Elevator anti-fall speed differential

Abstract

The present invention discloses an elevator anti-fall speed differential, comprising a first cover shell and a second cover shell, wherein the first cover shell is provided with a first axial hole, and the second cover shell is provided with a second axial hole, and the characteristic is that: a main shaft is provided between the first axial hole and the second axial hole, a driving wheel and a driven wheel are provided on the main shaft, a centrifugal drive assembly and a driven wheel limit plate are provided between the driving wheel and the driven wheel, the main shaft passes through the centrifugal drive assembly and the driven wheel limit plate, the driven wheel limit plate is fixedly connected to the driven wheel, and the centrifugal drive assembly drives the driven wheel limit plate. The present invention adopts a purely mechanical structure and utilizes the principle of centrifugal force to achieve the effect of not being affected by an external power supply, a short effective braking distance (25-30cm), convenient maintenance and replacement, and greatly saves costs.

Description

Technical Field

[0001] The invention relates to an elevator structure, more specifically, to an elevator anti-fall speed differential device. Background Art

[0002] Today's elevators are controlled by electronic components, which have a short service life, are complex to inspect and test, are difficult to control when they are out of power, are costly, and have insensitive braking response speeds. Summary of the invention

[0003] The present invention mainly solves the technical problems existing in the prior art, thereby providing an elevator anti-fall speed differential.

[0004] The above technical problems of the present invention are mainly solved by the following technical solutions:

[0005] An elevator anti-fall speed differential comprises a first cover shell and a second cover shell, the first cover shell is provided with a first axial hole, the second cover shell is provided with a second axial hole, and the characteristic is that a main shaft is provided between the first axial hole and the second axial hole, a driving wheel and a driven wheel are provided on the main shaft, a centrifugal drive assembly and a driven wheel limiting plate are provided between the driving wheel and the driven wheel, the main shaft passes through the centrifugal drive assembly and the driven wheel limiting plate, the driven wheel limiting plate is fixedly connected to the driven wheel, and the centrifugal drive assembly drives the driven wheel limiting plate.

[0006] As a preferred embodiment of the present invention: the centrifugal drive assembly comprises a pair of limit blocks and a driven wheel bearing limit plate, and a pair of limit block springs are arranged between the limit blocks.

[0007] As a preferred embodiment of the present invention: a spring hole is respectively provided at both ends of the main shaft, a screw through hole is respectively provided on both sides of the first cover shell, a main screw passes through the spring hole and the screw through hole, and a main spring and a plurality of main nuts are provided on the main screw.

[0008] As a preferred embodiment of the present invention: the limit block comprises a teardrop-shaped limit body, the head of the limit body is provided with a penetrating rotating shaft cylinder and a spring connecting flange, a driving wheel sleeve is provided in the rotating shaft cylinder, a spring connecting flange through hole is provided on the spring connecting flange, a spring connecting concave platform and a locking slot are provided at the tail of the limit body, a spring connecting concave platform through hole is provided on the spring connecting concave platform, the spring connecting concave platform through hole and the spring connecting flange through hole cooperate with the limit block spring, a first center hole is provided at the center of the driven wheel bearing limit plate, and a first center secondary hole is provided on both sides of the first center hole.

[0009] As a preferred embodiment of the present invention: a driving wheel center hole is provided at the center of the driving wheel, and a driving wheel pair connecting hole is provided on both sides of the driving wheel center hole;

[0010] The driven wheel limiting piece comprises an annular driven wheel limiting ring body, the inner side wall of the driven wheel limiting ring body is provided with four locking protrusions, the locking protrusions cooperate with the locking slots, the outer side wall of the driven wheel limiting ring body is provided with four ring body flanges, and the ring body flange is provided with a ring body flange through hole;

[0011] A driven wheel center roller is provided at the center of the driven wheel, and four driven wheel pair connecting holes are provided at the circumferential edge of the driven wheel;

[0012] The main shaft is provided with a first rolling bearing and a second rolling bearing, a first plane bearing is provided on the outer side of the first rolling bearing, a second plane bearing is provided on the outer side of the second rolling bearing, the first rolling bearing is matched with the central hole of the driving wheel, the second rolling bearing is matched with the central roller of the driven wheel, the first plane bearing abuts against the inner end surface of the first shaft hole, and the second plane bearing abuts against the inner end surface of the second shaft hole;

[0013] Among them, a pair of driving wheel anti-retraction bolts sequentially penetrate the driving wheel pair connection hole, the driving wheel shaft sleeve and the first central pair hole, and are connected with a pair of driving wheel nuts;

[0014] The four driven wheel bolts sequentially penetrate the driven wheel pair connecting hole, the driven wheel shaft sleeve and the ring body flange through hole, and are connected with the four driven wheel anti-retraction nuts.

[0015] The elevator anti-fall speed differential of the present invention has the following advantages: the present invention adopts a purely mechanical structure and utilizes the centrifugal force principle to achieve no influence from external power supply, short effective braking distance (25-30cm), convenient maintenance and replacement, and greatly saves costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the elevator anti-fall speed differential device of the present invention;

[0018] Figure 2 for Figure 1Schematic diagram of the three-dimensional structure of the elevator anti-fall speed differential device;

[0019] Figure 3 for Figure 2 A further schematic diagram of the three-dimensional structure decomposition of the elevator anti-fall speed differential device;

[0020] Figure 4 for Figure 3 Schematic diagram of the three-dimensional structure of the driven wheel limiter of the elevator anti-fall speed differential;

[0021] Figure 5 for Figure 3 A schematic diagram of the three-dimensional structure of the driven wheel of the elevator anti-fall speed differential;

[0022] Figure 6 for Figure 3 A further schematic diagram of the three-dimensional structure decomposition of the centrifugal drive assembly;

[0023] Figure 7 for Figure 6 A detailed enlarged schematic diagram of area A in FIG.

[0024] Figure 8 This is a schematic diagram of the use of the elevator anti-fall speed differential device of the present invention, in which the limit block clamps the driven wheel limit plate;

[0025] Fig. 9 for Figure 8 A detailed enlarged schematic diagram of the B area;

[0026] Fig.10 This is a schematic cross-sectional structure diagram of the elevator anti-fall speed differential device of the present invention, in which the first cover shell and the second cover shell are omitted. DETAILED DESCRIPTION

[0027] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0028] like Figures 1 to 6 As shown, the elevator anti-fall speed differential includes a first cover shell 4 and a second cover shell 22, the first cover shell 4 is provided with a first axial hole 41, the second cover shell 22 is provided with a second axial hole 221, a main shaft 2 is provided between the first axial hole 41 and the second axial hole 221, the main shaft 2 is provided with a driving wheel 14 and a driven wheel 8, a centrifugal drive component K and a driven wheel limiting plate 12 are provided between the driving wheel 14 and the driven wheel 8, the main shaft 2 passes through the centrifugal drive component K and the driven wheel limiting plate 12, the driven wheel limiting plate 12 is fixedly connected to the driven wheel 8, and the centrifugal drive component K drives the driven wheel limiting plate 12.

[0029] A driving wheel center hole 140 is formed at the center of the driving wheel 14 , and driving wheel pair connecting holes 141 are formed on both sides of the driving wheel center hole 140 .

[0030] The centrifugal drive assembly K comprises a pair of limit blocks 21 and a driven wheel bearing limit plate 19, a pair of limit block springs 23 are arranged between the limit blocks 21,

[0031] A spring hole 200 is respectively provided at both ends of the main shaft 2, a screw through hole 42 is respectively provided at both sides of the first cover shell 4, a main screw 3 passes through the spring hole 200 and the screw through hole 42, and a main spring 1 and a plurality of main nuts 31 are provided on the main screw 3.

[0032] The limit block 21 includes a teardrop-shaped limit body 210, the head of the limit body 210 is provided with a penetrating rotating shaft cylinder 211 and a spring connecting flange 212, a driving wheel sleeve 20 is provided in the rotating shaft cylinder 211, a spring connecting flange through hole 213 is provided on the spring connecting flange 212, a spring connecting recess 214 and a locking slot 216 are provided at the tail of the limit body 210, a spring connecting recess 214 is provided with a spring connecting recess through hole 215, the spring connecting recess through hole 215 and the spring connecting flange through hole 213 cooperate with the limit block spring 23, a first center hole 191 is provided at the center of the driven wheel bearing limit plate 19, and a first center auxiliary hole 192 is provided on both sides of the first center hole 191.

[0033] The driven wheel limiting plate 12 includes an annular driven wheel limiting ring body 121, and four locking protrusions 122 are provided on the inner side wall of the driven wheel limiting ring body 121, and the locking protrusions 122 cooperate with the locking grooves 216, and four ring body flanges 123 are provided on the outer side wall of the driven wheel limiting ring body 121, and a ring body flange through hole 124 is provided on the ring body flange 123.

[0034] A driven wheel center roller 81 is disposed at the center of the driven wheel 8 , and four driven wheel pair connecting holes 82 are disposed at the circumferential edge of the driven wheel 8 .

[0035] The main shaft 2 is provided with a first rolling bearing 71 and a second rolling bearing 72. A first plane bearing 51 is provided on the outer side of the first rolling bearing 71, and a second plane bearing 52 is provided on the outer side of the second rolling bearing 72. The first rolling bearing 71 matches with the center hole 140 of the driving wheel, and the second rolling bearing 72 matches with the center roller 81 of the driven wheel. The first plane bearing 51 abuts against the inner end surface of the first shaft hole 41, and the second plane bearing 52 abuts against the inner end surface of the second shaft hole 221. It should be noted that the first rolling bearing 71, the second rolling bearing 72, the first plane bearing 51 and the second plane bearing 52 are all fixed to the main shaft 2 by a retaining spring.

[0036] A pair of driving wheel anti-retraction bolts 16 sequentially penetrate the driving wheel pair connection hole 141, the driving wheel sleeve 20 and the first center secondary hole 192, and are connected to a pair of driving wheel nuts 9. Four driven wheel bolts 10 sequentially penetrate the driven wheel pair connection hole 82, the driven wheel sleeve 11 and the ring body flange through hole 124, and are connected to four driven wheel anti-retraction nuts 13.

[0037] The operation mode of the elevator anti-fall speed differential device is described below.

[0038] When the elevator is operating normally, the driving wheel 14 rotates and moves along the elevator guide rail and monitors the running speed in real time. During the elevator ascending process, the elevator anti-fall speed differential will not be effective. Once the elevator stalls during the descending process, the speed of the driving wheel 14 exceeds the preset value, so the high-speed rotating driving wheel 14 generates centrifugal force, which throws out a pair of limit blocks 21 in the centrifugal drive assembly K. As a result, the locking groove 216 of the limit block 21 quickly clamps the locking protrusion 122 of the driven wheel limit plate 12, as shown in FIG. Figure 7 and Figure 8 As shown. Then, the driven wheel limit plate 12 directly drives the driven wheel 8 to rotate. The driven wheel center roller 81 of the driven wheel 8 cooperates to pull the connecting wire rope, thereby triggering the action of the safety clamp. When the danger is eliminated, the pair of limit blocks 21 are reset under the action of the limit block spring 23, and the driving wheel 14 resumes normal working state.

[0039] The elevator anti-fall speed differential can effectively monitor the elevator's downward speed in real time, and control the falling distance through a mechanical structure, solving the problems of difficult installation space and long braking reaction distance of anti-fall devices for small elevators and low-floor elevators, and also solving the problems of false operation and non-operation caused by power failure, malfunction and failure of electronic components, greatly improving the personal and property safety of small elevators and low-floor elevators.

[0040] Without limitation to this, any changes or substitutions that are not conceived through creative work should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope defined in the claims.

Claims

1. An elevator anti-fall speed differential device, comprising a first cover shell (4) and a second cover shell (22), wherein the first cover shell (4) is provided with a first shaft hole (41), and the second cover shell (22) is provided with a second shaft hole (221), characterized in that: A main shaft (2) is provided between the first shaft hole (41) and the second shaft hole (221); a driving wheel (14) and a driven wheel (8) are provided on the main shaft (2); a centrifugal drive assembly (K) and a driven wheel limiting plate (12) are provided between the driving wheel (14) and the driven wheel (8); the main shaft (2) passes through the centrifugal drive assembly (K) and the driven wheel limiting plate (12); the driven wheel limiting plate (12) is fixedly connected to the driven wheel (8); the centrifugal drive assembly (K) drives the driven wheel limiting plate (12); the centrifugal drive assembly (K) comprises a pair of limiting blocks (21) and a driven wheel bearing limiting plate The plate (19) is provided with a pair of limit block springs (23) between the limit blocks (21), the two ends of the main shaft (2) are respectively provided with a spring hole (200), the two sides of the first cover shell (4) are respectively provided with a screw through hole (42), a main screw (3) passes through the spring hole (200) and the screw through hole (42), the main screw (3) is provided with a main spring (1) and a plurality of main nuts (31), the limit block (21) comprises a water drop-shaped limit body (210), the head of the limit body (210) is provided with a penetrating rotating shaft cylinder (211) and a spring connecting flange (212), the rotating shaft cylinder (211) A driving wheel shaft sleeve (20) is provided inside, a spring connection flange (212) is provided with a spring connection flange through hole (213), a spring connection concave platform (214) and a locking slot (216) are provided at the tail of the limiting body (210), a spring connection concave platform through hole (215) is provided on the spring connection concave platform (214), the spring connection concave platform through hole (215) and the spring connection flange through hole (213) are matched with the limiting block spring (23), a first center hole (191) is provided at the center of the driven wheel bearing limiting plate (19), and first center secondary holes (192) are respectively provided on both sides of the first center hole (191), a driving wheel center hole (140) is provided at the center of the driving wheel (14), and a driving wheel secondary connection hole (141) is respectively provided on both sides of the driving wheel center hole (140); The driven wheel limiting plate (12) comprises an annular driven wheel limiting ring body (121), the inner side wall of the driven wheel limiting ring body (121) is provided with four locking protrusions (122), the locking protrusions (122) cooperate with the locking grooves (216), the outer side wall of the driven wheel limiting ring body (121) is provided with four ring body flanges (123), and the ring body flange (123) is provided with a ring body flange through hole (124); A driven wheel center roller (81) is provided at the center of the driven wheel (8), and four driven wheel pair connection holes (82) are provided at the circumferential edge of the driven wheel (8); The main shaft (2) is provided with a first rolling bearing (71) and a second rolling bearing (72); a first plane bearing (51) is provided on the outer side of the first rolling bearing (71); a second plane bearing (52) is provided on the outer side of the second rolling bearing (72); the first rolling bearing (71) matches with the central hole (140) of the driving wheel; the second rolling bearing (72) matches with the central roller (81) of the driven wheel; the first plane bearing (51) abuts against the inner end surface of the first shaft hole (41); and the second plane bearing (52) abuts against the inner end surface of the second shaft hole (221); The four driven wheel bolts (10) sequentially penetrate the driven wheel pair connection hole (82), the driven wheel shaft sleeve (11) and the ring body flange through hole (124), and are connected to the four driven wheel anti-retraction nuts (13).

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