Portable hydraulic pin puller

Abstract

The utility model discloses a portable hydraulic pin puller, and belongs to the technical field of auxiliary pin pulling equipment. The positioning pin comprises a connecting part with an inner cavity, one end of the connecting part is provided with a first notch allowing the end of the positioning pin to extend into the inner cavity of the connecting part, and the peripheral wall of the connecting part is provided with a second notch; the other end of the connecting part is connected with a driving source, and the driving source is used for driving the connecting part to do linear reciprocating motion; and the limiting component enters the inner cavity of the connecting component through the second notch and is used for axially limiting the positioning pin part in the inner cavity. The portable hydraulic pin puller is simple in structure, convenient and fast to operate, capable of providing large driving force and beneficial to application and popularization. In addition, by arranging different limiting components, pin shifting operation of positioning pins of various structures can be achieved, and the application range of the device is greatly widened.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the auxiliary pin pulling equipment technical field more specifically, relate to a kind of portable hydraulic pin puller. BACKGROUND

[0002] The positioning pin is a kind of common positioning piece, and the common type has cylindrical pin, T-shaped pin and slot pin etc. The positioning pin is generally not disassembled after being loaded, but in some occasions where disassembly is required, the positioning pin still needs to be pulled out. For some clearance-fitted positioning pins, manual pin pulling can be used. However, for some interference-fitted or transition-fitted positioning pins, a pin puller needs to be used.

[0003] For example, in the patent CN112757221A, a pin puller and a using method are disclosed. The pin puller of the application comprises a double-headed screw rod, an upper plate, a lower plate, an extension mechanism and a lifting block for pulling out the pin. One end of the double-headed screw rod is screwed with the lifting block, and the other end is screwed with the upper plate. The extension mechanism comprises a screw rod, two upper support rods hingedly connected with the upper plate and two lower support rods hingedly connected with the lower plate. The two upper support rods and the two lower support rods are arranged in a quadrilateral structure, and the double-headed screw rod is located on the diagonal line of the quadrilateral structure. The upper support rod and the lower support rod on the same side of the double-headed screw rod are connected by a connecting shaft. The screw rod is screwed with the two connecting shafts, and rotating the screw rod can make the two connecting shafts approach or move away from each other, so as to drive the lifting block to lift or lower, thereby realizing the pin pulling operation. Although the pin puller of the application can realize the pin pulling function, its structure is relatively complex, and the operation is relatively cumbersome. In addition, the pin puller is not suitable for pulling out the cylindrical pin without a threaded hole, thereby limiting the use range of the pin puller. SUMMARY

[0004] 1. Problem to be solved

[0005] In view of at least some of the problems existing in the prior art, the utility model provides a portable hydraulic pin puller, which aims to solve the problem of the existing pin puller, complex structure and relatively cumbersome operation, thereby being not conducive to popularization.

[0006] 2. Technical solution

[0007] In order to solve the above problems, the utility model adopts the following technical solutions:

[0008] The utility model discloses a portable hydraulic pin puller, which comprises a connecting component with an inner cavity,

[0009] One end of the connecting component is provided with a first slot for the end of the positioning pin to enter the inner cavity of the connecting component, and a second slot is formed on the outer peripheral wall thereof;

[0010] The other end of the connecting part is connected with a driving source for driving the connecting part to make linear reciprocating motion.

[0011] and a limiting part,

[0012] The limiting part enters the inner cavity of the connecting part through the second notch, and is used for axially limiting the positioning pin part in the inner cavity.

[0013] Further, the limiting part is a cylindrical limiting rod.

[0014] Further, the limiting part is a limiting block with a U-shaped notch.

[0015] Further, the first notch is a rectangular opening as a whole, and the rectangular opening forms the limiting part.

[0016] Further, the second notch is arranged through the peripheral wall of the connecting part.

[0017] Further, the connecting part is a cylindrical structure as a whole, and a plurality of second notches are arranged along the peripheral wall of the connecting part.

[0018] Further, the driving source is a hydraulic cylinder, and the end of the connecting part away from the first notch is provided with a mounting notch for being connected with the output end of the hydraulic cylinder.

[0019] Further, the non-output end of the hydraulic cylinder is provided with a connecting lug, and the cylinder body of the hydraulic cylinder is provided with a handle.

[0020] 3, beneficial effects

[0021] Compared with the prior art, the beneficial effects of the utility model are:

[0022] (1) the utility model discloses a portable hydraulic pin puller, after the end of the to-be-pulled positioning pin is inserted into the inner cavity of the connecting part, the axial movement of the to-be-pulled positioning pin is limited by the limiting part, then the connecting part is pulled by the driving force of the driving source, and then the to-be-pulled positioning pin is pulled out by the limiting part. The pin puller of the utility model has the advantages of simple structure, convenient and fast operation, and can provide a large driving force, and is beneficial to popularization and application.

[0023] (2) the utility model discloses a portable hydraulic pin puller, the limiting part is designed as a cylindrical limiting rod, the limiting rod can pass through the positioning hole of the open hole straight pin, so that the pin pulling operation of the open hole straight pin is completed, the limiting part is designed as a limiting block with a U-shaped notch, the U-shaped notch is clamped at the annular groove of the slotted straight pin and the step of the T-shaped pin, so that the limiting operation of the slotted straight pin and the T-shaped pin is completed, so that the pin pulling operation of various structure positioning pins can be realized, and the application range of the equipment is greatly improved.

[0024] (3) The hand-held hydraulic pin extractor, the first slot is a rectangular opening, the step end of the T-shaped pin is first inserted through the rectangular opening, then the T-shaped pin is rotated by a certain angle, and thus axial positioning of the T-shaped pin is completed, so that the structure of the pin extractor is further simplified.

[0025] (4) The hand-held hydraulic pin extractor, the second slot is arranged on the outer circumferential wall of the connecting component, and the second slot is annular and has a plurality of openings, so that the insertion of the limiting component is facilitated, and the limiting position of the positioning pin is observed, and thus the limiting operation of the to-be-pulled positioning pin is facilitated. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 Fig. 1 is a structural schematic view of the hand-held hydraulic pin extractor of the present application;

[0027] Figure 2 Fig. 2 is a structural schematic view of the connecting component in the present application;

[0028] Figure 3 Fig. 3 is an embodiment of the limiting component in the present application;

[0029] Figure 4 Fig. 4 is another embodiment of the limiting component in the present application;

[0030] Figure 5 Fig. 5 is a structural schematic view of the to-be-pulled positioning pin in the present application, wherein (a) is a straight pin with an opening, (b) is a straight pin with a slot, and (c) is a T-shaped pin;

[0031] Figure 6 Fig. 6 is a schematic view of the cooperation between different limiting components and corresponding to-be-pulled positioning pins in the present application.

[0032] In the figure: 1, connecting component; 11, first slot; 12, second slot;

[0033] 2, driving source; 21, connecting lug; 22, handle; 3, limiting component. DETAILED DESCRIPTION

[0034] In order to further understand the content of the present application, the present application is described in detail in combination with the drawings.

[0035] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and 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. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0036] The present invention will be further described below with reference to specific embodiments.

[0037] like Figure 1 As shown, a portable hydraulic pin puller according to this embodiment includes a connecting component 1, a driving source 2, and a limiting component 3. The connecting component 1 has an inner cavity. After the end of the positioning pin to be removed extends into the inner cavity, the limiting component 3 axially limits the end. Then, the driving source 2 pulls the connecting component 1 horizontally, thereby pulling the positioning pin to be removed through the limiting component 3 to achieve the final pin pull operation.

[0038] Specifically, refer to Figure 2 As shown, the connecting component 1 is a cylindrical structure. One end of the cylindrical structure has a first groove 11, and its outer peripheral wall has a second groove 12. Both the first groove 11 and the second groove 12 are connected to the inner cavity of the connecting component 1. The end of the positioning pin to be disassembled can extend into the inner cavity of the connecting component 1 through the first groove 11. The limiting component 3 can enter the inner cavity of the connecting component 1 through the second groove 12 and axially limit the positioning pin portion located in the inner cavity.

[0039] The other end of the connecting component 1 is provided with a mounting slot, through which the output end of the drive source 2 is connected to the connecting component 1 to provide the pin-pulling power to the connecting component 1. The drive source 2 can be a hydraulic cylinder, and the cylinder body is provided with a handle 22 for easy gripping of the entire pin puller. Meanwhile, a connecting lug 21 is provided at the end of the hydraulic cylinder furthest from the connecting component 1 (i.e., the non-output end) for connecting other automated equipment, such as a robotic arm.

[0040] by Figure 5 As shown, several common locating pins are illustrated, including (a) a perforated straight pin; (b) a slotted straight pin; and (c) a T-pin. To enable pin pulling operations on locating pins of different structures and improve the applicability of the pin puller, this embodiment is equipped with different limiting components 3 for different locating pins.

[0041] Specifically, refer to Figure 3As shown, for the perforated pin, a cylindrical limiting rod can be selected as the limiting component 3. The limiting rod is inserted into the second slot 12 and passes through the positioning hole on the perforated pin to complete the limiting of the perforated pin.

[0042] like Figure 4 As shown, for T-pins and slotted pins, a limiting block with a U-shaped groove can be used as the limiting component 3. The limiting block is engaged with the annular groove of the slotted pin or the step of the T-pin through the U-shaped groove, thus completing the limiting operation of the slotted pin and the T-pin.

[0043] Furthermore, by utilizing the difference in length and width of the stepped end of the T-pin, the first slot 11 can be designed as a rectangular opening, with the width of this rectangular opening slightly larger than the width of the stepped end of the T-pin and smaller than the length of the stepped end of the T-pin; naturally, the length of the rectangular opening must also be greater than the length of the stepped end of the T-pin. After the stepped end of the T-pin enters the inner cavity of the connecting component 1 through this rectangular opening, it rotates a certain angle, preferably 90°. At this time, the length and width of the stepped end of the T-pin are staggered with the length and width of the rectangular opening, thereby limiting the step end of the T-pin. It should be noted that the rectangular opening mentioned above does not necessarily have to be a purely geometric rectangular structure; as long as it is similar to a rectangular structure overall, it can be an elliptical structure, an oblong hole structure, etc.

[0044] To facilitate observation of the limiting portions of each positioning pin and to facilitate the insertion of the limiting component 3, in this embodiment, the second slot 12 is provided through the outer peripheral wall of the connecting component 1, and multiple second slots 12 are provided along the outer peripheral wall of the connecting component 1 in a ring. It is worth noting that the limiting portion of the positioning pin refers to the part where the positioning pin and the limiting component 3 cooperate with each other. Specifically, for a perforated straight pin, the positioning hole is the limiting portion; for a slotted straight pin, the annular groove is the limiting portion; and for a T-pin, the inner end face of the step is the limiting portion.

[0045] refer to Figure 6 As shown, schematic diagrams of the fit between different limiting components 3 and corresponding positioning pins are given. Among them, (d) is a schematic diagram of the fit between the rod-shaped limiting component 3 and the perforated straight pin; (e) is a schematic diagram of the fit between the limiting component 3 with the U-shaped groove and the slotted straight pin; (f) is a schematic diagram of the fit between the first groove 11 as the limiting component 3 and the T-pin.

[0046] The embodiment of the application is a portable hydraulic pin puller, after the end of the to-be-pulled positioning pin is inserted into the inner cavity of the connecting part 1, the axial movement of the to-be-pulled positioning pin is limited by the limiting part 3; then the connecting part 1 is pulled by the driving force of the driving source 2, and the to-be-pulled positioning pin is pulled out through the limiting part 3. Compared with the traditional pin puller, the structure is simple, the operation is convenient and fast, and a larger driving force can be provided, which is beneficial to popularization and application. In addition, by being provided with different forms of limiting parts 3, the pin pulling operation of various structural positioning pins can be realized, and the application range of the equipment is greatly improved.

[0047] The above description of the application and its embodiments is illustrative, and is not restrictive, and the embodiments shown in the drawings are only one of the embodiments of the application, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by the application, without departing from the spirit of the application, similar structural modes and embodiments can be designed without creativity, which should belong to the protection scope of the application.

Claims

1. A hand-held hydraulic pin puller characterized by: The utility model relates to a connecting component (1) with an inner cavity, One end of the connecting component (1) is provided with a first slot (11) for the end of a positioning pin to enter the inner cavity of the connecting component (1), and a second slot (12) is formed in the outer peripheral wall of the connecting component (1); The other end of the connecting component (1) is connected with a driving source (2) for driving the connecting component (1) to perform linear reciprocating motion; and a limiting component (3), The limiting component (3) enters the inner cavity of the connecting component (1) through the second slot (12) and is used for axially limiting the part of the positioning pin in the inner cavity.

2. A hand-held hydraulic pin extractor according to claim 1, characterized in that: The limiting component (3) is a cylindrical limiting rod.

3. A hand-held hydraulic pin extractor according to claim 1, wherein: The limiting component (3) is a limiting block with a U-shaped slot.

4. A hand-held hydraulic pin extractor according to claim 1, wherein: The first slot (11) is a whole rectangular opening, and the rectangular opening forms the limiting component (3).

5. A hand-held hydraulic pin extractor according to any one of claims 1-4, characterized in that: The second slot (12) is arranged through the outer peripheral wall of the connecting component (1).

6. A hand-held hydraulic pin extractor according to claim 5, wherein: The connecting component (1) is a whole cylindrical structure, and a plurality of second slots (12) are arranged around the outer peripheral wall of the connecting component (1).

7. A hand-held hydraulic pin extractor as defined in claim 5 wherein: The driving source (2) is a hydraulic cylinder, and the end of the connecting component (1) away from the first slot (11) is provided with a mounting slot for being connected with the output end of the hydraulic cylinder.

8. A hand-held hydraulic pin extractor according to claim 7, wherein: The non-output end of the hydraulic cylinder is provided with a connecting lug (21), and a handle (22) is arranged on the cylinder body of the hydraulic cylinder.

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