Pin pulling structure

Abstract

The utility model discloses a pin pulling structure, which belongs to the technical field of pin pulling and comprises a pin shaft and a pin pulling seat, a large hole and a small hole are arranged in the pin pulling seat, the large hole is communicated with the small hole and penetrates through the pin pulling seat, the pin pulling seat comprises a pin pulling seat first end and a pin pulling seat second end, the large hole is positioned at the pin pulling seat first end, and the small hole is positioned at the pin pulling seat second end. The pin shaft is sequentially inserted into the large hole and the small hole, the outer diameter of the inserting end of the pin shaft is smaller than that of the other end of the pin shaft, a limiting part is arranged in the pin pulling base, an elastic piece is arranged between the limiting part and the large-outer-diameter end of the pin shaft, the inserting end of the pin shaft is sleeved with the elastic piece, and the two ends of the elastic piece abut against the large-outer-diameter end of the pin shaft and the limiting part respectively. The through hole is formed in the pin shaft inserting end, the cotter pin is detachably installed in the through hole, and the pin shaft on the pin pulling structure is high in durability, not prone to being broken due to stress and quite easy to take out.

Description

Technical Field

[0001] The utility model belongs to the technical field of pin pulling, and more specifically relates to a pin pulling structure. Background Art

[0002] The frame stranding machine is a device used to produce large square stranded wires. The equipment has a high operating rate and heavy production tasks. Reliable and effective operation of the equipment is an important guarantee for achieving production capacity targets.

[0003] At present, the frame stranding machine stranding tension disk is connected with screws, which are easy to loosen and fall off and are easily damaged after being stressed. It is very difficult to remove the installation fastening screws after they break, and the processing and maintenance workload is large. Utility Model Content

[0004] The main purpose of the utility model is to provide a pin pulling structure, which reduces the number of times the pin is damaged and improves durability.

[0005] The lockhole that is formed on the second end of the pin is formed on the second rim of the pin shaft, and the lockhole that is formed on the second end of the pin shaft is formed on the second rim of the pin shaft.

[0006] In a specific embodiment of the present invention, a round nut for tightening is threadedly connected to the outer side of the pin pulling seat, and the round nut can move along the length direction of the pin pulling seat.

[0007] In a specific embodiment of the present invention, the outer wall of the second end of the pin puller extends outward to form a clamping portion, and a clamping space is formed between the clamping portion and the round nut.

[0008] In a specific embodiment of the utility model, a protective sleeve is provided on the outer side of the first end of the pin puller, and a thread connected to a round nut is provided on the outer side of the protective sleeve.

[0009] In a specific embodiment of the present invention, a stop space for preventing the round nut from moving is formed between the pin pulling seat and the protective sleeve.

[0010] In a specific embodiment of the utility model, the pin shaft includes a first pin shaft portion and a second pin shaft portion, the first pin shaft portion and the second pin shaft portion are connected and cooperated with each other, the outer diameter of the first pin shaft portion is greater than the outer diameter of the second pin shaft portion, and the through hole crosses along the diameter direction of the second pin shaft portion and is arranged on the second pin shaft portion.

[0011] In a specific embodiment of the utility model, the length of the cotter pin is greater than the diameter of the small hole, and the cotter pin includes a first arc segment and two second arc segments, the two second arc segments are respectively connected to the two ends of the first arc segment, and the two second arc segments and the first arc segment are surrounded to form an opening, and the other ends of the two second arc segments converge horizontally and extend to the end of the cotter pin away from the opening.

[0012] In a specific embodiment of the utility model, the cotter pin also includes two vertical sections, the two vertical sections connect the two second arc sections, the two vertical sections pass through the through hole, and the length of one of the vertical sections is greater than the length of the other vertical section.

[0013] One of the above technical solutions of the utility model has at least one of the following advantages or beneficial effects:

[0014] This pin pulling structure inserts a pin shaft covered with an elastic member into the interior of the pin pulling seat, and the inserted end of the pin shaft passes through the large hole and the small hole of the pin pulling seat in sequence. The elastic member abuts between the large outer diameter end of the pin shaft and the limiting part of the pin pulling seat. The pin shaft is pressed hard to expose the through hole on the pin shaft, and a cotter pin is inserted into the through hole to fix the position of the pin shaft to prevent the pin shaft from rebounding under the action of the elastic member. At the same time, the pin shaft is highly durable, not easy to break under stress, and is very easy to remove. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The utility model is further described below in conjunction with the accompanying drawings and embodiments;

[0016] Figure 1 It is a cross-sectional view of a pin pulling structure in one embodiment of the utility model;

[0017] Figure 2 It is a cross-sectional view of a pin puller in one embodiment of the utility model;

[0018] Figure 3 It is a schematic diagram of the structure of a pin shaft in one embodiment of the utility model. DETAILED DESCRIPTION

[0019] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions from beginning to end. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0020] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0021] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0022] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more features.

[0023] In the description of the present utility model, it should be noted that, unless otherwise clearly stipulated and limited, the term "connection" should be understood in a broad sense. For example, it can be a fixed connection or a movable connection, a detachable connection or a non-detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, and it can be internal connection between two elements, indirect connection, or an interactive relationship between two elements.

[0024] The following disclosure provides many different embodiments or examples for implementing different solutions of the present invention.

[0025] Reference Figures 1 to 3As shown, a pin pulling structure is provided, including a pin shaft 1 and a hollow pin pulling seat 4, wherein a large hole 43 and a small hole 44 are provided inside the pin pulling seat 4, wherein the large hole 43 and the small hole 44 are connected and penetrate the pin pulling seat 4 together, wherein the two ends of the pin pulling seat 4 are respectively a first end 41 of the pin pulling seat and a second end 42 of the pin pulling seat, wherein the large hole 43 is located at the first end 41 of the pin pulling seat, and the small hole 44 is located at the second end 42 of the pin pulling seat, wherein the pin shaft 1 is inserted from the large hole 43 to the small hole 44, and the inserted end of the pin shaft 1 is exposed at the outside. On the surface of the pin puller 4, the outer diameter of the insertion end of the pin shaft 1 is smaller than the outer diameter of the other end of the pin shaft 1. A limiting portion 45 is provided at the connection point between the large hole 43 and the small hole 44 inside the pin puller 4. An elastic member 3 is provided between the limiting portion 45 and the large outer diameter end of the pin shaft 1. The elastic member 3 is sleeved on the insertion end of the pin shaft 1, and the two ends of the elastic member 3 respectively abut the large outer diameter end of the pin shaft 1 and the limiting portion 45. A through hole 11 is opened on the insertion end of the pin shaft 1, and a cotter pin 5 is detachably installed in the through hole 11.

[0026] The inner part of the pin puller 4 is formed by connecting a large hole 43 and a small hole 44. The insertion end of the pin shaft 1 is inserted from the large hole 43 to the small hole 44, and an elastic member 3 is sleeved on the insertion end of the pin shaft 1. A limit portion 45 is provided at the connection between the large hole 43 and the small hole 44. The limit portion 45 is formed by the large hole 43, the small hole 44 and the pin puller 4. The elastic member 3 is arranged between the limit portion 45 and the large outer diameter end of the pin shaft 1 to abut the pressure at both ends. Due to the presence of the elastic member 3, it is necessary to press the pin shaft 1 so that the through hole 11 on the insertion end of the pin shaft 1 is exposed on the surface of the pin puller 4, and then the cotter pin 5 is inserted into the through hole 11 so that it clamps the pin shaft 1 and does not rebound due to the action of the elastic member 3, so that the pin shaft 1 plays the effect of bearing force. The pin shaft 1 is made of 45# steel. Since the cotter pin 5 clamps the pin shaft 1 to rebound, it is not easy to loosen or fall off, and it is not easy to be damaged or broken after being subjected to force, providing reliable stability.

[0027] In one embodiment of the utility model, the outer side of the pin puller seat 4 is threadedly connected with a round nut 2 for tightening, and the round nut 2 can move along the length direction of the pin puller seat 4. Preferably, the round nut 2 is provided with a plurality of auxiliary grooves for assisting disassembly and installation, so as to facilitate disassembly and installation with specific tools.

[0028] Furthermore, the outer wall of the second end 42 of the pin puller seat extends outward to form a clamping portion 46, and a clamping space is formed between the clamping portion 46 and the round nut 2. The clamping portion 46 clamps one side of the tension disk of the frame stranding machine. The round nut 2 can be adjusted on the pin puller seat 4 according to the thickness of the tension disk by twisting the other side of the tension disk of the frame stranding machine.

[0029] In one embodiment of the utility model, a protective sleeve 6 is provided on the outer side of the first end 41 of the pin puller seat, and a thread connected to the round nut 2 is provided on the outer side of the protective sleeve 6. The protective sleeve 6 is used to protect the pin puller seat 4 from being damaged, and is provided with a thread that facilitates the twisting of the round nut 2.

[0030] Furthermore, in order to prevent the round nut 2 from continuing to twist toward the locking portion 46 and to avoid thread slippage caused by overtightening, a stop space 7 is formed between the pin puller 4 and the protective sleeve 6 to prevent the round nut 2 from moving.

[0031] In one embodiment of the utility model, the pin 1 includes a first pin portion 12 and a second pin portion 13, the first pin portion 12 and the second pin portion 13 are connected and cooperated with each other, the outer diameter of the first pin portion 12 is larger than the outer diameter of the second pin portion 13, the through hole 11 crosses along the diameter direction of the second pin portion 13 and is arranged on the second pin portion 13, and the cotter pin 5 is detachably arranged on the through hole 11 of the second pin portion 13.

[0032] In one embodiment of the utility model, the length of the cotter pin 5 is greater than the diameter of the small hole 44, which is convenient for clamping the pin shaft 1 to rebound, and the cotter pin 5 includes a first arc segment 51 and two second arc segments 52, the two second arc segments 52 are respectively connected to the two ends of the first arc segment 51, and the two second arc segments 52 and the first arc segment 51 are surrounded by an opening 53, and other objects can be inserted into the opening 53, and the other ends of the two second arc segments 52 converge horizontally and continue to extend to form two vertical segments 54 of the cotter pin 5, the two vertical segments 54 connect the two second arc segments 52, and the two vertical segments 54 pass through the through hole 11, and the two vertical segments 54 of the cotter pin 5 are inserted into the through hole 11 as much as possible to avoid a gap between the cotter pin 5 and the through hole 11, resulting in loose fixation, and the length of one of the vertical segments 54 is greater than the length of the other vertical segment 54, which is convenient for flipping and fixing to both sides to prevent the pin shaft 1 from rotating.

[0033] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A pin pulling structure, comprising a pin shaft (1) and a hollow pin pulling seat (4), characterized in that: The pin puller (4) is provided with a large hole (43) and a small hole (44) inside. The large hole (43) is connected to the small hole (44) and passes through the pin puller (4) together. The pin puller (4) comprises a first end (41) and a second end (42). The large hole (43) is located at the first end (41) of the pin puller, and the small hole (44) is located at the second end (42) of the pin puller. The pin shaft (1) is inserted from the large hole (43) into the small hole (44) and exposed on the surface of the pin puller. The outer diameter of the insertion end of the pin shaft (1) is smaller than that of the first end (41) of the pin puller. The pin shaft (1) has an outer diameter of the other end thereof, and the pin puller seat (4) is provided with a limiting portion (45) at the connection point between the large hole (43) and the small hole (44). An elastic member (3) is provided between the limiting portion (45) and the large outer diameter end of the pin shaft (1). The elastic member (3) is sleeved on the insertion end of the pin shaft (1). The two ends of the elastic member (3) respectively abut against the large outer diameter end of the pin shaft (1) and the limiting portion (45). The insertion end of the pin shaft (1) is provided with a through hole (11), and a split pin (5) is detachably installed in the through hole (11).

2. The pin pulling structure according to claim 1, characterized in that: The outer side of the pin pulling seat (4) is threadedly connected with a round nut (2) for fastening, and the round nut (2) can move along the length direction of the pin pulling seat (4).

3. The pin pulling structure according to claim 2, characterized in that: The outer wall of the second end (42) of the pin pulling seat extends outward to form a locking portion (46), and a clamping space is formed between the locking portion (46) and the round nut (2).

4. The pin pulling structure according to claim 1, characterized in that: The outer side of the first end (41) of the pin puller is provided with a protective sleeve (6), and the outer side of the protective sleeve (6) is provided with a thread connected to the round nut (2).

5. The pin pulling structure according to claim 4, characterized in that: A stop space (7) is formed between the pin pulling seat (4) and the protective sleeve (6) to prevent the round nut (2) from moving.

6. The pin pulling structure according to claim 1, characterized in that: The pin shaft (1) comprises a first pin shaft portion (12) and a second pin shaft portion (13), the first pin shaft portion (12) and the second pin shaft portion (13) being connected and matched with each other, the outer diameter of the first pin shaft portion (12) being larger than the outer diameter of the second pin shaft portion (13), and the through hole (11) being transversely extending along the diameter direction of the second pin shaft portion (13) and being arranged on the second pin shaft portion (13).

7. The pin pulling structure according to claim 1, characterized in that: The length of the cotter pin (5) is greater than the diameter of the small hole (44), and the cotter pin (5) comprises a first arc segment (51) and two second arc segments (52), the two second arc segments (52) are respectively connected to the two ends of the first arc segment (51), and the two second arc segments (52) and the first arc segment (51) surround to form an opening (53), and the other ends of the two second arc segments (52) merge horizontally and extend to an end of the cotter pin (5) away from the opening (53).

8. The pin pulling structure according to claim 7, characterized in that: The cotter pin (5) further comprises two vertical sections (54), the two vertical sections (54) connecting the two second arc sections (52), the two vertical sections (54) passing through the through hole (11), and the length of one of the vertical sections (54) being greater than the length of the other vertical section (54).

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