Compressor pumping crankshaft thrust surface positioning mechanism

Abstract

The utility model discloses a compressor pumping crankshaft thrust surface positioning mechanism. The compressor pumping crankshaft thrust surface positioning mechanism comprises a positioning seat for placing a crankshaft and a positioning assembly for axially positioning a short shaft side thrust surface of the crankshaft, the positioning assembly comprises a fixing seat, a guide rod is arranged on the fixing seat in a sliding fit mode, a first connecting piece is fixedly arranged at the end, facing the positioning seat, of the guide rod, and a thrust face positioning block is fixedly arranged at the end, facing the positioning seat, of the first connecting piece. A central shaft hole matched with a short shaft of the crankshaft is formed in the middle of the thrust surface positioning block, and the central axis of the central shaft hole is parallel to the central axis of the guide rod; and a positioning driving piece for driving the guide rod to slide is arranged on the fixed seat. According to the positioning mechanism, the short shaft side thrust surface can be positioned before the crankshaft is machined, on one hand, the problem of grinding wheel collision caused by feeding and discharging deviation is avoided, and on the other hand, compared with an existing measuring instrument, the positioning mechanism is low in manufacturing cost and low in cost.

Description

Technical Field

[0001] The utility model belongs to the technical field of compressor pumps, and in particular relates to a compressor pump crankshaft thrust surface positioning mechanism. Background Art

[0002] The structure of the compressor crankshaft is as follows Figure 1 As shown in the figure, most of the crankshaft thrust surface grinding machines currently used for machining crankshaft thrust surfaces are automatically loaded and unloaded. Due to the deviation of the loading position, the position of the short shaft thrust surface to be machined is deviated, resulting in the risk of collision with the grinding wheel during the machining of the crankshaft thrust surface, leading to losses. In order to avoid the risk of collision with the grinding wheel, a measuring instrument is required to locate the position of the short shaft thrust surface to be machined before machining the crankshaft. The measuring instrument usually uses a Marposs side head, which is relatively expensive.

[0003] Based on the above problems, the present application proposes a compressor pump crankshaft thrust surface positioning mechanism to realize the positioning of the short shaft side thrust surface before crankshaft processing. On the one hand, it avoids the problem of grinding wheel collision caused by loading and unloading deviations. On the other hand, compared with the Marposs side head, the positioning mechanism of the present application has low cost and low cost. Utility Model Content

[0004] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a compressor pump crankshaft thrust surface positioning mechanism.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A compressor pump crankshaft thrust surface positioning mechanism, comprising a positioning seat for placing the crankshaft and a positioning component for axially positioning the thrust surface on the short shaft side of the crankshaft;

[0007] The positioning assembly comprises a fixed seat, a guide rod is slidably fitted on the fixed seat, a first connecting piece is fixedly arranged on one end of the guide rod facing the positioning seat, and a thrust surface positioning block is fixedly arranged on one end of the first connecting piece facing the positioning seat;

[0008] A central axis hole matching the short axis of the crankshaft is provided in the middle of the thrust surface positioning block, and the central axis of the central axis hole is parallel to the central axis of the guide rod;

[0009] The fixing seat is provided with a positioning driving member for driving the guide rod to slide.

[0010] Preferably, the positioning seat is provided with a semi-cylindrical groove matched with the major axis of the crankshaft, and the central axis of the semi-cylindrical groove is parallel to the central axis of the central shaft hole.

[0011] Preferably, a bearing seat is arranged on the fixing seat, and the bearing seat is slidably matched with the guide rod via a linear bearing.

[0012] Preferably, the positioning drive member is a cylinder, and the piston rod end of the cylinder is fixedly connected to the first connecting member via a second connecting member;

[0013] The central axis of the cylinder piston rod is parallel to the central axis of the central axis hole.

[0014] Preferably, a mounting plate is fixedly arranged on the bearing seat, and a second proximity switch for sensing the extended position of the end of the cylinder piston rod and a first proximity switch for sensing the retracted reset position of the end of the cylinder piston rod are arranged on the mounting plate;

[0015] The thrust surface positioning block is provided with a third proximity switch for sensing the position of the end face of the crankshaft stub extending into the central shaft hole.

[0016] Preferably, a buffer seat is fixedly arranged at the end of the positioning seat away from the fixing seat, and a buffer hole is arranged on the end surface of the buffer seat facing the thrust surface positioning block, and a buffer column is slidably fitted in the buffer hole;

[0017] A buffer spring is fixedly arranged at the end of the buffer column located in the buffer hole, and the other end of the buffer spring is fixedly connected to the inner end of the buffer hole.

[0018] Preferably, a slide groove extending in the axial direction is arranged on the outer wall surface of the buffer column, and a bolt pressing toward the slide groove is arranged on the buffer seat.

[0019] The beneficial effects of the utility model are:

[0020] The positioning mechanism of the utility model can realize the positioning of the thrust surface on the short shaft side before the crankshaft is processed. On the one hand, it avoids the problem of collision with the grinding wheel caused by the deviation of loading and unloading materials. When used in conjunction with the grinding machine equipment, the rounding mechanism makes the thrust surface on the short shaft side of the crankshaft close to the thrust surface positioning block before pressing down on the crankshaft to ensure the consistency of positioning each time, thereby eliminating the influence of the machining error of the short shaft length of the crankshaft itself on the thrust surface grinding; on the other hand, compared with the existing measuring instruments, the positioning mechanism of the utility model has low cost and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings in the specification, which constitute a part of the present application, are used to provide further understanding of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute improper limitations on the present application.

[0022] Figure 1 It is a schematic diagram of the structure of the compressor crankshaft;

[0023] Figure 2 This is a schematic structural stereogram of the thrust surface positioning mechanism of the crankshaft of the compressor pump of the utility model;

[0024] Figure 3 This is a schematic front view of the structure of the thrust surface positioning mechanism of the crankshaft of the compressor pump of the utility model;

[0025] Figure 4 It is a structural schematic diagram of the buffer seat of the utility model;

[0026] Figure 5 It is a schematic diagram of the structure when the compressor crankshaft is tilted;

[0027] in:

[0028] 0-crankshaft;

[0029] 1-positioning seat, 11-buffer seat, 111-buffer hole, 112-buffer column, 113-buffer spring, 114-slide groove, 115-bolt, 2-fixed seat, 21-bearing seat, 22-mounting plate, 3-guide rod, 4-first connecting piece, 5-thrust surface positioning block, 51-center axis hole, 6-cylinder, 61-second connecting piece, 7-first proximity switch, 8-second proximity switch, 9-third proximity switch. DETAILED DESCRIPTION

[0030] It should be noted that the following detailed descriptions are illustrative and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0031] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0032] In the present invention, the directions or positional relationships indicated by terms such as "upper", "lower", "bottom", "top", etc. are based on the directions or positional relationships shown in the accompanying drawings. They are relational words determined only for the convenience of describing the structural relationships of the various parts or elements of the present invention. They do not specifically refer to any part or element in the present invention and cannot be understood as limitations on the present invention.

[0033] In the present utility model, terms such as "connected" and "connection" should be understood in a broad sense, indicating that the connection can be fixed, integral or detachable; it can be directly connected or indirectly connected through an intermediate medium. For relevant scientific research or technical personnel in this field, the specific meaning of the above terms in the present utility model can be determined according to specific circumstances, and it cannot be understood as a limitation of the present utility model.

[0034] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0035] like Figure 2-3 As shown, a compressor pump crankshaft thrust surface positioning mechanism includes a positioning seat 1 for placing a crankshaft 0 and a positioning component for axially positioning the thrust surface on the short shaft side of the crankshaft 0;

[0036] The positioning assembly comprises a fixed seat 2, a guide rod 3 is slidably fitted on the fixed seat 2, a first connecting member 4 is fixedly arranged on one end of the guide rod 3 facing the positioning seat 1, and a thrust surface positioning block 5 is fixedly arranged on one end of the first connecting member 4 facing the positioning seat 1;

[0037] A central axis hole 51 adapted to the short axis of the crankshaft 0 is provided in the middle of the thrust surface positioning block 5, and the central axis of the central axis hole 51 is parallel to the central axis of the guide rod 3;

[0038] The fixing seat 2 is provided with a positioning driving member for driving the guide rod 3 to slide.

[0039] Preferably, the positioning seat 1 is provided with a semi-cylindrical groove matched with the long axis of the crankshaft 0, and the central axis of the semi-cylindrical groove is parallel to the central axis of the central shaft hole 51.

[0040] Preferably, a bearing seat 21 is provided on the fixing seat 2, and the bearing seat 21 is slidably matched with the guide rod 3 via a linear bearing.

[0041] Preferably, the positioning driving member is a cylinder 6, and the piston rod end of the cylinder 6 is fixedly connected to the first connecting member 4 through a second connecting member 61;

[0042] The central axis of the piston rod of the cylinder 6 is parallel to the central axis of the central axis hole 51 .

[0043] Preferably, a mounting plate 22 is fixedly arranged on the bearing seat 21, and a second proximity switch 8 for sensing the extended position of the piston rod end of the cylinder 6 and a first proximity switch 7 for sensing the retracted reset position of the piston rod end of the cylinder 6 are arranged on the mounting plate 22;

[0044] The thrust surface positioning block 5 is provided with a third proximity switch 9 for sensing the position of the short axis end surface of the crankshaft 0 extending into the central axis hole 51.

[0045] In the present application, the first proximity switch 7 is used to sense the retraction and reset of the piston rod of the cylinder 6; the second proximity switch 8 is used to sense the extension length of the piston rod of the cylinder 6, so as to ensure the axial positioning of the thrust surface positioning block 5 on the thrust surface on the short axis side of the crankshaft 0; the third proximity switch 9 is used to sense whether the short axis end face of the crankshaft 0 extends into the center axis hole 51, so as to detect whether the long axis of the crankshaft 0 is stuck in the semi-cylindrical groove.

[0046] Preferably, a buffer seat 11 is fixedly arranged at the end of the positioning seat 1 away from the fixing seat 2. Figure 4 As shown, a buffer hole 111 is provided on the end surface of the buffer seat 11 facing the thrust surface positioning block 5, and a buffer column 112 is slidably fitted in the buffer hole 111;

[0047] A buffer spring 113 is fixedly disposed at the end of the buffer column 112 located in the buffer hole 111 , and the other end of the buffer spring 113 is fixedly connected to the inner end of the buffer hole 111 .

[0048] At the moment when the piston rod of the cylinder 6 stops extending, the crankshaft 0 will continue to move toward the buffer seat 11 due to inertia. The buffer spring 113 in the buffer seat 11 is used to buffer the inertial movement of the crankshaft 0.

[0049] Preferably, a slide groove 114 extending in the axial direction is provided on the outer wall surface of the buffer column 112 , and a bolt 115 pressing toward the slide groove 114 is provided on the buffer seat 11 .

[0050] The bolt 115 cooperates with the slide groove 114 to limit the axial movement of the buffer column 112 , thereby preventing the buffer column 112 from falling out of the buffer hole 111 .

[0051] A compressor pump crankshaft thrust surface positioning mechanism, the specific implementation of which is as follows:

[0052] After the crankshaft 0 is loaded onto the positioning seat 1, the piston rod of the cylinder 6 extends to drive the guide rod 3, the first connecting member 4, the second connecting member 61, and the thrust surface positioning block 5 to move toward the direction of the crankshaft 0. During this process, the end surface of the thrust surface positioning block 5 pushes against the crankshaft 0 to enable it to reach the preset position;

[0053] After the crankshaft 0 is stationary, if the second proximity switch 8 senses that the piston rod end of the cylinder 6 has reached the set position and the third sensing switch 9 senses that the short shaft end face of the crankshaft 0 extends into the central shaft hole 51 and reaches the preset position, it indicates that the short shaft side thrust surface of the crankshaft 0 is positioned. Then the pressing mechanism on the grinding machine presses the crankshaft 0. Before the pressing mechanism presses down on the crankshaft 0, the short shaft side thrust surface of the crankshaft 0 is pressed against the thrust surface positioning block 5 to ensure consistent positioning each time, thereby eliminating the influence of the crankshaft 0 itself on the thrust surface grinding due to the machining error of the short shaft length; then the piston rod of the cylinder 6 drives the guide rod 3, the first connecting member 4, the second connecting member 61, and the thrust surface positioning block 5 to reset. When the first proximity switch 7 senses that the piston rod of the cylinder 6 has been reset, the grinding machine starts to process the short shaft side thrust surface of the crankshaft.

[0054] After the crankshaft 0 is stationary, if the third induction switch 9 does not sense that the end face of the short axis of the crankshaft 0 has reached the preset position in the central axis hole 51, it means that the long axis of the crankshaft 0 is not stuck in the semi-cylindrical groove and is tilted. Figure 5 As shown, regardless of whether the second proximity switch 8 senses that the piston rod end of the cylinder 6 has reached the set position, it indicates that the short-axis thrust surface of the crankshaft 0 has not been successfully positioned, and the operator needs to check.

[0055] The positioning mechanism of the present application can realize the positioning of the thrust surface on the short shaft side before the crankshaft 0 is processed. On the one hand, it avoids the problem of collision with the grinding wheel caused by the deviation of loading and unloading. When used in conjunction with the grinding machine equipment, the pressing mechanism makes the thrust surface on the short shaft side of the crankshaft 0 close to the thrust surface positioning block 5 before pressing down to the crankshaft 0, so as to ensure the consistency of positioning each time, thereby eliminating the influence of the machining error of the short shaft length of the crankshaft 0 itself on the thrust surface grinding; on the other hand, compared with the existing measuring instruments, the positioning mechanism of the present application has low cost and low cost.

[0056] Although the above describes the specific implementation mode of the utility model in combination with the accompanying drawings, it is not a limitation of the utility model. Technical personnel in the relevant field should understand that on the basis of the technical solution of the utility model, various modifications or deformations that can be made by technical personnel in this field without creative work are still within the protection scope of the utility model.

Claims

1. A compressor pump crankshaft thrust surface positioning mechanism, characterized in that: It includes a positioning seat for placing the crankshaft and a positioning assembly for axially positioning the thrust surface on the short shaft side of the crankshaft; The positioning assembly comprises a fixed seat, a guide rod is slidably fitted on the fixed seat, a first connecting piece is fixedly arranged on one end of the guide rod facing the positioning seat, and a thrust surface positioning block is fixedly arranged on one end of the first connecting piece facing the positioning seat; A central axis hole matching the short axis of the crankshaft is provided in the middle of the thrust surface positioning block, and the central axis of the central axis hole is parallel to the central axis of the guide rod; The fixing seat is provided with a positioning driving member for driving the guide rod to slide.

2. The compressor pump crankshaft thrust surface positioning mechanism according to claim 1, characterized in that: The positioning seat is provided with a semi-cylindrical groove matched with the major axis of the crankshaft, and the central axis of the semi-cylindrical groove is parallel to the central axis of the central shaft hole.

3. The compressor pump crankshaft thrust surface positioning mechanism according to claim 1, characterized in that: A bearing seat is arranged on the fixing seat, and the bearing seat is slidably matched with the guide rod through a linear bearing.

4. The compressor pump crankshaft thrust surface positioning mechanism according to claim 1, characterized in that: The positioning driving member is a cylinder, and the piston rod end of the cylinder is fixedly connected to the first connecting member through the second connecting member; The central axis of the cylinder piston rod is parallel to the central axis of the central axis hole.

5. The compressor pump crankshaft thrust surface positioning mechanism according to claim 3, characterized in that: A mounting plate is fixedly arranged on the bearing seat, and a second proximity switch for sensing the extended position of the end of the cylinder piston rod and a first proximity switch for sensing the retracted reset position of the end of the cylinder piston rod are arranged on the mounting plate; The thrust surface positioning block is provided with a third proximity switch for sensing the position of the end face of the crankshaft stub extending into the central shaft hole.

6. The compressor pump crankshaft thrust surface positioning mechanism according to claim 1, characterized in that: A buffer seat is fixedly arranged at the end of the positioning seat away from the fixing seat, and a buffer hole is arranged on the end surface of the buffer seat facing the thrust surface positioning block, and a buffer column is slidably fitted in the buffer hole; A buffer spring is fixedly arranged at the end of the buffer column located in the buffer hole, and the other end of the buffer spring is fixedly connected to the inner end of the buffer hole.

7. The compressor pump crankshaft thrust surface positioning mechanism according to claim 6, characterized in that: A sliding groove extending in the axial direction is arranged on the outer wall surface of the buffer column, and a bolt pressing toward the sliding groove is arranged on the buffer seat.

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