CN108275532B

CN108275532B - Elevator speed limiter

Info

Publication number: CN108275532B
Application number: CN201810180157.5A
Authority: CN
Inventors: 本村和彦; 胡永刚
Original assignee: Suzhou Puletai Automatic Control Technology Co ltd
Current assignee: Suzhou Puletai Automatic Control Technology Co ltd
Priority date: 2018-03-05
Filing date: 2018-03-05
Publication date: 2023-06-30
Anticipated expiration: 2038-03-05
Also published as: CN108275532A

Abstract

The invention discloses an elevator speed limiter, which comprises a bracket, wherein a speed limiter switch is arranged at the upper part of the bracket, a rope pulley component is arranged in the bracket, a braking component is arranged at one side of the rope pulley component, the braking component comprises a compression spring, the lower end of the compression spring is fixed on a bottom plate, a pawl is arranged at the upper end of the compression spring, the elevator speed limiter further comprises a brake shoe, a brake shoe shaft and a brake shaft, the pawl is arranged on the brake shaft, the brake shoe is arranged on the brake shoe shaft and the brake shaft, the elevator speed limiter further comprises a stop block component hinged on a side wall, and a pituitary component is further arranged in the rope pulley mechanism.

Description

Elevator speed limiter

Technical Field

The invention relates to a speed limiter for an elevator, in particular to an elevator speed limiter.

Background

The elevator speed limiter is one of safety control components in an elevator safety protection system, when an elevator is in overspeed or even falls in any reason during operation, and under the condition that all other safety protection devices do not work, the speed limiter and the safety tongs perform linkage action to stop the elevator car, and the elevator speed limiter disclosed in China patent 201210552798.1 is used in the current market and has the following structure: the elevator comprises a machine base, a rope pulley, a centrifugal hammer, a ratchet wheel, a pawl, a braking device and a manual triggering device, wherein the machine base is of a U-shaped structure, the rope pulley is pivoted on the machine base through a rope pulley shaft, a steel wire rope bypasses the rope pulley, one end of the steel wire rope is connected with an elevator car, the centrifugal hammer is symmetrically and rotatably pivoted on the rope pulley through the centrifugal hammer shaft, an electric switch is further arranged on the machine base, a striking plate is arranged on the electric switch, an electric switch firing pin is arranged on the centrifugal hammer, the pawl is rotatably and coaxially arranged on the rope pulley with the centrifugal hammer, the pawl is kept to be actuated through a screw and the centrifugal hammer, and the pawl always keeps the trend of being staggered with the ratchet wheel when being actuated by a reset elastic element; one end of the braking device is pivoted on the ratchet wheel, and the other end of the braking device is pivoted on the machine base. The braking device comprises a braking block, a braking shaft, a rope pressing support shaft, a braking spring and a switch trigger handle, wherein the rope pressing support is rotatably arranged on a machine base through the rope pressing support shaft, the braking block is arranged on the rope pressing support through the braking shaft, one end of the switch trigger handle is pivoted on a ratchet wheel, the other end of the switch trigger handle penetrates through a hole on the rope pressing support far away from one end of the machine base and then stretches out, the braking spring is arranged on the stretching part through a nut, one end of the braking spring is contacted with the rope pressing support, the other end of the braking spring is contacted with the nut of the switch trigger handle, the braking device in the speed limiter is obliquely arranged, the structure is complex, the occupied space is large, and a large space needs to be reserved when the speed limiter is arranged, so that the situation that the speed limiter cannot be arranged can occur when the elevator space is insufficient.

Disclosure of Invention

The invention solves the technical problem of providing the elevator speed limiter with good performance and small structure.

The technical scheme adopted for solving the technical problems is as follows: the utility model provides an elevator overspeed governor, includes the support, installs the overspeed governor switch in support upper portion, the support includes bottom plate and lateral wall, be provided with rope sheave subassembly in the support, rope sheave subassembly is including being used for around wire rope's rope sheave mechanism and ratchet, rope sheave subassembly one side is provided with brake subassembly, brake subassembly includes the compression spring of perpendicular setting, compression spring's lower extreme is fixed on the bottom plate, but ratchet's pawl is installed to compression spring's upper end, pawl lower part is provided with the third through-hole, still includes the brake shoe, brake shoe upper portion is provided with first kidney-shaped hole, brake shoe lower part is provided with the third kidney-shaped hole, the lateral wall that is located brake subassembly department is provided with the second through-hole that is located upper portion and the second kidney-shaped hole that is located the lower part, still includes to pass second through Kong Zhidong tile axle and pass second kidney-shaped hole brake shoe axle, the pawl is installed on the brake axle through the third kidney-shaped hole, first kidney-shaped hole is installed on the brake shoe axle, first kidney-shaped hole is passed through the brake shoe and is provided with the brake subassembly in order to trigger the brake shoe, the brake subassembly is still provided with braking stop force in the brake subassembly to the operation of hinging.

Further is: the pituitary assembly comprises a first pituitary assembly and a second pituitary assembly, the first pituitary assembly comprises a first pituitary support, one end of the first pituitary support is hinged with the rope wheel assembly, the other end of the first pituitary support is provided with a first pituitary, one side of the first pituitary is provided with a first rod which can be contacted with the stop block assembly, and the other side of the first pituitary is provided with a first connecting shaft which passes through the first pituitary support;

the second pituitary assembly comprises a second pituitary support, one end of the second pituitary support is hinged with the rope wheel assembly, the other end of the second pituitary support is provided with a second pituitary, one side of the second pituitary is provided with a second driving rod which can be contacted with the stop block assembly, the other side of the second pituitary is provided with a second linkage shaft which penetrates through the second pituitary support, and the first pituitary assembly and the second pituitary assembly are further provided with a spring mechanism for controlling the movement radius of the first pituitary assembly and the second pituitary assembly.

Further is: the rope pulley assembly is characterized by further comprising a connecting rod, the middle part of the connecting rod is installed in the middle of the rope pulley assembly through a bearing and synchronously rotates along with the rope pulley assembly, kidney-shaped limiting holes are formed in two ends of the connecting rod, and the two kidney-shaped limiting holes are respectively sleeved on the first connecting shaft and the second connecting shaft.

Further is: the spring mechanism also comprises a screw rod, a spring stop block is arranged on one side of the second pituitary body support close to the second pituitary body, a spring penetrating hole is arranged in the spring stop block, one end of the screw rod is arranged at the hinge joint of the first pituitary body support and the rope pulley component through a fixed copper block, the other end of the screw rod penetrates through the spring penetrating hole, two spring fixing washers are arranged at one end of the screw rod penetrating through the spring stop block, and the spring is sleeved on the screw rod and located between the two spring fixing washers.

Further is: the stop assembly comprises a stop body, the middle of the stop body is hinged to the side wall of the support, one end of the stop assembly is provided with a glass bead screw which is in contact with the pawl and used for blocking the pawl, and the other end of the stop assembly is provided with a set screw which is used for receiving external rotation force of the pituitary assembly.

The beneficial effects of the invention are as follows: according to the elevator speed limiter, the compression spring is designed to be of a vertical structure, and the braking structure can realize the braking action on the rope pulley assembly only by occupying a small space on one side of the rope pulley assembly through the linkage design of the compression spring, the brake tile shaft and the pawl, so that the occupied space of the elevator speed limiter is greatly reduced, and the elevator speed limiter can adapt to the use of the small space.

Drawings

Fig. 1 is a schematic diagram of an elevator governor.

Fig. 2 is an exploded view of an elevator governor.

Fig. 3 is a schematic view of a stent.

Fig. 4 is a schematic diagram of a sheave mechanism.

Fig. 5 is a schematic view of a first pituitary assembly.

Fig. 6 is a schematic diagram of a second pituitary assembly.

Fig. 7 is a schematic view of a spring mechanism.

FIG. 8 is a schematic diagram of block components.

Marked in the figure as: the brake shoe comprises a bracket 1, a speed limiter switch 2, a rope pulley mechanism 3, a ratchet mechanism 4, a compression spring 5, a pawl 6, a third through hole 7, a brake shoe 8, a first kidney hole 9, a third kidney hole 10, a second through hole 11, a second kidney hole 12, a brake shoe shaft 13, a brake shaft 14, a stop assembly 15, a stop body 151, a bead screw 152, a set screw 153, a first pituitary assembly 16, a first pituitary bracket 161, a first pituitary 162, a first lever 163, a first linkage shaft 164, a second pituitary assembly 17, a second pituitary bracket 171, a second pituitary 172, a second lever 173, a second linkage shaft 174, a spring stop 175, a spring mechanism 18, a screw 181, a fixed copper block 182, a spring fixing washer 183, a spring 184, a connecting rod 19, and a kidney-shaped limiting hole 20.

Detailed Description

The invention is further described below with reference to the drawings and the detailed description.

An elevator speed limiter as shown in fig. 1 and 2 comprises a bracket 1, wherein a speed limiter switch 2 is arranged at the upper part of the bracket 1, the speed limiter switch 2 is arranged on the bracket 1 through screws and nuts, the bracket 1 comprises a bottom plate and side walls, a rope pulley component is arranged in the bracket 1 and comprises a rope pulley mechanism 3 and a ratchet mechanism 4 which are used for winding a steel wire rope, one side of the rope pulley component is provided with a brake component, the brake component comprises a compression spring 5 which is vertically arranged, the lower end of the compression spring 5 is fixed on the bottom plate through a link bracket 1, a pawl 6 which can be clamped into the ratchet mechanism 4 is arranged at the upper end of the compression spring 5, a third through hole 7 is arranged at the lower part of the pawl 6, a brake shoe 8 is obliquely arranged at the upper part of the brake shoe 8, a third waist-shaped hole 10 is arranged at the lower part of the brake shoe 8, the side wall of the brake component is provided with a second through hole 11 at the upper part and a second kidney-shaped hole 12 at the lower part, the brake component further comprises a brake shoe shaft 13 penetrating through the second through hole 11 and a brake shaft 14 penetrating through the second kidney-shaped hole 12, the pawl 6 is arranged on the brake shaft 14 through a third through hole 7, the brake shoe 8 is arranged on the brake shoe shaft 13 through a third kidney-shaped hole 10, the first kidney-shaped hole 9 penetrates through the brake shoe shaft 13, the upper part of the brake shoe shaft 13 moves towards the rope wheel mechanism 3 when the brake shoe shaft 13 moves from the lower part of the first kidney-shaped hole 9 to the upper part of the first kidney-shaped hole 9, the brake component 15 hinged on the side wall and used for triggering the brake component to perform braking operation is further arranged in the rope wheel mechanism 3, the working principle of the elevator speed limiter is as follows: when the elevator reaches the speed limit of the speed limiter, the descending speed of the elevator is increased, so that the rotating speed of the rope pulley assembly is increased, namely the centrifugal force borne by the pituitary assembly is increased, the movement radius of the pituitary assembly is increased, the pituitary assembly firstly collides with the speed limiter switch 2, the power supply of the elevator is cut off, the traction machine brake acts, and the elevator is stopped; if the action of a traction machine brake is not timely or invalid, the pituitary assembly continuously rotates to the stop assembly 15, so that the stop assembly 15 rotates, the stop assembly 15 loses the blocking force to the pawl 6, the pawl 6 is clamped into the ratchet mechanism 4 under the driving of the compression spring 5, at the moment, the ratchet mechanism 4 still continuously rotates downwards for a certain distance along with the rope pulley mechanism 3, so that the pawl 6 drives the compression spring 5 to downwards press, and simultaneously drives the brake shaft 14 to move to the lower part of the second kidney-shaped hole 12 during the downwards pressing, so that the brake shoe 8 is arranged on the brake shaft 14 through the third kidney-shaped hole 10, thereby the lower end of the brake shoe 8 moves downwards along with the downward movement, so that the upper part of the brake shoe 8 moves towards the rope pulley assembly under the limit of the first kidney-shaped hole 9, and a steel wire rope in the rope pulley assembly is clamped, so as to play a braking role.

On the basis of the above, as shown in fig. 4 to 6, the pituitary assembly comprises a first pituitary assembly 16 and a second pituitary assembly 17, the first pituitary assembly 16 comprises a first pituitary support 161, one end of the first pituitary support 161 is hinged with the rope pulley assembly, the other end of the first pituitary support 161 is provided with a first pituitary 162, one side of the first pituitary 162 is provided with a first beating rod 163 which can be contacted with the stop assembly 15, and the other side of the first pituitary 162 is provided with a first connecting shaft 164 which passes through the first pituitary support 161; the second pituitary assembly 17 comprises a second pituitary support 171, one end of the second pituitary support 171 is hinged with the rope wheel assembly, the other end of the second pituitary support 171 is provided with a second pituitary 172, one side of the second pituitary 172 is provided with a second beating rod 173 which can be contacted with the stop assembly 15, the other side of the second pituitary 172 is provided with a second linkage shaft 174 which passes through the second pituitary support 171, the first pituitary assembly 16 and the second pituitary assembly 17 are also provided with a spring mechanism 18 which is used for controlling the movement radius of the first pituitary assembly 16 and the second pituitary assembly 17, when the rope wheel assembly rotates normally, the movement radius of the first pituitary assembly 16 and the second pituitary assembly 17 is small under the action of the spring mechanism 18, so that the pituitary assembly can not beat the stop assembly 15 in the rotating process, thereby triggering the subsequent braking assembly, when the elevator exceeds the limiting speed of the speed limiter, the speed of the elevator car is increased, the rotation speed of the rope wheel assembly increases, so that the centrifugal force of the first pituitary assembly 16 and the second pituitary assembly 17 is increased, and the second pituitary assembly 17 can be triggered by the second pituitary assembly 17, and the second pituitary assembly 17 can be triggered by the accurate, and the second pituitary assembly can be triggered by the second pituitary assembly 17, and the second pituitary assembly can be triggered by the second pituitary assembly, and the second pituitary assembly can be triggered by the speed, and the second pituitary assembly, and the brake assembly can be triggered by the speed.

On the basis of the above, as shown in fig. 4, the device further comprises a connecting rod 19, the middle part of the connecting rod 19 is installed in the middle of the rope pulley assembly through a bearing and rotates synchronously along with the rope pulley assembly, two ends of the connecting rod 19 are respectively provided with kidney-shaped limiting holes 20, the two kidney-shaped limiting holes 20 are respectively sleeved on a first connecting shaft 164 and a second connecting shaft 174, and the arrangement of the connecting rod 19 can limit the movement radius of the first pituitary assembly 16 and the second pituitary assembly 17, so that after the movement radius of the first pituitary assembly 16 and the second pituitary assembly 17 is increased, the movement radius of the first pituitary assembly 16 and the second pituitary assembly 17 can only be within the limit range of the kidney-shaped limiting holes 20, and therefore the first beating rod 163 or the second beating rod 173 can accurately beat the speed limiter switch 2 and the stop assembly 15 under overspeed conditions.

On the basis of the above, as shown in fig. 7, the spring mechanism 18 further comprises a screw rod 181, a spring stop 175 is arranged on one side of the second pituitary body support 171 near the second pituitary body support 172, a spring through hole is arranged in the spring stop 175, one end of the screw rod 181 is arranged at the hinge position of the first pituitary body support 161 and the rope pulley component through a fixed copper block 182, the other end of the screw rod 181 penetrates through the spring through hole, two spring fixing washers 183 are arranged on one end of the screw rod 181 penetrating through the spring stop 175, the springs 184 are sleeved on the screw rod 181 and are positioned between the two spring fixing washers 183, in the normal rotation process, the opposite ends of the first pituitary body support 161 and the second pituitary body support 171 are acted by the springs 184, so that the first pituitary body support 161 and the second pituitary body support 171 rotate within a small movement radius range, and the centrifugal force increased by the first pituitary body component 16 and the second pituitary body component 17 overcomes the spring 184 force, so that the movement radius of the first pituitary body component 16 and the second pituitary body component 17 is increased, and the second pituitary body component 172 is increased, and the brake component 173 is not braked, and the brake component is driven by the brake component is not started, and the brake component is stopped, 15 is stopped, and the brake component is not braked.

On the basis of the above, as shown in fig. 8, the stop assembly 15 includes a stop body 151, the middle part of the stop body 151 is hinged to the side wall of the bracket 1, one end of the stop assembly 15 is provided with a bead screw 152 contacting with the pawl 6 for blocking the pawl 6, the other end of the stop assembly 15 is provided with a set screw 153 for receiving the external rotation force of the pituitary assembly, in the original state, the end of the bead screw 152 of the stop assembly 15 is in contact with the pawl 6, so that the pawl 6 cannot be blocked in the ratchet mechanism 4, when the end of the set screw 153 is subjected to the external force given by the pituitary assembly, the stop body 151 rotates around the hinge point, so that the interference force of the bead screw 152 to the pawl 6 disappears, and the brake assembly is triggered to perform the braking operation.

While the foregoing is directed to embodiments of the present invention, other and further details of the invention may be had by the present invention, it should be understood that the foregoing description is merely illustrative of the present invention and that no limitations are intended to the scope of the invention, except insofar as modifications, equivalents, improvements or modifications are within the spirit and principles of the invention.

Claims

1. The utility model provides an elevator overspeed governor, includes support (1), and overspeed governor switch (2) are installed on support (1) upper portion, support (1) are including bottom plate and lateral wall, be provided with rope sheave subassembly in support (1), rope sheave subassembly is including being used for around wire rope's rope sheave mechanism (3) and ratchet (4), its characterized in that: the rope wheel assembly comprises a rope wheel assembly, a brake assembly and a brake shoe (8), wherein the rope wheel assembly is arranged on one side of the rope wheel assembly, the brake assembly comprises a compression spring (5) which is vertically arranged, the lower end of the compression spring (5) is fixed on a bottom plate, a pawl (6) which can be clamped into a ratchet mechanism (4) is arranged at the upper end of the compression spring (5), a third through hole (7) is arranged at the lower part of the pawl (6), the brake shoe (8) is further provided with a brake shoe (8), a first waist-shaped hole (9) is arranged at the upper part of the brake shoe (8), a third waist-shaped hole (10) is arranged at the lower part of the brake shoe (8), a second through hole (11) which is arranged at the upper part and a second waist-shaped hole (12) which is arranged at the lower part of the brake shoe are arranged, a brake shoe shaft (13) which passes through the second through hole (11) and a brake shaft (14) which passes through the second waist-shaped hole (12), the brake shoe (6) is arranged on the brake shaft (14) through the third through the waist-shaped hole (7), the brake shoe (8) is arranged on the brake shoe (14) through the third waist-shaped hole (10), the brake shoe (9) is arranged on the side wall, and the brake assembly is further provided with a brake shoe brake assembly which is arranged on the side wall which is used for triggering brake assembly (15;

the pituitary assembly comprises a first pituitary assembly (16) and a second pituitary assembly (17), the first pituitary assembly (16) comprises a first pituitary support (161), one end of the first pituitary support (161) is hinged with the rope pulley assembly, the other end of the first pituitary support (161) is provided with a first pituitary (162), one side of the first pituitary (162) is provided with a first beating rod (163) which can be contacted with the stop assembly (15), and the other side of the first pituitary (162) is provided with a first connecting shaft (164) which penetrates through the first pituitary support (161);

the second pituitary assembly (17) comprises a second pituitary support (171), one end of the second pituitary support (171) is hinged with the rope wheel assembly, a second pituitary (172) is arranged at the other end of the second pituitary support (171), a second beating rod (173) which can be contacted with the stop assembly (15) is arranged on one side of the second pituitary (172), a second linkage shaft (174) which penetrates through the second pituitary support (171) is arranged on the other side of the second pituitary (172), and a spring mechanism (18) which is used for controlling the movement radius of the first pituitary assembly (16) and the second pituitary assembly (17) is further arranged on the first pituitary assembly (16) and the second pituitary assembly (17);

the stop assembly (15) comprises a stop body (151), the middle of the stop body (151) is hinged to the side wall of the support (1), one end of the stop assembly (15) is provided with a wave bead screw (152) which is in contact with the pawl (6) and used for blocking the pawl (6), and the other end of the stop assembly (15) is provided with a set screw (153) which is used for receiving external rotation force of the pituitary assembly.

2. An elevator governor as defined in claim 1, wherein: the rope pulley assembly is characterized by further comprising a connecting rod (19), the middle part of the connecting rod (19) is installed in the middle of the rope pulley assembly through a bearing and synchronously rotates along with the rope pulley assembly, waist-shaped limiting holes (20) are formed in two ends of the connecting rod (19), and the two waist-shaped limiting holes (20) are respectively sleeved on a first connecting shaft (164) and a second connecting shaft (174).

3. An elevator governor as defined in claim 2, wherein: the spring mechanism (18) comprises a screw rod (181), a spring stop block (175) is arranged on one side, close to the second pituitary body (172), of the second pituitary body support (171), a spring passing hole is formed in the spring stop block (175), one end of the screw rod (181) is installed at the hinge joint of the first pituitary body support (161) and the rope pulley assembly through a fixed copper block (182), the other end of the screw rod (181) passes through the spring passing hole, two spring fixing washers (183) are arranged at one end, penetrating through the spring stop block (175), of the screw rod (181), and the spring (184) is sleeved on the screw rod (181) and is located between the two spring fixing washers (183).