CN219900308U - Clamp for machining second connecting hole of rocker arm - Google Patents
Clamp for machining second connecting hole of rocker arm Download PDFInfo
- Publication number
- CN219900308U CN219900308U CN202321114824.2U CN202321114824U CN219900308U CN 219900308 U CN219900308 U CN 219900308U CN 202321114824 U CN202321114824 U CN 202321114824U CN 219900308 U CN219900308 U CN 219900308U
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- China
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- rocker arm
- connecting hole
- pressing plate
- driving cylinder
- drill bit
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- 238000003754 machining Methods 0.000 title abstract description 26
- 238000003825 pressing Methods 0.000 claims abstract description 42
- 239000007788 liquid Substances 0.000 claims description 2
- 238000005553 drilling Methods 0.000 abstract description 14
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000005520 cutting process Methods 0.000 description 15
- 238000000034 method Methods 0.000 description 7
- 238000009825 accumulation Methods 0.000 description 6
- 230000002457 bidirectional effect Effects 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Drilling And Boring (AREA)
Abstract
The utility model discloses a fixture for machining a second connecting hole of a rocker arm, which is characterized in that: comprises a bottom plate, a pillar, a limiting block and a pressing device; the support posts and the limiting blocks are fixedly arranged on the bottom plate and distributed at intervals, and positioning pins matched with the first connecting holes of the rocker arms are arranged on the top surfaces of the support posts; the limiting block is provided with an L-shaped step for limiting contact of the end part of the second side of the rocker arm; a drill bit clearance groove is formed in the middle of the plane of the L-shaped step; the pressing device comprises a pressing plate and a driving cylinder, wherein the output end of the driving cylinder is connected with the pressing plate and can drive the pressing plate to move downwards and then press the middle part of the rocker arm. The utility model can be used for positioning, compacting and clamping the second connecting hole on the second side end part of the rocker arm during drilling, and has the advantages of low cost, low operation difficulty, extremely short clamping time, capability of improving the processing production efficiency, capability of meeting the processing dimensional precision and the like.
Description
Technical Field
The utility model belongs to the technical field of machining clamps, and particularly relates to a clamp for machining a second connecting hole of a rocker arm.
Background
Referring to fig. 1, the outer shape of the rocker arm (also called a brake rocker arm, which belongs to a key core part of a motorcycle brake system) is in a straight shape. During production, the rocker arm is firstly forged into a blank, and then the rocker arm is machined until the technical requirement of assembly is met. The upper process of the rocker arm (N) is to drill first a first connecting hole (N-11) on a first side end (N-1) and drill a second connecting hole (N-21) on a second side end (N-2) during machining.
The applicant has not found a disclosed clamp that can be used in connection with the drilling of the second connecting hole (N-21) in the rocker arm (N).
In addition, when the rocker arm (N) processes the second connecting hole (N-21) in the next process, the requirement of the hole spacing (S) between the first connecting hole (N-11) and the second connecting hole (N-21) on the dimensional accuracy is ensured, and meanwhile, the comprehensive performance requirements of operability, clamp cost, processing efficiency and the like are also considered, so that a new special clamp needs to be developed and designed.
Disclosure of Invention
The utility model provides a fixture for machining a second connecting hole of a rocker arm, which aims to solve the technical problem that the existing known fixture cannot be used for positioning and clamping the rocker arm when the second connecting hole of the rocker arm is machined in the next working procedure.
In order to achieve the above purpose, the scheme of the utility model is as follows: the utility model provides a rocking arm processing second connecting hole anchor clamps which characterized in that: comprises a bottom plate, a pillar, a limiting block and a pressing device; the support posts and the limiting blocks are fixedly arranged on the bottom plate and distributed at intervals, and positioning pins matched with the first connecting holes of the rocker arms are arranged on the top surfaces of the support posts; the limiting block is provided with an L-shaped step for limiting the contact of the second side end part of the rocker arm; a drill bit avoidance groove or a drill bit avoidance hole is formed in the middle of the plane of the L-shaped step; the pressing device comprises a pressing plate and a driving cylinder, wherein the output end of the driving cylinder is connected with the pressing plate and can drive the pressing plate to move downwards and then press the middle part of the rocker arm.
When the fixture is used, the fixture is fixedly arranged on a workbench of a drilling machine through a bottom plate, the position of a drill bit is fixed (the drill bit does not need to be aligned any more during machining and only needs to move up and down), and the distance between the center of the drill bit and the center of a positioning pin is set to be S (namely, the hole distance S between a first connecting hole and a second connecting hole).
During clamping, the first connecting hole of the rocker arm is matched with the positioning pin for positioning, the first side end part of the rocker arm is horizontally supported by the support column, then the rocker arm is rotated, the second side end part of the rocker arm is contacted with the side vertical surface of the L-shaped step and is blocked and limited, and the positioning of the rocker arm is completed at the moment; and then starting the driving cylinder to work and driving the pressing plate to move downwards, and then pressing the middle part of the rocker arm to finish in-place clamping. The drill may then be started to work and the drill bit is fed down to drill the second connection hole. After drilling is completed, the distance between the drill bit and the center of the positioning pin is S, and the hole distance S between the first connecting hole and the second connecting hole is the same, so that the clamp can be used for positioning and clamping when the rocker arm processes the second connecting hole of the clamp, and meanwhile, the requirement on the dimensional precision of the hole distance (S) between the first connecting hole and the second connecting hole can be met.
In addition, the clamp has the advantages of low cost, low operation difficulty, extremely short clamping time, capability of improving the processing production efficiency, capability of meeting the processing dimensional precision and the like.
Preferably, the driving cylinder adopts a telescopic cylinder or a telescopic liquid driving cylinder.
Further, a triangular chip removal guide part is arranged at the inner bottom of the bit avoidance groove. During drilling, drill cuttings falling from the second side end part of the rocker arm enter the drill bit clearance groove and then are discharged downwards automatically by bidirectional inclined diversion of the triangular chip removal diversion part, so that the accumulation of the drill cuttings can be avoided, and meanwhile, the drill cuttings are convenient to clean.
Further, the compressing device also comprises a guide rod; the guide rod is vertically fixed on the bottom plate, and a guide hole for the guide rod to be matched is formed in the pressing plate. When the pressing plate is driven by the driving cylinder to move up and down, the pressing plate is guided to move, so that the stability of the direction of the pressing plate during pressing can be ensured, the pressing plate cannot rotate, and the pressing plate is more stable and reliable after pressing; meanwhile, the driving cylinder is protected from being subjected to steering force during telescopic operation, guiding is stable, precise movement is kept, and the service life is prolonged.
Further, the bit avoidance hole is horn-shaped and the big end of the bit avoidance hole faces downwards. During drilling, the drill cuttings falling from the second side end part of the rocker arm enter the drill bit avoidance hole and are automatically discharged downwards, so that the accumulation of the drill cuttings can be avoided, and cleaning is not required.
The utility model has the beneficial effects that:
the fixture can be used for positioning and clamping when the rocker arm is used for machining the second connecting hole of the rocker arm, and can meet the requirement of the hole distance size precision between the first connecting hole and the second connecting hole of the rocker arm;
secondly, the clamp disclosed by the utility model has the advantages of low cost, low operation difficulty, extremely short clamping time, capability of improving the processing production efficiency, capability of meeting the processing dimensional precision and the like;
thirdly, the inner bottom end of the drill bit clearance groove is provided with the triangular chip removal guiding part, so that drill cuttings falling from the second side end part of the rocker arm enter the drill bit clearance groove during drilling and then are automatically discharged downwards by bidirectional inclined flow distribution of the triangular chip removal guiding part, the accumulation of the drill cuttings can be avoided, and meanwhile, the drill cuttings are convenient to clean;
fourth, the bit avoidance hole is horn-shaped and the big end of the bit avoidance hole faces downwards; during drilling, drill cuttings falling from the second side end part of the rocker arm enter the drill bit avoidance hole and are automatically discharged downwards, so that the accumulation of the drill cuttings can be avoided, and cleaning is not needed.
Drawings
FIG. 1 is a graph comparing changes in the first and second connecting holes on a rocker arm during machining.
Fig. 2 is a front view of a fixture for machining a second connecting hole on a rocker arm according to a first embodiment of the present utility model.
Fig. 3 is a top view of a fixture for machining a second connecting hole of a rocker arm according to a first embodiment of the present utility model.
Fig. 4 is a perspective view of a fixture for machining a second connecting hole of a rocker arm according to a first embodiment of the present utility model.
Fig. 5 is a field reference view (which corresponds to fig. 4 and is substantially the same) of a second attachment hole fixture for machining a rocker arm in accordance with a first embodiment of the present utility model.
Fig. 6 is a front view of a fixture for machining a second connecting hole on a rocker arm when the rocker arm is positioned and pressed.
Fig. 7 is a top view of a fixture for machining a second connecting hole on a rocker arm when the rocker arm is positioned and pressed.
Fig. 8 is a perspective view of a fixture for machining a second connecting hole on a rocker arm when the rocker arm is positioned and pressed.
Fig. 9 is a field reference view (which corresponds to fig. 8 and is substantially the same) of a rocker arm machining second attachment hole fixture at the completion of machining in accordance with a first embodiment of the present utility model.
Fig. 10 is a perspective view of a fixture for machining a second connecting hole on a rocker arm according to a second embodiment of the present utility model.
Fig. 11 is a front view of a fixture for machining a second connecting hole on a rocker arm in a second embodiment of the present utility model when the rocker arm is positioned and pressed.
Fig. 12 is a perspective view of a fixture for machining a second connecting hole on a rocker arm according to a third embodiment of the present utility model.
Fig. 13 is a front view of a fixture for machining a second connecting hole on a rocker arm when the rocker arm is positioned and pressed in accordance with the third embodiment of the present utility model.
Detailed Description
The utility model is further illustrated by the following examples in conjunction with the accompanying drawings:
embodiment one: referring to fig. 2-5, a rocker arm machining second connecting hole fixture comprises a base plate 1, a support column 2, a limiting block 3 and a pressing device 4.
Referring to fig. 2-4, the limiting block 3 and the support post 2 are fixedly arranged on the bottom plate 1 and distributed at intervals left and right.
Referring to fig. 2-4, the center of the top plane of the pillar 2 is fixedly provided with a positioning pin 2-1 for being matched with the first connecting hole N-11 of the rocker arm N.
Specifically, the positioning pin 2-1 and the support column 2 are integrally formed.
Specifically, the outer diameter of the positioning pin 2-1 is matched with the inner diameter of the first connecting hole N-11. During clamping, the positioning pin 2-1 is inserted into the first connecting hole N-11 to be matched and positioned.
Specifically, the outer diameter of the pillar 2 is larger than the inner diameter of the first connecting hole N-11. The top plane of the pillar 2 is used for horizontally supporting the first side end portion N-1 of the swing arm N.
Referring to fig. 4, the limiting block 3 is provided with an L-shaped step 3-1 for limiting contact of the second side end portion N-2 of the rocker arm N. The L-shaped step 3-1 comprises a plane 3-11 and a side vertical surface 3-12.
In this embodiment, in addition, a bit clearance groove 3-21 is formed in the middle of the plane 3-11 of the L-shaped step 3-1.
In this embodiment, the pressing device 4 includes a pressing plate 4-1, a driving cylinder 4-2, and a guide rod 4-3, where an output end of the driving cylinder 4-2 is connected with the pressing plate 4-1 and can drive the pressing plate 4-1 to move downward and then press the middle part of the rocker arm N. Specifically, the driving cylinder 4-2 is vertically and fixedly installed on the bottom plate 1, and the output end of the driving cylinder 4-2 faces upwards and is fixedly connected with the middle part of the pressing plate 4-1.
In this embodiment, the driving cylinder 4-2 may be a telescopic cylinder or a telescopic hydraulic driving cylinder. The pressing plate 4-1 can be driven to move downwards or upwards by the telescopic movement of the output end of the driving cylinder 4-2. While the driving cylinder 4-2 drives the pressing plate 4-1 to move down to press the middle part of the pressing rocker arm N during pressing, while maintaining a pressure state during drilling.
The guide rod 4-3 is vertically fixed on the bottom plate 1, and a guide hole 4-11 for matching the guide rod 4-3 is formed in the pressing plate 4-1. When the pressing plate 4-1 is driven by the driving cylinder to move up and down, the pressing plate 4-1 moves up and down along the guide rod 4-3 in a guiding way, so that the pressing plate can be ensured to keep stable in direction when being pressed, cannot rotate, and is more stable and reliable after being pressed; meanwhile, the driving cylinder is protected from being subjected to steering force during telescopic operation, guiding is stable, precise movement is kept, and the service life is prolonged.
When the fixture is used, the fixture is fixedly arranged on a workbench of a drilling machine through the bottom plate 1, the position of a drill bit is fixed (the drill bit only moves up and down during machining) and is set to be S (namely, the hole distance S between a first connecting hole and a second connecting hole) between the center of the drill bit and the center of the locating pin 2-1.
Referring to fig. 6-9, the method of operation of this embodiment in use is as follows:
the first step: the first connecting hole N-11 of the rocker arm N is matched with the positioning pin 2-1 for positioning, and the first side end part N-1 of the rocker arm N is horizontally supported by the support column 2;
and a second step of: rotating the rocker arm N to enable the second side end part N-1 to be in contact with the side vertical surface 3-12 of the L-shaped step 3-1 and blocked and limited, wherein the rocker arm N is positioned;
and a third step of: starting the driving cylinder 4-2 to work and driving the pressing plate 4-1 to move downwards to press the middle part of the rocker arm N so as to finish positioning and pressing, and then keeping a pressure maintaining state;
fourth step: starting the drilling machine to work and driving the drill bit to move downwards until the drill bit drills through a second connecting hole N-21 on the second side end part N-2 of the rocker arm N; then starting the drill bit to move upwards to realize tool withdrawal and reset to the initial safe height;
fifth step: starting the driving cylinder 4-2 to work and driving the pressing plate 4-1 to move upwards so as to automatically loosen the compression;
sixth step: and (3) pulling out the rocker arm N with the machined second connecting hole N-21 from the support post 2 and the limiting block 3, positioning and placing the next rocker arm N, and repeating the steps one to five to finish machining the second connecting hole N-21 of the next rocker arm N.
Referring to fig. 6-9, after the drilling is completed, the distance between the drill bit and the center of the locating pin 2-1 is S, and the hole distance S between the first connecting hole and the second connecting hole is always the same, so that the fixture can be used for locating and clamping when the rocker arm N processes the second connecting hole N-11, and can meet the requirement of the dimensional accuracy of the hole distance S between the first connecting hole N-11 and the second connecting hole N-21.
In addition, the clamp has the advantages of low cost, low operation difficulty, extremely short clamping time, capability of improving the processing production efficiency, capability of meeting the processing dimensional precision and the like.
Embodiment two: this embodiment is substantially the same as embodiment one, except that:
referring to fig. 10-11, in this embodiment, a bit avoidance hole 3-22 is formed in the middle of the plane 3-11 of the L-shaped step 3-1.
Further, the bit clearance holes 3-22 are horn-shaped with their large ends facing downward. During drilling, the drill cuttings falling from the second side end part N-21 of the rocker arm enter the drill bit avoidance holes 3-22 and are automatically discharged downwards, so that the accumulation of the drill cuttings can be avoided, and cleaning is not needed.
Embodiment III: this embodiment is substantially the same as embodiment one, except that:
referring to fig. 12-13, in this embodiment, a triangular chip removal guiding portion 3-3 is provided at the inner bottom of the bit clearance groove 3-21. During drilling, drill cuttings falling from the second side end part of the rocker arm enter the drill bit avoidance grooves 3-21 and are automatically discharged downwards by bidirectional inclined diversion of the triangular chip removal diversion parts, so that the accumulation of the drill cuttings can be avoided, and meanwhile, the drill cuttings are convenient to clean.
The foregoing describes in detail preferred embodiments of the present utility model. It should be understood that numerous modifications and variations can be made in accordance with the concepts of the utility model by one of ordinary skill in the art without undue burden. Therefore, all technical solutions which can be obtained by logic analysis, reasoning or limited experiments based on the prior art by the person skilled in the art according to the inventive concept shall be within the scope of protection defined by the claims.
Claims (5)
1. The utility model provides a rocking arm processing second connecting hole anchor clamps which characterized in that: comprises a bottom plate (1), a support column (2), a limiting block (3) and a compressing device (4);
the support posts (2) and the limiting blocks (3) are fixedly arranged on the bottom plate (1) and distributed at intervals, and positioning pins (2-1) matched with first connecting holes (N-11) of the rocker arms (N) are arranged on the top surfaces of the support posts (2);
an L-shaped step (3-1) for limiting the contact of the second side end part (N-2) of the rocker arm (N) is arranged on the limiting block (3); a drill bit avoidance groove (3-21) or a drill bit avoidance hole (3-22) is formed in the middle of the plane (3-11) of the L-shaped step (3-1);
the pressing device (4) comprises a pressing plate (4-1) and a driving cylinder (4-2), wherein the output end of the driving cylinder (4-2) is connected with the pressing plate (4-1) and can drive the pressing plate (4-1) to move downwards and then press the middle part of the rocker arm (N).
2. A rocker arm tooling second attachment hole fixture as defined in claim 1, wherein: the driving cylinder (4-2) adopts a telescopic cylinder or a telescopic liquid driving cylinder.
3. A rocker arm tooling second attachment hole fixture as defined in claim 1, wherein: the inner bottom of the drill bit clearance groove (3-21) is provided with a triangular chip removal guiding part (3-3).
4. A rocker arm tooling second attachment hole fixture as defined in claim 1, wherein: the compressing device (4) further comprises a guide rod (4-3);
the guide rod (4-3) is vertically fixed on the bottom plate (1), and a guide hole (4-11) for matching the guide rod (4-3) is formed in the pressing plate (4-1).
5. A rocker arm tooling second attachment hole fixture as defined in claim 1, wherein: the bit avoidance holes (3-22) are horn-shaped and the big ends of the bit avoidance holes are downward.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321114824.2U CN219900308U (en) | 2023-05-10 | 2023-05-10 | Clamp for machining second connecting hole of rocker arm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321114824.2U CN219900308U (en) | 2023-05-10 | 2023-05-10 | Clamp for machining second connecting hole of rocker arm |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219900308U true CN219900308U (en) | 2023-10-27 |
Family
ID=88467691
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321114824.2U Active CN219900308U (en) | 2023-05-10 | 2023-05-10 | Clamp for machining second connecting hole of rocker arm |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219900308U (en) |
-
2023
- 2023-05-10 CN CN202321114824.2U patent/CN219900308U/en active Active
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