CN108584606B - A flexible two-way elevator speed limiter - Google Patents

Abstract

The invention discloses a flexible two-way elevator speed governor, which includes a speed governor sheave, and also includes a trigger device and a brake device; the trigger device includes a throwing block mechanism, an eccentric lock ring, a notch runner and a lock plate, A first spring and a lock tongue are arranged in the radial blind lock hole of the lock disc; the brake device includes a friction block carrier plate, a friction block, a friction block support rod and a bolt guide rod, and the friction block is bonded to the On the friction block carrier plate, one end of the friction block support rod is pushed against the notch of the notch runner, and the other end is socketed with the bolt guide rod, and the bolt guide rod is fixed on the bracket, wherein, A second spring is also provided between the friction block carrier plate and the bracket. The invention realizes flexible braking and improves the safety and comfort of elevator users; at the same time, only one set of triggering device and braking device is needed to realize the speed limiting function of the elevator's upward and downward overspeed running, and the structure is simple and the cost is reduced.

Description

A flexible two-way elevator speed limiter

technical field

The invention relates to the technical field of elevators, in particular to a flexible two-way elevator speed governor.

Background technique

At present, the speed limiter of the elevator mainly has two structural forms: the pendulum type and the centrifugal type. The former mainly uses the cam speed to affect the rhythm and amplitude of the swing of the pendulum. When the speed limiter sheave speed reaches the threshold set by the speed limiter, The pendulum triggers the overspeed brake switch, making the sheave stop running, further triggering the braking action of the safety gear, and finally achieving the effect of elevator braking. The latter mainly uses the throwing block to move away from the center of rotation under the action of centrifugal force, thereby triggering the brake switch, and finally making the elevator stop running.

Regardless of whether it is a pendulum or a throwing block, triggering the brake switch is achieved through the action of the pawl snapping into the tooth groove of the ratchet wheel, which will produce a large impact, causing great discomfort to passengers, and even fear, and will Affect the service life of the speed limiter. In addition, most speed limiters only have one-way speed limit function, which is only effective for elevator downlink overspeed speed limit. The speed limiter that realizes two-way speed limit function needs to be equipped with two sets of trigger brake devices.

Contents of the invention

The present invention mainly solves the technical problems existing in the prior art, thereby providing a flexible brake, which only needs a set of trigger device and brake device to realize the speed limit function of the elevator's upward and downward overspeed operation, simple in structure and A low-cost flexible two-way speed governor for elevators.

Above-mentioned technical problem of the present invention is mainly solved by following technical scheme:

The flexible two-way elevator speed governor provided by the present invention includes a speed governor sheave, and it also includes a trigger device and a braking device;

The triggering device includes a throwing block mechanism, an eccentric locking ring, a notched wheel and a locking disc;

The throwing block mechanism is connected to the front of the speed governor sheave through screw pins;

The eccentric lock ring is connected to the back of the speed governor sheave through an internally threaded shaft, the internally threaded shaft and the screw pin are connected to form the same pin shaft, and a positioning arm is provided on the upper end of the eccentric lock ring, so that The positioning arm is in contact with the block throwing mechanism;

The notch runner and the lock disc are connected at the center position of the back of the speed governor sheave through the bolt shaft, and the lock disc is fixed on the bolt shaft through a key; the notch runner and the bolt shaft It is a clearance fit; the lock disc has a blind lock hole in the radial direction, a first spring is provided at the bottom of the blind lock hole, and a lock tongue is placed on the top of the first spring, wherein the inner wall of the eccentric lock ring is The blind lock hole is in contact with the deadbolt (in the locked state) or the notch runner (in the unlocked state);

The braking device includes a friction block carrier plate, a friction block, a friction block support rod and a bolt guide rod, the friction block is bonded to the friction block carrier plate, and the friction block carrier plate is screwed to the Friction block support rod, one end of the friction block support rod is pushed against the notch of the notch runner, and the other end is socketed with the bolt guide rod, and the bolt guide rod is fixed on the bracket, wherein the A second spring is also provided between the friction block carrier plate and the bracket.

Further, the throwing block mechanism includes a centrifugal throwing block, a spring connecting rod and a throwing block linkage connecting rod. There are two centrifugal throwing blocks, which are respectively connected with the spring connecting rod and the throwing block The linkage connecting rod is connected, and the spring connecting rod passes through the extension arm of the third spring and the speed governor sheave in turn; when the speed governor sheave rotates at high speed, the centrifugal throwing block is away from the rotation under the action of centrifugal force center.

Further, it also includes a retaining ring, a split retaining ring, a sealing ring, an oil slinger, a sleeve and two rolling bearings, the speed governor sheave is mounted on the bolt shaft through the rolling bearings, and the two rolling bearings The sleeves are separated between them, the retaining ring is provided between the rolling bearing on the rear side and the lock plate, and the outer end of the rolling bearing on the front side is provided with a sealing ring and an oil deflector ring in turn.

Further, it also includes a support and a base, the support is fixed on the base by fixing bolts, and the middle part of the support is reinforced and pre-tightened by bolts and nuts.

Further, the blind lock hole has a circular arc structure with a small outside and a large inside along the radial direction of the speed governor sheave.

Further, the contact end of the locking bolt and the first spring is a plane, and the other end is a hemispherical surface.

Further, the support is made of U-shaped steel plate.

The beneficial effect of the present invention is that: the radial position of the lock tongue in the lock disc is controlled by the first spring expansion and contraction, and then the opening and closing of the blind lock hole is controlled to realize the action of triggering the brake actuator, and use the principle of friction brake to perform Braking, its triggering action and braking action will not produce a large impact, which realizes flexible braking and improves the safety and comfort of elevator users; at the same time, as long as the speed limiter sheave speed reaches the set Threshold, the centrifugal throwing block is far away from the center of rotation, all will make the only trigger device act, and then cause the only brake device to work. Therefore, only one set of trigger device and brake device is needed to realize the speed limit function of the elevator's upward and downward overspeed running , simple structure and low cost.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is the front view of flexible two-way elevator governor of the present invention;

Fig. 2 is the left side view of flexible two-way elevator governor of the present invention;

Fig. 3 is a rear view of the flexible two-way elevator speed governor of the present invention.

Detailed ways

The preferred embodiments of the present invention will be 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, so as to define the protection scope of the present invention more clearly.

Referring to Figures 1-3, the flexible two-way elevator speed governor of the present invention includes a speed governor sheave 6, which also includes a trigger device and a braking device;

The triggering device includes a throwing block mechanism, an eccentric locking ring 7, a notch runner 33 and a locking disc 29;

The throwing block mechanism is connected to the front of the speed governor sheave 6 through screw pins 9; the number of screw pins 9 is two, which are respectively arranged on the upper and lower sides of the block throwing mechanism;

The eccentric lock ring 7 is connected to the back side of the speed governor sheave 6 through the internally threaded shaft 19, the internally threaded shaft 19 is connected with the screw pin 9 as the same pin shaft, and the upper end of the eccentric lock ring 7 is provided with a positioning arm (not shown in the figure). ), the positioning arm is in contact with the throwing block mechanism;

The notch runner 33 and the lock disc 29 are connected at the center position of the back of the speed governor sheave 6 via the bolt shaft 24, and the lock disc 29 is fixed on the bolt shaft 24 via the key 16; the notch runner 33 and the bolt shaft 24 are clearance fit The lock plate 29 has a blind lock hole in the radial direction, the bottom of the blind lock hole is provided with a first spring 18, and the first spring 18 tops the dead bolt 17, wherein the inner wall of the eccentric lock ring 7 is in contact with the dead bolt at the blind lock hole. 17 (during the locked state) or the notch runner 33 (during the unlocked state) are in contact; in the present invention, the blind lock hole is an arc structure that is small on the outside and large on the inside along the radial direction of the speed governor sheave 6, and the dead bolt 17 and The contact end of the first spring 18 is a plane, and the other end is a hemispherical surface, so that after the dead bolt 17 is pressed into the blind lock hole, only a small circumferential force can be used to promote the notch runner 33 to rotate.

The brake device includes a friction block carrier plate 30, a friction block 31, a friction block support rod 32 and a bolt guide rod 2, the friction block 31 is bonded on the friction block carrier plate 30, and the friction block carrier plate 30 is connected to the friction block support plate by threads. Rod 32, one end of the friction block support rod 32 is on the notch of the notch runner 33, and the other end is socketed with the bolt guide rod 2, and the bolt guide rod 2 is fixed on the bracket 3, wherein the friction block carrier plate 30 and the bracket A second spring 4 is also provided between the 3. In the present invention, the friction block rod 32 is formed by two sections socketed together. As the pressure of the second spring 4 changes, the two sections can slide relative to each other, so that the distance between the friction block 31 and the speed governor sheave 6 can be changed. The distance, and then realize the braking function.

In the present invention, under the pressure of the second spring 4 , the friction block rod 32 exerts a thrust on the notch runner 33 ; in the non-overspeed state, the lock tongue 17 limits the circular movement of the notch runner 33 . And under overspeed state, dead bolt 17 is all pressed in the notch runner 33 li by the inner wall of eccentric lock ring 7, under the thrust effect of second spring 4 to friction piece strut 32, blind lock hole is fully opened, and notch turns The wheel 33 loses the resistance in the circumferential direction and rotates. At the same time, the pressure of the second spring 4 pushes the friction block 31 and the friction block strut 32 to move downward, and the friction block 31 hugs the steel wire rope wound on the speed governor sheave 6 tightly. It decelerates with the speed governor sheave 6 under the action of friction, thereby triggering the safety braking work.

Specifically, the throwing block mechanism includes a centrifugal throwing block 12, a spring connecting rod 10, and a throwing block linkage connecting rod 5. There are two centrifugal throwing blocks 12, and they are respectively linked with the spring connecting rod 10 and the throwing block through bolt pins 8. The rod 5 is connected, and the spring connecting rod 10 passes through the extension arm of the third spring 11 and the speed governor sheave 6 successively; when the speed governor sheave 6 rotates at a high speed, the centrifugal throwing block 12 is away from the center of rotation under the action of centrifugal force. In the present invention, the spring connecting rod 10 is composed of two sections of monomers, and the two sections of monomers are connected by internal and external threads and pass through the hub extension arm of the speed governor sheave 6 . The third spring 11 produces proper tension by the cooperation of the boss on the spring connecting rod 10 and the hub extension arm of the speed limiter sheave 6. The length of both sides of the hub extension arm hole of the device sheave 6, thereby changing the shape of the throwing block mechanism, and then touching and changing the position of the eccentric lock ring 7.

In the present invention, when the speed governor sheave 6 is stationary, the third spring 11 and the positioning arm of the eccentric lock ring 7 work together to make the centrifugal throwing block 12 be at the closest position to the speed governor sheave 6 rotation center. When the speed governor sheave rotates at a high speed, the centrifugal force of the centrifugal throwing block 12 overcomes the resistance of the third spring 11 and the positioning arm of the eccentric lock ring 7, away from the center of rotation of the speed governor sheave 6, and pushes the eccentric lock ring 7 around the screw pin 9 rotates so that the ring center of the eccentric lock ring 7 deviates from the center of the lock disc, thereby overcoming the resistance of the first spring 18 and pushing the lock tongue 17 to the center of the lock disc 29 . When the rotating speed of speed limiter sheave 6 reached the set threshold value, the eccentricity of eccentric lock ring 7 reached the maximum, and the inner wall of eccentric lock ring 7 contacted with the notch runner 33, at this moment, the notch runner 33 was subjected to less The lock can be fully opened with force.

In order to play the effect of auxiliary connection, positioning and sealing, the present invention also includes retaining ring 15, split retaining ring 20, sealing ring 22, oil deflector ring 23, sleeve 25 and two rolling bearings 21, and speed governor sheave 6 passes through The rolling bearing 21 is installed on the bolt shaft 24, and the two rolling bearings 21 are separated by a sleeve 25. A retaining ring 15 is arranged between the rear rolling bearing 21 and the lock plate 29, and a sealing ring is arranged on the outer end of the front rolling bearing 21 in turn. 22 and oil deflector ring 23.

The present invention also includes a support 13 and a base 28 , the support 13 is fixed on the base 28 by a fixing bolt 27 , and the middle part of the support 13 is reinforced and pre-tightened by the bolt 26 and the nut 14 . Wherein, the support 13 is made of U-shaped steel plate, and in other embodiments of the present invention, the support 13 can also be made of other materials.

Working process of the present invention is as follows:

When the elevator is in the non-overspeed running state, under the pressure of the first spring 18, the dead bolt 17 is always pressed against the inner wall of the eccentric lock ring 7, and the eccentric lock ring 7 and the notched runner 33 maintain a certain gap at the blind lock hole. The lockhole is in a locked state, limiting the rotation of the notch runner 33;

When the speed of the speed limiter sheave 6 reaches the set threshold, the centrifugal throwing block 12 is away from the center of rotation under the action of centrifugal force, driving the positioning arm on the upper end of the eccentric lock ring 7 to rotate around the screw pin 9, so that the eccentric amount of the eccentric lock ring 7 When the maximum value is reached, the inner wall of the eccentric lock ring 7 is close to the notch runner 33, and the deadbolt 17 is pressed into the notch runner 33. Due to the circular blind lockhole structure of the notch runner 33, which is small on the outside and large on the inside, and the end of the bolt Under the pressure of the second spring 4, the friction block strut 32 pushes the notch runner 33, and the dead bolt 17 completely enters the lock plate 29 from the outside to the inside of the arc edge of the blind lock hole of the notch runner 33. The friction block strut 32 presses the friction block 31 to the wire rope in the speed governor sheave 6 while promoting the notch runner 33, and is braked by friction. The entire triggering and braking process is a continuous and gradual process, which greatly reduces the impact generated during work. In addition, once the speed limiter speed reaches the set threshold, it can be triggered safely regardless of whether the system is running clockwise or counterclockwise, ensuring the two-way speed limit function of the system.

In summary, the advantages of the present invention are:

The radial position of the lock tongue in the lock disc is controlled by the expansion and contraction of the first spring, and then the opening and closing of the blind lock hole is controlled to trigger the action of the brake actuator, and use the principle of friction brake to perform braking. The trigger action and The braking action will not produce a large impact, realizing flexible braking and improving the safety and comfort of elevator users; at the same time, as long as the speed limiter sheave speed reaches the set threshold, the centrifugal throwing block will stay away from the rotation In the center, the only triggering device will be activated, which in turn will cause the only braking device to work. Therefore, only one set of triggering device and braking device is needed to realize the speed limiting function of the elevator's upward and downward overspeed running, with a simple structure and low cost.

The above are only specific implementations of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or replacements that are not conceived through creative work shall be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the protection scope defined in the claims.

Claims (7)

1. a kind of flexibility Bidirectional elevator overspeed governor, including governor sheave, further include trigger device and brake apparatus, feature exists In,

The trigger device includes Shuai Kuai mechanism, eccentric lock ring, notch runner and lock collar；

The Shuai Kuai mechanism is connected to the front of the governor sheave by screw pin；

The bias lock ring is connected to the back side of the governor sheave, the female threaded shaft and the screw by female threaded shaft Pin connection is same pin shaft, and the upper end of the bias lock ring is equipped with a registration arm, and the registration arm connects with the Shuai Kuai mechanism Touching；

The notch runner and lock collar are connected at the back center position of the governor sheave through bolt axle, the lock collar warp Key is fixed in the bolt axle；The notch runner and the bolt axle are clearance fit；The lock collar is radially provided with blind Lockhole, the blind lockhole bottom are equipped with the first spring, and the first spring overhead has lock tongue, wherein the bias lock ring it is interior Wall is in contact at the blind lockhole with the lock tongue or the notch runner；

The brake apparatus includes friction block support plate, friction block, friction block strut and bolt guide rod, and the friction block is bonded in institute It states on friction block support plate, the friction block support plate is threaded in the friction block strut, and the one of the friction block strut End is withstood on the notch of the notch runner, and the other end and the bolt guide rod are socketed, and the bolt guide rod is fixed on bracket On, wherein second spring is additionally provided between the friction block support plate and the bracket.

2. flexibility Bidirectional elevator overspeed governor as described in claim 1, which is characterized in that the Shuai Kuai mechanism includes centrifugal drying Block, spring link and get rid of block linkage connecting rod, there are two the quantity of the centrifugal block for clutch use, and by bolt pin respectively with the spring Connecting rod is connected with the block linkage connecting rod that gets rid of, and the spring link sequentially passes through the extension of third spring and governor sheave Arm；When the governor sheave high-speed rotation, the centrifugal block for clutch use is under the action of the centrifugal force far from the centre of gyration.

3. flexibility Bidirectional elevator overspeed governor as described in claim 1, which is characterized in that further include retaining ring, split washer, sealing Circle, oil scraper ring, sleeve and two rolling bearings, the governor sheave are mounted on the bolt axle by the rolling bearing On, it is isolated between two rolling bearings by the sleeve, institute is equipped between the rear side rolling bearing and the lock collar Retaining ring is stated, the outer end of the front side rolling bearing is disposed with sealing ring and oil scraper ring.

4. flexibility Bidirectional elevator overspeed governor as described in claim 1, which is characterized in that further include support, pedestal, the support It is fixed on pedestal by fixing bolt, the middle part of the support is reinforced through bolts and nuts to be pre-tightened.

5. flexibility Bidirectional elevator overspeed governor as described in claim 1, which is characterized in that the blind lockhole is along the governor rope Wheel radial is outer small interior big arc structure.

6. flexibility Bidirectional elevator overspeed governor as described in claim 1, which is characterized in that the lock tongue connects with first spring Contravention is plane, and the other end is hemisphere face.

7. flexibility Bidirectional elevator overspeed governor as claimed in claim 4, which is characterized in that the support is made of U-shaped steel plate It forms.