CN216991775U - Clearance adjustment instrument - Google Patents

Abstract

The application provides a clearance adjusting tool, which belongs to the technical field of nuclear power equipment debugging and is used for adjusting the distance between a rotating speed sensor and the bottom of a tooth socket groove of a main pump shaft, and the clearance adjusting tool comprises an adjusting piece and a connecting piece; the adjusting piece is used for being inserted between the rotating speed sensor and the tooth socket, the adjusting piece is provided with a first adjusting surface and a second adjusting surface which are arranged in a back-to-back mode, the distance between the first adjusting surface and the second adjusting surface is a preset distance, the first adjusting surface is used for abutting against the rotating speed sensor, and the second adjusting surface is used for abutting against the bottom of the tooth socket; the connecting piece is connected with the adjusting piece, and the connecting piece can be used for holding. The technical problems that in the prior art, the process is complex and the working efficiency is low when the gap between the tooth groove bottoms of the rotating speed sensor and the main pump shaft is adjusted are solved.

Description

Clearance adjustment instrument

Technical Field

The application belongs to the technical field of nuclear power equipment debugging, and particularly relates to a clearance adjustment tool.

Background

The main pump is a heart part in the nuclear power station, and whether the main pump normally operates or not is related to the safety and normal operation of the nuclear power station. The rotating speed is an important index for marking the running state of the main pump, and can directly reflect the running condition of the main pump. The nuclear power station adopts magnetoelectric speed sensor to detect the main pump rotational speed usually, and under the normal condition, the clearance between the main pump axle of sensor (speed sensor) and main pump needs to be fixed, and too big clearance can cause the signal to weaken, and the clearance too little can lead to sensor and main pump axle to bump, influences the nuclear power station security.

During debugging and maintenance of the nuclear power nuclear island, the rotating speed sensor of the main pump needs to be dismounted and debugged. A plurality of ring teeth extending towards the direction far away from the main pump shaft are arranged on the main pump shaft, the plurality of ring teeth are spaced and are connected to the periphery of the main pump shaft in a surrounding manner to form a tooth ring, a tooth socket is formed between the two ring teeth, and the bottom of the tooth socket is an arc surface taking the central axis of the main pump shaft as the central axis; the main pump rotor cover is established in the outside of main pump shaft, and speed sensor installs on the main pump rotor, and during the debugging, speed sensor is located the tooth's socket outside and need just to the tooth's socket.

In the conventional operation process, the debugging needs to be carried out by a matching person by turning the main pump rotor manually, namely, the main pump rotor is rotated to align the rotating speed sensor arranged on the main pump rotor with the tooth socket between two adjacent ring teeth on the main pump shaft, and then the gap between the rotating speed sensor and the bottom of the tooth socket is manually adjusted. In the prior art, the rotating speed sensor is manually pushed during gap adjustment, then measurement is carried out through the measuring scale, the adjustment process needs to be repeatedly adjusted, moved and measured, the adjustment process is complicated, and the working efficiency is low.

SUMMERY OF THE UTILITY MODEL

An object of the application is to provide a clearance adjustment instrument, aim at solving among the prior art the technical problem that the process is loaded down with trivial details and work efficiency is low when adjusting the tooth's socket tank bottom clearance of speed sensor and main pump shaft.

An object of the application is to provide a clearance adjustment instrument for adjust the interval between the tooth's socket tank bottom of speed sensor and main pump shaft, its characterized in that includes:

the adjusting piece is used for being inserted between the rotating speed sensor and the tooth socket, the adjusting piece is provided with a first adjusting surface and a second adjusting surface which are arranged in a back-to-back mode, the distance between the first adjusting surface and the second adjusting surface is a preset distance, the first adjusting surface is used for abutting against the rotating speed sensor, and the second adjusting surface is used for abutting against the bottom of the tooth socket; and

and the connecting piece is connected with the adjusting piece and can be used for holding.

Furthermore, the first adjusting surface and the second adjusting surface are coaxial circular arc surfaces, the corresponding central axes of the first adjusting surface and the second adjusting surface are the central axes of the main pump shaft, and the radian of the second adjusting surface is consistent with that of the groove bottom.

Furtherly, the adjusting part still has the first spacing face and the spacing face of second that set up dorsad, first adjusting face, first spacing face, second adjusting face and the spacing face of second is connected in order and is enclosed jointly and establish the formation ring-type, first spacing face with the second is spacing to be personally submitted and to predetermine the contained angle setting, first spacing face with the spacing face of second is used for corresponding the butt respectively with the both sides cell wall of tooth's socket.

Furthermore, the adjusting piece is provided with an inserting end and a connecting end, a limiting structure is convexly arranged on the connecting end of the adjusting piece, and the limiting structure is used for being abutted against the end face of the main pump shaft when the adjusting piece enters the tooth socket.

Furthermore, the limiting structure is convexly arranged on the second adjusting surface.

Further, the adjusting piece comprises a first adjusting body and a second adjusting body, the first adjusting surface is arranged on the first adjusting body, the second adjusting surface is arranged on the second adjusting body, and the first adjusting body is connected with the second adjusting body through a lifting mechanism, so that the first adjusting body and the second adjusting body can move relatively, and the preset distance between the first adjusting surface and the second adjusting surface is adjustable.

Further, the lifting mechanism comprises a scissor-type lifting structure.

Furthermore, the lifting mechanism further comprises a driving structure, and the driving structure is connected with the scissor type lifting structure so as to drive the scissor type lifting structure to stretch and deform.

Furthermore, the connecting piece comprises a connecting arm and a connecting cylinder body, one end of the connecting arm is connected with the adjusting piece, and the other end of the connecting arm is connected with the connecting cylinder body; the central axis of the connecting cylinder body is perpendicular to the central axis of the connecting arm.

Furthermore, a sleeve body is arranged outside the connecting cylinder body, and the sleeve body is made of elastic materials.

Compared with the prior art, the beneficial effects of the application are that: compared with the prior art, this clearance adjustment instrument can with the adjusting part peg graft into the tooth's socket fast in, through making first regulation face top connect at speed sensor's response face, thereby make speed sensor reach apart from the main pump axle height of predetermineeing, and then reach the purpose of quick adjustment speed sensor position height, adjust accomplish the back, it can to grip the connecting piece and take out the adjusting part from the tooth's socket, then can repeat above-mentioned step again and adjust other speed sensor apart from the main pump axle the height can, whole accommodation process is quick, it is convenient, be favorable to improving work efficiency.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required to be used in the embodiments of the present application or in the description of the prior art will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a gap adjustment tool according to an embodiment of the present disclosure;

FIG. 2 is a left side view of FIG. 1;

FIG. 3 is a right side view of FIG. 1;

FIG. 4 is a first schematic view illustrating a first usage state of a gap adjustment tool according to an embodiment of the present disclosure;

fig. 5 is a schematic view illustrating a second usage state of a gap adjustment tool according to an embodiment of the present disclosure;

fig. 6 is a schematic view of the structure of the adjusting member of fig. 1.

Description of reference numerals: 1. an adjustment member; 11. a first adjusting surface; 12. a second adjusting surface; 13. a first limiting surface; 14. a second limiting surface; 15. a first tuning body; 16. a second tuning body; 17. a lifting mechanism; 18. a drive structure; 181. a driver; 182. a telescopic rod; 2. a connecting member; 21. a connecting arm; 22. connecting the cylinder body; 3. a limiting structure; 4. a main pump shaft; 5. ring teeth; 51. a tooth socket; 52. the bottom of the tank; 6. a rotational speed sensor; 61. a sensing surface; 7. connecting a bracket; 8. fixing a nut; 9. fixing a bracket; 10. and connecting the cable.

Detailed Description

Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present application and should not be construed as limiting the present application.

In the description of the present application, it is to be understood that the terms "length," "width," "upper," "lower," "upward," "vertical," "horizontal," "bottom," "inner," "outer," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings, which are based on the orientations and positional relationships indicated in the drawings, and are used for convenience in describing the present application and for simplicity in description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the present application.

Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments.

Referring to fig. 1 to 4, an object of the present embodiment is to provide a clearance adjustment tool, configured to adjust a distance between a rotation speed sensor 6 and a groove bottom 52 of a groove 51 of a main pump shaft 4, where the clearance adjustment tool includes an adjustment member 1 and a connection member 2, the adjustment member 1 is configured to be inserted between the rotation speed sensor 6 and the groove 51, the adjustment member 1 has a first adjustment surface 11 and a second adjustment surface 12 that are arranged in a back-to-back (reverse-away) manner, a distance between the first adjustment surface 11 and the second adjustment surface 12 is a preset distance, the first adjustment surface 11 is configured to be abutted by the rotation speed sensor 6, and the second adjustment surface 12 is configured to be abutted by the groove bottom 52 of the groove 51; the connecting element 2 is connected to the adjusting element 1, the connecting element 2 being able to be used for gripping or the connecting element 2 being used for connecting to an external drive element.

It should be noted that the main pump shaft 4 and the rotation speed sensor 6 in the nuclear power system are structurally characterized in that the main pump shaft 4 is a cylinder with a circular cross section and an outer contour, the main pump shaft 4 is provided with a plurality of ring teeth 5 extending in a direction away from the main pump shaft 4, the plurality of ring teeth 5 are spaced and connected to the periphery of the main pump shaft 4 in a surrounding manner to form a tooth ring, a tooth socket 51 is formed between the two ring teeth 5, and a groove bottom 52 of the tooth socket 51 is an arc surface taking a central axis of the main pump shaft 4 as a central axis; main pump rotor cover is established in the outside of main pump shaft 4, speed sensor 6 is through installing on the main pump rotor, and during the debugging, speed sensor 6 is located tooth's socket 51 outside and needs just to tooth's socket 51, specifically, speed sensor 6 passes through fixation nut 8 and installs on linking bridge 7, linking bridge 7 is connected on fixed bolster 9, fixed bolster 9 is immovable, linking bridge 7 can drive rotation sensor and move towards the direction of keeping away from or being close to main pump shaft 4 on fixed bolster 9, speed sensor 6 passes through connecting cable 10 and is connected with external controller.

Specifically, the adjusting member 1 is in a rectangular cylinder shape, the outer circumference of the adjusting member 1 is provided with four side surfaces, wherein any two oppositely arranged surfaces of the four side surfaces are a first adjusting surface 11 and a second adjusting surface 12 respectively, and a preset distance between the first adjusting surface 11 and the second adjusting surface 12 is used for adjusting the distance between the rotation speed sensor 6 and the groove bottom 52 of the tooth socket 51; the connecting piece 2 is extended in a columnar shape, and one end of the connecting piece 2 is connected to the end face of one end of the adjusting piece 1.

When the adjusting device is used, referring to fig. 4 and 5, an operator can hold the connecting piece 2 by hand, so that the adjusting piece 1 is inserted into the tooth groove 51, the first adjusting surface 11 of the adjusting piece 1 is in contact (butt joint) with the sensing surface 61 of the rotating speed sensor 6, and the second adjusting surface 12 is in contact (butt joint) with the groove bottom 52 of the tooth groove 51, so that the distance between the sensing surface 61 of the rotating speed sensor 6 and the groove bottom 52 reaches a preset distance, and further the rotating speed sensor 6 is at a preset height from the main pump shaft 4, so that the optimal distance and the sensing sensitivity of the rotating speed sensor 6 are achieved.

In this embodiment, this clearance adjustment instrument can be pegged graft into tooth's socket 51 fast with adjusting part 1 in, connect at speed sensor 6's response face 61 through making first regulation face top, thereby make speed sensor 6 reach apart from main pump shaft 4 predetermined height, and then reach the purpose of quick adjustment speed sensor 6 position height, adjust the completion back, it can to grip connecting piece 2 and take out adjusting part 1 from tooth's socket 51, then can repeat above-mentioned step again other speed sensor 6 apart from main pump shaft 4 the height can, whole accommodation process is quick, it is convenient, be favorable to improving work efficiency.

In one embodiment, as shown with reference to FIGS. 1-3, the first adjustment surface 11 and the second adjustment surface 12 may be planar; or, the first adjusting surface 11 is an arc surface, the central axis of the first adjusting surface 11 is coaxially arranged with the central axis of the main pump shaft 4, the second adjusting surface 12 is a plane or an arc surface, and when the second adjusting surface 12 is an arc surface, the central axis of the second adjusting surface 12 is coaxially arranged with the central axis of the main pump shaft 4, that is, the first adjusting surface 11 and the second adjusting surface 12 are coaxial circular arc surfaces.

When the first adjusting surface 11 and the second adjusting surface 12 are both arc surfaces, the first adjusting surface 11 and the second adjusting surface 12 are coaxial arc surfaces taking the central axis of the main pump shaft 4 as the central axis, the radian of the second adjusting surface 12 is consistent with the radian of the groove bottom 52, and the second adjusting surface 12 is consistent with the radian of the groove bottom 52 surface (the groove bottom 52) of the groove bottom 51, so that the second adjusting surface 12 and the groove bottom 52 surface of the groove bottom 51 can be in seamless fit as much as possible, the matching and positioning of the adjusting piece 1 and the groove bottom 51 are more accurate, and the distance between the rotating speed sensor 6 and the groove bottom 52 of the groove bottom 51 is more accurate in adjustment; in addition, the first adjusting surface 11 is a cambered surface, and when the distance is adjusted, the sensing surface 61 of the rotation speed sensor 6 can abut against the highest point of the first adjusting surface 11, that is, the abutting position of the sensing surface 61 of the rotation speed sensor 6 can be tangent to the first adjusting surface 11, and then the circumferential position of the rotation speed sensor 6 can be controlled through the first adjusting surface 11, so that the adjustment is more accurate.

In one embodiment, referring to fig. 2 and 3, the adjusting member 1 further has a first limiting surface 13 and a second limiting surface 14 disposed oppositely, the first adjusting surface 11, the first limiting surface 13, the second adjusting surface 12 and the second limiting surface 14 are sequentially connected and jointly enclosed to form a ring shape, the first limiting surface 13 and the second limiting surface 14 are disposed at a predetermined included angle, and the first limiting surface 13 and the second limiting surface 14 are used for correspondingly abutting against two side groove walls of the tooth socket 51, respectively.

Specifically, the adjusting member 1 is in a rectangular cylinder shape, four side surfaces are arranged on the outer periphery of the adjusting member 1, the four side surfaces are a first adjusting surface 11, a first limiting surface 13, a second adjusting surface 12 and a second limiting surface 14 in sequence, two surfaces which are arranged in an opposite direction are the first adjusting surface 11 and the second adjusting surface 12 respectively, so that the other two surfaces which are arranged in an opposite direction are the first limiting surface 13 and the second limiting surface 14, and because a plurality of ring teeth 5 which are distributed at intervals outside the main pump shaft 4 form a toothed ring, the side wall of the toothed groove 51 between the two ring teeth 5 is along the diameter direction of the main pump shaft 4, so a certain included angle is formed between the two side groove walls of the toothed groove 51, and the preset included angle between the first limiting surface 13 and the second limiting surface 14 of the adjusting member 1 is designed to be the same as the included angle between the two side groove walls of the toothed groove 51.

In the present embodiment, by making the predetermined angle between the first stopper surface 13 and the second stopper surface 14 identical to the angle between the groove walls of the tooth grooves 51 at both sides, and the first limiting surface 13 and the second limiting surface 14 are respectively abutted against the groove walls at two sides of the tooth groove 51, so that the first limiting surface 13 and the second limiting surface 14 play a limiting role on the whole, the adjusting body can be accurately inserted into the tooth groove 51, and the second adjusting surface 12 can accurately abut against the groove bottom 52 of the tooth groove 51, at this time, the adjusting rotation speed sensor 6 is tangent to the first adjusting surface 11, so that the rotation speed sensor 6 can be positioned at the middle of the gullet 51 in the width direction, and so that the sensing surface 61 of the rotation speed sensor 6 is spaced a predetermined distance from the main pump shaft 4, and then reach the purpose of accurate adjustment speed sensor 6's high position, the adjustment process is quick, convenient, is favorable to improving work efficiency.

In one embodiment, referring to fig. 2 and 3, the adjusting member 1 has an insertion end and a connection end, and the adjusting member 1 is provided with a protruding limiting structure 3 at the connection end, that is, the connection end of the adjusting member 1 away from the insertion end is provided with a protruding limiting structure 3, and the protruding limiting structure 3 is used for abutting against the end surface of the main pump shaft 4 when the insertion end of the adjusting member 1 enters the tooth space 51.

Specifically, the adjusting member 1 is a cylindrical body, one end of the adjusting member 1 is inserted into the tooth socket 51, which is defined as an insertion end of the adjusting member 1, and the limiting structure 3 is connected to the other end opposite to the insertion end and extends in a direction away from the central axis of the adjusting member 1. The limiting structure 3 can be a limiting block which is convexly arranged at the other end of the adjusting part 1, and the limiting block is a block body.

In the embodiment, after the insertion end of the adjusting member 1 is inserted into the tooth space 51 for a certain distance, the side surface of the limiting structure 3 can abut against the end surface of the main pump shaft 4 outside the tooth space 51, so that the adjusting member 1 is prevented from moving into the tooth space 51 continuously, and the limiting structure 3 plays a role in limiting and positioning the movement of the adjusting member 1 in the process of adjusting the clearance, so that an operator can better control the clearance adjusting tool in the adjusting process.

Furthermore, the limiting structure 3 is convexly arranged on the second adjusting surface 12. Because this clearance adjustment instrument is when using, second adjustment face 12 is closer to the axis position of main pump shaft 4, so with protruding second adjustment face 12 of locating of limit structure 3, during the use, limit structure 3 can be closer to and point to the centre of a circle of 4 terminal surfaces of main pump shaft, is favorable to the direction of use of this clearance adjustment instrument of better definite, and it is more convenient to use.

In one embodiment, referring to fig. 6, the adjusting member 1 includes a first adjusting body 15 and a second adjusting body 16, the first adjusting body 15 is disposed on the first adjusting body 11, the second adjusting body 16 is disposed on the second adjusting body 12, and the first adjusting body 15 and the second adjusting body 16 are connected by a lifting mechanism 17, so that the first adjusting body 15 and the second adjusting body 16 can move relatively, and the preset distance between the first adjusting body 11 and the second adjusting body 12 can be adjusted.

Specifically, the first adjusting body 15 and the second adjusting body 16 are block-shaped bodies which are arranged oppositely, as shown in fig. 3, the upper surface of the first adjusting body 15 is a first adjusting surface 11, the lower surface of the second adjusting body 16 is a second adjusting surface 12, and the lifting mechanism 17 is connected between the lower surface of the first adjusting body 15 and the upper surface of the second adjusting body 16, so that the first adjusting body 15 and the second adjusting body 16 can move relatively, and the purpose of adjusting the preset distance between the first adjusting surface 11 and the second adjusting surface 12 is achieved. The lifting mechanism 17 may be a screw mechanism, an expansion rod 182 mechanism or a scissor-type lifting mechanism, but not limited thereto, and may be a mechanism capable of adjusting the relative distance between the first adjusting body 15 and the second adjusting body 16.

Further, the lifting mechanism 17 comprises a scissor type lifting structure, the scissor type lifting structure comprises a first scissor arm and a second scissor arm, the first scissor arm and the second scissor arm are arranged in a crossed manner and are hinged at the crossed position, the upper end of the first scissor arm is hinged with the first adjusting body 15 and can slide relative to the first adjusting body 15 at a hinge point, and similarly, the lower end of the first scissor arm is hinged with the second adjusting body 16 and can slide relative to the second adjusting body 16 at the hinge point; correspondingly, the upper end of the second scissor arm is hinged with the first adjusting body 15, and similarly, the lower end of the second scissor arm is hinged with the second adjusting body 16; the first scissor arm and the second scissor arm rotate relative to each other at a hinge point, so that the distance between the first adjusting body 15 and the second adjusting body 16 can be adjusted.

In the present embodiment, the adjustment member 1 is designed to be height-adjustable, that is, the preset distance between the first adjustment surface 11 and the second adjustment surface 12 of the adjustment member 1 is adjustable, so that the gap adjustment tool can adjust the height positions of the rotation speed sensors 6 with different height requirements, and the applicability is wider.

In one embodiment, referring to fig. 6, the lifting mechanism 17 further comprises a driving structure 18, and the driving structure 18 is connected with the scissor type lifting structure to drive the scissor type lifting structure to deform telescopically.

Specifically, the driving structure 18 includes a driver 181 and a telescopic rod 182, the driver 181 may be a motor, and the driver 181 is connected with the telescopic rod 182 to drive the telescopic rod 182 to extend and retract; the extending end of the telescoping rod 182 is connected to the lower end of the first scissor arm to push the lower end of the first scissor arm to move on the second tuning body 16, thereby allowing the first scissor arm and the second scissor arm to rotate at the hinge point to adjust the distance between the first tuning body 15 and the second tuning body 16.

In this embodiment, by adding the driving structure 18, the degree of mechanization of the distance adjustment between the first adjusting body 15 and the second adjusting body 16 is higher, the adjustment is more convenient, and the improvement of the working efficiency is facilitated.

In one embodiment, referring to fig. 1 and 3, the connecting member 2 comprises a connecting arm 21 and a connecting cylinder 22, one end of the connecting arm 21 is connected with the adjusting member 1, and the other end of the connecting arm 21 is connected with the connecting cylinder 22; the central axis of the connecting cylinder 22 is perpendicular to the central axis of the connecting arm 21.

In this embodiment, the connecting arm 21 may be a rod, one end of the connecting arm 21 is connected to the other end opposite to the insertion end of the adjusting member 1, the connecting cylinder 22 may be made of a cylinder having a circular cross-sectional outer shape, and the connecting cylinder 22 is mainly used for an operator to grasp and use, so that the gap adjustment tool is more convenient to use.

In one embodiment, the connecting cylinder 22 is provided with a sheath body on the outside, and the sheath body is made of elastic material. The cover body can be made of rubber, silica gel and other materials, and the cover body is mainly used for improving the comfort level of an operator in the using process.

The foregoing is considered as illustrative only of the preferred embodiments of the invention, and is presented only for the purpose of illustrating the principles of the invention and not in any way to limit its scope. Any modifications, equivalents and improvements made within the spirit and principles of the present application and other embodiments of the present application without the exercise of inventive faculty will occur to those skilled in the art and are intended to be included within the scope of the present application.

Claims (10)

1. A clearance adjustment tool for adjusting the spacing between a speed sensor and the bottom of a gullet slot of a primary pump shaft, comprising:

the adjusting piece is used for being inserted between the rotating speed sensor and the tooth socket, the adjusting piece is provided with a first adjusting surface and a second adjusting surface which are arranged in a back-to-back mode, the distance between the first adjusting surface and the second adjusting surface is a preset distance, the first adjusting surface is used for abutting against the rotating speed sensor, and the second adjusting surface is used for abutting against the bottom of the tooth socket; and

and the connecting piece is connected with the adjusting piece and can be used for holding.

2. The clearance adjustment tool of claim 1, wherein the first adjustment surface and the second adjustment surface are coaxial circular arc surfaces, and the central axis of the first adjustment surface and the second adjustment surface corresponds to the central axis of the main pump shaft, and the radian of the second adjustment surface is consistent with the radian of the groove bottom.

3. The clearance adjusting tool according to claim 2, wherein the adjusting member further has a first limiting surface and a second limiting surface which are oppositely arranged, the first adjusting surface, the first limiting surface, the second adjusting surface and the second limiting surface are sequentially connected and jointly enclosed to form a ring shape, the first limiting surface and the second limiting surface are arranged at a preset included angle, and the first limiting surface and the second limiting surface are respectively and correspondingly abutted against the two side groove walls of the tooth socket.

4. The clearance adjustment tool according to claim 2 or 3, wherein the adjustment member has an insertion end and a connection end, and the adjustment member is provided with a stopper protruding from the connection end, and the stopper is configured to abut against an end surface of the main pump shaft when the adjustment member enters the spline.

5. The clearance adjustment tool of claim 4, wherein the stop structure is raised from the second adjustment surface.

6. A gap adjusting tool as claimed in any one of claims 1 to 3, wherein the adjusting member comprises a first adjusting body and a second adjusting body, the first adjusting surface is provided on the first adjusting body, the second adjusting surface is provided on the second adjusting body, and the first adjusting body and the second adjusting body are connected by a lifting mechanism, so that the first adjusting body and the second adjusting body can move relatively, and the predetermined distance between the first adjusting surface and the second adjusting surface can be adjusted.

7. A tool as claimed in claim 6, wherein the lifting mechanism comprises a scissor lift arrangement.

8. A tool as claimed in claim 7, wherein the lifting mechanism further comprises a drive structure connected to the scissor lift structure to drive the scissor lift structure to telescopically deform.

9. A tool for gap adjustment as set forth in any one of claims 1-3, wherein said connecting member comprises a connecting arm and a connecting cylinder, one end of said connecting arm being connected to said adjusting member and the other end of said connecting arm being connected to said connecting cylinder; the central axis of the connecting cylinder body is perpendicular to the central axis of the connecting arm.

10. The gap adjustment tool as claimed in claim 9, wherein a sleeve body is provided on the outside of the connection cylinder body, and the sleeve body is made of an elastic material.

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