A pump body assembly positioning tool

Abstract

The present invention provides a pump body assembly positioning tool, which belongs to the technical field of assembly fixtures; it includes a base, and also includes: a pump body positioning mechanism, the pump body positioning mechanism includes a groove opened on the top of the base, the mounting plate at the bottom of the pump body body is adapted to the groove, and the inner walls of the three adjacent sides of the groove are fixed with limiting strips adapted to the groove, the limiting strips are U-shaped, and when the pump body is assembled, the bottom of the limiting strip fits with the top of the mounting plate; a pump cover positioning mechanism, the pump cover positioning mechanism includes two side plates fixed to the top of the base, both side plates are provided with vertical cavities, and both facing surfaces of the two side plates are provided with through grooves three connected to the vertical cavities, the inner wall of the vertical cavity is slidably connected with a guide column, and a spring two is fixed between the bottom of the guide column and the bottom of the inner wall of the vertical cavity. The present invention avoids tilting of the pump cover pump body when it is fixed by bolts by setting the pump cover positioning mechanism, can stably position the pump cover pump body, and improve installation efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of assembly fixtures, in particular to a pump body assembly and positioning tool. Background Art

[0002] A pump is a mechanical device used to transfer liquids or gases from one location to another. It typically consists of a pump cover and a pump body. Components such as pistons, vanes, or gears within the pump body create vacuum or pressure, thereby transporting the fluid. During assembly, the pump body and pump cover are positioned, and then bolts are inserted through the pump cover to secure it to the pump body.

[0003] A search revealed a Chinese invention patent with publication number CN108581927B, which discloses a pump assembly and fixture device. The device comprises a frame operating table with two positioning columns fixed above it. The frame operating table also includes a movable bottom plate for supporting the pump body. The left and right sides of the bottom plate each have positioning holes matching the positioning columns, and the bottom plate is sleeved onto the positioning columns through the positioning holes. A top plate for securing a pump cover is fixed to the top of the positioning columns, and the bottom of the top plate is connected to a positioning pin, onto which the pump cover can be snapped. A lifting drive assembly is provided below the frame operating table, which can pass through the frame operating table and abut against the bottom plate. The pump body and pump cover of the present invention have good verticality and coaxiality when installed, resulting in good assembly precision and high assembly efficiency.

[0004] In the above patent, the pump cover is clamped on the positioning pin and fixed by the friction between the O-type rubber ring and the inner wall of the mounting hole. Therefore, the outer diameter of the O-type rubber ring is larger than the inner diameter of the mounting hole. Each time the pump cover is plugged in, the pump cover will wear the O-type rubber ring until the outer diameter of the O-type rubber ring is the same as the inner diameter of the mounting hole. After long-term use, the O-type rubber ring will be oxidized. The friction between the worn and oxidized O-type rubber ring and the mounting hole is not enough to stably position the pump cover. Therefore, this application provides a pump body assembly positioning tool to meet the needs. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a pump body assembly positioning tool to solve the problem that the friction force of the O-type rubber ring is insufficient to stably position the pump cover after long-term use.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0007] A pump body assembly and positioning tool, comprising a base and:

[0008] The pump body positioning mechanism includes a groove formed on the top of the base, a mounting plate on the bottom of the pump body that matches the groove, and a limiting strip that matches the groove fixed to the inner walls of the three adjacent sides of the groove. The limiting strip is U-shaped, and when the pump body is assembled, the bottom of the limiting strip fits in with the top of the mounting plate;

[0009] The pump cover positioning mechanism includes two side plates fixed to the top of the base, each of which is provided with a vertical cavity, and each of the two side plates is provided with a through slot three connected to the vertical cavity on the facing surfaces. A guide column is slidably connected to the inner wall of the vertical cavity, and a spring two is fixed between the bottom of the guide column and the bottom of the inner wall of the vertical cavity. A connecting block two is fixed on the circumferential surface of the guide column to slide up and down along the inner wall of the through slot three, and a support plate is fixed on the side of the connecting block two away from the guide column. The bottom of the mounting seat on the side of the pump cover body fits on the top of the support plate, and a positioning block is fixed on the top of the support plate. , a curved surface 1 is provided on the side of the positioning block close to the mounting seat, and strip plates are fixed on the facing surfaces of the two side plates. The gap between the support plate and the strip plate is smaller than the thickness of the mounting seat, and a curved surface 2 is provided on the side of the strip plate close to the mounting seat. Curved surface 1 and curved surface 2 are adapted to the circumferential surface of the mounting seat. Curved surface 1 and curved surface 2 are used to limit the mounting seat during the assembly process. When the pump cover body and the pump body are locked by bolts, the pump cover body presses down the support plate. When the pump cover body and the pump body are installed in place, the gap between the support plate and the strip plate is larger than the thickness of the mounting seat.

[0010] Preferably, the tops of the facing surfaces of the grooves are both provided with guide surfaces, and the two guide surfaces are used to guide the mounting plate when it is placed.

[0011] Preferably, the strip plate and the support plate are arranged in parallel.

[0012] Preferably, a chamfer is provided at the bottom of one end of the limiting strip close to the guide surface, and the chamfer is used for guiding the limiting strip when it contacts the mounting plate.

[0013] Preferably, a through slot 2 is provided at the bottom of the groove, an inner cavity connected to the through slot 2 is provided in the base, a trapezoidal block is slidably connected to the inner wall of the through slot 2, the inclined surface of the trapezoidal block faces the side of the trapezoidal block away from the limit bar, the trapezoidal block is used to limit the mounting plate located on the opening side of the limit bar, a connecting rod slidably connected to the inner cavity is fixed to the side of the trapezoidal block, and a spring 1 is fixed to the bottom of the trapezoidal block and the bottom of the inner cavity.

[0014] Preferably, the two side panels are provided with a through groove 1 on the facing surfaces, and an upper slide groove connected to the through groove 1 is provided in the two side panels. A lower slide groove is provided on the top of the base, and the upper slide groove and the lower slide groove are connected to the inner cavity. A vertical rod is slidably connected in the upper slide groove and the lower slide groove, and a connecting block 1 that slides up and down along the inner wall of the through groove 1 is fixed to the side of the vertical rod. The connecting block 1 is fixedly connected to the side of the support plate away from the vertical rod, and the bottom of the vertical rod is attached to the top of the connecting rod.

[0015] Preferably, there are two connecting rods in total, and the two connecting rods are symmetrically arranged about the middle of the trapezoidal block.

[0016] Preferably, the side surfaces of the two side panels are provided with square grooves communicating with the vertical cavity, a U-shaped connecting rod is fixedly connected between the two guide columns, and the side surfaces of the U-shaped connecting rod are slidably connected to the inner walls of the square grooves.

[0017] Preferably, the top of the first curved surface is provided with a first circular chamfer for guiding the mounting seat when it is placed, and the top of the second curved surface is provided with a second circular chamfer for guiding the mounting seat when it is placed.

[0018] Preferably, two side fixing seats are fixed on the side of the base, and long grooves are formed on the two side fixing seats.

[0019] Compared with the prior art, the present invention has at least the following beneficial effects:

[0020] In the above scheme, a pump cover positioning mechanism is set up, and the mounting seat on the side of the pump cover pump body is placed on the top of the support plate, and the mounting seat is positioned by the curved surface 1 of the positioning block and the curved surface 2 of the strip plate, so that the pump cover pump body can only move downward. At the same time, the positioning of the curved surface 1 and the curved surface 2 can prevent the pump cover pump body from tilting when it is fixed by bolts, and the pump cover pump body can be stably positioned to improve the installation efficiency. Secondly, after the pump body and the pump cover body are assembled, the pump body and the pump cover body move toward the strip plate. When the bolts of the pump body and the pump cover body are in place, the mounting seat can pass through the bottom of the strip plate. When the bolts of the pump body and the pump cover body are not in place, the mounting seat will be stuck at the curved surface 2 of the strip plate, indicating that the pump cover pump body is not installed in accordance with the standard, so that the installation of the pump body and the pump cover body is more standardized.

[0021] By setting up a pump body positioning mechanism, when the pump body is placed, the mounting plate can be quickly slid into the groove through the guidance of the guide surface, and the positioning efficiency is higher. By setting up a trapezoidal block, the mounting plate can be prevented from moving in the horizontal direction. By setting up a connecting block 1, a vertical rod and a connecting rod, when the pump cover body is assembled by bolts, the mounting seat drives the support plate to move downward, the support plate drives the vertical rod to move downward, and the vertical rod drives the trapezoidal block to move downward. When the pump cover body is assembled, the trapezoidal block moves into the through groove 2, so that the pump body and the pump cover body can be directly pulled out, and the operation is more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings, which are incorporated herein and constitute a part of the specification, illustrate embodiments of the present disclosure and, together with the description, further serve to explain the principles of the present disclosure and to enable one skilled in the relevant art to make and use the present disclosure.

[0023] Figure 1This is a schematic diagram of the overall structure of the pump body assembly and positioning tooling;

[0024] Figure 2 It is a structural diagram of the pump body and pump cover body;

[0025] Figure 3 This is a cross-sectional view of the pump body assembly positioning tooling side panel;

[0026] Figure 4 This is a cross-sectional view of the U-shaped connecting rod of the pump body assembly positioning tool;

[0027] Figure 5 This is a cross-sectional view of the square groove of the pump body assembly positioning tool;

[0028] Figure 6 This is a cross-sectional view of the pump body assembly positioning tool base;

[0029] Figure 7 This is a cross-sectional view of the pump body assembly positioning tool strip plate;

[0030] Figure 8 This is a cross-sectional view of the upper and lower slide grooves of the pump body assembly positioning tooling.

[0031] In the figure: 1. Base; 2. Side fixing seat; 3. Pump body positioning mechanism; 301. Groove; 302. Guide surface; 303. Limiting strip; 304. Through slot 1; 305. Upper slide; 306. Lower slide; 307. Connecting block 1; 308. Vertical rod; 309. Inner cavity; 310. Through slot 2; 311. Trapezoidal block; 312. Spring 1; 313. Connecting rod; 4. Pump cover positioning mechanism; 401. Vertical cavity; 402. Guide column; 403. Spring 2; 404. Through slot 3; 405. Connecting block 2; 406. Support plate; 407. Positioning block; 408. Curved surface 1; 409. Strip plate; 410. Curved surface 2; 411. Square groove; 412. U-shaped connecting rod; 413. Side plate; 5. Pump body; 6. Mounting plate; 7. Pump cover body; 8. Mounting seat.

[0032] As shown in the figure, in order to clearly implement the structure of the embodiment of the present invention, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the present invention to the specific structure, device and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments, and the adjustments or modifications made are still included in the scope of the appended claims. DETAILED DESCRIPTION

[0033] The pump body assembly and positioning tool provided by the present invention is described in detail below with reference to the accompanying drawings and specific embodiments. It is also noted that, to provide a more detailed description, the following embodiments are optimal and preferred embodiments, and those skilled in the art may employ alternative implementations for some known technologies. Furthermore, the accompanying drawings are intended only to provide a more detailed description of the embodiments and are not intended to limit the present invention.

[0034] It should be noted that references in the specification to "one embodiment," "an embodiment," "exemplary embodiments," "some embodiments," etc. indicate that the described embodiments may include specific features, structures, or characteristics, but not necessarily every embodiment will include such specific features, structures, or characteristics. Furthermore, when specific features, structures, or characteristics are described in conjunction with an embodiment, it is within the knowledge of persons skilled in the relevant art to implement such features, structures, or characteristics in conjunction with other embodiments (whether or not explicitly described).

[0035] In general, terms can be understood, at least in part, from their use in context. For example, depending at least in part on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in the singular sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense. Additionally, the term "based on" can be understood as not necessarily intended to convey an exclusive set of factors, but can instead, depending at least in part on the context, allow for the presence of other factors that are not necessarily explicitly described.

[0036] like Figures 1-8 As shown, an embodiment of the present invention provides a pump body assembly positioning tool, including a base 1, and further comprising:

[0037] The pump body positioning mechanism 3 includes a groove 301 formed on the top of the base 1. The mounting plate 6 at the bottom of the pump body 5 is adapted to the groove 301. The inner walls of the three adjacent sides of the groove 301 are fixed with limiting strips 303 adapted to the groove 301. The limiting strips 303 are U-shaped. When the pump body is assembled, the bottom of the limiting strip 303 is in contact with the top of the mounting plate 6.

[0038] The pump cover positioning mechanism 4 includes two side plates 413 fixed to the top of the base 1, and a vertical cavity 401 is provided in each of the two side plates 413. The two side plates 413 are provided with a through slot 3 404 connected to the vertical cavity 401 on the facing surfaces. A guide column 402 is slidably connected to the inner wall of the vertical cavity 401. A spring 2 403 is fixed between the bottom of the guide column 402 and the bottom of the inner wall of the vertical cavity 401. A connecting block 2 405 that slides up and down along the inner wall of the through slot 3 404 is fixed on the circumferential surface of the guide column 402. The connecting block 2 405 is away from the guide column 402. A support plate 406 is fixed to one side of the column 402, and the bottom of the mounting seat 8 on the side of the pump cover body 7 is fitted on the top of the support plate 406. A positioning block 407 is fixed to the top of the support plate 406. A curved surface 1 408 is provided on the side of the positioning block 407 close to the mounting seat 8. Strip plates 409 are fixed to the facing surfaces of the two side plates 413. The gap between the support plate 406 and the strip plates 409 is smaller than the thickness of the mounting seat 8. A curved surface 2 410 is provided on the side of the strip plate 409 close to the mounting seat 8. The curved surface 1 408 and the curved surface 2 410 are aligned with the mounting seat 8. The circumferential surface is adapted to the circumferential surface of the pump cover body 7. The curved surface 1 408 and the curved surface 2 410 are used to limit the mounting seat 8 during the assembly process. When the pump cover body 7 and the pump body 5 are locked by bolts, the pump cover body 7 presses the support plate 406. When the pump cover body 7 and the pump body 5 are installed in place, the gap between the support plate 406 and the strip plate 409 is greater than the thickness of the mounting seat 8. The mounting seat 8 is fixed to the side of the pump cover body 7, and the mounting plate 6 is fixed to the bottom of the pump body 5. Bolt holes are provided on the pump cover body 7 and the pump body 5. The bolts pass through the bolts of the pump cover body 7. After the screw hole is screwed into the bolt hole of the pump body 5, the pump cover body 7 and the pump body 5 are assembled together. The pump body 5 is placed in the groove 301, and the pump body 5 is fixed in the horizontal and vertical directions by the groove 301, the limit strip 303 and the trapezoidal block 311. The mounting seat 8 on the side of the pump cover body 7 is placed between the curved surface 1 408 and the curved surface 2 410 to position the pump cover body 7. When the pump cover body 7 is assembled, whether the pump cover body 7 is installed standardly is detected by whether the mounting seat 8 can pass through the strip plate 409.

[0039] like Figure 1 As shown, in this embodiment, guide surfaces 302 are provided on the tops of the facing surfaces of the groove 301. The two guide surfaces 302 are used to guide the mounting plate 6 when it is placed. When the mounting plate 6 is placed into the groove 301, the guide surfaces 302 guide the mounting plate 6 so that the mounting plate 6 slides toward the direction of the groove 301, and the mounting plate 6 slides into the groove 301 more easily.

[0040] like Figure 1As shown, in this embodiment, the strip plate 409 is arranged parallel to the support plate 406, and the strip plate 409 is fixed to the surface of the side plate 413 by screws. After the strip plate 409 is arranged parallel to the support plate 406, the mounting seat 8 can slide a certain distance at the bottom of the strip plate 409, so that the strip plate 409 can continuously detect the mounting seat 8 for a period of time, and the detection is more accurate.

[0041] like Figure 1 As shown, in this embodiment, a chamfer is provided at the bottom of one end of the limiting strip 303 close to the guide surface 302. The chamfer is used to guide the limiting strip 303 when it contacts the mounting plate 6. When the mounting plate 6 moves toward the limiting strip 303, the mounting plate 6 first contacts the chamfer. The chamfer guides the mounting plate 6 so that the mounting plate 6 can enter directly below the limiting strip 303 more smoothly.

[0042] like Figure 6-Figure 8 As shown, in this embodiment, a through slot 2 310 is provided at the bottom of the groove 301, and an inner cavity 309 connected to the through slot 2 310 is provided in the base 1. A trapezoidal block 311 is slidably connected to the inner wall of the through slot 2 310, and the inclined surface of the trapezoidal block 311 faces the side of the trapezoidal block 311 away from the limiting bar 303. The trapezoidal block 311 is used to limit the mounting plate 6 to be located on the opening side of the limiting bar 303. A connecting rod 313 slidably connected to the inner cavity 309 is fixed to the side of the trapezoidal block 311, and a spring 1 312 is fixed to the bottom of the trapezoidal block 311 and the bottom of the inner cavity 309. The elastic force of the spring 1 312 is greater than the total gravity of the trapezoidal block 311 and the two connecting rods 313. The trapezoidal block 311 positions the mounting plate 6 to prevent the mounting plate 6 from moving toward the trapezoidal block 311 during assembly.

[0043] like Figure 7 and Figure 8 As shown, in this embodiment, the two side plates 413 are provided with a through groove 304 on the facing surfaces, and the two side plates 413 are provided with an upper sliding groove 305 connected to the through groove 304. A lower sliding groove 306 is provided on the top of the base 1. The upper sliding groove 305 and the lower sliding groove 306 are connected to the inner cavity 309. A vertical rod 308 is slidably connected in the upper sliding groove 305 and the lower sliding groove 306. A connecting block 307 that slides up and down along the inner wall of the through groove 304 is fixed on the side of the vertical rod 308. The side of the connecting block 307 away from the vertical rod 308 is connected to the support plate 40 6, the side is fixedly connected, the bottom of the vertical rod 308 fits on the top of the connecting rod 313, and the vertical rod 308 can slide on the inner wall of the upper slide groove 305 and the lower slide groove 306. When the support plate 406 moves downward, the support plate 406 drives the connecting block 307 to move downward, and the connecting block 307 drives the vertical rod 308 to move downward. The vertical rod 308 is against the top of the connecting rod 313 to move the connecting rod 313 downward, and the connecting rod 313 drives the trapezoidal block 311 to move downward. There is no need to move the trapezoidal block 311 downward by hand, and the operation is more convenient.

[0044] like Figure 7 As shown, in this embodiment, there are two connecting rods 313, and the two connecting rods 313 are symmetrically arranged about the middle of the trapezoidal block 311. The two connecting rods 313 support the trapezoidal block 311 at the same time, and the force on both sides of the trapezoidal block 311 is more evenly distributed, thereby preventing the trapezoidal block 311 from tilting and making the trapezoidal block 311 more stable during movement.

[0045] like Figure 3 As shown, in this embodiment, square grooves 411 connected to the vertical cavity 401 are provided on the sides of the two side plates 413, and a U-shaped connecting rod 412 is fixedly connected between the two guide columns 402. The side of the U-shaped connecting rod 412 is slidably connected to the inner wall of the square groove 411. The two guide columns 402 connected by the U-shaped connecting rod 412 can move up or down at the same time when the guide columns 402 move upward or downward, so that the movement of the guide columns 402 is more stable, and the support plates 406 on both sides move synchronously.

[0046] like Figure 1 As shown, in this embodiment, a circular chamfer 1 is provided on the top of the curved surface 1 408 for guiding the mounting seat 8 when it is placed, and a circular chamfer 2 is provided on the top of the curved surface 2 410 for guiding the mounting seat 8 when it is placed. After the circular chamfer 1 and the circular chamfer 2 are provided, when the mounting seat 8 is placed, the circular chamfer 1 and the circular chamfer 2 guide the bottom of the mounting seat 8, making it easier to place the mounting seat 8 between the curved surface 1 408 and the curved surface 2 410.

[0047] like Figure 1 As shown, in this embodiment, two side fixing seats 2 are fixed on the side of the base 1, and long grooves are provided on the two side fixing seats 2. After the base 1 is placed on the workbench, the side fixing seats 2 are fixed on the workbench by passing bolts through the long grooves on the side fixing seats 2, so that the base 1 is fixed. After fixation, the base 1 is more stable during use.

[0048] After the jacking is complete, the jacking plate 310 is tightened and the jacking member 312 is tightened, so that the jacking member 310 is tightened.

[0049] Then, the mounting seat 8 on the side of the pump cover body 7 is placed on the top of the support plate 406. The mounting seat 8 is located between the curved surface 1 408 of the positioning block 407 and the curved surface 2 410 of the strip plate 409. The mounting seat 8 on the side of the pump cover body 7 is positioned by the curved surface 1 408 and the curved surface 2 410.

[0050] After the pump cover body 7 is positioned, the bolt is passed through the bolt hole of the pump cover body 7, and the bottom of the bolt contacts the bolt hole of the pump body 5. The bolt is screwed into the bolt hole of the pump body 5. During the rotation of the bolt, the bolt moves downward, and the bolt drives the pump cover pump body to move downward, and the pump cover pump body drives the mounting seat 8 to move downward, and the mounting seat 8 drives the support plate 406 to move downward. The positioning of the curved surface 1 408 and the curved surface 2 410 prevents the mounting seat 8 from moving horizontally and tilting at the same time, until the pump cover body 7 is completely assembled on the pump body 5, and then the bolts are fixed in sequence;

[0051] At the same time, as the support plate 406 moves downward, the support plate 406 drives the second connecting block 405 to slide downward on the inner wall of the third through-slot 404. The second connecting block 405 drives the guide column 402 to move downward, compressing the second spring 403 at the bottom of the guide column 402. The guide column 402 drives the U-shaped connecting rod 412 to slide downward on the inner wall of the square slot 411, so that the two guide columns 402 move together in the vertical direction, and the movement is more stable.

[0052] As the support plate 406 moves downward, the support plate 406 drives the connecting block 1 307 to slide downward in the through slot 3 404 , and the connecting block 1 307 drives the vertical rod 308 to move downward. As the vertical rod 308 moves downward, the vertical rod 308 abuts against the top of the connecting rod 313, causing the connecting rod 313 to move downward. The connecting rod 313 drives the trapezoidal block 311 to move downward. When the bolts are tightened into place, the trapezoidal block 311 moves completely into the through slot 2 310, so that the mounting plate 6 is no longer restricted in the direction toward the trapezoidal block 311.

[0053] After the pump cover body 7 and the pump body 5 are assembled, the pump cover body 7 and the pump body 5 are moved toward the direction of the trapezoidal block 311. When the pump cover body 7 and the pump body 5 are assembled to the standard, the mounting seat 8 on the side of the pump cover body 7 can slide over the bottom of the strip plate 409. When the pump cover body 7 and the pump body 5 are assembled not to the standard, the mounting seat 8 on the side of the pump cover body 7 will be stuck by the strip plate 409, which reminds the staff that the bolts of the pump cover body 7 are not screwed in place. Tighten the bolts again until the mounting seat 8 can slide over the bottom of the strip plate 409.

[0054] When the pump cover body 7 and the pump body 5 move out of the base 1, the spring 2 403 rebounds upward, the spring 2 403 drives the guide column 402 to move upward, the guide column 402 drives the connecting block 2 405 to move upward, the connecting block 2 405 drives the support plate 406 to move upward, so that the strip plate 409 is reset, and the spring 1 312 also rebounds upward, the spring 1 312 drives the trapezoidal block 311 to move upward, so that the trapezoidal block 311 is reset, and then a new set of pump cover body 7 and pump body 5 can be assembled again.

[0055] The present invention encompasses any substitutions, modifications, equivalent methods, and solutions that fall within the spirit and scope of the present invention. In order to provide the public with a thorough understanding of the present invention, specific details are described in detail in the preferred embodiments of the present invention above, but those skilled in the art can fully understand the present invention without these detailed descriptions.

[0056] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A pump body assembly positioning tool, comprising a base (1), characterized in that: Also includes: A pump body positioning mechanism (3), the pump body positioning mechanism (3) comprising a groove (301) provided on the top of the base (1), a mounting plate (6) at the bottom of the pump body (5) adapted to the groove (301), and limiting strips (303) adapted to the groove (301) fixed to the inner walls of three adjacent sides of the groove (301), the limiting strips (303) being U-shaped, and when the pump body is assembled, the bottom of the limiting strip (303) is in contact with the top of the mounting plate (6); A pump cover positioning mechanism (4), the pump cover positioning mechanism (4) includes two side plates (413) fixed on the top of the base (1), a vertical cavity (401) is provided in each of the two side plates (413), a through slot three (404) connected to the vertical cavity (401) is provided on the facing surfaces of the two side plates (413), a guide column (402) is slidably connected to the inner wall of the vertical cavity (401), a spring two (403) is fixed between the bottom of the guide column (402) and the bottom of the inner wall of the vertical cavity (401), a connecting block two (405) is fixed on the circumferential surface of the guide column (402) and slides up and down along the inner wall of the through slot three (404), a support plate (406) is fixed on the side of the connecting block two (405) away from the guide column (402), and a mounting seat on the side of the pump cover body (7) is provided. The bottom of (8) is fitted on the top of the support plate (406), a positioning block (407) is fixed on the top of the support plate (406), a curved surface (408) is provided on the side of the positioning block (407) close to the mounting seat (8), and strip plates (409) are fixed on the facing surfaces of the two side plates (413), the gap between the support plate (406) and the strip plates (409) is smaller than the thickness of the mounting seat (8), the facing surfaces of the two side plates (413) are provided with a through groove (304), and the two side plates (413) are provided with an upper slide groove (305) connected to the through groove (304), and the top of the base (1) is provided with a lower slide groove (306), the upper slide groove (305) is connected to the lower slide groove (306), and the upper slide groove (305) and the lower slide groove (306) are connected. ) is slidably connected with a vertical rod (308), and a connecting block (307) is fixed on the side of the vertical rod (308) and slides up and down along the inner wall of the through groove (304). The connecting block (307) is fixedly connected to the side of the support plate (406) away from the vertical rod (308). A through groove (310) is provided at the bottom of the groove (301). An inner cavity (309) connected to the through groove (310) and the lower groove (306) is provided in the base (1). A trapezoidal block (311) is slidably connected to the inner wall of the through groove (310). The inclined surface of the trapezoidal block (311) faces the side of the trapezoidal block (311) away from the limiting strip (303). The trapezoidal block (311) is used to limit the mounting plate (6) located on the opening side of the limiting strip (303). A connecting rod (313) is fixed on the side of the block (311) and is slidably connected to the inner cavity (309). The bottom of the vertical rod (308) is fitted on the top of the connecting rod (313). A spring (312) is fixed to the bottom of the trapezoidal block (311) and the bottom of the inner cavity (309). A curved surface (410) is provided on one side of the strip plate (409) close to the mounting seat (8). The curved surface (408) and the curved surface (410) are adapted to the circumferential surface of the mounting seat (8). The curved surface (408) and the curved surface (410) are used to limit the mounting seat (8) during the assembly process. When the pump cover body (7) and the pump body (5) are locked by bolts, the pump cover body (7) presses down the support plate (406). When the pump cover body (7) and the pump body (5) are installed in place,The gap between the support plate (406) and the strip plate (409) is greater than the thickness of the mounting seat (8).

2. The pump body assembly and positioning tool according to claim 1, characterized in that: The tops of the facing surfaces of the groove (301) are each provided with a guide surface (302), and the two guide surfaces (302) are used to guide the mounting plate (6) when it is placed.

3. The pump body assembly and positioning tool according to claim 1, characterized in that: The strip plate (409) and the support plate (406) are arranged in parallel.

4. The pump body assembly and positioning tool according to claim 3, characterized in that: A chamfer is provided at the bottom of one end of the limiting strip (303) close to the guide surface (302), and the chamfer is used for guiding the limiting strip (303) when it contacts the mounting plate (6).

5. The pump body assembly and positioning tool according to claim 1, characterized in that: There are two connecting rods (313) in total, and the two connecting rods (313) are symmetrically arranged about the middle of the trapezoidal block (311).

6. The pump body assembly and positioning tool according to claim 1, characterized in that: The sides of the two side plates (413) are each provided with a square groove (411) connected to the vertical cavity (401), a U-shaped connecting rod (412) is fixedly connected between the two guide columns (402), and the side of the U-shaped connecting rod (412) is slidably connected to the inner wall of the square groove (411).

7. The pump body assembly and positioning tool according to claim 1, characterized in that: The top of the first curved surface (408) is provided with a first circular chamfer for guiding the mounting seat (8) when it is placed, and the top of the second curved surface (410) is provided with a second circular chamfer for guiding the mounting seat (8) when it is placed.

8. The pump body assembly and positioning tool according to claim 1, characterized in that: Two side fixing seats (2) are fixed on the sides of the base (1), and both side fixing seats (2) are provided with long grooves.

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