Elevator overspeed governor

Abstract

The application discloses an elevator speed limiter, which comprises a mounting base, a mounting front frame and a mounting rear frame arranged on the mounting base, a tension spring and a spring box mounted on the mounting rear frame, an electromagnetic valve connected to the mounting rear frame, a speed limiter wheel arranged between the mounting front frame and the mounting rear frame, a shock absorber and a brake arranged between the mounting front frame and the mounting rear frame, wherein the shock absorber is fixedly connected to the brake through a pin, the lower joint of the shock absorber abuts against the speed limiter wheel, and a cleaning assembly is further arranged on the mounting base and used for cleaning the inside of a rope groove of the speed limiter wheel, wherein the cleaning assembly comprises a cleaning frame, a driven wheel and a brush plate assembly, a scraper extending into the rope groove is arranged on one side of the cleaning frame upwards, the driven wheel is matched with the speed limiter wheel, and the brush plate assembly is provided with brush hairs extending into the rope groove. The application can effectively absorb the vibration impact of the speed limiter wheel, improve the shock absorption effect of the speed limiter, clean the rope groove of the speed limiter, and avoid triggering the safety protection switch of the speed limiter or causing the rope to fall off the track due to excessive accumulation of oil dirt.

Description

Technical Field

[0001] This invention relates to the field of elevator safety technology, and in particular to an elevator speed governor. Background Technology

[0002] The elevator speed governor is one of the safety control components in the elevator safety protection system. When the elevator is in operation, if the car speeds up for any reason, or even if there is a risk of falling, and all other safety protection devices fail to function, the speed governor and safety brake will work together to stop the elevator car.

[0003] After prolonged operation, the speed governor wheel of a traditional elevator speed governor often becomes affected by dirt and wear, impacting the normal operation of the elevator. Current cleaning methods usually require shutdown maintenance and professional cleaning and maintenance, which is not only time-consuming and labor-intensive but also has limited effectiveness. In addition, the rubber rings on the shock absorbers of existing elevator speed governors are prone to wear and breakage, which can get stuck on the speed governor wheel and cause braking, resulting in elevator safety accidents. Summary of the Invention

[0004] To address the aforementioned problems, this invention proposes an innovative elevator speed governor design that combines automatic cleaning of the speed governor wheel with improved shock absorption. By installing a cleaning device at the bottom of the speed governor wheel, dirt and debris are promptly removed. Simultaneously, this invention introduces a novel shock-absorbing structure, enhancing the speed governor's shock absorption effect and resulting in smoother and safer elevator operation.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] This invention provides an elevator speed governor, including a mounting base with a front mounting frame and a rear mounting frame. A tension spring and a spring box are mounted on the rear mounting frame, which is also connected to a solenoid valve. A speed governor wheel is located between the front and rear mounting frames. A shock absorber and a brake are also located between the front and rear mounting frames. The shock absorber is fixed to the brake by a pin, and its lower connector abuts against the speed governor wheel. The mounting base also includes a cleaning assembly for cleaning the rope groove of the speed governor wheel. The cleaning assembly includes a cleaning frame, a driven wheel, and a brush assembly. One side of the cleaning frame extends upwards with a scraper that extends into the rope groove. The driven wheel cooperates with the speed governor wheel, and the brush assembly has bristles that extend into the rope groove.

[0007] Furthermore, one end of the tension spring is fixed to the rear mounting bracket, and the other end is connected to the brake plate. The spring box is fixed to the rear mounting bracket by screws.

[0008] Furthermore, the solenoid valve is connected to the mounting frame via a connecting plate and is used to drive the brake plate to move.

[0009] Furthermore, two bearings are installed inside the speed limiter wheel, and the speed limiter wheel is installed between the front mounting frame and the rear mounting frame via a guide shaft.

[0010] Furthermore, the shock absorber includes an upper connector, a main bolt, a round nut, a compression spring, a lock nut, and a lower connector. One end of the main bolt is inserted into the recessed hole of the upper connector and can move a certain distance within the recessed hole of the upper connector. The other end of the main bolt is screwed into the screw hole of the lower connector and is fixedly connected to the lower connector.

[0011] Furthermore, the main bolt is also provided with a locking nut, which abuts against the lower connector to lock the main bolt to the lower connector, and the external thread of the upper connector is provided with a round nut.

[0012] Furthermore, a compression spring is fitted onto the main bolt, with one end of the spring abutting against the lower connector and the other end abutting against the round nut.

[0013] Furthermore, the brake includes a trigger plate, a brake plate, a bearing sleeve, a bearing, a washer, a connecting shaft, and a pin. The trigger plate and the brake are connected together by screws. The washer is locked onto the bearing sleeve for positioning. The brake is fixed to the shock absorber by the pin. The connecting shaft installs the brake between the front mounting frame and the rear mounting frame.

[0014] Furthermore, the driven wheel is installed in the middle of the cleaning frame, and the driven wheel is provided with a speed limiter wheel mating groove for pressing against the speed limiter wheel. The driven wheel is provided with an annular groove and a recess in the middle.

[0015] Furthermore, the brush assembly includes a swing shaft rotatably mounted inside the cleaning frame. A support rod is mounted upward at the middle of the swing shaft, and brush bristles are mounted on the support rod, extending upward into the interior of the speed limiter wheel. Torsion springs for driving the swing shaft to rotate are also provided at both ends of the swing shaft. A lever is provided downward at the middle of the swing shaft, and the lever extends into the groove of the driven wheel, sliding in or out of different grooves as the driven wheel rotates. Beneficial effects

[0016] The technical solution provided by this invention has the following advantages compared with the known prior art:

[0017] This invention improves the shock absorption effect of the speed governor by adding a new shock-absorbing structure to the speed governor, thus avoiding the problem of the rubber ring of the existing speed governor being easily worn and broken, getting stuck on the speed governor wheel and causing braking, which could lead to elevator safety accidents. This makes the elevator run more smoothly and safely. At the same time, a cleaning component is also provided at the bottom of the speed governor to clean the dirt or debris on the speed governor wheel in a timely manner, keeping the speed governor clean at all times and preventing excessive oil accumulation from triggering the safety protection switch of the speed governor or causing rope derailment and detachment accidents. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the elevator speed governor of the present invention;

[0019] Figure 2 This is a side view of the elevator speed limiter of the present invention;

[0020] Figure 3 This is a rear view of the elevator speed limiter of the present invention;

[0021] Figure 4 This is a schematic diagram of the rear frame installation in this invention;

[0022] Figure 5 This is a structural diagram of the speed limiter wheel in this invention;

[0023] Figure 6 This is a structural diagram of the shock absorber in this invention;

[0024] Figure 7 This is a structural diagram of the brake in this invention;

[0025] Figure 8 This is a schematic diagram of the cleaning component in this invention;

[0026] Figure 9 This is a schematic diagram of the driven wheel in this invention;

[0027] Figure 10 This is a structural diagram of the brush assembly in this invention.

[0028] The attached diagram is described as follows: 1-Front mounting bracket, 3-Solenoid valve, 5-Mounting base, 8-Spring box, 9-Connecting plate, 10-Rear mounting bracket, 11-Tension spring;

[0029] 2-Speed ​​limiter wheel, 21-Bearing, 22-Guide shaft;

[0030] 7-Shock absorber, 71-Upper connector, 72-Main bolt, 73-Round nut, 74-Compression spring, 75-Locking nut, 76-Lower connector;

[0031] 4-Brake, 41-Connecting shaft, 42-Bearing, 43-Trigger plate, 44-Brake plate, 45-Washer, 46-Bearing sleeve, 47-Pin;

[0032] 6-Cleaning assembly, 61-Cleaning frame, 62-Scraper, 63-Driven wheel, 6301-Speed ​​limiter wheel mating groove, 6302-Annular groove, 6303-Groove, 64-Brush plate assembly, 641-Brush bristles, 644-Swing shaft, 643-Torsion spring, 642-Support rod, 645-Pulley. Detailed Implementation

[0033] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0034] A specific embodiment 1 of the elevator speed limiter of the present invention is as follows: Figures 1 to 10 As shown, the system includes a mounting base 5, on which a front mounting frame 1 and a rear mounting frame 10 are mounted. A tension spring 11 and a spring box 8 are mounted on the rear mounting frame 10. A solenoid valve 3 is also connected to the rear mounting frame 10. A speed limiter wheel 2 is located between the front mounting frame 1 and the rear mounting frame 10. A shock absorber 7 and a brake 4 are also located between the front mounting frame 1 and the rear mounting frame 10. The shock absorber 7 is fixed to the brake 4 by a pin. The lower connector 76 of the shock absorber 7 abuts against the speed limiter wheel 2. The mounting base 5 is also equipped with a cleaning component 6 for cleaning the inside of the rope groove of the speed limiter wheel 2. The cleaning component 6 includes a cleaning frame 61, a driven wheel 63, and a brush assembly 64. A scraper 62 extending into the rope groove is provided on one side of the cleaning frame 61. The driven wheel 63 cooperates with the speed limiter wheel 2. The brush assembly 64 is provided with bristles 641 extending into the rope groove. The wheel groove passes through the scraper 62 and the brush assembly 64 in sequence, which can further clean the oil stains that the scraper 62 could not scrape off.

[0035] In this invention, one end of the tension spring 11 is fixed to the mounting frame 10, and the other end is connected to the brake plate 44, which effectively reduces the vibration of the brake 4. The spring box 8 is fixed to the mounting frame 10 by screws. The solenoid valve 3 is connected to the mounting frame 10 through the connecting plate 9. When the elevator overspeeds, the solenoid valve 3 is activated, which drives the brake 4 to move downward and lock onto the speed limiter wheel 2, causing the speed limiter wheel 2 to stop moving and triggering the safety protection. Two bearings 21 are installed inside the speed limiter wheel 2. The speed limiter wheel 2 is mounted on the mounting frame through the guide shaft 22.

[0036] In this invention, the shock absorber 7 includes an upper connector 71, a main bolt 72, a round nut 73, a compression spring 74, a locking nut 75, and a lower connector 76. One end of the main bolt 72 is inserted into the recess of the upper connector 71 and can move a certain distance within the recess. The other end of the main bolt 72 is screwed into the threaded hole of the lower connector 76 and fixedly connected to the lower connector 76. The main bolt 72 is also provided with a locking nut 75, which abuts against the lower connector 76 to lock the main bolt 72 and the lower connector 76 together. The upper connector 71 has an external threaded section... A round nut 73 is provided, and a compression spring 74 is fitted on the main bolt 72. One end of the compression spring 74 abuts against the lower connector 76, and the other end abuts against the round nut 73. The locking nut 75 can adjust the relative position of the main bolt 72 and the lower connector 76, and the round nut 75 can adjust its relative position with the upper connector 71, thereby fine-tuning the length of the compression spring 74, that is, adjusting the shock absorption effect of the shock absorber 7. When the lower connector 76 is squeezed by the speed limiter wheel 2, the main bolt 72 penetrates into the concave hole of the upper connector 71, and the compression spring 74 is compressed to play a shock absorption role.

[0037] In this invention, the brake 4 includes a trigger plate 43, a brake plate 44, a bearing sleeve 46, a bearing 42, a washer 45, a connecting shaft 41, and a pin 47. The trigger plate 43 and the brake 44 are connected together by screws. The washer is stuck on the bearing sleeve 46 for limiting. The brake 4 is fixed to the shock absorber 7 by the pin 47. The connecting shaft 41 installs the brake 4 between the front mounting frame 1 and the rear mounting frame 10.

[0038] In this invention, the driven wheel 63 is installed in the middle of the cleaning frame 61. The driven wheel 63 is provided with a speed limiter wheel mating groove 6301 for pressing against the speed limiter wheel 2. The speed limiter wheel 2 drives the driven wheel 63 to move, thereby achieving further cleaning of the speed limiter wheel groove. The driven wheel 63 is provided with an annular groove 6302 and a recessed groove 6303 in the middle. The brush plate assembly 64 includes a swing shaft 644 rotatably installed inside the cleaning frame 61. A support rod 642 is installed upward in the middle of the swing shaft 644 to support... A brush 641 is mounted on the rod 642, extending upwards into the interior of the speed limiter wheel 2. Torsion springs 643 for driving the rotation of the swing shaft 644 are also provided at both ends. A lever 645 is provided downwards in the middle of the swing shaft 644. The lever 645 extends into the groove 6303 of the driven wheel 63. As the driven wheel 63 rotates, it slides in or out of different grooves 6303, causing the support rod 644 to swing to different degrees. This allows the brush 641 to more thoroughly clean the oil stains inside the speed limiter wheel groove.

[0039] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present invention, and these improvements and substitutions should also be considered within the scope of protection of the present invention.

Claims

1. An elevator speed governor, characterized in that, The system includes a mounting base (5), on which a front mounting frame (1) and a rear mounting frame (10) are mounted. A tension spring (11) and a spring box (8) are mounted on the rear mounting frame (10). A solenoid valve (3) is also connected to the rear mounting frame (10). A speed limiter wheel (2) is provided between the front mounting frame (1) and the rear mounting frame (10). A shock absorber (7) and a brake (4) are also provided between the front mounting frame (1) and the rear mounting frame (10). The shock absorber (7) is fixed to the brake (4) by a pin. The lower connector (76) of the vibrator (7) rests against the speed limiter wheel (2). The mounting base (5) is also provided with a cleaning assembly (6) for cleaning the inside of the rope groove of the speed limiter wheel (2). The cleaning assembly (6) includes a cleaning frame (61), a driven wheel (63), and a brush assembly (64). A scraper (62) extending into the rope groove is provided on one side of the cleaning frame (61). The driven wheel (63) cooperates with the speed limiter wheel (2). The brush assembly (64) is provided with bristles (641) extending into the rope groove. The shock absorber includes an upper connector (71), a main bolt (72), a round nut (73), a compression spring (74), a locking nut (75), and a lower connector (76). One end of the main bolt (72) is inserted into the recess of the upper connector (71) and can move a certain distance in the recess of the upper connector (71). The other end of the main bolt (72) is screwed into the screw hole of the lower connector (76) and fixedly connected to the lower connector (76). The main bolt (72) is also provided with a locking nut (75), which abuts against the lower connector (76) to lock the main bolt (72) and the lower connector (76). The external thread of the upper connector (71) is provided with a round nut (73). A compression spring (74) is fitted on the main bolt (72), with one end of the compression spring (74) abutting against the lower connector (76) and the other end abutting against the round nut (73); The driven wheel (63) is installed in the middle of the cleaning frame (61). The driven wheel (63) is provided with a speed limiter wheel mating groove (6301) for pressing against the speed limiter wheel (2). The driven wheel (63) is provided with an annular groove (6302) and a groove (6303) in the middle. The brush assembly (64) includes a swing shaft (644) rotatably mounted inside the cleaning frame (61). A support rod (642) is mounted upward in the middle of the swing shaft (644). Brush bristles (641) are mounted on the support rod (642) and extend upward into the interior of the speed limiter wheel (2). Torsion springs (643) for driving the swing shaft (644) to rotate are also provided at both ends of the swing shaft (644). A lever (645) is provided downward in the middle of the swing shaft (644). The lever (645) extends into the groove (6303) of the driven wheel (63) and slides in or out of different grooves (6303) as the driven wheel (63) rotates. The brake (4) includes a trigger plate (43), a brake plate (44), a bearing sleeve (46), a bearing (42), a washer (45), a connecting shaft (41), and a pin (47). The trigger plate (43) and the brake plate (44) are connected together by screws. The washer (45) is locked on the bearing sleeve (46) for limiting. The brake (4) is fixed to the shock absorber (7) by the pin (47). The connecting shaft (41) installs the brake (4) between the front mounting frame (1) and the rear mounting frame (10).

2. The elevator speed governor according to claim 1, characterized in that, One end of the tension spring (11) is fixed on the mounting frame (10), and the other end is connected to the brake plate (44). The spring box (8) is fixed on the mounting frame (10) by screws.

3. An elevator speed governor according to claim 2, characterized in that, The solenoid valve (3) is connected to the mounting frame (10) via the connecting plate (9) and is used to drive the brake (4) to operate.

4. An elevator speed governor according to claim 3, characterized in that, Two bearings (21) are installed inside the speed limiter wheel (2), and the speed limiter wheel (2) is installed between the front mounting frame (1) and the rear mounting frame (10) via the guide shaft (22).

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