阅读说明：本技术 一种冶金行业液压缸夹紧装置 (Hydraulic cylinder clamping device in metallurgical industry ) 是由 莫祖杰 何世浩 罗庆革 杨剑洪 吕典武 郑海松 冯飞 张朗铭 潘晶 覃英智 刁西 于 2021-08-20 设计创作，主要内容包括：本发明公开了一种冶金行业液压缸夹紧装置,包括,支撑单元,所述支撑单元具有分别与液压缸筒两端相对应的容置空间；夹持机构,位于所述支撑单元的第一容置空间处,所述夹持机构限制所述液压缸筒的第一方向；以及,限位机构,位于所述支撑单元的第二容置空间处,所述限位机构限制所述液压缸筒的第二方向。本发明能够对液压缸的前后左右四个方位进行夹持固定,固定效果好,且固定操作简单,便于对液压缸进行拆装。(The invention discloses a hydraulic cylinder clamping device in the metallurgical industry, which comprises a supporting unit, a clamping unit and a clamping unit, wherein the supporting unit is provided with accommodating spaces corresponding to two ends of a hydraulic cylinder barrel respectively; the clamping mechanism is positioned in the first accommodating space of the supporting unit and limits the first direction of the hydraulic cylinder barrel; and the limiting mechanism is positioned in the second accommodating space of the supporting unit and limits the second direction of the hydraulic cylinder barrel. The hydraulic cylinder fixing device can clamp and fix the hydraulic cylinder in four directions, namely front, back, left and right directions, has a good fixing effect, is simple in fixing operation, and is convenient to disassemble and assemble the hydraulic cylinder.)

1. The utility model provides a metallurgical industry pneumatic cylinder clamping device which characterized in that: comprises the steps of (a) preparing a mixture of a plurality of raw materials,

the supporting unit (100) is provided with accommodating spaces (N1, N2) corresponding to two ends of the hydraulic cylinder barrel (401) respectively;

a clamping mechanism (200) located at a first receiving space (N1) of the support unit (100), the clamping mechanism (200) limiting a first direction of the hydraulic cylinder (401); and the number of the first and second groups,

and the limiting mechanism (300) is positioned in the second accommodating space (N2) of the supporting unit (100), and the limiting mechanism (300) limits the second direction of the hydraulic cylinder barrel (401).

2. The metallurgical industry hydraulic cylinder clamping device of claim 1, wherein: the first accommodating space (N1) is an accommodating groove formed in the supporting unit (100), and the clamping mechanism (200) comprises clamping pieces (201) located on two sides of the accommodating groove and control mechanisms (202) connected with the clamping pieces (201) respectively;

wherein the control mechanism (202) controls the clamping pieces (201) on two sides to move reversely.

3. The metallurgical industry hydraulic cylinder clamping device of claim 2, wherein: the clamping piece (201) is arranged oppositely through a sliding rail (201a), the control mechanism (202) comprises a lead screw (202a) and a sliding block nut (202b), the lead screw (202a) is perpendicular to the sliding rail (201a), and the sliding block nut (202b) is hinged to the clamping piece (201) through a connecting rod (202 c).

4. The metallurgical industry hydraulic cylinder clamping device of claim 3, wherein: the clamping mechanism (200) further comprises a locking mechanism (203), the locking mechanism (203) comprises a limiting gear (203a), a fixed piece (203b) and a movable piece (203c), the limiting gear (203a) and the screw rod (202a) rotate synchronously, and the fixed piece (203b) is provided with an internal tooth groove (203b-1) meshed with the limiting gear (203 a);

wherein the movable piece (203c) can move along the axial direction of the lead screw (202a) so as to enable the limit gear (203a) and the internal tooth groove (203b-1) to be separated from each other.

5. The metallurgical industry hydraulic cylinder clamping device of claim 4, wherein: the limiting gear (203a) is sleeved on the outer side of a rotating shaft (204) axially connected with the lead screw (202a), a polygonal inner cavity (203a-1) is axially arranged on the limiting gear (203a), and a push block (204a) matched with the polygonal inner cavity (203a-1) is fixedly arranged on the rotating shaft (204).

6. The metallurgical industry hydraulic cylinder clamping device of claim 5, wherein: the movable piece (203c) comprises a rotating seat (203c-1) sleeved on the outer side of the rotating shaft (204), and the limiting gear (203a) is rotatably connected with the rotating seat (203 c-1).

7. The metallurgical industry hydraulic cylinder clamping device of claim 6, wherein: the locking mechanism (203) further comprises a cylinder body (203d) and a piston piece (203e) in sealing contact with the inner wall of the cylinder body (203d), and the rotating shaft (204) penetrates through the cylinder body (203d) and the piston piece (203 e);

the movable piece (203c) further comprises a connecting rod (203c-2) fixedly connected with the piston piece (203e), and the connecting rod (203c-2) penetrates through a first end cover (203d-1) of the cylinder body (203d) and is fixedly connected with the rotating seat (203c-1) located outside the cylinder body (203 d).

8. The metallurgical industry hydraulic cylinder clamping device of claim 7, wherein: a spring (203f) is connected between the piston piece (203e) and the first end cover (203d-1), and an inflation cavity (P1) is reserved between the piston piece (203e) and the second end cover (203d-2) of the cylinder body (203 d).

9. The hydraulic cylinder clamping device in the metallurgical industry as set forth in any one of claims 5 to 8, wherein: the limiting mechanism (300) comprises two limiting rods (301) which are distributed in parallel, the limiting rods (301) are perpendicular to the rotating shaft (204), and a second accommodating space (N2) is formed by the space between the two limiting rods (301);

the limiting mechanism (300) further comprises an operating device (302) for driving the two limiting rods (301) to move along the supporting unit (100) in the opposite directions.

10. The metallurgical industry hydraulic cylinder clamping device of claim 9, wherein: the operating device (302) comprises a screw rod (302a) and a supporting block (302b) which are perpendicular to the limiting rods (301), the supporting block (302b) is located between the two limiting rods (301), and the middle part of the screw rod (302a) is rotatably connected with the supporting block (302 b);

two ends of the screw rod (302a) are respectively in threaded connection with the limiting rod (301);

wherein, the screw thread directions of both ends of the screw rod (302a) are opposite.

Technical Field

The invention belongs to the technical field of clamping devices in the metallurgical industry, and particularly relates to a hydraulic cylinder clamping device in the metallurgical industry.

Background

Compared with the traditional technology, the hydraulic technology has the advantages of large transmission amount and light dead weight, can be applied to heavy, large and extra-large equipment, has the function that other equipment cannot replace the hydraulic technology in the metallurgical field, and is widely applied to metal smelting and subsequent finish machining.

The pneumatic cylinder is as the execute component among the hydraulic pressure technique, generally locks layer upon layer through bolt screw thread etc. for increasing the fixed effect to the pneumatic cylinder, generally need adopt a plurality of bolts to fix, and the process is comparatively loaded down with trivial details, and then is not convenient for install and change the pneumatic cylinder.

Disclosure of Invention

This section is for the purpose of summarizing some aspects of embodiments of the invention and to briefly introduce some preferred embodiments. In this section, as well as in the abstract and the title of the invention of this application, simplifications or omissions may be made to avoid obscuring the purpose of the section, the abstract and the title, and such simplifications or omissions are not intended to limit the scope of the invention.

The present invention has been made keeping in mind the above and/or other problems occurring in the prior art.

In order to solve the technical problems, the invention provides the following technical scheme: a hydraulic cylinder clamping device in the metallurgical industry comprises,

the supporting unit is provided with accommodating spaces (a) corresponding to two ends of the hydraulic cylinder barrel respectively;

the clamping mechanism is positioned in the first accommodating space of the supporting unit and limits the first direction of the hydraulic cylinder barrel; and the number of the first and second groups,

and the limiting mechanism is positioned in the second accommodating space of the supporting unit and limits the second direction of the hydraulic cylinder barrel.

As a preferred scheme of the hydraulic cylinder clamping device in the metallurgical industry, the invention comprises the following steps: the first accommodating space is an accommodating groove formed in the supporting unit, and the clamping mechanism comprises clamping pieces located on two sides of the accommodating groove and control mechanisms connected with the clamping pieces respectively;

wherein, the control mechanism controls the clamping pieces on the two sides to move reversely.

As a preferred scheme of the hydraulic cylinder clamping device in the metallurgical industry, the invention comprises the following steps: the clamping piece is arranged oppositely through a sliding rail, the control mechanism comprises a lead screw and a sliding block nut, the lead screw is perpendicular to the sliding rail, and the sliding block nut is hinged to the clamping piece through a connecting rod.

As a preferred scheme of the hydraulic cylinder clamping device in the metallurgical industry, the invention comprises the following steps: the clamping mechanism further comprises a locking mechanism, the locking mechanism comprises a limiting gear, a fixing piece and a moving piece, the limiting gear and the screw rod rotate synchronously, and the fixing piece is provided with an inner tooth groove meshed with the limiting gear;

the movable piece can axially move along the lead screw so as to enable the limiting gear and the inner tooth groove to be separated from each other.

As a preferred scheme of the hydraulic cylinder clamping device in the metallurgical industry, the invention comprises the following steps: the limiting gear is sleeved on the outer side of a rotating shaft axially connected with the lead screw, a polygonal inner cavity is axially arranged on the limiting gear, and a push block matched with the polygonal inner cavity is fixedly arranged on the rotating shaft.

As a preferred scheme of the hydraulic cylinder clamping device in the metallurgical industry, the invention comprises the following steps: the movable part comprises a rotating seat sleeved on the outer side of the rotating shaft, and the limiting gear is rotatably connected with the rotating seat.

As a preferred scheme of the hydraulic cylinder clamping device in the metallurgical industry, the invention comprises the following steps: the locking mechanism further comprises a cylinder and a piston piece in sealing contact with the inner wall of the cylinder, and the rotating shaft penetrates through the cylinder and the piston piece;

the moving part further comprises a connecting rod fixedly connected with the piston piece, and the connecting rod penetrates through the first end cover of the cylinder body and is fixedly connected with the rotating seat positioned outside the cylinder body.

As a preferred scheme of the hydraulic cylinder clamping device in the metallurgical industry, the invention comprises the following steps: a spring is connected between the piston piece and the first end cover, and an inflation cavity is reserved between the piston piece and the second end cover of the barrel.

As a preferred scheme of the hydraulic cylinder clamping device in the metallurgical industry, the invention comprises the following steps: the limiting mechanism comprises two limiting rods which are distributed in parallel, the limiting rods are perpendicular to the rotating shaft, and the distance between the two limiting rods forms the second accommodating space;

the limiting mechanism further comprises an operating device for driving the two limiting rods to move along the supporting unit in the opposite direction.

As a preferred scheme of the hydraulic cylinder clamping device in the metallurgical industry, the invention comprises the following steps: the operating device comprises a screw rod and a supporting block, wherein the screw rod is vertical to the limiting rods, the supporting block is positioned between the two limiting rods, and the middle part of the screw rod is rotatably connected with the supporting block;

the two ends of the screw rod are respectively in threaded connection with the limiting rod;

wherein, the screw thread direction at both ends of screw rod is opposite.

Compared with the prior art, the invention has the following beneficial effects:

according to the novel hydraulic cylinder clamping device in the metallurgical industry, the clamping mechanism and the supporting device are respectively arranged at the top and the middle of the inner side of the supporting frame, the bottom of the cylinder body of the hydraulic cylinder is supported through the supporting plate of the supporting device, the fixing mechanism is arranged at the rear end of the supporting plate, the left side and the right side of the bottom of each hydraulic cylinder are clamped and fixed through the fixing mechanism, the front clamping plate and the rear clamping plate of the clamping mechanism are used for respectively clamping and fixing the front side and the rear side of the top of the hydraulic cylinder to support the hydraulic cylinder, the hydraulic cylinder is clamped and fixed in four directions, namely the front side, the rear side, the left side and the right side, the fixing effect is good, each fixing operation only needs to rotate one bolt head or one rotating rocker, the fixing operation is simple, and the hydraulic cylinder is convenient to disassemble and assemble.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise. Wherein:

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

FIG. 2 is a schematic view of the overall structure of the hydraulic cylinder of the present invention after installation;

FIG. 3 is a schematic structural view of a spacing mechanism of the present invention;

FIG. 4 is a schematic structural view of a clamping mechanism in a first accommodating space according to the present invention;

FIG. 5 is a schematic structural view of a clamping mechanism in a support plate mounting cavity according to the present invention;

FIG. 6 is a schematic view of the internal structure of the joint between the locking mechanism and the clamping mechanism according to the present invention;

FIG. 7 is a schematic view of the piston member connected to the movable member according to the present invention;

FIG. 8 is a schematic structural view of the cartridge of the present invention;

fig. 9 is a schematic view of the internal structure of the locking mechanism of the present invention.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, specific embodiments thereof are described in detail below with reference to examples of the specification.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.

Furthermore, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one implementation of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.

Example 1

Referring to fig. 1 and 2, a first embodiment of the present invention provides a hydraulic cylinder clamping device in the metallurgical industry, which includes a supporting unit 100, a clamping mechanism 200, and a limiting mechanism 300, where the supporting unit 100 has accommodating spaces corresponding to two ends of a hydraulic cylinder 401, respectively, one end of the hydraulic cylinder 401 is disposed in a first accommodating space N1, and the other end of the hydraulic cylinder 401 is disposed in a second accommodating space N2; the clamping mechanism 200 is located at the first accommodating space N1 of the supporting unit 100, and the clamping mechanism 200 limits the first direction of the hydraulic cylinder 401; the limiting mechanism 300 is located in the second accommodating space N2 of the supporting unit 100, and the limiting mechanism 300 limits the second direction of the hydraulic cylinder 401.

In the present embodiment, the first direction and the second direction are perpendicular to each other, and for example, the first direction is the left-right direction of the hydraulic cylinder 401, and the second direction is the front-rear direction of the hydraulic cylinder 401.

In the embodiment, the clamping mechanism 200 and the limiting mechanism 300 are used for clamping and fixing the hydraulic cylinder barrel 401 in four directions, namely front, rear, left and right directions, respectively, so that the fixing effect is good.

Example 2

Referring to fig. 1 to 3, this embodiment is different from the first embodiment in that: the supporting unit 100 comprises supporting legs 101 at two sides and a supporting plate 102 positioned between the supporting legs 101 at the two sides, the supporting plate 102 is positioned in the middle of the supporting legs 101, the first accommodating space N1 is an accommodating groove formed in the supporting plate 102, and a through hole for the output rod 402 of the hydraulic cylinder 400 to extend out is formed in the accommodating groove;

the limiting mechanism 300 comprises two limiting rods 301 which are distributed in parallel, the two limiting rods 301 are positioned between the two supporting legs 101 at the two sides and positioned at the tops of the supporting legs 101, and a second accommodating space N2 is formed between the two limiting rods 301;

the hydraulic cylinder 400 is placed in the accommodating groove in an inverted manner, the output rod 402 extends out of the through hole, one end of the hydraulic cylinder barrel 401 is placed in the first accommodating space N1 and is supported by the supporting plate 102, and the other end of the hydraulic cylinder barrel 401 is located in the second accommodating space N2 between the two limiting rods 301.

It should be noted that the clamping mechanism 200 includes clamping pieces 201 located at both sides of the accommodating groove and control mechanisms 202 respectively connected to the clamping pieces 201, wherein the control mechanisms 202 control the clamping pieces 201 at both sides to move in opposite directions, and the clamping pieces 201 at both sides can be simultaneously controlled to move in opposite directions by the control mechanisms 202, so that the clamping pieces 201 at both sides can simultaneously clamp and fix the end portion of the hydraulic cylinder 401.

The limiting mechanism 300 comprises an operating device 302 for driving two limiting rods 301 to synchronously and reversely move, guide rails 101a are respectively arranged on the supporting legs 101, two ends of each limiting rod 301 are respectively arranged on the guide rails 101a in a sliding mode, the limiting rods 301 on two sides can be simultaneously controlled to synchronously and reversely move through the limiting mechanism 300, and the limiting rods 301 on two sides can simultaneously clamp and fix the end portions of the hydraulic cylinder barrel 401.

In the embodiment, only one control mechanism 202 or one operating device 302 needs to be controlled for each fixing operation, so that the fixing operation is simple and the hydraulic cylinder 400 is convenient to disassemble and assemble.

Example 3

Referring to fig. 1 to 3, this embodiment is different from the first embodiment in that: the operating device 302 comprises a screw 302a and a supporting block 302b which are vertical to the limiting rods 301, the supporting block 302b is positioned between the two limiting rods 301 and is fixed on the supporting foot 101, and the middle part of the screw 302a is rotatably connected with the supporting block 302 b; the screw 302a is formed by coaxially connecting a first screw 302a-1 and a second screw 302a-2, the first screw 302a-1 and the second screw 302a-2 are respectively in threaded connection with a limiting rod 301, and the thread directions of the first screw 302a-1 and the second screw 302a-2 are opposite; the screw 302a is rotated to drive the two side limiting rods 301 to move oppositely along the guide rail 101 a.

Of course, the operating device 302 may further include a rotating handle 302c connected to the screw 302a, and the screw 302a is operated to rotate more conveniently and more easily by rotating the rotating handle 302 c; in order to prevent the stop rod 301 from falling off the guide rail 101a, a person skilled in the art may also provide a stop at the end of the guide rail 101a to achieve the above purpose, and all of them are within the protection scope of the present invention.

It should be noted that the limiting rod 301 is arranged perpendicular to the lead screw 202a, that is, the limiting rod 301 is arranged parallel to the slide rail 201a, and the clamping direction of the limiting rod 301 and the clamping direction of the clamping member 201 are perpendicular to each other, so that the hydraulic cylinder 401 is clamped and fixed in four directions, namely, front, back, left and right.

Example 4

Referring to fig. 4 and 5, this embodiment is different from the first embodiment in that: specifically, the support plate 102 is respectively provided with an installation cavity N3 corresponding to the first accommodating space N1, and the control mechanism 202 is installed in the installation cavity N3;

the mounting cavity N3 is located on one side of the first accommodating space N1, the mounting cavity N3 is provided with a slide rail 201a near the first accommodating space N1, the clamping pieces 201 are distributed at two ends of the slide rail 201a, and the clamping pieces 201 are respectively slidably arranged on the slide rail 201a through the sliding blocks 201 b;

the control mechanism 202 comprises a lead screw 202a and a slider nut 202b, the lead screw 202a is perpendicular to the slide rail 201a, the middle part of the slide rail 201a is provided with a fixing part 201c, and the end part of the lead screw 202a is rotatably connected with the fixing part 201c through a bearing; the sliding block nut 202b is limited by the mounting cavity N3 and cannot rotate in the circumferential direction, the sliding block nut 202b is in threaded connection with the lead screw 202a, the lead screw 202a can drive the sliding block nut 202b to move axially when rotating, the sliding block nut 202b is hinged with the sliding block 201b through the connecting rod 202c, and the sliding block nuts 201b on two sides can be simultaneously driven to move oppositely along the sliding rail 201a when moving axially.

It should be noted that the slider nut 202b is restricted by the mounting cavity N3 and cannot rotate in the circumferential direction, and may be implemented by providing a guide rail extending in the axial direction of the lead screw 202a in the mounting cavity N3, and guiding and moving the slider nut 202b along the guide rail. Of course, other conventional structures may be adopted by those skilled in the art to achieve the above-mentioned objectives, and all such structures are within the protection scope of the present invention.

Example 5

Referring to fig. 5 and 6, this embodiment is different from the first embodiment in that: the clamping mechanism 200 further comprises a locking mechanism 203, the locking mechanism 203 comprises a limit gear 203a, a fixed piece 203b and a movable piece 203c, and the limit gear 203a and the lead screw 202a synchronously rotate;

the fixing piece 203b is in a cylindrical shape sleeved on the outer side of the limiting gear 203a, an inner tooth groove 203b-1 meshed with the limiting gear 203a is formed in the fixing piece 203b, and when the limiting gear 203a is embedded into the inner tooth groove 203b-1, the limiting gear 203a cannot rotate in the circumferential direction, namely, the screw 202a cannot rotate, and the purpose of locking is achieved;

the movable piece 203c can move along the axial direction of the lead screw 202a to enable the limit gear 203a and the internal tooth groove 203b-1 to be separated from each other, when the limit gear 203a is separated, the limit gear 203a is not limited, and the lead screw 202a can rotate freely, so that the unlocking purpose is achieved.

Specifically, a rotating shaft 204 is further fixedly connected to the axial direction of the screw 202a, a sliding member 203a-2 is fixedly arranged at the axis of the limit gear 203a, the sliding member 203a-2 is sleeved outside the rotating shaft 204 and can axially slide along the rotating shaft 204, a polygonal inner cavity 203a-1 extending along the axial direction is further arranged in the sliding member 203a-2, a push block 204a matched with the polygonal inner cavity 203a-1 is fixedly arranged on the rotating shaft 204, when the sliding member 203a-2 axially slides along the rotating shaft 204, the push block 204a is always positioned in the polygonal inner cavity 203a-1, namely when the limit gear 203a and the inner tooth groove 203b-1 are separated from each other, the push block 204a is still positioned in the polygonal inner cavity 203a-1, namely, the rotating shaft 204 synchronously rotates with the limit gear 203a through the push block 204a, and when the limit gear 203a and the inner tooth groove 203b-1 are separated from each other, the limit gear 203a is unlimited, and at the moment, the screw 202a can be driven to rotate by rotating the rotating shaft 204; when the limit gear 203a is embedded in the inner tooth groove 203b-1, the limit gear 203a limits the rotation shaft 204 to be incapable of rotating, so that the locking purpose is realized, and the disassembly is impossible.

It should be noted that the moving part 203c includes a rotating base 203c-1 sleeved outside the rotating shaft 204, the limit gear 203a is rotatably connected with the rotating base 203c-1 through a bearing, the moving part 203c and the limit gear 203a are axially fixed relatively, and the axial movement of the limit gear 203a can be driven by the axial movement of the moving part 203 c; meanwhile, the limit gear 203a can rotate around the circumferential direction of the rotating seat 203c-1, and the limit gear 203a can rotate freely in the circumferential direction.

Example 6

Referring to fig. 5 to 8, this embodiment is different from the first embodiment in that: the locking mechanism 203 further comprises a cylinder 203d and a piston member 203e in sealing contact with the inner wall of the cylinder 203d, the two axial ends of the cylinder 203d are closed by a first end cover 203d-1 and a second end cover 203d-2, the cylinder 203d is fixedly connected with a fixing member 203b along the axial direction, the piston member 203e is slidably arranged between the first end cover 203d-1 and the second end cover 203d-2, and a rotating shaft 204 axially penetrates through the cylinder 203d, the first end cover 203d-1, the piston member 203e and the second end cover 203 d-2;

the movable member 203c further includes connecting rods 203c-2 fixedly connected to the piston member 203e, the connecting rods 203c-2 are uniformly distributed along the circumferential direction of the rotating shaft 204, a gap is reserved between two adjacent connecting rods 203c-2, and the connecting rod 203c-2 penetrates through the first end cover 203d-1 of the cylinder 203d and is fixedly connected to the rotating base 203c-1 located outside the cylinder 203 d.

It should be noted that a spring 203f is connected between the piston member 203e and the first end cap 203d-1, a gas filling cavity P1 is left between the piston member 203e and the second end cap 203d-2 of the cylinder 203d, and a gas port 203d-3 is left on the side wall of the gas filling cavity P1.

High-pressure gas is filled into the gas charging cavity P1 through the gas interface 203d-3, the piston piece 203e is pushed to compress the spring 203f to move in the cylinder 203d, the connecting rod 203c-2 is pushed to drive the rotating seat 203c-1 and the limit gear 203a outside the cylinder 203d to axially move, so that the limit gear 203a is separated from the inner tooth groove 203b-1, the limit gear 203a is unlimited and is in an unlocking state.

High-pressure gas in the inflation cavity P1 is exhausted from the gas interface 203d-3, the spring 203f pushes the piston piece 203e to reset, the piston piece 203e drives the rotating seat 203c-1 and the limiting gear 203a outside the cylinder 203d to axially move through the connecting rod 203c-2, and the limiting gear 203a is embedded into the inner tooth groove 203b-1, so that the locking purpose is realized.

Example 7

Referring to fig. 5 to 9, this embodiment is different from the first embodiment in that: the cylinder 203d is a hollow annular cylinder and comprises a first cylinder 203d-4 and a second cylinder 203d-5 positioned at the axle center of the first cylinder 203d-4, the rotating shaft 204 passes through the second cylinder 203d-5 and extends out to be connected with the handle 203g at the outer side, the rotating shaft 204 is in smooth contact with the inner wall of the second cylinder 203d-5, and the rotating shaft 204 freely rotates in the second cylinder 203 d-5;

the first cylinder 203d-4 and the second cylinder 203d-5 are integrally formed through a first end cover 203d-1, the second end cover 203d-2 closes the open ends of the first cylinder 203d-4 and the second cylinder 203d-5, the spring 203f is sleeved outside the second cylinder 203d-5, and the piston piece 203e is slidably connected outside the second cylinder 203 d-5.

It should be noted that an auxiliary gear 203h is further disposed on the rotating shaft 204 near the handle 203g, each parameter of the auxiliary gear 203h is the same as that of the limit gear 203a, when the rotating shaft is in an unlocked state, the auxiliary gear 203h and the limit gear 203a rotate synchronously, and the rotating position of the limit gear 203a can be determined by observing the rotating position of the auxiliary gear 203h, so that the limit gear 203a can smoothly enter the internal tooth groove 203 b-1.

In order to determine the rotation position of the auxiliary gear 203h, a spring reset piece 203i is arranged on the outer side of the second end cover 203d-2, the spring reset piece 203i comprises a shell 203i-1 fixed on the outer side of the second end cover 203d-2, a ball piece 203i-2 and a reset spring 203i-3, the ball piece 203i-2 and the reset spring 203i-3 are both wrapped by the shell 203i-1, the reset spring 203i-3 is arranged along the radial direction of the auxiliary gear 203h, the pretightening force of the reset spring 203i-3 enables the ball piece 203i-2 to partially extend out of the opening end of the shell 203i-1, and the extending part of the ball piece 203i-2 is located between two adjacent teeth of the auxiliary gear 203 h. When the auxiliary gear 203h rotates, the ball piece 203i-2 jumps from between two teeth on one side to between two teeth on the other side, and the rotating position of the auxiliary gear 203h can be determined; wherein, as long as the ball piece 203i-2 is ensured to be positioned between two teeth of the auxiliary gear 203h, the limit gear 203a is ensured to smoothly enter the inner tooth groove 203 b-1.

It should be noted that the above-mentioned embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.