Pin pulling tool for deep hole pin

Abstract

The pin pulling tool for the deep hole pin comprises a pin pulling rod, an embedded rod and an operating rod, a check block is fixedly installed at one end of the operating rod, the operating rod is installed at the tail end of the check block, the embedded rod is installed at the other end of the operating rod, a pulling head is installed at the tail end of the embedded rod, and the pulling head and a pin are installed in a matched mode through external threads. The pin pulling rod is sleeved with the sliding hammer in a sliding mode, the pulling head and the pin are tightly screwed and firmly connected through the operating mechanism, and the embedded rod can be embedded into the pin in a deep hole.

Description

Technical Field

[0001] The utility model relates to the field of cylindrical pin shaft disassembly, in particular to a pin pulling tool for deep hole pins. Background Art

[0002] The statements herein merely provide background art related to the present invention and do not necessarily constitute prior art.

[0003] During engine operation and maintenance, when disassembling the valve system parts, it is necessary to first remove the cylindrical pins in front of the valve system parts. Some internal threaded cylindrical pins are embedded to a depth of 100mm, which is very inconvenient for removing pin parts embedded in deep holes. Therefore, in order to remove the roller tappet parts, it is necessary to remove the cylinder head and take them out from the top.

[0004] The inventor discovered the following technical problems:

[0005] (1) Existing pin extraction tools cannot adapt to the larger insertion distance of deep hole embedded pins, because the internal thread cylindrical pin is embedded in the deep hole. Referring to the patent with authorization announcement number CN203973475U, the existing pin extraction tools cannot effectively extend into the bottom of the deep hole and connect with the cylindrical pin because the extraction head is too short, and thus the cylindrical pin cannot be removed.

[0006] (2) Referring to the patent with authorization announcement number CN203973475U, the pull head cooperates with the cylindrical pin thread through the end thread. The operator needs to twist the handle 32 at the end of the pull rod through the friction force of the hand, so that the pull head is screwed into the cylindrical pin thread. The pull head and the pin are tightened but not tightly connected. Utility Model Content

[0007] The utility model aims to provide a pin pulling tool for deep hole pins, which can at least solve one of the above technical problems.

[0008] To achieve the above-mentioned purpose, the utility model proposes a pin pulling tool for deep hole pins, including a pin pulling rod, an embedding rod and an operating rod, a block is fixedly installed on one end of the operating rod, the end of the block is installed with the operating rod, the other end of the operating rod is installed with an embedding rod, the end of the embedded rod is installed with a pulling head, the pulling head is installed in cooperation with the pin through an external thread, and the sliding hammer is slidably sleeved on the pin pulling rod.

[0009] It is further configured that the operating rod includes a connecting rod, and a handle 32 is vertically mounted on the connecting rod.

[0010] It is further configured that the operating rod is provided with a round hole, and the handle 32 can be movably mounted in the round hole.

[0011] It is further configured that the pulling head and the extension rod generally adopt an integrated structure.

[0012] It is further configured that the end of the embedded rod is connected to the pulling head through a threaded connection.

[0013] It is further configured that the cross-sectional diameter of the pin pulling rod is larger than the cross-sectional diameter of the embedding rod.

[0014] It is further configured that the sliding hammer slides along the pin pulling rod and hits the stopper to pull the internal thread pin out of the pin hole.

[0015] It is further configured that the operating rod is arranged on a side of the stopper facing away from the slide hammer.

[0016] It is further configured that the pin pulling rod is formed in one piece and the slide hammer is formed in one piece.

[0017] It is further configured that the center lines of the pin pulling rod, the slide hammer, the embedding rod and the pulling head are located on the same straight line.

[0018] Beneficial effects of one or more of the above technical solutions:

[0019] (1) The pin extraction tool can adapt to the larger insertion distance of the deep hole embedded pin. The length of the embedded rod can be set to 1 to 50 cm. The extraction head can effectively extend into the hole to effectively extract the pin embedded in the deep hole, reducing some unnecessary disassembly work.

[0020] (2) The pulling head and the pin are tightened and connected firmly through the operating mechanism. The operator holds the joystick with both hands and rotates the joystick. The rotational force is transmitted to the pulling head through the joystick. After the pulling head and the pin are tightened, they are firmly connected. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings in the specification, which constitute a part of the present application, are used to provide a 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 a limitation on the present application.

[0022] Figure 1 It is a structural schematic diagram of the utility model.

[0023] Figure 2 This is a schematic diagram of the pin installation of the utility model.

[0024] In the figure, 1 is a pin pulling rod; 2 is an embedding rod; 3 is an operating rod; 31 is a connecting rod; 32 is a handle 32; 4 is a stopper; 5 is a pulling head; 6 is a sliding hammer; and 7 is a pin. DETAILED DESCRIPTION

[0025] The specific implementation of this embodiment is described below in conjunction with the accompanying drawings.

[0026] Reference Figure 1A pin pulling tool for deep hole pins includes a pin pulling rod 1, an embedded rod 2 and an operating rod 3. A stopper 4 is fixedly installed at one end of the operating rod 3, and the operating rod 3 is installed at the end of the stopper 4. The other end of the operating rod 3 is installed with an embedded rod 2. A pulling head 5 is installed at the end of the embedded rod 2. The pulling head 5 is installed with a pin 7 through an external thread. A sliding hammer 6 is slidably sleeved on the pin pulling rod 1. The length of the pin pulling rod 1 can be set to 10 to 100 cm.

[0027] The operating rod 3 comprises a connecting rod 31, and a handle 32 is vertically mounted on the connecting rod 31. The handle 32 is held by both hands so that the pin puller can be operated by both hands during use, which is convenient to use.

[0028] The operating rod 3 is provided with a circular hole, and the handle 32 can be movably installed in the circular hole, wherein the handle 32 can be pulled out from the circular hole when not in use.

[0029] For the sake of structural stability and convenient design, the pulling head 5 and the embedded rod 2 generally adopt an integrated structure, which can be a welded structure.

[0030] The end of the embedded rod 2 is connected to the pull head 5 through a threaded connection. The end of the pull head 5 adopts an external thread structure to achieve connection with the pin. The thread specifications include but are not limited to the thread sizes specified in GB / T 196, and the nominal diameter is in the range of 1 to 25 mm.

[0031] The cross-sectional diameter of the pin pulling rod 1 is greater than the cross-sectional diameter of the embedding rod 2 .

[0032] The slide hammer 6 slides along the pin pulling rod 1 and hits the stopper 4 to pull the internal thread pin 7 out of the pin 7 hole.

[0033] The operating rod 3 is arranged on the side of the stopper 4 away from the slide hammer 6, wherein the setting of the stopper 4 includes but is not limited to a cylindrical structure, as long as it can effectively block the slide hammer 6 when the slide hammer 6 falls, thereby transmitting the pin pulling force.

[0034] For the sake of structural stability and convenient design, the pin pulling rod 1 and the slide hammer 6 are formed in one piece.

[0035] The center lines of the pin pulling rod 1, the slide hammer 6, the embedding rod 2 and the pulling head 5 are located on the same straight line, so the positioning pin can be removed more quickly.

[0036] Working principle:

[0037] Reference Figure 1 , 2When pulling out a pin, first connect the pin pulling rod 1, the sliding hammer 6, the embedded rod 2 and the pulling head 5 firmly, hold the joystick to extend the pin pulling tool into the deep hole, then hold the handle 32 and screw it in, and tighten the pulling head 5 and the pin through the operating mechanism to connect them firmly. First, pull the sliding hammer 6 to a high place and give appropriate thrust to make the sliding hammer 6 slide out at a certain speed and finally hit the end of the pin pulling rod 1. The impact force of the sliding hammer 6 will be converted into the pulling force of the pin, and the sliding hammer 6 will be pulled up and pushed out several times until the pin is pulled out.

[0038] Although the above describes the specific implementation methods of the utility model in combination with the accompanying drawings, it is not intended to limit the scope of protection 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 scope of protection of the utility model.

Claims

1. A deep hole pin extraction tool, characterized in that: It includes a pin pulling rod, an embedding rod and an operating rod, a block is fixedly installed on one end of the operating rod, the end of the block is installed with the operating rod, the other end of the operating rod is installed with the embedding rod, the end of the embedding rod is installed with a pulling head, the pulling head is installed with a pin through an external thread, and a sliding hammer is slidably sleeved on the pin pulling rod.

2. The deep hole pin pulling tool according to claim 1, characterized in that: The operating rod comprises a connecting rod, and a handle is vertically mounted on the connecting rod.

3. The deep hole pin pulling tool according to claim 2, characterized in that: The operating rod is provided with a round hole, and the handle can be movably installed in the round hole.

4. The deep hole pin pulling tool according to claim 1, characterized in that: The pulling head and the extension rod generally adopt an integrated structure.

5. The deep hole pin pulling tool according to claim 1, characterized in that: The end of the embedded rod is connected to the pulling head through threads.

6. The deep hole pin pulling tool according to claim 1, characterized in that: The cross-sectional diameter of the pin pulling rod is larger than the cross-sectional diameter of the embedding rod.

7. The deep hole pin pulling tool according to claim 1, characterized in that: The slide hammer slides along the pin pulling rod and hits the stopper to pull the internal thread pin out of the pin hole.

8. The deep hole pin pulling tool according to claim 1, characterized in that: The operating rod is arranged on a side of the stopper away from the slide hammer.

9. The deep hole pin pulling tool according to claim 1, characterized in that: The pin pulling rod is integrally formed and the slide hammer is integrally formed.

10. The deep hole pin pulling tool according to claim 1, characterized in that: The center lines of the pin pulling rod, the slide hammer, the embedding rod and the pulling head are located on the same straight line.

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