Universal impeller clamp, impeller pull-out force testing tool and impeller torque testing tool

Abstract

The utility model discloses a universal fixture for an impeller, which comprises an annular fixture body, a plurality of impeller positioning pins distributed in an array along the circumferential direction are movably arranged on the fixture body along the radial direction of the fixture body, each impeller positioning pin extends inwards along the radial direction, and a plane structure for supporting the impeller is arranged on the circumferential side wall of the inner end part of each impeller positioning pin. By the adoption of the universal fixture for the impeller, the impeller positioning pins can move in the radial direction of the tool body, so that the universal fixture can be suitable for impellers of different sizes and can be suitable for various impellers with different blade numbers by adjusting the number of the impeller positioning pins, universality is high, cost is reduced, and testing efficiency is improved. The utility model further discloses an impeller pulling-out force testing tool which comprises a support, a pressure device and the universal fixture for the impeller. The utility model further discloses an impeller torque testing tool which comprises a bench clamp, a clamp end cover, a torque wrench and the universal clamp for the impeller.

Description

TECHNICAL FIELD

[0001] The utility model relates to impeller clamp and test frock technical field, concretely relates to a kind of impeller general fixture, impeller pull-out force test frock and impeller torque test frock. BACKGROUND

[0002] Automobile water pump impeller is the key component of cooling system, through rotation to push cooling liquid circulation, ensure that engine temperature is stable.Its design, material and maintenance directly influence the performance of cooling system and engine life.

[0003] When pull-out force and torque test are needed before automobile water pump impeller leaves factory, the existing method can only use two different frocks to carry out pull-out force test and torque test respectively, with high cost and low test efficiency. UTILITY MODEL CONTENTS

[0004] To solve the technical problems of high cost and low test efficiency of impeller pull-out force and torque test, the utility model provides a kind of impeller general fixture, impeller pull-out force test frock and impeller torque test frock.

[0005] Its technical scheme is as follows:

[0006] The first aspect of the application relates to a kind of impeller general fixture, including annular frock body, the frock body can be moved along its radial direction There are a plurality of impeller positioning pins arranged in array along the circumference, each impeller positioning pin extends inward along the radial direction, and the circumferential side wall of its inner end is provided with a plane structure for supporting impeller.

[0007] Using the above impeller general fixture, the impeller positioning pin can move along the radial direction of the frock body, so it can be applied to impellers of different sizes, and by adjusting the number of impeller positioning pins, it can be applied to impellers with different numbers of blades, with high versatility, which reduces the cost and improves the test efficiency.

[0008] In some embodiments, the frock body is provided with a plurality of positioning pin mounting holes, each impeller positioning pin includes a mounting section and a support section connected to the inner end of the mounting section, each mounting section is a cylindrical structure, and is arranged in the corresponding positioning pin mounting hole from outside to inside, and each support section is a polygonal prism structure.Using the above structure, the impeller positioning pin is easy to process and convenient to assemble and disassemble.

[0009] In some embodiments, the outer side wall of the frock body is provided with at least two support cantilevers uniformly distributed along the circumference, and each support cantilever extends outward along the radial direction of the frock body.Using the above structure, the frock body can be hung and supported by the support cantilever, which is convenient to operate.

[0010] The second aspect of the present application relates to a test tool for impeller pull-out force, comprising a support, a pressure device and the impeller universal clamp, each of the support cantilevers is supported on the support, and the pressure device can exert a controllable downward pressure on the upper end of the impeller shaft of the impeller.

[0011] The test tool for impeller pull-out force has all the advantages of the impeller universal clamp, is easy to operate and has high test efficiency.

[0012] In some embodiments, the support comprises two oppositely arranged support plates, the bottoms of the two support plates are fixedly installed on the pressure device, and the tool body is provided with two support cantilevers, and the lower surfaces of the two support cantilevers are respectively supported on the upper surfaces of the corresponding support plates. With the above structure, the tool body is suspended on the support plates through the support cantilevers, and is stable and reliable.

[0013] In some embodiments, the pressure device is a universal testing machine. With the above structure, the universal testing machine is easy to obtain, has good controllability, and is convenient for reading values.

[0014] The third aspect of the present application relates to a test tool for impeller torque, comprising a bench clamp, a clamp end cover, a torque wrench and the impeller universal clamp, the bench clamp can clamp the lower end of the impeller shaft, the clamp end cover is synchronously rotatably buckled above the tool body, the top of the clamp end cover is provided with a prismatic clamping part, and the clamping part and the square head of the torque wrench can be connected through an anti-rotation sleeve, so that the torque wrench can drive the clamp end cover to synchronously rotate through the anti-rotation sleeve.

[0015] The test tool for impeller torque has all the advantages of the impeller universal clamp, is easy to operate and has high test efficiency.

[0016] In some embodiments, two connecting pins are further included, each of the connecting pins is a cylinder, the clamp end cover is provided with two installation through holes, the tool body is provided with installation blind holes which are upwardly open and correspond to the installation through holes one by one, and the connecting pins pass through the corresponding installation through holes and installation blind holes from top to bottom in sequence. With the above structure, the tool body and the clamp end cover are connected by the connecting pins, which is convenient and fast to install and has high reliability. The connecting pins are low in cost and convenient to process. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a top view of the impeller universal clamp;

[0018] Figure 2 is a structural schematic view of the impeller universal clamp;

[0019] Figure 3 is a structural schematic view of the impeller universal clamp and the impeller;

[0020] Figure 4 Structure diagram of the impeller unthreading force test tool;

[0021] Figure 5 Structure diagram of the clamp end cover;

[0022] Figure 6 Structure diagram of the impeller torque test tool;

[0023] Figure 7 Structure diagram of the anti-rotation sleeve;

[0024] Figure 8 Structure diagram of the impeller. DETAILED DESCRIPTION

[0025] The utility model will be further described below in combination with the embodiments and drawings.

[0026] Embodiment one:

[0027] As shown in Figure 1 and Figure 2 , a universal clamp for impeller mainly comprises a tool body 1, an impeller positioning pin 2 and a support cantilever 3.

[0028] As shown in Figures 1 to 3 , the tool body 1 is annular, and a plurality of positioning pin mounting holes 1a are arranged on the tool body 1 in an array along the circumference, each positioning pin mounting hole 1a extending from the outer side wall to the inner side wall of the tool body 1 along the radial direction. At least two support cantilevers 3 are arranged on the outer side wall of the tool body 1 in a uniform distribution along the circumference, each support cantilever 3 extending outward along the radial direction of the tool body 1. In this embodiment, two support cantilevers 3 are arranged on the outer side wall of the tool body 1, and the two support cantilevers 3 are both cuboid structures, and the upper surfaces thereof are located in the same horizontal plane as the upper surface of the tool body 1. The tool body 1 and the support cantilevers 3 are integrally formed, which is stable in structure, easy to process and high in strength.

[0029] Each impeller positioning pin 2 includes an installation section 2a and a support section 2b connected to the inner end of the installation section 2a. The installation section 2a of each impeller positioning pin 2 is a cylindrical structure and can be radially moved along the tooling body 1 and inserted into the corresponding positioning pin installation hole 1a. The circumferential sidewall of each support section 2b is provided with a planar structure for supporting the impeller A, preferably a polygonal prism structure. In this embodiment, the impeller positioning pin 2 is integrally formed, with high strength and strong load-bearing capacity. The length of each installation section 2a is greater than the length of the positioning pin installation hole 1a, and each support section 2b is a quadrangular prism structure. When performing a pull-out force test, the upper surface of each support section 2b supports the lower surface of the impeller end cap of the impeller A. The surface contact support method is more stable and reliable, with a larger force-bearing area, avoiding deformation of the impeller A. When performing a torque test, the sidewall of the impeller positioning pin 2 abuts against the outer edge of the blade of the impeller A, which can ensure that the impeller A and the fixture rotate synchronously.

[0030] Example 2:

[0031] like Figure 4 As shown, a fixture for testing impeller pull-out force includes a support 4, a pressure device 10, and the aforementioned universal impeller fixture. Each supporting cantilever 3 is supported on the support 4, and the pressure device 10 can apply a downward controllable pressure to the upper end of the impeller shaft of impeller A. In this embodiment, the support 4 includes two opposing support plates 4a, the bottoms of which are fixedly mounted on the pressure device 10. The lower surfaces of the two supporting cantilever 3 are respectively supported on the upper surfaces of the corresponding support plates 4a. The pressure device 10 is a universal testing machine. Impeller A's impeller body and impeller cover are welded together, and the impeller body and impeller shaft are interference fit. Since the pull-out force between the impeller body and impeller shaft (generally tens of kN) is much greater than the pull-out force between the impeller cover and impeller body (generally tens of N), when performing the impeller pull-out force test, a universal testing machine is used to hold the upper end of the impeller shaft of impeller A and apply pressure to read the pressure value when the impeller cover separates from the impeller body.

[0032] Example 3:

[0033] like Figures 5 to 8 As shown, an impeller torque testing fixture includes a vise 5, a clamp end cap 6, a torque wrench 7, and the aforementioned universal impeller clamp. The vise 5 is used to support and fix the impeller A. The lower end of the impeller shaft of the impeller A is ground with a rectangular notch. When the vise 5 clamps the lower end of the impeller shaft, it can prevent relative rotation between the impeller shaft and the vise 5.

[0034] The clamp end cover 6 is synchronously rotatably buckled above the tool body 1, and the clamp end cover 6 is an integrally-formed cylindrical structure, which is stable and reliable. Specifically, two mounting through holes 6b are arranged on the clamp end cover 6, and the tool body 1 is provided with mounting blind holes 1b which are upwardly open and correspond to the mounting through holes 6b one by one, and two connecting pins 8 are sequentially passed through the corresponding mounting through holes 6b and mounting blind holes 1b from top to bottom. The connecting pin 8 is a cylindrical structure, which is convenient to process. When the torque test is performed, the connecting pin 8 can make the clamp end cover 6 and the tool body 1 synchronously rotate, which is simple and reliable, and convenient to assemble and disassemble. The clamp end cover 6 is provided with a clamping part 6a in the form of a prism on the top, and the clamping part 6a and the square head of the torque wrench 7 can be connected through the anti-rotation sleeve 9, so that the torque wrench 7 can drive the clamp end cover 6 to synchronously rotate through the anti-rotation sleeve 9. Specifically, the clamping part 6a is a hexagonal prism, one end of the anti-rotation sleeve 9 is provided with an inner hole which is adapted to the square head of the torque wrench 7, and the other end is provided with an inner hole which is adapted to the clamping part 6a. When the impeller torque test is performed, the torque wrench 7 is rotated, and the torque value when the impeller body and the impeller shaft slip can be read.

[0035] Finally, it should be noted that the above description is only the preferred embodiment of the utility model, and those skilled in the art can make various similar expressions under the inspiration of the utility model without violating the purpose and claims of the utility model, and such changes fall within the protection scope of the utility model.

Claims

1. A universal impeller clamp, characterized in that: The tooling body (1) is annular and has a plurality of impeller positioning pins (2) arranged in an array along the circumference, which are movable along the radial direction. Each impeller positioning pin (2) extends radially inward and has a planar structure for supporting the impeller A on the circumferential sidewall at its inner end.

2. The universal impeller clamp according to claim 1, characterized in that: The tooling body (1) is provided with a plurality of positioning pin mounting holes (1a). Each impeller positioning pin (2) includes a mounting section (2a) and a supporting section (2b) connected to the inner end of the mounting section (2a). Each mounting section (2a) is a cylindrical structure and passes through the corresponding positioning pin mounting hole (1a) from the outside to the inside. Each supporting section (2b) is a polygonal prism structure.

3. The universal impeller clamp according to claim 1, characterized in that: At least two circumferentially distributed support cantilever arms (3) are provided on the outer side wall of the tooling body (1), and each support cantilever arm (3) extends outward along the radial direction of the tooling body (1).

4. A fixture for testing impeller pull-out force, characterized in that: Includes a support (4), a pressure device (10), and a universal impeller clamp according to any one of claims 1 to 3, wherein each of the support cantilever (3) is supported on the support (4), and the pressure device (10) is capable of applying downward controllable pressure to the upper end of the impeller shaft of the impeller A.

5. The impeller pull-out force testing fixture according to claim 4, characterized in that: The support (4) includes two support plates (4a) arranged opposite to each other. The bottom of the two support plates (4a) is fixedly installed on the pressure device (10). The tool body (1) is provided with two support cantilever arms (3). The lower surfaces of the two support cantilever arms (3) are respectively supported on the upper surfaces of the corresponding support plates (4a).

6. The impeller pull-out force testing fixture according to claim 4, characterized in that: The pressure device (10) is a universal testing machine.

7. A fixture for testing impeller torque, characterized in that: The fixture includes a vise (5), a clamp end cap (6), a torque wrench (7), and a universal impeller clamp according to any one of claims 1 to 3. The vise (5) is capable of clamping the lower end of the impeller shaft of the impeller A. The clamp end cap (6) is synchronously rotated and fastened to the upper part of the tooling body (1). The top of the clamp end cap (6) is provided with a prism-shaped clamping part (6a). The clamping part (6a) and the square head of the torque wrench (7) can be connected through an anti-rotation sleeve (9), so that the torque wrench (7) can drive the clamp end cap (6) to rotate synchronously with it through the anti-rotation sleeve (9).

8. The impeller torque testing fixture according to claim 7, characterized in that: It also includes two connecting pins (8), each of which is a cylinder. The fixture end cap (6) is provided with two mounting through holes (6b), and the tooling body (1) is provided with mounting blind holes (1b) with the opening facing upward and corresponding to the mounting through holes (6b) one by one. The connecting pins (8) pass through the corresponding mounting through holes (6b) and mounting blind holes (1b) from top to bottom.

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