Anti-loose eccentric hammer with pin pulling function

Abstract

The utility model discloses a kind of anti-loose eccentric hammer with pin pulling function, comprising: double screw nut, eccentric hammer head, concave wedge block nut, flat end wedge block nut and hammer handle, the front end of the hammer handle is equipped with second external thread, the rear end of hammer handle is equipped with handle, the middle part of eccentric hammer head is equipped with the hammer hole of through, double screw nut, eccentric hammer head, concave wedge block nut and flat end wedge block nut are sequentially worn in the front end of hammer handle, double screw nut is screwed and fixed on second external thread, for limiting the displacement of eccentric hammer head front end on hammer handle, concave wedge block nut and flat end wedge block nut are screwed and fixed on second external thread, for limiting the displacement of eccentric hammer head rear end on hammer handle. The utility model has the characteristics of compact structure, convenient to use, high safety and high reliability, which reduces the space occupied by the storage tool, and is easy to carry and not easy to lose.

Description

Technical Field

[0001] This utility model relates to the field of machining technology, specifically to an anti-loosening eccentric hammer with a pin-pulling function. Background Technology

[0002] In the fields of machining, assembly, and maintenance, hammers and pin pullers are widely used and indispensable tools. These two tools have different structures and functions. Hammers are often used to strike objects, causing them to move or deform, while pin pullers are mainly used to disassemble parts connected by cylindrical pins, tapered pins, or cotter pins. Because these two tools are indispensable, every section, workshop, or factory must have them, which not only occupies too much of the tool platform but also, due to the large number of components, leads to loosening or loss during daily use. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a non-loosening eccentric hammer with a pin-pulling function that is compact in structure, easy to use and has multiple functions, in order to overcome the shortcomings of the existing technology.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: An anti-loosening eccentric hammer with a pin-pulling function includes: a double-wish nut, an eccentric hammer head, a concave wedge nut, a flat-end wedge nut, and a hammer handle. The front end of the hammer handle is provided with a second external thread, and the rear end of the hammer handle is provided with a handle. The eccentric hammer head is provided with a through hammer hole in the middle. The double-wish nut, eccentric hammer head, concave wedge nut, and flat-end wedge nut are sequentially inserted through the front end of the hammer handle. The double-wish nut is screwed and fixed on the second external thread to limit the displacement of the front end of the eccentric hammer head on the hammer handle. The concave wedge nut and flat-end wedge nut are both screwed and fixed on the second external thread to limit the displacement of the rear end of the eccentric hammer head on the hammer handle.

[0005] As a further improvement of this utility model, it also includes a conversion connector. The eccentric hammer head, the flat-end wedge nut, and the concave wedge nut are sequentially passed through the hammer handle. The flat-end wedge nut and the concave wedge nut are both screwed and fixed on the second external thread to limit the displacement of the front end of the eccentric hammer head on the hammer handle. The handle is used to limit the displacement of the rear end of the eccentric hammer head on the hammer handle, so as to realize that the eccentric hammer head is sleeved on the hammer handle to slide axially along the hammer handle and stop at the handle. The conversion connector passes through one end of the double-turn nut, and the other end of the double-turn nut is screwed and fixed on the second external thread. The end of the hammer handle is pressed against the conversion connector. The conversion connector is used to connect the threaded pin to be removed.

[0006] As a further improvement of this utility model, the outer wall of the double-rotor nut is provided with a first external thread, which is used to connect the eccentric hammer head; the upper part of the inner through hole of the double-rotor nut is provided with a first internal thread, which matches the second external thread; the lower part of the inner through hole of the double-rotor nut is provided with a T-shaped light hole, which is used to limit the position of the conversion connector.

[0007] As a further improvement of this utility model, the first external thread and the first internal thread are screwed in opposite directions.

[0008] As a further improvement of this utility model, the front end of the hammer hole is provided with a second internal thread, which matches the first external thread to realize the connection and fixation of the double-turn nut and the eccentric hammer head; the rear end of the hammer hole is provided with a concave surface, which matches the front end of the concave wedge nut to realize the concave wedge nut pressing against the eccentric hammer head.

[0009] As a further improvement of this utility model, the front end of the concave wedge nut is provided with a boss, which matches the concave surface; the rear end of the concave wedge nut is provided with a concave conical surface, which matches the front end of the flat-end wedge nut; the inner hole of the concave wedge nut is provided with a third internal thread, which matches the second external thread.

[0010] As a further improvement of this utility model, the front end of the flat-end wedge nut is provided with a convex conical surface, which matches the concave conical surface. The rear end of the flat-end wedge nut is a flat surface. The inner hole of the flat-end wedge nut is provided with a fourth internal thread, which matches the second external thread.

[0011] As a further improvement of this utility model, the eccentric hammerhead is an octagonal hammer, and the striking surface of the eccentric hammerhead is an inclined plane.

[0012] As a further improvement of this utility model, the handle is provided with knurling.

[0013] As a further improvement of this utility model, the double-spin nut, concave wedge nut, flat-end wedge nut and adapter are all made of T10 carbon tool steel and are hardened; the eccentric hammer head is made of 45# carbon steel; and the hammer handle is made of T10 carbon tool steel.

[0014] Compared with the prior art, the advantages of this utility model are: 1. The anti-loosening eccentric hammer with pin-pulling function of this utility model is achieved by setting a second external thread at the front end of the hammer handle and a handle at the rear end, and sequentially inserting a double-wish nut, an eccentric hammer head, a concave wedge nut, and a flat-end wedge nut at the front end of the hammer handle. The rear end of the eccentric hammer head is limited by the cooperation between the concave wedge nut, the flat-end wedge nut and the second external thread, and the front end of the eccentric hammer head is limited by the cooperation between the double-wish nut and the second external thread. Thus, the eccentric hammer head is firmly fixed to the front end of the hammer handle. It can be used as a conventional eccentric hammer. It has a compact structure and is easy to assemble and disassemble.

[0015] 2. This utility model of an anti-loosening eccentric hammer with pin-pulling function adds an adapter that is not connected to the threaded pin to be pulled out. The adapter is inserted through one end of a double-wish nut, and the eccentric hammer head is inserted through the hammer handle. The concave wedge nut and the flat-end wedge nut are then screwed and fixed to the hammer handle. Through the cooperation of the handle with the concave wedge nut and the flat-end wedge nut, the eccentric hammer head is sleeved on the hammer handle and slides axially along the hammer handle and stops at the handle. The other end of the double-wish nut is screwed and fixed to the second external thread, and the end of the hammer handle is pressed against the adapter. When the eccentric hammer head stops sliding due to the obstruction of the handle, its power is transmitted to the hammer handle, and the resulting impact force pulls out the connected threaded pin. This utility model of an anti-loosening eccentric hammer can be used as a hammer or a pin puller. It contains fewer types of parts, and the assembly between the parts is simple and convenient. It reduces the space occupied by the storage tools and achieves the goal of cost reduction and efficiency improvement. Attached Figure Description

[0016] Figure 1 This is one of the schematic diagrams illustrating the explosive structure principle of the anti-loosening eccentric hammer with pin-pulling function in a specific embodiment of this utility model; Figure 2 This is one of the three-dimensional structural schematic diagrams of the anti-loosening eccentric hammer with pin-pulling function in a specific embodiment of this utility model; Figure 3 This is a schematic diagram of the structural principle of the double-rotor nut in a specific embodiment of the present utility model; wherein, Figure (a) is a perspective view, Figure (b) is a sectional view, and Figure (c) is a front sectional view; Figure 4 Figure (a) is a front perspective view and Figure (b) is a back perspective view. Figure 5 This is a schematic diagram illustrating the structural principle of the concave wedge nut in a specific embodiment of this utility model; Figure 6 This is a schematic diagram illustrating the structural principle of the flat-end wedge nut in a specific embodiment of this utility model; Figure 7This is a schematic diagram of the structural principle of the hammer handle in a specific embodiment of this utility model; Figure 8 This is a schematic diagram of the torsion of the eccentric hammer head when striking an object in a specific embodiment of this utility model; Figure 9 This is the second schematic diagram of the explosion structure principle of the anti-loosening eccentric hammer with pin-pulling function in a specific embodiment of this utility model; Figure 10 This is the second schematic diagram of the three-dimensional structure of the anti-loosening eccentric hammer with pin-pulling function in a specific embodiment of this utility model. Figure 11 This is a schematic diagram illustrating the structural principle of the threaded pin in a specific embodiment of this utility model; Figure 12 This is a schematic diagram illustrating the structural principle of the anti-loosening eccentric hammer as a pin puller in a specific embodiment of this utility model; Legend: 1. Double-handled nut; 2. Eccentric hammer head; 3. Concave wedge nut; 4. Flat-end wedge nut; 5. Hammer handle; 6. Adaptor joint; 7. Threaded pin; 11. First external thread; 12. First internal thread; 13. T-shaped clear hole; 21. Hammer hole; 22. Second internal thread; 23. Concave surface; 31. Third internal thread; 32. Concave conical surface; 33. Boss; 41. Fourth internal thread; 42. Convex conical surface; 51. Second external thread; 52. Handle; 71. Threaded blind hole. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings and specific preferred embodiments, but this does not limit the scope of protection of the present invention.

[0018] In the description of this utility model, it should be understood that the terms "side", "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0019] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "multiple" means two or more, unless otherwise explicitly specified.

[0020] Example 1 like Figure 1 and Figure 2 As shown, the anti-loosening eccentric hammer with pin-pulling function of this utility model includes: a double-rotor nut 1, an eccentric hammer head 2, a concave wedge nut 3, a flat-end wedge nut 4, and a hammer handle 5. Figure 7 As shown, the front end of the hammer handle 5 is a shank with a second external thread 51, and the rear end of the hammer handle 5 is provided with a handle 52, which is knurled to increase friction and achieve anti-slip. The eccentric hammer head 2 is an octagonal hammer, and the striking surface of the eccentric hammer head 2 is an inclined plane. A through hammer hole 21 is provided in the middle of the eccentric hammer head 2. The double-turn nut 1, the eccentric hammer head 2, the concave wedge nut 3, and the flat-end wedge nut 4 are sequentially passed through the front end of the hammer handle 5. The double-turn nut 1 is screwed and fixed on the second external thread 51 to limit the displacement of the front end of the eccentric hammer head 2 on the hammer handle 5. The concave wedge nut 3 and the flat-end wedge nut 4 are both screwed and fixed on the second external thread 51 to limit the displacement of the rear end of the eccentric hammer head 2 on the hammer handle 5. The combined use of the concave wedge nut 3 and the flat-end wedge nut 4 can also play a role in preventing loosening during vibration.

[0021] In this embodiment, the double-rotor nut 1, the concave wedge nut 3, the flat-end wedge nut 4, and the adapter 6 are all made of T10 carbon tool steel and are hardened; the eccentric hammer head 2 is made of 45# carbon steel; and the hammer handle 5 is made of T10 carbon tool steel; it has the characteristics of high structural strength and long service life.

[0022] like Figure 3 As shown, the outer wall of the double-wish nut 1 is provided with a first external thread 11, which is used to connect the eccentric hammer head 2. The upper part of the inner through hole of the double-wish nut 1 is provided with a first internal thread 12, which matches the second external thread 51. The first external thread 11 and the first internal thread 12 are screwed in opposite directions to enable the double-wish nut 1 to be connected to different components at the same time.

[0023] like Figure 4 As shown, the front end of the hammer hole 21 is provided with a second internal thread 22, which matches the first external thread 11 to achieve the connection and fixation between the double-turn nut 1 and the eccentric hammer head 2. The rear end of the hammer hole 21 is provided with a concave surface 23, which matches the front end of the concave wedge nut 3 to achieve the concave wedge nut 3 pressing against the eccentric hammer head 2 and limiting the eccentric hammer head 2.

[0024] like Figure 5 As shown, the front end of the concave wedge nut 3 is provided with a boss 33, which matches the concave surface 23; the rear end of the concave wedge nut 3 is provided with a concave conical surface 32, which matches the front end of the flat wedge nut 4; the inner hole of the concave wedge nut 3 is provided with a third internal thread 31, which matches the second external thread 51.

[0025] like Figure 6 As shown, the front end of the flat-end wedge nut 4 is provided with a convex conical surface 42, which matches the concave conical surface 32. The rear end of the flat-end wedge nut 4 is a flat surface. The inner hole of the flat-end wedge nut 4 is provided with a fourth internal thread 41, which matches the second external thread 51.

[0026] In this embodiment, when the eccentric hammer is used as a conventional hammer, the assembly sequence of the various components is as follows: Step 1: Screw the first external thread 11 of the double-wish nut 1 into the second internal thread 22 of the eccentric hammer head 2 and tighten it. In this embodiment, the first internal thread 12 of the double-wish nut 1 is a right-hand thread and the first external thread 11 is a left-hand thread.

[0027] Step 2: Tighten the flat-end wedge nut 4 and the concave wedge nut 3 onto the root of the second external thread 51 of the hammer handle 5 in sequence.

[0028] Step 3: Twist the components formed in Step 2 and Step 1 together and tighten them. The second external thread 51 of the hammer handle 5 is screwed into the first internal thread 12 of the double-turn nut 1.

[0029] Step 4: Tighten the concave wedge nut 3 to make the boss 33 and the concave surface 23 press against each other.

[0030] Step 5: Tighten the flat-end wedge nut 4 to press the convex conical surface 42 against the concave conical surface 32, thus achieving a mechanical anti-loosening effect. At this point, the eccentric hammer assembly is complete. Figure 2 As shown.

[0031] When using an eccentric hammer to strike an object, such as Figure 8As shown, the eccentric hammer head 2 impacts and generates a counterclockwise torque, the direction of which is the same as the thread direction of the double-wish nut 1 and the hammer handle 5, further tightening the three components. This structural design of the eccentric hammer head 2 achieves an automatic tightening effect during hammering operations. The eccentric hammer head 2 is offset to the left, meaning the striking surface forms an angle α (α>90°) with the vertical plane. This generates a torsional force during hammering. Simultaneously, the flat-end wedge nut 4 and the concave wedge nut 3 press against each other, causing slight deformation of the threads, which also serves to prevent loosening. It can be understood that in other embodiments, the eccentric hammer head 2 can also be offset to the right (α<90°), the magnitude of which depends on the thread direction of the double-wish nut 1.

[0032] Example 2 like Figures 9 to 12 As shown, the anti-loosening eccentric hammer with pin-pulling function in this embodiment has a similar structural design and working principle to the anti-loosening eccentric hammer in embodiment 1. The main difference is that it also includes a conversion connector 6. Figure 9 and Figure 10 As shown, the eccentric hammer head 2, the flat-end wedge nut 4, and the concave wedge nut 3 are sequentially mounted on the hammer handle 5. Both the flat-end wedge nut 4 and the concave wedge nut 3 are screwed onto the second external thread 51 to limit the displacement of the front end of the eccentric hammer head 2 on the hammer handle 5. The handle 52 is used to limit the displacement of the rear end of the eccentric hammer head 2 on the hammer handle 5, so that the eccentric hammer head 2 can slide axially along the hammer handle 5 and stop at the handle 52 while being fitted onto the hammer handle 5. The adapter 6 passes through one end of the double-rotor nut 1 and is limited by the T-shaped aperture 13 at the lower part of the inner through-hole of the double-rotor nut 1. The other end of the double-rotor nut 1 is screwed onto the second external thread 51, and the end of the hammer handle 5 is pressed against the adapter 6. The adapter 6 is used to connect the threaded pin 7 to be removed, such as... Figure 12 As shown.

[0033] In this embodiment, when the eccentric hammer is to be used as a pin puller, the assembly sequence of the various components is as follows: Step 1: Insert the eccentric hammer head 2 into the hammer handle 5.

[0034] Step 2: Tighten the flat-end wedge nut 4 to the second external thread 51 of the hammer handle 5 to prevent the eccentric hammer head 2 from scratching the threads when it moves up and down.

[0035] Step 3: Screw the concave wedge nut 3 onto the second external thread 51 of the hammer handle 5 and tighten it with the flat-end wedge nut 4.

[0036] Step 4: Insert the adapter 6 for removing the pin into the T-shaped hole 13 of the double-rotor nut 1.

[0037] Step 5: Finally, screw the first internal thread 12 of the double-thread nut 1 into the second external thread 51 of the hammer handle 5, and tighten the end of the hammer handle 5 against the adapter 6. This completes the assembly of the pin puller. Figure 10 As shown. In practical applications, different types of adapters 6 can be selected according to the type of threaded pin 7 that needs to be removed.

[0038] The pin puller is mainly used to pull out threaded pins 7, which are pins with a threaded blind hole 71 in the middle. Figure 11 As shown. When using a pin puller to remove the threaded pin 7, first screw the pin puller adapter 6 (such as a screw) into the threaded blind hole 71 of the threaded pin 7, as shown. Figure 12 As shown. Then the eccentric hammer head 2 moves on the hammer handle 5. When the eccentric hammer head 2 stops sliding due to the obstruction of the handle 52, its power is transmitted to the hammer handle 5, and the resulting impact force drives the connected threaded pin 7 to be pulled out.

[0039] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. An anti-loosening eccentric hammer with a pin-pulling function, characterized in that, include: The hammer includes a double-spin nut (1), an eccentric hammer head (2), a concave wedge nut (3), a flat-end wedge nut (4), and a hammer handle (5). The front end of the hammer handle (5) is provided with a second external thread (51), and the rear end of the hammer handle (5) is provided with a handle (52). The eccentric hammer head (2) is provided with a through hammer hole (21) in the middle. The double-spin nut (1), eccentric hammer head (2), concave wedge nut (3), and flat-end wedge nut (4) are sequentially inserted through the front end of the hammer handle (5). The double-spin nut (1) is screwed and fixed on the second external thread (51) to limit the displacement of the front end of the eccentric hammer head (2) on the hammer handle (5). The concave wedge nut (3) and flat-end wedge nut (4) are both screwed and fixed on the second external thread (51) to limit the displacement of the rear end of the eccentric hammer head (2) on the hammer handle (5).

2. The anti-loosening eccentric hammer with pin-pulling function according to claim 1, characterized in that, It also includes a conversion connector (6), the eccentric hammer (2), the flat-end wedge nut (4) and the concave wedge nut (3) are sequentially mounted on the hammer handle (5), the flat-end wedge nut (4) and the concave wedge nut (3) are both screwed and fixed on the second external thread (51) to limit the displacement of the front end of the eccentric hammer (2) on the hammer handle (5), the handle (52) is used to limit the displacement of the rear end of the eccentric hammer (2) on the hammer handle (5) so that the eccentric hammer (2) can be sleeved on the hammer handle (5) to slide axially along the hammer handle (5) and stop at the handle (52); the conversion connector (6) passes through one end of the double-turn nut (1), the other end of the double-turn nut (1) is screwed and fixed on the second external thread (51), and the end of the hammer handle (5) is pressed against the conversion connector (6), the conversion connector (6) is used to connect the threaded pin (7) to be removed.

3. The anti-loosening eccentric hammer with pin-pulling function according to claim 2, characterized in that, The outer wall of the double-rotor nut (1) is provided with a first external thread (11), which is used to connect the eccentric hammer head (2); the upper part of the inner through hole of the double-rotor nut (1) is provided with a first internal thread (12), which matches the second external thread (51); the lower part of the inner through hole of the double-rotor nut (1) is provided with a T-shaped light hole (13), which is used to limit the conversion connector (6).

4. The anti-loosening eccentric hammer with pin-pulling function according to claim 3, characterized in that, The first external thread (11) is turned in the opposite direction to the first internal thread (12).

5. The anti-loosening eccentric hammer with pin-pulling function according to claim 2, characterized in that, The front end of the hammer hole (21) is provided with a second internal thread (22), which matches the first external thread (11) to realize the connection and fixation between the double-rotor nut (1) and the eccentric hammer head (2); the rear end of the hammer hole (21) is provided with a concave surface (23), which matches the front end of the concave wedge nut (3) to realize the concave wedge nut (3) pressing against the eccentric hammer head (2).

6. The anti-loosening eccentric hammer with pin-pulling function according to claim 5, characterized in that, The front end of the concave wedge nut (3) is provided with a boss (33), which matches the concave surface (23); the rear end of the concave wedge nut (3) is provided with a concave conical surface (32), which matches the front end of the flat-end wedge nut (4); the inner hole of the concave wedge nut (3) is provided with a third internal thread (31), which matches the second external thread (51).

7. The anti-loosening eccentric hammer with pin-pulling function according to claim 6, characterized in that, The front end of the flat-end wedge nut (4) is provided with a convex conical surface (42), which matches the concave conical surface (32). The rear end of the flat-end wedge nut (4) is a flat surface. The inner hole of the flat-end wedge nut (4) is provided with a fourth internal thread (41), which matches the second external thread (51).

8. The anti-loosening eccentric hammer with pin-pulling function according to any one of claims 1 to 7, characterized in that, The eccentric hammer (2) is an octagonal hammer, and the striking surface of the eccentric hammer (2) is an inclined plane.

9. The anti-loosening eccentric hammer with pin-pulling function according to any one of claims 1 to 7, characterized in that, The handle (52) is provided with knurling.

10. The anti-loosening eccentric hammer with pin-pulling function according to any one of claims 2 to 7, characterized in that, The double-spin nut (1), concave wedge nut (3), flat-end wedge nut (4) and adapter (6) are all made of T10 carbon tool steel and are hardened; the eccentric hammer head (2) is made of 45# carbon steel; the hammer handle (5) is made of T10 carbon tool steel.

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