Precise positioning tool for assembling pump body and pump shell of plunger pump

Abstract

The utility model discloses a precise positioning tool for assembling a pump body and a pump shell of a plunger pump, and relates to the field of plunger pumps. The precise positioning tool for assembling the pump body and the pump shell of the plunger pump comprises a bearing unit, a driving unit and a positioning unit, the bearing unit comprises a base platform, a moving platform and a positioning platform, spliced plunger pump assembling bodies are placed on the moving platform, and a plurality of vertically-through assembling holes are formed in the positioning platform. According to the precise positioning tool for assembling the pump body and the pump shell of the plunger pump, the plunger pump assembly body placed on the movable platform is positioned through the positioning unit, the driving unit pushes the movable platform and the plunger pump assembly body above the movable platform to move towards the positioning platform, and the plunger pump assembly body is located at a preset installation position after being in butt joint with the positioning platform; at the moment, bolts on the spliced plunger pump assembly bodies can be screwed through the multiple assembly holes by means of a tool, and the plunger pump assembly bodies cannot move in the installation process.

Description

Technical Field

[0001] This utility model relates to the field of plunger pump technology, specifically a precision positioning tooling for assembling a plunger pump body and pump casing. Background Technology

[0002] Small displacement plunger pumps have high overall assembly requirements, especially the assembly of the pump body and pump casing. Because the pump body has a raised flat sealing O-ring, during assembly, due to the small size of the part and the lack of fixation, it is necessary to hold the pump casing with one hand and use an air gun with the other hand to tighten the bolts (first use the air gun at level 1 to pre-tighten, then use level 2 to tighten, repeating twice). The assembly speed is relatively slow and requires a certain skill. If the operator's air gun handling is not good, it will directly affect the concentricity of the assembly, causing the volumetric efficiency requirements to not be met during testing.

[0003] Typically, it is difficult for beginners to master, so experienced workers are always assigned to assemble it. Under the premise of ensuring that all parts are dimensionally qualified, any unqualified pumps are disassembled and reassembled, which will generally result in qualified pumps. However, the finished product qualification rate and work efficiency will be greatly reduced. Therefore, this application proposes a precision positioning tooling for assembling the pump body and pump casing of a plunger pump. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a precision positioning fixture for assembling a plunger pump body and casing. This solves the problem that during the assembly of the pump body and casing, due to the small size of the parts and the lack of fixation, it is necessary to hold the casing with one hand and use an air gun with the other hand to tighten the bolts (first using the air gun at level 1 to pre-tighten, then using level 2 to tighten, repeating twice). This process is relatively slow and requires a certain level of skill. If the operator's air gun handling is not good, it will directly affect the concentricity of the assembly, causing the volumetric efficiency requirements to not be met during testing.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a precision positioning fixture for assembling a plunger pump body and casing, comprising:

[0006] The support unit includes a base platform, a moving platform and a positioning platform. The moving platform is located between the base platform and the positioning platform, and a spliced ​​plunger pump assembly is placed on the moving platform. The positioning platform has multiple through-holes.

[0007] A drive unit that propels the mobile platform and the piston pump assembly above it toward the positioning platform;

[0008] The positioning unit positions the plunger pump assembly placed on the mobile platform, so that the plunger pump assembly is in a predetermined installation position after docking with the positioning platform. At this time, tools can be used to fix and install the assembled plunger pump assembly through multiple assembly holes.

[0009] Preferably, guide posts are fixedly connected to the four corners of the base platform and the positioning platform, and the four corners of the moving platform are respectively movably sleeved on the outside of the four guide posts.

[0010] Preferably, the plunger pump assembly includes a pump housing and a pump body. The pump body is inserted into the top of the pump housing. The top of the pump housing has a plurality of first mounting holes. The pump body has a plurality of second mounting holes that extend vertically through the pump housing. The plurality of first mounting holes are respectively connected to the plurality of second mounting holes, and the plurality of mounting holes are respectively located directly above the plurality of second mounting holes.

[0011] Preferably, the bottom of the pump casing has multiple third mounting holes.

[0012] Preferably, the drive unit includes a cylinder, a connecting air passage, and a manual valve. The cylinder is fixedly installed above the base platform, and the output axis of the cylinder extends upward and is fixedly connected to the moving platform. The connecting air passage is connected between the cylinder and the manual valve, and the manual valve is fixedly installed on the outside of the positioning platform.

[0013] Preferably, the positioning unit includes a positioning disk and a positioning block, which are fixedly installed above the base platform and below the positioning platform, respectively. The positioning disk is in contact with the inner bottom wall of the pump casing, and the positioning block is adapted to the inner top wall of the pump body.

[0014] Preferably, the positioning unit further includes a positioning post, and the positioning post is inserted into one of the third mounting holes.

[0015] This utility model discloses a precision positioning fixture for assembling a plunger pump body and casing, which has the following beneficial effects:

[0016] 1. This precision positioning fixture for assembling the plunger pump body and casing, during use, first places the assembled plunger pump assembly on a moving platform, and places the bolts to be installed on the assembled plunger pump assembly. The positioning unit then positions the plunger pump assembly on the moving platform. At this time, the drive unit is activated, and the drive unit pushes the moving platform and the plunger pump assembly above it toward the positioning platform, so that the plunger pump assembly is in the predetermined installation position after docking with the positioning platform. Then, the bolts on the assembled plunger pump assembly can be tightened through multiple assembly holes using tools. During the installation process, the plunger pump assembly will not move, thus ensuring the concentricity of the plunger pump assembly and increasing the assembly qualification rate of the plunger pump assembly.

[0017] 2. The precision positioning fixture for assembling the pump body and pump casing of this plunger pump allows the bottom of the pump casing to be fitted onto the positioning plate when the assembled pump casing and pump body are placed on the moving platform. The positioning pin is then inserted into one of the third mounting holes, thereby fixing the position and placement angle of the pump casing and pump body. This ensures that the multiple assembly holes are directly above the multiple second mounting holes. When the moving platform is moved upward, the top of the pump body is fitted onto the positioning block, thus fixing the position of the pump casing and pump body. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a schematic diagram of part of the structure of this utility model;

[0021] Figure 3 This is a structural schematic diagram of the plunger pump assembly of this utility model.

[0022] In the diagram: 1. Bearing unit; 11. Base platform; 12. Moving platform; 13. Positioning platform; 131. Assembly hole; 14. Guide column; 2. Piston pump assembly; 21. Pump housing; 211. First mounting hole; 212. Third mounting hole; 22. Pump body; 221. Second mounting hole; 3. Drive unit; 31. Cylinder; 32. Connecting air passage; 33. Hand valve; 4. Positioning unit; 41. Positioning plate; 42. Positioning block; 43. Positioning column. Detailed Implementation

[0023] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0024] This utility model discloses a precision positioning fixture for assembling a plunger pump body and pump housing.

[0025] According to the appendix Figure 1-3 As shown, it includes:

[0026] The support unit 1 includes a base platform 11, a moving platform 12 and a positioning platform 13. The moving platform 12 is located between the base platform 11 and the positioning platform 13, and the spliced ​​plunger pump assembly 2 is placed on the moving platform 12. The positioning platform 13 has multiple through-holes 131.

[0027] Drive unit 3 pushes the moving platform 12 and the plunger pump assembly 2 above it to move toward the positioning platform 13;

[0028] Positioning unit 4 positions the plunger pump assembly 2 placed on the mobile platform 12, so that the plunger pump assembly 2 is in the predetermined installation position after docking with the positioning platform 13. At this time, tools can be used to fix and install the spliced ​​plunger pump assembly 2 through multiple assembly holes 131.

[0029] During use, the assembled plunger pump assembly 2 is first placed on the moving platform 12, and the bolts to be installed are placed on the assembled plunger pump assembly 2. The positioning unit 4 positions the plunger pump assembly 2 on the moving platform 12. At this time, the drive unit 3 is activated, and the drive unit 3 pushes the moving platform 12 and the plunger pump assembly 2 above it toward the positioning platform 13, so that the plunger pump assembly 2 is in the predetermined installation position after docking with the positioning platform 13. At this time, the bolts on the assembled plunger pump assembly 2 can be tightened through the multiple assembly holes 131 using tools. During the installation process, the plunger pump assembly 2 will not move, thus ensuring the concentricity of the plunger pump assembly 2 and increasing the assembly qualification rate of the plunger pump assembly 2.

[0030] Furthermore, guide posts 14 are fixedly connected to the four corners of the base platform 11 and the positioning platform 13, and the four corners of the moving platform 12 are respectively movably sleeved on the outside of the four guide posts 14.

[0031] The four guide pillars 14 can connect and fix the base platform 11 and the positioning platform 13, and guide the movement of the mobile platform 12.

[0032] Furthermore, the plunger pump assembly 2 includes a pump housing 21 and a pump body 22. The pump body 22 is inserted into the upper part of the pump housing 21. The upper part of the pump housing 21 has a plurality of first mounting holes 211. The pump body 22 has a plurality of second mounting holes 221 that are vertically connected. The plurality of first mounting holes 211 are respectively connected to the plurality of second mounting holes 221, and the plurality of assembly holes 131 are respectively located directly above the plurality of second mounting holes 221.

[0033] Furthermore, the bottom of the pump casing 21 is provided with multiple third mounting holes 212.

[0034] During installation, the pump body 22 is first inserted into the top of the pump housing 21 to complete its initial splicing. Then, the bolts are inserted between the first mounting hole 211 and the second mounting hole 221. Finally, the spliced ​​pump housing 21 and pump body 22 are placed on the mobile platform 12.

[0035] Specifically disclosed, the drive unit 3 includes a cylinder 31, a connecting air passage 32, and a manual valve 33. The cylinder 31 is fixedly installed above the base platform 11, and the output axis of the cylinder 31 extends upward and is fixedly connected to the moving platform 12. The connecting air passage 32 is connected between the cylinder 31 and the manual valve 33, and the manual valve 33 is fixedly installed on the outside of the positioning platform 13.

[0036] The manual valve 33 is used to conveniently control the cylinder 31 to work. When the cylinder 31 is working, its output shaft can drive the moving platform 12 to move vertically.

[0037] Specifically disclosed, the positioning unit 4 includes a positioning disk 41 and a positioning block 42. The positioning disk 41 and the positioning block 42 are respectively fixedly installed above the base platform 11 and below the positioning platform 13. The positioning disk 41 is in contact with the inner bottom wall of the pump housing 21, and the positioning block 42 is adapted to the inner top wall of the pump body 22.

[0038] Furthermore, the positioning unit 4 also includes a positioning post 43, which is inserted into one of the third mounting holes 212.

[0039] When the assembled pump housing 21 and pump body 22 are placed on the moving platform 12, the bottom of the pump housing 21 is fitted onto the positioning plate 41, and the positioning pin 43 is inserted into one of the third mounting holes 212. This fixes the position and placement angle of the pump housing 21 and pump body 22, so that the multiple assembly holes 131 are respectively located directly above the multiple second mounting holes 221. When the moving platform 12 is moved upward, the top of the pump body 22 is fitted onto the positioning block 42, thereby fixing the position of the pump housing 21 and pump body 22.

[0040] During use, the assembled plunger pump assembly 2 is first placed on the moving platform 12, and the bolts to be installed are placed on the assembled plunger pump assembly 2. The positioning unit 4 positions the plunger pump assembly 2 on the moving platform 12. At this time, the drive unit 3 is activated, and the drive unit 3 pushes the moving platform 12 and the plunger pump assembly 2 above it toward the positioning platform 13, so that the plunger pump assembly 2 is in the predetermined installation position after docking with the positioning platform 13. At this time, the bolts on the assembled plunger pump assembly 2 can be tightened through the multiple assembly holes 131 using tools. During the installation process, the plunger pump assembly 2 will not move, thus ensuring the concentricity of the plunger pump assembly 2 and increasing the assembly qualification rate of the plunger pump assembly 2.

[0041] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A precision positioning fixture for assembling a plunger pump body and casing, characterized in that, include: The support unit (1) includes a base platform (11), a moving platform (12) and a positioning platform (13). The moving platform (12) is located between the base platform (11) and the positioning platform (13), and a spliced ​​plunger pump assembly (2) is placed on the moving platform (12). The positioning platform (13) has multiple through-holes (131). Drive unit (3), which pushes the moving platform (12) and the plunger pump assembly (2) above it to move toward the positioning platform (13); The positioning unit (4) positions the plunger pump assembly (2) placed on the mobile platform (12) so that the plunger pump assembly (2) is in a predetermined installation position after docking with the positioning platform (13). At this time, the assembled plunger pump assembly (2) can be fixedly installed by tools through multiple assembly holes (131).

2. The precision positioning fixture for assembling a plunger pump body and casing according to claim 1, characterized in that, The base platform (11) and the positioning platform (13) are fixedly connected to the four corners of the guide posts (14), and the four corners of the moving platform (12) are respectively movably sleeved on the outside of the four guide posts (14).

3. The precision positioning fixture for assembling a plunger pump body and casing according to claim 1, characterized in that, The plunger pump assembly (2) includes a pump housing (21) and a pump body (22). The pump body (22) is inserted into the upper part of the pump housing (21). The upper part of the pump housing (21) has a plurality of first mounting holes (211). The pump body (22) has a plurality of second mounting holes (221) that are vertically connected. The plurality of first mounting holes (211) are respectively connected to the plurality of second mounting holes (221), and the plurality of assembly holes (131) are respectively located directly above the plurality of second mounting holes (221).

4. The precision positioning fixture for assembling a plunger pump body and casing according to claim 3, characterized in that, The bottom of the pump casing (21) is provided with a plurality of third mounting holes (212).

5. The precision positioning fixture for assembling a plunger pump body and casing according to claim 1, characterized in that, The drive unit (3) includes a cylinder (31), a connecting air passage (32), and a manual valve (33). The cylinder (31) is fixedly installed above the base platform (11), and the output axis of the cylinder (31) extends upward and is fixedly connected to the moving platform (12). The connecting air passage (32) is connected between the cylinder (31) and the manual valve (33), and the manual valve (33) is fixedly installed on the outside of the positioning platform (13).

6. The precision positioning fixture for assembling a plunger pump body and casing according to claim 3, characterized in that, The positioning unit (4) includes a positioning disk (41) and a positioning block (42). The positioning disk (41) and the positioning block (42) are fixedly installed above the base platform (11) and below the positioning platform (13), respectively. The positioning disk (41) is in contact with the inner bottom wall of the pump housing (21), and the positioning block (42) is adapted to the inner top wall of the pump body (22).

7. The precision positioning fixture for assembling a plunger pump body and casing according to claim 4, characterized in that, The positioning unit (4) further includes a positioning post (43), and the positioning post (43) is inserted into one of the third mounting holes (212).

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