Movable clamp type flat key dismounting device

Abstract

The utility model discloses a movable clamp type flat key dismounting device which is used for separating a flat key from a key groove of a positioning shaft and comprises a clamping assembly, a first movable part, a first fixed part, a second movable part, a second fixed part, a positioning plate and a jacking assembly. According to the movable clamp type flat key dismounting device, the flat key is clamped through the clamping assembly, and the overall length and width of the movable clamp type flat key dismounting device can be adjusted through the arrangement of the first movable part, the first fixed part, the second movable part, the second fixed part and the positioning plate so as to adapt to flat keys of different sizes and different positions. And the jacking assembly can provide vertical jacking force for the movable clamp type flat key dismounting device, so that the flat key is separated from the key groove of the positioning shaft. The movable clamp type flat key dismounting device can dismount the flat key without damaging the key groove, the flat key, the shaft, welding and drilling, and the problem that the flat key is clamped by the key groove due to slight deformation of the flat key or the key groove is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to a flat key dismounting field especially relates to a movable tongs type dismounting flat key device. BACKGROUND

[0002] The key is the key that relies on two side surfaces as the working surface, relies on the extrusion of the key and the key groove side surface to transmit the torque. The cooperation of the flat key and the key groove is a kind of cooperation of basic shaft system, and there are three kinds of cooperation types: relatively loose key connection, general key connection and relatively tight key connection. Among them, the relatively loose key connection is clearance fit, and the flat key width is slightly smaller than the key groove width. The general key connection and the relatively tight key connection are transition fit, and the flat key width is slightly larger than the key groove width.

[0003] Method one: the key groove has an opening, a suitable flat shovel is used, the angle of the flat shovel is adjusted according to the shape and position of the flat key, a certain oblique angle is formed between the flat shovel and the flat key surface, the contact area is increased, and the friction force during removal is reduced. Then the cutting edge of the flat shovel is aligned with the flat key, and the flat key is removed along the length direction of the flat key from one end. The disadvantages of the method are as follows: the flat key and the key groove are damaged, and the shaft may be damaged. If the flat key or the key groove opening is deformed, the flat key and the key groove will be damaged again, and the dismounting difficulty is further increased.

[0004] Method two: the key groove has no opening, a suitable and sharp flat shovel is used, the angle of the flat shovel is adjusted according to the shape and position of the flat key, a certain oblique angle is formed between the flat shovel and the bottom of the flat key, and the flat key is pried up along the length direction of the flat key and then taken out. The disadvantages of the method are as follows: the flat key and the key groove are damaged, and the shaft may be damaged. If the flat key or the key groove opening is deformed, the flat key and the key groove will be damaged again, and the dismounting difficulty is further increased.

[0005] Method three: a hole is drilled and a screw is screwed in the key in advance, then the flat key is pulled up and taken out. The disadvantages of the method are as follows: the flat key is damaged, and the strength of the flat key is reduced after drilling, so the flat key cannot be used continuously.

[0006] Method four: an anchor is welded on the surface of the flat key, then the flat key is pulled up and taken out. The disadvantages of the method are as follows: the flat key is damaged, and the anchor needs to be cut and the flat key surface needs to be polished after taking out, so the process is complex and the risk is high.

[0007] At present, there is lack of a device and a method that can dismount the flat key flexibly and efficiently without damaging the key groove, the flat key and the shaft, without welding and drilling. UTILITY MODEL CONTENTS

[0008] The utility model solves the technical problem and provides a movable tongs type dismounting flat key device.

[0009] The utility model discloses a movable tongs type dismounting flat key device which is used for separating the flat key from the key groove of the positioning shaft.

[0010] The clamping assembly is used for clamping the flat key.

[0011] The first movable piece is connected to the clamping assembly and the first fixed piece, and the position between the first movable piece and the first fixed piece is adjustable.

[0012] The second movable piece is connected to the clamping assembly and the second fixed piece, and the position between the second movable piece and the second fixed piece is adjustable.

[0013] The first fixed piece is connected to the second fixed piece, and the position between the first fixed piece and the second fixed piece is adjustable.

[0014] The second fixed piece is fixedly connected to the positioning plate, the jacking assembly is connected to the positioning plate, and the jacking assembly is used for providing vertical jacking force for the movable tongs type dismounting flat key device to separate the flat key from the key groove of the positioning shaft.

[0015] In some embodiments, the clamping assembly includes a first clamping block and a second clamping block, the first clamping block and the second clamping block are separately abutted on two sides of the flat key, the first clamping block is installed on the first movable piece, and the second clamping block is installed on the second movable piece.

[0016] In some embodiments, the first fixed piece includes a first fixed connecting portion and a first fixed connecting portion, the first fixed connecting portion is fixedly connected to the first fixed connecting portion, and the first fixed connecting portion is vertically arranged with the first fixed connecting portion.

[0017] A first movable sliding groove is formed in the first movable piece, and a first fixed sliding groove corresponding to the first movable sliding groove is formed in the first fixed connecting portion.

[0018] The movable tongs type dismounting flat key device further includes a first locking piece, the first locking piece is installed on the first movable sliding groove and the first fixed sliding groove, and is used for fixing the relative position of the first movable piece and the first fixed connecting portion.

[0019] In some embodiments, the second fixed piece includes a second fixed connecting portion and a second fixed connecting portion, the second fixed connecting portion is fixedly connected to the second fixed connecting portion, and the second fixed connecting portion is vertically arranged with the second fixed connecting portion.

[0020] The second movable piece is provided with a second movable sliding groove, and the second fixed connecting part is provided with a second fixed sliding groove corresponding to the second movable sliding groove;

[0021] The movable pliers type dismounting flat key device further comprises a second locking piece, which is installed on the second movable sliding groove and the second fixed sliding groove, and is used for fixing the relative position of the second movable piece and the second fixed connecting part.

[0022] In some embodiments, the first fixed connecting part is welded with the first fixed connecting part, or is integrally formed;

[0023] The second fixed connecting part is welded with the second fixed connecting part, or is integrally formed.

[0024] In some embodiments, the first fixed connecting part is provided with a first limiting through groove, and the second fixed connecting part is provided with a second limiting through groove corresponding to the first limiting through groove;

[0025] The movable pliers type dismounting flat key device further comprises a third locking piece, which is installed on the first limiting through groove and the second limiting through groove, and is used for fixing the relative position of the first fixed connecting part and the second fixed connecting part.

[0026] In some embodiments, the positioning plate is fixedly connected with the second fixed connecting part, and the positioning plate is vertically arranged with the second fixed connecting part.

[0027] In some embodiments, the positioning plate is provided with a positioning through groove, and the jacking assembly comprises a retaining piece and a jacking piece;

[0028] The retaining piece is fixedly installed on the positioning plate;

[0029] The jacking piece is in transmission connection with the retaining piece, and the jacking piece is arranged in the positioning through groove, and one end of the jacking piece abuts on the surface of the positioning shaft.

[0030] In some embodiments, the retaining piece is a fixed nut, the jacking piece is a screw rod, and the retaining piece is in threaded connection with the jacking piece.

[0031] In some embodiments, the first movable sliding groove, the first fixed sliding groove, the second movable sliding groove, the second fixed sliding groove, the first limiting through groove, the second limiting through groove and the positioning through groove are all provided with a tooth-shaped part.

[0032] The present invention offers the following advantages: The movable clamp-type key removal device clamps the key using a clamping assembly. Furthermore, the overall length and width of the device can be adjusted by the arrangement of the first movable component, the first fixed component, the second movable component, the second fixed component, and the positioning plate to accommodate keys of different sizes and positions. The lifting assembly provides a vertical lifting force to disengage the key from the keyway of the positioning shaft. This device removes the key without damaging the keyway, the key, or the shaft, without welding or drilling, avoiding the problem of the key getting stuck due to slight deformation of the key or keyway. Therefore, it ensures unit efficiency while reducing maintenance manpower and time costs. Attached Figure Description

[0033] To more clearly illustrate the technical solution of this utility model, the present utility model will be further described below in conjunction with the accompanying drawings and embodiments. It should be understood that the following drawings only show some embodiments of this utility model and should not be considered as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort. In the drawings:

[0034] Figure 1 This is a schematic diagram illustrating the application of the movable clamp-type disassembly key device and the positioning shaft in some embodiments of this utility model;

[0035] Figure 2 This is a schematic diagram of the overall structure of the movable clamp-type disassembly key device in some embodiments of this utility model. Detailed Implementation

[0036] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the orientations or positional relationships indicated by terms such as "front," "rear," "upper," "lower," "left," "right," "longitudinal," "horizontal," "vertical," "horizontal," "top," "bottom," "inner," "outer," "head," and "tail" are based on the orientations or positional relationships shown in the accompanying drawings, and are constructed and operated in a specific orientation. They are only for the convenience of describing this technical solution and do not indicate that the device or component referred to must have a specific orientation; therefore, they should not be construed as limitations on this utility model.

[0037] It should be noted that, unless otherwise explicitly specified and limited, the terms such as "mounting", "connecting", "connecting", "fixing", "arranging" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements or the interaction relationship between two elements. When an element is referred to as "on" or "below" another element, the element can be "directly" or "indirectly" above the other element, or one or more intervening elements can be present. The terms "first", "second", "third" and the like are only for the convenience of describing the technical solutions, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second", "third" and the like can be explicitly or implicitly include one or more of the features. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0038] Please refer to Figure 1 and Figure 2 The utility model discloses a movable tongs type dismounting flat key device for making flat key 81 separate from the key groove of positioning shaft 82, and the movable tongs type dismounting flat key device can be specifically used for dismounting flat key 81 on nuclear power plant pump shaft, speed reducer, power valve, gear box and other equipment. The general key connection and the relatively tight key connection of flat key 81 are transition fit, the width of flat key 81 is slightly greater than the width of the key groove, flat key 81 is installed into the key groove, and the inner wall of the key groove can exert a pair of horizontal forces on both sides of flat key 81 in the horizontal direction to fix flat key 81 and bear the torque effect. Under the action of the pair of horizontal forces, when dismounting flat key 81, flat key 81 needs to overcome the static friction force in the height direction of the key groove to move upward in the height direction of the key groove.

[0039] In the embodiment, the movable tongs type dismounting flat key device comprises a clamping assembly 1, a first movable piece 2, a first fixed piece 3, a second movable piece 4, a second fixed piece 5, a positioning plate 6 and a jacking assembly 7. The clamping assembly 1 is used for clamping flat key 81; the first movable piece 2 is connected to the clamping assembly 1 and the first fixed piece 3, and the position between the first movable piece 2 and the first fixed piece 3 is adjustable; the second movable piece 4 is connected to the clamping assembly 1 and the second fixed piece 5, and the position between the second movable piece 4 and the second fixed piece 5 is adjustable; the first fixed piece 3 is connected to the second fixed piece 5, and the position between the first fixed piece 3 and the second fixed piece 5 is adjustable; the second fixed piece 5 is fixedly connected to the positioning plate 6, and the jacking assembly 7 is connected to the positioning plate 6, and the jacking assembly 7 is used for providing a vertical jacking force for the movable tongs type dismounting flat key device, so that flat key 81 separates from the key groove of positioning shaft 82.

[0040] It can be understood that the movable tongs type dismounting flat key device clamps the flat key 81 through the clamping assembly 1, and through the setting of the first movable piece 2, the first fixed piece 3, the second movable piece 4, the second fixed piece 5 and the positioning plate 6, the length and width of the movable tongs type dismounting flat key device can be adjusted to adapt to flat keys 81 of different sizes and different positions. The jacking assembly 7 can provide vertical jacking force for the movable tongs type dismounting flat key device to make the flat key 81 separate from the key groove of the positioning shaft 82. The movable tongs type dismounting flat key device dismounts the flat key 81 without damaging the key groove, the flat key 81, the shaft, welding or drilling, avoiding the problem that the flat key 81 is stuck in the key groove due to slight deformation of the flat key 81 or the key groove. Thus, the unit efficiency can be ensured, and the maintenance manpower and time cost can be reduced.

[0041] As shown in Figure 2 The clamping assembly 1 includes a first clamping block 11 and a second clamping block 12, which abut on two sides of the flat key 81 respectively. The first clamping block 11 is installed on the first movable piece 2, and the second clamping block 12 is installed on the second movable piece 4. Both the first clamping block 11 and the second clamping block 12 can be made of PVC material, which can ensure the clamping force and will not damage the flat key 81 during clamping. The first clamping block 11 can be connected to the first movable piece 2 by bolts, and the second clamping block 12 can be connected to the second movable piece 4 by bolts.

[0042] In some embodiments, the first fixed piece 3 includes a first fixed connecting part 31 and a first fixed connecting part 32 fixedly connected with the first fixed connecting part 31. The first fixed connecting part 31 and the first fixed connecting part 32 are arranged vertically, and the first fixed piece 3 is generally L-shaped. A first movable sliding groove 21 is formed on the first movable piece 2, and a first fixed sliding groove 311 corresponding to the first movable sliding groove 21 is formed on the first fixed connecting part 31. The movable tongs type dismounting flat key device further includes a first locking piece 91 installed on the first movable sliding groove 21 and the first fixed sliding groove 311, and used for fixing the relative position of the first movable piece 2 and the first fixed connecting part 31. The first fixed piece 3 and the first movable piece 2 can be made of aluminum alloy, specifically a 5mm middle slot aluminum alloy plate. The first movable sliding groove 21 is arranged along the length direction of the first movable piece 2, the first fixed sliding groove 311 is arranged along the length direction of the first fixed connecting part 31, and the first locking piece 91 is a locking bolt. When the relative position of the first movable piece 2 and the first fixed connecting part 31 is adjusted, the first locking piece 91 can be used to fix the relative position of the first movable piece 2 and the first fixed connecting part 31.

[0043] The second fixing member 5 comprises a second fixing connecting portion 51 and a second fixing connecting portion 52 fixedly connected with the second fixing connecting portion 51, and the second fixing connecting portion 51 is vertically arranged with the second fixing connecting portion 52. The second fixing member 5 is generally arranged in an L shape. The second movable member 4 is provided with a second movable sliding groove 41, and the second fixing connecting portion 51 is provided with a second fixing sliding groove 511 corresponding to the second movable sliding groove 41. The movable clamp type disassembly flat key device further comprises a second locking member 92, which is installed on the second movable sliding groove 41 and the second fixing sliding groove 511, and is used to fix the relative position of the second movable member 4 and the second fixing connecting portion 51. Among them, the second fixing member 5 and the second movable member 4 can be made of aluminum alloy material, specifically a 5mm middle slot aluminum alloy plate. The second movable sliding groove 41 is arranged along the length direction of the second movable member 4, the second fixing sliding groove 511 is arranged along the length direction of the second fixing connecting portion 51, and the second locking member 92 is a locking bolt. When the relative position of the second movable member 4 and the second fixing connecting portion 51 is adjusted, the second locking member 92 can be used to fix the relative position of the second movable member 4 and the second fixing connecting portion 51.

[0044] The first fixing connecting portion 31 and the first fixing connecting portion 32 are welded or integrally formed to improve the stability of the connection between the first fixing connecting portion 31 and the first fixing connecting portion 32. The second fixing connecting portion 51 and the second fixing connecting portion 52 are welded or integrally formed to improve the stability of the connection between the second fixing connecting portion 51 and the second fixing connecting portion 52.

[0045] The first fixing connecting portion 32 is provided with a first limiting through groove 321, and the second fixing connecting portion 52 is provided with a second limiting through groove 521 corresponding to the first limiting through groove 321. The movable clamp type disassembly flat key device further comprises a third locking member 93, which is installed on the first limiting through groove 321 and the second limiting through groove 521, and is used to fix the relative position of the first fixing connecting portion 32 and the second fixing connecting portion 52. The third locking member 93 can be a locking bolt. When the relative position of the first fixing connecting portion 32 and the second fixing connecting portion 52 is adjusted, the third locking member 93 can be used to fix the relative position of the first fixing connecting portion 32 and the second fixing connecting portion 52.

[0046] Further, the positioning plate 6 is fixedly connected with the second fixing connecting portion 52, and the positioning plate 6 is vertically arranged with the second fixing connecting portion 52. Specifically, the positioning plate 6 and the second fixing connecting portion 52 can be connected by welding, and the positioning plate 6 can be made of 5mm aluminum alloy.

[0047] The positioning plate 6 is provided with a positioning through slot 61, and the jacking assembly 7 comprises a retaining member 71 and a jacking member 72. The retaining member 71 is fixedly installed on the positioning plate 6, the jacking member 72 is in transmission connection with the retaining member 71, the jacking member 72 penetrates through the positioning through slot 61, and one end of the jacking member 72 abuts against the surface of the positioning shaft 82. Specifically, the retaining member 71 is a fixed nut, the jacking member 72 is a screw rod, the retaining member 71 is in threaded connection with the jacking member 72, and the retaining member 71 is in welded connection with the positioning plate 6. Understandably, the jacking member 72 can be screwed downward into the retaining member 71, penetrate through the positioning through slot 61 and then abut against the surface of the positioning shaft 82. Since the retaining member 71 is in threaded connection with the jacking member 72, the rotating force is converted into the vertical jacking force of the movable pincer-type dismounting flat key device when the jacking member 72 is screwed downward, the movable pincer-type dismounting flat key device is jacked up together with the flat key 81, the flat key 81 is separated from the key groove, and the flat key 81 is removed. The positioning through slot 61 is arranged along the length direction of the jacking member 72, the position of the retaining member 71 relative to the positioning through slot 61 can be adjusted, the retaining member 71 is welded to the positioning plate 6 after the maximum stress point of the surface of the positioning shaft 82 is found. In other embodiments, the jacking member 72 can also be replaced by an electric, pneumatic or hydraulic device to increase the jacking force.

[0048] In addition, the first movable sliding groove 21, the first fixed sliding groove 311, the second movable sliding groove 41, the second fixed sliding groove 511, the first limiting through slot 321, the second limiting through slot 521 and the positioning through slot 61 are all provided with tooth-shaped portions. The tooth-shaped portions can be arranged on the inner sides of the first movable sliding groove 21, the first fixed sliding groove 311, the second movable sliding groove 41, the second fixed sliding groove 511, the first limiting through slot 321, the second limiting through slot 521 and the positioning through slot 61, and the tooth-shaped portions can be in meshing connection with gears. After the gears are installed, a power source can be connected for power transmission, so as to facilitate the adjustment of the overall length and width of the movable pincer-type dismounting flat key device.

[0049] It can be understood that the above embodiments only express the preferred embodiments of the present application, the description is more specific and detailed, but it cannot be understood as the limitation of the patent scope of the present application; it should be pointed out that, for ordinary skilled persons in the art, the above technical features can be freely combined without departing from the concept of the present application, and some deformations and improvements can be made, which all belong to the protection scope of the present application; therefore, any equivalent transformation and modification within the scope of the claims of the present application shall belong to the scope of the claims of the present application.

Claims

1. A movable tongs type dismounting flat key device for disengaging a flat key (81) from a key groove of a locating shaft (82), characterized in that, The device comprises a clamping assembly (1), a first movable part (2), a first fixed part (3), a second movable part (4), a second fixed part (5), a positioning plate (6) and a jacking assembly (7); The clamping assembly (1) is used for clamping the flat key (81); The first movable part (2) is connected to the clamping assembly (1) and the first fixed part (3), and the position between the first movable part (2) and the first fixed part (3) is adjustable; The second movable part (4) is connected to the clamping assembly (1) and the second fixed part (5), and the position between the second movable part (4) and the second fixed part (5) is adjustable; The first fixed part (3) is connected to the second fixed part (5), and the position between the first fixed part (3) and the second fixed part (5) is adjustable; The second fixed part (5) is fixedly connected to the positioning plate (6), and the jacking assembly (7) is connected to the positioning plate (6), and the jacking assembly (7) is used for providing a vertical jacking force for the movable tongs-type flat key dismounting device, so that the flat key (81) is separated from the key groove of the positioning shaft (82).

2. The removable split key device of claim 1, wherein, The clamping assembly (1) comprises a first clamping block (11) and a second clamping block (12), the first clamping block (11) and the second clamping block (12) are separately abutted on two sides of the flat key (81), the first clamping block (11) is installed on the first movable part (2), and the second clamping block (12) is installed on the second movable part (4).

3. The removable split key device of claim 2, wherein, The first fixed part (3) comprises a first fixed connecting part (31) and a first fixed connecting part (32) fixedly connected with the first fixed connecting part (31), and the first fixed connecting part (31) and the first fixed connecting part (32) are vertically arranged; A first movable sliding groove (21) is formed in the first movable part (2), and a first fixed sliding groove (311) corresponding to the first movable sliding groove (21) is formed in the first fixed connecting part (31); The movable tongs-type flat key dismounting device further comprises a first locking part (91), the first locking part (91) is installed on the first movable sliding groove (21) and the first fixed sliding groove (311), and is used for fixing the relative position of the first movable part (2) and the first fixed connecting part (31).

4. The removable split key device of claim 3, wherein, The second fixed part (5) comprises a second fixed connecting part (51) and a second fixed connecting part (52) fixedly connected with the second fixed connecting part (51), and the second fixed connecting part (51) and the second fixed connecting part (52) are vertically arranged; A second movable sliding groove (41) is formed in the second movable part (4), and a second fixed sliding groove (511) corresponding to the second movable sliding groove (41) is formed in the second fixed connecting part (51); The movable clamp type disassembly flat key device further comprises a second locking member (92) installed on the second movable sliding groove (41) and the second fixed sliding groove (511) and used for fixing the relative position of the second movable member (4) and the second fixed connecting part (51).

5. The removable split key device of claim 4, wherein, The first fixed connecting part (31) and the first fixed connecting part (32) are welded or integrally formed. The second fixed connecting part (51) and the second fixed connecting part (52) are welded or integrally formed.

6. The removable split key device of claim 4, wherein, The first fixed connecting part (32) is provided with a first limiting through groove (321), and the second fixed connecting part (52) is provided with a second limiting through groove (521) corresponding to the first limiting through groove (321). The movable clamp type disassembly flat key device further comprises a third locking member (93) installed on the first limiting through groove (321) and the second limiting through groove (521) and used for fixing the relative position of the first fixed connecting part (32) and the second fixed connecting part (52).

7. The removable split key device of claim 6, wherein, The positioning plate (6) is fixedly connected with the second fixed connecting part (52), and the positioning plate (6) and the second fixed connecting part (52) are vertically arranged.

8. The removable split key device of claim 6, wherein, The positioning plate (6) is provided with a positioning through groove (61), and the jacking assembly (7) comprises a fixing member (71) and a jacking member (72). The fixing member (71) is fixedly installed on the positioning plate (6). The jacking member (72) is in transmission connection with the fixing member (71), and the jacking member (72) is arranged in the positioning through groove (61), and one end of the jacking member (72) abuts against the surface of the positioning shaft (82).

9. The removable split key device of claim 8, wherein, The fixing member (71) is a fixed nut, the jacking member (72) is a screw rod, and the fixing member (71) and the jacking member (72) are in threaded connection.

10. The removable split key device of claim 8, wherein, The first movable sliding groove (21), the first fixed sliding groove (311), the second movable sliding groove (41), the second fixed sliding groove (511), the first limiting through groove (321), the second limiting through groove (521) and the positioning through groove (61) are all provided with toothed portions.

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