Eccentric shaft clamp tool

Abstract

The eccentric shaft clamp tool comprises a shell and a clamping column, a guide groove is formed in the shell, a penetrating groove is formed in the groove bottom of the guide groove, the clamping column comprises a guide part and a penetrating part, and the guide part and the penetrating part are fixedly connected. At least one of the outer diameter of the guide part and the diameter of the guide groove is gradually increased from the side close to the groove bottom of the penetrating groove to the side away from the groove bottom of the penetrating groove, the peripheral side wall of the guide part abuts against the groove wall of the guide groove, and a fixing groove is formed in the side, away from the groove bottom of the penetrating groove, of the clamping column. A plurality of adjusting holes are formed in the groove wall of the fixing groove and distributed in the circumferential direction of the penetrating part, and the sides, away from the groove bottom of the fixing groove, of the adjusting holes penetrate through the clamping column. The eccentric shaft machining device has the advantages that the eccentric shaft is fixed by clamping the first shaft column which does not need to be machined, interference of a clamp tool to work of a milling cutter is reduced, and the working efficiency of eccentric shaft machining is improved.

Description

Technical Field

[0001] This application relates to the field of metal clamping equipment technology, and in particular to an eccentric shaft clamping fixture. Background Technology

[0002] Eccentric shafts are important components in the field of machining. During operation, they produce a specific eccentric effect, thus meeting the complex and precise motion requirements of mechanical equipment and are widely used in the construction of various types of machinery.

[0003] Reference Figure 1 An eccentric shaft 1 includes a first post 11, a cam 12, and a second post 13. The cam 12 and the first post 11 are fixedly connected. The second post 13 is fixedly connected to the side of the cam 12 away from the first post 11. The axis of the second post 13 does not coincide with the axis of the first post 11. The cam 12 has a fan-shaped structure, and the radius of the side of the cam 12 near the second post 13 is smaller than the radius of the side of the cam 12 away from the second post 13. In related technologies, the machining process of an eccentric shaft is typically as follows: the end of the first post 11 away from the cam 12 and the end of the second post 13 away from the cam 12 are respectively abutted against two clamping plates of a fixture to fix the eccentric shaft 1. Then, the cam 12 and the second post 13 of the eccentric shaft are machined by a milling cutter to obtain an eccentric shaft 1 with the required dimensions and specifications.

[0004] Regarding the aforementioned technologies, the inventors believe that during the processing, when the milling cutter processes the second shaft, interference occurs between the milling cutter and the clamping plate due to the second shaft abutting against the clamping plate, resulting in reduced processing efficiency, and there is still room for improvement. Utility Model Content

[0005] To improve the problem of reduced machining efficiency caused by interference between the milling cutter and the clamping plate when the milling cutter is machining the second shaft column during the machining process, this application provides an eccentric shaft fixture.

[0006] The eccentric shaft fixture provided in this application adopts the following technical solution:

[0007] An eccentric shaft clamping fixture includes a housing and a clamping column. The housing has a guide groove, and the bottom of the guide groove has a through groove. The clamping column includes a guide portion and a through portion, the through portion passing through the through groove. The guide portion and the through portion are fixedly connected. At least one of the outer diameter of the guide portion and the diameter of the guide groove gradually increases from the side near the bottom of the through groove to the side away from the bottom of the through groove. The outer circumferential sidewall of the guide portion abuts against the groove wall of the guide groove. The clamping column has a fixing groove for mounting a first shaft column on the side away from the bottom of the through groove. The groove wall of the fixing groove has a plurality of adjustment holes, which are distributed circumferentially along the through portion. The side of the adjustment holes away from the bottom of the fixing groove passes through the clamping column.

[0008] By adopting the above technical solution, the guide groove, the through groove, and the clamping column cooperate with each other. Due to the setting of the adjustment hole, the clamping column moves towards the bottom of the through groove and the guide groove. The guide part is squeezed by the groove wall of the guide groove, the distance between the side walls on both sides of the adjustment hole is reduced, and the diameter of the fixing groove is reduced, thereby fixing the first shaft column on the fixture, improving the stability of the fixture in fixing the eccentric shaft. At the same time, by clamping the first shaft column, which does not need to be processed, the eccentric shaft is fixed, reducing the interference of the fixture on the milling cutter, improving the smoothness of the milling cutter's operation, and improving the processing efficiency of the eccentric shaft.

[0009] Optionally, the bottom of the fixing groove is provided with a connecting hole, the clamping column is provided with an abutment block, the abutment block is embedded in the fixing groove, the clamping column is also provided with a connecting rod, the connecting rod passes through the connecting hole and is fixedly connected to the abutment block, the bottom of the through groove is provided with a through hole, the connecting rod passes through the through hole and extends to the outside of the through hole, and when the abutment block moves towards the side closer to the bottom of the fixing groove with the connecting rod, the abutment block abuts against the bottom of the fixing groove.

[0010] By adopting the above technical solution, the setting of the abutment block allows the abutment block to abut against the bottom of the fixed groove after the connecting rod is pulled to a certain extent. As a result, when the connecting rod is pulled further, the clamping column moves towards the bottom of the through groove along with the movement of the connecting rod, which improves the convenience of adjusting the clamping column to move towards the bottom of the through groove.

[0011] Optionally, it also includes a base and a hydraulic cylinder. The housing is fixedly connected to the base. The housing has a cavity on the side near the base. The cavity communicates with the through hole. The hydraulic cylinder is disposed in the cavity and fixedly connected to the base. The piston rod of the hydraulic cylinder and the end of the connecting rod extending outside the through hole are fixedly connected.

[0012] By adopting the above technical solution, the piston rod of the hydraulic cylinder is fixedly connected to the connecting rod. When the hydraulic cylinder is started, the extension and retraction of the piston rod can automatically control the movement of the connecting rod, thereby causing the clamping column to move in the groove towards or away from the bottom of the groove. This achieves automatic clamping and loosening of the first column of the eccentric shaft, eliminating the need for manual pulling of the connecting rod for adjustment and fixation, thus improving the convenience of operation and work efficiency.

[0013] Optionally, a cover plate is fixedly connected to the side of the housing away from the base. The cover plate is provided with a clearance hole to avoid the first shaft column. The cover plate blocks the adjustment hole through one side of the clamping column.

[0014] By adopting the above technical solution, the cover plate blocks one side of the adjustment hole through the clamping column, preventing impurities such as iron filings from entering the adjustment hole during the processing. This avoids the accumulation of impurities affecting the adjustment of the distance between the side walls on both sides of the adjustment hole, thereby improving the clamping effect of the clamping column on the first shaft column.

[0015] Optionally, a dustproof ring is fixedly connected to the side of the cover plate away from the housing, which is used to abut against the side of the cam near the first shaft post and has an outer diameter smaller than the radius of the side of the cam near the second shaft post.

[0016] By adopting the above technical solution, during the machining of the eccentric shaft, the dustproof ring further blocks impurities such as iron filings and dust generated during machining, preventing them from entering the connection between the clamping column and the first shaft column, as well as critical positions such as the through slot. This further ensures the normal operation of the fixture and reduces problems such as component wear and jamming that may be caused by impurities entering, thereby improving the service life and stability of the fixture and tooling. On the other hand, the dustproof ring increases the distance between the cam and the cover plate, which prevents interference between the milling cutter and the cover plate during the machining of the cam and the second shaft column, improving the convenience of eccentric shaft machining.

[0017] Optionally, the housing is provided with a plurality of dust removal holes, which are distributed around the circumference of the housing and penetrate through the side of the housing near the base. The dust removal holes are connected to the cavity.

[0018] By adopting the above technical solution, during the processing, impurities such as iron filings and dust will enter the cavity inside the housing through various gaps. The dust removal hole provides a discharge channel for these impurities, which can effectively prevent impurities from accumulating in the cavity, prevent impurities from affecting the normal operation of the hydraulic cylinder, and improve the stability of the fixture and tooling.

[0019] Optionally, the diameter of the through hole is smaller than the diameter of the bottom of the through groove.

[0020] By adopting the above technical solution, since the diameter of the through hole is smaller than the diameter of the bottom of the through groove, when the clamping column moves to the side closer to the bottom of the through groove, the clamping column abuts against the bottom of the through groove, which prevents the clamping column from coming out of the through hole and improves the stability of the clamping column when it is inserted into the through groove.

[0021] Optionally, the wall of the fixing groove is provided with the same number of through holes as the number of adjusting holes. The through holes are respectively provided on the side of the adjusting hole near the bottom of the fixing groove, and the through holes are respectively connected to the adjusting hole.

[0022] By adopting the above technical solution, the processing of the adjustment hole is made easier by cutting the through hole on the wall of the fixed groove towards the side away from the bottom of the fixed groove.

[0023] Optionally, an annular groove is provided on the outer peripheral sidewall of the through-hole portion.

[0024] By adopting the above technical solution, the setting of the annular groove reduces the thickness of the through part, making the through part easier to deform and the diameter of the fixing groove easier to change, further improving the clamping effect of the clamping column on the first shaft column.

[0025] In summary, this application includes at least one of the following beneficial technical effects:

[0026] 1. By clamping the first shaft column, which does not require machining, the eccentric shaft is fixed, reducing the interference of the fixture on the milling cutter and improving the working efficiency of eccentric shaft machining.

[0027] 2. The guide groove, through groove and clamping column cooperate with each other so that when the clamping column moves to the side near the bottom of the through groove, the diameter of the fixing groove decreases, which improves the stability of the fixture for fixing the eccentric shaft.

[0028] 3. After the abutting block abuts against the bottom of the fixed groove, the clamping column moves closer to the bottom of the through groove as the connecting rod moves, which improves the convenience of adjusting the movement of the clamping column; Attached Figure Description

[0029] Figure 1 This is a schematic diagram of an eccentric shaft in related technologies.

[0030] Figure 2 This is an exploded view of an eccentric shaft fixture according to an embodiment of this application.

[0031] Figure 3 This is a half-sectional view of an eccentric shaft fixture according to an embodiment of this application.

[0032] Figure 4 yes Figure 3Enlarged schematic diagram of part A in the middle.

[0033] Figure 5 This is a schematic diagram of the clamping column in the embodiment of this application.

[0034] Figure 6 This is an exploded partial view of an eccentric shaft fixture according to an embodiment of this application.

[0035] Figure 7 This is a schematic diagram of the cover plate in an embodiment of this application.

[0036] Explanation of reference numerals in the attached drawings: 1. Eccentric shaft; 11. First shaft column; 12. Cam; 13. Second shaft column; 2. Base; 3. Housing; 31. Guide groove; 32. Through groove; 321. Through hole; 33. Cavity; 34. Cover plate; 341. Clearance hole; 342. Clearance groove; 343. Dustproof ring; 35. Dust removal hole; 4. Clamping column; 41. Guide part; 42. Through part; 421. Ring groove; 43. Fixing groove; 431. Through hole; 432. Adjustment hole; 433. Connecting hole; 5. Drive assembly; 51. Hydraulic cylinder; 52. Abutment block; 53. Connecting rod. Detailed Implementation

[0037] The following is in conjunction with the appendix Figure 1-7 This application will be described in further detail.

[0038] Reference Figure 1 An eccentric shaft 1 includes a first shaft post 11, a cam 12, and a second shaft post 13. The cam 12 and the first shaft post 11 are fixedly connected. The second shaft post 13 is fixedly connected to the side of the cam 12 away from the first shaft post 11. The axis of the second shaft post 13 does not coincide with the axis of the first shaft post 11. The cam 12 has a fan-shaped structure. The radius of the side of the cam 12 near the second shaft post 13 is smaller than the radius of the side of the cam 12 away from the second shaft post 13.

[0039] This application discloses an eccentric shaft fixture.

[0040] Reference Figure 2 The eccentric shaft fixture includes a base 2, a housing 3, a clamping column 4, and a drive assembly 5. The housing 3 is fixedly connected to the base 2 for mounting the clamping column 4. The clamping column 4 is mounted on the housing 3 to clamp and fix the eccentric shaft 1. The drive assembly 5 is fixedly connected to the base 2 to drive the clamping column 4 to clamp the eccentric shaft 1.

[0041] Reference Figure 3 and Figure 4The housing 3 has a guide groove 31 on the side away from the base 2, and the bottom of the guide groove 31 has a through groove 32. The two cooperate with each other to allow the clamping column 4 to be installed. The clamping column 4 includes a guide portion 41 and a through portion 42, which are fixedly connected. The through portion 42 passes through the through groove 32. At least one of the outer diameter of the guide portion 41 and the diameter of the guide groove 31 gradually increases from the side near the bottom of the through groove 32 to the side away from the bottom of the through groove 32. In this embodiment, it is taken as an example that both the outer diameter of the guide portion 41 and the diameter of the guide groove 31 gradually increase from the side near the bottom of the through groove 32 to the side away from the bottom of the through groove 32. The outer peripheral sidewall of the guide portion 41 abuts against the groove wall of the guide groove 31.

[0042] Reference Figure 4 and Figure 5 The clamping column 4 has a fixing groove 43 on the side away from the bottom of the through groove 32 for mounting the first shaft column 11. The wall of the fixing groove 43 has several through holes 431. In this embodiment, four through holes 431 are used as an example, and the four through holes 431 are evenly distributed along the circumference of the clamping column 4. The wall of the fixing groove 43 also has the same number of adjusting holes 432 as the number of through holes 431. The four adjusting holes 432 are located one-to-one on the side of the through holes 431 away from the bottom of the fixing groove 43 and are connected to the through holes 431. The adjusting holes 432 penetrate the side of the clamping column 4 away from the bottom of the fixing groove 43, so that when the clamping column 4 moves closer to the bottom of the through groove 32, the guide part 41 is squeezed by the wall of the guide groove 31, and the clamping column 4 deforms to clamp the first shaft column 11. In order to facilitate the deformation of the clamping column 4, the outer peripheral sidewall of the through part 42 has an annular groove 421 to reduce the thickness of the through part 42.

[0043] Reference Figure 3 and Figure 4The drive assembly 5 includes a hydraulic cylinder 51, an abutment block 52, and a connecting rod 53. The housing 3 has a cavity 33 on the side near the base 2 for mounting the hydraulic cylinder 51. The hydraulic cylinder 51 is embedded in the cavity 33 and fixedly connected to the base 2, with its piston rod facing the clamping column 4. The abutment block 52 is embedded in the fixing groove 43. When the abutment block 52 moves towards the bottom of the fixing groove 43, it abuts against the bottom of the fixing groove 43. The bottom of the fixing groove 43 has a connecting hole 433. The bottom of the through groove 32 has a through hole 321 coaxial with the connecting hole 433. The diameter of the through hole 321 is smaller than the diameter of the through groove 32 to prevent the clamping column 4 from disengaging from the through hole 321 into the through groove 32. The through hole 321 and the cavity 33 are interconnected. One end of the connecting rod 53 passes through the through hole 321 and the connecting hole 433 in sequence and is fixedly connected to the abutment block 52. The other end of the connecting rod 53 is fixedly connected to the piston rod of the hydraulic cylinder 51. When the connecting rod 53 is driven by the hydraulic cylinder 51 to move towards the side closer to the base 2, the abutment block 52 moves towards the side closer to the bottom of the fixing groove 43 along with the connecting rod 53. After the abutment block 52 abuts against the bottom of the fixing groove 43, it drives the clamping column 4 to move towards the bottom of the through hole 32.

[0044] Reference Figure 6 and Figure 7 To prevent iron filings, dust, and other impurities from entering the adjustment hole 432 during the machining of the eccentric shaft 1, a cover plate 34 is fixedly connected to the housing 3 to block one side of the adjustment hole 432 that passes through the clamping post 4. The cover plate 34 has a clearance hole 341 to avoid interference between the cover plate 34 and the eccentric shaft 1. The side of the cover plate 34 closest to the clamping post 4 has a clearance groove 342 to avoid interference between the cover plate 34 and the guide groove 31. The diameter of the clearance groove 342 is larger than the diameter of the guide groove 31 to avoid interference between the cover plate 34 and the guide part 41. To further prevent iron filings, dust, and other impurities from entering the adjustment hole 432, a dustproof ring 343 coaxial with the clearance hole 341 is fixedly connected to the side of the cover plate 34 away from the housing 3. The dustproof ring 343 abuts against the cam 12, and the outer diameter of the dustproof ring 343 is smaller than the radius of the side of the cam 12 closest to the second shaft post 13, so that impurities are scattered on the outer side of the dustproof ring 343. At the same time, the dustproof ring 343 increases the distance between the cam 12 and the cover plate 34, avoiding interference between the milling cutter and the cover plate 34 during machining.

[0045] Reference Figure 3 The housing 3 also has several dust removal holes 35. In this embodiment, three dust removal holes 35 are used as an example. The three dust removal holes 35 are distributed circumferentially along the housing 3, and the dust removal holes 35 are interconnected with the cavity 33 so that impurities such as iron filings and dust in the cavity 33 can be blown out through the dust removal holes 35. The side of the dust removal hole 35 near the base 2 penetrates the housing 3 to reduce the influence of the housing 3 on the removal of impurities such as iron filings and dust from the cavity 33.

[0046] The implementation principle of an eccentric shaft clamping fixture according to an embodiment of this application is as follows: the first shaft 11 is passed through the dustproof ring 343 and the clearance hole 341 in sequence and then inserted into the fixed groove 43. The hydraulic cylinder 51 is activated to drive the connecting rod 53 to move towards the side closer to the base 2. The connecting rod 53 drives the abutment block 52 to move to the bottom of the fixed groove 43. The abutment block 52 drives the clamping column 4 to move towards the side closer to the bottom of the groove 32. The guide part 41 is squeezed by the groove wall of the guide groove 31, the diameter of the fixed groove 43 is reduced, and the clamping column 4 clamps and fixes the eccentric shaft 1. When it is necessary to clean the cavity 33, the iron filings, dust and other impurities in the cavity 33 are blown out of the shell 3 through the dust removal hole 35.

[0047] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An eccentric shaft fixture, characterized in that: The device includes a housing (3) and a clamping post (4). The housing (3) has a guide groove (31), and the bottom of the guide groove (31) has a through groove (32). The clamping post (4) includes a guide part (41) and a through part (42). The through part (42) passes through the through groove (32). The guide part (41) and the through part (42) are fixedly connected. At least one of the outer diameter of the guide part (41) and the diameter of the guide groove (31) extends from the side near the bottom of the through groove (32) to the side away from the through groove (32). The bottom of the groove of 32) gradually increases on one side. The outer peripheral sidewall of the guide part (41) abuts against the groove wall of the guide groove (31). The clamping column (4) is provided with a fixing groove (43) for the first shaft column (11) to be installed on the side away from the bottom of the through groove (32). The fixing groove (43) is provided with a plurality of adjustment holes (432) on the groove wall. The plurality of adjustment holes (432) are distributed along the circumference of the through part (42). The side of the adjustment hole (432) away from the bottom of the fixing groove (43) penetrates the clamping column (4).

2. The eccentric shaft fixture according to claim 1, characterized in that: The bottom of the fixed groove (43) is provided with a connecting hole (433). The clamping column (4) is provided with an abutment block (52). The abutment block (52) is embedded in the fixed groove (43). The clamping column (4) is also provided with a connecting rod (53). The connecting rod (53) passes through the connecting hole (433) and is fixedly connected to the abutment block (52). The bottom of the through groove (32) is provided with a through hole (321). The connecting rod (53) passes through the through hole (321) and extends to the outside of the through hole (321). When the abutment block (52) moves towards the bottom of the fixed groove (43) with the connecting rod (53), the abutment block (52) abuts against the bottom of the fixed groove (43).

3. The eccentric shaft fixture according to claim 2, characterized in that: It also includes a base (2) and a cylinder (51). The housing (3) is fixedly connected to the base (2). The housing (3) has a cavity (33) on the side near the base (2). The cavity (33) is connected to the through hole (321). The cylinder (51) is located in the cavity (33). The cylinder (51) is fixedly connected to the base (2). The piston rod of the cylinder (51) and the connecting rod (53) are fixedly connected at one end extending outside the through hole (321).

4. The eccentric shaft fixture according to claim 3, characterized in that: A cover plate (34) is fixedly connected to the side of the housing (3) away from the base (2). The cover plate (34) is provided with a clearance hole (341) for avoiding the first shaft column (11). The cover plate (34) blocks the adjustment hole (432) through the clamping column (4) on one side.

5. The eccentric shaft fixture according to claim 4, characterized in that: The cover plate (34) is fixedly connected to a dustproof ring (343) on the side away from the housing (3) for abutting against the side of the cam (12) near the first shaft post (11) and having an outer diameter smaller than the radius of the side of the cam (12) near the second shaft post (13).

6. The eccentric shaft fixture according to claim 3, characterized in that: The housing (3) is provided with a plurality of dust removal holes (35), the dust removal holes (35) are distributed along the circumference of the housing (3), the dust removal holes (35) penetrate the side of the housing (3) near the base (2), and the dust removal holes (35) are connected to the cavity (33).

7. The eccentric shaft fixture according to claim 2, characterized in that: The diameter of the through hole (321) is smaller than the diameter of the bottom of the through groove (32).

8. The eccentric shaft fixture according to claim 1, characterized in that: The wall of the fixed groove (43) is provided with the same number of through holes (431) as the number of adjustment holes (432). The through holes (431) are respectively located on the side of the adjustment hole (432) near the bottom of the fixed groove (43), and the through holes (431) are respectively connected to the adjustment hole (432).

9. The eccentric shaft fixture according to claim 1, characterized in that: The outer peripheral sidewall of the through part (42) is provided with an annular groove (421).

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