Pin puller resetting tool

Abstract

The invention provides a reset tool for a pin puller. The reset tool comprises a supporting assembly, a sliding assembly and a force transmission assembly. The supporting assembly provides overall supporting and acting supporting points for the tool. The sliding assembly comprises a sliding bolt, a bearing bolt and a connecting shaft, the upper end of the sliding bolt is connected with the force transmission pin, the lower end of the connecting shaft is connected with a sliding pin on the reset object pin puller, and the sliding bolt is connected with the connecting shaft through the bearing bolt; the force transmission assembly comprises a handle and a force transmission pin, and based on the lever principle, downward pressure exerted on the handle by an operator is transmitted to the sliding assembly through the force transmission pin to pull the sliding assembly to move upwards, so that the sliding pin of the pin puller is pulled out of the retainer, and resetting is completed. The movement of the sliding assembly is always kept in the longitudinal direction, and the resetting operation is labor-saving and efficient; the problem of jamming during reset operation can be avoided, and the reset reliability is high; extension sections can be additionally arranged on the lower sections of the supporting frame and the connecting shaft according to needs to be matched with different application scenes, and universality is high.

Description

Technical Field

[0001] The present invention relates to the technical field of mechanical tooling, and particularly relates to a mechanical tooling for the reset operation of a pin puller. Background Art

[0002] During the working process of a mechanical device, it is necessary to constrain some components in a certain state and release the constraint according to an instruction after reaching the specified working condition. This function is realized by an unlocking mechanism. In the prior art, a pin puller is a typical unlocking mechanism, which is fixed on a connecting structure and restricts the movement of a separating structure through a protruding sliding pin; when unlocking is required, the sliding pin is driven to contract to release the limit on the separating structure.

[0003] Patent CN112777005A discloses a shape memory alloy pin puller with high shear resistance. Its structure is shown in Figures 1(a) and 1(b). In the locked state, the driving spring is completely compressed, and the ball is kept in balance under the combined action of the sliding sleeve, the cage and the sliding pin. The sliding pin is constrained by the ball and remains in the protruding state to achieve the locking function. When unlocking is required, an SMA wire is energized. After the SMA wire is heated, it contracts, driving the sliding sleeve to move upward. The ball loses balance and falls into the storage space at the lower part of the sliding sleeve. The sliding pin moves downward under the action of the pressing force of the driving spring to complete pin pulling, and at the same time, the return spring enters the compressed state. When resetting is required, the sliding pin is pulled out of the cage by using the reset tooling as shown in Figure 2 After the sliding pin moves a certain distance, the trapezoidal groove of the sliding pin reaches the circular hole of the cage. The ball enters the trapezoidal groove of the sliding pin under the lateral pressure of the inclined surface of the middle groove of the sliding sleeve. The return spring pushes the sliding sleeve downward until the inclined surface of the upper groove of the sliding sleeve contacts the ball, thus completing the reset of the pin puller. This invention adopts a sliding pin - cage structure with shaft - hole type fit and an indirect driving method, and has technical advantages such as high fitting accuracy, large load - bearing capacity, smooth pin pulling, and high reliability.

[0004] The reset tool disclosed in the above patent adopts the lever principle to apply downward pressure to the upper ends of the two handles (in the direction shown in the figure). The lower end of the handle "pries" the arc surface area of the sliding bolt to move the sliding bolt upward, thereby driving the bolt connected to the pin puller sliding pin to move upward, thereby realizing the reset function of pulling the sliding pin out of the retaining frame. The tooling is based on the working principle of "friction prying". In order to successfully complete the reset operation, it is necessary to ensure that the handle is not stuck during the downward pressing process, and that the arc surface of the lower end of the handle and the sliding bolt cannot be separated. This inevitably requires precise matching of the lower end of the handle and the arc surface of the sliding bolt, and therefore has high requirements for the processing and assembly of parts; after the reset tooling is used more and more times, the friction between the mating surfaces is bound to cause a certain amount of wear and tear, and the problem of slippage during operation is difficult to avoid; when the pressure applied to the handles on both sides is very different, the force on the arc surfaces on both sides of the sliding bolt is uneven, and the lateral force on the sliding bolt cannot be completely offset, which easily causes the sliding bolt to get stuck and unable to move, leading to reset failure; in addition, the mating surface of the lower end of the reset tooling and the sliding bolt is approximately in line contact, the friction force transmission efficiency is low, and the reset operation is laborious. Summary of the invention

[0005] In view of the above-mentioned deficiencies of the prior art pin puller reset tooling, the present invention provides a reset tooling suitable for the pin puller, which has the characteristics of simple structure, high reliability, and labor saving. The technical solution adopted by the present invention to solve the above-mentioned technical problems is: a pin puller reset tooling, which includes three parts: a support assembly, a sliding assembly, and a force transmission assembly. The support assembly provides overall support and a working fulcrum for the tooling, the sliding assembly is connected to the sliding pin on the pin puller of the reset object, and the force transmission assembly is based on the principle of a lever, which transmits the force input by the operator to the sliding assembly, pulls the sliding assembly to move, thereby pulling the sliding pin out of the pin puller retainer to achieve the reset of the pin puller.

[0006] The sliding assembly includes a sliding bolt, a bearing bolt and a connecting shaft, and the sliding bolt and the connecting shaft are connected by the bearing bolt. The lower section of the sliding bolt is a hollow cylindrical structure, and the upper section is a U-shaped groove for accommodating the handle head. A through hole is provided at the bottom of the U-shaped groove for the bearing bolt to pass through, and the through hole is connected with the center hole of the lower section of the sliding bolt. Pin holes are provided on the two ears of the U-shaped groove. The connecting shaft is a stepped shaft structure, and a threaded portion is provided at the lower part. The connecting shaft can be screwed into the reset threaded hole at the top of the sliding pin (hereinafter referred to as the sliding pin) of the reset object pin puller by rotating the connecting shaft; a center hole with an internal thread is provided at the top of the connecting shaft for matching with the threaded portion of the bearing bolt. The bearing bolt is inserted from the through hole at the bottom of the U-shaped groove of the sliding bolt, passes through the center hole of the lower section of the sliding bolt, and the lower end is connected with the internal thread of the connecting shaft 7. There is a clearance fit between the bearing bolt and the sliding bolt, so that the connecting shaft can automatically rotate relative to the sliding bolt, which can not only ensure that the sliding bolt transmits the pulling force of the up and down movement to the connecting shaft, but also avoid the transmission of torque to the sliding bolt when the connecting shaft rotates.

[0007] The support assembly includes a support frame, a sliding bearing, and a rotating shaft.

[0008] The support frame is generally divided into three sections: upper, middle, and lower. The upper section is mainly used to connect the handle and accommodate the handle for lever operation, while the middle and lower sections are used to provide a sliding space for the sliding assembly.

[0009] The upper section of the support frame is provided with a support frame rotating shaft hole, a handle groove, and a pin mounting hole: Two support frame rotating shaft holes are provided through the front and rear directions, corresponding to the handle rotating shaft holes on the two handles respectively, for installing the rotating shaft to provide a fulcrum for the handle; The handle groove is provided through the left and right directions, and is a kidney-shaped hole when viewed from the left / right side. The handle groove is used to accommodate the handle and the upwardly moving sliding assembly, and provides an operating space for the handle; The pin mounting hole is a through hole provided on the front or rear of the support frame. This hole is a threaded hole with a diameter larger than the force transmission pin, and is used to pass the force transmission pin through this hole during assembly to connect the handle and the sliding bolt. After the force transmission pin is installed, a screw can be screwed into this hole for plugging.

[0010] The middle and lower sections of the support frame are integrally a longitudinally hollow cylindrical structure. The inner hole of the middle and lower sections is communicated with the kidney-shaped handle groove of the upper section. The sliding bolt and the support frame are in a hole-shaft sliding fit, and the sliding bolt can slide up and down in the support frame. The middle section of the support frame is provided with a connecting shaft rotation groove, which is used to operate the rotation of the connecting shaft to realize the threaded connection between the thread at the lower end of the connecting shaft and the internal threaded hole at the top of the sliding pin.

[0011] In addition, a sliding bearing is installed inside the lower section of the support frame. The central hole of the sliding bearing and the connecting shaft are in a hole-shaft precision fit, which can ensure that the free rotation and longitudinal sliding of the connecting shaft do not interfere with each other.

[0012] The force transmission assembly includes two handles on the left and right and a force transmission pin connecting the heads of the two handles. One head of the handle is a U-shaped structure, and the other head is a flat structure. Pin holes for installing the force transmission pin are provided on both the U-shaped structure and the flat structure. The flat structure is inserted into the U-shaped structure and jointly embedded in the U-shaped groove of the sliding bolt. The force transmission pin passes through the pin hole of the sliding bolt and the pin holes on the handle, so as to connect the handle head and the sliding bolt; Rotating shaft holes are also provided on the two handles, and their positions correspond to the rotating shaft holes on the support frame, and are used to insert the rotating shaft to connect the handle and the support frame, providing a fulcrum for the lever operation of the handle.

[0013] During the reset operation, align the lower end of the support frame with the cage of the pull pin extractor, twist the connecting shaft through the connecting shaft rotation groove, screw the threaded part at its lower end into the internal threaded hole at the top of the sliding pin, and then apply a downward pressure to both handles. Through the lever action, the sliding assembly moves upward, driving the sliding pin to be pulled out of the cage, and the reset of the pull pin extractor is completed.

[0014] Furthermore, a set screw hole is also provided at the top of the support frame, which is used to screw in a screw to press the rotating shaft to prevent it from accidentally coming out.

[0015] Further, the pin hole on the handle for installing the force - transmitting pin is an oval hole, which has a low assembly operation difficulty and can prevent the problem that the two - side handles interfere with each other and get stuck.

[0016] Further, a groove for accommodating a retaining ring is also provided inside the lower section of the support frame for installing the retaining ring to limit the sliding bearing.

[0017] Further, the lower section of the support frame is provided with an external thread, which can be connected to an extension section to adapt to different application scenarios.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] (1) Labor - saving operation. The upper end of the connecting shaft of the present invention is connected to the sliding bolt through a bearing bolt, and the lower end is in precise hole - shaft fit with the central hole of the sliding bearing. The sliding bolt and the support frame are in hole - shaft sliding fit, and the sliding bolt and the bearing bolt are in clearance fit, which can ensure that the movement of the sliding bolt and the connecting shaft always remains longitudinal, and the reset operation is labor - saving and efficient.

[0020] (2) High reliability. The present invention uses a force - transmitting pin to transmit the acting force of the handle to the sliding bolt, and the connection between the handle and the force - transmitting pin uses an oval hole, which is easy to install. The force application processes of the two - side handles do not interfere with each other, and the reset operation can be completed by applying force to one side handle, effectively avoiding the problem of jamming caused by uneven force or interference between the two - side handles, and the reset operation has high reliability.

[0021] (3) Strong versatility. Both the lower section of the support frame and the lower section of the connecting shaft of the present invention are provided with external thread structures, which can be equipped with extension sections or change the end shape, so as to match different application scenarios and usage requirements, be applicable to the reset operations of various pin pullers, and can also be popularized and used in similar occasions with pulling requirements. Description of the Drawings

[0022] Figure 1(a) is a schematic structural diagram of the locking state of a prior - art pin puller;

[0023] Figure 1(b) is a schematic structural diagram of the unlocking state of a prior - art pin puller;

[0024] Figure 2 is a schematic structural diagram of a prior - art pin puller reset tooling;

[0025] Figure 3 is an external shape schematic diagram of the reset tooling of the present invention;

[0026] Figure 4 is a schematic structural diagram of the initial state of the reset tooling of the present invention;

[0027] Figure 5Schematic diagram of the structure of the reset tooling of the present invention after the reset operation is completed;

[0028] Figure 6 Schematic diagram of the sliding bolt structure of the present invention;

[0029] Figure 7 Assembly schematic diagram of the sliding bolt and the handle of the present invention;

[0030] Figure 8 Schematic diagram of the support frame structure of the present invention;

[0031] Meanings of the reference numerals in the drawings: 1. Handle; 2. Force transmission pin; 3. Rotating shaft; 4. Bearing bolt; 5. Sliding bolt; 6. Support frame; 7. Connecting shaft; 8. Sliding bearing; 9. Retaining ring; 101. Left handle; 102. Right handle; 103. Handle rotating shaft hole; 501. Pin hole; 502. U-shaped groove; 601. Set screw hole; 602. Support frame rotating shaft hole; 603. Handle groove; 604. Pin installation hole; 605. Connecting shaft rotating groove; 606. External thread Detailed implementation manners

[0032] The present invention will be further described below in conjunction with the drawings and the detailed implementation manners.

[0033] The present invention provides a reset tooling for a pin puller, and its overall structure is as Figures 3 - 5 shown. It is similar in shape to a wine bottle opener and includes a handle 1, a force transmission pin 2, a rotating shaft 3, a bearing bolt 4, a sliding bolt 5, a support frame 6, a connecting shaft 7, a sliding bearing 8 and a retaining ring 9.

[0034] The sliding bolt 5, the bearing bolt 4 and the connecting shaft 7 are sliding components. The structure of the sliding bolt 5 is as Figure 6 shown. Its lower section is a hollow cylindrical structure, and its upper section is a U-shaped groove 502 for accommodating the head of the handle 1. A through hole for the bearing bolt 4 to pass through is provided at the bottom of the U-shaped groove 502, and pin holes 501 are provided on both ears. The connecting shaft 7 is a stepped shaft structure. An external thread matching the internal thread of the reset hole at the top of the sliding pin of the pin puller is provided at the lower part, and a central hole with an internal thread is provided at the top for connecting the bearing bolt 4. The bearing bolt 4 passes through the through hole at the bottom of the U-shaped groove 502 of the sliding bolt 5, and the lower end is connected to the internal thread of the central hole at the top of the connecting shaft 7, thereby connecting the sliding bolt 5 and the connecting shaft 7. The bearing bolt 4 and the sliding bolt 5 are in clearance fit, and the connecting shaft 7 can rotate automatically relative to the sliding bolt 5. Thus, it can not only ensure that the sliding bolt 5 transmits the pulling force of the up and down movement to the connecting shaft 7, but also prevent the connecting shaft 7 from transmitting torque to the sliding bolt 5 when rotating.

[0035] The handle 1 includes a left handle 101 and a right handle 102, and the specific structure is as Figure 7As shown, the head of the left handle 101 is a U-shaped structure, and the head of the right handle 102 is a flat structure (the end close to the sliding bolt 5 in the figure is called the head). Waist-shaped pin holes are provided on both the U-shaped structure and the flat structure. The flat structure of the right handle 102 is inserted into the U-shaped structure of the left handle 101 and jointly embedded in the U-shaped groove 502 of the sliding bolt. The transmission pin 2 passes through the pin hole 501 of the sliding bolt 5 and the waist-shaped hole of the head of the handle 1, thereby connecting the handle 1 and the sliding bolt 5. A handle rotating shaft hole 103 (the same for both the left and right handles) is also provided on the handle 1 for passing through the rotating shaft 3, thereby connecting the handle 1 and the support frame 6 and providing a fulcrum for the lever operation of the handle 1.

[0036] The structure of the support frame 6 is as Figure 8 shown. It is divided into three sections: upper, middle, and lower. The upper section is mainly used to connect the handle 1 and accommodate the handle 1 for lever operation. The upper section of the support frame 6 is provided with a set screw hole 601, a support frame rotating shaft hole 602, a handle groove 603, and a pin mounting hole 604. The support frame rotating shaft hole 602 is arranged in the front-back direction, and its position corresponds to the handle rotating shaft hole 103 for installing the rotating shaft 3 to provide a fulcrum for the handle 1. Four set screw holes 601 at the top are used to screw in set screws (not shown in the figure) to press the rotating shafts 3 on both sides to prevent them from accidentally coming out. The handle groove 603 is arranged in the left-right direction of the support frame 6. Its shape is waist-shaped and runs through horizontally to provide an operation space for the handle. The pin mounting hole 604 is a through hole provided on the front side or the rear side (only one side needs to be set) for passing through the transmission pin 2 to connect the handle 1 and the sliding bolt 5. This hole is a threaded hole, and after the transmission pin 2 is installed, a screw needs to be screwed into the pin mounting hole 604 for plugging. The middle and lower sections of the support frame 6 are integrally a longitudinally hollow cylindrical structure. The inner hole of the middle and lower sections communicates with the transverse handle groove of its upper section and can accommodate the sliding assembly to move up and down. There is a hole-shaft sliding fit between the sliding bolt 5 and the support frame 6, and the sliding bolt 5 can slide up and down in the support frame 6. The connecting shaft rotating groove 605 is located in the middle section of the support frame 6 and is used to operate the rotation of the connecting shaft 7 so that the thread at the lower end of the connecting shaft is connected to the internal thread hole at the top of the pull pin slider. The lower section of the support frame 6 is provided with an external thread 606, and the support frame can be extended or the end shape can be changed according to different application scenarios and usage requirements.

[0037] In addition, a sliding bearing 8 and a retaining ring 9 for limiting the sliding bearing 8 are installed inside the lower section of the support frame 6. The inner hole of the sliding bearing 8 and the connecting shaft 7 are in precise hole-shaft fit, which can ensure the free rotation and up-and-down sliding of the connecting shaft 7.

[0038] It should be noted that the above descriptions of directions, such as "bottom", "top", "left", "right", "upper", "lower", etc., are all based on the directions or positional relationships shown in the accompanying drawings, or the directions or positional relationships in which the products of the present invention are usually placed during use. They are only for the convenience of description and do not indicate or imply that the components involved must have specific directions, structures or operations. In addition, for the sake of simplicity of the accompanying drawings, some structures or features in the accompanying drawings, such as holes, grooves, screws, etc., are not fully marked. Although the reference numerals in the accompanying drawings only point to one or several of them, the described content represents all the same features.

[0039] What is not elaborated in detail in the present invention belongs to the well-known technology in the art. The above are only the preferred embodiments of the present invention and do not limit the present invention in any form. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A reset tool for a pin puller, comprising three parts: a support component, a sliding component, and a force transmission component; the support component provides overall support and a working fulcrum for the tool, the sliding component is connected to the sliding pin of the reset object, and the force transmission component transmits the force input by the operator to the sliding component to pull the sliding component upward, thereby pulling out the sliding pin and realizing the reset of the pin puller; characterized in that: The sliding component includes a sliding bolt (5), a bearing bolt (4), and a connecting shaft (7); the lower section of the sliding bolt (5) is a hollow cylindrical structure, and the upper section is a U-shaped groove for accommodating the head of the handle (1). A through hole communicating with the central hole of the lower section of the sliding bolt (5) is provided at the bottom of the U-shaped groove, and pin holes for installing the force transmission component are provided on the two ears of the U-shaped groove; the bearing bolt (4) passes through the sliding bolt (5) and is connected to the connecting shaft (7), and the lower end of the connecting shaft (7) is connected to the sliding pin. The support component includes a support frame (6) and a rotating shaft (3); the upper section of the support frame (6) is provided with a support frame rotating shaft hole for installing the rotating shaft (3) and a handle groove for accommodating the handle (1). Two support frame rotating shaft holes are provided in the front-back direction, and the handle groove is provided in the left-right direction; the middle and lower sections of the support frame (6) are integrally a longitudinally hollow cylindrical structure, and the inner hole of the middle and lower sections communicates with the handle groove in the upper section; a connecting shaft rotating groove is also provided in the middle section of the support frame (6) for operating the rotation of the connecting shaft (7). The force transmission component includes two handles (1) on the left and right and a force transmission pin (2) connecting the heads of the two handles; one head of the handle is a U-shaped structure, and the other head is a flat structure. Pin holes for installing the force transmission pin (2) are provided on both the U-shaped structure and the flat structure. The flat structure is inserted into the U-shaped structure and jointly embedded in the U-shaped groove of the sliding bolt (5). The force transmission pin (2) passes through the pin holes of the sliding bolt (5) and the pin holes on the handle (1), so that the head of the handle (1) is connected to the sliding bolt (5); handle rotating shaft holes are also provided on the two handles (1), and their positions correspond to the support frame rotating shaft holes for passing through the rotating shaft (3), thereby providing a fulcrum for the lever operation of the handle (1). During the reset operation, align the lower end of the support frame (6) with the cage of the pin puller, twist the connecting shaft (7) through the connecting shaft rotating groove, screw the threaded part at its lower end into the internal threaded hole at the top of the sliding pin of the pin puller, and then apply a downward pressure to the two handles (1) on both sides. Through the lever action, the sliding component moves upward, thereby driving the sliding pin out of the cage, and the reset of the pin puller is completed.

2. The pull pin reset tooling according to claim 1, characterized in that The support component further includes a sliding bearing (8), and the sliding bearing (8) is installed inside the lower section of the support frame (6). The central hole of the sliding bearing (8) and the connecting shaft (7) are in precise hole-shaft fit, which can ensure that the connecting shaft (7) rotates freely and slides longitudinally without interference.

3. The reset tooling for the pin puller as described in claim 1 or 2, characterized in that, A hole-shaft sliding fit is provided between the sliding bolt (5) and the support frame (6), and a clearance fit is provided between the sliding bolt (5) and the bearing bolt (4), which can ensure that the movement of the sliding component always remains longitudinal and avoid transmitting torque to the sliding bolt (5) when the connecting shaft (7) rotates.

4. The pin extraction tool reset tooling according to claim 3, characterized in that The connecting shaft (7) has a stepped shaft structure, with a central hole with internal threads at the top for mating with the bearing bolt (4), and external threads at the lower section for screwing into the reset threaded hole of the sliding pin.

5. The pin extraction device reset tooling according to claim 3, characterized in that The lower section inside the support frame (6) is also provided with a groove for installing a retaining ring (9) to longitudinally limit the sliding bearing (8).

6. The pin extraction device reset tooling according to claim 3, characterized in that, The support frame (6) is also provided with a pin mounting hole, which is a threaded through-hole with a diameter larger than the force-transmitting pin (2). During assembly, the force-transmitting pin (2) is inserted through this hole to connect the handle (1) and the sliding bolt (5). After the force-transmitting pin (2) is installed, the pin mounting hole is plugged with a screw.

7. The pin extractor reset tooling according to claim 6, characterized in that, The pin mounting hole is only provided on the front or the back of the support frame (6).

8. The pin extractor reset tooling according to claim 3, characterized in that, The top of the support frame (6) is also provided with a set screw hole for screwing in a screw to press the rotating shaft (3) to prevent it from accidentally coming out.

9. The pin extractor reset tooling according to claim 3, wherein The pin hole on the handle (1) for connecting with the force-transmitting pin (2) is an oblong hole, which is convenient for assembly and can avoid the jamming problem caused by interference or uneven force on both sides of the handle during the reset operation.

10. The pin extractor reset tooling according to claim 3, characterized in that, Both the lower section of the support frame (6) and the lower section of the connecting shaft (7) are provided with external thread structures, and an extension section can be added or the end shape can be changed to match different application scenarios and usage requirements.

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