ends of the calibration rod are installation sections, and the middle part is a processing section, and the diameter of the processing section is larger than the diameter of the installation section.

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