Spring buffer capable of preventing springback impact

Abstract

The invention relates to the technical field of spring buffers, in particular to a springback impact prevention spring buffer which is characterized in that a pipe body and a fixing column are arranged on the surface of a positioning seat, a positioning rod is arranged in the fixing column, the surface of a supporting rod is sleeved with a limiting plate, a bottom plate is arranged at the bottom of the positioning rod, and a buffer rod is inserted into the fixing pipe; the surface of the buffer rod is sleeved with a first buffer spring, and a second buffer spring is arranged in the fixing pipe. The device has the beneficial effects that a first buffer spring and a second buffer spring are matched, a buffer rod is used for buffering and reducing impact force, then when the buffer rod is pressed to move downwards, a positioning rod can be pressed, and therefore the limiting effect of a positioning plate on a limiting plate can be lost, the limiting plate can be pushed through a second spring, and the service life of the limiting plate is prolonged. Therefore, one end of the fixing plate can be clamped into the positioning clamping groove, the buffer rod can be limited by inserting the fixing plate into the positioning clamping groove, and the situation that the buffer rod rebounds due to the fact that the first buffer spring and the second buffer spring are pressed is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of spring buffers, in particular to a spring buffer for preventing rebound impact. Background Art

[0002] Spring buffer is a device that uses the elastic properties of springs to absorb and release impact energy. It is widely used in mechanical equipment, transportation, building structures and other fields. It can effectively reduce shock and vibration and protect the safety and stability of equipment and structures.

[0003] Buffers are important safety components of elevator equipment, used to protect the elevator car from falling or hitting the top. Buffers are divided into two types, namely spring buffers and hydraulic buffers. Spring buffers are energy storage components. Their structure will produce a large impact rebound when hit by the car or counterweight at high speed, so they are only suitable for low-speed elevators with a rated speed of less than or equal to 1 m / s. Hydraulic buffers are energy-consuming components. When hit by the car or counterweight at high speed, most of the kinetic energy is converted into heat energy through hydraulic oil, thereby reducing the impact force, so they are suitable for elevators of any speed specifications.

[0004] However, traditional spring buffers have the safety hazard of impact rebound, which can easily cause secondary injuries to occupants in the falling elevator, and hydraulic buffers require frequent maintenance to ensure that the buffers are not prone to oil leakage, deformation and other problems. For this reason, the present invention proposes a spring buffer that prevents rebound impact to solve the above-mentioned technical problems. Summary of the invention

[0005] The object of the present invention is to provide a spring buffer for preventing rebound impact, so as to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a spring buffer for preventing rebound impact, the spring buffer for preventing rebound impact comprising: a positioning seat, a tube body and a fixing column are arranged on the surface of the positioning seat, a through hole is opened on the surface of the fixing column, a positioning rod is arranged in the through hole, a placement groove is opened in the positioning seat, a support rod is arranged on the side of the placement groove, a limiting plate is sleeved on the surface of the support rod, a bottom plate is arranged at the bottom of the positioning rod, and a positioning plate is arranged on the end surface of the bottom plate;

[0007] A fixed tube is provided, a buffer rod is inserted into the fixed tube, a buffer spring 1 is sleeved on the surface of the buffer rod, a buffer spring 2 is arranged in the fixed tube, a positioning slot is opened on the side of the buffer rod, and a fixed plate is arranged in the fixed tube.

[0008] Preferably, the fixed tube can be fixedly connected to the tube body by means of positioning bolts, a limiting groove is provided on the inner side of the fixed tube, a limiting block is provided on the side of the buffer rod, the limiting block is a square plate-shaped structure, the limiting block is inserted into the limiting groove, and the limiting block can be displaced up and down along the limiting groove.

[0009] Preferably, a thread is provided on the surface of one end of the buffer rod, a threaded tube is screwed onto the thread, a pressure-resistant plate is provided on the surface of the threaded tube, one end of a buffer spring is fixedly connected to the surface of the fixed tube, the other end of the buffer spring is against the bottom of the threaded tube, and the buffer rod can move up and down in the fixed rod.

[0010] Preferably, one end of the second buffer spring is fixedly connected to the bottom of the buffer rod, and the other end of the second buffer spring rests on the surface of the fixed column. A movable groove is provided on the end face of the fixed tube, and a limiting opening is provided on the side of the movable groove. The limiting opening is a square plate-like structure as a whole, and two groups of limiting openings are provided. The two groups of limiting openings are symmetrically distributed about the left and right sides of the second buffer spring.

[0011] Preferably, a guide rod is provided on the side of the movable groove, and the fixed plate is sleeved on the guide rod. The fixed plate as a whole is an "L"-shaped plate structure. One end of the fixed plate can pass through the limiting opening, and one end of the fixed plate can be inserted into the positioning slot. The positioning slot is an annular plate structure, and the side height of the positioning slot is greater than the height of one end of the fixed plate.

[0012] Preferably, the fixed plate can be displaced along the guide rod, a first spring is sleeved on the surface of the guide rod, one end of the first spring is fixedly connected to the side of the movable groove, and the other end of the first spring is fixedly connected to the side of the fixed plate. Two groups of fixed plates are provided, and the two groups of fixed plates are symmetrically distributed about the positioning rod.

[0013] Preferably, one end of the fixing plate can be inserted into the placement groove, one end of the support rod is fixedly connected to the side of the placement groove, two groups of support rods are provided, and the two groups of support rods are symmetrically distributed about the fixing column. The end face of the support rod is provided with a baffle, and the baffle is an overall circular plate-shaped structure.

[0014] Preferably, the limit plate can be displaced along the support rod, a second spring is sleeved on the surface of the support rod, one end of the second spring is fixedly connected to the side of the placement groove, and the other end of the second spring is fixedly connected to the side of the limit plate, a chamfer is provided at the bottom of the limit plate, and the limit plate as a whole has a square plate-like structure.

[0015] Preferably, the positioning rod can slide up and down in the through hole, the through hole passes through the placement groove, the bottom of the positioning rod is fixedly connected to the surface of the bottom plate, the bottom plate is a square plate structure, the positioning plate is fixedly connected to the end face of the bottom plate, the positioning plate can fit with the chamfered surface opened at the bottom of the limit plate, and a return spring is provided at the bottom of the bottom plate, one end of the return spring is fixedly connected to the surface of the placement groove, and the other end of the return spring is fixedly connected to the bottom of the bottom plate.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The spring buffer for preventing rebound impact proposed in the present invention can, when in use, firstly use the buffer rod to buffer and reduce the impact force through the cooperation of the buffer spring 1 and the buffer spring 2 to protect the falling elevator. Then, when the buffer rod is pressed and moved downward, it can press the positioning rod, so that the positioning plate loses its limiting effect on the limiting plate, so that the limiting plate can be pushed by the second spring, so that one end of the fixed plate can be stuck in the positioning groove. Therefore, the buffer rod can be limited by inserting the fixed plate into the positioning groove, thereby preventing the buffer rod from rebounding due to the pressure of the buffer spring 1 and the buffer spring 2, and avoiding the problem of secondary injury to the internal personnel caused by the impact rebound of the falling elevator. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the device of the present invention;

[0019] Figure 2 This is a schematic diagram of the structure of the buffer rod of the present invention;

[0020] Figure 3 It is a partial cross-sectional view of the device of the present invention;

[0021] Figure 4 for Figure 3 The enlarged structural diagram at A in the middle;

[0022] Figure 5 It is a schematic diagram of the structure of the device of the present invention when it is partially cut away and tilted;

[0023] Figure 6 for Figure 5 The enlarged structural diagram at B in the middle;

[0024] Figure 7 This is a schematic diagram of the structure of the structural positioning seat of the present invention;

[0025] Figure 8 This is a schematic diagram of the structural positioning tube structure of the present invention;

[0026] Fig. 9 This is a partial cross-sectional view of the structural positioning tube of the present invention.

[0027] In the figure: 1. positioning seat; 2. tube body; 3. fixing column; 4. through hole; 5. positioning rod; 6. placement slot;

[0028] 7. Support rod; 8. Limit plate; 9. Bottom plate; 10. Positioning plate; 11. Fixed pipe; 12. Buffer rod;

[0029] 13. Buffer spring 1; 14. Buffer spring 2; 15. Positioning slot; 16. Fixing plate; 17. Positioning bolt; 18. Limiting slot; 19. Limiting block; 20. Threaded tube; 21. Pressure plate; 22. Moving slot;

[0030] 23. Limiting opening; 24. Guide rod; 25. First spring; 26. Baffle; 27. Second spring; 28. Return spring. DETAILED DESCRIPTION

[0031] In order to make the purpose and technical solution of the present invention clearly and completely described, and the advantages more clearly understood, the embodiments of the present invention are further described in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are part of the embodiments of the present invention, rather than all of the embodiments, and are only used to explain the embodiments of the present invention, and are not used to limit the embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] Example 1: Please refer to Figure 1-Figure 9 The present invention provides a technical solution: a spring buffer for preventing rebound impact, the spring buffer for preventing rebound impact comprises: a positioning seat 1, a tube body 2 and a fixing column 3 are arranged on the surface of the positioning seat 1, a through hole 4 is opened on the surface of the fixing column 3, a positioning rod 5 is arranged in the through hole 4, a placement groove 6 is opened in the positioning seat 1, a support rod 7 is arranged on the side of the placement groove 6, a limiting plate 8 is sleeved on the surface of the support rod 7, a bottom plate 9 is arranged at the bottom of the positioning rod 5, and a positioning plate 10 is arranged on the end surface of the bottom plate 9;

[0033] A fixed tube 11, a buffer rod 12 is inserted into the fixed tube 11, a buffer spring 13 is sleeved on the surface of the buffer rod 12, a buffer spring 2 14 is arranged in the fixed tube 11, a positioning slot 15 is opened on the side of the buffer rod 12, and a fixing plate 16 is arranged in the fixed tube 11;

[0034] The buffer rod 12 can be used to buffer and reduce the impact force through the cooperation of the buffer spring 13 and the buffer spring 2 14 to protect the falling elevator. Then, when the buffer rod 12 is pressed and moved downward, it can press the positioning rod 5, so that the positioning plate 10 loses its limiting effect on the limiting plate 8, so that the limiting plate 8 can be pushed by the second spring 27, so that one end of the fixed plate 16 can be inserted into the positioning slot 15. Therefore, the fixed plate 16 can be inserted into the positioning slot 15 to limit the buffer rod 12, thereby preventing the buffer rod 12 from rebounding due to the pressure of the buffer spring 13 and the buffer spring 2 14, and avoiding the problem of secondary injury to the internal personnel caused by the impact rebound of the falling elevator.

[0035] Embodiment 2: On the basis of embodiment 1, in order to facilitate the use of the buffer rod 12 for buffering, a buffer spring 13 and a buffer spring 2 14 are provided. The fixed tube 11 can be fixedly connected to the tube body 2 by a positioning bolt 17. A limiting groove 18 is provided on the inner side of the fixed tube 11. A limiting block 19 is provided on the side of the buffer rod 12. The limiting block 19 is a square plate-shaped structure. The limiting block 19 is inserted into the limiting groove 18. The limiting block 19 can move up and down along the limiting groove 18. A thread is provided on the surface of one end of the buffer rod 12. A threaded tube 20 is screwed on the thread. A pressure-resistant plate 21 is provided on the surface of the threaded tube 20. , one end of the buffer spring 13 is fixedly connected to the surface of the fixed tube 11, and the other end of the buffer spring 13 is against the bottom of the threaded tube 20. The buffer rod 12 can move up and down in the fixed rod 11. One end of the buffer spring 14 is fixedly connected to the bottom of the buffer rod 12, and the other end of the buffer spring 14 is against the surface of the fixed column 3. A moving groove 22 is provided on the end surface of the fixed tube 11, and a limiting opening 23 is provided on the side of the moving groove 22. The limiting opening 23 is a square plate-shaped structure as a whole. The limiting opening 23 is provided with two groups, and the two groups of limiting openings 23 are symmetrically distributed about the buffer spring 14.

[0036] When in use, the fixing tube 11 can be first installed in the tube body 2 using the positioning bolt 17, and then when the falling elevator contacts the surface of the pressure-resistant plate 21, the compression and buffering effect of the buffer spring 13 and the buffer spring 2 14 can be used to reduce the impact force of the falling elevator. One end of the buffer spring 13 rests against the bottom of the threaded tube 20, so that it is convenient to remove the buffer rod 12 later and avoid the inconvenience of disassembling and installing the buffer rod 12 after the buffer spring 13 is fixedly connected to the threaded tube 20. The limit block 19 cooperates with the setting of the limit groove 18 to prevent the buffer rod 12 from being pulled out from above the fixing tube 11 and to limit the buffer rod 12.

[0037] In order to facilitate the limiting of the buffer rod 12, a fixed plate 16 is provided, and a guide rod 24 is provided on the side of the movable groove 22. The fixed plate 16 is sleeved on the guide rod 24. The fixed plate 16 is an "L"-shaped plate structure as a whole. One end of the fixed plate 16 can pass through the limiting opening 23, and one end of the fixed plate 16 can be inserted into the positioning slot 15. The positioning slot 15 is an annular plate structure. The side height of the positioning slot 15 is greater than the height of one end of the fixed plate 16. The fixed plate 16 can be displaced along the guide rod 24. A first spring 25 is sleeved on the surface of the guide rod 24. One end of the first spring 25 is fixedly connected to the side of the movable groove 22, and the other end of the first spring 25 is fixedly connected to the side of the fixed plate 16. Two groups of fixed plates 16 are provided, and the two groups of fixed plates 16 are symmetrically distributed about the positioning rod 5;

[0038] When the buffer rod 12 moves down to press the positioning rod 5, the positioning plate 10 will lose the limit on the limit plate 8, so that the fixing plate 16 can be pushed by the limit plate 8, and one end of the fixing plate 16 can pass through the limit opening 23 so that one end of the fixing plate 16 can be inserted into the positioning slot 15, and then the buffer rod 12 can be limited. The upward elastic force of the buffer spring 13 and the buffer spring 2 14 can make the positioning slot 15 generate an upward thrust, so that one end of the fixing plate 16 can always be stuck in the positioning slot 15 to fix the buffer rod 12, thereby avoiding the rebound problem of the buffer rod 12.

[0039] Embodiment 3: On the basis of embodiment 2, in order to facilitate the displacement of the fixing plate 16, a positioning rod 5 is provided, one end of the fixing plate 16 can be inserted into the placement groove 6, one end of the support rod 7 is fixedly connected to the side of the placement groove 6, and the support rod 7 is provided with two groups, and the two groups of support rods 7 are symmetrically distributed about the fixing column 3. The end surface of the support rod 7 is provided with a baffle 26, and the baffle 26 is a circular plate-shaped structure as a whole. The limit plate 8 can be displaced along the support rod 7, and a second spring 27 is sleeved on the surface of the support rod 7. One end of the second spring 27 is fixedly connected to the side of the placement groove 6, and the other end of the second spring 27 is fixedly connected Connected to the side of the limit plate 8, the bottom of the limit plate 8 is provided with a chamfer, the limit plate 8 is a square plate structure as a whole, the positioning rod 5 can slide up and down in the through hole 4, the through hole 4 penetrates into the placement groove 6, the bottom of the positioning rod 5 is fixedly connected to the surface of the bottom plate 9, the bottom plate 9 is a square plate structure, the positioning plate 10 is fixedly connected to the end face of the bottom plate 9, the positioning plate 10 can fit with the chamfered surface provided at the bottom of the limit plate 8, and a return spring 28 is provided at the bottom of the bottom plate 9, one end of the return spring 28 is fixedly connected to the surface of the placement groove 6, and the other end of the return spring 28 is fixedly connected to the bottom of the bottom plate 9;

[0040] When in use, the positioning rod 5 can be used to press the bottom plate 9 downward to move the positioning plate 10 downward, and then the limit plate 8 can be pushed by the elastic force of the second spring 27, so that the limit plate 8 can push the fixed plate 16, and then the fixed plate 16 can be displaced along the guide rod 24, so that one end of the fixed plate 16 can be easily inserted into the positioning slot 15, and the elastic force of the second spring 27 is greater than the elastic force of the first spring 25.

[0041] When there is no need to limit the buffer rod 12, first press the buffer rod 12 downward to make the positioning slot 15 lose the upward thrust on the fixed plate 16, and then the elastic force of the first spring 25 can be used to pull the fixed plate 16 backward in cooperation with the upward thrust of the reset spring 28. The chamfer at the bottom of the limit plate 8 and the inclination angle of the positioning plate 10 can facilitate the limit plate 8 to be pushed backward, so that the limit plate 8 and the fixed plate 16 can be reset and lose the limiting effect on the buffer rod 12.

[0042] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A spring buffer for preventing rebound impact, characterized in that: The spring buffer for preventing rebound impact comprises: a positioning seat (1), a tube body (2) and a fixing column (3) are arranged on the surface of the positioning seat (1), a through hole (4) is provided on the surface of the fixing column (3), a positioning rod (5) is arranged in the through hole (4), a placement groove (6) is provided in the positioning seat (1), a support rod (7) is arranged on the side of the placement groove (6), a limiting plate (8) is sleeved on the surface of the support rod (7), a bottom plate (9) is arranged at the bottom of the positioning rod (5), and a positioning plate (10) is arranged on the end surface of the bottom plate (9); A fixed tube (11) is provided, a buffer rod (12) is inserted into the fixed tube (11), a buffer spring (13) is sleeved on the surface of the buffer rod (12), a buffer spring (14) is arranged in the fixed tube (11), a positioning slot (15) is provided on the side of the buffer rod (12), and a fixed plate (16) is arranged in the fixed tube (11).

2. The spring buffer for preventing rebound impact according to claim 1, characterized in that: The fixing tube (11) can be fixedly connected in the tube body (2) by means of positioning bolts (17); a limiting groove (18) is provided on the inner side of the fixing tube (11); a limiting block (19) is provided on the side of the buffer rod (12); the limiting block (19) is in a square plate-like structure; the limiting block (19) is inserted into the limiting groove (18); and the limiting block (19) can move up and down along the limiting groove (18).

3. The spring buffer for preventing rebound impact according to claim 1, characterized in that: The surface of one end of the buffer rod (12) is provided with a thread, a threaded tube (20) is screwed onto the thread, a pressure-resistant plate (21) is provided on the surface of the threaded tube (20), one end of a buffer spring (13) is fixedly connected to the surface of the fixed tube (11), the other end of the buffer spring (13) is against the bottom of the threaded tube (20), and the buffer rod (12) can move up and down in the fixed rod (11).

4. The spring buffer for preventing rebound impact according to claim 1, characterized in that: One end of the second buffer spring (14) is fixedly connected to the bottom of the buffer rod (12), and the other end of the second buffer spring (14) is against the surface of the fixed column (3). The end surface of the fixed tube (11) is provided with a movable groove (22), and the side surface of the movable groove (22) is provided with a limiting opening (23). The limiting opening (23) is a square plate-shaped structure as a whole. The limiting opening (23) is provided with two groups, and the two groups of limiting openings (23) are symmetrically distributed about the second buffer spring (14).

5. The spring buffer for preventing rebound impact according to claim 4, characterized in that: A guide rod (24) is arranged on the side of the movable groove (22), and the fixed plate (16) is sleeved on the guide rod (24). The fixed plate (16) is in an "L"-shaped plate structure as a whole. One end of the fixed plate (16) can pass through the limiting opening (23), and one end of the fixed plate (16) can be inserted into the positioning groove (15). The positioning groove (15) is in an annular plate structure, and the side height of the positioning groove (15) is greater than the height of one end of the fixed plate (16).

6. The spring buffer for preventing rebound impact according to claim 1, characterized in that: The fixed plate (16) can be displaced along the guide rod (24). A first spring (25) is sleeved on the surface of the guide rod (24). One end of the first spring (25) is fixedly connected to the side of the movable groove (22). The other end of the first spring (25) is fixedly connected to the side of the fixed plate (16). Two groups of fixed plates (16) are provided. The two groups of fixed plates (16) are symmetrically distributed about the positioning rod (5).

7. The spring buffer for preventing rebound impact according to claim 1, characterized in that: One end of the fixing plate (16) can be inserted into the placement groove (6), one end of the support rod (7) is fixedly connected to the side of the placement groove (6), two groups of support rods (7) are provided, and the two groups of support rods (7) are symmetrically distributed about the fixing column (3), and the end surface of the support rod (7) is provided with a baffle (26), and the baffle (26) is a circular plate-shaped structure as a whole.

8. The spring buffer for preventing rebound impact according to claim 1, characterized in that: The limiting plate (8) can be displaced along the supporting rod (7); a second spring (27) is sleeved on the surface of the supporting rod (7); one end of the second spring (27) is fixedly connected to the side of the placement groove (6); the other end of the second spring (27) is fixedly connected to the side of the limiting plate (8); a chamfer is provided at the bottom of the limiting plate (8); and the limiting plate (8) is in the shape of a square plate as a whole.

9. The spring buffer for preventing rebound impact according to claim 1, characterized in that: The positioning rod (5) can slide up and down in the through hole (4), the through hole (4) penetrates into the placement groove (6), the bottom of the positioning rod (5) is fixedly connected to the surface of the bottom plate (9), the bottom plate (9) is a square plate structure, the positioning plate (10) is fixedly connected to the end surface of the bottom plate (9), the positioning plate (10) can fit with the chamfered surface opened at the bottom of the limiting plate (8), and a return spring (28) is arranged at the bottom of the bottom plate (9), one end of the return spring (28) is fixedly connected to the surface of the placement groove (6), and the other end of the return spring (28) is fixedly connected to the bottom of the bottom plate (9).

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