Elevator buffer

Abstract

The utility model belongs to the technical field of elevator accessories, and specifically relates to an elevator buffer, including a cylinder body, a plunger and a throttle rod, the throttle rod is arranged at the bottom of the cylinder body, the plunger is movably matched with the throttle rod, the inner diameter of the cylinder body is adapted to the outer diameter of the plunger, so that the inner diameter wall of the cylinder body guides the plunger to rise or fall throughout the entire process; the bottom cover of the plunger has a throttle hole, and the bottom cover of the plunger is riveted with a throttle ring corresponding to the throttle hole, and a sealing ring is arranged between the throttle ring and the bottom cover of the plunger. The elevator buffer of the utility model directly uses the inner diameter wall of the cylinder body to guide the plunger to rise or fall throughout the entire process, thereby reducing the overall height of the elevator buffer, and is suitable for application scenarios with limited installation space, and has a simple structure and low manufacturing cost.

Description

Technical Field

[0001] The utility model belongs to the technical field of elevator accessories, and in particular relates to an elevator buffer. Background Art

[0002] Elevator buffers are generally installed in the elevator pit to improve the safety of elevator car braking. Existing elevator buffers generally have a guide section with a certain height designed on the top of the oil cylinder. This design results in a high height of the oil cylinder, and the processing is difficult and the structure is complex. In addition, since the throttle ring and the bottom cover are integrated, the welding requirements for the throttle rod are relatively high. Utility Model Content

[0003] Based on the above-mentioned shortcomings and deficiencies in the prior art, the purpose of the utility model is to provide an elevator buffer.

[0004] In order to achieve the above utility model purpose, the utility model adopts the following technical solutions:

[0005] An elevator buffer comprises a cylinder, a plunger and a throttle rod, wherein the throttle rod is arranged at the bottom of the cylinder, the plunger is movably matched with the throttle rod, and the inner diameter of the cylinder is adapted to the outer diameter of the plunger so that the inner diameter wall of the cylinder guides the plunger to rise or fall throughout the whole process;

[0006] The bottom cover of the plunger is provided with a throttling hole, and a throttling ring corresponding to the throttling hole is embedded in the bottom cover of the plunger through riveting, and a sealing ring is arranged between the throttling ring and the bottom cover of the plunger.

[0007] As a preferred solution, the inner diameter wall at the top of the cylinder body has a dustproof mounting groove, and a dustproof ring is provided between the dustproof mounting groove and the plunger.

[0008] As a preferred solution, the dustproof ring includes an embedded section and an axially extending elastic pressing section, the embedded section is embedded in the dustproof mounting groove, and the elastic pressing section is pressed against the outer diameter wall of the plunger.

[0009] As a preferred solution, the inner diameter of the dustproof ring decreases linearly along the axial direction from the embedding section to the elastic pressing section; the minimum inner diameter of the elastic pressing section is tightly matched with the outer diameter of the plunger.

[0010] As a preferred solution, the top opening of the cylinder body has an arc-shaped guiding structure.

[0011] As a preferred solution, a sealing ring is embedded in the inner diameter wall of the plunger, and the sealing ring is in sealing contact with the plunger.

[0012] As a preferred solution, a spring seat is provided in the plunger, the spring seat abuts against the bottom cover of the plunger, a return spring is provided between the spring seat and the top cover of the plunger; the top of the throttle rod abuts against the spring seat.

[0013] As a preferred solution, the bottom cover of the plunger has a throttle hole, and the spring seat and the top cover of the plunger respectively have a through hole and an oil filling hole coaxial with the throttle hole; an oil dipstick is inserted into the oil filling hole to detect the oil level.

[0014] As a preferred solution, the oil dipstick is detachably mounted on one side of the cylinder body.

[0015] As a preferred solution, the oil filling hole is provided with an oil filling plug, and a buffer pad is provided on the top cover of the plunger.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] (1) The elevator buffer of the utility model directly uses the inner diameter wall of the cylinder body to guide the plunger to rise or fall throughout the entire process, thereby reducing the overall height of the elevator buffer. It is suitable for application scenarios with limited installation space, and has a simple structure and low manufacturing cost.

[0018] (2) The throttle ring is embedded in the bottom cover of the plunger by riveting, without welding or clamping. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of an elevator buffer according to Embodiment 1 of the present utility model;

[0020] Figure 2 It is a structural schematic diagram of the elevator buffer of Embodiment 1 of the utility model from another perspective;

[0021] Figure 3 yes Figure 2 A cross-sectional view of the AA portion in FIG.

[0022] Figure 4 yes Figure 3 A magnified view of part B in FIG.

[0023] Figure 5 It is a half-section view of the dustproof ring of Example 1 of the utility model. DETAILED DESCRIPTION

[0024] In order to more clearly illustrate the embodiments of the utility model, the specific implementation methods of the utility model will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0025] Embodiment 1:

[0026] like Figures 1 to 4As shown, the elevator buffer of this embodiment includes a cylinder body 1, a plunger 2, a throttle rod 3, a travel switch 4, a spring seat 5, a return spring 6, a dust ring 7, a sealing ring 8, and an oil dipstick 9.

[0027] Specifically, the bottom of the throttle rod 3 is fixedly installed on the bottom of the cylinder body 1 and extends vertically. The plunger 2 is vertically movable and matched with the cylinder body 1 and the throttle rod 3. The inner diameter of the cylinder body 1 is adapted to the outer diameter of the plunger 2 to ensure that the inner diameter wall of the cylinder body 1 guides the plunger 2 to rise or fall throughout the entire process. Such a design can reduce the design height of the cylinder body 1 and provide better guiding stability.

[0028] Specifically, the inner diameter wall at the top of the cylinder body 1 has a dustproof mounting groove 10, and a dustproof ring 7 is arranged between the dustproof mounting groove 10 and the plunger 2. Figure 5 As shown, the dust ring 7 of this embodiment includes an embedded section 7-1 and an axially extending elastic pressing section 7-2, the embedded section 7-1 is embedded in the dustproof installation groove 10, and the elastic pressing section 7-2 is pressed against the outer diameter wall of the plunger 2 to achieve sealing and dustproof, and prevent dust and other foreign matter from entering. Among them, along the axial direction from the embedded section 7-1 to the elastic pressing section 7-2, the inner diameter of the dust ring 7 decreases linearly, and the outer diameter of the elastic pressing section 7-2 decreases linearly. The minimum inner diameter of the elastic pressing section 7-2 is tightly matched with the outer diameter of the plunger 2, and the stability of the dust ring is ensured when the plunger is pressed down.

[0029] In addition, a sealing ring 8 is embedded in the inner diameter wall of the cylinder body 1, and the sealing ring 8 is in sealing contact with the plunger 2 to ensure the sealing of the inner cavity of the cylinder body 1 and the plunger 2; the top opening of the cylinder body 1 has an arc-shaped guide structure R to facilitate the installation of the plunger 2.

[0030] The spring seat 5 of this embodiment is installed at the bottom of the inner cavity of the plunger 2, and the spring seat 5 abuts on the bottom cover 2-1 of the plunger. A return spring 6 is arranged between the spring seat 5 and the top cover 2-2 of the plunger; the top of the throttle rod 3 abuts against the spring seat 5, so that when the plunger moves downward, the throttle rod abuts against the spring seat 5, thereby compressing the return spring 6.

[0031] The bottom cover 2-1 of the plunger of this embodiment has a throttle hole 21, and the bottom cover 2-1 of the plunger is embedded with a throttle ring 22 corresponding to the throttle hole 21 by riveting; specifically, an embedding groove is opened below the bottom cover 2-1 of the plunger, and the notch of the embedding groove has a convex ring T for riveting, and the throttle ring 22 is installed in the embedding groove through a sealing ring 23, and multi-point riveting is performed through the convex ring to limit the throttle ring 22 in the embedding groove. The spring seat 5 and the top cover of the plunger 2 respectively have a through hole 51 and an oil filling hole coaxial with the throttle hole; the oil dipstick 9 is inserted into the oil filling hole to the through hole 51 to detect the oil level. The oil dipstick 9 is detachably mounted on the side of the cylinder body 1, which is convenient for oil level detection; specifically, the oil dipstick 9 is a long rod structure, which is plugged into the support seat 12 fixed on the side of the cylinder body 1; in addition, the switch plate 13 extends vertically, with its top end fixed on the top of the plunger, and its bottom end passing through the support seat 12, which is used to trigger the travel switch 4. The bottom end of the switch plate 13 also has a limit bolt 130, which cooperates with the support seat 12 to limit the travel of the plunger reset and prevent the plunger from leaving the cylinder body.

[0032] The oil filling hole of this embodiment is provided with an oil filling plug 14 to prevent foreign matter from entering. In addition, a buffer pad 15 is provided on the top cover 2-2 of the plunger to improve the buffering performance of the buffer.

[0033] The above description is only a detailed description of the preferred embodiments and principles of the present invention. For ordinary technicians in this field, according to the ideas provided by the present invention, there will be changes in the specific implementation methods, and these changes should also be regarded as the protection scope of the present invention.

Claims

1. An elevator buffer, comprising a cylinder, a plunger and a throttle rod, wherein the throttle rod is arranged at the bottom of the cylinder, and the plunger is movably matched with the throttle rod, characterized in that: The inner diameter of the cylinder body is adapted to the outer diameter of the plunger so that the inner diameter wall of the cylinder body guides the plunger to rise or fall throughout the entire process; The bottom cover of the plunger is provided with a throttling hole, and a throttling ring corresponding to the throttling hole is embedded in the bottom cover of the plunger through riveting, and a sealing ring is arranged between the throttling ring and the bottom cover of the plunger.

2. The elevator buffer according to claim 1, characterized in that: The inner diameter wall at the top of the cylinder body is provided with a dustproof installation groove, and a dustproof ring is arranged between the dustproof installation groove and the plunger.

3. The elevator buffer according to claim 2, characterized in that: The dustproof ring comprises an embedding section and an elastic pressing section extending axially therefrom. The embedding section is embedded in the dustproof mounting groove, and the elastic pressing section is pressed against the outer diameter wall of the plunger.

4. The elevator buffer according to claim 3, characterized in that: Along the axial direction from the embedded section to the elastic pressing section, the inner diameter of the dustproof ring decreases linearly; the minimum inner diameter of the elastic pressing section is tightly matched with the outer diameter of the plunger.

5. The elevator buffer according to claim 1, characterized in that: The top opening of the cylinder body has an arc-shaped guiding structure.

6. The elevator buffer according to any one of claims 1 to 5, characterized in that: A sealing ring is embedded in the inner diameter wall of the cylinder body, and the sealing ring is in sealing contact with the plunger.

7. The elevator buffer according to any one of claims 1 to 5, characterized in that: A spring seat is arranged in the plunger, the spring seat abuts against the bottom cover of the plunger, a return spring is arranged between the spring seat and the top cover of the plunger; the top of the throttle rod abuts against the spring seat.

8. The elevator buffer according to claim 7, characterized in that: The top cover of the spring seat and the plunger respectively has a through hole and an oil filling hole coaxial with the throttle hole; an oil dipstick is inserted into the oil filling hole to detect the oil level.

9. The elevator buffer according to claim 8, characterized in that: The oil dipstick is detachably mounted on one side of the cylinder body.

10. The elevator buffer according to claim 8, characterized in that: The oil filling hole is provided with an oil filling plug, and a buffer pad is provided on the top cover of the plunger.

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