Large-load spring stretching assembly tool and using method thereof

Abstract

The invention discloses a heavy-load spring stretching and assembling tool and a using method thereof, and solves the problems that a heavy-load spring is difficult to stretch and extremely laborious in the assembling process, and the heavy-load spring stretching and assembling tool comprises a fixed cylinder, a sleeve, a stretching part and a limiting pin; the other end of the fixed cylinder is open; the fixed end of the spring is bolted with the closed end of the fixed cylinder, and a spring hanging plate is fixed at the stretching end of the spring; one end of the sleeve is open and can be clamped with the open end of the fixed cylinder; a sealing plate is fixed at the other end; the stretching part comprises a screw rod, a pulling block and a nut; the pull block is fixed at one end of the screw rod and can be fastened with the spring hanging plate through a pin shaft; the other end of the screw extends towards the inner cavity of the sleeve and penetrates through the sealing plate; the nut is located on the outer side of the sleeve and screwed on the screw, and the end face of the nut rotationally abuts against the plate face of the sealing plate to drive the screw to stretch the spring. After the spring is stretched, the limiting pin is inserted into the spring from the fixing cylinder to lock the stretching state of the spring.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of spring stretching, in particular to a special tool and method for pre-stretching and installing a spring of a large-load operating mechanism in a high-voltage electrical switch device BACKGROUND In the spring operating mechanism of high-voltage switch breakers, disconnectors and other devices, a large-load spring is generally used as an energy storage element. When the device is assembled or the spring is replaced and maintained, the spring in a free state needs to be stretched to a specified position and installed, and this process needs to overcome a huge spring force. At present, simple tools such as pry bars and hooks are generally used to stretch cooperatively by manual operation, which is not only time-consuming and laborious, but also has low efficiency, and there are serious safety hazards such as tool slipping and spring shooting, which can easily cause harm to the operator. At present, there is a lack of a special tool that can safely, efficiently and labor-savingly complete the stretching and assembly of such a large-load spring.

[0002] Therefore, it is of great significance to develop a special spring stretching tool to ensure operation safety, improve production efficiency and reduce labor intensity. SUMMARY

[0003] Therefore, the present application provides a large-load spring stretching and assembling tool and a using method thereof, which solves the problems of difficult stretching and extremely laborious of the large-load spring in the assembly process.

[0004] In order to achieve the above-mentioned purpose, the present application adopts the following technical solutions: A large-load spring stretching and assembling tool, comprising: A fixed cylinder, one end of which is closed and the other end is open; the inner cavity of the fixed cylinder is used for placing a spring, and the fixed end of the spring is bolted with the closed end of the fixed cylinder, and the stretching end is fixed with a spring hanging plate; A sleeve, one end of which is open and can be connected with the open end of the fixed cylinder, and the other end is fixed with an enclosing plate; A stretching part, comprising a screw rod, a pulling block and a nut; the pulling block is fixed at one end of the screw rod and can be fastened with the spring hanging plate through a pin shaft; the other end of the screw rod extends into the inner cavity of the sleeve and penetrates through the enclosing plate; the nut is located outside the sleeve and is screwed on the screw rod, and the end face thereof is in rotational abutment with the plate face of the enclosing plate to drive the screw rod to stretch the spring; A limiting pin, which is inserted into the spring from the fixed cylinder to lock the stretching state of the spring after the spring is stretched.

[0005] The beneficial effects of the technical scheme of the present application are that the spring is installed through the fixing cylinder, the stretching end of the spring is connected with the screw rod and the pulling block, the inner cavity of the sleeve is used as the stretching cavity, the sleeve is sleeved on the fixing cylinder, the rotation of the nut is converted into the linear movement of the screw rod to realize the stretching of the spring.

[0006] Preferably, the stretching part further comprises a pressure bearing which is detachably connected to the side plate surface of the sealing plate away from the inner cavity of the sleeve; the end of the screw rod away from the pulling block penetrates the inner ring of the pressure bearing; and the end surface of the nut rotationally abuts against the end surface of the inner ring of the pressure bearing. The pressure bearing reduces the frictional resistance when the nut rotates, facilitates the linear movement of the screw rod, and reduces the stretching resistance of the spring.

[0007] Preferably, the fixing cylinder comprises two semicircular tubes and a hanging plate; the hanging plate is fixed to the outer walls of the two semicircular tubes; and the two semicircular tubes are buckled to each other and the corresponding hanging plates are fastened by bolts. The design of the fixing cylinder in two halves facilitates the installation of the spring in the fixing cylinder and the assembly of the mechanism.

[0008] Preferably, the outer wall of the sleeve corresponding to the opening end is provided with a slot opening for hanging the hanging plate. The slot opening and the hanging plate are hung to realize the clamping between the sleeve and the fixing cylinder, preventing the sleeve from rotating relative to the fixing cylinder during the stretching of the spring.

[0009] Preferably, the locking rod is further provided; one end of each of the two semicircular tubes is fixed with a semicircular plate to form the closed end of the fixing cylinder; the locking rod penetrates the semicircular plate, and one end of the locking rod is fixed to the end of the spring away from the hanging plate, and the other end of the locking rod is fastened to the semicircular plate by a locking nut. The locking rod is used to realize the bolting of the fixed end of the spring and the closed end of the fixing cylinder.

[0010] Preferably, the outer walls of the two semicircular tubes corresponding to the open end of the fixing cylinder are provided with limiting holes communicating with each other, the limiting pin can penetrate the limiting holes and be inserted into the spring, and the limiting pin is located on the side of the hanging plate corresponding to the closed end. When the stretching of the spring is completed, the limiting rod can be inserted into the spring through the limiting hole to realize the mechanical locking of the stretched state of the spring.

[0011] Preferably, the outer wall of the sleeve corresponding to one side of the opening end is provided with a limiting slot, and the limiting hole is correspondingly arranged in the limiting slot. The limiting slot is provided to ensure that the limiting pin can lock the spring after the stretching of the spring is completed.

[0012] Preferably, the slot opening is L-shaped, and after the sleeve is sleeved on the fixing cylinder, the slot opening can be hung and locked with the hanging plate by rotating the sleeve.

[0013] Preferably, the number of the hanging plates is multiple, and the multiple hanging plates are arranged along the axial direction of the semi-circular tube.

[0014] The application further discloses a method for using the large-load spring stretching assembly tool. S1, connecting the pulling block and the hanging plate at one end of the spring through a pin shaft, and connecting the other end of the spring with a locking rod; S2, installing the spring in the fixed cylinder, fastening the hanging plates on the two semi-circular tubes in the fixed cylinder through bolts, and locking the locking rod and the closed end of the fixed cylinder through a locking nut S3, sleeving the sleeve on the fixed cylinder, rotating the sleeve to lock the notch and the hanging plate, and passing the screw rod through the sealing plate from the inner cavity of the sleeve; S4, installing the pressure bearing and the nut, and rotating the nut to move the screw rod and stretch the spring; S5, after the spring is stretched to the position, inserting the limiting pin into the spring from the fixed cylinder, and disassembling the sleeve, the nut, the pressure bearing and the screw rod; S6, installing the spring in the stretched state to the designed position of the mechanism, disassembling the limiting pin, and retracting the spring to the working state, thereby completing the assembly.

[0015] According to the technical scheme, compared with the prior art, the application provides a large-load spring stretching assembly tool and a method for using the same, the sleeve is used to lock the fixed cylinder and the limiting pin after stretching the spring, and the double protection of mechanical locking is achieved, even if the screw rod or the spring is broken, the tool ejection and the spring rebound can be effectively prevented, and the safety of the operator is greatly ensured; the spring is stretched by using the nut and the pressure bearing, the operation is labor-saving, the stretching process is stable and controllable, and the assembly efficiency is high; the split design facilitates installation and disassembly, is universal, reduces the requirement for the skill of the operator, and solves the problems of difficult stretching and extremely labor-consuming of the large-load spring during assembly. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical scheme in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the provided drawings.

[0017] Figure 1 The stretching assembly working explosion schematic diagram provided by the application is shown in the figure; Figure 2 The spring installation in the stretching assembly tool provided by the application is shown in the figure; Figure 3 The locking state schematic diagram of the stretched spring provided by the application is shown in the figure; Figure 4 The spring to be installed schematic diagram provided by the present application.

[0018] wherein, DETAILED DESCRIPTION The technical solutions in the embodiments of the present application will be apparently and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0019] As Figure 1 As shown in FIGS. 1 to 4, the large-load spring stretching assembly tool according to the embodiments of the present application solves the problems of stretching difficulty and extremely laboriousness of large-load springs in the assembly process, eliminates the safety risks such as tool slipping and spring sudden ejection caused by manual direct stretching of the spring, provides a standardized operation method with anti-rebound safety protection, improves the efficiency and safety of spring assembly, and includes a fixed cylinder 1, a sleeve 2, a stretching part 3, and a limiting pin 6. The fixed cylinder 1 is closed at one end and open at the other end. The inner cavity of the fixed cylinder 1 is used for placing a spring 4, and the fixed end of the spring 4 is bolted with the closed end of the fixed cylinder 1, and the stretching end is fixed with a spring hanging plate 41. The sleeve 2 is open at one end and can be clamped with the open end of the fixed cylinder 1, and the other end is fixed with a sealing plate 23. The inner cavity of the sleeve 2 is a stretching cavity, which ensures that the spring 4 has sufficient stretching length. The open end of the sleeve 2 is sleeved on the open end of the fixed cylinder 1, and the two are clamped and locked with each other. The stretching part 3 includes a screw rod 31, a pulling block 32, and a nut 35. The pulling block 32 is fixed at one end of the screw rod 31 and can be fastened with the spring hanging plate 41 through a pin shaft 33. The other end of the screw rod 31 extends into the inner cavity of the sleeve 2 and penetrates through the sealing plate 23. The nut 35 is located outside the sleeve 2 and is screwed on the screw rod 31, and the end face thereof is in rotational abutment with the plate face of the sealing plate 23 to drive the screw rod 31 to stretch the spring 4. After the spring 4 is stretched, the limiting pin 6 is inserted into the spring 4 from the fixed cylinder 1 to mechanically lock the stretching state of the spring 4.

[0020] In order to further optimize the above technical scheme, reduce the frictional resistance in the rotation process of the nut 35, and improve the stretching efficiency of the spring 4, the stretching part 3 further comprises a pressure bearing 34, the pressure bearing 34 is detachably connected to the plate surface of the sealing plate 23 away from the inner cavity of the sleeve 2; the end of the screw rod 31 away from the pull block 32 penetrates the inner ring of the pressure bearing 34; and the end surface of the nut 35 is in rotational abutment with the end surface of the inner ring of the pressure bearing 34. In specific installation, the inner ring of the pressure bearing 34 is sleeved on the screw rod 31 and is in abutment with the plate surface of the sealing plate 23, the nut 35 is screwed on the screw rod 31, and the end surface of the nut 35 is in abutment with the other end surface of the pressure bearing 34. By rotating the nut 35, the pressure bearing 34 is pressed against the sealing plate 23, and the nut 35 is in rotational abutment with the inner ring of the pressure bearing 34. By utilizing the self-characteristics of the pressure bearing 34, the frictional resistance in the rotation process of the nut 35 relative to the sealing plate 23 is reduced, and the stretching efficiency of the spring 4 is improved.

[0021] In the embodiment, the fixed cylinder 1 comprises two semicircular tubes 11 and a hanging plate 12. The two semicircular tubes 11 are fixed to the outer walls of the two semicircular tubes 11. The two semicircular tubes 11 are buckled to each other, and the corresponding hanging plates 12 are fastened by bolts. The fixed cylinder 1 is connected to the spring 4 by the two semicircular tubes 11, which are buckled to each other and fastened by bolts. The fixed cylinder 1 is connected to the spring 4 by the two semicircular tubes 11, which are buckled to each other and fastened by bolts.

[0022] In order to further optimize the above technical scheme, the spring 4 is conveniently bolted to the closed end of the fixed cylinder 1, and further comprises a locking rod 5. One end of each of the two semicircular tubes 11 is fixed with a semicircular plate 13, and the two semicircular plates 13 are buckled to each other to form the closed end of the fixed cylinder 1. The opposite end surfaces of the two semicircular plates 13 are provided with semicircular grooves, and the semicircular grooves are buckled to each other to form a circular hole. The locking rod 5 penetrates the circular hole on the semicircular plate 13, and one end of the locking rod 5 is fixed to the end of the spring 4 away from the hanging plate 41. The locking rod 5 is bolted to the spring 4 through the connecting plate, and the other end of the locking rod 5 is fastened to the semicircular plate 13 by a locking nut. The fixed end of the spring 4 is bolted to the closed end of the fixed cylinder 1 by the locking rod 5 penetrating the closed end and cooperating with the locking nut. In the stretching process, one end of the spring 4 is fixed, and the other end is stretched towards the inner cavity of the sleeve 2.

[0023] In some specific embodiments, in order to facilitate the limiting pin 6 to mechanically lock the stretching state of the spring 4, as shown in Figure 2 the two semicircular tubes 11 are provided with limiting holes corresponding to the outer walls of the open ends of the fixed cylinder 1. The limiting pin 6 can penetrate the limiting holes and be inserted into the spring 4, and the limiting pin 6 is located on the side of the hanging plate 41 corresponding to the closed end.

[0024] In order to further optimize the above technical scheme, after the spring 4 is stretched to the position, the limiting pin 6 can be observed to be inserted into the limiting hole, and the outer wall of the sleeve 2 corresponding to the side of the opening end is provided with a limiting groove 22, and the limiting hole is located in the limiting groove 22.

[0025] In the embodiment, the sleeve 2 is provided with a slot 21 for hanging the hanging plate 12 on the outer wall of the open end. The slot 21 is L-shaped, and after the sleeve 2 is sleeved on the fixed cylinder 1, the slot 21 can be locked with the hanging plate 12 by rotating the sleeve 2.

[0026] In other embodiments, in order to meet the stretching requirements of springs of different lengths in a free state, the number of hanging plates 12 is multiple, and the multiple hanging plates 12 are arranged along the axial direction of the semicircular pipe 11.

[0027] The embodiment also discloses a use method of the large-load spring stretching assembly tool. S1, connecting the pulling block 32 and the spring hanging plate 41 at one end of the spring 4 through the pin shaft 33, and connecting the locking rod 5 to the other end of the spring 4; S2, covering the two semicircular pipes 11 on the outer periphery of the spring 4, fastening the hanging plates 12 on the two semicircular pipes 11 through bolts, and locking the locking rod 5 and the closed end of the fixed cylinder 1 through the locking nut S3, sleeving the sleeve 2 on the fixed cylinder 1, rotating the sleeve 2 to lock the slot 21 and the hanging plate 12, and passing the screw rod 31 through the closing plate 23 in the inner cavity of the sleeve 2; S4, installing the pressure bearing 34 and the nut 35, and rotating the nut 35 to move the screw rod 31 and stretch the spring 4; S5, after the spring 4 is stretched to the position, inserting the limiting pin 6 into the spring 4 from the fixed cylinder 1, and disassembling the sleeve 2, the nut 35, the pressure bearing 34 and the screw rod 31; S6, installing the spring 4 in the stretched state to the designed position of the mechanism, disassembling the limiting pin 6, and retracting the spring 4 to the working state, thereby completing the assembly.

[0028] In the description, each embodiment is described in a progressive manner, and each embodiment mainly describes the difference from other embodiments. The same or similar parts of each embodiment can be referred to each other. For the device disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple, and the related parts can be referred to the method part.

[0029] The above description of the disclosed embodiments enables a person skilled in the art to implement or use the present application. Various modifications of the embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A high-load spring tension assembly fixture, characterized in that, include: A fixed cylinder (1) is closed at one end and open at the other end; the inner cavity of the fixed cylinder (1) is used to place a spring (4) and the fixed end of the spring (4) is bolted to the closed end of the fixed cylinder (1), and a hanging spring plate (41) is fixed at the tension end. Sleeve (2), one end of which is open and can be engaged with the open end of the fixed cylinder (1), and the other end is fixed with a sealing plate (23). The tensioning part (3) includes a screw (31), a pull block (32), and a nut (35); the pull block (32) is fixed to one end of the screw (31) and can be fastened to the spring plate (41) by a pin (33); the other end of the screw (31) extends into the inner cavity of the sleeve (2) and passes through the sealing plate (23); the nut (35) is located outside the sleeve (2) and screwed onto the screw (31), and its end face rotates and abuts against the plate surface of the sealing plate (23) to drive the screw (31) to stretch the spring (4); The limiting pin (6) is inserted into the spring (4) from the fixed cylinder (1) after the spring (4) is stretched to lock the stretched state of the spring (4).

2. The high-load spring tension assembly fixture according to claim 1, characterized in that, The tensioning part (3) also includes a pressure bearing (34), which is detachably connected to the side plate of the sealing plate (23) away from the inner cavity of the sleeve (2); the end of the screw (31) away from the pull block (32) passes through the inner ring of the pressure bearing (34); the end face of the nut (35) rotatably abuts against the end face of the inner ring of the pressure bearing (34).

3. The high-load spring tension assembly fixture according to claim 1, characterized in that, The fixed cylinder (1) includes a semi-circular tube (11) and a hanging plate (12); there are two semi-circular tubes (11), and the hanging plate (12) is fixed on the outer wall of the two semi-circular tubes (11); the two semi-circular tubes (11) are interlocked and their corresponding hanging plates (12) are fastened by bolts.

4. The high-load spring tension assembly fixture according to claim 3, characterized in that, The sleeve (2) has a slot (21) on its outer wall corresponding to its open end, which can be used to hang the hanging plate (12).

5. The high-load spring tension assembly fixture according to claim 3, characterized in that, It also includes a locking rod (5); one end of each of the two semicircular tubes (11) is fixed with a semicircular plate (13) to form the closed end of the fixed cylinder (1); the locking rod (5) passes through the semicircular plate (13), and one end of it is fixed to the end of the spring (4) away from the hanging spring plate (41), and the other end is fastened to the semicircular plate (13) by a locking nut.

6. The high-load spring tension assembly fixture according to claim 5, characterized in that, The two semi-circular tubes (11) have interconnected limiting holes on the outer wall of the open end of the fixed cylinder (1). The limiting pin (6) can pass through the limiting hole and be inserted into the spring (4), and the limiting pin (6) is located on the side of the hanging spring plate (41) corresponding to the closed end.

7. The high-load spring tension assembly fixture according to claim 6, characterized in that, The sleeve (2) has a limiting groove (22) on the outer wall of one side of its opening end, and the limiting hole is located in the limiting groove (22).

8. The high-load spring tension assembly fixture according to claim 4, characterized in that, The slot (21) is L-shaped. After the sleeve (2) is fitted onto the fixed cylinder (1), the slot (21) can be locked to the hanging plate (12) by rotating the sleeve (2).

9. A high-load spring tension assembly fixture according to claim 8, characterized in that, The number of the hanging plates (12) is multiple, and the multiple hanging plates (12) are arranged along the axial direction of the semi-circular tube (11).

10. A method of using the high-load spring tension assembly fixture according to any one of claims 1 to 9, characterized in that, Includes the following steps: S1. Connect the pull block (32) to the hanging spring plate (41) at one end of the spring (4) through the pin (33), and connect the locking rod (5) to the other end of the spring (4); S2, the spring (4) is installed inside the fixed cylinder (1), and the hanging plates (12) on the two semi-circular tubes (11) in the fixed cylinder (1) are fastened by bolts; the locking rod (5) is locked to the closed end of the fixed cylinder (1) by a locking nut. S3. Sleeve (2) is fitted onto fixed sleeve (1), and sleeve (2) is rotated to lock the groove (21) with the hanging plate (12); screw (31) passes through sealing plate (23) from the inner cavity of sleeve (2). S4. Install the pressure bearing (34) and nut (35), rotate the nut (35) to move the screw (31) and stretch the spring (4); S5. After the spring (4) is stretched to the position, insert the limiting pin (6) into the spring (4) from the fixed cylinder (1) and remove the sleeve (2), nut (35), pressure bearing (34) and screw (31). S6. The spring (4) is installed in the designed position of the mechanism in the stretched state. The limit pin (6) is removed and the spring (4) is retracted to the working state to complete the assembly.

Images