Extrusion forming plunger pump special-shaped sliding shoe closing-up tool

Abstract

The utility model provides an extrusion forming plunger pump special-shaped sliding shoe closing tool which comprises a sliding shoe and a plunger, a ball head of the plunger is inserted into a ball socket of the sliding shoe, the sliding shoe is sleeved with an extrusion sleeve, the plunger is sleeved with a cushion sleeve, the opening end of the cushion sleeve is provided with a forming sleeve, the sliding shoe is provided with a protruding part, and the protruding part is connected with the extrusion sleeve. When the extrusion sleeve and the cushion sleeve get close to each other, the protruding part and the forming sleeve extrude each other. The special-shaped closing opening of the sliding shoe expands the limitation of traditional sliding shoe closing opening, the structure can be adjusted according to different indexes, and therefore the most suitable sliding shoe closing opening is screened out, and more possibilities are provided for improving the sliding shoe closing opening quality.

Description

Technical Field

[0001] The utility model belongs to the technical field of plunger pump sliding shoes, in particular to an extrusion-molded plunger pump special-shaped sliding shoe closing tool. Background Art

[0002] The plunger pump is a hydraulic pump that uses multiple plungers to reciprocate in a cylinder bore to output high-pressure oil. The plunger shoe assembly is the core component of the hydraulic pump and directly affects the performance of the plunger pump. Since the shoe swings the plunger, the shoe and the plunger must be connected by a ball joint.

[0003] Before the plunger boot is installed on the plunger pump, the plunger boot must be closed first. Closing means that the boot or plunger is squeezed and deformed by special tooling so that the ball head and the ball socket fit tightly. The plunger and boot can swing relative to each other around the center of the ball but cannot be separated.

[0004] The existing closing tooling has the following problems:

[0005] 1. It is large in size and easy to be damaged. Moreover, the pressure on the sliding shoe is applied mechanically, and the pressure process is difficult to control;

[0006] 2. During the closing process, the deformation of the sliding shoe or plunger is uneven, making it difficult for the inner spherical surface of the sliding shoe or plunger to fully fit with the outer spherical surface of the ball head, resulting in high contact pressure and increased local wear;

[0007] 3. Under impact load and alternating load, the plastic material of the closing mouth is easily deformed, increasing the axial clearance between the plunger and the sliding shoe. In severe cases, the plunger and the sliding shoe will completely separate, that is, the "shoe-off" phenomenon will occur.

[0008] For example, a plunger slipper disclosed in a Chinese invention patent with an authorization announcement date of 2024.03.12 and an authorization announcement number of CN114687978B includes a slipper and a plunger, the slipper including a slipper seat and a ball head rod detachably connected to the slipper seat, a ball head being fixed to the end of the ball head rod away from the slipper seat; a connecting assembly, the connecting assembly including an outer connecting sleeve and an inner connecting shaft threadedly connected to the inner side of the outer connecting sleeve, a ball socket being provided on the outer connecting sleeve and the inner connecting shaft, a ball head mounting hole being provided on the side of the outer connecting sleeve away from the inner connecting shaft, the diameter of the end of the inner connecting shaft away from the plunger passes through the center of the ball socket, and the end of the inner connecting shaft away from the outer connecting sleeve is detachably connected to the plunger.

[0009] In the above-mentioned prior art, the clearance accuracy between the inner wall of the ball socket and the ball head is improved, but the sliding shoe structure involved is a traditional structure, the closing part is cylindrical, the closing method is relatively simple, and there are limitations on various indicators for measuring the closing of the sliding shoe.

[0010] Therefore, how to effectively expand the limitations of traditional slippery shoe closures and provide more possibilities for improving the quality of slippery shoe closures is a technical problem that needs to be solved urgently. Utility Model Content

[0011] In view of the deficiencies in the above-mentioned background technology, the utility model proposes an extrusion-molded plunger pump special-shaped sliding shoe closing tooling, which solves the problems of limitations of traditional sliding shoe closing and a relatively single sliding shoe closing method.

[0012] The technical solution of this application is:

[0013] A tooling for closing a special-shaped sliding shoe of an extruded plunger pump comprises a sliding shoe and a plunger, wherein the ball head of the plunger is inserted into the ball socket of the sliding shoe, the outer part of the sliding shoe is sleeved with an extrusion sleeve, the outer part of the plunger is sleeved with a cushion sleeve, the open end of the cushion sleeve is provided with a molding sleeve, and the sliding shoe is provided with a protrusion, and when the extrusion sleeve and the cushion sleeve are close to each other, the protrusion and the molding sleeve are squeezed against each other.

[0014] Furthermore, the protrusion is arranged along the outer circumference of the inner end of the sliding shoe, and the cross-section of the protrusion along the axial direction of the plunger is approximately triangular, which provides more options for improving the closing quality of the sliding shoe.

[0015] Furthermore, the protrusion includes an arc-shaped sliding shoe closing, which provides more options for improving the closing quality of the sliding shoe.

[0016] Furthermore, a gap is provided between the inner side wall of the sliding shoe and the ball head of the plunger.

[0017] Furthermore, the inner diameter of the forming sleeve gradually decreases from the outside to the inside, and the cross-section of the forming sleeve along the axial direction of the plunger is an arc-shaped surface, three sides of the arc-shaped surface are straight lines, and the other side of the arc-shaped surface is a circular arc.

[0018] Furthermore, the radius of the arc is the sum of the radius of the ball head and the wall thickness of the shoe, and the arc shape can be designed in series according to the product to meet the needs of various products without the need for major design of the overall tooling, which greatly saves costs.

[0019] Furthermore, a notch is provided at the open end of the cushion cover, and the forming sleeve is fitted with the notch.

[0020] Furthermore, the forming sleeve and the cushion sleeve are transitionally matched, and the gap between the two is as small as possible to facilitate assembly and disassembly.

[0021] Furthermore, a protective gasket is provided between the sliding shoe and the extrusion sleeve to prevent excessive movement and insufficient closing, and at the same time plays a role in protecting the end face of the sliding shoe.

[0022] Furthermore, a clearance groove is provided at the open end of the extrusion sleeve, and the outer surface of the cushion sleeve is fitted with the inner surface of the clearance groove.

[0023] The specific beneficial effects of the utility model include:

[0024] 1. The special-shaped closing of the sliding shoe expands the limitations of the traditional closing of the sliding shoe. The structure can be adjusted according to different indicators to select the most suitable closing of the sliding shoe, providing more possibilities for improving the quality of the closing of the sliding shoe;

[0025] 2. The forming sleeve is a replaceable part. When closing the special-shaped plunger shoes of various specifications, only the forming sleeve needs to be replaced, which can avoid waste caused by too exclusive tooling;

[0026] 3. The shape of the forming sleeve arc can be designed in series according to the product to meet the needs of various products without the need for major design of the overall tooling, which greatly saves costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 This is a schematic diagram of the use state of the utility model;

[0029] Figure 2 is a schematic diagram of a forming sleeve;

[0030] Figure 3 for Figure 1 Enlarged view of point A in the middle.

[0031] Description of Figure Numbers:

[0032] 1. Slipper; 2. Plunger;

[0033] 3. Extrusion sleeve; 4. Cushion sleeve;

[0034] 5. Molding sleeve; 6. Protective gasket;

[0035] 11. protrusion;

[0036] 21. Ball head. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0038] Example 1, an extrusion-molded plunger pump special-shaped sliding shoe closing tooling, such as Figure 1 As shown, it includes a sliding shoe 1 and a plunger 2, the ball head 21 of the plunger 2 is inserted into the ball socket of the sliding shoe 1, the outer part of the sliding shoe 1 is sleeved with an extrusion sleeve 3, the outer part of the plunger 2 is sleeved with a gasket sleeve 4, the open end of the gasket sleeve 4 is provided with a forming sleeve 5, and the sliding shoe 1 is provided with a protrusion 11. When the extrusion sleeve 3 and the gasket sleeve 4 are close to each other, the protrusion 11 and the forming sleeve 5 are squeezed against each other, wherein the sliding shoe 1 and the plunger 2 are processed components, which are deformed under the extrusion of the extrusion sleeve 3 and the forming sleeve 5 to achieve the purpose of closing the special-shaped sliding shoe.

[0039] On the basis of the above embodiment, the protrusion 11 is arranged along the outer periphery of the inner end of the sliding shoe 1, and the cross section of the protrusion 11 along the axial direction of the plunger 2 is approximately a right triangle. Figure 3 As shown, one right-angled side of the protrusion 11 is in contact with the shoe body, and the other right-angled side of the protrusion 11 is flush with the end of the shoe body. The hypotenuse is curved and slightly concave. The protrusion 11 and the forming sleeve 5 are pressed against each other, providing more options for improving the closing quality of the shoe.

[0040] On the basis of the above embodiment, a gap is provided between the inner wall of the slipper 1 and the ball head 21 of the plunger 2. When the protrusion 11 is squeezed with the forming sleeve 5, the gap between the protrusion 11 and the ball head 21 is gradually reduced until the protrusion 11 and the ball head 21 are completely fitted.

[0041] Based on the above implementation, Figure 2 As shown, the inner diameter of the forming sleeve 5 gradually decreases from the outside to the inside, and the cross section of the forming sleeve 5 along the axial direction of the plunger 2 is an arc-shaped surface, the three sides of the arc-shaped surface are straight lines, and the other side of the arc-shaped surface is an arc. Figure 2 As shown, the forming sleeve 5 is a replaceable part. When closing the special-shaped plunger boots of various specifications, only the forming sleeve 5 needs to be replaced, which can avoid waste caused by too exclusive tooling.

[0042] On the basis of the above implementation, the radius of the arc is the sum of the radius of the ball head 21 and the wall thickness of the sliding shoe 1 .

[0043] Specifically, the arc shape can be designed in series according to the product to be applicable to various product needs without the need for major design of the overall tooling, which greatly saves costs.

[0044] On the basis of the above embodiment, the opening end of the cushion cover 4 is provided with a notch, and the forming cover 5 fits with the notch.

[0045] On the basis of the above-mentioned embodiment, the forming sleeve 5 and the cushion sleeve 4 are transitionally matched, and the gap between them is as small as possible to facilitate assembly and disassembly.

[0046] On the basis of the above-mentioned embodiment, a protective gasket 6 is arranged between the sliding shoe 1 and the extrusion sleeve 3. Specifically, when extrusion is performed, the outer end surface of the sliding shoe 1 is in contact with the inner surface of the extrusion sleeve 3, and the protective gasket 6 is arranged between the two. The protective gasket 6 should have high hardness and finish, and has two functions: one is to limit the position of the sliding shoe 1 to prevent excessive movement and insufficient closing; the other is to prevent indentation on the end surface of the sliding shoe 1, thereby protecting the end surface of the sliding shoe 1.

[0047] On the basis of the above embodiment, the opening end of the extrusion sleeve 3 is provided with a clearance groove, and the outer surface of the cushion sleeve 4 is in contact with the inner surface of the clearance groove. The function of the extrusion sleeve 3 is to bear the external force and transmit it to the forming sleeve 5, so that the forming sleeve 5 squeezes the sliding shoe 1 to deform to meet the requirements, and the force can be applied by a press or squeezed by a hard pipe crimping machine.

[0048] Example 2 is a preferred implementation of a tooling for closing a special-shaped shoe of an extruded plunger pump. It differs from Example 1 in that it includes a shoe 1 and a plunger 2, wherein the ball head 21 of the plunger 2 is inserted into the ball socket of the shoe 1, the outer portion of the shoe 1 is sleeved with an extrusion sleeve 3, the outer portion of the plunger 2 is sleeved with a gasket sleeve 4, the open end of the gasket sleeve 4 is provided with a molding sleeve 5, and the shoe 1 is provided with a protrusion 11. When the extrusion sleeve 3 and the gasket sleeve 4 are close to each other, the protrusion 11 and the molding sleeve 5 are squeezed against each other, wherein the shoe 1 and the plunger 2 are processed components, which are deformed under the extrusion of the extrusion sleeve 3 and the molding sleeve 5 to achieve the purpose of closing the special-shaped shoe.

[0049] On the basis of the above embodiment, the protrusion 11 is arranged along the outer periphery of the inner end of the sliding shoe 1, and the cross section of the protrusion 11 along the axial direction of the plunger 2 is an arc-shaped surface. Figure 3 As shown, one right-angled side of the protrusion 11 is in contact with the shoe body, and the other right-angled side of the protrusion 11 is flush with the end of the shoe body. The hypotenuse is curved and slightly concave. The protrusion 11 and the forming sleeve 5 are pressed against each other, providing more options for improving the closing quality of the shoe.

[0050] On the basis of the above embodiment, a gap is provided between the inner wall of the slipper 1 and the ball head 21 of the plunger 2. When the protrusion 11 is squeezed with the forming sleeve 5, the gap between the protrusion 11 and the ball head 21 is gradually reduced until the protrusion 11 and the ball head 21 are completely fitted.

[0051] Based on the above implementation, Figure 2 As shown, the inner diameter of the forming sleeve 5 gradually decreases from the outside to the inside, and the cross section of the forming sleeve 5 along the axial direction of the plunger 2 is an arc-shaped surface, the three sides of the arc-shaped surface are straight lines, and the other side of the arc-shaped surface is an arc. Figure 2 As shown, the forming sleeve 5 is a replaceable part. When closing the special-shaped plunger boots of various specifications, only the forming sleeve 5 needs to be replaced, which can avoid waste caused by too exclusive tooling.

[0052] On the basis of the above implementation, the radius of the arc is the sum of the radius of the ball head 21 and the wall thickness of the sliding shoe 1 .

[0053] Specifically, the arc shape can be designed in series according to the product to be applicable to various product needs without the need for major design of the overall tooling, which greatly saves costs.

[0054] On the basis of the above embodiment, the opening end of the cushion cover 4 is provided with a notch, and the forming cover 5 fits with the notch.

[0055] On the basis of the above-mentioned embodiment, the forming sleeve 5 and the cushion sleeve 4 are transitionally matched, and the gap between them is as small as possible to facilitate assembly and disassembly.

[0056] On the basis of the above-mentioned embodiment, a protective gasket 6 is arranged between the sliding shoe 1 and the extrusion sleeve 3. Specifically, when extrusion is performed, the outer end surface of the sliding shoe 1 is in contact with the inner surface of the extrusion sleeve 3, and the protective gasket 6 is arranged between the two. The protective gasket 6 should have high hardness and finish, and has two functions: one is to limit the position of the sliding shoe 1 to prevent excessive movement and insufficient closing; the other is to prevent indentation on the end surface of the sliding shoe 1, thereby protecting the end surface of the sliding shoe 1.

[0057] On the basis of the above embodiment, the opening end of the extrusion sleeve 3 is provided with a clearance groove, and the outer surface of the cushion sleeve 4 is in contact with the inner surface of the clearance groove. The function of the extrusion sleeve 3 is to bear the external force and transmit it to the forming sleeve 5, so that the forming sleeve 5 squeezes the sliding shoe 1 to deform to meet the requirements, and the force can be applied by a press or squeezed by a hard pipe crimping machine.

[0058] The method of using the utility model is as follows:

[0059] (1) Install the forming sleeve 5 into the groove of the cushion sleeve 4;

[0060] (2) The sliding shoe 1 and the plunger 2 are assembled together, and the protective gasket 6 is pressed against the bottom surface of the sliding shoe 1 and placed in the assembled molding sleeve 5;

[0061] (3) Align the extrusion sleeve 3 and the cushion sleeve 4, slowly merge them, and squeeze the extrusion sleeve 3 until it cannot be pressed;

[0062] (4) Place the assembled components under the press and slowly press until the extrusion sleeve is combined. Keep for 1 minute to complete the closing work.

[0063] The parts not described in detail in the present invention are all conventional technical means known to those skilled in the art.

[0064] The above content shows and describes the basic principle, main features and beneficial effects of the utility model. The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An extrusion-molded plunger pump special-shaped sliding shoe closing tool, characterized in that: The invention comprises a sliding shoe (1) and a plunger (2), wherein a ball head (21) of the plunger (2) is inserted into a ball socket of the sliding shoe (1), an extrusion sleeve (3) is sleeved on the outside of the sliding shoe (1), a cushion sleeve (4) is sleeved on the outside of the plunger (2), a forming sleeve (5) is arranged at the open end of the cushion sleeve (4), and a protrusion (11) is arranged on the sliding shoe (1), and when the extrusion sleeve (3) and the cushion sleeve (4) are close to each other, the protrusion (11) and the forming sleeve (5) are pressed against each other.

2. The extrusion-molded plunger pump special-shaped sliding shoe closing tooling according to claim 1 is characterized in that: The protrusion (11) is arranged along the outer periphery of the inner end of the sliding shoe (1), and the cross section of the protrusion (11) along the axial direction of the plunger (2) is approximately triangular.

3. The extrusion-molded plunger pump special-shaped sliding shoe closing tooling according to claim 1 is characterized in that: The protrusion (11) is arranged along the outer periphery of the inner end of the sliding shoe (1), and the cross section of the protrusion (11) along the axial direction of the plunger (2) is an arc-shaped surface.

4. The extrusion-molded plunger pump special-shaped sliding shoe closing tooling according to any one of claims 1 to 3, characterized in that: A gap is provided between the inner side wall of the sliding shoe (1) and the ball head (21) of the plunger (2).

5. The extrusion-molded plunger pump special-shaped sliding shoe closing tooling according to claim 4 is characterized in that: The inner diameter of the forming sleeve (5) gradually decreases from the outside to the inside, and the cross-section of the forming sleeve (5) along the axial direction of the plunger (2) is an arc-shaped surface, three sides of the arc-shaped surface are straight lines, and the other side of the arc-shaped surface is an arc.

6. The extrusion-molded plunger pump special-shaped sliding shoe closing tooling according to claim 5, characterized in that: The radius of the circular arc is the sum of the radius of the ball head (21) and the wall thickness of the sliding shoe (1).

7. The extrusion-molded plunger pump special-shaped sliding shoe closing tooling according to any one of claims 1-3, 5-6, characterized in that: The opening end of the cushion sleeve (4) is provided with a notch, and the forming sleeve (5) fits in the notch.

8. The extrusion-molded plunger pump special-shaped sliding shoe closing tooling according to any one of claims 1-3, 5-6, characterized in that: The forming sleeve (5) and the cushion sleeve (4) are transitionally matched.

9. The extrusion-molded plunger pump special-shaped sliding shoe closing tooling according to any one of claims 1-3, 5-6, characterized in that: A protective gasket (6) is provided between the sliding shoe (1) and the extrusion sleeve (3).

10. The extrusion-molded plunger pump special-shaped sliding shoe closing tooling according to any one of claims 1-3, 5-6, characterized in that: The opening end of the extrusion sleeve (3) is provided with a clearance groove, and the outer surface of the cushion sleeve (4) fits with the inner surface of the clearance groove.

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