CN115464555A - Automobile part clamping mechanism - Google Patents
Automobile part clamping mechanism Download PDFInfo
- Publication number
- CN115464555A CN115464555A CN202211170753.8A CN202211170753A CN115464555A CN 115464555 A CN115464555 A CN 115464555A CN 202211170753 A CN202211170753 A CN 202211170753A CN 115464555 A CN115464555 A CN 115464555A
- Authority
- CN
- China
- Prior art keywords
- unit
- clamping
- piston rod
- overturning
- friction block
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B41/00—Component parts such as frames, beds, carriages, headstocks
- B24B41/06—Work supports, e.g. adjustable steadies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B9/00—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor
- B24B9/02—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground
- B24B9/04—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of metal, e.g. skate blades
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Jigs For Machine Tools (AREA)
Abstract
The invention belongs to the technical field of production and processing of automobile parts, and particularly relates to an automobile part clamping mechanism which comprises a clamping unit, a turning unit, a locking unit and a lifting unit positioning unit. The small end of the piston rod is clamped by the clamping unit, the clamping unit is turned from a vertical state to a horizontal state by the turning unit, the piston rod synchronously turns along with the clamping unit in the process, and the clamping unit is rotationally connected with the turning unit, so that the piston rod can swing to a vertically suspended state under the action of self gravity after the clamping unit is turned to the horizontal state, the piston rod is positioned by the positioning unit at the moment and prevented from swinging back and forth, then the clamping unit is locked by the locking unit, the piston rod is completely fixed, and finally the positioning unit is removed from the piston cylinder to avoid a path when a grinding tool is fed; the piston rod grinding machine and the simplified structure thereof realize quick clamping and accurate positioning of the piston rod, and improve the grinding processing efficiency of the piston rod.
Description
Technical Field
The invention belongs to the technical field of production and processing of automobile parts, and particularly relates to an automobile part clamping mechanism.
Background
After the initial forming of the automobile casting, parting stripes, also called burrs, are generated on the surface, and the burr parts need to be ground and flattened before the casting is subjected to finish machining. Because the shapes of general castings are complex, the casting is polished by a multi-degree-of-freedom mechanical arm in the existing mainstream technology, in order to ensure that the preset path of the mechanical arm is matched with the actual path of the surface of a workpiece, the workpiece must be accurately positioned before processing, however, the positioning and transferring mechanism in the prior art is complex in structure and often needs to be accompanied with manual operation, for example, a cast piston rod needs to be manually installed in a jig and fixed in the polishing process, the jig is placed on a workbench of a numerical control polishing machine, the operation process is complex, and the processing efficiency is low.
Disclosure of Invention
The invention aims to provide an automobile part clamping mechanism which can effectively improve the grabbing and positioning efficiency of a piston rod, further improve the machining efficiency, simplify the equipment structure and reduce the equipment cost.
The technical scheme adopted by the invention is as follows:
a clamping mechanism for clamping a piston rod to grind the circumferential wall of the piston rod comprises
The clamping unit is inserted into a central hole at the small end of the piston rod and is provided with an expansion and contraction unit which moves along the radial direction of the central hole so as to clamp the inner wall of the central hole;
the overturning unit is used for installing the clamping unit, and the clamping unit is rotationally connected with the overturning unit;
the clamping unit can be locked in a state of being relatively fixed with the overturning unit when the locking unit is positioned at the locking station, and the clamping unit can freely rotate relative to the overturning unit when the locking unit is positioned at the unlocking station;
the lifting unit is used for installing the overturning unit, and the overturning unit is rotationally connected with the lifting unit so as to enable the clamping unit to be switched between a vertical state and a horizontal state;
the positioning unit is installed on the overturning unit, when the overturning unit overturns to enable the clamping unit to be in a horizontal state, the positioning unit can abut against the side wall of the piston rod which is picked up on the clamping unit and is in a natural suspension state, and the positioning unit is movably connected with the overturning unit so as to enable the positioning unit to be removed from the side wall of the piston rod.
The clamping unit comprises an expansion sleeve which is rotatably connected with the overturning unit, a telescopic rod is inserted in the expansion sleeve in a penetrating manner, the telescopic rod is movably connected with the overturning unit along the circumferential direction, a first driving unit used for driving the telescopic rod to move is arranged on the overturning unit, and conical step parts which are mutually abutted are arranged on the inner wall of the expansion sleeve and the outer wall of the telescopic rod, so that the expansion sleeve can be driven to expand along the radial direction when the telescopic rod moves relative to the expansion sleeve.
The locking unit comprises a friction block, the friction block is movably connected with the overturning unit along the radial direction of the clamping unit, and a second driving unit used for driving the friction block to compress and keep away from the clamping unit is arranged on the overturning unit.
And a linkage mechanism is arranged between the positioning unit and the locking unit and is assembled to drive the positioning unit to be removed from the side wall of the piston rod when the second driving unit drives the friction block to tightly press the clamping unit.
The positioning unit comprises a positioning rod, the positioning rod is fixedly connected with a swing arm, and the swing arm is rotatably connected with the overturning unit.
The second driving mechanism comprises a cam which is rotationally connected with the overturning unit, the wheel surface of the cam is abutted against the friction block, an elastic unit is arranged between the friction block and the overturning unit, and the elastic unit is assembled in such a way that the elastic force of the elastic unit acting on the friction block is opposite to the pressure direction of the cam acting on the friction block; the linkage mechanism is assembled to drive the swing arm to rotate in the process that the cam pushes the friction block to a pressing state and continues to rotate.
The linkage mechanism comprises a first grooved wheel and a swing rod which are fixedly connected with a rotating shaft of the cam, and a second grooved wheel which is fixedly connected with a rotating shaft of the swing arm, wherein the edge of the second grooved wheel is provided with an arc-shaped groove with the diameter consistent with that of the first grooved wheel, one end of the arc-shaped groove is provided with a strip groove which is radially arranged along the second grooved wheel, the end part of the swing rod is provided with a guide pin, the guide pin can be meshed with the strip groove in the swing process of the swing rod, and an avoiding groove which is used for avoiding the second grooved wheel is arranged at the position, corresponding to the guide pin, of the first grooved wheel.
The first driving unit is an air cylinder or an electric cylinder, and the telescopic rod is connected to the output part of the air cylinder or the electric cylinder.
The second driving unit further comprises a servo motor, and a rotating shaft of the cam is connected to an output shaft of the servo motor.
The friction block is connected with a guide sleeve arranged on the turnover unit in a sliding mode through a guide rod, and the elastic unit is a pressure spring arranged between the guide sleeve and the friction block.
The invention has the technical effects that:
the small end of the piston rod is clamped by the clamping unit, the clamping unit is turned from a vertical state to a horizontal state by the turning unit, the piston rod synchronously turns along with the clamping unit in the process, and the clamping unit is rotationally connected with the turning unit, so that the piston rod can swing to a vertical suspension state under the action of self gravity after the clamping unit is turned to the horizontal state, the piston rod is positioned by the positioning unit at the moment and prevented from swinging back and forth, then the clamping unit is locked by the locking unit, the piston rod is completely fixed, and finally the positioning unit is removed from the piston cylinder to avoid a path when a grinding tool is fed; the piston rod grinding machine and the simplified structure thereof realize quick clamping and accurate positioning of the piston rod, improve the grinding efficiency of the piston rod and reduce the equipment cost;
the expansion sleeve type piston rod clamping device has the advantages that the expansion sleeve is utilized to clamp the piston rod from the inner side of the central hole at the small end of the piston rod, the outer contour of the piston rod can be fully exposed under a grinding cutter, and the interference of a clamping mechanism and a feed route of the grinding cutter is avoided;
the clamping unit is circumferentially fixed by utilizing the static friction force between the friction block and the clamping unit, and the clamping unit can be locked at any rotation angle, so that the circumferential positioning precision of the piston rod is improved. In the practical implementation process, anti-skid lines can be arranged on the outer wall of the clamping unit and the friction block to improve the static friction force;
the cam mechanism and the geneva mechanism are adopted to realize linkage matching between the friction block and the positioning rod, after the clamping unit is turned to a horizontal state, the piston rod is waited to swing to a vertical suspension state, then the cam is driven to rotate, the cam presses the friction block on the outer wall of the clamping unit, and at the moment, the piston rod is completely fixed without positioning of the positioning rod; the cam continues to rotate, the guide pin is meshed with the strip groove, the swing arm and the cam rotate synchronously and reversely, so that the positioning rod is separated from the side wall of the piston rod to avoid a feed path of a grinding tool, the whole process only needs to drive the cam to rotate, and the equipment structure and the control flow are greatly simplified.
Drawings
Fig. 1 is a perspective view of an automobile part gripping mechanism according to an embodiment of the present invention;
fig. 2 is a side view of an automobile part gripping mechanism provided by an embodiment of the present invention;
FIG. 3 isbase:Sub>A cross-sectional view A-A of FIG. 2;
FIG. 4 is a cross-sectional view B-B of FIG. 2;
FIG. 5 is a cross-sectional view C-C of FIG. 3;
fig. 6 is a schematic view of an internal transmission structure of the automobile part clamping mechanism provided by the embodiment of the invention;
fig. 7 is a perspective view of one of the stations of the automobile part clamping mechanism in a use state according to the embodiment of the invention;
fig. 8 is a perspective view of another station of the automobile part clamping mechanism in a use state according to the embodiment of the invention;
fig. 9 is a side view of one of the stations of the automobile part clamping mechanism in a use state according to the embodiment of the invention;
fig. 10 is a side view of another station of the automobile part clamping mechanism in a use state according to the embodiment of the invention;
fig. 11 is a front view of one of the stations of the automobile part clamping mechanism in a use state according to the embodiment of the invention;
fig. 12 is a front view of another working position of the automobile part clamping mechanism in a use state according to the embodiment of the invention;
FIGS. 7, 9 and 11 are different views of the same station; FIGS. 8, 10, 12 are different views of the same station; FIGS. 9 and 10 are the same perspective of the different stations; fig. 11 and 12 are the same view of the different stations.
Detailed Description
In order that the objects and advantages of the invention will be more clearly understood, the following description is given in conjunction with the accompanying examples. It is to be understood that the following text is merely illustrative of one or more specific embodiments of the invention and does not strictly limit the scope of the invention as specifically claimed.
As shown in fig. 1 and 2, an automobile part clamping mechanism for clamping a piston rod 1 to grind the peripheral wall of the piston rod 1 comprises a clamping unit for inserting into a central hole of the small end of the piston rod 1, the clamping unit having an expansion and contraction unit moving along the radial direction of the central hole to clamp the inner wall of the central hole; the overturning unit 10 is used for installing the clamping unit, and the clamping unit is rotatably connected with the overturning unit 10; a locking unit, which is arranged on the turning unit 10, and is assembled to have a locking station and an unlocking station, wherein when the locking unit is in the locking station, the clamping unit can be locked in a state of keeping relatively fixed with the turning unit 10, and when the locking unit is in the unlocking station, the clamping unit can freely rotate relative to the turning unit 10; a lifting unit (not shown) for installing the turning unit 10, wherein the turning unit 10 is rotatably connected with the lifting unit so that the gripping unit can be switched between a vertical state and a horizontal state; and the positioning unit is arranged on the overturning unit 10, when the overturning unit 10 overturns to enable the clamping unit to be in a horizontal state, the positioning unit can be abutted against the side wall of the piston rod 1 picked up by the clamping unit and in a natural suspension state, and the positioning unit is movably connected with the overturning unit 10 so as to enable the positioning unit to be removed from the side wall of the piston rod 1. Referring to fig. 7-12, in the present invention, the small end of the piston rod 1 is clamped by the clamping unit, the clamping unit is turned from the vertical state to the horizontal state by the turning unit 10, in the process, the piston rod 1 is turned synchronously with the clamping unit, and since the clamping unit is rotationally connected with the turning unit 10, after the clamping unit is turned to the horizontal state, the piston rod 1 can swing to the vertically suspended state under the action of its own gravity, at this time, the positioning unit positions the piston rod 1 to prevent it from swinging back and forth, then the locking unit locks the clamping unit, thereby completely fixing the piston rod 1, and finally, the positioning unit is removed from the piston cylinder to avoid the path when the grinding tool is fed; the piston rod 1 is clamped quickly and positioned accurately by the aid of the piston rod clamping device and the simplified structure, grinding efficiency of the piston rod 1 is improved, and equipment cost is reduced.
Preferably, as shown in fig. 5, the clamping unit includes an expansion sleeve 11 rotatably connected to the turning unit 10, a telescopic rod 12 is inserted into the expansion sleeve 11, the telescopic rod 12 is movably connected to the turning unit 10 along the circumferential direction, a first driving unit for driving the telescopic rod 12 to move is arranged on the turning unit 10, and tapered step portions abutting against each other are arranged on the inner wall of the expansion sleeve 11 and the outer wall of the telescopic rod 12, so that the expansion sleeve 11 can be driven to expand along the radial direction when the telescopic rod 12 moves relative to the expansion sleeve 11. According to the invention, the expansion sleeve 11 is utilized to clamp the piston rod 1 from the inner side of the central hole at the small end of the piston rod 1, so that the outer contour of the piston rod 1 can be fully exposed under a grinding cutter, and the interference between a clamping mechanism and a feed route of the grinding cutter is avoided.
Preferably, as shown in fig. 3 and 6, the locking unit includes a friction block 14, the friction block 14 is movably connected to the flipping unit 10 along a radial direction of the gripping unit, and a second driving unit for driving the friction block 14 to press against and move away from the gripping unit is disposed on the flipping unit 10. The clamping unit is circumferentially fixed by utilizing the static friction force between the friction block 14 and the clamping unit, and the clamping unit can be locked at any rotation angle, so that the circumferential positioning precision of the piston rod 1 is improved. In practical implementation, the outer wall of the gripping unit and the friction block 14 may be provided with anti-slip lines to improve the static friction force.
Further, as shown in fig. 3, 4 and 6, a linkage mechanism is provided between the positioning unit and the locking unit, and the linkage mechanism is configured to drive the positioning unit to be removed from the side wall of the piston rod 1 when the friction block 14 is driven by the second driving unit to press the gripping unit. The positioning unit comprises a positioning rod 13, the positioning rod 13 is fixedly connected with a swing arm 131, and the swing arm 131 is rotatably connected with the overturning unit 10. The second driving mechanism comprises a cam 15 which is rotationally connected with the overturning unit 10, the wheel surface of the cam 15 is abutted with the friction block 14, an elastic unit 141 is arranged between the friction block 14 and the overturning unit 10, and the elastic unit 141 is assembled in a way that the elastic force acting on the friction block 14 is opposite to the pressure direction acting on the friction block 14 by the cam 15; further, the linkage mechanism is configured to drive the swing arm 131 to rotate after the cam 15 pushes the friction block 14 to the pressed state and during the process of continuing to rotate. Specifically, as shown in fig. 4 and 6, the linkage mechanism includes a first sheave 16 and a swing link 18 fixedly connected to a rotating shaft of the cam 15, and a second sheave 17 fixedly connected to a rotating shaft of the swing arm 131, an arc-shaped groove having a diameter identical to that of the first sheave 16 is disposed at an edge of the second sheave 17, a strip groove 171 radially disposed along the second sheave 17 is disposed at one end of the arc-shaped groove, a guide pin 181 is disposed at an end of the swing link 18, the guide pin 181 can be engaged with the strip groove 171 in a swing process of the swing link 18, and an avoiding groove for avoiding the second sheave 17 is disposed at a position on the first sheave 16 corresponding to the guide pin 181. The invention adopts the cam 15 mechanism and the geneva mechanism to realize linkage matching between the friction block 14 and the positioning rod 13, after the clamping unit is turned over to the horizontal state, the piston rod 1 is waited to swing to the vertical suspension state, then the cam 15 is driven to rotate, the cam 15 presses the friction block 14 on the outer wall of the clamping unit, at the moment, the piston rod 1 is completely fixed, and the positioning of the positioning rod 13 is not needed any more; the cam 15 continues to rotate, so that the guide pin 181 is meshed with the groove 171, and the swing arm 131 and the cam 15 synchronously rotate in the opposite direction, so that the positioning rod 13 is separated from the side wall of the piston rod 1 to avoid a feed path of a grinding tool, the whole process only needs to drive the cam 15 to rotate, and the equipment structure and the control flow are greatly simplified.
Preferably, in the embodiment of the present invention, the first driving unit is a pneumatic cylinder or an electric cylinder, and the telescopic rod 12 is connected to an output portion of the pneumatic cylinder or the electric cylinder. The second driving unit further includes a servo motor, and a rotation shaft of the cam 15 is connected to an output shaft of the servo motor. The friction block 14 is slidably connected with a guide sleeve arranged on the turnover unit 10 through a guide rod, and the elastic unit 141 is a pressure spring arranged between the guide sleeve and the friction block 14.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be construed as the protection scope of the present invention. Structures, devices, and methods of operation not specifically described or illustrated herein are not specifically illustrated or described, but are instead contemplated to be practiced in the art by those skilled in the art.
Claims (10)
1. A clamping mechanism for automobile parts is used for clamping a piston rod to grind the circumferential wall of the piston rod, and is characterized by comprising
The clamping unit is inserted into a central hole at the small end of the piston rod and is provided with an expansion and contraction unit which moves along the radial direction of the central hole so as to clamp the inner wall of the central hole;
the overturning unit is used for installing the clamping unit, and the clamping unit is rotationally connected with the overturning unit;
the clamping unit can be locked in a state of being relatively fixed with the overturning unit when the locking unit is positioned at the locking station, and the clamping unit can freely rotate relative to the overturning unit when the locking unit is positioned at the unlocking station;
the lifting unit is used for installing the overturning unit, and the overturning unit is rotationally connected with the lifting unit so as to enable the clamping unit to be switched between a vertical state and a horizontal state;
the positioning unit is installed on the overturning unit, when the overturning unit overturns to enable the clamping unit to be in a horizontal state, the positioning unit can abut against the side wall of the piston rod which is picked up on the clamping unit and is in a natural suspension state, and the positioning unit is movably connected with the overturning unit so as to enable the positioning unit to be removed from the side wall of the piston rod.
2. The automobile part clamping mechanism as claimed in claim 1, wherein the clamping unit includes an expansion sleeve rotatably connected to the turning unit, a telescopic rod is inserted into the expansion sleeve, the telescopic rod is movably connected to the turning unit along a circumferential direction, the turning unit is provided with a first driving unit for driving the telescopic rod to move, and tapered step portions abutting against each other are provided on an inner wall of the expansion sleeve and an outer wall of the telescopic rod, so that the expansion sleeve can be driven to expand radially when the telescopic rod moves relative to the expansion sleeve.
3. The automobile part clamping mechanism as claimed in claim 1, wherein the locking unit comprises a friction block, the friction block is movably connected with the overturning unit along a radial direction of the clamping unit, and a second driving unit for driving the friction block to press against and be far away from the clamping unit is arranged on the overturning unit.
4. The auto parts pick up mechanism as claimed in claim 3, wherein a linkage mechanism is provided between the positioning unit and the locking unit, the linkage mechanism being configured to drive the positioning unit to be removed from the side wall of the piston rod when the second driving unit drives the friction block to press the pick up unit.
5. The automobile part clamping mechanism as claimed in claim 4, wherein the positioning unit comprises a positioning rod fixedly connected to a swing arm, and the swing arm is rotatably connected to the turning unit.
6. The automobile part clamping mechanism as claimed in claim 5, wherein the second driving mechanism comprises a cam rotatably connected with the overturning unit, a wheel surface of the cam abuts against the friction block, an elastic unit is arranged between the friction block and the overturning unit, and the elastic unit is assembled in a way that the elastic force acting on the friction block is opposite to the pressure direction acting on the friction block by the cam; the linkage mechanism is assembled to drive the swing arm to rotate in the process that the cam pushes the friction block to a pressing state and continues to rotate.
7. The automobile part clamping mechanism as claimed in claim 6, wherein the linkage mechanism comprises a first sheave and a swing link fixedly connected to a rotating shaft of the cam, and a second sheave fixedly connected to a rotating shaft of the swing arm, an arc groove having a diameter identical to that of the first sheave is provided at an edge of the second sheave, a groove radially provided along the second sheave is provided at one end of the arc groove, a guide pin is provided at an end of the swing link, the guide pin can be engaged with the groove during swing of the swing link, and an avoidance groove for avoiding the second sheave is provided at a position on the first sheave corresponding to the guide pin.
8. The auto parts picking mechanism as claimed in claim 2, wherein the first driving unit is a cylinder or an electric cylinder, and the telescopic rod is connected to an output portion of the cylinder or the electric cylinder.
9. The auto parts picking mechanism as claimed in claim 6, wherein the second driving unit further comprises a servo motor, and the rotating shaft of the cam is connected to an output shaft of the servo motor.
10. The auto parts pick up mechanism of claim 6, wherein the friction block is slidably connected to a guide sleeve provided on the tilting unit through a guide rod, and the elastic unit is a compression spring provided between the guide sleeve and the friction block.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211170753.8A CN115464555A (en) | 2022-09-23 | 2022-09-23 | Automobile part clamping mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211170753.8A CN115464555A (en) | 2022-09-23 | 2022-09-23 | Automobile part clamping mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115464555A true CN115464555A (en) | 2022-12-13 |
Family
ID=84334288
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211170753.8A Withdrawn CN115464555A (en) | 2022-09-23 | 2022-09-23 | Automobile part clamping mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115464555A (en) |
-
2022
- 2022-09-23 CN CN202211170753.8A patent/CN115464555A/en not_active Withdrawn
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| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20221213 |