阅读说明：本技术 一种差压式气动夹钳 (Differential pressure type pneumatic clamp ) 是由 喻荣山 常勇 于 2020-07-20 设计创作，主要内容包括：本发明公开了一种差压式气动夹钳,涉及气动夹具领域。该方案包括钳体、第一夹爪、第二夹爪、齿轮齿条传动组件,所述齿轮齿条传动组件带动第一夹爪、第二夹爪相向移动或相背移动,还包括差压式气动伸缩缸,差压式气动伸缩缸的缸体与所述钳体固定,所述输出端与所述第一夹爪连接或第二夹爪连接,所述输出端的移动方向与所述第一夹爪或所述第二夹爪的移动方向平行。该差压式气动伸缩缸能输出不同大小的力,从而是的气动夹钳能输出不同大小的夹持力,因此,能针对不同刚度的待夹持件使用不同的夹紧力进行夹持,减少因夹持力过大而造成夹瘪或者因夹持力过小而造成无法夹紧的情况发生,提高夹持的稳定性以及可靠性,适用性强。(The invention discloses a differential pressure type pneumatic clamp, and relates to the field of pneumatic clamps. This scheme includes the pincers body, first clamping jaw, second clamping jaw, rack and pinion transmission subassembly drives first clamping jaw, second clamping jaw and removes or carry on the back mutually in opposite directions, still includes the pneumatic telescoping cylinder of differential pressure formula, the cylinder body of the pneumatic telescoping cylinder of differential pressure formula with the pincers body is fixed, the output with first clamping jaw is connected or the second clamping jaw is connected, the moving direction of output with first clamping jaw or the moving direction of second clamping jaw is parallel. This pneumatic telescoping cylinder of differential pressure formula can output not equidimension power to pneumatic clamp can output not equidimension clamping-force, consequently, can use different clamp force to the holder of treating of different rigidity to carry out the centre gripping, reduces because of the too big situation emergence that causes the clamp shrivelled or cause unable clamp tightly because of the clamping-force undersize of clamping-force that causes of clamping-force, improves the stability and the reliability of centre gripping, and the suitability is strong.)

1. The differential pressure type pneumatic clamp comprises a clamp body (1201), a first clamping jaw (1202), a second clamping jaw (1203), a gear and rack transmission assembly (1204), wherein the gear and rack transmission assembly (1204) drives the first clamping jaw (1202) and the second clamping jaw (1203) to move oppositely or back to back, and the differential pressure type pneumatic clamp is characterized by further comprising a differential pressure type pneumatic telescopic cylinder (1), wherein the differential pressure type pneumatic telescopic cylinder (1) comprises a cylinder body (101), a piston (102) and a piston rod (103) connected with the piston (102), the piston rod (103) comprises a primary telescopic rod (1031) and a secondary telescopic rod (1032), and the piston (102) comprises a first plug body (1021) and a second plug body (1022) which are respectively connected with the primary telescopic rod (1031) and the secondary telescopic rod (1032); a primary sliding cavity (1011) is arranged in the cylinder body (101), a secondary sliding cavity (10311) is arranged in the primary telescopic rod (1031), primary vent holes (2) are formed in the primary sliding cavity (1011) on two sides of a piston (102) of the primary telescopic rod (1031) in pairs, and secondary vent holes (3) are formed in the secondary sliding cavity (10311) on two sides of the piston (102) of the secondary telescopic rod (1032) in pairs;

one end of the secondary telescopic rod (1032) is an output end (10321);

the cylinder body (101) is fixed with the clamp body (1201), the output end (10321) is connected with the first clamping jaw (1202) or the second clamping jaw (1203), and the moving direction of the output end (10321) is parallel to the moving direction of the first clamping jaw (1202) or the second clamping jaw (1203).

2. The differential pressure type pneumatic clamp according to claim 1, wherein the primary vent hole (2) comprises a first vent hole (201) and a second vent hole (202), the first vent hole (201) and the second vent hole (202) are both arranged on the cylinder body (101) and are respectively positioned at two sides of the first plug body (1021);

the secondary vent hole (3) comprises a third vent hole (301) and a fourth vent hole (302), the third vent hole (301) is formed in the first-stage telescopic rod (1031), the fourth vent hole (302) is formed in the secondary telescopic rod (1032), and the third vent hole (301) and the fourth vent hole (302) are respectively located on two sides of the second plug body (1022).

3. The differential pressure pneumatic clamp according to claim 2, wherein a side of the first plug body (1021) facing away from the output end (10321) is a first advancing surface (10211), a side of the first plug body (1021) facing the output end (10321) is a first retreating surface (10212), the first vent hole (201) is located on a side of the first advancing surface (10211), and the second vent hole (202) is located on a side of the first retreating surface (10212);

one side of the second cock body (1022) departing from the output end (10321) is a second pushing surface (10221), one side of the second cock body (1022) facing the output end (10321) is a second retreating surface (10222), the third vent hole (301) is located on one side of the second pushing surface (10221), and the fourth vent hole (302) is located on one side of the second retreating surface (10222).

4. The differential pressure type pneumatic clamp as claimed in claim 3, wherein the first vent hole (201), the second vent hole (202), the third vent hole (301) and the fourth vent hole (302) are respectively connected with a first vent pipe (2011), a second vent pipe (2021), a third vent pipe (3011) and a fourth vent pipe (3021), the first vent pipe (2011) and the second vent pipe (2021) are connected with a first on-off solenoid valve (4), the first on-off solenoid valve (4) is connected with a first air inlet pipe (5), the second vent pipe (2021) is further connected with a first back pressure valve (6) and a first exhaust valve (7), the third vent pipe (3011) and the fourth vent pipe (3021) are connected with a second on-off solenoid valve (8), and the second on-off solenoid valve (8) is connected with a second air inlet pipe (9), the third air through pipe (3011) is also connected with a second backpressure valve (10) and a second exhaust valve (11).

5. The differential pressure type pneumatic clamp as claimed in claim 3, wherein the first vent hole (201), the second vent hole (202), the third vent hole (301) and the fourth vent hole (302) are respectively connected with a first vent pipe (2011), a second vent pipe (2021), a third vent pipe (3011) and a fourth vent pipe (3021), the first vent pipe (2011) and the second vent pipe (2021) are connected with a first on-off solenoid valve (4), the first on-off solenoid valve (4) is connected with a first air inlet pipe (5), the first vent pipe (2011) is further connected with a first back pressure valve (6) and a first exhaust valve (7), the third vent pipe (3011) and the fourth vent pipe (3021) are connected with a second on-off solenoid valve (8), and the second on-off solenoid valve (8) is connected with a second air inlet pipe (9), the fourth air pipe (3021) is further connected with a second backpressure valve (10) and a second exhaust valve (11).

6. The differential pressure type pneumatic clamp as claimed in claim 4 or 5, wherein a first pressure reducing valve (501) and a second pressure reducing valve (901) are respectively arranged on the first air inlet pipe (5) and the second air inlet pipe (9), and a first air pressure gauge (5011) and a second air pressure gauge (9011) are respectively connected to the first pressure reducing valve (501) and the second pressure reducing valve (901).

7. The differential pressure pneumatic clamp according to claim 4 or 5, wherein a third barometer (601) and a fourth barometer (1001) are connected to the air inlet ends of the first backpressure valve (6) and the second backpressure valve (10), respectively.

8. The differential pneumatic pliers according to any one of claims 1 to 5, wherein the rack and pinion assembly (1204) comprises two driving gears (12041) and two driving racks (12042), the two driving racks (12042) are respectively located on two sides of the driving gears (12041), the driving gears (12041) are rotatably arranged on the pliers body (1201), the two driving racks (12042) are respectively fixed to the first clamping jaw (1202) and the second clamping jaw (1203), and the output end (10321) is connected to the second clamping jaw (1203).

9. The differential pressure type pneumatic clamp according to any one of claims 1 to 5, wherein a moving guide rail (13) is further arranged on the clamp body (1201), the moving guide rail (13) is arranged along the moving direction of the first clamping jaw (1202) and the second clamping jaw (1203), a sliding block (1301) is respectively connected to the first clamping jaw (1202) and the second clamping jaw (1203), and the sliding block (1301) slides along the moving guide rail (13).

10. The differential pressure pneumatic clamp of claim 9, wherein the first clamping jaw and the second clamping jaw are provided with clamping cushion blocks, and the clamping cushion blocks are respectively positioned on the opposite surfaces of the first clamping jaw and the second clamping jaw.

Technical Field

The invention relates to the field of pneumatic clamps, in particular to a differential pressure type pneumatic clamp.

Background

In the field of machining, there are various kinds of clamping tools, of which a pneumatic clamp is one.

In the field of laser cutting, chucks and manipulators are common clamping tools, and for example, in the existing published patent, chinese patent application with application number "201910864876.3" discloses a "manipulator", which comprises an upper clamp 5.9 and a lower clamp 5.8, wherein the upper clamp 5.9 and the lower clamp 5.8 both comprise a clamping block and a clamping rack, the upper clamp 5.9 and the lower clamp 5.8 are arranged oppositely, a clamping motor drives a clamping gear to rotate, and then the clamping gear drives the clamping rack to move, so that the upper clamp and the lower clamp are driven to move oppositely or move back to back.

Although the mode of driving the clamping jaws to move by the motor is simple in structure and convenient to control, the clamping force is uncontrollable, the clamping force provided by the clamping members to be clamped with different sizes and rigidity is constant, and the clamping force cannot be adjusted according to the condition of the clamping members to be clamped, so that the clamping members to be clamped are possibly shriveled for the clamping members to be clamped with lower rigidity, and the clamping force possibly provided by the clamping members to be clamped with higher weight and size is insufficient, so that the clamping is unstable or even falls off in the transferring or machining process to cause machining safety accidents.

Therefore, in view of the problems in the prior art, it is desirable to provide a clamping device capable of outputting different clamping forces to meet the requirements of the actual production process.

Disclosure of Invention

In order to solve the technical problems, the invention aims to provide a differential pressure type pneumatic clamp, which comprises a differential pressure type pneumatic telescopic cylinder, can output clamping forces with different sizes, is suitable for clamping working conditions of pieces to be clamped with different rigidities, and has the advantages of reliable and stable clamping and wide applicability.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows:

a differential pressure type pneumatic clamp comprises a clamp body, a first clamping jaw, a second clamping jaw, a gear rack transmission assembly and a differential pressure type pneumatic telescopic cylinder, wherein the gear rack transmission assembly drives the first clamping jaw and the second clamping jaw to move in opposite directions or move back to back; a primary sliding cavity is arranged in the cylinder body, a secondary sliding cavity is arranged in the primary telescopic rod, primary vent holes are formed in the primary sliding cavity on two sides of a piston of the primary telescopic rod in pairs, and secondary vent holes are formed in the secondary sliding cavity on two sides of the piston of the secondary telescopic rod in pairs;

one end of the secondary telescopic rod is an output end;

the cylinder body with the pincers body is fixed, the output with first clamping jaw is connected or the second clamping jaw is connected, the moving direction of output with first clamping jaw or the moving direction of second clamping jaw is parallel.

Through the arrangement, the differential pressure type telescopic cylinder is adopted, the primary vent holes are arranged in pairs at two sides of the piston of the primary telescopic rod, so that the air pressure introduced into the primary vent holes at two sides of the piston of the primary telescopic rod can be changed, and the position of the primary telescopic rod and the output force of the primary telescopic rod can be adjusted; similarly, the secondary vent holes are arranged in pairs on two sides of the piston of the secondary telescopic rod, the air pressure introduced into the secondary vent holes on two sides of the piston of the secondary telescopic rod can be changed, so that the position of the secondary telescopic rod and the output force of the secondary telescopic rod can be adjusted, the secondary telescopic rod can move independently, the secondary telescopic rod as the final output power can move independently, the output is adjustable and smaller, when larger force needs to be output, the primary telescopic rod is driven to drive the secondary telescopic rod to move, so that different forces are output, the secondary telescopic rod drives the first clamping jaw (or the second clamping jaw) to move, the gear rack transmission assembly drives the second clamping jaw (or the first clamping jaw) to move, and as the output force of the differential pressure type pneumatic telescopic cylinder is adjustable, the clamping force between the upper clamping jaw and the lower clamping jaw is adjustable, so that workpieces with different rigidities can be stabilized, Reliable clamping and wide applicability.

Preferably, the primary vent hole comprises a first vent hole and a second vent hole, and the first vent hole and the second vent hole are both arranged on the cylinder body and are respectively located on two sides of the first plug body;

the secondary vent hole comprises a third vent hole and a fourth vent hole, the third vent hole is formed in the first-stage telescopic rod, the fourth vent hole is formed in the secondary telescopic rod, and the third vent hole and the fourth vent hole are located on two sides of the second plug body respectively.

Through the arrangement, the third through hole is arranged on the first-stage telescopic rod, and the fourth through hole is arranged on the secondary telescopic rod, so that the size of the first-stage telescopic rod is favorably reduced, and the size of the whole pneumatic telescopic cylinder is further reduced; in addition, the processing difficulty is favorably reduced, and the production is convenient.

Preferably, one side of the first plug body, which is far away from the output end, is a first pushing surface, one side of the first plug body, which is far towards the output end, is a first retreating surface, the first vent hole is located at one side of the first pushing surface, and the second vent hole is located at one side of the first retreating surface;

the second cock body deviates from one side of output is the second and impels the face, the second cock body court one side of output is the second back face, the third ventilation hole is located one side of second propulsion face, the fourth ventilation hole is located one side of second back face.

Through the arrangement, the secondary telescopic rod and the primary telescopic rod can move independently, when only small output force is needed, only the secondary telescopic rod can be driven to move, or the air pressure difference is formed between two sides of a piston of the secondary telescopic rod, and small force is output; when large output force needs to be output, the primary telescopic rod is adopted to push the secondary telescopic rod to move, and large output force is obtained, so that the use requirement of large output force is met.

Preferably, be connected with first breather pipe, second breather pipe, third breather pipe, fourth breather pipe on first breather pipe, second breather pipe, third breather pipe and the fourth breather pipe respectively, first breather pipe second breather pipe is connected on first switching solenoid valve, first switching solenoid valve and first intake-tube connection, the second breather pipe still is connected with first back pressure valve and first discharge valve, the third breather pipe fourth breather pipe is connected on second switching solenoid valve, second switching solenoid valve and second intake-tube connection, the third breather pipe still is connected with second back pressure valve and second discharge valve.

Through the arrangement, the first air inlet pipe is ventilated to serve as driving air pressure of the first-stage telescopic rod, the first air vent pipe or the second air vent pipe is ventilated through the first switching electromagnetic valve, back pressure can be adjusted through the first back pressure valve, so that the output force of the first-stage telescopic rod is adjusted, and when the first-stage telescopic rod needs to be driven to move forwards, the first exhaust valve is opened to exhaust air;

and the second air inlet pipe is ventilated to serve as the driving air pressure of the secondary telescopic rod, the third air inlet pipe or the fourth air inlet pipe is ventilated through the second switching electromagnetic valve, the back pressure can be adjusted through the second back pressure valve, so that the output force of the secondary telescopic rod is adjusted, and when the secondary telescopic rod needs to be driven to contract, the second exhaust valve is opened through the second switching electromagnetic valve to exhaust.

As preferred, be connected with first breather pipe, second breather pipe, third breather pipe, fourth breather pipe on first breather pipe, second breather pipe, third breather pipe and the fourth breather pipe respectively, first breather pipe second breather pipe is connected on first switching solenoid valve, first switching solenoid valve and first intake-tube connection, first breather pipe still is connected with first back pressure valve and first discharge valve, the third breather pipe fourth breather pipe is connected on second switching solenoid valve, second switching solenoid valve and second intake-tube connection, the fourth breather pipe still is connected with second back pressure valve and second discharge valve.

Through the arrangement, the arrangement mode is suitable for the situation that the clamping jaw is driven to realize clamping action when the output end extends out, the first air inlet pipe is ventilated to serve as the driving air pressure of the first-stage telescopic rod, the first air vent pipe or the second air vent pipe is switched to be ventilated through the first switch electromagnetic valve, the back pressure can be adjusted through the first back pressure valve, so that the output force of the first-stage telescopic rod is adjusted, and when the first-stage telescopic rod needs to be driven to retract, the first exhaust valve can be opened to exhaust;

and the second air inlet pipe is ventilated to serve as the driving air pressure of the secondary telescopic rod, the third air inlet pipe or the fourth air inlet pipe is switched to be ventilated through the second switching electromagnetic valve, the back pressure can be adjusted through the second back pressure valve, so that the output force of the secondary telescopic rod is adjusted, and when the secondary telescopic rod needs to be driven to move forwards, the second exhaust valve is opened to exhaust.

Preferably, the first air inlet pipe and the second air inlet pipe are respectively provided with a first pressure reducing valve and a second pressure reducing valve, and the first pressure reducing valve and the second pressure reducing valve are respectively connected with a first air gauge and a second air gauge.

Through setting up like this, adjust the atmospheric pressure of exporting to first intake pipe, second intake pipe respectively through first relief pressure valve, second relief pressure valve, set up first barometer and second barometer, be convenient for adjust corresponding atmospheric pressure value.

Preferably, the air inlet ends of the first back pressure valve and the second back pressure valve are respectively connected with a third barometer and a fourth barometer.

Through setting up like this, set up third barometer and fourth barometer, can observe the backpressure value after first backpressure valve and the adjustment of second backpressure valve directly perceivedly, be convenient for adjust the output of telescoping cylinder, and then the clamping-force of adjustment clamp.

Preferably, the gear rack transmission assembly comprises a driving gear and two driving racks, the two driving racks are respectively located on two sides of the driving gear, the driving gear is rotatably arranged on the clamp body, the two driving racks are respectively fixed to the first clamping jaw and the second clamping jaw, and the output end of the gear rack is connected with the second clamping jaw.

Through setting up like this, the output drives the second clamping jaw and removes, and is connected with the drive rack on the second clamping jaw, drives drive gear through this drive rack and rotates, and then drives another drive rack that is located the drive gear opposite side and remove, reaches to make first clamping jaw remove in opposite directions towards the second clamping jaw or deviate from the second clamping jaw back of the body and remove.

Preferably, the clamp body is further provided with a moving guide rail, the moving guide rail is arranged along the moving direction of the first clamping jaw and the second clamping jaw, the first clamping jaw and the second clamping jaw are respectively connected with a sliding block, and the sliding block slides along the moving guide rail.

Through setting up like this, set up the slider and slide along moving guide rail, make the removal of first clamping jaw and second clamping jaw more smooth and easy, stable.

Preferably, the first clamping jaw and the second clamping jaw are both provided with clamping cushion blocks, and the clamping cushion blocks are respectively positioned on the opposite surfaces of the first clamping jaw and the second clamping jaw.

Through setting up like this, set up the centre gripping cushion on first clamping jaw and second clamping jaw, when the holder is treated in the centre gripping, the contact of centre gripping cushion buffering and treating the holder reduces the possibility of treating the holder damage.

Compared with the prior art, the invention has the beneficial technical effects that:

the utility model provides a differential pressure formula pneumatic clamp, including the pneumatic telescoping cylinder of output power adjustable differential pressure formula, the pneumatic telescoping cylinder of this differential pressure formula can export the not power of equidimension, thereby pneumatic clamp can export the not clamping-force of equidimension, consequently, can use different clamp force to the holder of treating of different rigidity to carry out the centre gripping, reduce because of the too big clamp force that causes the clamp shrivelled or cause the unable circumstances of pressing from both sides tightly to take place because of the clamping-force undersize, improve the stability and the reliability of centre gripping, the suitability is strong.

Drawings

FIG. 1 is a schematic structural view of a differential pressure type pneumatic telescoping cylinder in embodiment 1 of the present invention;

FIG. 2 is a schematic view of the inside of a differential pressure type pneumatic telescoping cylinder in embodiment 1 of the present invention;

fig. 3 is a schematic view of the air path connection of the differential pressure type pneumatic telescopic cylinder in embodiment 1 of the present invention;

FIG. 4 is a schematic view of the inside of a differential pressure type pneumatic telescoping cylinder in embodiment 2 of the present invention;

FIG. 5 is a schematic view showing the overall structure of the differential pressure type pneumatic clamp in embodiment 3 of the present invention;

FIG. 6 is a front view of the differential pressure type pneumatic clamp in embodiment 3 of the invention;

FIG. 7 is a rear view of the differential pressure type pneumatic clamp in embodiment 3 of the invention;

FIG. 8 is a schematic view of a first ventilation state and force analysis of a differential pressure type pneumatic telescopic cylinder in working condition one according to embodiment 4 of the present invention;

FIG. 9 is a schematic view of a second ventilation state and force analysis of the differential pressure type pneumatic telescopic cylinder in the working condition one according to the embodiment 4 of the present invention;

fig. 10 is a schematic view of analysis of the ventilation state and the stress of the differential pressure type pneumatic telescopic cylinder in the second working condition according to the embodiment 4 of the present invention;

fig. 11 is a schematic view of a first ventilation state and a force analysis of a differential pressure type pneumatic telescopic cylinder in a third working condition according to embodiment 4 of the present invention;

fig. 12 is a schematic view of a second ventilation state and a force analysis of the differential pressure type pneumatic telescopic cylinder in the third operating mode according to embodiment 4 of the present invention;

fig. 13 is a schematic view of a third ventilation state and a force analysis of the differential pressure type pneumatic telescopic cylinder in the third operating mode in embodiment 4 of the present invention;

fig. 14 is a schematic view of the air path connection of the differential pressure type pneumatic telescoping cylinder in embodiment 6 of the present invention.

Wherein, the technical characteristics that each reference numeral refers to are as follows:

1. a differential pressure type pneumatic telescopic cylinder; 101. a cylinder body; 1011. a primary slide cavity; 102. a piston; 1021. a first plug body; 10211. a first pusher surface; 10212. a first receding surface; 1022. a second plug body; 10221. a second pusher surface; 10222. a second receding surface; 103. a piston rod; 1031. a first-stage telescopic rod; 10311. a secondary slide cavity; 1032. a secondary telescopic rod; 10321, an output end; 103211, a connecting nut; 2. a primary vent; 201. a first vent hole; 2011. a first vent pipe; 202. a second vent hole; 2021. a second vent pipe; 20211. a one-way valve; 3. a secondary vent; 301. a third vent hole; 3011. a third vent pipe; 302. a fourth vent hole; 3021. a fourth air vent pipe; 4. a first on-off solenoid valve; 5. a first intake pipe; 501. a first pressure reducing valve; 5011. a first barometer; 6. a first back pressure valve; 601. a third barometer; 7. a first exhaust valve; 8. a second on-off solenoid valve; 9. a second intake pipe; 901. a second pressure reducing valve; 9011. a second barometer; 10. a second back pressure valve; 1001. a fourth barometer; 11. a second exhaust valve; 12. differential pressure type pneumatic clamp; 1201. A clamp body; 1202. a first jaw; 1203. a second jaw; 12031. a connecting plate; 120311, a connecting card slot; 1204. a rack and pinion drive assembly; 12041. a drive gear; 12042. a drive rack; 13. a moving guide rail; 1301. a slider; 14. And clamping the cushion block.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments, but the scope of the present invention is not limited to the following embodiments.