阅读说明：本技术 自锁型弹簧夹紧机构 (Self-locking spring clamping mechanism ) 是由 樊春华 徐伟彪 于 2021-05-20 设计创作，主要内容包括：本发明公开自锁型弹簧夹紧机构,涉及冷轧管机领域。该自锁型弹簧夹紧机构,包括：小车箱体,所述小车箱体的上表面固定连接有前轴承和后轴承,所述前轴承和后轴承之间转动连接有主轴,且所述主轴的两端分别贯穿前轴承和后轴承并向两侧延伸；油缸,所述油缸固定连接在小车箱体的侧壁上。该自锁型弹簧夹紧机构,由于管坯在弹簧夹头中的压缩弹簧预紧力作用下抱紧管坯,产生了一个抱紧的摩擦力,使管坯在后座力的作用下,越抱越紧,起到了自锁夹紧的效果,放松时,只要油缸通过换向阀,使其向左移动,压缩弹簧由空心拉杆带动弹簧夹头同时向左移动,使其脱离内锥套的内锥面,弹簧夹头在自由状态下,放松了对管坯的抱紧。(The invention discloses a self-locking spring clamping mechanism, and relates to the field of cold pilger mills. This self-locking type spring clamping mechanism includes: the trolley comprises a trolley box body, wherein the upper surface of the trolley box body is fixedly connected with a front bearing and a rear bearing, a main shaft is rotatably connected between the front bearing and the rear bearing, and two ends of the main shaft respectively penetrate through the front bearing and the rear bearing and extend towards two sides; the oil cylinder is fixedly connected to the side wall of the trolley box body. This self-locking spring clamping mechanism, because the pipe is held tightly the pipe under the compression spring pretightning force effect of collet chuck to the pipe, produced a frictional force of holding tightly, make the pipe under the effect of back seat, hold more and more tightly more, played the tight effect of self-locking clamp, when relaxing, as long as the hydro-cylinder passes through the switching-over valve, make it move left, compression spring drives collet chuck and moves left simultaneously by hollow pull rod, make it break away from the interior conical surface of interior taper sleeve, collet chuck has relaxed holding tightly the pipe under free state.)

1. From lock type spring clamping mechanism, its characterized in that includes:

the trolley comprises a trolley box body (11), wherein the upper surface of the trolley box body (11) is fixedly connected with a front bearing (12) and a rear bearing (13), a main shaft (04) is rotatably connected between the front bearing (12) and the rear bearing (13), and two ends of the main shaft (04) respectively penetrate through the front bearing (12) and the rear bearing (13) and extend towards two sides;

the inner cone sleeve (02) is fixedly connected with one end of the main shaft (04), a collet chuck (01) is inserted into the inner wall of the inner cone sleeve (02), the collet chuck (01) is in threaded connection with a hollow pull rod (05), the hollow pull rod (05) is inserted into the main shaft (04), one end, far away from the collet chuck (01), of the hollow pull rod (05) penetrates through the main shaft (04) and extends to the outside, a compression spring (07) is sleeved on the inner wall of the main shaft (04), one end of the compression spring (07) is abutted against the inner wall of the main shaft (04), and the other end of the compression spring (07) is abutted against one end, located outside, of the hollow pull rod (05);

the oil cylinder (10), the oil cylinder (10) is fixedly connected to the side wall of the trolley box body (11).

2. The self-locking spring clamp mechanism of claim 1, further comprising: the outer rings of the front bearing (12) and the rear bearing (13) are fixedly connected with the trolley box body (11), and the inner rings of the front bearing (12) and the rear bearing (13) are fixedly connected with the outer surface of the main shaft (04).

3. The self-locking spring clamp mechanism of claim 1, further comprising: a plurality of mounting holes are formed between the end parts of the inner taper sleeve (02) and the main shaft (04), and a plurality of taper pins (14) are fixedly inserted into the inner walls of the mounting holes respectively.

4. The self-locking spring clamp mechanism of claim 1, further comprising: the inner wall of the main shaft (04) is fixedly connected with a rotation stopping flat key (03), and the rotation stopping flat key (03) is inserted into the outer surface of the inner taper sleeve (02).

5. The self-locking spring clamp mechanism of claim 1, further comprising: an oil cylinder connecting screw (09) is arranged between the oil cylinder (10) and the side wall of the trolley box body (11), and the oil cylinder (10) is fixedly connected with the side wall of the trolley box body (11) through the oil cylinder connecting screw (09).

6. The self-locking spring clamp mechanism of claim 1, further comprising: the outer surface of the hollow pull rod (05) is sleeved with a first spring pre-tightening adjusting pad (06) and a second spring pre-tightening adjusting pad (08), the two sides of the first spring pre-tightening adjusting pad (06) are respectively abutted to the side wall of the main shaft (04) and one end of the compression spring (07), and the two sides of the second spring pre-tightening adjusting pad (08) are respectively abutted to the other end of the compression spring (07) and one end of the hollow pull rod (05) in the outside.

7. The self-locking spring clamp mechanism of claim 1, further comprising: the axial leads of the spring chuck (01), the inner taper sleeve (02), the main shaft (04), the hollow pull rod (05) and the compression spring (07) are coincided.

Technical Field

The invention relates to the technical field of cold pilger mills, in particular to a self-locking spring clamping mechanism.

Background

The cold pilger mill is a process device for cold rolling a pierced billet by using an annular hole shape. The machine has better cogging performance and can roll nonferrous metal seamless tubes with common precision. The cold tube mill is mainly characterized by high material utilization rate and better precision and surface roughness than cold drawn tubes.

In the existing trolley clamping mechanism, a clamping jaw is radially and centripetally contracted to clamp a pipe blank at the center, because when the clamping mechanism is in clamping work, the rotational inertia of parts is large when the parts rotate, and in high-frequency rotation, stop and intermittent operation, the energy consumption on a servo motor is large, the working frequency is greatly influenced, and then when the clamping mechanism is in clamping work, the service life of a working bearing of the parts with long-time heavy load is short, the working bearing is often abraded and replaced, so that the self-locking spring clamping mechanism is provided.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention discloses a self-locking type spring clamping mechanism to solve the problems in the background technology.

(II) technical scheme

In order to achieve the purpose, the invention is realized by the following technical scheme: a self-locking spring clamping mechanism comprising:

the trolley comprises a trolley box body, wherein the upper surface of the trolley box body is fixedly connected with a front bearing and a rear bearing, a main shaft is rotatably connected between the front bearing and the rear bearing, and two ends of the main shaft respectively penetrate through the front bearing and the rear bearing and extend towards two sides;

the inner cone sleeve is fixedly connected with one end of the main shaft, a spring chuck is inserted into the inner wall of the inner cone sleeve, the spring chuck is in threaded connection with a hollow pull rod, the hollow pull rod is inserted into the main shaft, one end, far away from the spring chuck, of the hollow pull rod penetrates through the main shaft and extends to the outside, a compression spring is sleeved on the inner wall of the main shaft, one end of the compression spring abuts against the inner wall of the main shaft, and the other end of the compression spring abuts against one end, located outside, of the hollow pull rod;

the oil cylinder is fixedly connected to the side wall of the trolley box body.

Preferably, the outer rings of the front bearing and the rear bearing are fixedly connected with the trolley box body, and the inner rings of the front bearing and the rear bearing are fixedly connected with the outer surface of the main shaft.

Preferably, a plurality of mounting holes are formed between the inner taper sleeve and the end part of the main shaft, and a plurality of taper pins are fixedly inserted on the inner walls of the mounting holes respectively.

Preferably, the inner wall of the main shaft is fixedly connected with a rotation stopping flat key, and the rotation stopping flat key is inserted on the outer surface of the inner taper sleeve.

Preferably, an oil cylinder connecting screw rod is arranged between the oil cylinder and the side wall of the trolley box body, and the oil cylinder is fixedly connected with the side wall of the trolley box body through the oil cylinder connecting screw rod.

Preferably, the outer surface of the hollow pull rod is sleeved with a first spring pre-tightening adjusting pad and a second spring pre-tightening adjusting pad, two sides of the first spring pre-tightening adjusting pad respectively abut against the side wall of the main shaft and one end of the compression spring, and two sides of the second spring pre-tightening adjusting pad respectively abut against the other end of the compression spring and one end, located outside, of the hollow pull rod.

Preferably, the axial leads of the spring chuck, the inner taper sleeve, the main shaft, the hollow pull rod and the compression spring are coincided.

The invention discloses a self-locking spring clamping mechanism, which has the following beneficial effects:

1. the self-locking spring clamping mechanism has the advantages that through the arranged compression spring, the pretightening force of the compression spring is utilized to force the spring chuck to move rightwards, the inner taper sleeve is used for clamping an intermediate tube blank in advance, the tube blank can move rightwards in the tube blank rolling work to generate a recoil force, the tube blank is tightly held under the pretightening force of the compression spring in the spring chuck, a holding friction force is generated, the tube blank is more tightly held under the action of the recoil force to achieve the self-locking clamping effect, when the tube blank is released, the oil cylinder only passes through the reversing valve to move leftwards, the compression spring drives the spring chuck to simultaneously move leftwards through the hollow pull rod to enable the spring chuck to be separated from the inner taper surface of the inner taper sleeve, and the spring chuck releases the holding of the tube blank in a free state.

2. According to the self-locking spring clamping mechanism, the thickness of the first spring pre-tightening adjusting pad or the second spring pre-tightening adjusting pad can be adjusted through the first spring pre-tightening adjusting pad or the second spring pre-tightening adjusting pad, and the pre-tightening force can be changed.

3. According to the self-locking spring clamping mechanism, the oil cylinder and the hollow pull rod are not in contact in rolling operation through the arranged oil cylinder and the hollow pull rod, so that the resistance in rotation is very small, only the rolling friction force exists between the main shaft and the front bearing and between the main shaft and the rear bearing, the effect is very ideal in practical application, the operation is stable, and the noise is very small.

Drawings

FIG. 1 is a schematic view of the structure of the present invention.

In the figure: 01. a collet chuck; 02. an inner taper sleeve; 03. a rotation-stopping flat key; 04. a main shaft; 05. a hollow pull rod; 06. a first spring pre-tightening adjusting pad; 07. a compression spring; 08. the second spring pre-tightening adjusting pad; 09. the oil cylinder is connected with the screw rod; 10. an oil cylinder; 11. a trolley box body; 12. a front bearing; 13. a rear bearing; 14. and (4) a taper pin.

Detailed Description

An embodiment of the present invention discloses a self-locking spring clamping mechanism, as shown in figure 1,

referring to fig. 1, the method includes:

the trolley comprises a trolley box body 11, wherein the upper surface of the trolley box body 11 is fixedly connected with a front bearing 12 and a rear bearing 13, a main shaft 04 is rotatably connected between the front bearing 12 and the rear bearing 13, and two ends of the main shaft 04 respectively penetrate through the front bearing 12 and the rear bearing 13 and extend towards two sides;

the inner cone sleeve 02 is fixedly connected with one end of the main shaft 04, a collet chuck 01 is inserted into the inner wall of the inner cone sleeve 02, the collet chuck 01 is connected with a hollow pull rod 05 in a threaded manner, the hollow pull rod 05 is inserted into the main shaft 04, one end, far away from the collet chuck 01, of the hollow pull rod 05 penetrates through the main shaft 04 and extends to the outside, a compression spring 07 is sleeved on the inner wall of the main shaft 04, one end of the compression spring 07 abuts against the inner wall of the main shaft 04, and the other end of the compression spring 07 abuts against one end, located outside, of the hollow pull rod 05;

the oil cylinder 10 is fixedly connected to the side wall of the trolley box body 11.

The outer rings of the front bearing 12 and the rear bearing 13 are fixedly connected with the trolley box body 11, and the inner rings of the front bearing 12 and the rear bearing 13 are fixedly connected with the outer surface of the main shaft 04.

A plurality of mounting holes are formed between the end portions of the inner taper sleeve 02 and the main shaft 04, a plurality of taper pins 14 are fixedly inserted into the inner walls of the mounting holes respectively, and the inner taper sleeve 02 and the main shaft 04 are effectively fixed through the arranged taper pins 14.

The inner wall of the main shaft 04 is fixedly connected with a rotation stopping flat key 03, the rotation stopping flat key 03 is inserted on the outer surface of the inner taper sleeve 02, and the rotation stopping flat key 03 drives the collet 01 to rotate together with the main shaft 04 through the inner taper sleeve 02 and the taper pin 14.

Be provided with hydro-cylinder connecting screw 09 between the lateral wall of hydro-cylinder 10 and dolly box 11, and hydro-cylinder 10 passes through hydro-cylinder connecting screw 09 and dolly box 11's lateral wall fixed connection, through the hydro-cylinder connecting screw 09 that sets up, during the installation, plays effectual fixed effect to hydro-cylinder 10 and dolly box 11, and when opening, is convenient for dismantle hydro-cylinder 10.

The outer surface of the hollow pull rod 05 is sleeved with a first spring pre-tightening adjusting pad 06 and a second spring pre-tightening adjusting pad 08, two sides of the first spring pre-tightening adjusting pad 06 respectively abut against the side wall of the main shaft 04 and one end of the compression spring 07, and two sides of the second spring pre-tightening adjusting pad 08 respectively abut against the other end of the compression spring 07 and one end of the hollow pull rod 05 which is located outside.

The axial leads of the spring chuck 01, the inner taper sleeve 02, the main shaft 04, the hollow pull rod 05 and the compression spring 07 are coincided.

The working principle is as follows: the pretightening force of a compression spring 07 is utilized to force a spring chuck 01 to move rightwards, an intermediate pipe blank is pre-clamped through an inner taper sleeve 02, the pipe blank moves rightwards in the pipe blank rolling work to generate a recoil force, the pipe blank is tightly held under the pretightening force of the compression spring 07 in the spring chuck 01 to generate a holding friction force, the pipe blank is held more and more tightly under the action of the recoil force to achieve the self-locking clamping effect, when in release, an oil cylinder 10 moves leftwards only through a reversing valve, the compression spring 07 drives the spring chuck 01 to move leftwards by a hollow pull rod 05 simultaneously to separate from an inner conical surface of the inner taper sleeve 02, the spring chuck 01 loosens the holding of the pipe blank in a free state, the pretightening force of the compression spring 07 is changed, the thickness of a first spring pretightening adjusting pad 06 or a second pretightening adjusting pad 08 can be adjusted, and the pretightening force can be changed, the rotation-stopping flat key 03 drives the spring chuck 01 to rotate together with the main shaft 04 by driving the spring chuck 01 and the taper pin 14 through the inner taper sleeve 02, the spring chuck 01 and the hollow pull rod 05 are connected by left-handed threads to play a role in preventing loosening in the working process, and the oil cylinder 10 and the hollow pull rod 05 are not in contact in the rolling work, so that the resistance in the rotation process is very small, only the rolling friction force is generated between the main shaft 04 and the front bearing 12 and the rear bearing 13, the effect is very ideal in practical application, the work is not only stable, and the noise is very small.

The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.