Combined extension spring

Abstract

The utility model provides a combined extension spring, which relates to the technical field of extension springs, and comprises an extension spring mechanism, a connecting mechanism is arranged on the extension spring mechanism, the connecting mechanism comprises two placing grooves, a placing block is arranged in each placing groove, and two symmetrical rectangular holes are formed in the inner wall of each placing groove. According to the nested combined extension spring, the connecting mechanism is arranged, so that the larger spring and the smaller spring can be conveniently disassembled and assembled by the nested combined extension spring, that is, when the larger spring or the smaller spring in the nested combined extension spring is damaged, the larger spring or the smaller spring can be directly replaced, and the replacement is convenient. Compared with the prior art, the nested combined type extension spring has the advantages that the whole nested combined type extension spring is prevented from being replaced, so that the material cost is reduced, the resource waste is avoided, the use effect of the nested combined type extension spring is improved, and the use efficiency of the nested combined type extension spring is also improved.

Description

Technical Field

[0001] The utility model relates to the technical field of extension springs, in particular to a combined extension spring. Background Technique

[0002] An extension spring is a spring that generates elastic deformation by bearing tensile force and can return to its original state after the tensile force disappears. It is widely used in fitness equipment, mechanical devices, toys and other fields. Existing extension springs are mostly used individually. However, a single extension spring is prone to fatigue failure during long-term high-frequency operation. At this time, in order to improve the stability and reliability of the extension spring during use, a combined extension spring is used.

[0003] Existing combined extension springs can be divided into types such as series combined extension springs, parallel combined extension springs, and nested combined extension springs. Among them, the nested combined extension spring generally fixes and nests one or more smaller springs inside a larger spring. Although this fixed nested combined connection method can tightly connect the larger spring and the smaller spring, avoiding misalignment or sliding between the larger spring and the smaller spring, thus ensuring the stability of the overall performance of the nested combined extension spring, it is not convenient to disassemble and assemble the larger spring and the smaller spring. That is, when the larger spring or the smaller spring in the nested combined extension spring is damaged, due to its fixed connection method, the entire nested combined extension spring needs to be replaced, rather than directly replacing the larger spring or the smaller spring. This not only increases the material cost but also causes waste of resources, reducing both the use effect and the use efficiency of the nested combined extension spring.

[0004] Therefore, it is necessary to propose a combined extension spring to solve the above-mentioned technical problems. Summary of the Utility Model

[0005] The purpose of the utility model is to solve the problem in the prior art that it is not convenient to disassemble and assemble the larger spring and the smaller spring in the existing nested combined extension spring. That is, when the larger spring or the smaller spring in the nested combined extension spring is damaged, due to its fixed connection method, the entire nested combined extension spring needs to be replaced, rather than directly replacing the larger spring or the smaller spring. This not only increases the material cost but also causes waste of resources, reducing both the use effect and the use efficiency of the nested combined extension spring. A combined extension spring is proposed.

[0006] To achieve the above purpose, the utility model adopts the following technical scheme: A combined extension spring, comprising: a spring mechanism, and a connection mechanism is arranged on the spring mechanism;

[0007] The connecting mechanism includes two placement grooves, each of which is provided with a placement block inside. Two symmetrically arranged rectangular holes are formed in the inner wall of each placement groove. A rectangular block is movably sleeved in each rectangular hole. Rubber pads are adhesively connected to both sides of each rectangular block. A clamping hole is formed on one side of each rectangular block. The four clamping holes are divided into two groups, and a clamping block is movably clamped between the interiors of each group of clamping holes.

[0008] Preferably, the four rectangular blocks are divided into two groups. The surfaces of each placement block are fixedly connected to the surfaces of each placement block on the side where each group of rectangular blocks is close to the placement block. The eight rubber pads are divided into four groups, and the opposite sides of each group of rubber pads are respectively in contact with both sides of the inner wall of each rectangular hole.

[0009] Preferably, the tension spring mechanism includes two circular ring blocks. A first circular plate is arranged inside each circular ring block. Hooks are fixed to the opposite sides of the two first circular plates.

[0010] Preferably, a first spring is fixed to the opposite sides of the two circular ring blocks. Two symmetrically arranged round rods are fixed to the opposite sides of the two first circular plates.

[0011] Preferably, second circular plates are fixed to the bottoms of two of the round rods and the tops of the other two round rods. Second springs are fixed to the opposite sides of the two second circular plates.

[0012] Preferably, the opposite ends of the two second springs are respectively fixed to the opposite sides of the two first circular plates. The bottom ends of two of the round rods movably penetrate through the tops of one of the second circular plates, and the top ends of the other two round rods movably penetrate through the bottoms of the other second circular plate.

[0013] Preferably, the two placement grooves are respectively formed on the outer walls of the circular ring blocks. The surfaces of each group of rectangular blocks away from the placement blocks movably penetrate through the outer surfaces of each first circular plate.

[0014] Preferably, the surfaces of two groups of rubber pads away from the placement blocks movably penetrate through the outer surfaces of one of the first circular plates, and the surfaces of the other two groups of rubber pads away from the placement blocks movably penetrate through the outer surfaces of the other first circular plate.

[0015] Compared with the prior art, the advantages and positive effects of the present utility model are as follows.

[0016] 1. In the present utility model, by providing a connection mechanism, the nested combined tension spring can facilitate the disassembly and assembly of a larger spring and a smaller spring. That is, when the larger spring or the smaller spring in the nested combined tension spring is damaged, the larger spring or the smaller spring can be directly replaced, avoiding the need to replace the entire nested combined tension spring. This not only reduces the material cost but also avoids waste of resources, improving both the usage effect and the usage efficiency of the nested combined tension spring. With the cooperation of the clamping block and the clamping hole, the rectangular block can be prevented from automatically falling out of the rectangular hole. With the cooperation of the rubber pad and the rectangular hole, the stability of the rectangular block inside the rectangular hole can be increased.

[0017] 2. In the present utility model, by providing a tension spring mechanism, the stability and reliability of the tension spring during use can be improved. With the cooperation of the hook, the first circular plate, and the round rod, the second circular plate can be driven to move vertically. With the cooperation of the hook, the first circular plate, and the ring block, the first spring can be stretched. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a perspective view of a combined tension spring proposed by the present utility model;

[0019] Figure 2 is a partial perspective view of the tension spring mechanism of a combined tension spring proposed by the present utility model;

[0020] Figure 3 is a partially sectional perspective view of the connection mechanism of a combined tension spring proposed by the present utility model;

[0021] Figure 4 is a partial perspective view of the connection mechanism of a combined tension spring proposed by the present utility model;

[0022] Figure 5 is a partial perspective view of a combined tension spring proposed by the present utility model;

[0023] Figure 6 is a perspective view of the clamping block of a combined tension spring proposed by the present utility model;

[0024] Figure 7 is another state perspective view of the clamping block of a combined tension spring proposed by the present utility model.

[0025] LEGEND: 1. Tension spring mechanism; 101. Ring block; 102. First circular plate; 103. Hook; 104. First spring; 105. Round rod; 106. Second circular plate; 107. Second spring; 2. Connection mechanism; 201. Placing groove; 202. Placing block; 203. Rectangular hole; 204. Rectangular block; 205. Rubber pad; 206. Clamping hole; 207. Clamping block. Detailed implementation manners

[0026] In order to more clearly understand the above-mentioned objects, features and advantages of the present utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments may be combined with each other.

[0027] In the following description, many specific details are set forth in order to fully understand the present utility model. However, the present utility model may also be implemented in other ways different from those described herein. Therefore, the present utility model is not limited by the limitations of the specific embodiments disclosed in the following specification.

[0028] As Figures 1-7 shown, the present utility model provides a combined tension spring, comprising: a tension spring mechanism 1, and a connection mechanism 2 is arranged on the tension spring mechanism 1;

[0029] The connecting mechanism 2 includes two placement grooves 201. Inside each placement groove 201, there is a placement block 202. On the inner wall of each placement groove 201, there are two symmetrically arranged rectangular holes 203. Inside each rectangular hole 203, there is a rectangular block 204 movably sleeved. On both sides of each rectangular block 204, there is a rubber pad 205 adhesively connected. On one side of each rectangular block 204, there is a card hole 206. The four card holes 206 are divided into two groups. Between the interiors of each group of card holes 206, there is a card block 207 movably clamped. The four rectangular blocks 204 are divided into two groups. On the side of each group of rectangular blocks 204 close to the placement block 202, they are respectively fixed to the surface of each placement block 202. The eight rubber pads 205 are divided into four groups. On the opposite sides of each group of rubber pads 205, they are respectively in contact with both sides of the inner wall of each rectangular hole 203. The tension spring mechanism 1 includes two ring blocks 101. Inside each ring block 101, there is a first circular plate 102. On the opposite sides of the two first circular plates 102, there are hooks 103 fixed. On the opposite sides of the two ring blocks 101, there is a first spring 104 fixed. On the opposite sides of the two first circular plates 102, there are two symmetrically arranged round rods 105 fixed. At the bottoms of two of the round rods 105 and the tops of the other two round rods 105, there are second circular plates 106 fixed. On the opposite sides of the two second circular plates 106, there are second springs 107 fixed. The opposite ends of the two second springs 107 are respectively fixed to the opposite sides of the two first circular plates 102. The bottom ends of two of the round rods 105 respectively pass through the tops of one of the second circular plates 106 movably, and the top ends of the other two round rods 105 respectively pass through the bottoms of the other second circular plate 106 movably. The two placement grooves 201 are respectively opened on the outer walls of the ring blocks 101. On the side of each group of rectangular blocks 204 away from the placement block 202, they respectively pass through the outer surfaces of each first circular plate 102 movably. On the side of two of the groups of rubber pads 205 away from the placement block 202, they respectively pass through the outer surface of one of the first circular plates 102 movably, and on the side of the other two groups of rubber pads 205 away from the placement block 202, they respectively pass through the outer surface of the other first circular plate 102 movably.

[0030] The achieved effect is that when it is necessary to separate the larger spring from the smaller spring in the nested combined tension spring, first, one of the clamping blocks 207 is removed from between the corresponding set of clamping holes 206. Subsequently, a force is applied to the corresponding set of rectangular blocks 204 to make them move in the direction closer to the corresponding placement block 202. At this time, the moving set of rectangular blocks 204 will drive the corresponding rubber pads 205 to move, and at the same time, the moving set of rectangular blocks 204 will drive the corresponding placement block 202 to move. When the corresponding placement block 202 moves out of the interior of the corresponding placement groove 201, a force is directly applied to the corresponding placement block 202 to make it move in the direction away from the corresponding rectangular block 204. At this time, the moving placement block 202 will drive the corresponding set of rectangular blocks 204 to move until the corresponding set of rectangular blocks 204 all move out of the interior of the corresponding rectangular holes 203. At this time, the moving rectangular blocks 204 will all cause the corresponding rubber pads 205 to move out of the interior of the corresponding rectangular holes 203. Then, operate according to the above operation steps to move the other set of rectangular blocks 204 and the corresponding rubber pads 205 out of the interior of the corresponding rectangular holes 203. Then, a force can be applied to one of the hooks 103 to make this hook 103 move vertically upward. At this time, the moving hook 103 will drive one of the first circular plates 102 to move, and the moving first circular plate 102 will drive the other second circular plate 106 to move under the cooperation of the corresponding round rod 105. At the same time, the moving first circular plate 102 will also drive one of the second circular plates 106 to move under the cooperation of the corresponding second spring 107. At the same time, one of the moving second circular plates 106 will drive the other first circular plate 102 to move under the cooperation of the corresponding round rod 105, and the other moving second circular plate 106 will also drive the other first circular plate 102 to move under the cooperation of the connected second spring 107. At this time, the two second springs 107 can be separated from the first spring 104. When it is necessary to stretch the nested combined tension spring, directly perform the reverse operation according to the above operation steps to make the above-mentioned components all return to their original positions. Subsequently, apply a force in the opposite direction to the two hooks 103 to make the two hooks 103 move in the opposite direction. At this time, the moving hooks 103 will all drive the corresponding first circular plates 102 to move in the opposite direction, and the two first circular plates 102 moving in the opposite direction will drive the corresponding ring blocks 101 to move in the opposite direction under the cooperation of the connecting mechanism 2. At this time, the two ring blocks 101 moving in the opposite direction will stretch the first spring 104, and at the same time, the two first circular plates 102 moving in the opposite direction will make the opposite ends of the two second springs 107 move in the opposite direction. At the same time, the two first circular plates 102 moving in the opposite direction will drive the corresponding second circular plates 106 to move towards each other under the cooperation of the corresponding round rods 105,When the two second circular plates 106 that move towards each other move towards each other, the relative ends of the two second springs 107 will move towards each other. At this time, both of the two second springs 107 will be stretched, that is, the nested combined tension spring is stretched.

[0031] Working principle: When it is necessary to separate the larger spring from the smaller spring in the nested combined tension spring, first remove one of the clamping blocks 207 from between the corresponding set of clamping holes 206. Then, apply a force to the corresponding set of rectangular blocks 204 to make them move in the direction closer to the corresponding placement block 202. At this time, the moving set of rectangular blocks 204 will drive the corresponding rubber pads 205 to move, and at the same time, the moving set of rectangular blocks 204 will drive the corresponding placement block 202 to move. When the corresponding placement block 202 moves out of the interior of the corresponding placement groove 201, directly apply a force to the corresponding placement block 202 to make it move in the direction away from the corresponding rectangular block 204. At this time, the moving placement block 202 will drive the corresponding set of rectangular blocks 204 to move until the corresponding set of rectangular blocks 204 all move out of the interior of the corresponding rectangular holes 203. At this time, the moving rectangular blocks 204 will all cause the corresponding rubber pads 205 to move out of the interior of the corresponding rectangular holes 203. Then, operate according to the above operation steps to move the other set of rectangular blocks 204 and the corresponding rubber pads 205 out of the interior of the corresponding rectangular holes 203. Then, apply a force to one of the hooks 103 to make this hook 103 move vertically upward. At this time, the moving hook 103 will drive one of the first circular plates 102 to move, and the moving first circular plate 102 will drive the other second circular plate 106 to move under the cooperation of the corresponding round rod 105. At the same time, the moving first circular plate 102 will also drive one of the second circular plates 106 to move under the cooperation of the corresponding second spring 107. At the same time, one of the moving second circular plates 106 will drive the other first circular plate 102 to move under the cooperation of the corresponding round rod 105, and the other moving second circular plate 106 will also drive the other first circular plate 102 to move under the cooperation of the connected second spring 107. At this time, the two second springs 107 can be separated from the first spring 104. When it is necessary to stretch the nested combined tension spring, directly perform the reverse operation according to the above operation steps to make the above components all return to their original positions. Then, apply a force in the opposite direction to the two hooks 103 to make the two hooks 103 move in the opposite direction. At this time, the moving hooks 103 will all drive the corresponding first circular plates 102 to move in the opposite direction, and the two first circular plates 102 moving in the opposite direction will drive the corresponding ring blocks 101 to move in the opposite direction under the cooperation of the connecting mechanism 2. At this time, the two ring blocks 101 moving in the opposite direction will stretch the first spring 104, and at the same time, the two first circular plates 102 moving in the opposite direction will make the opposite ends of the two second springs 107 move in the opposite direction. At the same time, the two first circular plates 102 moving in the opposite direction will drive the corresponding second circular plates 106 to move towards each other under the cooperation of the corresponding round rods 105,The two second circular plates 106 moving towards each other will cause the opposite ends of the two second springs 107 to move towards each other. At this time, both of the two second springs 107 will be stretched, that is, the nested combined tension spring is stretched.

[0032] Among them, the clamping block 207 is an iron bar, one end of which is cut into two parts, and both of these two parts can be bent and deformed.

[0033] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention in other forms. Any person skilled in the art may use the disclosed technical content to make changes or modifications into equivalent embodiments with equivalent changes and apply them to other fields. However, as long as they do not depart from the technical solution content of the present invention, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims

1. A combined tension spring, characterized in that: include: A tension spring mechanism (1), wherein a connecting mechanism (2) is provided on the tension spring mechanism (1); The connection mechanism (2) comprises two placement grooves (201), each of which is provided with a placement block (202), and the inner wall of each of which is provided with two symmetrical rectangular holes (203), and each of which is provided with a rectangular block (204) movably sleeved inside the rectangular hole (203), and each of which is provided with a rubber pad (205) on both sides of each rectangular block (204), and a clamping hole (206) is provided on one side of each rectangular block (204), and the four clamping holes (206) are divided into two groups, and a clamping block (207) is movably clamped between the insides of each group of clamping holes (206).

2. The combined tension spring according to claim 1, characterized in that: The four rectangular blocks (204) are divided into two groups, and a side of each group of rectangular blocks (204) close to the placement block (202) is fixed to the surface of each placement block (202). The eight rubber pads (205) are divided into four groups, and the opposite sides of each group of rubber pads (205) are in contact with the two sides of the inner wall of each rectangular hole (203).

3. The combined tension spring according to claim 1, characterized in that: The tension spring mechanism (1) comprises two circular ring blocks (101), each of the circular ring blocks (101) is provided with a first circular plate (102) inside, and a draw hook (103) is fixed on the opposite sides of the two first circular plates (102).

4. The combined tension spring according to claim 3, characterized in that: A first spring (104) is fixed on the opposite side of the two annular blocks (101), and two symmetrical round rods (105) are fixed on the opposite side of the two first circular plates (102).

5. The combined tension spring according to claim 4, characterized in that: The bottoms of two of the round rods (105) and the tops of the other two round rods (105) are both fixed with second round plates (106), and the opposite sides of the two second round plates (106) are both fixed with second springs (107).

6. The combined tension spring according to claim 5, characterized in that: The opposite ends of the two second springs (107) are respectively fixed to the opposite sides of the two first circular plates (102), wherein the bottom ends of the two round rods (105) are movable through the top of one of the second circular plates (106), and the top ends of the other two round rods (105) are movable through the bottom of the other second circular plate (106).

7. The combined tension spring according to claim 3, characterized in that: The two placement grooves (201) are respectively opened on the outer wall of the annular block (101), and a side of each group of rectangular blocks (204) away from the placement block (202) is movable through the outer surface of each first circular plate (102).

8. The combined tension spring according to claim 3, characterized in that: The sides of two groups of rubber pads (205) away from the placement block (202) are movable through the outer surface of one of the first circular plates (102), and the sides of the other two groups of rubber pads (205) away from the placement block (202) are movable through the outer surface of another first circular plate (102).

Images