Universal pin wheel housing internal tooth chamfering tool
By designing a universal needle tooth shell internal tooth chamfering tooling, and utilizing multiple positioning and clamping mechanisms, the problem of low positioning accuracy of needle tooth shells was solved, and high-precision machining and model adaptability of internal tooth chamfering were achieved.
Patent Information
- Application Number
- CN202422716177.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-08
- Publication Date
- 2025-11-21
- Estimated Expiration
- 2034-11-08
AI Technical Summary
The positional error between the semi-circular pin hole and the outer circle of the pin tooth housing is large, resulting in low positioning accuracy when using a chuck and locating pin, and inaccurate internal tooth chamfering.
A universal needle tooth shell internal tooth chamfering fixture is adopted. The needle tooth shell is initially positioned by a positioning mechanism set on a fixed frame. The positioning mechanism abuts against the inner side wall of the needle tooth shell, and the guide position is determined by a limiting mechanism. The needle tooth shell is fixed by a clamping mechanism to ensure that the internal tooth chamfering is performed on the machine tool.
It improves the positioning accuracy of the needle tooth housing, reduces the error in the internal tooth chamfering process, avoids damage to the needle tooth housing caused by positioning errors, and supports quick replacement and positioning of different models of needle tooth housing.
Smart Images
Figure CN223572136U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of needle tooth shell processing technology, and in particular to a general-purpose needle tooth shell internal tooth chamfering tool. Background Technology
[0002] In an RV reducer, one component is the pin gear housing. The internal teeth of the pin gear housing are individual semi-cylindrical shapes with the same diameter, machined by profile grinding. Both the upper and lower openings of the housing require chamfering. The traditional chamfering method involves using a chuck for centering and a pin for angular positioning, then machining the chamfers of all the openings on one side. After flipping the chuck over, the same clamping method is used to machine the chamfers of all the openings on the other side.
[0003] However, since the chuck is centered on the center of a certain outer circle, it may not be concentric with the inner teeth. The pin is angular, so it can only be a clearance fit, and the clearance is relatively large. This is because the positional error between the semi-circular pin hole of the pin tooth housing and the outer circle is relatively large, resulting in low positioning accuracy.
[0004] Regarding the aforementioned technologies, the inventors believe that the positional error between the semi-circular pin hole and the outer circle of the pin tooth shell is large, and the positioning accuracy using a chuck and positioning pin is not high, resulting in inaccurate chamfering of the inner teeth of the pin tooth shell. Utility Model Content
[0005] The purpose of this application is to provide a universal tooling for chamfering the inner teeth of a pin tooth housing, so as to improve the problem that the positional error between the semi-circular pin hole and the outer circle of the pin tooth housing is large, the positioning accuracy of the chuck and locating pin is not high, and the chamfering of the inner teeth of the pin tooth housing is inaccurate.
[0006] This application provides a general-purpose needle tooth housing internal tooth chamfering tooling, which adopts the following technical solution:
[0007] A universal tooling for chamfering the inner teeth of a pin tooth housing includes a fixed base, an upwardly extending fixed frame on the fixed base, a positioning mechanism one for placing the pin tooth housing on the fixed frame, the positioning mechanism one contacting the outer surface of the pin tooth housing, a mounting base on the fixed base, a positioning mechanism two on the mounting base, the positioning mechanism two abutting against the inner sidewall of the pin tooth housing, a clamping mechanism on the fixed frame contacting the top of the pin tooth housing, and a limiting mechanism on the mounting base restricting the position of the positioning mechanism two.
[0008] By adopting the above technical solution, a positioning mechanism set on the fixed frame initially positions the pin tooth shell to determine its installation position. The positioning mechanism abuts against the inner wall of the pin tooth shell, and a limiting mechanism determines its guiding position, allowing for rough angular positioning and easy placement of parts. After the limiting mechanism retracts, the positioning mechanism continues to open, further positioning the pin tooth shell through the pin hole wall. Subsequently, the pin tooth shell is clamped and fixed by a clamping mechanism set on the fixed frame to prevent it from detaching from the positioning mechanism during internal tooth chamfering. Then, the positioning mechanism retracts, providing machining space for the cutting tool. Finally, the internal teeth of the pin tooth shell are chamfered using an internal tooth chamfering tool on the machine tool.
[0009] Optionally, the positioning mechanism includes a support block, a groove is provided above the fixing frame, an installation block is provided in the groove, the support block is detachably mounted on the installation block, and a positioning groove is provided on the support block to contact the side wall of the needle tooth shell.
[0010] By adopting the above technical solution, the support block and the mounting block set on the groove of the fixing frame are detachably connected. The positioning groove set on the support block contacts the outer wall of the needle tooth shell, which supports the needle tooth shell and performs preliminary rough positioning, determines the placement position of the needle tooth shell on the fixing seat, and avoids large errors in the processing of the inner tooth chamfer of the needle tooth shell due to incorrect placement, which would damage the needle tooth shell. At the same time, when processing other models of needle tooth shells, the support block can be replaced to position the new needle tooth shell.
[0011] Optionally, the second positioning mechanism includes a first driving component, which is disposed on the mounting base. Each of the two driving rods of the first driving component has a mounting plate. The first driving component drives the mounting plate to move along the direction of the mounting base. The two mounting plates are provided with mounting grooves, and a positioning block that contacts the inner wall of the pin tooth shell is detachably disposed in the mounting groove.
[0012] By adopting the above technical solution, the driving rods at both ends of the driving component drive the mounting plate to move, thereby causing the positioning block on the mounting plate to contact the inner wall of the pin tooth shell, further positioning the pin tooth shell and reducing the positioning error of the pin tooth shell. The positioning block is detachably installed in the mounting groove of the mounting plate. When it is necessary to chamfer the inner teeth of other pin tooth shells, the positioning block can be quickly removed from the mounting groove of the mounting plate for replacement, facilitating the positioning of the new pin tooth shell.
[0013] Optionally, the positioning block is provided with a positioning element, which abuts against the inner wall of the semi-circular pin hole on the pin tooth shell.
[0014] By adopting the above technical solution, a positioning element is set on the positioning block. The positioning element abuts against the inner wall of the semi-circular pin hole on the pin tooth shell to further position the pin tooth shell, determine the position of the pin tooth shell, and prevent the pin tooth shell from not being completely positioned under the support and positioning of the support block, which would cause errors in the machining of the semi-circular pin hole on the inner wall of the pin tooth shell and damage to the inner teeth of the pin tooth shell.
[0015] Optionally, the two ends of the driving component are provided with support rods, and the support rods abut against the side of the mounting plate that is close to the driving component when the driving component drives the mounting plate closer to the driving component.
[0016] By adopting the above technical solution, support rods are set at both ends of the driving component one to support the mounting plate that approaches the driving component one, preventing the mounting plate from colliding with the driving component one. At the same time, the position of the mounting plate is restricted, shortening the time it takes for the mounting plate to move towards the inner wall of the needle tooth shell each time, so that the positioning mechanism two can quickly complete the further positioning of the needle tooth shell.
[0017] Optionally, the limiting mechanism includes a second driving component, and the mounting base is provided with support frames at both ends. The second driving component is located on the side of the support frame away from the mounting plate, and the driving rod of the second driving component passes through the support frame and abuts against the side of the mounting plate.
[0018] By adopting the above technical solution, support frames and drive components three are set at both ends of the mounting base. The drive rod of drive component three abuts against the mounting plate to limit the mounting plate, so that the positioning block and positioning component on the mounting plate maintain a certain gap with the semi-circular pin hole of the pin tooth shell. This ensures that there is enough gap between the pin hole and the positioning component during installation, which plays a guiding role in installation, facilitates clamping, and can roughly determine the angular direction. This prevents the pin hole from being unable to be reached during precise positioning, which would affect the subsequent processing and installation of the pin tooth shell.
[0019] Optionally, the clamping mechanism includes a third driving component, which is disposed above the fixed frame, and the driving rod of the third driving component is provided with a fixed plate that abuts against the top of the pin tooth shell.
[0020] By adopting the above technical solution, after the needle tooth shell is positioned, the driving component three drives the fixing plate to rotate, rotating the fixing plate above the needle tooth shell. Then, the driving component three drives the fixing plate to move down and press the needle tooth shell tightly, preventing the needle tooth shell from moving up and down in the positioning mechanism one and the positioning mechanism two, which would affect the chamfering of the teeth inside the needle tooth shell.
[0021] Optionally, a fixing groove corresponding to the side wall of the needle tooth shell is provided below the fixing plate, and an elastic element is provided between the driving rod of the driving component three and the fixing plate.
[0022] By adopting the above technical solution, the fixing groove opened under the fixing plate prevents the pressure plate from rotating during the internal tooth processing of the needle tooth shell, which would damage the surface of the needle tooth shell. After the internal tooth chamfering of the needle tooth shell is completed, the driving component three drives the fixing plate to release the needle tooth shell, and the elastic component pushes the fixing plate away from the needle tooth shell quickly. Then the driving component three rotates the fixing plate away from the top of the needle tooth shell, avoiding the fixing plate from rotating on the upper surface of the needle tooth shell and causing damage to the surface of the needle tooth shell.
[0023] In summary, this application includes at least one of the following beneficial technical effects:
[0024] 1. The support block is detachably connected to the mounting block in the groove on the fixed frame. The positioning groove on the support block contacts the outer wall of the needle tooth shell to support and initially rough position the needle tooth shell, determining its placement position on the fixed base. This avoids large errors in the machining of the inner tooth chamfer of the needle tooth shell due to incorrect placement, which could damage the needle tooth shell. At the same time, when machining other models of needle tooth shells, the support block can be replaced to position the new needle tooth shell.
[0025] 2. The driving rods at both ends of the driving component drive the mounting plate to move, thereby bringing the positioning block on the mounting plate into contact with the inner wall of the pin tooth shell, further positioning the pin tooth shell and reducing its positioning error. The positioning block is detachably mounted in the mounting slot of the mounting plate. When chamfering is required on the inner teeth of other pin tooth shells, the positioning block can be quickly removed from the mounting slot of the mounting plate for replacement, facilitating precise positioning of the new pin tooth shell.
[0026] 3. Support frames and drive components three are set at both ends of the mounting base. The drive rod of drive component three abuts against the mounting plate to limit the mounting plate, so that the positioning block and positioning component on the mounting plate maintain a certain gap with the semi-circular pin hole of the pin tooth shell. This facilitates the rough angular orientation of the pin tooth shell and prevents the positioning component from not being able to reach the pin hole when the angular orientation is incorrect during installation, which would cause the pin tooth shell to be incorrectly oriented and affect the subsequent processing and installation of the pin tooth shell. Attached Figure Description
[0027] Figure 1 This is a schematic diagram of a general-purpose needle tooth housing internal tooth chamfering tool.
[0028] Figure 2 This is a partial sectional view of a general-purpose needle tooth housing internal tooth chamfering tool.
[0029] Figure 3 yes Figure 2 A magnified view of part A in the image.
[0030] In the diagram, 1. Fixed base; 11. Fixed frame; 111. Groove; 112. Mounting block; 12. Mounting base; 121. Support frame; 2. Pin tooth shell; 21. Semi-circular pin hole; 3. Positioning mechanism one; 31. Support block; 311. Positioning groove; 4. Clamping mechanism; 41. Driving component three; 42. Fixed plate; 43. Fixed groove; 44. Elastic component; 5. Positioning mechanism two; 51. Driving component one; 52. Mounting plate; 521. Mounting groove; 53. Positioning block; 54. Positioning component; 55. Support rod; 6. Limiting mechanism; 61. Driving component two. Detailed Implementation
[0031] The following is in conjunction with the appendix Figure 1 - Appendix Figure 3 This application will be described in further detail below.
[0032] A general-purpose needle tooth housing internal tooth chamfering tool, refer to Figure 1 and Figure 2 The system includes a fixed base 1, which is fixed to the machine tool. Three mounting brackets 11 are installed on the fixed base 1 by bolts. Grooves 111 are formed on the mounting brackets 111, and mounting blocks 112 are fixed in the grooves 111 by bolts. A connecting column is welded to the bottom of the support block 31. The mounting block 112 has holes and slots corresponding to the connecting columns at the bottom of the support block 31. The metal support block 31 is inserted into the mounting block 112. When the support block 31 needs to be replaced, it can be directly pulled out from the mounting block 112 for replacement. The support block 31 has a positioning groove 311 that contacts the outer wall of the needle tooth shell 2. The positioning groove 311 on the support block 31 is used to perform a preliminary coarse positioning of the needle tooth shell 2. The fixed base 1 has multiple sets of threaded holes, which can change the position of the mounting brackets 11 to complete the coarse positioning of needle tooth shells of different sizes.
[0033] Reference Figure 1 and Figure 2Mounting base 12 is fixed to mounting base 1 with bolts. Driving component 51, a two-jaw centering cylinder, is then fixed to mounting base 12 with bolts. It is connected to the power supply and control system. Mounting plate 52 is fixed to the drive rods at both ends of the two-jaw centering cylinder with bolts. A mounting groove 521 for fixing positioning block 53 is formed above mounting plate 52. The metal positioning block 53 contacts the inner wall of the pin tooth shell 2 placed on support block 31. A positioning component 54 is welded to positioning block 53, abutting against the semi-circular pin hole 21 on the inner wall of pin tooth shell 2. Positioning component 54 is a cylindrical metal surface integrally formed with the metal positioning block 53 on the positioning block 53, with a partially conical top surface. The mounting plate 52 is driven to move to both ends by a two-jaw centering cylinder, which in turn moves the positioning block 53 and the cylindrical metal surface to the semi-circular pin hole 21 inside the pin tooth shell 2, thereby fixing the angle of the pin tooth shell 2. The metal positioning block 53 is inserted into the connecting hole groove on the side wall of the mounting groove 521 through the connecting post welded to the bottom, so as to realize the quick disassembly of the positioning block 53. When positioning other types of pin tooth shells 2, the positioning block 53 can be replaced as needed to fix the angle and perform fine positioning of the new pin tooth shell 2.
[0034] Reference Figures 1 to 3 Support brackets 121 are welded to both ends of the mounting base 12. The second drive component 61 is fixed with bolts on the side of the two support brackets 121 away from the drive component 51. The second drive component 61 is a limit cylinder connected to the power supply and control system. The driving force of the limit cylinder is greater than the driving force of the two-claw centering cylinder. The drive rod of the limit cylinder abuts against the side of the mounting plate 52 away from the drive component 51. After the mounting plate 52 is pushed to the designated position by the drive component 51, a reverse force is applied to the mounting plate 52, so that the positioning block 53 and the fixed positioning component 54 maintain a gap of 1-2mm with the semi-circular pin hole 21 on the pin tooth shell 2, thus completing the rough angular positioning and guidance of the pin tooth shell 2, making it easy to install parts. After the part is placed in, the limit cylinder retracts, causing the two-jaw centering cylinder, which is the drive component 51, to drive the mounting plate 52, so that the positioning block 53 and the positioning component 54 can complete the precise positioning of the needle tooth shell 2. The support rod 55 is fixed at both ends of the drive component 51 with bolts. After the needle tooth shell 2 is pressed, the drive component 51 drives the mounting plate 52 away from the needle tooth shell 2, leaving space for the tool.
[0035] Reference Figures 1 to 3A drive component 41, a rotary downward pressing cylinder, is bolted to three fixed brackets 11 and connected to the power supply and control system. A fixed plate 42, a downward pressing plate, is fixed to the drive rod of the rotary downward pressing cylinder. A fixing groove 43, corresponding to the side wall of the needle tooth shell 2, is opened below the downward pressing plate. An elastic element 44, a spring, is connected and fixed to the drive rod below the downward pressing plate. After the needle tooth shell 2 is precisely positioned, the rotary downward pressing cylinder drives... The lever drives the lower pressure plate to rotate above the needle tooth shell 2. Then, the lower pressure cylinder drives the lower pressure plate to abut against the upper surface of the needle tooth shell 2. The side wall of the needle tooth shell 2 contacts the fixing groove 43. The spring contracts. After the needle tooth shell 2 is processed, the corner lower pressure cylinder drives the lower pressure plate to release the needle tooth shell 2. The spring returns to its original position and lifts the lower pressure plate away from the needle tooth shell 2. Then, the corner lower pressure cylinder drives the lower pressure plate to rotate away from the needle tooth shell 2, so as to avoid the lower pressure plate from causing wear on the surface of the needle tooth shell 2 when rotating.
[0036] The implementation principle of this application embodiment is as follows:
[0037] The pin tooth shell 2, which requires internal tooth chamfering, is placed in the positioning groove 311 on the support block 31. The three support blocks 31 support and coarsely position the pin tooth shell 2. Then, the first drive component 51 drives the mounting plate 52 to move closer to the pin tooth shell 2. The second drive component 61 is activated. Then, the positioning component 54 on the positioning block 53 fixed on the mounting plate 52 abuts against the semi-circular pin hole 21 on the inner side wall of the pin tooth shell 2. The drive rod of the second drive component 61 abuts against the mounting plate 52, limiting the mounting plate 52 and maintaining a certain gap between the positioning component 21 and the semi-circular pin hole 21 of the pin tooth shell 2, thereby completing the angular positioning of the pin tooth shell 2. Then, the second drive component retracts the drive rod, and the first drive component 51 drives the mounting plate 52 to continue moving towards the pin tooth shell 2, so that the positioning component 54 abuts against the semi-circular pin hole 21 on the pin tooth shell 2, completing the fine positioning of the pin tooth shell 2. After the pin tooth shell 2 is precisely positioned, drive component three 41 drives the fixing plate 42 to rotate and press down, pressing and fixing the upper surface of the pin tooth shell 2. Then, drive component one 51 drives the mounting plate 52 away from the pin tooth shell 2, so that the positioning block 53 and the positioning component 54 are away from the pin tooth shell 2, maintaining a certain distance. Then, the chamfers of the upper and lower openings of the semi-circular pin hole 21 are machined in one go by the positive and negative chamfering cutters installed on the machine tool. After machining, drive component three 41 drives the fixing plate 42 to release the pin tooth shell 2, and the elastic component 44 resets, lifting the fixing plate 42 away from the upper surface of the pin tooth shell 2. Then, drive component three 41 drives the fixing plate 42 to rotate away from the top of the pin tooth shell 2. Then, drive component two 61 opens, extends the drive rod, and drive component one 51 drives the rod assembly 52 to move towards the pin tooth shell 2, entering the coarse orientation position. Remove the machined pin tooth shell 2 and put in the pin tooth shell 2 to be machined. Different support blocks 31, positioning blocks 53 and positioning parts 54 can be prepared for needle tooth shells 2 of different sizes. The position of the limiting mechanism 6 can be adjusted to realize the processing of different chamfers of needle tooth shells 2 with one set of fixtures. This allows the needle tooth shell 2 to be fully positioned with pin holes, directly positioning the center of the pin hole pitch circle and the angular direction of the pin hole, improving the positioning accuracy of the needle tooth shell 2, and making the internal tooth chamfering of the needle tooth shell 2 more accurate.
[0038] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.
Claims
1. A universal needle tooth housing internal tooth chamfering tool, comprising a fixed base (1), characterized in that: The fixed base (1) is provided with an upwardly extending fixed frame (11), and the fixed frame (11) is provided with a positioning mechanism (3) for placing the needle tooth shell (2). The positioning mechanism (3) is in contact with the outer surface of the needle tooth shell (2). The fixed base (1) is provided with a mounting base (12), and the mounting base (12) is provided with a positioning mechanism (5). The positioning mechanism (5) abuts against the inner sidewall of the needle tooth shell (2). The fixed frame (11) is provided with a clamping mechanism (4) that contacts the top of the needle tooth shell (2). The mounting base (12) is provided with a limiting mechanism (6) that restricts the position of the positioning mechanism (5).
2. The universal needle tooth housing internal tooth chamfering tooling according to claim 1, characterized in that: The positioning mechanism (3) includes a support block (31), a groove (111) is provided above the fixing frame (11), an mounting block (112) is provided in the groove (111), the support block (31) is detachably mounted on the mounting block (112), and a positioning groove (311) is provided on the support block (31) that contacts the side wall of the needle tooth shell (2).
3. The universal needle tooth housing internal tooth chamfering tooling according to claim 1, characterized in that: The second positioning mechanism (5) includes a first driving component (51), which is mounted on the mounting base (12). Mounting plates (52) are provided on the driving rods at both ends of the first driving component (51). The first driving component (51) drives the mounting plates (52) to move along the mounting base (12). Mounting grooves (521) are provided on the two mounting plates (52). A positioning block (53) that contacts the inner wall of the needle tooth shell (2) is detachably provided in the mounting groove (521).
4. A universal needle tooth housing internal tooth chamfering tooling according to claim 3, characterized in that: The positioning block (53) is provided with a positioning element (54), which abuts against the inner wall of the semi-circular pin hole (21) on the pin tooth shell (2).
5. A universal needle tooth housing internal tooth chamfering tooling according to claim 3, characterized in that: The drive component 1 (51) is provided with support rods (55) at both ends. When the drive component 1 (51) drives the mounting plate (52) to approach the drive component 1 (51), the support rods (55) abut against the side of the mounting plate (52) that is close to the drive component 1 (51).
6. A universal needle tooth housing internal tooth chamfering tool according to claim 1, characterized in that: The limiting mechanism (6) includes a second driving component (61). Support frames (121) are provided at both ends of the mounting base (12). The second driving component (61) is located on the side of the support frame (121) away from the mounting plate (52). The driving rod of the second driving component (61) passes through the support frame (121) and abuts against the side of the mounting plate (52).
7. A universal needle tooth housing internal tooth chamfering tooling according to claim 1, characterized in that: The clamping mechanism (4) includes a driving component three (41), which is disposed above the fixed frame (11). The driving rod of the driving component three (41) is provided with a fixed plate (42) that abuts against the top of the needle tooth shell (2).
8. A universal needle tooth housing internal tooth chamfering tooling according to claim 7, characterized in that: The fixing plate (42) is fitted with a fixing groove (43) corresponding to the side wall of the needle tooth shell (2) below, and an elastic element (44) is provided between the driving rod of the driving component three (41) and the fixing plate (42).