Pneumatic locking mechanism

Abstract

The utility model belongs to the technical field of clamps, and particularly relates to a pneumatic type locking mechanism which is characterized in that a shaft sleeve is assembled and connected to the upper portion of a mounting seat, a piston is slidably connected into the shaft sleeve, two air holes are sequentially formed in the lower portion of the shaft sleeve in the vertical direction, two oppositely-arranged clamping grooves are formed in the upper portion of the shaft sleeve, and mounting blocks are connected into the clamping grooves of the shaft sleeve; the outer side of the mounting block is sleeved with an elastic sleeve, the curvature of the outer side of the mounting block is the same as that of the outer side of the shaft sleeve, the upper end of the piston gradually shrinks towards the lower inner side, the section formed by shrinking of the upper end of the piston is a right trapezoid, and when the piston is located on the upper portion, the mounting block is coupled with a notch of the piston; the locking device is simple in structure, movement of the piston is converted into movement of the mounting block by controlling lifting of the piston, so that the position of the mounting block moving towards the outer side is controlled, locking of a locked object is achieved, and manual control is not needed.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of clamp, specifically relates to a pneumatic locking mechanism. BACKGROUND

[0002] Generally, when the workpiece is processed, the workpiece needs to be positioned and fixed through the locking mechanism, and the locking mechanism is a mechanical device for fixing, connecting or limiting the relative movement of objects, which realizes reliable locking of the objects through specific structure and principle to meet the needs of different application scenarios.

[0003] In the prior art, there are various ways to lock the workpiece, such as bolt and nut locking, pin locking, spring clamp locking, eccentric wheel locking and the like, but through these ways to lock the workpiece, the locking mechanism usually needs to be operated manually to lock the clamped part. UTILITY MODEL CONTENT

[0004] In view of the problems in the above background art, the utility model aims to provide a pneumatic locking mechanism to solve the problems in the above background art.

[0005] In order to achieve the above technical purpose, the utility model adopts the following technical scheme:

[0006] A pneumatic locking mechanism, the upper part of the mounting seat is assembled and connected with a shaft sleeve, the shaft sleeve is slidably connected with a piston, the lower part of the shaft sleeve is sequentially provided with two air holes in the vertical direction, the upper part of the shaft sleeve is provided with two oppositely arranged clamping grooves, the clamping groove of the shaft sleeve is connected with a mounting block, the outer side of the mounting block is provided with an elastic sleeve, the outer side of the mounting block has the same curvature as the outer side of the shaft sleeve, the upper end of the piston gradually shrinks inwardly downward, the cross section formed by the upper end of the piston is a right-angled trapezoid, when the piston is located at the upper part, the mounting block and the slot of the piston are coupled with each other.

[0007] Further limited, the shaft sleeve is sequentially provided with a first sealing groove and a second sealing groove between the two air holes, the first sealing groove is located on the inner side of the shaft sleeve, the second sealing groove is located on the outer side of the shaft sleeve, and the first sealing groove and the second sealing groove are both provided with a sealing ring.

[0008] Further limited, the outer side of the mounting block is provided with a mounting groove with a rectangular cross section, the elastic sleeve is arranged in the mounting groove, and the upper part of the shaft sleeve is provided with a slot with the same depth and height as the mounting groove.

[0009] Further limited, the elastic sleeve is a rubber sleeve.

[0010] Further limited, the mounting seat is opened with a let slot smaller than the upper height of the piston in the lower part of the shaft sleeve.

[0011] Further limited, the shaft part of the shaft sleeve is fixedly connected with a connecting seat, and the connecting seat is fixedly connected with the mounting seat through bolts.

[0012] Further limited, the lower end of the piston is fixedly connected with a positioning table, the diameter of the positioning table is greater than the lower end hole diameter of the shaft sleeve, the diameter of the positioning table is equal to the outer diameter of the shaft sleeve, the positioning table is opened with a third sealing groove, and the third sealing groove is assembled with a sealing ring in sliding sealing connection with the let slot of the mounting seat.

[0013] Further limited, the size of the let slot of the mounting seat is the same as that of the positioning table.

[0014] Compared with the prior art, the utility model has the advantages of the following:

[0015] The utility model discloses simple structure, through the control piston's lift, change the movement of piston into the movement of mounting block, thereby control mounting block's position that moves to the outside, realize the locking of the locked object, need not manual control.

[0016] The utility model discloses ingenious design, through the elastic cover of the outside of mounting block, thereby limit mounting block and shaft sleeve to separate, simultaneously, the elastic cover can take place elastic deformation, allow mounting block to move in certain range. DRAWINGS

[0017] The utility model can be further explained by the non - limiting embodiment shown in the drawings;

[0018] Figure 1 It is the structure schematic diagram of the utility model pneumatic type locking mechanism;

[0019] Figure 2 It is the structure schematic diagram of the utility model piston and shaft sleeve split state;

[0020] Figure 3 It is the structure schematic diagram of the utility model shaft sleeve;

[0021] Figure 4 It is the external structure schematic diagram of the utility model shaft sleeve;

[0022] Figure 5 It is the structure schematic diagram of the utility model mounting seat;

[0023] Figure 6 It is the shaft sleeve section view of the utility model;

[0024] Figure 7 It is the mounting block and piston assembly structure schematic diagram of the utility model;

[0025] The main element symbols are explained as follows:

[0026] mounting seat 1, let go of the slot 11, shaft sleeve 2, air hole 21, first sealing groove 22, second sealing groove 23, connecting seat 24, piston 3, positioning platform 31, third sealing groove 32;

[0027] mounting block 4, mounting groove 41. DETAILED DESCRIPTION

[0028] In order to make the person skilled in the art can better understand the utility model, the utility model technical scheme is further explained below in combination with the drawings and examples, obviously, the described examples are only a part of the utility model examples, rather than all examples. Based on the examples in the utility model, all other examples obtained by the person skilled in the art without making creative labor belong to the scope of protection of the utility model.

[0029] Unless otherwise defined, technical terms or scientific terms used in the present disclosure shall be understood as the usual meaning understood by persons skilled in the art to which the present disclosure belongs. The "first", "second" and similar words used in the present disclosure do not represent any order, quantity or importance, but are only used to distinguish different components. "Include" or "contain" and similar words mean that the elements or objects before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connected" or "connected" and similar words are not limited to physical or mechanical connection, but can include electrical connection, whether direct or indirect.

[0030] As Figures 1-7 A kind of pneumatic locking mechanism, as shown in the figure, including mounting seat 1, the upper part of mounting seat 1 is equipped with shaft sleeve 2, shaft sleeve 2 is slidably connected with piston 3, two air holes 21 are sequentially arranged in the vertical direction in the lower part of shaft sleeve 2, two opposite clamping grooves are arranged in the upper part of shaft sleeve 2, mounting block 4 is connected in the clamping groove of shaft sleeve 2, elastic sleeve is sleeved on the outside of mounting block 4, the curvature of the outside of mounting block 4 is same with the outside of shaft sleeve 2, the upper end of piston 3 gradually shrinks to the inside of downward, the cross section formed by the upper end of piston 3 is right trapezoid, when piston 3 is located in upper portion, mounting block 4 and the notch of piston 3 are mutually coupled.

[0031] The technical scheme is adopted in the embodiment, the mounting seat 1 is used for fixedly connecting the shaft sleeve 2, the piston 3 can move up and down in the shaft sleeve 2, the air hole 21 at the lower side is used for being connected with the air pipe, the mounting seat 1 is connected with the pneumatic control system, the clamping groove is communicated between the inside and the outside of the shaft sleeve 2, the mounting block 4 can move horizontally in the clamping groove, the elastic sleeve 5 is used for tightening the mounting block 4 to the inside, when the piston moves up to the uppermost position, the mounting block 4 is clamped in the cross section formed by the contraction of the upper portion of the piston 3, when the piston 3 moves down, the mounting block 4 gradually moves to the outside, the locked object is provided with a cavity, the upper end of the shaft sleeve 2 and the mounting block 4 are mounted in the cavity of the locked object, the position of the mounting block 4 is controlled by controlling the position of the piston 3, the distance between the outside edge of the mounting block 4 is different at different heights of the piston 3, and then the locked object is locked, when the piston 3 is at the lowermost position, the upper end edge of the piston 3 is in contact with the lower side of the mounting block 4, and the piston 3 always keeps contact with the mounting block 4 in the moving process.

[0032] With reference to Figure 6 The shaft sleeve 2 is sequentially provided with a first sealing groove 22 and a second sealing groove 23 between the two air holes 21, the first sealing groove 22 is located at the inside of the shaft sleeve 2, the second sealing groove 23 is located at the outside of the shaft sleeve 2, and sealing rings are mounted in the first sealing groove 22 and the second sealing groove 23. In the embodiment, the first sealing groove 22 and the second sealing groove 23 are sequentially arranged in the up-down direction, the sealing ring is mounted in the first sealing groove 23, the gap between the shaft sleeve 2 and the piston 3 is sealed, so that the gas in the up-down direction of the first sealing groove 23 cannot be communicated with each other, the second sealing groove 23 is located in the mounting seat 1, and the sealing ring in the second sealing groove 23 is used for sealing the gap between the mounting seat 1 and the shaft sleeve 2.

[0033] With reference to Figure 7 The outside of the mounting block 4 is provided with a mounting groove 41 with a rectangular cross section, the elastic sleeve is arranged in the mounting groove 41, and the upper portion of the shaft sleeve 2 is provided with a slot with the same depth and height as the mounting groove 41. In the embodiment, the mounting groove 41 is used for mounting the elastic sleeve 5, so that the elastic sleeve 5 is limited in the mounting groove 41, and the elastic sleeve 5 is prevented from moving up and down, and meanwhile, the circular arc groove formed in the shaft sleeve 2 is used for better mounting of the elastic sleeve 5.

[0034] The elastic sleeve is a rubber sleeve. In the embodiment, the material of the elastic sleeve 5 is further limited, and the material is preferably rubber.

[0035] With reference to Figure 1 The mounting seat 1 is provided with a clearance groove 11 smaller than the upper portion height of the piston 3 at the lower portion of the shaft sleeve 2. In the embodiment, the height of the clearance groove 11 is limited, when the piston 3 moves down, the piston 3 can only move down by a distance smaller than the upper portion of the piston 3, when the piston 3 moves down to be in contact with the bottom of the clearance groove 11, the upper end edge of the piston 3 is in contact with the lower portion of the mounting block 4.

[0036] Referring to Figure 2 The shaft part of the shaft sleeve 2 is fixedly connected with a connecting seat 24, and the connecting seat 24 is fixedly connected with the mounting seat 1 by bolts. In the embodiment, the shaft sleeve 2 is fixedly connected with the connecting seat 24, preferably by bolted connection.

[0037] Referring to Figure 2 The lower end of the piston 3 is fixedly connected with a positioning table 31, the diameter of the positioning table 31 is greater than the lower end hole diameter of the shaft sleeve 2, the diameter of the positioning table 31 is equal to the outer diameter of the shaft sleeve 2, the positioning table 31 is provided with a third sealing groove 32, and the third sealing groove 32 is provided with a sealing ring in sliding sealing connection with the accommodating groove of the mounting seat 1. In the embodiment, the outer diameter of the positioning table 31 is equal to the outer diameter of the shaft sleeve 2, so that the upper side of the positioning table 31 does not continue to move upward after being in contact with the shaft sleeve 2, the third sealing groove 32 is used for installing the sealing ring, and the upper side and the lower side of the third sealing groove 32 of the piston 3 are separated by the sealing ring, so that the gas at the lower side of the third sealing groove 32 cannot reach the upper part of the third sealing groove 32.

[0038] Referring to Figure 1 The size of the accommodating groove of the mounting seat 1 is the same as that of the positioning table 31. In the embodiment, the size of the positioning groove is limited to the size of the positioning table 31, the positioning table 31 is in sliding connection with the accommodating groove 11 of the mounting seat 1, and the accommodating groove 11 is used for limiting the moving distance of the piston, so that the piston cannot continue to move downward after being in contact with the bottom of the mounting seat 1.

[0039] Working principle: the movement of the piston 3 is controlled by the pneumatic control system installed in the mounting seat 1, the mounting seat 1 controls the piston 3 to move upward when the lower end of the piston 3 is ventilated, and the sealing ring in the third sealing groove 32 is used for preventing the gas at the lower part of the third sealing piston 3 from reaching the upper part of the third sealing groove 32. Since the inner part of the shaft sleeve 2 is provided with the first sealing groove 22, the sealing ring is installed in the first sealing groove 22, and the lower gas hole 21 is located at the lower part of the first sealing groove 22, so that when the lower gas hole 21 is ventilated, the space between the shaft sleeve 2 and the piston 3 tends to increase, so that the piston 3 moves downward, and the upper gas hole is used for connecting the space between the upper part of the piston and the shaft sleeve 2, so that the lifting of the piston is controlled by starting the control system.

[0040] The control mode of the utility model is automatically controlled by the controller, the control circuit of the controller can be realized by simple programming of the person skilled in the art, the power supply also belongs to the public knowledge in the field, and the utility model is mainly used for protecting mechanical devices, so the control mode and the circuit connection of the utility model are not explained in detail.

[0041] The above examples only illustrate the principles and effects of the present application, and are not intended to limit the present application. Any person skilled in the art can modify or change the above examples without departing from the spirit and scope of the present application. Therefore, all equivalent modifications or changes made by those skilled in the art without departing from the spirit and technical concept disclosed by the present application shall be covered by the claims of the present application.

Claims

1. A pneumatic locking mechanism comprising a mounting base (1), characterised in that: The upper part of the mounting base (1) is assembled and connected with a shaft sleeve (2), the shaft sleeve (2) is slidably connected with a piston (3), the lower part of the shaft sleeve (2) is sequentially provided with two air holes (21) in the vertical direction, the upper part of the shaft sleeve (2) is provided with two oppositely arranged clamping grooves, the clamping grooves of the shaft sleeve (2) are connected with mounting blocks (4), the outer side of the mounting block (4) is sleeved with an elastic sleeve, the outer side of the mounting block (4) has the same curvature as the outer side of the shaft sleeve (2), the upper end of the piston (3) gradually shrinks inwardly and downwardly, the cross section of the upper end of the piston (3) is a right trapezoid, when the piston (3) is located at the upper part, the mounting block (4) and the notch of the piston (3) are coupled with each other.

2. The pneumatic locking mechanism of claim 1, wherein: The shaft sleeve (2) is sequentially provided with a first sealing groove (22) and a second sealing groove (23) between the two air holes (21), the first sealing groove (22) is located at the inner side of the shaft sleeve (2), the second sealing groove (23) is located at the outer side of the shaft sleeve (2), the first sealing groove (22) and the second sealing groove (23) are both provided with sealing rings.

3. The pneumatic locking mechanism of claim 2, wherein: The outer side of the mounting block (4) is provided with a mounting groove (41) with a rectangular cross section, the elastic sleeve is arranged in the mounting groove (41), and the upper part of the shaft sleeve (2) is provided with a notch with the same depth and height as the mounting groove (41).

4. The pneumatic locking mechanism of claim 3, wherein: The elastic sleeve is a rubber sleeve.

5. The pneumatic locking mechanism of claim 3, wherein: The mounting base (1) is provided with a clearance groove (11) with a height smaller than that of the upper part of the piston (3) at the lower part of the shaft sleeve (2).

6. The pneumatic locking mechanism of claim 5, wherein: The shaft part of the shaft sleeve (2) is fixedly connected with a connecting base (24), and the connecting base (24) and the mounting base (1) are fixedly connected through bolts.

7. The pneumatic locking mechanism according to any one of claims 1-6, characterized in that: The lower end of the piston (3) is fixedly connected with a positioning table (31), the diameter of the positioning table (31) is greater than the lower end hole diameter of the shaft sleeve (2), the diameter of the positioning table (31) is equal to the outer diameter of the shaft sleeve (2), the positioning table (31) is provided with a third sealing groove (32), and the third sealing groove (32) is assembled with a sealing ring in sliding sealing connection with the clearance groove of the mounting base (1).

8. The pneumatic locking mechanism as claimed in claim 5, wherein: The size of the clearance groove of the mounting base (1) is the same as that of the positioning table (31).

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