Diesel engine valve key mounting tool

Abstract

A diesel engine valve cotter installation tool comprises a cross beam, the two ends of the cross beam are fixed to a base through supporting frames, a positioning base is arranged in the middle of the cross beam, the upper portion of the positioning base extends forwards to form an installation platform, and a guide sleeve is vertically installed on the upper portion of the positioning base. A limiting mechanism is installed on the rear side wall of the guide sleeve, a locking block in the limiting mechanism penetrates through the guide sleeve and then is embedded into a tooth groove of the gear, and the lower portion of the guide rod extends out of the guide sleeve and is provided with a pressing block. According to the device, the cam structure is adopted to drive the guide rod to press downwards, the gear and the limiting mechanism are matched to limit rotation of the cam, the valve spring is pressed downwards to the designated position through the pressing block, assembling and disassembling of the valve lock piece are completed, the structure is simple, operation is convenient and fast, operation can be completed only by one person, and the assembling efficiency is improved.

Description

Technical Field

[0001] The utility model relates to a diesel engine valve lock piece installation tool. Background Art

[0002] The valve group is an indispensable part of the engine valve mechanism. It is usually composed of valves, valve seat rings, valve springs, valve spring seats, valve lock plates, etc., and its function is to control the intake and exhaust of the engine cylinder. The valve lock plate is a part that enables the valve and the spring seat to achieve one-way connection and lock. Its function is to lock the valve. The installation accuracy of the parts is high, and the parts are relatively small, so assembly and disassembly are difficult. In the prior art, the disassembly and installation of the valve lock plate are generally performed manually. One operator compresses the valve spring, and the other operator cooperates to complete the installation or disassembly of the valve lock plate, and the assembly efficiency is low. Utility Model Content

[0003] In view of the shortcomings existing in the above problems, the utility model provides a diesel engine valve lock piece installation tool.

[0004] To achieve the above-mentioned purpose, the utility model provides a diesel engine valve lock plate installation tool, including a crossbeam, both ends of the crossbeam are fixed to a base through a support frame, a positioning seat is provided in the middle of the crossbeam, the upper part of the positioning seat extends forward to form a mounting platform and a guide sleeve is vertically installed, a guide rod is slidably arranged in the guide sleeve, a rotating shaft is radially installed on the upper part of the guide sleeve, a cam and a gear are fixedly installed in the middle part of the rotating shaft, the cam surface abuts against the upper part of the guide rod, a limiting mechanism is installed on the rear side wall of the guide sleeve, the locking block in the limiting mechanism passes through the guide sleeve and is embedded in the tooth groove of the gear, and the lower part of the guide rod extends out of the guide sleeve and is installed with a pressure block.

[0005] As a further improvement of the utility model, the limiting mechanism includes a positioning sleeve fixed to the rear side of the guide sleeve, the positioning sleeve slides toward one end of the gear to install the locking block, the other end of the positioning sleeve is threadedly installed with a limiting screw, and a compression spring I is provided between the locking block and the limiting screw.

[0006] As a further improvement of the utility model, the pressing block includes a pressing ring, and the upper part of the pressing ring is connected and fixed to the guide rod through a U-shaped bracket.

[0007] As a further improvement of the present invention, the lower portion of the guide sleeve passes through the mounting platform and is locked and positioned by a locking nut, and the lower portion of the guide sleeve is correspondingly processed with an external thread.

[0008] As a further improvement of the utility model, a communicating accommodating cavity and a guide groove are formed in the guide sleeve from top to bottom, a step portion is formed at the connection between the accommodating cavity and the guide groove, the cam and the gear are both placed in the accommodating cavity, the guide rod is slidably arranged in the guide groove, the upper part of the guide rod extends into the accommodating cavity and is provided with a spherical expansion head, the cam abuts against the spherical expansion head, and the upper part of the guide rod is sleeved with a compression spring, and the compression spring is placed between the spherical expansion head and the step portion.

[0009] As a further improvement of the present invention, the cross-section of the guide rod is hexagonal.

[0010] As a further improvement of the utility model, a front opening is processed on the front side of the guide sleeve for avoiding the cam.

[0011] As a further improvement of the present invention, a handle is radially mounted on one end of the rotating shaft.

[0012] The beneficial effects of the utility model are:

[0013] The device uses a cam structure to drive the guide rod to press down. The gear and the limit mechanism cooperate to limit the rotation of the cam. The pressure block presses the valve spring to the specified position to complete the assembly and disassembly of the valve lock plate. The downward pressure height is controllable, the structure is simple, and the operation is convenient. Only one person is needed to complete the operation, which improves the assembly efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a front view of a diesel engine valve lock piece installation tool according to the utility model;

[0015] Figure 2 It is a side sectional view of a diesel engine valve lock piece installation tool of the utility model;

[0016] Figure 3 for Figure 2 Middle AA section view;

[0017] Figure 4 This is a top view of a diesel engine valve lock piece installation tool according to the utility model;

[0018] Figure 5 Schematic diagram of the structure of the limiting mechanism 14.

[0019] In the figure: 1. base; 2. support frame; 3. crossbeam; 4. positioning seat; 41. mounting platform; 5. guide sleeve; 51. accommodating chamber; 52. step portion; 53. guide groove; 54. front opening; 6. locking nut; 7. compression spring; 8. guide rod; 81. spherical expansion head; 9. rotating shaft; 10. gear; 11. cam; 12. handle; 13. pressure block; 131. pressure ring; 132. U-shaped bracket; 14. limiting mechanism; 141. positioning sleeve; 142. locking block; 143. compression spring I; 144. limiting screw. DETAILED DESCRIPTION

[0020] like Figure 1 , Figure 2 As shown, a diesel engine valve lock piece installation tool described in an embodiment of the utility model comprises a cross beam 3, both ends of the cross beam 3 are fixed on a base 1 through a support frame 2, a positioning seat 4 is provided in the middle of the cross beam 3, the upper part of the positioning seat 4 extends forward to form a mounting platform 41 and a guide sleeve 5 is vertically installed, the lower part of the guide sleeve 5 passes through the mounting platform 41 and is locked and positioned by a locking nut 6, the lower part of the guide sleeve 5 is correspondingly processed with an external thread, a guide rod 8 is slidably arranged in the guide sleeve 5, a rotating shaft 9 is radially installed on the upper part of the guide sleeve 5, a cam 11 and a gear 10 are fixedly installed in the middle of the rotating shaft 9, and a handle 12 is radially installed at one end of the rotating shaft 9 (see Figure 4 ), the front side of the guide sleeve 5 is processed with a front opening 54 for avoiding the cam 11, the surface of the cam 11 abuts against the upper part of the guide rod 8, and the guide sleeve 5 is formed with a communicating accommodation cavity 51 and a guide groove 53 from top to bottom. A step portion 52 is formed at the connection between the accommodation cavity 51 and the guide groove 53. The cam 11 and the gear 10 are both placed in the accommodation cavity 51, and the guide rod 8 is slidably arranged in the guide groove 53. The cross-sectional shape of the guide rod 8 is hexagonal (see Figure 3 ), the upper part of the guide rod 8 extends into the accommodating cavity 51 and is provided with a spherical expansion head 81, the cam 11 abuts against the spherical expansion head 81, the upper part of the guide rod 8 is sleeved with a compression spring 7, the compression spring 7 is placed between the spherical expansion head 81 and the step portion 52, a limiting mechanism 14 is installed on the rear side wall of the guide sleeve 5, the locking block 142 in the limiting mechanism 14 passes through the guide sleeve 5 and is embedded in the tooth groove of the gear 10, the limiting mechanism 14 includes a positioning sleeve 141 fixed to the rear side of the guide sleeve 5, the positioning sleeve 141 slides toward one end of the gear 10 to install the locking block 142, the other end of the positioning sleeve 141 is threadedly installed with a limiting screw 144, and a compression spring Ⅰ143 is provided between the locking block 142 and the limiting screw 144 (see Figure 5 ), the lower part of the guide rod 8 extends out of the guide sleeve 5 and is installed with a pressure block 13, the pressure block 13 includes a pressure ring 131, and the upper part of the pressure ring 131 is connected and fixed to the guide rod 8 through a U-shaped bracket 132.

[0021] The device uses a cam structure to drive the guide rod to press down. The gear and the limit mechanism cooperate to limit the rotation of the cam. The pressure block presses the valve spring to the specified position to complete the assembly and disassembly of the valve lock plate. The downward pressure height is controllable, the structure is simple, and the operation is convenient. Only one person is needed to complete the operation, which improves the assembly efficiency.

[0022] In order to facilitate the understanding of the present invention, the following description is given in conjunction with the accompanying drawings during specific use;

[0023] When working, place the cylinder head on the base, and the valve stem is vertically located directly below the pressure ring. In the initial position, the low position of the cam abuts against the spherical expansion head of the guide rod. Press the handle downward, and the handle drives the shaft to rotate. The cam and gear on the shaft rotate synchronously, and the cam surface always abuts against the spherical expansion head of the guide rod. As the contact part between the cam and the spherical expansion head transitions from a low position to a high position, the cam exerts a downward pressure on the spherical expansion head. After being stressed, the guide rod moves downward along the guide groove, and the compression spring on the upper part of the guide rod undergoes elastic contraction. The pressure ring of the pressure block at the lower part of the guide rod is pressed against the edge of the valve spring and presses the valve spring down to the specified position. During this process, the gear rotates synchronously with the cam, and the limit The locking block in the positioning mechanism is continuously embedded in the tooth groove of the gear and slides out. After it is in place, the handle is released. The locking block relies on the elastic memory of the compression spring I, and the end of the locking block is embedded in the corresponding tooth groove on the gear to limit the gear from continuing to rotate. The valve spring is pressed and positioned by the pressure ring, and the valve lock plate can be disassembled and assembled along the openings on both sides of the U-shaped bracket on the upper part of the pressure ring; after the operation is completed, the handle is lifted to drive the cam to rotate to a low position to contact the spherical expansion head, and the locking block is embedded in the tooth groove of the gear to limit radial rotation, and the guide rod is reset by the elastic memory of the compression spring, and the cylinder head can be taken out; in the above structure, the radial rotation is limited by the locking block in conjunction with the gear, the rotation angle of the cam is controllable, and thus the downward movement distance of the guide rod is controllable, and the versatility is better.

[0024] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. 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. A diesel engine valve lock plate installation tool, characterized in that: The invention comprises a cross beam (3), the two ends of which are fixed on a base (1) through a support frame (2), a positioning seat (4) is provided in the middle of the cross beam (3), the upper part of the positioning seat (4) extends forward to form a mounting platform (41) and a guide sleeve (5) is vertically mounted thereon, a guide rod (8) is slidably arranged in the guide sleeve (5), a rotating shaft (9) is radially mounted on the upper part of the guide sleeve (5), a cam (11) and a gear (10) are fixedly mounted in the middle part of the rotating shaft (9), the surface of the cam (11) abuts against the upper part of the guide rod (8), a limiting mechanism (14) is installed on the rear side wall of the guide sleeve (5), a locking block (142) in the limiting mechanism (14) passes through the guide sleeve (5) and is embedded in the tooth groove of the gear (10), and the lower part of the guide rod (8) extends out of the guide sleeve (5) and is mounted with a pressing block (13).

2. A diesel engine valve lock plate installation tool according to claim 1, characterized in that: The limiting mechanism (14) includes a positioning sleeve (141) fixed to the rear side of the guide sleeve (5), the positioning sleeve (141) is slidably installed toward one end of the gear (10) to install the locking block (142), the other end of the positioning sleeve (141) is threadedly installed with a limiting screw (144), and a compression spring I (143) is provided between the locking block (142) and the limiting screw (144).

3. A diesel engine valve lock plate installation tool according to claim 1, characterized in that: The pressing block (13) comprises a pressing ring (131), and the upper part of the pressing ring (131) is connected and fixed to the guide rod (8) via a U-shaped bracket (132).

4. A diesel engine valve lock plate installation tool according to claim 1, characterized in that: The lower part of the guide sleeve (5) passes through the mounting platform (41) and is locked in place by a locking nut (6), and the lower part of the guide sleeve (5) is correspondingly processed with an external thread.

5. A diesel engine valve lock plate installation tool according to claim 1, characterized in that: The guide sleeve (5) is formed with a communicating accommodation cavity (51) and a guide groove (53) from top to bottom. A step portion (52) is formed at the connection between the accommodation cavity (51) and the guide groove (53). The cam (11) and the gear (10) are both placed in the accommodation cavity (51). The guide rod (8) is slidably arranged in the guide groove (53). The upper part of the guide rod (8) extends into the accommodation cavity (51) and is provided with a spherical expansion head (81). The cam (11) abuts against the spherical expansion head (81). The upper part of the guide rod (8) is sleeved with a compression spring (7). The compression spring (7) is arranged between the spherical expansion head (81) and the step portion (52).

6. A diesel engine valve lock plate installation tool according to claim 1, characterized in that: The cross-sectional shape of the guide rod (8) is hexagonal.

7. A diesel engine valve lock plate installation tool according to claim 1, characterized in that: The front side of the guide sleeve (5) is processed with a front opening (54) for avoiding the cam (11).

8. A diesel engine valve lock plate installation tool according to claim 1, characterized in that: A handle (12) is radially mounted on one end of the rotating shaft (9).

Images