Tool for installing gear shaft pin for gear pump

Abstract

The utility model belongs to the technical field of gear pumps, and particularly relates to a tool for installing a gear shaft pin for a gear pump. The bulge is coupled to the tool base, and a hole position for mounting a ceramic shaft is formed in the bulge; a center shaft is coupled to the middle of the protrusion, the protrusion is matched with a groove structure in the middle of the pump body, and a center shaft hole is formed in the middle of the groove and is in sliding fit with the center shaft; the pressing structure is arranged on one side of the hole site, and after the ceramic shaft is inserted into the hole site, the pressing structure is used for fixing the ceramic shaft and the protrusion; a ceramic shaft hole used for being fixedly connected with a ceramic shaft is formed in the open groove. And the guiding and limiting structure is installed on the tool base, the guiding and limiting structure is in sliding fit with the pump body in the axis direction of the pump body, and the guiding and limiting structure is in radial limiting fit with the pump body. The guide limiting structure is in radial limiting fit with the pump body, rotation can be avoided, the ceramic shaft is accurately inserted into the ceramic shaft hole, and installation damage caused by inclination of the ceramic shaft is prevented.

Description

TECHNICAL FIELD

[0001] The utility model belongs to gear pump technical field, especially relate to a tool for installing gear shaft pin of gear pump. BACKGROUND

[0002] The existing assembly scheme is that the ceramic shaft pin is manually placed into the body and is compressed by the bench vice, but the ceramic shaft pin may be inclined when installing the ceramic shaft pin, which causes the ceramic shaft pin and the pump body to be scrapped. Therefore, a tool for installing gear shaft pin of gear pump is urgently needed to solve the problem. UTILITY MODEL CONTENTS

[0003] The utility model aims at providing a tool for installing gear shaft pin of gear pump to solve the above problems.

[0004] To achieve the above object, the utility model provides the following scheme:

[0005] A tool for installing gear shaft pin of gear pump, comprising:

[0006] A tool base;

[0007] A protrusion is connected to the tool base, and a hole for installing a ceramic shaft is formed in the protrusion; a central shaft is connected to the middle of the protrusion, the protrusion is matched with a slotted structure in the middle of the pump body, a central shaft hole is formed in the middle of the slot, and the central shaft hole is slidably connected to the central shaft;

[0008] A compression structure is arranged on one side of the hole, and after the ceramic shaft is inserted into the hole, the compression structure is used to fix the ceramic shaft and the protrusion;

[0009] A ceramic shaft hole for fixing the ceramic shaft is formed in the slot;

[0010] A guide limiting structure is installed on the tool base, the guide limiting structure is slidably connected to the pump body along the axis of the pump body, and the guide limiting structure is radially limited to the pump body.

[0011] Optionally, the guide limiting structure comprises a plurality of guide columns, the guide columns are fixed to the tool base, the guide columns are circumferentially arranged on the tool base, the guide columns are slidably connected to guide shaft holes, and the guide shaft holes are formed in the pump body.

[0012] Optionally, the guide columns are four, and the guide columns are circumferentially and equally spaced.

[0013] Optionally, the ceramic shaft is in interference fit with the ceramic shaft hole.

[0014] Optionally, the compression structure comprises:

[0015] A channel is arranged on the protrusion, and the channel is arranged on one side of the hole position and communicates with the hole position;

[0016] A ball is movably arranged in the channel, the ball abuts against the side wall of the ceramic shaft, and the end of the channel is limitedly matched with the ball;

[0017] An elastic part has one end abutting against the ball;

[0018] A spring mounting part is fixedly connected with the channel, and the other end of the elastic part is connected with the spring mounting part.

[0019] Optionally, the elastic part comprises a spring, one end of the spring abuts against the ball, and the other end of the spring is connected with the spring mounting part.

[0020] Optionally, the spring mounting part comprises a jackscrew, the jackscrew is fixedly arranged in the channel, and one end of the jackscrew abuts against the other end of the spring away from the ball.

[0021] Optionally, the jackscrew is provided with external threads, the channel is provided with internal threads, and the jackscrew is fixedly connected with the channel through thread cooperation.

[0022] Compared with the prior art, the utility model has the advantages and technical effects that:

[0023] In use, the ceramic shaft is installed in the hole position through the compression structure, the compression structure fixes the ceramic shaft and the protrusion, then the guide limiting structure is slid along the pump body, a pressing device such as a bench clamp is used to push the tool base to the pump body, the protrusion is inserted into the slot in the middle of the pump body, the ceramic shaft is accurately inserted into the ceramic shaft hole in the slot under the cooperation of the guide limiting structure and the pump body, and the ceramic shaft hole is fixed with the ceramic shaft, and the installation of the ceramic shaft is completed. The guide limiting structure is limited in the radial direction of the pump body, so that the guide limiting structure is prevented from rotating when sliding along the axis of the pump body, the ceramic shaft is accurately inserted into the ceramic shaft hole, and the installation damage caused by the inclination of the ceramic shaft is prevented. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed in the embodiments will be briefly introduced below, and obviously, the drawings in the following description can only be some embodiments of the utility model, and other drawings can also be obtained by those skilled in the art without creative labor under the premise of not paying the creative labor:

[0025] Figure 1 It is a structural schematic view of the utility model;

[0026] Figure 2 is a bottom view of the pump body structure of the utility model;

[0027] Figure 3 is a top view of the tool base of the utility model;

[0028] Figure 4 is a structure sectional view of the utility model;

[0029] Figure 5 is the utility model Figure 4 is a local enlarged view of A in the middle;

[0030] 1, tool base; 2, guide column; 3, ceramic shaft; 4, protrusion; 5, compression structure; 6, center shaft; 7, pump body; 8, slot; 9, guide shaft hole; 10, ceramic shaft hole; 11, center shaft hole; 12, ball; 13, spring; 14, jackscrew. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the utility model will be described clearly and completely below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0032] In order to make the above-mentioned purposes, features and advantages of the utility model more apparent, obvious and easy to understand, the utility model will be described in further detail below with reference to the drawings and specific embodiments.

[0033] With reference to Figures 1 to 5 The utility model discloses a kind of tool for installing gear shaft pin to gear pump, comprising:

[0034] Tool base 1;

[0035] Protrusion 4 is connected on tool base 1, and hole position for installing ceramic shaft 3 is formed in protrusion 4;Protrusion 4 is connected with center shaft 6 in middle part, and protrusion 4 is matched with the structure of slot 8 in the middle part of pump body 7, center shaft hole 11 is formed in the middle part of slot 8, and center shaft hole 11 is slidably connected with center shaft 6;

[0036] Compression structure 5 is arranged in one side of hole position, and after ceramic shaft 3 is inserted into hole position, compression structure 5 is used to make ceramic shaft 3 and protrusion 4 fixed;

[0037] Slot 8 is formed with ceramic shaft hole 10 for being fixedly connected with ceramic shaft 3 in it;

[0038] The guide limiting structure is installed on the tool base 1, and the guide limiting structure is in sliding fit with the pump body 7 along the axial direction of the pump body 7 and is in radial limiting fit with the pump body 7.

[0039] In use, the ceramic shaft 3 is installed in the hole position through the pressing structure 5, the ceramic shaft 3 is fixed with the protrusion 4, then the guide limiting structure is slid with the pump body 7, the tool base 1 is pushed to the pump body 7 by using a pressing device such as a bench clamp, the protrusion 4 is inserted into the slot 8 in the middle of the pump body 7, the ceramic shaft 3 is accurately inserted into the ceramic shaft hole 10 in the slot 8 under the sliding fit of the guide limiting structure and the pump body 7, and the ceramic shaft hole 10 is fixed with the ceramic shaft 3, and the installation of the ceramic shaft 3 is completed. The guide limiting structure is in radial limiting fit with the pump body 7, so that the guide limiting structure is prevented from rotating when being slid along the axial direction of the pump body 7, the ceramic shaft 3 is accurately inserted into the ceramic shaft hole 10, and the installation damage of the ceramic shaft 3 caused by tilting is prevented.

[0040] As an optional implementation, the guide limiting structure includes a plurality of guide columns 2, the guide columns 2 are fixedly connected with the tool base 1, the guide columns 2 are circumferentially arranged on the tool base 1, the guide columns 2 are in sliding fit with guide shaft holes 9, and the guide shaft holes 9 are arranged on the pump body 7.

[0041] The number of the guide columns 2 is at least two.

[0042] As an optional implementation, the guide limiting structure includes four guide columns 2, and the four guide columns 2 are circumferentially and equally spaced.

[0043] As an optional implementation, the ceramic shaft 3 is in interference fit with the ceramic shaft hole 10.

[0044] The ceramic shaft 3 is extruded into the ceramic shaft hole 10 by using a pressing device such as a bench clamp, so that the ceramic shaft 3 is in interference fit with the ceramic shaft hole 10, and the fixing of the ceramic shaft 3 and the ceramic shaft hole 10 is completed.

[0045] As an optional implementation, the pressing structure 5 includes:

[0046] A channel is arranged on the protrusion 4, the channel is arranged on one side of the hole position, the channel is in communication with the hole position;

[0047] A ball 12 is movably arranged in the channel, the ball 12 abuts against the side wall of the ceramic shaft 3, and the end of the channel is in limiting fit with the ball 12;

[0048] An elastic part abuts against one end of the ball 12;

[0049] A spring mounting part is fixedly connected with the channel, and the spring mounting part is connected with the other end of the elastic part.

[0050] As an optional implementation, the elastic part comprises a spring 13, one end of the spring 13 abuts against the ball 12, and the other end of the spring 13 is connected with the spring mounting part.

[0051] As an optional implementation, the spring mounting part comprises a jackscrew 14, the jackscrew 14 is fixed in the channel, and one end of the jackscrew 14 abuts against the end of the spring 13 away from the ball 12.

[0052] As an optional implementation, the jackscrew 14 is provided with external threads, the channel is provided with internal threads, and the jackscrew 14 is fixed in the channel in a threaded manner.

[0053] In use, one ball 12 is placed in the channel, the diameter of the ball 12 matches the inner diameter of the channel, a reduced-diameter structure is arranged at the position where the channel and the hole are communicated, so as to prevent the ball 12 from sliding out, and part of the ball 12 extends out of the sidewall of the hole, so as to realize extrusion with the sidewall of the ceramic shaft 3, the spring 13 is simultaneously placed in the channel, and the jackscrew 14 is screwed into the channel to be fixed, at this time, the end of the jackscrew 14 extrudes one end of the spring 13, and the other end of the spring 13 extrudes the ball 12, so that part of the ball 12 extends into the hole from the channel, at this time, the spring 13 is in a compressed state, after the ceramic shaft 3 is inserted into the hole, the ceramic shaft 3 extrudes the ball 12 to move into the channel, at this time, the spring 13 is further compressed, and the elastic force generated by the spring 13 extrudes the sidewall of the ceramic shaft 3 through the ball 12, so as to realize fixation of the ceramic shaft 3 and the hole.

[0054] When the ceramic shaft 3 is in interference fit with the ceramic shaft hole 10, because the ceramic shaft 3 and the ceramic shaft hole 10 are completely fixed, when the tool base 1 is pulled out, the fixing force of the ceramic shaft 3 and the ceramic shaft hole 10 is greater than the extrusion force of the spring 13 on the sidewall of the ceramic shaft 3 through the ball 12, so that the ceramic shaft 3 can be directly pulled out of the hole, and the installation is completed.

[0055] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0056] The above-described embodiments are only preferred modes of the present application, and do not limit the scope of the present application, and various modifications and improvements to the technical solutions of the present application made by those skilled in the art without departing from the design spirit of the present application shall fall within the protection scope of the present application.

Claims

1. A tool for installing a gear shaft pin in a gear pump, characterized by, Include: Tool base (1); The protrusion (4) is connected to the tool base (1), and the hole position for installing the ceramic shaft (3) is formed in the protrusion (4); the center shaft (6) is connected to the middle part of the protrusion (4), the protrusion (4) is matched with the slot (8) structure in the middle part of the pump body (7), the center shaft hole (11) is formed in the middle part of the slot (8), and the center shaft hole (11) is matched with the center shaft (6) in sliding mode; The compression structure (5) is arranged on one side of the hole position, and after the ceramic shaft (3) is inserted into the hole position, the compression structure (5) is used to fix the ceramic shaft (3) and the protrusion (4); The ceramic shaft hole (10) for fixing the ceramic shaft (3) is formed in the slot (8); The guide limiting structure is installed on the tool base (1), the guide limiting structure is matched with the pump body (7) in sliding mode along the axis direction of the pump body (7), and the guide limiting structure is matched with the pump body (7) in radial limiting mode.

2. A tool for installing a gear shaft pin in a gear pump as defined in claim 1, wherein: The guide limiting structure includes a plurality of guide columns (2), the guide columns (2) are fixedly connected with the tool base (1), a plurality of guide columns (2) are arranged in a circumferential direction on the tool base (1), the guide columns (2) are matched with guide shaft holes (9) in sliding mode, and the guide shaft holes (9) are formed in the pump body (7).

3. A tool for installing a gear shaft pin in a gear pump as defined in claim 2, wherein: The guide column (2) is provided with four guide columns (2), and the four guide columns (2) are arranged in a circumferential direction at equal intervals.

4. A tool for installing a gear shaft pin in a gear pump as defined in claim 1, wherein: The ceramic shaft (3) is matched with the ceramic shaft hole (10) in interference mode.

5. A tool for installing a gear shaft pin in a gear pump as defined in claim 1, wherein, The compression structure (5) includes: The channel is formed in the protrusion (4), the channel is formed on one side of the hole position, and the channel is communicated with the hole position; The ball (12) is movably arranged in the channel, the ball (12) is abutted with the side wall of the ceramic shaft (3), and the end of the channel is matched with the ball (12) in limiting mode; The elastic part is abutted with the ball (12) at one end; The spring mounting part is fixedly connected with the channel, and the other end of the spring mounting part is connected with the elastic part.

6. A tool for installing a gear shaft pin in a gear pump as defined in claim 5, wherein: The elastic part includes a spring (13), one end of the spring (13) is abutted with the ball (12), and the other end of the spring (13) is connected with the spring mounting part.

7. A tool for installing a gear shaft pin in a gear pump as defined in claim 6, wherein: The spring mounting part includes a jackscrew (14), the jackscrew (14) is fixedly connected in the channel, and one end of the jackscrew (14) is abutted with the end of the spring (13) away from the ball (12).

8. A tool for installing a gear shaft pin in a gear pump as defined in claim 7, wherein: The jackscrew (14) is provided with external threads, the channel is provided with internal threads, and the jackscrew (14) is fixedly connected with the channel in threaded mode.

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