Self-expanding positioning tool clamp for pump shell

Abstract

The present application relates to a kind of pump shell self-expansion positioning tool clamps, including support seat, its lower end is fixedly connected with chuck, its upper end is suitable for being inserted from the D bottom hole of pump shell;Limiting support mechanism, be set on support seat;When the pump shell is pressed down, the B conical surface of pump shell triggers limiting support mechanism, to make the limiting support mechanism to the C reference surface of pump shell carry out limiting support, to limit the pump shell and support in predetermined depth;Chuck, the disc body center position of the chuck is fixedly connected with support seat, each claw of the chuck is suitable for the clamping of limiting support pump shell.By the driving of each limiting support rod radially outward extension when pump shell is pressed down, limiting support to pump shell is realized, after being clamped by chuck, it can be turned to process, after pump shell is taken away upward, with core disc automatic lifting, each limiting support rod realizes automatic retraction, so that the clamping process of pump shell is more simple and convenient, improve the clamping efficiency, and precision is also guaranteed.

Description

Technical Field

[0001] This invention relates to the field of tooling fixtures, and more specifically to a pump casing self-extension positioning tooling fixture. Background Technology

[0002] like Figure 1 The pump casing shown has a plane A on its exterior and a conical surface B inside. The lower end of the conical surface B is a reference surface C. Plane A and reference surface C are parallel, and the distance between them is L. A bottom hole D is opened at the lower end of the pump casing 1. The diameter d1 of the bottom hole D is smaller than the diameter d2 at reference surface C. The finished pump casing 1 needs to control the parallelism between plane A and reference surface C, as well as the distance L. Existing tooling fixtures are used in conjunction with milling machines. Milling machines are suitable for making larger pump casings 1, but not so suitable for smaller pump casings 1. The existing processing solution is to use indexable leveling pads on a milling machine. However, milling machine processing has low accuracy, unstable quality, low automation, requires one person to operate one machine, and is costly. Moreover, this processing method can only first mill the surface on the milling machine, and then use the milled plane and the outer circle of the casting for positioning to process the reverse side, resulting in low positioning accuracy of the casting surface. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a pump casing self-extension positioning fixture to solve the problems of low precision when the fixture holds the pump casing and the fixture being unsuitable for turning, resulting in unstable processing quality and low efficiency of the pump casing.

[0004] The technical solution adopted by this invention to solve its technical problem is:

[0005] A pump casing self-extension positioning fixture is provided, including:

[0006] The support base is fixedly connected to the chuck at its lower end and is adapted to be inserted into the bottom hole D of the pump housing at its upper end.

[0007] A limiting support mechanism is installed on the support base; when the pump casing is pressed down, the B-cone surface of the pump casing triggers the limiting support mechanism so that the limiting support mechanism provides limiting support to the C-reference surface of the pump casing, thereby limiting and supporting the pump casing at a predetermined depth.

[0008] A chuck, the center of which is fixedly connected to a support base, and the jaws of the chuck are adapted to clamp the pump housing that is limited and supported.

[0009] Furthermore, the support base includes

[0010] The base is fixedly positioned at the center of the disc body;

[0011] A plurality of equidistant rods, the lower end of which is fixedly connected with the base, and the upper end of which is connected with the top base;

[0012] The top base is fixedly connected with each equidistant rod, and a disc hole is formed in the middle of the top base.

[0013] Further, the limiting support mechanism comprises

[0014] A mandrel, the lower end of which is fixedly connected with the base, and the upper end of which extends into the disc hole;

[0015] A core disc, which is adapted to be elastically moved up and down in the disc hole, the mandrel passes through the core disc and forms a sliding fit with the core disc, a plurality of guide inclined surfaces are arranged around the core disc, and the number of the guide inclined surfaces is the same as that of the limiting support rods;

[0016] A plurality of limiting support rods, each of which is uniformly distributed around the disc hole and is elastically moved in the top base, a roller is arranged at the inner end of the limiting support rod, and the roller is adapted to cooperate with the guide inclined surface;

[0017] A tension spring, one end of which is connected with the top base, and the other end of which is connected with the limiting support rod, so that the limiting support rod is kept to move inwardly;

[0018] When the pump shell is pressed down, the B conical surface is adapted to contact the upper end of the core disc, so as to drive the core disc to move downwardly, and when the core disc moves downwardly, each limiting support rod is driven to extend radially outwardly, so that each extended limiting support rod supports and limits the C reference surface of the pump shell.

[0019] Further, a limiting screw is arranged on the base, the limiting screw passes through the core disc, an adjusting compression spring is arranged on the limiting screw, and the compression spring abuts against the core disc, so as to keep the core disc to move upwardly.

[0020] Further, a plurality of pads are arranged at the upper end of the core disc, and the pads have an L-shaped structure.

[0021] Further, the limiting support rod has a T-shaped structure in cross section, and a "cross" shaped sliding groove is formed in the core disc.

[0022] The pump shell self-extending and positioning tool clamp has the following beneficial effects: each limiting support rod is driven to extend radially outwardly by pressing down the pump shell, so as to support and limit the pump shell, and after clamping by the chuck, turning processing can be performed, after the pump shell is taken away upwardly, each limiting support rod is automatically retracted along with the automatic lifting of the core disc, the clamping process of the pump shell is more convenient, the clamping efficiency is improved, and the precision is also guaranteed. BRIEF DESCRIPTION OF DRAWINGS

[0023] The application will be further described below with reference to the drawings.

[0024] Figure 1is a half cutaway view of the pump shell;

[0025] Figure 2 is a schematic view of the self-extendable positioning fixture for the pump shell of the present application when not clamped;

[0026] Figure 3 is a schematic view of the self-extendable positioning fixture for the pump shell of the present application (without chuck);

[0027] Figure 4 is a structural view of the core disc and three limiting support rods;

[0028] Figure 5 is a schematic view of the self-extendable positioning fixture for the pump shell of the present application when the three limiting support rods are in the open state;

[0029] Figure 6 is an axonometric view of the self-extendable positioning fixture for the pump shell of the present application when clamping the pump shell;

[0030] Figure 7 is a half cutaway view of the self-extendable positioning fixture for the pump shell of the present application when clamping the pump shell;

[0031] wherein 1 is the pump shell;

[0032] 2 is the chuck, 21 is the disc body, and 22 is the clamping jaw;

[0033] 3 is the support seat, 31 is the base, 32 is the equidistant rod, and 33 is the top seat;

[0034] 4 is the limiting support mechanism, 41 is the core shaft, 42 is the core disc, 421 is the guide inclined surface, 43 is the limiting support rod, 44 is the tension spring, and 45 is the roller;

[0035] 51 is the limiting screw, 52 is the compression spring, and 6 is the cushion block. DETAILED DESCRIPTION

[0036] The present application will now be further described with reference to the accompanying drawings. These drawings are simplified schematic views which only schematically illustrate the basic structure of the present application, and thus only show the components relevant to the present application.

[0037] As shown in the drawings, a self-extendable positioning fixture for a pump shell 1 comprises Figures 1 to 7

[0038] 3 is the support seat, the lower end of which is fixedly connected to the chuck 2, and the upper end of which is adapted to be inserted into the D bottom hole of the pump shell 1;

[0039] 4 is the limiting support mechanism, which is arranged on the support seat 3; when the pump shell 1 is pressed down, the B conical surface of the pump shell 1 triggers the limiting support mechanism 4, so that the limiting support mechanism 4 supports and limits the C reference surface of the pump shell 1, thereby limiting and supporting the pump shell 1 at a predetermined depth; ​

[0040] A chuck 2 is fixedly connected with the support base 3 at the center of the disc body 21, and each chuck claw 22 of the chuck 2 is adapted to clamp the pump shell 1 supported by the limiting support.

[0041] Specifically, as an optional embodiment in the present embodiment, as shown in Figure 2 Figure 3 Figure 5 As shown, the support base 3 comprises

[0042] A base 31 is fixedly arranged at the center of the disc body 21;

[0043] A plurality of equidistant rods 32 are fixedly connected with the base 31 at the lower end and connected with the top base 33 at the upper end;

[0044] The top base 33 is fixedly connected with each equidistant rod 32, and a disc hole is formed in the middle of the top base 33.

[0045] The top base 33 is a disc structure, and the diameter of the top base 33 is smaller than the diameter d2 of the D bottom hole of the pump shell 1, so that the top base 33 can be inserted into the pump shell 1.

[0046] The number of equidistant rods 32 is three, and the top base 33 is supported by the three equidistant rods 32, which ensures the parallelism of the top base 33 relative to the base 31, that is, the parallelism between the top base 33 and the chuck 2.

[0047] Specifically, as an optional embodiment in the present embodiment, as shown in Figure 3 Figure 4 As shown, the limiting support mechanism 4 comprises

[0048] A mandrel 41 is fixedly connected with the base 31 at the lower end and extends into the disc hole at the upper end;

[0049] A core disc 42 is adapted to be elastically moved up and down in the disc hole, the mandrel 41 passes through the core disc 42 and forms a sliding fit with the core disc 42, and a plurality of guide inclined surfaces 421 are arranged around the core disc 42, and the number of the guide inclined surfaces 421 is the same as that of the limiting support rods 43;

[0050] A plurality of limiting support rods 43 are circumferentially and uniformly arranged around the disc hole and are elastically moved in the top base 33, the inner end of each limiting support rod 43 is provided with a roller 45, and the roller 45 is adapted to cooperate with the guide inclined surface 421;

[0051] A tension spring 44 is connected with the top base 33 at one end and connected with the limiting support rod 43 at the other end, so that the limiting support rod 43 is kept to move inward;

[0052] The B conical surface is adapted to contact the upper end of the core disc 42 to drive the core disc 42 to move downwards, and the core disc 42 moves downwards to drive each limiting support rod 43 to extend radially outward to limit and support the C reference surface of the pump shell 1.

[0053] In the embodiment, the cross section of the limiting support rod 43 is T-shaped structure, and the core disc 42 is provided with a cross-shaped sliding groove.

[0054] The limiting support rod 43 moves radially in the sliding groove, and the tension spring 44 is also located in the sliding groove, and under the action of the tension spring 44, the roller 45 on the limiting support rod 43 is always pressed against the guide inclined surface 421 of the core disc 42.

[0055] When working, as shown in Figure 5 Figure 7 With the core disc 42 moving downwards, the guide inclined surface 421 presses the roller 45 to drive the limiting support rod 43 to move outward, and the extended limiting support rod 43 can support the pump shell 1.

[0056] Specifically, as an optional embodiment in the embodiment, as shown in Figure 3 The limiting screw 51 is arranged on the base 31, the limiting screw 51 passes through the core disc 42, the adjusting compression spring 52 is arranged on the limiting screw 51, and the compression spring 52 abuts against the core disc 42 to keep the core disc 42 moving upward.

[0057] When the pump shell 1 is taken away from the core disc 42, the core disc 42 is bounced upward to reset under the action of the compression spring 52 until the core disc 42 abuts against the bolt head at the upper end of the limiting screw 51, and the core disc 42 is reset.

[0058] Specifically, as an optional embodiment in the embodiment, as shown in Figure 2 The upper end of the core disc 42 is provided with a plurality of pad blocks 6, and the pad blocks 6 are L-shaped structures. The horizontal edges of the pad blocks 6 extend out of the core disc 42, so that the core disc 42 is in advance contacted with the B conical surface of the pump shell 1 through the pad blocks 6

[0059] The working method of the self-extending and retracting positioning tool clamp of the pump shell 1 is as follows:

[0060] Before the pump shell 1 is installed, the core disc 42 is in a lifting state under the action of the compression spring 52, and each limiting support rod 43 is retracted in the sliding groove.

[0061] When the pump shell 1 is installed, the top base 33 is inserted into the pump shell 1, the B conical surface of the pump shell 1 is contacted with the pad blocks 6 to drive the core disc 42 to move downwards, the movement of the core disc 42 presses the roller 45 to drive each limiting support rod 43 to extend outward, as shown in Figure 5As shown, the extended limit support rods 43 define the final depth of the pump housing 1 that can be moved downward, which is the preset depth, such as Figure 7 As shown, after the pump housing 1 is rested on the three limit support rods 43, the chuck 2 can clamp the pump housing 1 through the clamping jaws 22. Based on the above ideal embodiments of the present application, through the above description, relevant personnel can make various changes and modifications without deviating from the technical idea of the present application. The technical scope of the present application is not limited to the content of the specification, and the technical scope must be determined according to the scope of claims.

Claims

1. A pump casing self-expanding positioning fixture, characterized in that, include The support base is fixedly connected to the chuck at its lower end and is adapted to be inserted into the bottom hole D of the pump housing at its upper end. A limiting support mechanism is installed on the support base; when the pump casing is pressed down, the B-cone surface of the pump casing triggers the limiting support mechanism so that the limiting support mechanism provides limiting support to the C-reference surface of the pump casing, thereby limiting and supporting the pump casing at a predetermined depth. A chuck, wherein the center of the chuck body is fixedly connected to a support base, and each jaw of the chuck is adapted to clamp the pump casing of the limiting support. The support base includes The base is fixedly positioned at the center of the disc body; Multiple equidistant rods, the lower ends of which are fixedly connected to the base, and the upper ends of which are connected to the top seat; A top seat is fixedly connected to each equidistant rod, and a disc hole is opened in the middle of the top seat; The limiting support mechanism includes The spindle has its lower end fixedly connected to the base and its upper end extending into the disc hole; The core disk is adapted to move up and down elastically within the disk hole. The spindle passes through the core disk and forms a sliding fit with the core disk. Multiple guide slopes are provided around the core disk, and the number of guide slopes is the same as the number of limiting support rods. Multiple limiting support rods are provided, each of which is circumferentially distributed around the disc hole and is elastically movable within the top seat. Rollers are provided at the inner ends of the limiting support rods, and the rollers are adapted to cooperate with the guide slope. A tension spring, one end of which is connected to a top seat, and the other end of which is connected to a limiting support rod, so that the limiting support rod is kept moving inward; When the pump casing is pressed down, the B-cone surface is adapted to contact the upper end of the core disk to drive the core disk to move downward. When the core disk moves downward, it drives each limiting support rod to extend radially outward so that the extended limiting support rods provide limiting support to the C reference surface of the pump casing.

2. The pump casing self-expanding positioning fixture according to claim 1, characterized in that, A limiting screw is provided on the base, which passes through the core disk. An adjustable compression spring is mounted on the limiting screw, and the compression spring abuts against the core disk to keep the core disk moving upward.

3. The pump casing self-expanding positioning fixture according to claim 1, characterized in that, Multiple pads are provided on the upper end of the core disk, and the pads are L-shaped.

4. The pump casing self-expanding positioning fixture according to claim 1, characterized in that, The limiting support rod has a T-shaped cross-section, and a cross-shaped groove is opened on the core disk.

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