阅读说明：本技术 双缸双动钻杆夹持器 (Double-cylinder double-acting drill rod holder ) 是由 夏永坤 于海 于志斌 李楠 李贵 于 2020-06-28 设计创作，主要内容包括：一种双缸双动钻杆夹持器,包括底座及相互正对的设置于底座上的左夹持机构和右夹持机构,左夹持机构、右夹持机构均包括缸体、通过前盖螺栓连接于缸体前端的前盖、设置于缸体内的主轴、连接于主轴后端的圆盘状的活塞及位于前盖的中部前侧的夹瓦,缸体内成型有隔套,该隔套将缸体内腔分隔为弹簧腔及位于该弹簧腔后方的活塞腔,弹簧腔与活塞腔通过隔套的中孔连通,主轴穿设于中孔,主轴与中孔的孔壁之间留有间隙,缸体设置有进油孔,该进油孔与弹簧腔连通,主轴于弹簧腔内套设有蝶形弹簧,蝶形弹簧连接于主轴与隔套之间,活塞位于活塞腔内,主轴向前穿过前盖中部的轴孔与夹瓦连接。它结构简单,动作反应快,夹紧力强,不偏心,易于拆装,更便于维护。(A double-cylinder double-acting drill rod holder comprises a base, a left clamping mechanism and a right clamping mechanism which are opposite to each other and arranged on the base, wherein the left clamping mechanism and the right clamping mechanism respectively comprise a cylinder body, a front cover connected to the front end of the cylinder body through a front cover bolt, a main shaft arranged in the cylinder body, a disc-shaped piston connected to the rear end of the main shaft and a clamping tile positioned on the front side of the middle part of the front cover, a spacer bush is formed in the cylinder body, the spacer sleeve divides the inner cavity of the cylinder body into a spring cavity and a piston cavity positioned behind the spring cavity, the spring cavity is communicated with the piston cavity through a middle hole of the spacer sleeve, the main shaft penetrates through the middle hole, a gap is left between the main shaft and the hole wall of the middle hole, the cylinder body is provided with an oil inlet hole, the oil inlet hole is communicated with the spring cavity, the main shaft is sleeved with a belleville spring in the spring cavity, the belleville spring is connected between the main shaft and the spacer sleeve, the piston is located in the piston cavity, and the main shaft forwards penetrates through the shaft hole in the middle of the front cover to be connected with the clamping bush. The novel clamp is simple in structure, fast in action response, strong in clamping force, not eccentric, easy to disassemble and assemble and more convenient to maintain.)

1. A double-cylinder double-acting drill rod holder is characterized in that: the double-cylinder double-acting drill rod holder comprises a base, a left clamping mechanism and a right clamping mechanism which are opposite to each other and arranged on the base, wherein the left clamping mechanism and the right clamping mechanism respectively comprise a cylinder body, a front cover connected to the front end of the cylinder body through a front cover bolt, a main shaft arranged in the cylinder body, a disc-shaped piston connected to the rear end of the main shaft and a clamping tile positioned on the front side of the middle part of the front cover, an annular spacer sleeve is formed in the cylinder body and divides an inner cavity of the cylinder body into a spring cavity and a piston cavity positioned behind the spring cavity, the spring cavity is communicated with the piston cavity through a middle hole of the spacer sleeve, the main shaft penetrates through the middle hole, a gap is reserved between the main shaft and the hole wall of the middle hole, the cylinder body is provided with an oil inlet hole communicated with the spring cavity, and a disc spring is sleeved on the main shaft in the spring cavity, the butterfly spring is connected between the main shaft and the spacer bush, the piston is located in the piston cavity, the piston is in sealing fit with the cylinder body through a piston sealing ring, the main shaft forwards penetrates through a shaft hole in the middle of the front cover to be connected with the clamping tile, the main shaft is in sealing fit with the shaft hole of the front cover through the main shaft sealing ring, and the clamping tile of the left clamping mechanism is opposite to the clamping tile of the right clamping mechanism.

2. The double cylinder double action drill rod holder according to claim 1, characterized in that: and an oil inlet groove is arranged on the front end surface of the spacer bush, right facing the oil inlet hole, and the oil inlet groove extends inwards to the middle hole.

3. The double cylinder double action drill rod holder according to claim 2, characterized in that: the main shaft comprises a main shaft front end part, a main shaft middle part and a main shaft rear end part which are sequentially formed from front to back, the diameter of the main shaft front end part is larger than that of the main shaft middle part, the diameter of the main shaft middle part is larger than that of the main shaft rear end part, a front end step is formed between the main shaft front end part and the main shaft middle part, and the front end of the belleville spring abuts against the front end step.

4. The double cylinder double action drill rod holder according to claim 3, characterized in that: the piston is sleeved on the rear end portion of the main shaft, a rear end step is formed between the middle portion of the main shaft and the rear end portion of the main shaft, the middle portion of the front end of the piston is in contact with the rear end step, the rear end portion of the main shaft penetrates through the piston to be connected with a lock nut, and a piston sealing ring is arranged between the rear end portion of the main shaft and the piston.

5. The double cylinder double action drill rod holder according to claim 4, characterized in that: the outer fringe of protecgulum is provided with round protecgulum flange hole, be provided with the back support ring on the circumference of the rear end of cylinder body, the outer fringe of back support ring is provided with the flange hole of back support ring of round.

6. The double cylinder double action drill rod holder according to claim 5, characterized in that: the base comprises a bottom plate and a plurality of supporting vertical plates arranged on the bottom plate, the front cover is connected with the corresponding supporting vertical plates through the front cover flange holes and the fixing bolts, and the rear supporting ring is connected with the corresponding supporting vertical plates through the rear supporting ring flange holes and the rear supporting ring bolts.

7. The double cylinder double action drill rod holder according to claim 6, characterized in that: a front cover sealing ring is arranged between the front cover and the cylinder body.

8. The double cylinder double action drill rod holder according to claim 7, wherein: the clamping bush is connected with the front end part of the main shaft through a bush clamping bolt.

Technical Field

The invention relates to the technical field of drilling machine equipment, in particular to a double-cylinder double-acting drill rod holder.

Background

The drilling machine is generally provided with a drill rod clamping device for clamping a drilling tool in a hole to prevent the drilling tool in the hole from sliding, and the drilling machine can be matched with a movable tool bit to automatically screw the drill rod when necessary. The clamp is an important part of the drilling machine, and the performance of the clamp can directly influence the performance, the drilling efficiency and the drilling quality of the whole drilling machine.

In coal mine drilling, a manual clamp is commonly used for clamping a drill rod, however, the existing manual clamp usually has slow action response, insufficient clamping force and easy eccentricity in the process of clamping the drill rod. Therefore, a double-cylinder double-acting drill rod holder which is reasonable and simple in structure, fast in action reaction, strong in clamping force, free of eccentricity, easy to disassemble and assemble and convenient to maintain is urgently needed in the prior art.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provides the double-cylinder double-acting drill rod holder which is reasonable and simple in structure, quick in action response, strong in clamping force, free of eccentricity, easy to disassemble and assemble and convenient to maintain.

The invention is realized by the following technical scheme: a double-cylinder double-acting drill rod gripper comprises a base, a left clamping mechanism and a right clamping mechanism which are opposite to each other and arranged on the base, wherein the left clamping mechanism and the right clamping mechanism respectively comprise a cylinder body, a front cover which is connected to the front end of the cylinder body through a front cover bolt, a main shaft which is arranged in the cylinder body, a disc-shaped piston which is connected to the rear end of the main shaft and a clamping tile which is positioned on the front side of the middle part of the front cover, an annular spacer sleeve is formed in the cylinder body and divides an inner cavity of the cylinder body into a spring cavity and a piston cavity which is positioned behind the spring cavity, the spring cavity is communicated with the piston cavity through a middle hole of the spacer sleeve, the main shaft penetrates through the middle hole, a gap is reserved between the main shaft and the hole wall of the middle hole, the cylinder body is provided with an oil inlet which is communicated with the spring cavity, and a disc spring is sleeved, the butterfly spring is connected between the main shaft and the spacer bush, the piston is located in the piston cavity, the piston is in sealing fit with the cylinder body through a piston sealing ring, the main shaft forwards penetrates through a shaft hole in the middle of the front cover to be connected with the clamping tile, the main shaft is in sealing fit with the shaft hole of the front cover through the main shaft sealing ring, and the clamping tile of the left clamping mechanism is opposite to the clamping tile of the right clamping mechanism.

And an oil inlet groove is arranged on the front end surface of the spacer bush, right facing the oil inlet hole, and the oil inlet groove extends inwards to the middle hole.

The main shaft comprises a main shaft front end part, a main shaft middle part and a main shaft rear end part which are sequentially formed from front to back, the diameter of the main shaft front end part is larger than that of the main shaft middle part, the diameter of the main shaft middle part is larger than that of the main shaft rear end part, a front end step is formed between the main shaft front end part and the main shaft middle part, and the front end of the belleville spring abuts against the front end step.

The piston is sleeved on the rear end portion of the main shaft, a rear end step is formed between the middle portion of the main shaft and the rear end portion of the main shaft, the middle portion of the front end of the piston is in contact with the rear end step, the rear end portion of the main shaft penetrates through the piston to be connected with a lock nut, and a piston sealing ring is arranged between the rear end portion of the main shaft and the piston.

The outer fringe of protecgulum is provided with round protecgulum flange hole, be provided with the back support ring on the circumference of the rear end of cylinder body, the outer fringe of back support ring is provided with the flange hole of back support ring of round.

The base comprises a bottom plate and a plurality of supporting vertical plates arranged on the bottom plate, the front cover is connected with the corresponding supporting vertical plates through the front cover flange holes and the fixing bolts, and the rear supporting ring is connected with the corresponding supporting vertical plates through the rear supporting ring flange holes and the rear supporting ring bolts.

A front cover sealing ring is arranged between the front cover and the cylinder body.

The clamping bush is connected with the front end part of the main shaft through a bush clamping bolt.

The invention has the beneficial effects that: the invention has the advantages of reasonable and simple structure, small volume, quick action response, strong clamping force, no eccentricity, easy disassembly and assembly and more convenient maintenance.

Drawings

Fig. 1 is a schematic sectional view showing a state in which the present invention is used.

In the figure: 1-a base; 2-cylinder body; 3-a main shaft; 4-a main shaft sealing ring; 5-front end of main shaft; 6-the middle part of the main shaft; 7-rear end of the main shaft; 8-clamping the tile; 9-tile clamping bolt; 10-a belleville spring; 11-spacer bush; 12-a piston; 13-piston seal ring; 14-a front cover; 15-front cover bolt; 16-front cover sealing ring; 17-oil inlet hole; 18-locking nut; 19-rear support ring; 20-a base plate; 21-supporting a vertical plate; 22-fixing bolts; 23-left clamping mechanism; 24-a right clamping mechanism; 25-a drill rod; 26-front cover flange hole; 27-rear support ring flange hole; 28-gap; 29-oil inlet tank; 30-front end step; 31-rear step; 32-rear support ring bolt.

Detailed Description

The present invention is described in detail below with reference to the attached drawings.

As shown in figure 1, a double-cylinder double-acting drill rod holder comprises a base 1, a left clamping mechanism 23 and a right clamping mechanism 24 which are arranged on the base 1 and are opposite to each other, wherein each of the left clamping mechanism 23 and the right clamping mechanism 24 comprises a cylinder body 2, a front cover 14 connected to the front end of the cylinder body 2 through a front cover bolt 15, a main shaft 3 arranged in the cylinder body 2, a disc-shaped piston 12 connected to the rear end of the main shaft 3 and a clamping tile 8 positioned on the front side of the middle part of the front cover 14, a circular ring-shaped spacer 11 is formed in the cylinder body 2, the spacer 11 divides an inner cavity of the cylinder body 2 into a spring cavity and a piston 12 cavity positioned behind the spring cavity, the spring cavity is communicated with the piston 12 cavity through a middle hole of the spacer 11, the main shaft 3 penetrates through the middle hole, a gap 28 is reserved between the main shaft 3 and the hole wall of the middle hole, the cylinder body 2 is provided with an oil inlet 17, the oil, the butterfly spring 10 is connected between the main shaft 3 and the spacer 11, the piston 12 is located in a piston 12 cavity, the piston 12 is in sealing fit with the cylinder body 2 through a piston sealing ring 13, the main shaft 3 forwards penetrates through a shaft hole in the middle of the front cover 14 to be connected with the clamping tile 8, the main shaft 3 is in sealing fit with the shaft hole of the front cover 14 through a main shaft sealing ring 4, and the clamping tile 8 of the left clamping mechanism 23 is opposite to the clamping tile 8 of the right clamping mechanism 24.

The invention is a normal close type clamper, when in work, hydraulic oil enters a spring cavity through an oil inlet 17, the hydraulic oil fills the spring cavity and enters a piston 12 cavity through a gap 28 between a main shaft 3 and the hole wall of a middle hole, the hydraulic oil props against the piston 12 backwards, and the piston 12 drives a clamping tile 8 to move backwards through the main shaft 3, so that the clamping tile 8 is opened.

The front end face of the spacer 11 is provided with an oil inlet groove 29 opposite to the oil inlet hole 17, and the oil inlet groove 29 extends inwards to the middle hole. The oil feed groove 29 allows the hydraulic oil to flow more smoothly to the center hole and enter the piston 12 cavity through the clearance 28.

The main shaft 3 comprises a main shaft front end part 5, a main shaft middle part 6 and a main shaft rear end part 7 which are sequentially formed from front to back, the diameter of the main shaft front end part 5 is larger than that of the main shaft middle part 6, the diameter of the main shaft middle part 6 is larger than that of the main shaft rear end part 7, a front end step 30 is formed between the main shaft front end part 5 and the main shaft middle part 6, and the front end of the belleville spring 10 abuts against the front end step 30, so that the main shaft 3 is clamped with the clamping shoe 8, and the clamping shoe 8 is kept in a normally closed state.

The piston 12 is sleeved on the rear end part 7 of the main shaft, a rear end step 31 is formed between the middle part 6 of the main shaft and the rear end part 7 of the main shaft, the middle part of the front end of the piston 12 is in contact with the rear end step 31, the rear end part 7 of the main shaft penetrates through the piston 12 to be connected with a lock nut 18, and a piston sealing ring 13 is arranged between the rear end part 7 of the main shaft and the piston 12.

The outer edge of the front cover 14 is provided with a ring of front cover flange holes 26, the outer circumference of the rear end of the cylinder body 2 is provided with a rear support ring 19, and the outer edge of the rear support ring 19 is provided with a ring of rear support ring flange holes 27.

The base 1 comprises a bottom plate 20 and a plurality of supporting vertical plates 21 arranged on the bottom plate 20, the front cover 14 is connected with the corresponding supporting vertical plates 21 through front cover flange holes 26 and fixing bolts 22, and the rear supporting ring 19 is connected with the corresponding supporting vertical plates 21 through rear supporting ring flange holes 27 and rear supporting ring bolts 32.

A front cover seal ring 16 is provided between the front cover 14 and the cylinder block 2. The shoe 8 is connected to the spindle nose 5 by a shoe bolt 9.

The invention has the advantages of reasonable and simple structure, small volume, quick action response, strong clamping force, no eccentricity, easy disassembly and assembly and more convenient maintenance.

Finally, it should be noted that the above-mentioned contents are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, and that the simple modifications or equivalent substitutions of the technical solutions of the present invention by those of ordinary skill in the art can be made without departing from the spirit and scope of the technical solutions of the present invention.