Dual-purpose tool for tension spring stretching and compression spring compression

Abstract

The dual-purpose tool comprises a base, supporting plates are symmetrically arranged on the base, operating rods are hinged to the tops of the symmetrical supporting plates, and lug plates at the two ends of the tension spring are hinged to the operating rods and the base; a support hinged to one end of the connecting rod is arranged on the base, and a pressing rod head movably sleeved with the connecting rod is hinged to the operating rod. A distance plate of a U-shaped structure is arranged between the lug plates on the pulled tension spring in a sleeved mode. The distance plate comprises a bottom plate and arc-shaped side plates hinged to the two sides of the bottom plate, and torsional springs for driving the arc-shaped side plates to be pressed and attached to the tension springs are arranged at the hinged positions of the arc-shaped side plates and the bottom plate. And a through hole for prearranging a pin is formed in the pressing rod head. According to the dual-purpose tool, stretching of the tension spring and compression operation of the compression spring can be achieved, the problems that at present, manual operation is large in difficulty and large potential safety hazards exist are solved, and smooth assembling operation of the tension spring and the compression spring in a circuit breaker is facilitated.

Description

Technical Field

[0001] The present application relates to the technical field of the stretching of a tension spring and the compression of a compression spring in a circuit breaker, and particularly relates to a two-purpose tool for stretching a tension spring and compressing a compression spring. Background Art

[0002] In the high-voltage switch industry, the closing spring of a circuit breaker mechanism generally adopts a spiral tension spring, and the opening spring adopts a spiral compression spring, which is designed according to the mechanism of the circuit breaker. Because springs all have pre-tension and pre-pressure, in the normal state, the tension spring is in a contracted state, and when it is assembled into the circuit breaker, a certain stretching length is required to enable the holes of the ear plates at both ends of the tension spring to be correspondingly connected to the assembly positions in the circuit breaker.

[0003] Currently, when assembling the tension spring, the tension spring is stretched manually and then assembled. However, due to the large design specifications of the tension spring, its tensile force is usually thousands of Newtons. Therefore, when stretching manually, it is relatively difficult to install it on the mechanism transmission part. Without any tools, it is basically impossible to achieve. The closing tension spring needs to use equipment such as a spring dynamometer to pull the spring open, but since it is not a special tension spring tooling, the operation is very inconvenient, the efficiency is very low, and it is also not convenient to assemble the pulled-open tension spring into the circuit breaker.

[0004] Similarly, the opening compression spring is currently fixed by clamping and compressing it with a vise and then rotated and installed on the workpiece. This not only easily damages the surface of the spring, but also the spring is likely to hurt people if the operation is not careful, resulting in safety accidents. Summary of the Invention

[0005] In view of the above existing problems, the present application aims to provide a two-purpose tool for stretching a tension spring and compressing a compression spring, which can realize the stretching of the tension spring and the compression of the compression spring, solve the problems of large manual operation difficulty and great potential safety hazards at present, and facilitate the smooth assembly operation of the tension spring and the compression spring in the circuit breaker.

[0006] To achieve the above object, the technical solution adopted in the present application is as follows: A two-purpose tool for stretching a tension spring and compressing a compression spring, the two ends of the tension spring are provided with ear plates; the compression spring is sleeved on a connecting rod, and a pin of the compression spring in a compressed state is inserted through the connecting rod. It is characterized in that: the two-purpose tool includes a base, symmetrically arranged support plates are provided on the base, and operating rods are hinged on the tops of the symmetric support plates. The ear plates at both ends of the tension spring are hinged to the operating rods and the base; a support is provided on the base and is hinged to one end of the connecting rod, and a pressing rod head that is movably sleeved on the connecting rod is hinged on the operating rod.

[0007] Preferably, a U-shaped fixed-distance plate is sleeved between the ear plates on the pulled-open tension spring.

[0008] Preferably, the distance - fixing plate includes a bottom plate, and arc - shaped side plates hinged to both sides of the bottom plate, and a torsion spring is arranged at the hinge of the arc - shaped side plate and the bottom plate to drive the arc - shaped side plate to press against the tension spring.

[0009] Preferably, a perforation for pre - setting a pin is formed on the pressing rod head, and the inner side of the perforation is arranged as an arc - shaped surface structure.

[0010] The beneficial effect of this application is that the stretching of the tension spring and the compression of the compression spring can be realized through this dual - purpose tooling, solving the problems of difficult manual operation and great potential safety hazards at present, and facilitating the smooth assembly operation of the tension spring and the compression spring in the circuit breaker. Description of the Drawings

[0011] Figure 1 Illustrations of the normal state and the stretched state of the tension spring (the left side is the normal state, and the right side is the stretched state).

[0012] Figure 2 Illustrations of the normal state of the compression spring and the compressed state sleeved on the connecting rod (the left side is the normal state, and the right side is the stretched state).

[0013] Figure 3 Illustration of the structure of the dual - purpose tooling of this application.

[0014] Figure 4 Illustration of the stretching of the tension spring and the compression of the compression spring by the dual - purpose tooling of this application.

[0015] Figure 5 Illustration of the distance - fixing plate sleeved after the tension spring of this application is stretched (the left side is the front view, and the right side is the top view).

[0016] Figure 6 This application Figure 5 Illustration of the skewed and dropped sleeved distance - fixing plate.

[0017] Figure 7 Illustration of the structure of the distance - fixing plate that can be hinged and opened of this application (the left side is the distance - fixing plate sleeved with the tension spring, and the right side is the illustration after sleeving).

[0018] Figure 8 Illustration of the pin passing through the pressing rod head of this application.

[0019] Figure 9 Illustration of the pin being sleeved in the pin hole and the pressing rod head being separated from the pin after the compression spring of this application is compressed.

[0020] In the figure: 7 - tension spring; 71 - ear plate; 8 - compression spring; 9 - connecting rod; 10 - pin. Detailed Description of the Invention

[0021] To enable those of ordinary skill in the art to better understand the technical solution of this application, the technical solution of this application will be further described below in conjunction with the accompanying drawings and embodiments.

[0022] Referring to Figures 1 to 9 A two-purpose tool for stretching a tension spring and compressing a compression spring as shown, such as Figures 1 - 2 shown, the two ends of the tension spring have ear plates; the compression spring is sleeved on the connecting rod, and a pin for the compression state of the compression spring is inserted through the connecting rod. After compressing the compression spring on the connecting rod, one end of the compression spring is lower than the pin hole on the connecting rod, and then a pin is inserted into the pin hole to limit the compression of the compression spring.

[0023] To solve the problem that it is difficult to smoothly stretch and compress the current tension spring and compression spring, this application is provided with a two-purpose tool, such as Figures 3 - 4 shown. The two-purpose tool includes a base 1, symmetric support plates 2 are arranged on the base 1, and an operating rod 3 is hinged at the top of the symmetric support plates 2. The ear plates at both ends of the tension spring are hingedly connected to the operating rod 3 and the base 1, such as Figure 4 shown. Driving the operating rod 3 downward to pull the tension spring apart and pulling the tension spring to an appropriate length (the length for assembling into a circuit breaker).

[0024] Such as Figures 3 - 4 shown, a support 4 hinged to one end of the connecting rod is arranged on the base 1, and a pressure rod head 5 movably sleeved on the connecting rod is hinged on the operating rod 3. One end of the connecting rod is hinged to the support 4, the compression spring is sleeved on the connecting rod, and then the pressure rod head 5 is sleeved on the top end of the connecting rod and contacts the compression spring, such as Figure 4 shown. When driving the operating rod 3 downward, the pressure rod head 5 compresses the compression spring sleeved on the connecting rod until the top end of the compression spring is lower than the height of the pin hole on the connecting rod. A pin is inserted into the pin hole to limit the compression of the compressed compression spring, and the compressed compression spring and the connecting rod can be assembled into the circuit breaker synchronously.

[0025] Therefore, through this two-purpose tool, the stretching of the tension spring and the compression of the compression spring can be realized, solving the problems of difficult manual operation and large potential safety hazards at present, and facilitating the smooth assembly operation of the tension spring and the compression spring in the circuit breaker.

[0026] After the above-mentioned tension spring is pulled apart, it is necessary to disassemble the tension spring from the tool and assemble it into the circuit breaker. After disassembly, the tension spring will contract and reset. Therefore, to solve this problem, such as Figure 5 shown, a fixed-distance plate 6 with a U-shaped structure is sleeved between the ear plates on the pulled-apart tension spring. After the tension spring is pulled to the designed length by the tool, the fixed-distance plate 6 is sleeved in from one side of the tension spring, and then the downward pressure on the operating rod 3 is withdrawn, so that the ear plates at both ends of the tension spring contact the fixed-distance plate 6, such as Figure 5As shown, the distance between the stretched extension springs is then fixed by the spacer plate 6, and the extension springs can be smoothly removed from the tooling and further assembled into the circuit breaker. After being installed, the operation of the circuit breaker will further stretch the extension springs. After the extension springs are further stretched, the spacer plate 6 can be smoothly removed from the extension springs.

[0027] When the spacer plate 6 is sleeved between the symmetrical ear plates to fix the distance of the stretched extension springs as described above, since the spacer plate 6 is manually sleeved on the extension springs, there may be a problem that the sleeving is not in place. And during the process of moving the extension springs with fixed distance to the circuit breaker for assembly, due to the large extrusion of the ear plates on both sides of the extension springs, there may be a problem that the spacer plate 6 and the extension springs are skewed and dropped, as Figure 6 shown. Then, after dropping, there will be a large potential safety hazard when the extension springs elastically retract. Therefore, to improve the stability of the spacer plate 6 sleeved on the extension springs, as Figure 7 shown, the spacer plate 6 includes a bottom plate 61 and arc-shaped side plates 62 hinged on both sides of the bottom plate 61, and a torsion spring (not shown in the figure) for driving the arc-shaped side plates 62 to press against the extension springs is provided at the hinge joint of the arc-shaped side plates 62 and the bottom plate 61. During operation, after the extension springs are pulled open by the above-mentioned tooling, the operator drives the arc-shaped side plates 62 on both sides of the spacer plate 6 to overcome the acting force of the torsion spring and open the opening of the spacer plate 6, as Figure 7 shown in the left drawing in the figure. Then, the spacer plate 6 is sleeved on the extension springs, and then the acting force on the arc-shaped side plates 62 is released, so that the arc-shaped side plates 62 are pressed against the side walls of the extension springs under the drive of the torsion spring, and further the outer wall of the extension springs is covered by the arc-shaped structure of the arc-shaped side plates 62, thereby improving the stability of the spacer plate 6 sleeved on the extension springs and avoiding the problem of large potential safety hazards caused by the skewing and dropping of the spacer plate 6.

[0028] After the extension springs are assembled into the circuit breaker, the circuit breaker drives the extension springs to stretch again. After the operator drives the arc-shaped side plates 62 on both sides and overcomes the acting force of the torsion spring, the spacer plate 6 can be smoothly disassembled.

[0029] Similarly, to facilitate the safe insertion of the pin after the compression spring is compressed, as Figures 8 - 9 shown, a perforation 5a for pre-setting the pin is provided on the pressure rod head 5, and the inner side of the perforation 5a is set as an arc-shaped surface structure. The operation process is as Figure 8 shown. First, one end of the pin is inserted into the perforation 5a on one side wall of the pressure rod head 5. Then, the compression spring is pressed down. After the compression spring is lower than the pin hole on the connecting rod, the pin is pushed to be inserted into the pin hole. Since the perforation 5a is an arc-shaped surface structure, as Figure 9 shown, the pin can be separated from the perforation 5a, and then the pressure rod head 5 is lifted to complete the insertion of the pin. Compared with manually directly holding the pin and inserting it into the pin hole of the connecting rod, it can avoid the safety problem of the compression spring rebounding and contacting and squeezing the pin.

[0030] The principle of this application is as follows: When using this dual-purpose tooling for the stretching of extension springs and the compression of compression springs, the ear plates at both ends of the extension spring are hinged to the operating rod 3 and the base 1. The operating rod 3 is driven downward to stretch the extension spring. After the extension spring is stretched to an appropriate length (the length for assembly into the circuit breaker), the operator drives the arc-shaped side plates 62 on both sides of the fixed-distance plate 6 to overcome the acting force of the torsion spring, open the opening of the fixed-distance plate 6, and then sleeved the fixed-distance plate 6 on the extension spring. Then, the acting force on the arc-shaped side plates 62 is released, so that the arc-shaped side plates 62 are pressed against the side wall of the extension spring under the drive of the torsion spring, and further the outer wall of the extension spring is covered by the arc-shaped structure of the arc-shaped side plates 62, thereby improving the stability of the fixed-distance plate 6 sleeved on the extension spring. After the extension spring is assembled into the circuit breaker, the circuit breaker drives the extension spring to stretch again. After the operator drives the arc-shaped side plates 62 on both sides and overcomes the acting force of the torsion spring, the fixed-distance plate 6 can be smoothly disassembled.

[0031] When performing the compression operation of the compression spring, one end of the connecting rod is hinged to the support 4, the compression spring is sleeved on the connecting rod, then the pressure rod head 5 is sleeved on the top end of the connecting rod and contacts the compression spring. When the operating rod is driven downward, the pressure rod head 5 compresses the compression spring sleeved on the connecting rod until the top end of the compression spring is lower than the height of the pin hole on the connecting rod, and the push pin is inserted into the pin hole. The pin can then disengage from the through hole 5a, thereby moving the pressure rod head 5 upward to complete the insertion of the pin, that is, completing the compression of the compression spring.

[0032] The above shows and describes the basic principle, main features and advantages of this application. Without departing from the spirit and scope of this application, this application will have various changes and improvements, and these changes and improvements all fall within the scope of this application claimed.

Claims

1. A dual-purpose tool for stretching a tension spring and compressing a compression spring. The two ends of the tension spring have ear plates. The compression spring is sleeved on a connecting rod, and a pin for the compression spring in a compressed state is inserted through the connecting rod. It is characterized in that: The dual-purpose tooling includes a base (1), on which support plates (2) are symmetrically arranged, and an operating rod (3) is hinged at the top of the symmetric support plates (2). The ear plates at both ends of the tension spring are hinged to the operating rod (3) and the base (1). A support (4) hinged to one end of a connecting rod is arranged on the base (1), and a pressure rod head (5) movably sleeved with the connecting rod is hinged on the operating rod (3).

2. The dual-purpose tooling according to claim 1, wherein: A fixed-distance plate (6) with a U-shaped structure is sleeved between the ear plates on the tension spring that is pulled open.

3. The dual-purpose tooling according to claim 2, wherein: The fixed-distance plate (6) includes a bottom plate (61), and arc-shaped side plates (62) hinged to both sides of the bottom plate (61). A torsion spring for driving the arc-shaped side plates (62) to press against the tension spring is arranged at the hinge of the arc-shaped side plates (62) and the bottom plate (61).

4. The dual-purpose tooling according to claim 3, characterized in that: A perforation (5a) for pre-setting a pin is formed on the pressure rod head (5), and the inner side of the perforation (5a) is arranged as an arc-shaped surface structure.

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