CN212822833U - Eccentric clamp for boring pin hole of motorcycle crankshaft - Google Patents
Eccentric clamp for boring pin hole of motorcycle crankshaft Download PDFInfo
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- CN212822833U CN212822833U CN202021382911.2U CN202021382911U CN212822833U CN 212822833 U CN212822833 U CN 212822833U CN 202021382911 U CN202021382911 U CN 202021382911U CN 212822833 U CN212822833 U CN 212822833U
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- expansion
- eccentric
- crank
- hole
- seat
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Abstract
The utility model discloses a motorcycle crankshaft pin hole bore hole eccentric fixture, which comprises an eccentric seat, wherein the eccentric seat is provided with an eccentric hole for installing a crank to be processed, the axis of the eccentric hole is parallel to the rotating axis of the eccentric seat, and the distance between the axis of the eccentric hole and the rotating axis of the eccentric seat is equal to the distance between the axis of the pin hole and the axis of the crank rod part; a crank expansion clamping mechanism for clamping and fixing a crank to be processed is arranged in the eccentric hole; the crank expansion clamping mechanism comprises an expansion outer sleeve and an expansion inner sleeve sleeved in the expansion outer sleeve, a containing groove for containing the crank rod part is arranged in the expansion inner sleeve, and an expansion inner section which is in positioning fit with the crank rod part is arranged at one end, close to a notch, of the containing groove; the expansion outer sleeve is provided with an expansion outer section matched with the expansion inner section, and at least three expansion joints extending along the generatrix direction of the expansion inner section are annularly distributed on the expansion inner section; and the eccentric seat is provided with an expansion driving mechanism for driving the expansion inner sleeve to move along the axial direction of the expansion outer sleeve.
Description
Technical Field
The utility model belongs to the technical field of mechanical frock clamp, specific be an eccentric anchor clamps of motorcycle bent axle pinhole bore hole.
Background
Fig. 1 is a schematic structural diagram of a conventional crank. The crank comprises a crank handle part 2 and a crank rod part 3, wherein the crank handle part 2 is provided with a pin hole 4 for mounting a crankshaft pin. The pin hole 4 is eccentrically provided with respect to the crank shaft portion 3, and therefore, the pin hole 4 cannot be directly bored.
Disclosure of Invention
In view of this, the utility model aims at providing a motorcycle crankshaft pinhole bore hole eccentric fixture to satisfy the requirement to crankshaft pinhole bore hole processing.
In order to achieve the above purpose, the utility model provides a following technical scheme:
a motorcycle crankshaft pin hole boring eccentric clamp comprises an eccentric seat, wherein an eccentric hole used for installing a crank to be machined is formed in the eccentric seat, the axis of the eccentric hole is parallel to the rotating axis of the eccentric seat, and the distance between the axis of the eccentric hole and the rotating axis of the eccentric seat is equal to the distance between the axis of a pin hole and the axis of a crank rod part;
a crank expansion clamping mechanism for clamping and fixing a crank to be processed is arranged in the eccentric hole;
the crank expansion clamping mechanism comprises an expansion outer sleeve and an expansion inner sleeve sleeved in the expansion outer sleeve, a containing groove used for containing the crank rod part is arranged in the expansion inner sleeve, and an expansion inner section which is in positioning fit with the crank rod part is arranged at one end, close to a notch, of the containing groove;
the expansion outer sleeve is provided with an expansion outer section matched with the expansion inner section, the inner wall of the expansion outer section is conical, and the inner diameter of the expansion outer section is gradually reduced along the direction of the groove opening of the accommodating groove pointing to the groove bottom; the outer wall of the expansion inner section is conical, the outer diameter of the outer wall of the expansion inner section is gradually reduced along the direction of the groove bottom of the accommodating groove, and at least three expansion seams extending along the generatrix direction of the expansion inner section are annularly distributed on the expansion inner section;
and the eccentric seat is provided with an expansion driving mechanism for driving the expansion inner sleeve to move along the axial direction of the expansion outer sleeve.
Further, the expansion driving mechanism comprises a sliding block arranged in the eccentric seat and a pull rod used for driving the sliding block to move along the axial direction of the expansion inner sleeve; the bottom of the accommodating groove is provided with a connecting through hole, the expansion inner sleeve is fixedly connected with the sliding blocks through connecting bolts which penetrate through the connecting through holes, and limit nuts which are positioned between the expansion inner sleeve and the sliding blocks are arranged on the connecting bolts.
Furthermore, the pull rod is sleeved with a rotary seat which rotates synchronously with the pull rod, and the rotary seat is fixedly connected with the eccentric seat.
Furthermore, a positioning block is arranged between the rotary seat and the eccentric seat, and a conical surface positioning structure is arranged between the rotary seat and the positioning block.
Furthermore, a conical boss is arranged on the end face, facing the eccentric seat, of the rotary seat, and a conical groove matched with the conical boss is arranged on the positioning block.
Further, the pull rod is coaxial with the rotating axis of the eccentric seat.
Further, the expansion outer sleeve is close to one end of the accommodating groove opening and is provided with a connecting flange extending outwards in the radial direction.
Furthermore, a positioning surface is arranged on the outer wall of one side of the expansion inner sleeve, and a positioning screw matched with the positioning surface is arranged on the expansion outer sleeve.
Furthermore, a yielding groove is correspondingly arranged between the expansion outer sleeve and the expansion inner sleeve and corresponds to the pin hole.
Further, the inner diameter of the abdicating groove is larger than that of the pin hole.
The beneficial effects of the utility model reside in that:
the eccentric clamp for boring the pin hole of the motorcycle crankshaft of the utility model sets the eccentric hole on the eccentric seat, and sets the eccentricity of the eccentric hole relative to the rotation axis of the eccentric seat equal to the axial line distance between the pin hole of the crank to be machined and the crank rod part, so that after the crank to be machined is positioned and installed in the eccentric hole, the axial line of the pin hole is coaxial with the axial line of the rotating shaft, and the eccentric seat is rotated to realize the machining of boring the pin hole and the like; through setting up the tight clamping mechanism that expands of crank, through set up the tight inner segment that expands and the tight outer section that expands of mutually supporting between the tight endotheca that expands and the tight overcoat that expands, the tight endotheca that expands of drive removes for the tight overcoat that expands, combines to set up the tight seam that expands on the tight inner segment that expands, can drive the internal diameter of the tight inner segment that expands and change, and then the tight crank rod portion that presss from both sides that expands, realizes the tight technical purpose that presss from both sides that expands in crank rod portion.
Drawings
In order to make the purpose, technical scheme and beneficial effect of the utility model clearer, the utility model provides a following figure explains:
FIG. 1 is a schematic structural diagram of a conventional crank;
fig. 2 is a schematic structural view of an embodiment of the eccentric fixture for boring the pin hole of the motorcycle crankshaft of the present invention.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and can implement the present invention, but the embodiments are not to be construed as limiting the present invention.
As shown in FIG. 2, it is a schematic structural view of an embodiment of the eccentric clamp for boring a crank pin hole of a motorcycle according to the present invention. The eccentric clamp for boring the pin hole of the motorcycle crankshaft comprises an eccentric seat 11, wherein an eccentric hole 12 used for installing the crank 1 to be machined is formed in the eccentric seat 11, the axis of the eccentric hole 12 is parallel to the rotating axis of the eccentric seat 11, and the distance between the axis of the eccentric hole 12 and the rotating axis of the eccentric seat 11 is equal to the distance between the axis of the pin hole 4 and the axis of the crank rod part 3.
A crank expansion clamping mechanism for clamping and fixing the crank 1 to be processed is arranged in the eccentric hole 12 of the embodiment. The crank expansion clamping mechanism comprises an expansion outer sleeve 13 and an expansion inner sleeve 14 sleeved in the expansion outer sleeve 13, an accommodating groove 15 used for accommodating the crank rod part 3 is formed in the expansion inner sleeve 14, and an expansion inner section 16 matched with the crank rod part 3 in a positioning mode is arranged at one end, close to a notch, of the accommodating groove 15. The expansion outer sleeve 13 is provided with an expansion outer section matched with the expansion inner section 16, the inner wall of the expansion outer section is conical, and the inner diameter of the expansion outer section is gradually reduced along the direction of the notch of the accommodating groove 15 pointing to the groove bottom; the outer wall of the expansion inner section 16 is conical, the outer diameter of the expansion inner section is gradually reduced along the direction of the groove bottom of the accommodating groove 15, and at least three expansion seams 17 extending along the generatrix direction of the expansion inner section 16 are annularly distributed on the expansion inner section; the eccentric seat 11 is provided with an expansion driving mechanism for driving the expansion inner sleeve 14 to move relative to the expansion outer sleeve 13 in the axial direction thereof.
Specifically, the one end that the tight overcoat 13 of expanding of this embodiment is close to holding tank 15 notch is equipped with the flange 25 that radially outwards extends, and it is equipped with the groove of stepping down 26 to correspond with pinhole 4 between tight overcoat 13 and the tight endotheca 14 that expands, and the internal diameter of the groove of stepping down 26 is greater than the internal diameter of pinhole 4, prevents to produce in the pinhole bore hole course of working and interferes.
Further, the expansion driving mechanism of the present embodiment includes a slider 18 provided in the eccentric seat 11 and a pull rod 19 for driving the slider 18 to move in the axial direction of the expansion inner sleeve 14; the bottom of the accommodating groove 15 is provided with a connecting through hole, the expansion inner sleeve 14 is fixedly connected with the sliding block 18 through a connecting bolt 20 penetrating through the connecting through hole, and the connecting bolt 20 is provided with a limit nut 21 positioned between the expansion inner sleeve 14 and the sliding block 18, so that the connecting bolt 20 cannot move relative to the expansion inner sleeve 14.
The tie rod 19 of the present embodiment is coaxial with the axis of rotation of the eccentric 11. The outer wall of one side of the expansion inner sleeve 14 of the embodiment is provided with a positioning surface 27, and the expansion outer sleeve 13 is provided with a positioning screw 28 matched with the positioning surface 27.
Furthermore, a rotary seat 22 rotating synchronously with the pull rod 19 is sleeved on the pull rod 19, and the rotary seat 22 is fixedly connected with the eccentric seat 11. In this embodiment, a positioning block 23 is disposed between the rotary seat 22 and the eccentric seat 11, and a conical surface positioning structure is disposed between the rotary seat 22 and the positioning block 23. Specifically, a conical boss 24 is arranged on the end surface of the rotary seat 22 facing the eccentric seat 11, and a conical groove matched with the conical boss is arranged on the positioning block 23.
According to the eccentric clamp for boring the pin hole of the motorcycle crankshaft, the eccentric hole is formed in the eccentric seat, the eccentric distance of the eccentric hole relative to the rotating axis of the eccentric seat is equal to the axial distance between the pin hole of the crankshaft to be machined and the rod part of the crankshaft, so that the axial line of the pin hole is coaxial with the axial line of the rotating shaft after the crankshaft to be machined is positioned and installed in the eccentric hole, and the pin hole can be bored by rotating the eccentric seat; through setting up the tight clamping mechanism that expands of crank, through set up the tight inner segment that expands and the tight outer section that expands of mutually supporting between the tight endotheca that expands and the tight overcoat that expands, the tight endotheca that expands of drive removes for the tight overcoat that expands, utilizes the tight seam that expands that sets up on the tight inner segment that expands, can drive the internal diameter of the tight inner segment that expands and change, and then the tight crank rod portion that presss from both sides that expands, realizes the tight technical purpose that presss from both sides that expands in crank rod portion.
The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. Equivalent substitutes or changes made by the technical personnel in the technical field on the basis of the utility model are all within the protection scope of the utility model. The protection scope of the present invention is subject to the claims.
Claims (10)
1. The utility model provides a motorcycle bent axle pinhole bore hole eccentric fixture which characterized in that: the crank shaft machining device comprises an eccentric seat (11), wherein an eccentric hole (12) used for mounting a crank (1) to be machined is formed in the eccentric seat (11), the axis of the eccentric hole (12) is parallel to the rotating axis of the eccentric seat (11), and the distance between the axis of the eccentric hole (12) and the rotating axis of the eccentric seat (11) is equal to the distance between the axis of a pin hole (4) and the axis of a crank shaft part (3);
a crank expansion clamping mechanism for clamping and fixing the crank (1) to be processed is arranged in the eccentric hole (12);
the crank expansion clamping mechanism comprises an expansion outer sleeve (13) and an expansion inner sleeve (14) sleeved in the expansion outer sleeve (13), an accommodating groove (15) used for accommodating the crank rod part (3) is formed in the expansion inner sleeve (14), and an expansion inner section (16) in positioning fit with the crank rod part (3) is arranged at one end, close to a notch, of the accommodating groove (15);
the expansion outer sleeve (13) is provided with an expansion outer section matched with the expansion inner section (16), the inner wall of the expansion outer section is conical, and the inner diameter of the expansion outer section is gradually reduced along the direction of the groove bottom of the accommodating groove (15) pointing to the groove bottom; the outer wall of the expansion inner section (16) is conical, the outer diameter of the expansion inner section is gradually reduced along the direction of the notch of the accommodating groove (15) pointing to the groove bottom, and at least three expansion seams (17) extending along the generatrix direction of the expansion inner section (16) are annularly distributed on the expansion inner section;
and an expansion driving mechanism for driving the expansion inner sleeve (14) to move along the axial direction of the expansion outer sleeve (13) relative to the expansion outer sleeve is arranged on the eccentric seat (11).
2. The eccentric clamp of motorcycle crank pin hole boring hole according to claim 1, characterized in that: the expansion driving mechanism comprises a sliding block (18) arranged in the eccentric seat (11) and a pull rod (19) used for driving the sliding block (18) to move along the axial direction of the expansion inner sleeve (14); the bottom of the accommodating groove (15) is provided with a connecting through hole, the expansion inner sleeve (14) is fixedly connected with the sliding block (18) through a connecting bolt (20) which penetrates through the connecting through hole, and a limiting nut (21) which is positioned between the expansion inner sleeve (14) and the sliding block (18) is arranged on the connecting bolt (20).
3. The eccentric clamp of motorcycle crankshaft pin hole boring hole of claim 2, characterized in that: the pull rod (19) is sleeved with a rotary seat (22) which rotates synchronously with the pull rod, and the rotary seat (22) is fixedly connected with the eccentric seat (11).
4. A motorcycle crankshaft pin hole boring eccentric clamp according to claim 3, characterized in that: a positioning block (23) is arranged between the rotary seat (22) and the eccentric seat (11), and a conical surface positioning structure is arranged between the rotary seat (22) and the positioning block (23).
5. The eccentric clamp of motorcycle crankshaft pin hole bore hole of claim 4, characterized in that: the end face, facing the eccentric seat (11), of the rotary seat (22) is provided with a conical boss (24), and the positioning block (23) is provided with a conical groove matched with the conical boss.
6. The eccentric clamp of motorcycle crankshaft pin hole boring hole of claim 2, characterized in that: the pull rod (19) is coaxial with the rotation axis of the eccentric seat (11).
7. The eccentric clamp of motorcycle crankshaft pin hole boring hole of claim 2, characterized in that: and a positioning surface (27) is arranged on the outer wall of one side of the expansion inner sleeve (14), and a positioning screw (28) matched with the positioning surface (27) is arranged on the expansion outer sleeve (13).
8. The eccentric clamp of motorcycle crank pin hole boring hole according to claim 1, characterized in that: one end of the expansion outer sleeve (13) close to the notch of the accommodating groove (15) is provided with a connecting flange (25) extending outwards in the radial direction.
9. The eccentric clamp of motorcycle crank pin hole boring hole according to claim 1, characterized in that: and a yielding groove (26) is correspondingly arranged between the expansion outer sleeve (13) and the expansion inner sleeve (14) and corresponding to the pin hole (4).
10. The motorcycle crankshaft pin hole boring eccentric clamp of claim 9, wherein: the inner diameter of the abdicating groove (26) is larger than that of the pin hole (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021382911.2U CN212822833U (en) | 2020-07-14 | 2020-07-14 | Eccentric clamp for boring pin hole of motorcycle crankshaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021382911.2U CN212822833U (en) | 2020-07-14 | 2020-07-14 | Eccentric clamp for boring pin hole of motorcycle crankshaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212822833U true CN212822833U (en) | 2021-03-30 |
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ID=75115272
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021382911.2U Active CN212822833U (en) | 2020-07-14 | 2020-07-14 | Eccentric clamp for boring pin hole of motorcycle crankshaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212822833U (en) |
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2020
- 2020-07-14 CN CN202021382911.2U patent/CN212822833U/en active Active
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