CN217223291U

CN217223291U - Clamping jaw sleeve pushing device

Info

Publication number: CN217223291U
Application number: CN202121453680.4U
Authority: CN
Inventors: 李伟斌; 陈荣荣
Original assignee: Jdm Jingda Machine Ningbo Co ltd
Current assignee: Jdm Jingda Machine Ningbo Co ltd
Priority date: 2021-06-29
Filing date: 2021-06-29
Publication date: 2022-08-19
Anticipated expiration: 2031-06-29

Abstract

A clamping jaw sleeve pushing device comprises a clamping jaw cross beam, a clamping jaw sleeve mounting cross beam, a plurality of groups of clamping jaw sleeves and air cylinder assemblies, wherein each clamping jaw sleeve is mounted on the clamping jaw sleeve mounting cross beam and is sleeved outside each clamping jaw in a penetrating mode, each air cylinder assembly is mounted on the clamping jaw cross beam, a piston rod of each air cylinder assembly is connected with the clamping jaw sleeve mounting cross beam, and the air cylinder assembly air cylinder piston rod stretches to drive the clamping jaw sleeve mounting cross beam and the clamping jaw sleeves mounted on the clamping jaw sleeve to move up and down so that clamping jaws can be opened or closed. The utility model has the advantages that: all cylinder assemblies are independently installed on the clamping jaw cross beam, so only the cylinder assembly with problems needs to be disassembled and assembled, the disassembly and the maintenance are very convenient, and the maintenance cost is reduced. Moreover, the cylinder assembly has a boosting function, and output force is guaranteed.

Description

Clamping jaw sleeve pushing device

Technical Field

The utility model relates to a clamping jaw cover thrust unit.

Background

When the tube expander expands the tube, the straight tube end and the U tube end of the U-shaped tube need to be clamped, so that the micro-shrinkage tube expansion is realized, and the purpose of saving raw materials is achieved. The straight pipe end clamping of the U-shaped pipe is mainly realized by controlling the opening and closing of the clamping jaw 2 shown in figure 1, the clamping jaw 2 is externally sleeved with the clamping jaw sleeve 3, the clamping jaw sleeve 3 is moved through a hydraulic system to control the opening and closing of the clamping jaw 2, so that the clamping or loosening of the straight pipe end is realized, and the hydraulic system has the hidden trouble of oil leakage to influence the field operation environment, so that the clamping is rarely adopted at present. In a clamping jaw clamping device of a pipe expander in Chinese patent ZL201721216836.0, a pneumatic system is introduced to realize the movement of a clamping jaw sleeve 2, but all cylinder bodies of cylinders are integrated on a clamping jaw beam, so that once one cylinder has an air leakage problem, the whole clamping device needs to be detached for maintenance, the engineering quantity is large, and the maintenance cost is high. Moreover, the maximum output force of the cylinder in the whole movement process is constant, and the output requirement of larger force required for controlling the clamping jaw 2 to be closed with the copper pipe at the end of the straight pipe cannot be met, but the installation size is obviously unrealistic if the cylinder diameter is increased.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that overcome prior art's above-mentioned defect and provide a clamping jaw cover thrust unit, its easy maintenance.

The utility model provides a technical scheme that above-mentioned technical problem adopted does:

a clamping jaw sleeve pushing device comprises a clamping jaw cross beam, a clamping jaw sleeve mounting cross beam, a plurality of groups of clamping jaw sleeves and air cylinder assemblies, wherein each clamping jaw sleeve is mounted on the clamping jaw sleeve mounting cross beam and is sleeved outside each clamping jaw in a penetrating mode, each air cylinder assembly is mounted on the clamping jaw cross beam, a piston rod of each air cylinder assembly is connected with the clamping jaw sleeve mounting cross beam, and the air cylinder assembly air cylinder piston rod stretches to drive the clamping jaw sleeve mounting cross beam and the clamping jaw sleeves mounted on the clamping jaw sleeve to move up and down so that clamping jaws can be opened or closed.

Preferably, the cylinder assembly comprises an upper cylinder body, a lower cylinder body, a piston and a piston rod, wherein a piston cavity is formed in the upper cylinder body, the piston is arranged in the piston cavity, one end of the piston rod is in threaded connection with the piston, the other end of the piston rod is connected with the claw sleeve mounting cross beam, and the upper cylinder body and the lower cylinder body are detachably connected together, so that the cylinder assembly is convenient to mount.

Preferably, the other end of the piston rod is connected with the claw sleeve mounting beam through a force increasing mechanism, so that the acting force of the cylinder on the claw sleeve can be increased, and the claw sleeve can be more easily matched with the clamp to clamp a workpiece.

Preferably, the force-increasing mechanism comprises a force-increasing sleeve, a push rod and an output rod, wherein the push rod is hollow, the upper part of a cavity is provided with a limiting step, the lower part of the cavity is provided with a first downward inclined surface, the limiting block is arranged at one end of the output rod, the limiting step of the push rod can be abutted against the limiting block to limit when the push rod moves upwards, the other end of the piston rod is connected with the push rod, the other end of the output rod is connected with a clamping jaw sleeve beam, the force-increasing sleeve is sleeved on the push rod, the lower end of the force-increasing sleeve is provided with a second downward inclined surface opposite to the first downward inclined surface, and a force-increasing ball is arranged in a space between the first downward inclined surface and the inner wall of the force-increasing sleeve and is supported by an output rod supporting part; the output rod is arranged on the output rod, the output rod is connected with the output rod, the output rod is arranged on the output rod, and the output rod is connected with the output rod.

Preferably, the locking mechanism comprises a through groove which is arranged on the peripheral wall of the push rod and can accommodate the locking boosting ball, a locking groove which is matched with the locking boosting ball is arranged on the periphery of the output rod, and when the locking steel ball is arranged in the through groove, the outer side of the locking boosting ball can be embedded into the locking groove, so that the output rod and the push rod are locked by the locking boosting ball and cannot move relatively.

Preferably, the unlocking mechanism comprises an unlocking groove arranged on the inner wall of the force increasing sleeve, when the force increasing ball in the push rod through groove moves to the unlocking groove along with the push rod and the output rod, and the outer side of the force increasing ball moves to the unlocking groove, the inner side of the force increasing ball is separated from the locking groove of the output rod, so that the push rod and the output rod can be separated, and the push rod can continuously move downwards relative to the output rod under the pushing of the claw sleeve mounting beam.

Preferably, the force increasing sleeve is positioned between the inner side of the lower cylinder body and the outer side of the push rod, so that the structure of the lower cylinder body can be fully utilized as a supporting body of the force increasing sleeve, and the structure is simplified.

Preferably, the first downward inclined surface is a conical surface, and the second downward inclined surface is a conical surface, so that the force increasing ball can apply force downwards more easily.

Preferably, the other end of the piston rod is in threaded connection with the push rod, so that the piston rod and the push rod are convenient to detach and mount.

Preferably, a force ball retainer is also provided, which is fitted over the output shaft, so that the force ball can be better seated and guided.

More specifically, the force-increasing ball is a steel ball.

Compared with the prior art, the utility model has the advantages of: all cylinder assemblies are independently installed on the clamping jaw cross beam, so only the cylinder assembly with problems needs to be disassembled and assembled, the disassembly and the maintenance are very convenient, and the maintenance cost is reduced. Moreover, the air cylinder assembly has a boosting function, and output force is guaranteed.

Drawings

Fig. 1 is a front view of the clamping jaw sleeve pushing device of the present invention.

Fig. 2 is a side view of fig. 1.

Fig. 3 is a cross-sectional view of the cylinder assembly of the jaw cover pushing device of the present invention.

Fig. 4 is a cross-sectional view of another state of the cylinder assembly of the jaw housing pushing device of the present invention.

Fig. 5 is an enlarged view of the lower portion of the cylinder assembly of fig. 4.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments.

As shown in fig. 1-5, a clamping jaw sleeve pushing device comprises a clamping jaw beam 1, a clamping jaw sleeve mounting beam 4, a plurality of groups of clamping jaws 2, a clamping jaw sleeve 3 and an air cylinder assembly 5.

Each clamping jaw 2 is arranged on a clamping jaw beam 1, each clamping jaw sleeve 3 is arranged on a clamping jaw sleeve mounting beam 4 and is sleeved outside each clamping jaw 2 in a penetrating manner, each air cylinder assembly 5 is arranged on the clamping jaw beam 1, an air cylinder piston rod of each air cylinder assembly is connected with the clamping jaw sleeve mounting beam 4, and the air cylinder piston rod of each air cylinder assembly 5 stretches out and draws back to drive the clamping jaw sleeve mounting beam 4 and the clamping jaw sleeve 3 arranged on the clamping jaw sleeve mounting beam to move up and down so as to open or close the clamping jaw 2.

As shown in fig. 3, the cylinder assembly 5 includes an upper cylinder 501, a piston 502, a piston rod 503, a stopper 504, a connecting screw 505, a force increasing steel ball 506, an oilless bearing 507, an output rod 508, a force increasing steel ball holder 509, a locking steel ball 510, a push rod 511, a force increasing sleeve 512, and a lower cylinder 513.

The upper cylinder body 501 and the lower cylinder body 513 are installed together to form a cylinder whole and are installed on the clamping jaw beam 1 through the lower cylinder body 513, the upper cylinder body 501 is provided with a cylinder cavity, the piston 502 is located in the cylinder cavity, one end 5031 of the piston rod 503 is in threaded connection with the piston 502, and the other end 5032 of the piston rod 503 is in threaded connection with the upper end of the push rod 511.

The push rod 511 is hollow, the upper portion of the cavity is provided with a limiting step 5111, the middle portion of the cavity is provided with an accommodating groove 5113, the lower portion of the cavity is provided with a first downward inclined surface 5112 from the outer wall to the inner wall, and the limiting block 504 is mounted at one end of the output rod 508 through a connecting screw 505, so that the limiting step 5111 of the push rod 511 can abut against the limiting block 504 to limit when moving upwards.

The other end of the output rod 508 is connected with the jaw sleeve beam 4, so that the output rod 508 can drive the jaw sleeve beam 4 to move, and further drive the jaw sleeve 3 installed on the jaw sleeve beam 4 to move, so that the jaw 2 is opened or closed.

The push rod 511 and the output rod 508 are further provided with a locking mechanism, in the embodiment, the outer peripheral wall of the push rod 511 is provided with a through groove 5113 capable of containing a locking steel ball 510, the outer periphery of the output rod 508 is provided with a groove 5081 matched with the locking steel ball 510, when the locking steel ball 510 is placed in the through groove 5113, the locking steel ball 510 is exposed out of the through groove 5113 and can be embedded into the groove 5081, and thus the output rod 508 and the push rod 511 are locked by the locking steel ball 510 and cannot move relatively.

The force increasing sleeve 512 is positioned between the inner side of the lower cylinder body 513 and the outer side of the push rod 511, an unlocking mechanism is arranged between the force increasing sleeve 512 and the push rod 511, in the embodiment, an unlocking groove 5121 is formed in the inner wall of the force increasing sleeve 512, a second downward inclined surface 5122 from the inner wall to the outer wall is further arranged at the end part of the inner wall, and the force increasing steel ball 506 is arranged in the force increasing steel ball retainer 509, is arranged in a space between the first downward inclined surface and the inner wall of the force increasing sleeve and is supported by a protruding part 5083 of the output rod 508.

The oilless bearing 507 is fixed in the lower cylinder body 513 and is sleeved outside the output rod 508 in a penetrating manner, so that the phenomenon of cylinder body abrasion caused by direct contact of the output rod 508 and the lower cylinder body 513 is avoided.

When the rodless cavity of the upper cylinder body 501 is filled with air, the piston 502 moves downwards and drives the push rod 511 to move downwards through the piston rod 503, and as the locking steel ball 510 is positioned in the locking groove 5081, the push rod 511 is locked with the output rod 508, the push rod 511 drives the output rod 508 and the clamping jaw sleeve beam 4 to move downwards together, and the clamping jaw sleeve 3 also moves downwards along with the output rod.

When the push rod 511 goes down to the unlocking groove 5121 of the force increasing sleeve 512, the output rod 508 forces the part of the push rod 511 exposed out of the locking steel ball 510 to gradually enter the unlocking groove 5121 from the groove 5081, at this time, the output rod 508 and the push rod 511 are separated due to unlocking, at the same time, the output rod 508 goes down to the point that the protrusion 5083 of the output rod 508 leaves the inner wall of the force increasing sleeve, the force increasing steel ball 506 gradually enters the second downward inclined surface 5122, the force increasing steel ball 506 moves downward and outward under the pushing of the first downward inclined surface 5111, the output rod 508 and the piston 502 and the push rod 511 connected with the output rod 508 are not in accordance with the downward moving speed, the output rod 508 starts to increase force, when the piston 502 goes down to the end stroke, as shown in fig. 4, the clamping jaws 2 close to clamp the straight tube end of the U tube, the force increasing steel ball 506 is acted on by both the second downward inclined surfaces 5122 and the first downward inclined surface 5111, so that the acting force is transmitted to the clamping jaw sleeve 3 through the output rod 508, and maintaining the acting force until the tube expansion is finished.

After the tube expansion is finished, the rod cavity of the piston 502 is inflated, so that the output rod 508 drives the jaw sleeve 3 to move upwards and reset gradually, and the jaw sleeve returns to the initial position, as shown in fig. 3.

Claims

1. A clamping jaw sleeve pushing device is characterized in that: the clamping jaw assembly comprises a clamping jaw cross beam, a clamping jaw sleeve mounting cross beam, a plurality of groups of clamping jaw sleeves and air cylinder assemblies, wherein each clamping jaw sleeve is mounted on the clamping jaw sleeve mounting cross beam and is sleeved outside each clamping jaw in a penetrating manner, each air cylinder assembly is mounted on the clamping jaw cross beam, a piston rod of the air cylinder assembly is connected with the clamping jaw sleeve mounting cross beam, and the telescopic cylinder piston rod of the air cylinder assembly drives the clamping jaw sleeve mounting cross beam and the clamping jaw sleeve mounted on the clamping jaw sleeve to move up and down so that the clamping jaw is opened or closed.

2. The jaw case pusher of claim 1, wherein: the air cylinder assembly comprises an upper cylinder body, a lower cylinder body, a piston and a piston rod, wherein a piston cavity is formed in the upper cylinder body, the piston is arranged in the piston cavity, one end of the piston rod is in threaded connection with the piston, the other end of the piston rod is connected with a claw sleeve mounting cross beam, and the upper cylinder body and the lower cylinder body are detachably connected together.

3. The jaw case pusher of claim 1, wherein: the other end of the piston rod is connected with the claw sleeve mounting beam through a force increasing mechanism.

4. The jaw case pusher of claim 3, wherein: the boosting mechanism comprises a boosting sleeve, a push rod and an output rod, wherein the push rod is hollow, the upper part of a cavity is provided with a limiting step, the lower part of the cavity is provided with a first downward inclined plane, the limiting block is arranged at one end of the output rod, the limiting step of the push rod can be abutted against the limiting block to limit when the push rod moves upwards, the other end of the piston rod is connected with the push rod, the other end of the output rod is connected with a clamping jaw sleeve beam, the boosting sleeve is sleeved on the push rod, the lower end of the boosting sleeve is provided with a second downward inclined plane opposite to the first downward inclined plane, and a boosting ball is arranged in a space between the first downward inclined plane and the inner wall of the boosting sleeve and is supported by an output rod supporting part; the output rod is arranged on the output rod, and the output rod is arranged on the output rod.

5. The jaw case pusher of claim 4, wherein: the locking mechanism comprises a through groove which is formed in the peripheral wall of the push rod and can accommodate the locking boosting ball, a locking groove which is matched with the locking boosting ball is formed in the periphery of the output rod, when the locking boosting ball is arranged in the through groove, the outer side of the locking boosting ball can be embedded into the locking groove, the output rod and the push rod are locked by the locking boosting ball, and the output rod and the push rod cannot move relative to each other.

6. The jaw case pusher of claim 4, wherein: the unlocking mechanism comprises an unlocking groove arranged on the inner wall of the boosting sleeve, when the boosting ball in the through groove of the push rod moves to the unlocking groove along with the push rod and the output rod, and the outer side of the boosting ball moves to the unlocking groove, the inner side of the boosting ball is separated from the locking groove of the output rod, so that the push rod and the output rod can be separated.

7. The jaw case pusher of claim 4, wherein: the boosting sleeve is positioned between the inner side of the lower cylinder body and the outer side of the push rod.

8. The jaw case pusher of claim 4, wherein: the first downward inclined plane is a conical surface, and the second downward inclined plane is a conical surface.

9. The jaw case pusher of claim 4, wherein: the other end of the piston rod is in threaded connection with the push rod, so that the piston rod and the push rod are convenient to detach and mount.

10. The jaw case pusher of claim 4, wherein: and a force increasing ball retainer is also arranged and sleeved outside the output rod.