Threaded pin puller

Abstract

The utility model relates to a pin puller, in particular to a threaded pin puller to solve the technical problems that an existing pin puller is inconvenient to operate in a small space, and a positioning pin is not easy to pull out. The utility model provides a threaded pin puller which comprises an outer ejector sleeve, a stepped through hole is formed in the outer ejector sleeve along the central axis of the outer ejector sleeve, the small section of the stepped through hole is a threaded hole, and the large section of the stepped through hole is an unthreaded hole. A threaded ejector rod is mounted on the outer ejector sleeve through a small section of the stepped through hole; a first rotating head is arranged at the end, close to the small section of the stepped through hole, of the threaded ejector rod, a cylindrical pin connecting block is arranged at the end, away from the small section of the stepped through hole, of the threaded ejector rod, and the diameter of the pin connecting block is smaller than that of the threaded hole. A first threaded connecting rod with the same rotating direction as the threaded ejector rod is arranged at the end, away from the threaded ejector rod, of the pin connecting block and used for being connected with a pin. The use of the threaded pin puller is not limited by space, and the threaded pin puller can be suitable for the environment with limited pin pulling operation space.

Description

Technical Field

[0001] The utility model relates to a pin puller, in particular to a threaded pin puller. Background Art

[0002] In mechanical engineering, the installation and removal of high-precision components is a key link to ensure stable performance and reliable accuracy of equipment, especially in some precision machinery, aerospace, automobile manufacturing and other fields, the positioning accuracy of components is crucial to the overall performance. In order to ensure long-term reliable installation accuracy without changes, it is usually necessary to install a positioning pin in the positioning pin hole for positioning after installation is completed.

[0003] For example, a Chinese patent document with publication number CN208713865U discloses a multifunctional pin puller, including a pin puller body, a weight and a special connecting piece; the pin puller body is a rod structure, the weight is slidably mounted in the middle of the pin puller body, the special connecting piece is fixedly mounted on one end of the pin puller body, a V-shaped socket is laterally extended from the outer end of the special connecting piece, and a transverse waist-shaped groove is also provided in the middle of the special connecting piece, the transverse waist-shaped groove is located on the inner side of the V-shaped socket, the inner stop of the V-shaped socket is connected to the transverse waist-shaped groove, and when pulling the pin, the middle part of the pin pulling bolt is clamped on the inner stop of the V-shaped socket, and the head of the pin pulling bolt is located in the transverse waist-shaped groove. When pulling out the pin shaft, screw the bolt into the threaded hole of the pin shaft to be pulled out, and then use the V-shaped clamp of the special connecting piece to clamp the middle of the bolt. At this time, the bolt head is located in the horizontal waist-shaped groove. At the same time, use manual method to make the heavy hammer slide quickly along the pin puller body toward the pin pulling flange and hit the pin pulling flange. Under the impact force of the heavy hammer, the pin shaft to be pulled out can be smoothly pulled out from the machine tool.

[0004] The deficiencies in the above-mentioned prior art are as follows: the existing pin puller relies on the principle of inertial impact, that is, after the pin puller is connected to the locating pin, a heavy hammer is used to impact the pin puller body to quickly slide along the pin puller body and impact the pin puller flange. In a small operating space, its operating convenience is greatly limited, resulting in difficulty in pulling out the locating pin. Utility Model Content

[0005] The utility model aims to provide a threaded pin puller to solve the technical problems that the existing pin pullers usually work based on the principle of inertial impact, are inconvenient to operate in a small space, and the positioning pins are not easy to be pulled out, and to provide a threaded pin puller.

[0006] In order to solve the above technical problems, the technical solutions provided by the utility model are as follows:

[0007] A thread pin puller, which is special in that:

[0008] The outer top sleeve comprises an outer top sleeve, wherein a stepped through hole is opened along the central axis thereof, wherein a small section of the stepped through hole is a threaded hole, and a large section of the stepped through hole is a smooth hole;

[0009] The outer top sleeve is provided with a threaded top rod through a small section of the stepped through hole;

[0010] The end of the threaded push rod close to the stepped through hole section is provided with a first rotating head, and the end of the threaded push rod away from the stepped through hole section is provided with a cylindrical pin connection block, and the diameter of the pin connection block is smaller than the diameter of the threaded hole;

[0011] The end of the pin connection block away from the threaded push rod is provided with a first threaded connection rod with the same rotation direction as the threaded push rod, which is used for connecting with the pin.

[0012] Furthermore, a threaded connection hole is provided at one end of the pin connection block close to the threaded push rod;

[0013] A second threaded connecting rod is provided at one end of the threaded top rod close to the pin connecting block. The second threaded connecting rod is fixedly connected to the pin connecting block through a threaded connecting hole, and the second threaded connecting rod has the same rotation direction as the threaded top rod and the first threaded connecting rod.

[0014] Furthermore, a force-adding hole is provided on the first rotating head, and the axis of the force-adding hole is perpendicular to the axis of the threaded ejector rod;

[0015] The first rotating head is provided with a force adding rod through a force adding hole.

[0016] Further, the outer top sleeve includes a second rotating head, and a cylindrical section connected to the second rotating head;

[0017] The second rotating head is arranged close to the first rotating head, the threaded hole is arranged in the second rotating head and an end of the cylindrical section close to the second rotating head, and the light hole is arranged in an end of the cylindrical section away from the second rotating head.

[0018] Further, the first rotating head is any one of a tetragonal rotating head, a hexagonal rotating head or a regular polygonal rotating head.

[0019] Furthermore, the second rotating head is any one of a tetragonal rotating head, a hexagonal rotating head or a regular polygonal rotating head.

[0020] Compared with the prior art, the utility model has the following beneficial effects:

[0021] 1. The threaded pin puller provided by the utility model can be used to remove tapered pins and straight pins of different specifications by replacing the pin connection block; when working, a first threaded connection head adapted to the threaded hole of the locating pin is used to connect with the locating pin, a first rotating head at the end of the threaded push rod is fixed by a wrench, and the outer top sleeve is rotated. When the end of the outer top sleeve hits the end face of the workpiece, the locating pin can be pulled out by rotating the outer top sleeve; the use of the threaded pin puller is not limited by space, and can be applied to environments where the space for pin pulling operation is limited.

[0022] 2. The thread pin puller provided by the utility model has the advantages of simple structure, light weight, small size, wide application range, reliable use, low cost, etc., and can be widely used in various working occasions such as mechanical maintenance and after-sales service. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the three-dimensional structure of the embodiment of the utility model in use;

[0024] Figure 2 This is a schematic diagram of the internal structure of the outer top sleeve in the embodiment of the utility model;

[0025] Figure 3 This is a schematic diagram of the three-dimensional structure of the embodiment of the utility model after the force-adding rod is removed;

[0026] Figure 4 for Figure 3 A cross-sectional view along the radial direction;

[0027] Figure 5 It is a three-dimensional structural schematic diagram of the threaded push rod, the first rotating head and the first threaded connecting rod in the embodiment of the utility model;

[0028] Figure 6 It is a schematic diagram of the three-dimensional structure of the pin connection block in the embodiment of the utility model.

[0029] Explanation of the reference numerals: 1-external top sleeve, 11-second rotating head, 12-cylindrical section, 2-stepped through hole, 21-threaded hole, 22-bright hole, 3-threaded top rod, 4-first rotating head, 5-pin connecting block, 51-first threaded connecting rod, 52-threaded connecting hole, 6-second threaded connecting rod, 7-force hole, 8-force rod. DETAILED DESCRIPTION

[0030] The following will be combined with the accompanying drawings to clearly and completely describe the technical solutions in 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 of 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.

[0031] like Figure 1 and Figure 2 As shown, a thread pin puller comprises an outer top sleeve 1, wherein the outer top sleeve 1 is provided with a stepped through hole 2 along its central axis, wherein a small section of the stepped through hole 2 is a threaded hole 21, and a large section of the stepped through hole 2 is a light hole 22;

[0032] The outer top sleeve 1 is provided with a threaded push rod 3 through a small section of the stepped through hole 2; the threaded push rod 3 and the outer top sleeve 1 are threadedly connected;

[0033] like Figure 3 , Figure 4 and Figure 5 As shown, in order to facilitate the rotation of the threaded push rod 3, a first rotating head 4 is provided at one end of the threaded push rod 3 close to the small section of the stepped through hole 2, and the threaded push rod 3 can be rotated manually or with a wrench. In order to facilitate the connection between the threaded push rod 3 and the positioning pin, a cylindrical pin connection block 5 is provided at one end of the threaded push rod 3 away from the small section of the stepped through hole 2, and the diameter of the pin connection block 5 is smaller than the diameter of the threaded hole 21; a first threaded connection rod 51 with the same rotation direction as the threaded push rod 3 is provided at one end of the pin connection block 5 away from the threaded push rod 3, which is used to connect with the pin.

[0034] like Figure 4 and Figure 6 As shown, in order to enable the threaded pin puller to be used to pull out different positioning pins, the pin connection block 5 and the threaded push rod 3 are connected by a threaded connection, which is convenient for replacing the pin connection block 5; the specific threaded connection method is:

[0035] A threaded connection hole 52 is formed at one end of the pin connection block 5 close to the threaded push rod 3;

[0036] A second threaded connecting rod 6 is provided at one end of the threaded top rod 3 close to the pin connecting block 5 . The second threaded connecting rod 6 is fixedly connected to the pin connecting block 5 through a threaded connecting hole 52 .

[0037] In order to ensure that the pin connecting block 5 can rotate in the same direction as the threaded top rod 3 when the threaded top rod 3 is rotated, the second threaded connecting rod 6 has the same rotation direction as the threaded top rod 3 and the first threaded connecting rod 51, so that when the force rod 8 is rotated, the threaded top rod 3 can drive the first threaded connecting rod 51 at the end of the pin connecting block 5 to connect with the threaded hole of the locating pin.

[0038] like Figure 3 and Figure 5 As shown, in order to facilitate the rotation of the first rotating head 4 and to fix the first rotating head 4 when the outer top sleeve 1 is rotated, a force hole 7 is provided on the first rotating head 4, and the axis of the force hole 7 is perpendicular to the axis of the threaded top rod 3; Figure 1 As shown, the first rotating head 4 is provided with a force rod 8 through a force hole 7 .

[0039] like Figure 1 and Figure 2As shown, in order to facilitate rotating the outer top sleeve 1 to pull out the positioning pin, the structure of the outer top sleeve 1 is arranged, and the outer top sleeve 1 includes a second rotating head 11 and a cylindrical section 12 connected to the second rotating head 11; the second rotating head 11 is arranged close to the first rotating head 4, the threaded hole 21 is arranged in the second rotating head 11 and the end of the cylindrical section 12 close to the second rotating head 11, and the light hole 22 is arranged in the end of the cylindrical section 12 away from the second rotating head 11. The second rotating head 11 can be rotated using an open-end wrench.

[0040] In this embodiment, the first rotary head 4 and the second rotary head 11 are both hexagonal rotary heads.

[0041] The working principle of the thread pin puller of the utility model is:

[0042] First, according to the diameter of the threaded hole on the positioning pin, a pin connection block 5 that matches the threaded hole of the positioning pin is selected;

[0043] Secondly, the pin connection block 5 is connected to the second threaded connection rod 6 of the threaded top rod 3 through the threaded connection hole 52;

[0044] Then, the force rod 8 is rotated to make the first rotating head 4 drive the threaded push rod 3 to rotate. When the threaded push rod 3 rotates, the pin connection block 5 is driven to rotate. The pin connection block 5 is connected to the threaded hole of the pin through the first threaded connecting rod 51.

[0045] Next, the outer top sleeve 1 is rotated so that the outer top sleeve 1 is close to the end surface of the workpiece and fits the workpiece;

[0046] Finally, hold the force rod 8 tightly, use the open-end wrench to cooperate with the second rotating head 11, and use the wrench to rotate the outer top sleeve 1 until the positioning pin is pulled out of the workpiece, thereby completing the pin pulling.

[0047] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or replacements within the technical scope disclosed in the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A thread pin puller, characterized in that: The outer top sleeve (1) comprises a stepped through hole (2) formed along the central axis of the outer top sleeve (1), the small section of the stepped through hole (2) being a threaded hole (21), and the large section of the stepped through hole (2) being a smooth hole (22); The outer top sleeve (1) is provided with a threaded top rod (3) through a small section of the stepped through hole (2); A first rotating head (4) is provided at one end of the threaded push rod (3) close to the small section of the stepped through hole (2), and a cylindrical pin connection block (5) is provided at one end of the threaded push rod (3) away from the small section of the stepped through hole (2), and the diameter of the pin connection block (5) is smaller than the diameter of the threaded hole (21); The end of the pin connection block (5) away from the threaded top rod (3) is provided with a first threaded connection rod (51) having the same rotation direction as the threaded top rod (3) and is used for connection with the pin.

2. The thread puller according to claim 1, characterized in that: A threaded connection hole (52) is formed at one end of the pin connection block (5) close to the threaded push rod (3); A second threaded connecting rod (6) is provided at one end of the threaded top rod (3) close to the pin connecting block (5); the second threaded connecting rod (6) is fixedly connected to the pin connecting block (5) via a threaded connecting hole (52); and the second threaded connecting rod (6) has the same rotation direction as the threaded top rod (3) and the first threaded connecting rod (51).

3. The thread puller according to claim 1 or 2, characterized in that: The first rotating head (4) is provided with a force hole (7), and the axis of the force hole (7) is perpendicular to the axis of the threaded push rod (3); The first rotating head (4) is provided with a force-adding rod (8) via a force-adding hole (7).

4. The thread puller according to claim 1, characterized in that: The outer top sleeve (1) comprises a second rotating head (11) and a cylindrical section (12) connected to the second rotating head (11); The second rotating head (11) is arranged close to the first rotating head (4), the threaded hole (21) is arranged in the second rotating head (11) and in one end of the cylindrical section (12) close to the second rotating head (11), and the light hole (22) is arranged in one end of the cylindrical section (12) away from the second rotating head (11).

5. The thread puller according to claim 1, characterized in that: The first rotating head (4) is any one of a tetragonal rotating head, a hexagonal rotating head or a regular polygonal rotating head.

6. The thread puller according to claim 4, characterized in that: The second rotating head (11) is any one of a tetragonal rotating head, a hexagonal rotating head or a regular polygonal rotating head.

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