Contact spring assembly and arc extinguish chamber

Abstract

The utility model relates to the technical field of high-voltage vacuum switch assembly design, in particular to a contact spring assembly and an arc extinguish chamber, which comprise a contact spring pressure rod connecting plate, a first connecting assembly, a contact spring, a contact spring rod, a contact spring seat, a contact spring positioning sleeve, a contact spring connecting rod and a second connecting assembly, when the contact spring assembly is pre-compressed, the contact spring rod, the contact spring compression rod connecting plate, the contact spring, the contact spring seat and the first connecting assembly can be assembled. The first connecting assembly is adjusted, so that the contact spring reaches a preset pre-compression state; the contact spring connecting rod is installed, the contact spring pressing rod connecting plate is detached and turned over, the contact spring connecting rod is installed and fixed in cooperation with the contact spring base and the second connecting assembly, installation of the whole contact spring assembly is completed, installation is easy, adjustment is flexible, and the manufacturing cost is low. The problems that in the prior art, due to the fact that a specific tool needs to be used in the process that the contact spring reaches the pre-compression position, working procedures are complex, and economical efficiency is poor are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of high-voltage vacuum switch assembly design, in particular to a contact spring component and an arc extinguishing chamber. Background Art

[0002] The vacuum interrupter, a key component in a circuit breaker that extinguishes arcs, works in conjunction with the operating mechanism to provide interrupting capability, transitioning a point in the power grid from a current-conducting state to a current-disconnecting state. Closing bounce occurs when the moving contact, while closing at a reasonable speed, elastically collides with the stationary contact during the closing process of the vacuum interrupter, causing contact pressure to shift again. This repetitive bounce process, which occurs when the contacts remain in the closed position, causes the moving contact to repeatedly bounce.

[0003] Therefore, in high-voltage vacuum switches, a certain contact pressure must be applied between the moving and static contacts to prevent the switch from tripping due to the electromotive force generated by the current. The force pressing against the contacts at the beginning of the closing process is called the contact preload, before overtravel begins. Once overtravel is complete, the force applied to the contacts is called the rated contact pressure. Furthermore, the contact pressure varies depending on the capacity and breaking capacity of the vacuum switch, so a contact spring must be incorporated into the design of the vacuum switch.

[0004] The contact spring is a key component of the vacuum circuit breaker. It is a contact retaining spring for high-voltage vacuum switches. It enables the spring guide rod to move up and down to provide stable contact pressure for the moving and static contacts of the high-voltage vacuum switch, ensuring that the circuit resistance meets the current and temperature rise requirements. It can also improve the contact collision and bounce problems that occur during the closing process of the circuit breaker, and at the same time increase the opening speed during the opening process. Before the contact spring is assembled to the vacuum switch, the compression spring needs to be compressed to the designed position and then fixed by a cylindrical pin. During the positioning process, the energy generated by the designed position of the compression spring is relatively large, so it is necessary to design special tooling to complete it. For example, the Chinese invention with publication number CN109616352A discloses a contact spring rapid pre-stressing device, comprising: a base; a contact seat bracket and a cam bracket on the base are arranged at intervals along the axial direction of the base; a card hole is provided on the contact seat bracket for clamping the upper contact spring seat in the contact spring assembly; an eccentric shaft is provided on the cam bracket, and an operating handle is provided on the cam; a guide bar slidably arranged on the base, and an axle pin is fixed on the guide bar, and the first end of the axle pin is in contact with the cam circumferential surface of the cam; a guide rod hole is provided in the second end of the axle pin. The present invention can be applied to a quick pre-compression device for compression springs, effectively resolving assembly methods that cannot be achieved by ordinary manual force. By using the principle of levers and cams, different stroke changes can be achieved by adjusting different cams, thereby realizing a compression design for the compression spring at any position. The structural adjustment is simple and reliable, and the implementation scheme is highly economical. However, the use of such a special pre-compression tool is generally applicable to the pre-compression of large quantities of the same type of compression springs. After the compression of the compression spring is completed, the special tooling must be removed before it can be assembled into the vacuum switch. The process is complicated and, because the special tooling cannot be applied to other products, it not only results in a waste of process but also in a waste of cost, resulting in poor economic efficiency. Utility Model Content

[0005] Aiming at the problem in the prior art that a specific tool is required in the process of a contact spring reaching a pre-compression position, resulting in a complicated process and poor economy, the utility model provides a contact spring assembly and an arc extinguishing chamber.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0007] The utility model provides a contact spring assembly, comprising a contact spring pressure rod connecting plate, a first connecting assembly, a contact spring, a contact spring rod, a contact spring seat, a contact spring positioning sleeve, a contact spring connecting rod and a second connecting assembly;

[0008] The contact spring rod is provided with a first shoulder at one end and a first pin hole at the other end; the contact spring positioning sleeve is provided with a second pin hole; the contact spring connecting rod is provided with a second shoulder;

[0009] Before pre-compression of the contact spring assembly: the end of the first shoulder abuts against the contact spring pressure rod connecting plate; the contact spring and the contact spring seat are sleeved on the contact spring rod, and the contact spring is located between the contact spring seat and the first shoulder; the contact spring seat and the contact spring pressure rod connecting plate are detachably connected via the first connecting assembly;

[0010] After the contact spring assembly is assembled: the contact spring and the contact spring seat are sleeved on the contact spring rod, and the contact spring is located between the contact spring seat and the first shoulder; the contact spring positioning sleeve is sleeved on the end of the contact spring rod provided with a first pin hole, the first pin hole corresponds one to one with the second pin hole, and is fixed by a pin; the contact spring connecting rod is sleeved on the outside of the contact spring positioning sleeve, and the second shoulder is located between the contact spring pressure rod connecting plate and the contact spring seat, and the contact spring pressure rod connecting plate and the contact spring seat are connected through a second connecting assembly to press the second shoulder.

[0011] Furthermore, a through hole is provided on the contact spring pressure rod connecting plate, and a threaded hole is provided on the contact spring seat. The first connecting component is a first bolt, and the second connecting component is a second bolt. Before pre-compression of the contact spring assembly, the first bolt passes through the through hole and the threaded hole in sequence to connect the contact spring pressure rod connecting plate and the contact spring seat. After the contact spring assembly is assembled, the second bolt passes through the through hole and the threaded hole in sequence to tighten the second shoulder.

[0012] Furthermore, the contact spring pressure rod connecting plate is provided with a third shoulder. Before the contact spring assembly is pre-compressed, the first shoulder abuts against the third shoulder; after the contact spring assembly is assembled, the second shoulder abuts against the third shoulder and is located between the third shoulder and the contact spring seat.

[0013] Preferably, a limiting groove is provided on the side of the contact spring seat that contacts the contact spring.

[0014] Preferably, a boss is provided on one side of the contact spring seat close to the contact spring connecting rod, and the boss has a diameter larger than the small end diameter of the contact spring positioning sleeve and smaller than or equal to the inner diameter of the contact spring connecting rod.

[0015] Preferably, one end of the contact spring rod provided with the first shoulder is connected to the first externally threaded rod.

[0016] Preferably, the end of the contact spring rod provided with the first shoulder is provided with a first internal threaded hole.

[0017] Preferably, a second internal threaded hole is provided at the end of the contact spring connecting rod.

[0018] Preferably, a second externally threaded rod is provided at the end of the contact spring connecting rod.

[0019] The utility model also provides an arc extinguishing chamber, comprising the contact spring assembly.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] The utility model discloses a contact spring assembly, which is provided with a contact spring pressure rod connecting plate, a first connecting assembly, a contact spring, a contact spring rod, a contact spring seat, a contact spring positioning sleeve, a contact spring connecting rod and a second connecting assembly; when the contact spring assembly is pre-compressed, the contact spring rod, the contact spring pressure rod connecting plate, the contact spring, the contact spring seat and the first connecting assembly can be assembled and connected; by adjusting the distance between the contact spring pressure rod connecting plate and the contact spring seat, the contact spring is pre-compressed to reach a preset pre-compression state, and the contact spring positioning sleeve is put onto the contact spring rod and positioned and fixed by the cooperation of the pin and the pin hole; then, the contact spring connecting rod is installed, and the contact spring pressure rod is connected to the contact spring pressure rod. The connecting plate is removed and flipped over to cooperate with the contact spring seat and the second connecting assembly to install and fix the contact spring connecting rod, thereby completing the installation of the entire contact spring assembly; the entire pre-compression assembly installation process does not require special pre-compression tools, and the contact spring assembly after installation can be directly installed in the arc extinguishing chamber for use. The pre-compression process of the contact spring can be completed only by the cooperation of various parts of the contact spring assembly. The entire contact spring assembly is simple to install and flexible to adjust, with low cost and no waste. If the product needs maintenance after leaving the factory, there is no need to carry special tooling. It is convenient and quick, and is especially suitable for use in situations where conditions are simple, relevant special tooling is not available on site, but emergency repairs are needed.

[0022] By arranging a through hole on the contact spring pressure rod connecting plate and a threaded hole on the contact spring seat, the first bolt cooperates with the through hole and the threaded hole, so that the distance between the contact spring pressure rod connecting plate and the contact spring seat can be adjusted during the pre-compression process, thereby achieving pre-compression and fixation of the contact spring; and the contact spring connecting rod can be installed by cooperating with the second bolt, the through hole and the threaded hole. The structure is simple, easy to process and low in cost.

[0023] By arranging a third shoulder on the contact spring pressure rod connecting plate, it is possible to provide pre-tightening force for the contact spring pre-compression by abutting the first shoulder and the third shoulder before pre-compression of the contact spring assembly; after the contact spring assembly is assembled, the second shoulder is tightened by cooperating with the contact spring seat.

[0024] A limiting groove is provided on the side of the contact spring seat that contacts the contact spring, so as to facilitate limiting compression of the contact spring.

[0025] A boss is provided on one side of the contact spring seat close to the contact spring connecting rod. The boss diameter is larger than the small end diameter of the contact spring positioning sleeve and is less than or equal to the inner diameter of the contact spring connecting rod, so that the structure fits more tightly and the tightness is better after installation.

[0026] One end of the contact spring rod provided with the first shoulder is connected to the first external threaded rod or the first internal threaded hole, which is convenient for installation in the arc extinguishing chamber.

[0027] The end of the contact spring connecting rod is provided with a second internal threaded hole or a second external threaded rod, which is convenient for installation in the arc extinguishing chamber and has better versatility.

[0028] An arc extinguishing chamber comprises the above-mentioned contact spring assembly. The arc extinguishing chamber has a simple structure and is easy to repair and maintain. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of the structure of a contact spring assembly before pre-stressing in Example 1 of the present utility model.

[0030] Figure 2 This is a structural schematic diagram of a contact spring assembly after pre-stressing in Example 1 of the utility model.

[0031] Figure 3 This is a schematic structural diagram of a contact spring assembly after assembly in Example 1 of the utility model.

[0032] Figure 4 This is a partial structural diagram of the contact spring pressure rod connecting plate of the present utility model.

[0033] Figure 5 This is a structural diagram of the contact spring seat of the utility model.

[0034] Figure 6 This is a schematic structural diagram of a contact spring assembly after assembly in Example 2 of the utility model.

[0035] Among them, 1-contact spring pressure rod connecting plate, 2-first connecting component, 3-contact spring, 4-contact spring rod, 5-contact spring seat, 6-contact spring positioning sleeve, 7-pin, 8-contact spring connecting rod, 9-second connecting component, 10-first shoulder, 11-second shoulder, 12-first externally threaded rod, 13-first internally threaded hole, 14-third shoulder, 15-limiting groove, 16-boss, 17-second internally threaded hole, and 18-second externally threaded rod. DETAILED DESCRIPTION

[0036] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0037] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0038] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0039] In the description of the embodiments of the present invention, it should be noted that if the terms "upper," "lower," "horizontal," "inner," etc. appear to indicate an orientation or positional relationship, they are based on the orientation or positional relationship shown in the accompanying drawings, or are the orientation or positional relationship in which the product of the present invention is typically placed when in use. These terms are used solely to facilitate the description of the present invention and to simplify the description. They do not indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first," "second," etc. are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0040] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0041] In the description of the embodiments of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0042] The present invention will be further described in detail below with reference to specific embodiments, which are intended to explain rather than limit the present invention.

[0043] See also Figures 1 to 6 The utility model discloses a contact spring assembly, including a contact spring pressure rod connecting plate 1, a first connecting assembly 2, a contact spring 3, a contact spring rod 4, a contact spring seat 5, a contact spring positioning sleeve 6, a contact spring connecting rod 8 and a second connecting assembly 9;

[0044] The contact spring rod 4 is provided with a first shoulder 10 at one end and a first pin hole at the other end; the contact spring positioning sleeve 6 is provided with a second pin hole; the contact spring connecting rod 8 is provided with a second shoulder 11;

[0045] Before pre-compression of the contact spring assembly: the end of the first shoulder 10 abuts against the contact spring pressure rod connecting plate 1; the contact spring 3 and the contact spring seat 5 are sleeved on the contact spring rod 4, and the contact spring 3 is located between the contact spring seat 5 and the first shoulder 10; the contact spring seat 5 and the contact spring pressure rod connecting plate 1 are detachably connected via the first connecting assembly 2;

[0046] After the contact spring assembly is assembled: the contact spring 3 and the contact spring seat 5 are sleeved on the contact spring rod 4, and the contact spring 3 is located between the contact spring seat 5 and the shoulder; the contact spring positioning sleeve 6 is sleeved on one end of the contact spring rod 4 provided with a first pin hole, the first pin hole corresponds to the second pin hole one by one, and is fixed by a pin 7; the contact spring connecting rod 8 is sleeved on the outside of the contact spring positioning sleeve 6, and the second shoulder 11 is located between the contact spring pressure rod connecting plate 1 and the contact spring seat 5, and the contact spring pressure rod connecting plate 1 and the contact spring seat 5 are connected through the second connecting assembly 9, pressing the second shoulder 11.

[0047] Example 1

[0048] See also Figures 1 to 5 The utility model discloses a contact spring assembly, including a contact spring pressure rod connecting plate 1, a first connecting assembly 2, a contact spring 3, a contact spring rod 4, a contact spring seat 5, a contact spring positioning sleeve 6, a contact spring connecting rod 8 and a second connecting assembly 9;

[0049] A through hole is provided on the contact spring pressure rod connecting plate 1, and a third shoulder 14 is provided on the contact spring pressure rod connecting plate 1; a threaded hole is provided on the contact spring seat 5, and a limiting groove 15 is provided on the side of the contact spring seat 5 in contact with the contact spring 3; a boss 16 is provided on the side of the contact spring seat 5 close to the contact spring connecting rod 8, and the diameter of the boss 16 is larger than the small end diameter of the contact spring positioning sleeve 6 and less than or equal to the inner diameter of the contact spring connecting rod 8; a first shoulder 10 is provided at one end of the contact spring rod 4, and a first pin hole is provided at the other end; a first internal threaded hole 13 is provided at the end of the contact spring rod 4 provided with the first shoulder 10; a second pin hole is provided on the contact spring positioning sleeve 6; the contact spring connecting rod 8 is provided with a second shoulder 11, and a second internal threaded hole 17 is provided at the end of the contact spring connecting rod 8;

[0050] Before pre-compression of the contact spring assembly: the end of the first shoulder 10 abuts against the third shoulder 14; the contact spring 3 and the contact spring seat 5 are sleeved on the contact spring rod 4, with the contact spring 3 located between the contact spring seat 5 and the first shoulder 10; the first connecting component 2 is a first bolt, which passes through the through hole and the threaded hole in sequence to connect the contact spring pressure rod connecting plate 1 and the contact spring seat 5;

[0051] After the contact spring assembly is assembled, the contact spring 3 and contact spring seat 5 are sleeved onto the contact spring rod 4, with the contact spring 3 positioned between the contact spring seat 5 and the shoulder. The contact spring positioning sleeve 6 is sleeved onto the end of the contact spring rod 4 with the first pin hole. The first pin hole corresponds one-to-one with the second pin hole and is secured by a pin 7. The contact spring connecting rod 8 is sleeved onto the outside of the contact spring positioning sleeve 6, with the second shoulder 11 abutting against the third shoulder 14 and positioned between the third shoulder 14 and the contact spring seat 5. The second connecting component 9 is a second bolt, which passes through the through hole and the threaded hole in sequence to press against the second shoulder 11. The second bolt is shorter than the first bolt.

[0052] Example 2

[0053] See also Figures 4 to 6 The utility model discloses a contact spring assembly, including a contact spring pressure rod connecting plate 1, a first connecting assembly 2, a contact spring 3, a contact spring rod 4, a contact spring seat 5, a contact spring positioning sleeve 6, a contact spring connecting rod 8 and a second connecting assembly 9;

[0054] A through hole is provided on the contact spring pressure rod connecting plate 1, and the contact spring pressure rod connecting plate 1 is provided with a third shoulder 14; a threaded hole is provided on the contact spring seat 5, and a limiting groove 15 is provided on the side of the contact spring seat 5 in contact with the contact spring 3, and a boss 16 is provided on the side of the contact spring seat 5 close to the contact spring connecting rod 8, and the diameter of the boss 16 is larger than the small end diameter of the contact spring positioning sleeve 6 and less than or equal to the inner diameter of the contact spring connecting rod 8; one end of the contact spring rod 4 is provided with a first shoulder 10, and the other end is provided with a first pin hole, and the end of the contact spring rod 4 provided with the first shoulder 10 is provided with a first externally threaded rod 12; a second pin hole is provided on the contact spring positioning sleeve 6; the contact spring connecting rod 8 is provided with a second shoulder 11, and the end of the contact spring connecting rod 8 is provided with a second externally threaded rod 18;

[0055] Before pre-compression of the contact spring assembly: the end of the first shoulder 10 abuts against the third shoulder 14; the contact spring 3 and the contact spring seat 5 are sleeved on the contact spring rod 4, with the contact spring 3 located between the contact spring seat 5 and the shoulder; the first connecting component 2 is a first bolt, which passes through the through hole and the threaded hole in sequence to connect the contact spring pressure rod connecting plate 1 and the contact spring seat 5;

[0056] After the contact spring assembly is assembled: the contact spring 3 and the contact spring seat 5 are sleeved on the contact spring rod 4, and the contact spring 3 is located between the contact spring seat 5 and the first shoulder 10; the contact spring positioning sleeve 6 is sleeved on the end of the contact spring rod 4 provided with a first pin hole, the first pin hole corresponds to the second pin hole one by one, and is fixed by a pin 7; the contact spring connecting rod 8 is sleeved on the outside of the contact spring positioning sleeve 6, the second shoulder 11 abuts against the third shoulder 14, and is located between the third shoulder 14 and the contact spring seat 5, the second connecting assembly 9 is a second bolt, the second bolt passes through the through hole and the threaded hole in sequence, and presses the second shoulder 11, the length of the second bolt is shorter than the first bolt, and the second bolt is sleeved with a washer.

[0057] It should be noted that in Examples 1 and 2, whether internal threaded holes or external threaded rods are provided at both ends of the entire contact spring assembly can be determined according to the actual situation during the installation of the arc extinguishing chamber. The purpose is to cooperate with the installation of the arc extinguishing chamber and is not limited to these two methods.

[0058] The assembly process of the contact spring assembly is as follows: first, the contact spring 3 is pre-compressed, and before pre-compression, press Figure 1Assemble, then use the first bolt to connect the contact spring pressure rod connecting plate 1 and the contact spring seat 5, and continuously tighten the first bolt to continuously compress the contact spring 3 set between the contact spring pressure rod connecting plate 1 and the contact spring seat 5 until the required compression amount is reached or exceeds the required compression amount. At this time, the contact spring 3 will not reset, and the contact spring positioning sleeve 6 is not under force and can move up and down and rotate left and right. After the required contact spring compression amount is reached or exceeds the required compression amount, since the contact spring positioning sleeve 6 is not under force, the pin 7 is inserted through the coaxial pin holes on the contact spring rod 4 and the contact spring positioning sleeve 6, that is, inserted into the first pin hole and the second pin hole, completing the pre-stressing process; then remove the first bolt, remove the contact spring pressure rod connecting plate 1, put the contact spring connecting rod 8 on the contact spring positioning sleeve 6, flip the removed contact spring pressure rod connecting plate 1, connect it to the contact spring seat 5 through the second bolt, and press the second shoulder 11 on the contact spring connecting rod 8 to form Figure 3 or Figure 6 The assembly structure completes the assembly of the contact spring assembly, and the assembly is simple to install, flexible to adjust, low in manufacturing cost, and no waste is generated.

[0059] The utility model provides an arc extinguishing chamber, comprising the above-mentioned contact spring assembly. The arc extinguishing chamber has a simple structure and is easy to repair and maintain.

[0060] To sum up, the utility model provides a contact spring assembly and an arc extinguishing chamber. The contact spring assembly does not require the use of special tooling. The pre-compression process of the contact spring can be completed by relying solely on the cooperation of various parts in the contact spring assembly. The entire contact spring assembly is simple to install and flexible to adjust. The cost is low and there is no waste. If the product needs maintenance after leaving the factory, there is no need to carry special tooling, which is convenient and quick.

[0061] The above description is merely a preferred embodiment of the present invention and is not intended to impose any limitation on the technical solution of the present invention. Those skilled in the art should understand that, without departing from the spirit and principles of the present invention, the technical solution can also be subjected to several simple modifications and replacements, and these modifications and replacements are also within the scope of protection covered by the claims.

Claims

1. A contact spring assembly, characterized in that: It comprises a contact spring pressure rod connecting plate (1), a first connecting assembly (2), a contact spring (3), a contact spring rod (4), a contact spring seat (5), a contact spring positioning sleeve (6), a contact spring connecting rod (8) and a second connecting assembly (9); The contact spring rod (4) is provided with a first shoulder (10) at one end and a first pin hole at the other end; the contact spring positioning sleeve (6) is provided with a second pin hole; the contact spring connecting rod (8) is provided with a second shoulder (11); Before the contact spring assembly is pre-compressed: the end of the first shoulder (10) abuts against the contact spring pressure rod connecting plate (1); the contact spring (3) and the contact spring seat (5) are sleeved on the contact spring rod (4), and the contact spring (3) is located between the contact spring seat (5) and the first shoulder (10); the contact spring seat (5) and the contact spring pressure rod connecting plate (1) are detachably connected via the first connecting assembly (2); After the contact spring assembly is assembled: the contact spring (3) and the contact spring seat (5) are sleeved on the contact spring rod (4), and the contact spring (3) is located between the contact spring seat (5) and the first shoulder (10); the contact spring positioning sleeve (6) is sleeved on one end of the contact spring rod (4) provided with a first pin hole, the first pin hole corresponds to the second pin hole one by one, and is fixed by a pin (7); the contact spring connecting rod (8) is sleeved on the outside of the contact spring positioning sleeve (6), the second shoulder (11) is located between the contact spring pressure rod connecting plate (1) and the contact spring seat (5), the contact spring pressure rod connecting plate (1) and the contact spring seat (5) are connected through the second connecting assembly (9), and the second shoulder (11) is pressed.

2. The contact spring assembly according to claim 1, wherein: The contact spring pressure rod connecting plate (1) is provided with a through hole, the contact spring seat (5) is provided with a threaded hole, the first connecting component (2) is a first bolt, and the second connecting component (9) is a second bolt; before pre-compression of the contact spring component, the first bolt passes through the through hole and the threaded hole in sequence to connect the contact spring pressure rod connecting plate (1) and the contact spring seat (5); after the contact spring component is assembled, the second bolt passes through the through hole and the threaded hole in sequence to tighten the second shoulder (11).

3. The contact spring assembly according to claim 1, wherein: The contact spring pressure rod connecting plate (1) is provided with a third shoulder (14). Before the contact spring assembly is pre-compressed, the first shoulder (10) abuts against the third shoulder (14); after the contact spring assembly is assembled, the second shoulder (11) abuts against the third shoulder (14) and is located between the third shoulder (14) and the contact spring seat (5).

4. The contact spring assembly according to claim 1, wherein: A limiting groove (15) is provided on the side of the contact spring seat (5) that contacts the contact spring (3).

5. The contact spring assembly according to claim 1, wherein: A boss (16) is provided on one side of the contact spring seat (5) close to the contact spring connecting rod (8); the boss (16) has a diameter greater than the small end diameter of the contact spring positioning sleeve (6) and less than or equal to the inner diameter of the contact spring connecting rod (8).

6. The contact spring assembly according to claim 1, wherein: The contact spring rod (4) is provided with a first shoulder (10), one end of which is connected to a first externally threaded rod (12).

7. The contact spring assembly according to claim 1, wherein: The contact spring rod (4) is provided with a first shoulder (10), and one end thereof is provided with a first internal threaded hole (13).

8. The contact spring assembly according to claim 1, wherein: A second internal threaded hole (17) is provided at the end of the contact spring connecting rod (8).

9. The contact spring assembly according to claim 1, wherein: A second externally threaded rod (18) is provided at the end of the contact spring connecting rod (8).

10. An arc extinguishing chamber, characterized in that: The contact spring assembly comprises the contact spring assembly according to any one of claims 1 to 9.

Images