Connecting structure of piston rod and crosshead body

Abstract

The utility model relates to the technical field of connection of piston rods and crossheads, and particularly discloses a connection structure of a piston rod and a crosshead body, which comprises a crosshead body, a piston rod body is arranged at the upper end of the crosshead body, a positioning bolt is fixedly connected to the lower surface of the piston rod body, a groove is arranged on the upper surface of the crosshead body, and the positioning bolt is fixedly connected with the positioning bolt. And a limiting clamping block is mounted on the inner wall of the groove of the crosshead body. According to the connecting structure of the piston rod and the crosshead body, the extrusion clamping block and the first locking block are arranged, the crosshead body and the piston rod body are fixed through the positioning bolt, and meanwhile the positioning bolt and the limiting clamping block are fixed in a threaded mode, so that the piston rod body drives the extrusion clamping block to be clamped into an annular groove in the upper surface of the limiting clamping block; and a linkage sliding block is conveniently pushed by extruding a clamping block, then the linkage sliding block drives a first locking block to horizontally slide, the first locking block is clamped in a first limiting groove so as to fix a limiting clamping block and the crosshead body, and the stability of the device is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of piston rod and cross head connection, specifically to a connecting structure of piston rod and cross head body. BACKGROUND

[0002] Piston rod and cross head are very important components in reciprocating machinery, which play a key role in power transmission and motion conversion, the piston rod is usually an elongated cylindrical rod, which is usually made of high-quality carbon steel or alloy steel to ensure sufficient strength and rigidity, the surface is processed by high-precision machining and grinding, which has low surface roughness to reduce friction with other components and ensure good sealing, one end is connected with the piston, and the other end is connected with the cross head or other transmission components, according to different connection modes, the end part has corresponding threads, flanges or pin holes, the cross head is generally in the shape of a cross or a similar cross, which is composed of a head, a neck and connecting arms, and is usually made of high-strength cast iron or cast steel to withstand complex forces, the head is connected with the piston rod, the neck is installed in the slide, and the connecting arm is connected with the connecting rod, and each connecting part has corresponding mounting holes or matching surfaces to realize reliable connection with other components.

[0003] The existing piston rod and cross head are connected by threads, but the threads are prone to looseness during reciprocating motion, which causes the piston rod and cross head to deviate, reduces the stability of work, and is not conducive to increasing the overall practicability. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a connecting structure of piston rod and cross head body to solve the problem that the threads are prone to looseness during reciprocating motion, which causes the piston rod and cross head to deviate.

[0005] In order to achieve the above object, the utility model provides the following technical scheme: a connecting structure of a piston rod and a cross head body, which comprises a cross head body, the upper end of which is provided with a piston rod body, the lower surface of the piston rod body is fixedly connected with a positioning bolt, the upper surface of the cross head body is provided with a groove, and the inner wall of the cross head body groove is provided with a limiting block, the surface of the limiting block is provided with an opening, and the inner wall of the limiting block opening is provided with a mounting cavity, the lower surface of the piston rod body is fixedly connected with an extrusion block, the upper end side surface of the mounting cavity is provided with a first locking block, the upper surface of the first locking block is fixedly connected with a linkage sliding block, the inner wall of the cross head body groove is provided with a first limiting groove, the lower surface of the first locking block is fixedly connected with a first tooth block, and the inside of the mounting cavity is provided with a linkage locking mechanism.

[0006] Preferably, the positioning bolt and the cross head body constitute a threaded connection, the limiting block is designed in a cylindrical shape, and the opening on the surface of the limiting block is designed in a cylindrical shape, and the limiting block and the positioning bolt constitute a threaded connection.

[0007] The above technical scheme is adopted, the positioning bolt and the cross head body are fixed through threaded connection, and meanwhile the positioning bolt penetrates the opening on the surface of the limiting block.

[0008] Preferably, the extrusion block is designed in a ring shape, and the cross section of the extrusion block is designed in an arc shape, the side surface of the first locking block penetrates the side surface of the limiting block.

[0009] The above technical scheme is adopted, through the ring shape design of the extrusion block, the extrusion block is convenient for pushing the linkage sliding block to slide horizontally.

[0010] Preferably, the first locking block and the limiting block constitute a sliding connection, and a spring is connected between the first locking block and the limiting block, the upper end of the linkage sliding block penetrates the upper surface of the limiting block, and the side surface of the linkage sliding block is designed to be inclined, the upper surface of the limiting block has a ring-shaped groove, and the first limiting groove is correspondingly arranged with the first locking block.

[0011] The above technical scheme is adopted, the first locking block is driven by the linkage sliding block to move, and it is convenient to engage the first limiting groove.

[0012] Preferably, the linkage locking mechanism comprises a transmission gear, the transmission gear is arranged on the inner wall of the mounting cavity, the second locking block is arranged on the inner wall of the mounting cavity, the upper surface of the second locking block is fixedly connected with a second tooth block, and the outer surface of the positioning bolt is provided with a second limiting groove.

[0013] Adopting the technical scheme, the first locking block slides to drive the first tooth block to move through the linkage locking mechanism.

[0014] Preferably, the transmission gear is rotatably connected with the mounting cavity, and the transmission gear is meshingly connected with the first tooth block and the second tooth block respectively.

[0015] Adopting the technical scheme, the first tooth block drives the transmission gear to rotate, and the transmission gear drives the second tooth block to move through the movement of the first tooth block.

[0016] Preferably, the second locking block penetrates through the inner wall of the mounting cavity opening, and the second locking block is slidably connected with the mounting cavity, and a spring is connected between the second locking block and the mounting cavity, and the second limiting groove is correspondingly arranged with the second locking block.

[0017] Adopting the technical scheme, the second locking block is extended and clamped in the second limiting groove through the sliding of the second tooth block.

[0018] Compared with the prior art, the piston rod and the cross head body connection structure of the utility model has the advantages that:

[0019] 1. The extrusion clamping block and the first locking block are arranged, so that when the device works, the cross head body and the piston rod body are fixed through the positioning bolt, and the positioning bolt is threadedly fixed with the limiting clamping block, so that the piston rod body drives the extrusion clamping block to be clamped into the annular groove in the upper surface of the limiting clamping block, the linkage sliding block is pushed through the extrusion clamping block, then the linkage sliding block drives the first locking block to slide horizontally, the first locking block is clamped into the first limiting groove, and the limiting clamping block and the cross head body are fixed, so that the stability of the device is increased.

[0020] 2. The first tooth block and the transmission gear are arranged, so that when the device works, the first tooth block on the surface of the first locking block drives the transmission gear to rotate, and the transmission gear drives the second tooth block and the second locking block to move, and the linkage reduces energy consumption and cost.

[0021] 3. The second tooth block and the second limiting groove are arranged, so that when the device works, the second locking block is clamped into the second limiting groove through the sliding of the second locking block, the rotation deviation of the positioning bolt is prevented, the stability of the positioning bolt is increased, the stability between the cross head body, the piston rod body, the positioning bolt and the limiting clamping block is effectively increased, and the loosening failure is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a whole front view structural schematic diagram of the utility model;

[0023] Figure 2The utility model discloses a cross head body and limit card piece connection front view structure schematic diagram,

[0024] Figure 3 The utility model discloses a whole front view structure schematic diagram,

[0025] Figure 4 The utility model discloses Figure 3 The utility model discloses a first locking block and linkage sliding block connection three-dimensional structure schematic diagram,

[0026] Figure 5 The utility model discloses a first locking block and linkage sliding block connection three-dimensional structure schematic diagram,

[0027] Figure 6 The utility model discloses a second locking block and second tooth block connection three-dimensional structure schematic diagram.

[0028] In the drawing: 1, cross head body;2, piston rod body;3, locating bolt;4, limit card piece;5, installation cavity;6, extrusion card piece;7, first locking block;8, linkage sliding block;9, first limit recess;10, first tooth block;11, transmission gear;12, second locking block;13, second tooth block;14, second limit recess. Specific implementation

[0029] The technical scheme in the embodiments of the utility model will be apparently and completely described below with the drawings in the embodiments of the utility model, and obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative work belong to the range of the utility model protection.

[0030] Please refer to Figures 1-6 The utility model provides a kind of technical scheme: a connecting structure of piston rod and cross head body, including cross head body 1, piston rod body 2, locating bolt 3, limit card piece 4, installation cavity 5, extrusion card piece 6, first locking block 7, linkage sliding block 8, first limit recess 9, first tooth block 10, transmission gear 11, second locking block 12, second tooth block 13 and second limit recess 14, the upper end of cross head body 1 is provided with piston rod body 2, the lower surface of piston rod body 2 is fixedly connected with locating bolt 3, locating bolt 3 and cross head body 1 form threaded connection, limit card piece 4 is cylindrical design, and the opening of limit card piece 4 surface is cylindrical design, limit card piece 4 and locating bolt 3 form threaded connection, when using the device, first limit card piece 4 is placed in the recess of cross head body 1, then the locating bolt 3 of the lower end of piston rod body 2 is fixed with cross head body 1 and limit card piece 4 respectively with threaded connection.

[0031] The upper surface of the cross head body 1 is provided with a groove, and the inner wall of the cross head body 1 groove is provided with a limiting block 4, the surface of the limiting block 4 is provided with an opening, and the inner wall of the limiting block 4 opening is provided with an installation cavity 5, the lower surface of the piston rod body 2 is fixedly connected with an extrusion block 6, the extrusion block 6 is annularly designed, and the cross section of the extrusion block 6 is arc-shaped design, the side surface of the first locking block 7 penetrates the side surface of the limiting block 4, the first locking block 7 and the limiting block 4 are in sliding connection, and the first locking block 7 and the limiting block 4 are connected with a spring, the upper end of the linkage sliding block 8 penetrates the upper surface of the limiting block 4, and the side surface of the linkage sliding block 8 is inclined, the upper surface of the limiting block 4 has an annular groove, and the first limiting groove 9 is correspondingly arranged with the first locking block 7, the extrusion block 6 is inserted into the annular groove on the upper surface of the limiting block 4 by the cross head body 1, so that the extrusion block 6 extrudes the inclined surface of the linkage sliding block 8, which is convenient for the linkage sliding block 8 to drive the first locking block 7 to slide out of the installation cavity 5 to be clamped in the first limiting groove 9, so as to clamp and fix the limiting block 4 and the cross head body 1.

[0032] The upper end side surface of the installation cavity 5 is provided with the first locking block 7, the upper surface of the first locking block 7 is fixedly connected with the linkage sliding block 8, the inner wall of the cross head body 1 groove is provided with the first limiting groove 9, the lower surface of the first locking block 7 is fixedly connected with the first tooth block 10, the linkage locking mechanism comprises a transmission gear 11, which is arranged on the inner wall of the installation cavity 5, the inner wall of the installation cavity 5 is provided with a second locking block 12, the upper surface of the second locking block 12 is fixedly connected with a second tooth block 13, the outer surface of the positioning bolt 3 is provided with a second limiting groove 14, while the first locking block 7 moves, the first locking block 7 drives the transmission gear 11 to rotate through the first tooth block 10, which is convenient for the transmission gear 11 to drive the second tooth block 13 and the second locking block 12 to slide.

[0033] The linkage locking mechanism is arranged in the installation cavity 5, which drives the second locking block 12 and the second tooth block 13 to move to clamp the second limiting groove 14 through the first tooth block 10 and the transmission gear 11, the transmission gear 11 is in rotary connection with the installation cavity 5, the transmission gear 11 is in meshing connection with the first tooth block 10 and the second tooth block 13 respectively, the second locking block 12 penetrates the opening inner wall of the installation cavity 5, and the second locking block 12 is in sliding connection with the installation cavity 5, and the second locking block 12 and the installation cavity 5 are connected with a spring, the second limiting groove 14 is correspondingly arranged with the second locking block 12, the second locking block 12 slides out of the installation cavity 5, which is convenient for one end of the second locking block 12 to be clamped into the second limiting groove 14, so as to limit the positioning bolt 3, prevent the positioning bolt 3 from being deviated by vibration, ensure the stability of the positioning bolt 3, and increase the overall fastening between the cross head body 1, the piston rod body 2, the positioning bolt 3 and the limiting block 4.

[0034] Working principle: when using the connecting structure of the piston rod and the cross head body, the limiting block 4 and the cross head body 1 are threadedly fixed by the positioning bolt 3, the piston rod body 2 drives the extrusion block 6 to extrude the linkage sliding block 8, the linkage sliding block 8 drives the first locking block 7 to slide and engage the first limiting groove 9, the first tooth block 10 drives the transmission gear 11 to rotate, the transmission gear 11 drives the second locking block 12 and the second tooth block 13 to slide and engage the second limiting groove 14, and the practicability of the whole is increased.

[0035] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A connecting structure of a piston rod and a crosshead body, comprising a crosshead body (1) provided with a piston rod body (2) at its upper end, characterized in that: The lower surface of the piston rod body (2) is fixedly connected with a positioning bolt (3), the upper surface of the cross head body (1) is provided with a groove, and the inner wall of the groove of the cross head body (1) is provided with a limiting block (4), the surface of the limiting block (4) is provided with an opening, and the inner wall of the opening of the limiting block (4) is provided with an installation cavity (5), the lower surface of the piston rod body (2) is fixedly connected with an extrusion block (6), the upper end surface of the installation cavity (5) is provided with a first locking block (7), the upper surface of the first locking block (7) is fixedly connected with a linkage sliding block (8), the inner wall of the groove of the cross head body (1) is provided with a first limiting groove (9), the lower surface of the first locking block (7) is fixedly connected with a first tooth block (10), the inside of the installation cavity (5) is provided with a linkage locking mechanism, which drives the second locking block (12) and the second tooth block (13) to move through the first tooth block (10) and the transmission gear (11) and then engages the second limiting groove (14).

2. A connecting structure of a piston rod and a crosshead body according to claim 1, characterized in that: The positioning bolt (3) and the cross head body (1) constitute a threaded connection, the limiting block (4) is designed in a cylindrical shape, and the opening on the surface of the limiting block (4) is designed in a cylindrical shape, and the limiting block (4) and the positioning bolt (3) constitute a threaded connection.

3. A connecting structure of a piston rod and a crosshead body according to claim 1, characterized in that: The extrusion block (6) is designed in a ring shape, and the cross section of the extrusion block (6) is designed in an arc shape, and the side surface of the first locking block (7) penetrates the side surface of the limiting block (4).

4. A connecting structure of a piston rod and a cross head body according to claim 1, characterized in that: The first locking block (7) and the limiting block (4) constitute a sliding connection, and a spring is connected between the first locking block (7) and the limiting block (4), the upper end of the linkage sliding block (8) penetrates the upper surface of the limiting block (4), and the side surface of the linkage sliding block (8) is designed to be inclined, the upper surface of the limiting block (4) has a ring-shaped groove, and the first limiting groove (9) is provided correspondingly with the first locking block (7).

5. A connecting structure of a piston rod and a cross head body according to claim 1, characterized in that: The linkage locking mechanism comprises a transmission gear (11) which is arranged on the inner wall of the installation cavity (5), the second locking block (12) is arranged on the inner wall of the installation cavity (5), the upper surface of the second locking block (12) is fixedly connected with a second tooth block (13), and the outer surface of the positioning bolt (3) is provided with a second limiting groove (14).

6. A connecting structure of a piston rod and a crosshead body according to claim 5, characterized in that: The transmission gear (11) and the installation cavity (5) constitute a rotating connection, and the transmission gear (11) is respectively connected with the first tooth block (10) and the second tooth block (13) in a meshing connection.

7. A connecting structure of a piston rod and a cross head body according to claim 5, characterized in that: The second locking block (12) penetrates the opening inner wall of the installation cavity (5), and the second locking block (12) and the installation cavity (5) constitute a sliding connection, and a spring is connected between the second locking block (12) and the installation cavity (5), and the second limiting groove (14) is provided correspondingly with the second locking block (12).

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