Elevator buffer
By using the design of the cylinder full-process guide plunger and built-in return spring in the elevator buffer, the problems of the rotation and overall height of the coil spring in the existing elevator buffer are solved, and a more stable and compact elevator buffer structure is achieved.
Patent Information
- Application Number
- CN202420744912.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-11
- Publication Date
- 2025-03-21
- Estimated Expiration
- 2034-04-11
AI Technical Summary
The existing elevator buffers are likely to cause the coil spring to rotate during the plunger downward process, affecting the stability of safety switch triggering and buffer reset, and at the same time, the overall height is higher due to the increase in guidance.
The design of the cylinder full-process guide plunger is adopted, and the limit and horizontal adjustment of the plunger is achieved through the combination of limit adjustment rod, bolt and nut, and the return spring is built into the plunger cavity to avoid its rotation.
The stability of the elevator buffer is improved, safety problems caused by the rotation of the coil spring is avoided, and the overall height is reduced by adjusting the level of the elevator buffer.
Smart Images
Figure CN222647363U_ABST
Abstract
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] Existing elevator buffers usually include an oil cylinder, a plunger and an adjusting rod, with a spiral spring outside or inside the plunger. During the actual plunger pressing process, the spiral spring is easily rotated, thereby affecting the safety switch triggering and the stability of the buffer reset. At the same time, as the height increases, the horizontality of the plunger buffer surface is ensured by adding a guide, resulting in a higher overall height of the elevator buffer. The present invention increases its stability by designing a cylinder body to guide the plunger throughout the entire process. 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 an oil cylinder, a plunger, an adjusting rod, a return spring, a switch rod and a safety switch, wherein the adjusting rod is coaxially installed in the oil cylinder, the bottom end of the plunger is sleeved in the oil cylinder and the plunger guide is matched with the oil cylinder, and the plunger is fully guided in the oil cylinder; a spring seat is provided at the bottom of the plunger inner cavity, the top end of the adjusting rod passes through the bottom end of the plunger to abut against the spring seat, the return spring is built into the plunger inner cavity and its two ends abut against the spring seat and the top cover of the plunger top respectively;
[0006] The elevator buffer also includes a limit adjustment rod, the top ends of the limit adjustment rod and the switch rod are fixedly installed on both sides of the top of the plunger, and the bottom ends of the limit adjustment rod and the switch rod respectively penetrate and flexibly fit the first lug and the second lug on both sides of the oil cylinder; the safety switch is installed on the oil cylinder corresponding to the bottom end of the switch rod;
[0007] The first lug is provided with a bolt and a nut, and the bolt axially penetrates the first lug and the threaded connection nut in sequence until it abuts against the horizontal bending portion of the limit adjustment rod; wherein the nut is locked under the first lug.
[0008] As a preferred solution, the plunger is a hollow cylindrical structure, the bottom end is a closed end, the top end is an open end, and the top cover is closed on the open end;
[0009] The end surface of the closed end has a groove, and the groove of the closed end is provided with a flow port, and the flow port penetrates to the inner cavity of the plunger;
[0010] The groove at the closed end is provided with a throttling ring, and the inner diameter of the throttling ring is smaller than the diameter of the flow port.
[0011] As a preferred solution, a sealing ring is provided between the throttling ring and the groove at the closed end.
[0012] As a preferred solution, the throttling ring is limited in the groove of the closed end of the plunger by an annular pressure seat, and the annular pressure seat is fixedly mounted on the plunger;
[0013] The throttling ring, the plunger and the annular pressure seat are coaxial, and the flow port, the inner diameter port of the throttling ring and the inner diameter port of the annular pressure seat are coaxial.
[0014] As a preferred solution, the spring seat has a through hole for connecting the chamber above the spring seat and the chamber below the spring seat.
[0015] As a preferred solution, the spring seat is a trumpet structure, and a plurality of through holes are evenly distributed along the circumference of the expanded portion of the trumpet structure.
[0016] As a preferred solution, the top cover has an oil filling hole, and the oil filling hole is provided with a sealing screw.
[0017] As a preferred solution, a buffer pad is provided on the top cover.
[0018] Compared with the prior art, the utility model has the following beneficial effects:
[0019] (1) The utility model utilizes a combination design of a limit adjustment rod, a bolt and a nut, which can not only realize the limit of the plunger, but also adjust the horizontality of the elevator buffer through the bolt;
[0020] (2) The internal design of the reset spring sampling of the utility model can avoid the situation where the reset spring is easily rotated when it is externally placed, and the stability of triggering the safety switch is better. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 It is a structural schematic diagram of an elevator buffer according to Embodiment 1 of the present utility model;
[0022] Figure 2 It is a structural schematic diagram of the elevator buffer of Embodiment 1 of the utility model from another perspective;
[0023] Figure 3 yes Figure 2 AA section view in the figure;
[0024] Figure 4 yes Figure 2 A magnified view of part B in FIG.
[0025] Figure 5 yes Figure 3 The enlarged view of the C part in FIG.
[0026] Figure 6 yes Figure 3 The enlarged view of the D part in FIG.
[0027] Figure 7 It is a structural schematic diagram of the spring seat of Example 1 of the utility model. DETAILED DESCRIPTION
[0028] 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.
[0029] Embodiment 1:
[0030] like Figure 1-7 As shown, the elevator buffer of this embodiment includes a base 0, a cylinder 1, an adjusting rod 2, a plunger 3, a return spring 4, a limit adjustment rod 5, a switch rod 6 and a safety switch 7.
[0031] Specifically, the bottom end of the oil cylinder 1 is fixedly mounted (e.g., welded) on the base 0, and the oil cylinder 1 includes a main section 1-1 and a connecting section 1-2 located above the main section. The inner diameters of the main section 1-1 and the connecting section 1-2 are the same and matched with the outer diameter of the plunger 3, thereby guiding the lifting and lowering activities of the plunger 3.
[0032] The adjusting rod 2 of this embodiment is coaxially installed in the oil cylinder 1, the bottom end of the adjusting rod 2 is fixed to the bottom of the oil cylinder 1, and the top end of the adjusting rod 2 extends to the connecting section 1-2.
[0033] The plunger 3 of this embodiment is a hollow cylindrical structure, with a closed bottom end and an open top end, and the open end is covered with a top cover 8; the end surface of the closed end has a groove K formed by spinning, which is used to install a throttle ring. Specifically, the circular flat plate is first spun in the opposite direction at the beginning of spinning to form the groove K, and then spun in the opposite direction to obtain the main structure of the plunger.
[0034] The groove K at the closed end of the plunger 3 of this embodiment is provided with an overflow port K1, which passes through the inner cavity of the plunger, and the overflow port K1 is coaxial with the plunger 3. In addition, a throttling ring 9 is installed in the groove K at the closed end of the plunger 3, and the inner diameter of the throttling ring 9 is smaller than the diameter of the overflow port 2. Among them, a sealing ring 10 is provided between the throttling ring 9 and the groove at the closed end of the plunger to ensure the sealing; the throttling ring 9 is limited and fixed in the groove K at the closed end of the plunger by an annular pressure seat 11, and the annular pressure seat 11 is fixedly installed below the closed end of the plunger. The fixed installation method, such as welding, screw connection, etc., is used to prevent the throttling ring 9 from falling off.
[0035] The throttling ring 9, the plunger 3 and the annular pressure seat 11 of this embodiment are coaxial, and the flow port K1 and the throttling ring 9 realize variable throttling cross-section through the adjusting rod to avoid the friction between the flow port and the adjusting rod, thereby realizing the internal and external connection of the plunger and realizing throttling.
[0036] The bottom end of the plunger 3 of this embodiment is sleeved in the junction section 1-2 of the oil cylinder 1 and the plunger 3 guide is matched with the oil cylinder 1, and the plunger 3 is fully guided during the buffering process. The bottom of the inner cavity of the plunger 3 is provided with a spring seat 12, and the top end of the adjustment rod 2 passes through the annular pressure seat 11 at the bottom end of the plunger and the throttle ring 9 to abut against the spring seat 12. The return spring 4 is built into the inner cavity of the plunger and its two ends are respectively abutted against the spring seat 12 and the top cover 8 at the top end of the plunger. Among them, a sealing ring 13 is provided between the oil cylinder 1 and the plunger 3, and accordingly, a sealing ring groove is provided on the inner wall of the junction section 1-2 of the oil cylinder, and a sealing ring 13 is installed in the sealing ring groove.
[0037] The spring seat 12 of this embodiment has a through hole 120 for connecting the chamber above the spring seat 12 and the chamber below the spring seat 12. Specifically, the spring seat 12 is a trumpet structure, and a plurality of through holes 120 are evenly distributed along the circumference of the expanded portion of the trumpet structure. In addition, the top cover 8 of this embodiment has an oil filling hole, and the oil filling hole is provided with a sealing screw 14.
[0038] The top ends of the limit adjustment rod 5 and the switch rod 6 of this embodiment are fixedly mounted on both sides of the top of the plunger, and the bottom ends of the limit adjustment rod 5 and the switch rod 6 respectively penetrate and flexibly fit into the guide grooves of the left lug 1a and the right lug 1b on both sides of the cylinder 1; the safety switch 7 is mounted on the cylinder 1 corresponding to the bottom end of the switch rod 6, for example, it can be mounted on the right lug 1b.
[0039] The left lug 1a is provided with a bolt 16 and a nut 17, wherein the bolt 16 axially penetrates the left lug 1a and is threadedly connected to the nut 17 until it abuts against the horizontal bending portion 5a of the limit adjustment rod 5; wherein the nut 17 is locked under the left lug 1a to achieve the horizontal adjustment of the plunger and the limit of the plunger reset. wherein a spring washer 18 is provided between the nut 17 and the left lug 1a.
[0040] In this embodiment, a buffer pad 19 is provided on the top cover 8 to buffer impact.
[0041] Embodiment 2:
[0042] The difference between the elevator buffer of this embodiment and the embodiment 1 is that:
[0043] It can also be partially guided instead of fully guided to meet the needs of different applications;
[0044] For other structures, please refer to Example 1.
[0045] Embodiment 3:
[0046] The difference between the elevator buffer of this embodiment and the embodiment 1 is that:
[0047] The design of the plunger and throttle ring can be replaced by existing conventional designs to meet the needs of different applications;
[0048] For other structures, please refer to Example 1.
[0049] 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, an adjusting rod, a return spring, a switch lever and a safety switch, characterized in that: The adjusting rod is coaxially installed in the oil cylinder, the bottom end of the plunger is sleeved in the oil cylinder and the plunger guide is matched with the oil cylinder; a spring seat is provided at the bottom of the plunger inner cavity, the top end of the adjusting rod passes through the bottom end of the plunger to abut against the spring seat, the return spring is built into the plunger inner cavity and its two ends abut against the spring seat and the top cover of the plunger top respectively; The elevator buffer also includes a limit adjustment rod, the top ends of the limit adjustment rod and the switch rod are fixedly installed on both sides of the top of the plunger, and the bottom ends of the limit adjustment rod and the switch rod respectively penetrate and flexibly fit the first lug and the second lug on both sides of the oil cylinder; the safety switch is installed on the oil cylinder corresponding to the bottom end of the switch rod; The first lug is provided with a bolt and a nut, and the bolt axially penetrates the first lug and the threaded connection nut in sequence until it abuts against the horizontal bending portion of the limit adjustment rod; wherein the nut is locked under the first lug.
2. The elevator buffer according to claim 1, characterized in that: The plunger is a hollow cylindrical structure, the bottom end is a closed end, the top end is an open end, and the top cover is closed on the open end; The end surface of the closed end has a groove, and the groove of the closed end is provided with a flow port, and the flow port penetrates to the inner cavity of the plunger; The groove at the closed end is provided with a throttling ring, and the inner diameter of the throttling ring is smaller than the diameter of the flow port.
3. The elevator buffer according to claim 2, characterized in that: A sealing ring is arranged between the throttling ring and the groove at the closed end.
4. The elevator buffer according to claim 3, characterized in that: The throttling ring is limited in the groove of the closed end of the plunger by an annular pressure seat, and the annular pressure seat is fixedly installed on the plunger; The throttling ring, the plunger and the annular pressure seat are coaxial, and the flow port, the inner diameter port of the throttling ring and the inner diameter port of the annular pressure seat are coaxial.
5. The elevator buffer according to any one of claims 1 to 4, characterized in that: The spring seat has a through hole for connecting the chamber above the spring seat and the chamber below the spring seat.
6. The elevator buffer according to any one of claims 1 to 4, characterized in that: The spring seat is a trumpet structure, and a plurality of through holes are evenly distributed along the circumference of the expanded portion of the trumpet structure.
7. The elevator buffer according to any one of claims 1 to 4, characterized in that: The top cover is provided with an oil filling hole, and a sealing screw is provided in the oil filling hole.
8. The elevator buffer according to any one of claims 1 to 4, characterized in that: A buffer pad is arranged on the top cover.