CN106494963B - Brake fall arrester - Google Patents

Abstract

The invention relates to a brake anti-falling device. It includes a mounting seat, which is arranged on the hanging basket sliding along the guide structure; a fixed wedge and a movable wedge, the movable wedge is slidably matched with the fixed wedge, and the movable wedge is provided with a A wear-resistant block in contact with the guide structure, the stop pin is installed at the end of the movable wedge; and a first elastic mechanism and a second elastic mechanism, the first elastic mechanism is arranged on the fixed wedge and the fixed wedge Between the mounting seats, the second elastic mechanism is arranged between the movable wedge and the mounting seats. During the fall arrest process of the hanging basket, the brake fall arrester does not need to consume external energy, and the hanging basket can stop falling only through the friction force generated during the fall process, which simplifies the overall structure of the lock brake fall arrester. At the same time, the process of stopping the hanging basket is a gradual process, and there is a certain buffer time, which will not cause damage to the guiding structure.

Description

Brake fall arrester

technical field

The invention relates to the safety field of hoisting machinery in the automated warehousing and logistics industry, in particular to a brake fall preventer.

Background technique

Generally, in the warehousing and logistics industry, the safety devices of traditional stackers or hoists are mostly motors or safety gears that cooperate with speed limiters to prevent falling. The former only applies brakes to the lifting motor, and the simple electrical control cannot meet the safety protection in the case of a broken lifting belt. Large installation space and inconvenient maintenance.

In the elevator industry where many safety protection devices are used, the structure is mostly fixed on one side, and the wedge or wedge wheel on the other side uses a mechanism of springs and connecting rods to lock the brake. Once this type of brake is used repeatedly, the straightness of the guide rail will And the smoothness of the surface will decrease, which is not conducive to the long-term use of the equipment. When the protection device is working, it is necessary to convert the direction of the force through the link mechanism, resulting in waste of pulling force, and at the same time, the machining accuracy of each joint of the link mechanism is required to be very high.

Contents of the invention

Based on this, it is necessary to provide a brake fall arrester that does not require additional locking power and can ensure the accuracy of the guiding structure.

A brake fall arrester, which is arranged opposite to a guide structure and connected with a lifting belt through a stop pin, comprising:

The mounting seat is arranged on the hanging basket sliding along the guide structure;

A fixed wedge and a movable wedge, the movable wedge is slidingly matched with the fixed wedge, the movable wedge is provided with a wear block in contact with the guide structure, the stop pin is installed on the the ends of the movable wedges; and

A first elastic mechanism and a second elastic mechanism, the first elastic mechanism is arranged between the fixed wedge and the mounting seat, and the second elastic mechanism is arranged between the movable wedge and the mounting seat between;

Wherein, when the lifting belt breaks and the stop pin loses its blocking function on the movable wedge, the first elastic mechanism pushes the movable wedge to slide and makes the wear-resistant block and the guide structural contact, at the same time, the second elastic mechanism presses the movable wedge against the guide structure through the fixed wedge, and the friction between the movable wedge and the guide structure gradually increases Until the hanging basket is stopped from falling.

In one of the embodiments, the first elastic mechanism includes a first elastic member and a tightening screw, the first elastic member is arranged between the movable wedge and the tightening screw, and the tightening screw is installed on the In the screw hole set on the mounting base;

Wherein, when the tightening screw is tightened, the first elastic member is compressed between the movable wedge and the tightening screw.

In one embodiment, the first elastic member is a rectangular spring, and the direction of the elastic force generated by the rectangular spring is parallel to the guiding structure.

In one of the embodiments, the second elastic mechanism includes a second elastic member and a contour screw, the second elastic member is arranged between the fixed wedge and the contour screw, and the contour screw mounted on the mount;

Wherein, when the movable wedge continuously slides relative to the fixed wedge, the movable wedge continuously compresses the second elastic member between the fixed wedge and the contour screw through the fixed wedge. between.

In one embodiment, the second elastic member is a disc spring, and the direction of the elastic force generated by the disc spring is perpendicular to the guiding structure.

In one of the embodiments, the number of the second elastic mechanisms is two, and the line between the two second elastic mechanisms is parallel to the guide structure.

In one of the embodiments, both the fixed wedge and the movable wedge have a trapezoidal longitudinal cross-sectional profile; the fixed wedge includes a first abutting surface connected to the second elastic mechanism, and a a first wedge-shaped surface opposite to the first abutting surface and in contact with the movable wedge, and two first side surfaces connected between the first abutting surface and the first wedge-shaped surface;

The movable wedge includes a second abutting surface for installing a wear-resistant block, a second wedge-shaped surface opposite to the second abutting surface and slidingly fitted with the first wedge-shaped surface, and a second wedge-shaped surface connected to the first wedge-shaped surface. The two second side surfaces between the two abutting surfaces and the second wedge-shaped surface, the top surface for installing the stop pin, and the bottom surface abutting against the first elastic mechanism;

Guide grooves parallel to the second wedge-shaped surface are respectively provided on the two second side surfaces, and L-shaped guide plates matched with the sliding grooves are respectively fixedly installed on the two first side surfaces.

In one of the embodiments, the first wedge surface or the second wedge surface is provided with a first row of needle rollers for reducing friction between the fixed wedge and the movable wedge.

In one embodiment, the bottom surface is provided with a second row of needle rollers for reducing the friction between the movable wedge and the first elastic mechanism.

In one of the embodiments, the longitudinal section of the mounting seat is L-shaped, the mounting seat includes a first mounting body and a second mounting body connected vertically, and the first elastic mechanism is installed on the first mounting body. On the body, the second elastic mechanism is installed on the second installation body.

In the brake fall arrester provided by the present invention, when the lifting belt breaks, under the joint action of the friction force between the wear-resistant block and the guide structure and the elastic force of the first elastic member, the movable wedge will continue to move upward relative to the mounting seat. Slide and push the fixed wedge to overcome the elastic force of the second elastic mechanism and move towards the mounting seat, the elastic force generated by the second elastic mechanism will continue to increase, and the pressing force and friction between the wear-resistant block and the guide structure will continue to increase Large, until the friction between the hanging basket and the guiding structure gradually increases to overcome the gravity of the hanging basket and the goods, and finally the hanging basket stops sliding. During the fall arresting process of the hanging basket, the locking brake anti-fall device does not need to consume external energy, and the hanging basket can stop falling only through the friction force generated during the falling process, which simplifies the overall structure of the locking brake anti-falling device. At the same time, the process of stopping the hanging basket is a gradual process, and there is a certain buffer time, which will not cause damage to the guiding structure.

Description of drawings

Fig. 1 is a three-dimensional structural schematic diagram of a cargo hoist;

Fig. 2 is a schematic diagram of an enlarged structure at A in Fig. 1;

Fig. 3 is a schematic plan view of the cargo hoist;

Fig. 4 is a top view structural schematic diagram of the cargo hoist;

Fig. 5 is a schematic diagram of the assembly structure of the hanging basket and the brake fall arrester in a certain state;

Fig. 6 is a schematic diagram of the assembly structure of the hanging basket and the brake fall arrester in another state;

Fig. 7 is a schematic diagram of the three-dimensional structure of the brake anti-drop device at a certain angle of view;

Fig. 8 is a schematic diagram of the three-dimensional structure of the brake fall arrester from another perspective;

Fig. 9 is a structural schematic diagram corresponding to the brake anti-fall device and the linear guide rail;

Fig. 10 is a structural schematic diagram corresponding to the brake anti-fall device and the trapezoidal guide rail;

Fig. 11 is a structural schematic diagram corresponding to the brake anti-fall device and the circular guide rail;

Fig. 12 is a structural schematic diagram corresponding to the brake fall arrester and the V-shaped guide rail.

Detailed ways

In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the associated drawings. Preferred embodiments of the invention are shown in the accompanying drawings. However, the present invention can be embodied in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

It should be noted that when an element is referred to as being “fixed” to another element, it can be directly on the other element or there can also be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present. The terms "inner", "outer", "left", "right" and similar expressions are used herein for the purpose of description only and do not represent the only embodiment.

Referring to FIG. 1 , FIG. 2 and FIG. 4 , a goods hoist is used to lift goods into multi-storey storage, and the hoist includes a column 100 , a hanging basket 200 and a lifting mechanism 300 . The column 100 is a hollow (hollow) cuboid structure, and the column 100 includes a first side wall 110 and a second side wall 120 arranged oppositely, and a third side wall 130 and a fourth side wall 140 arranged oppositely, and the third side wall 130 , the fourth side wall 140 are respectively connected between the first side wall 110 and the second side wall 120, the first side wall 110, the second side wall 120, the third side wall 130 and the fourth side wall 140 together form a The inner cavity 180 of the column 100 . Both the first side wall 110 and the second side wall 120 are provided with guiding structures 170 parallel to each other, and the hanging basket 200 is slidably matched with the guiding structure 170, and the hanging basket 200 carries goods between each storage layer and the ground in the multi-layer three-dimensional storage. The lifting mechanism 300 is installed on the column 100, the lifting mechanism 300 is connected with the hanging basket 200, and can drive the hanging basket 200 to slide up and down along the guiding structure 170.

Since the first side wall 110 and the second side wall 120 are provided with a guide structure 170, and the hanging basket 200 is installed on the guiding structure 170, therefore, two hanging baskets 200 are installed on one column 100 at the same time, and the working efficiency of the hoist is improved. Doubled, at the same time, two hanging baskets 200 are arranged on both sides of the column 100 oppositely, which enhances the balance of the column 100 in the working process, improves the maximum height that the hanging basket 200 can slide on the column 100, and can be used for height Higher multi-storey three-dimensional storage ensures that the column 100 will not shake strongly due to the influence of overturning moment, reducing operation and maintenance costs. In the prior art, only one hanging basket 200 is set on the column 100, and the hanging basket 200 cooperates with the column 100 in an encircling manner. Due to the adoption of this design method, in order to maintain the stability of the column 100, it must be carried out on the top of the column 100. Reinforcement treatment, if the lifting height of the goods exceeds six meters, the hanging basket 200 will shake when it starts or stops at the high position of the column 100. It is very inconvenient to install, debug and maintain, and the production and operation costs are relatively high.

Referring to FIGS. 1 and 3 , the lifting mechanism 300 includes a first lifting assembly and a second lifting assembly oppositely arranged, the first lifting assembly is arranged on the first side wall 110 , and the second lifting assembly is arranged on the second side wall 120 , The first lifting assembly includes a first tensioning pulley 331 , a first driving pulley 321 , a first synchronous belt 311 and a first driver 340 . The first tensioning pulley 331 is fixed on the top of the first side wall 110, the first driving pulley 321 is fixed on the bottom of the first side wall 110, and the first synchronous belt 311 is sheathed and tensioned between the first tensioning pulley 331 and the first tensioning pulley 331. Between the first driving wheels 321, the first side wall 110 is located in the first synchronous belt 311, and the first driver 340 is used to drive the first driving wheel 321 to rotate. Specifically, the first driver 340 includes a first servo motor 241 and a first A speed reducer 342 , the output shaft of the first servo motor 241 is connected with the input shaft of the first speed reducer 342 , and the output shaft of the first speed reducer 342 is connected with the first driving wheel 321 .

Referring to FIG. 1 and FIG. 3 , the second lifting assembly includes a second tensioning pulley 332 , a second driving pulley 322 , a second timing belt 312 and a second driver. The second tensioning pulley 332 is fixed on the top of the second side wall 120, the second driving pulley 322 is fixed on the bottom of the second side wall 120, and the second synchronous belt 312 is sheathed and tensioned between the second tensioning pulley 332 and the second tensioning pulley 332. Between the second driving wheels 322, the second side wall 120 is located in the second synchronous belt 312, and the second driver is used to drive the second driving wheels 322 to rotate. Specifically, the second driver includes a second servo motor and a second reducer , the output shaft of the second servo motor is connected to the input shaft of the second reducer, and the output shaft of the second reducer is connected to the second driving wheel 322 .

Referring to Fig. 1 and Fig. 3, two hanging baskets 200 are respectively connected with the first synchronous belt 311 and the second synchronous belt 312, when the first synchronous belt 311 and the second synchronous belt 312 move up and down, thus driving the two hanging baskets 200 Slide up and down relative to the column 100 along the guide structure 170, therefore, in the process of sliding, the hanging basket 200 can lift the goods from the ground to each storage layer of the multi-layer three-dimensional storage, and can also lift the goods in each storage layer of the multi-layer three-dimensional storage Cargo delivered to the ground.

1 and 2, the guide structure 170 is a double-rail structure, that is, the guide structure 170 includes a first guide rail 171 and a second guide rail 172, the first guide rail 171 and the second guide rail 172 extend along the height direction of the column 100, and the first guide rail 171 and the second guide rail 172 are arranged on the outer surfaces of the first side wall 110 and the second side wall 120, the first guide rail 171 and the second guide rail 172 are parallel to each other, and the hanging basket 200 is installed across the first guide rail 171 and the on the second rail 172.

Referring to FIG. 2 , the hanging basket 200 includes a first slider 210 , a second slider 220 , a mounting frame 230 and a support 240 . The first slider 210 and the second slider 220 are arranged oppositely, the first slider 210 is slidably matched with the first guide rail 171 , the second slider 220 is slidably matched with the second guide rail 172 , and the mounting frame 230 is installed on the first slider 210 And on the second sliding block 220 , the supporting member 240 is disposed on the mounting frame 230 . Specifically, the supporting member 240 includes a first baffle 241 , a second baffle 242 and several rollers 243 . The first baffle plate 241 is fixedly installed on the mounting frame 230 and is perpendicular to the first guide rail 171, the second baffle plate 242 is opposite and parallel to the first baffle plate 241, and one end of the roller shaft 243 is connected with the first baffle plate 241, and the roller The other end of the shaft 243 is connected to the second baffle 242 , and several roller shafts 243 are arranged at intervals with each other. The goods are directly loaded on the roller shaft 243 , and the first baffle plate 241 and the second baffle plate 242 play a role of limiting the goods to prevent the goods from being thrown out of the hanging basket 200 . Through the rolling friction between the roller shaft 243 and the goods, the loading and unloading of the goods on the hanging basket 200 is facilitated, which saves time and labor for loading and unloading.

Referring to Fig. 5 and Fig. 6, four eccentric guide wheels 252 are arranged on the first slider 210, and the four eccentric guide wheels 252 are arranged along the height direction of the first slider 210 (that is, the extension direction of the first guide rail 171). The second slide block 220 is provided with two concentric guide wheels 251 and two eccentric guide wheels 252, and the concentric guide wheels 251 and two eccentric guide wheels 252 are arranged along the height direction of the second slide block 220 (that is, the extending direction of the second guide rail 172). ) arrangement, two eccentric guide wheels 252 are located between two concentric guide wheels 251. It can be understood that the functions of the first slider 210 and the second slider 220 are the same, and the positions of the two can be exchanged.

Since the eccentric guide wheel 252 and the concentric guide wheel 251 are provided, the eccentric guide wheel 252 and the concentric guide wheel 251 slide along the first guide rail 171 and the second guide rail 172, thereby driving the first slider 210 and the second slider 220 to move, in other words , the eccentric guide wheel 252 and the concentric guide wheel 251 convert the sliding friction between the hanging basket 200 and the guiding structure 170 into rolling friction, so that the frictional force between the hanging basket 200 and the guiding structure 170 is greatly reduced, and the stability of the hanging basket 200 is improved. Increase the speed, reduce wear between the hanging basket 200 and the guide structure 170, and ensure the structural strength of the column 100. At the same time, based on the motion trajectory of the concentric guide wheel 251, the eccentric guide wheel 252 on the first slider 210 and the second slider 220 can adjust and correct the movement of the hanging basket 200, thus improving the movement of the hanging basket 200. The accuracy of the trajectory ensures that the movement trajectory of the hanging basket 200 is a straight line, reduces the shaking effect on the column 100 caused by the irregular movement trajectory of the hanging basket 200 , and further reduces the wear between the hanging basket 200 and the column 100 .

Referring to Fig. 1 and Fig. 4, several balance pieces 150 are arranged at intervals on the third side wall 130, and several balance pieces 150 are arranged along the height direction of the third side wall 130, and the external contour of the balance pieces 150 is an isosceles trapezoid, of course, It is understood that it can also be a rectangle or other polygonal structures. Specifically, the balance member 150 includes a fixed rod 151 , a balance rod 152 and two connecting rods 153 . The fixed rod 151 is directly fixed on the third side wall 130, the balance rod 152 is positioned at the outside of the third side wall 130 and keeps a certain distance with the third side wall 130, the balance rod 152 and the fixed rod 151 are parallel to each other, and the two are connected The rod 153 is respectively connected to ends of the fixed rod 151 and the balance rod 152 . Due to the arrangement of the balance piece 150 , through the action of the weight of the balance piece 150 itself, the stability of the column 100 can be ensured when its height is large, and the anti-overturning ability of the column 100 itself can be improved.

Referring to Fig. 1 and Fig. 4, further, a stair frame 160 is installed on the fourth side wall 140, and the staff can carry out real-time inspection and maintenance of the hoist on the stair frame 160, and at the same time, the stair frame 160 can also lift up the column 100 To the balance effect, the stability of the taller column 100 is further enhanced.

Since the design pattern of single column and double hanging basket is adopted, two hanging baskets 200 share one column 100 . The structure of the hoist is simple, and the two hanging baskets 200 obviously improve the working efficiency of the hoist. At the same time, it saves space, and the hoist can be installed and debugged in a narrow roadway. The two hanging baskets 200 can be controlled independently, the movement of the two does not interfere with each other, the equipment cost is low, and the traditional two hoisting machines can be replaced by one hoisting machine.

Referring to Fig. 5 and Fig. 6, the hoist also includes a brake anti-fall device 400, which is installed in the middle of the first slider 210 and the second slider 220, that is, one hanging basket 200 is installed with two Brake fall arrester 400. The brake drop preventer 400 is arranged opposite to the first guide rail 171 or the second guide rail 171, and is connected with the first synchronous belt 311 or the second synchronous belt 312 on the lifting mechanism 300 through the stop pin 500, the first synchronous belt 311 or the second synchronous belt The second synchronous belt 312 is also the lifting belt. In the first slider 210 , two eccentric guide wheels 252 are arranged above the brake fall protector 400 , and the other two eccentric guide wheels 252 are arranged below the brake fall protector 400 . In the second slide block 220, a concentric guide wheel 251 and an eccentric guide wheel 252 are located above the brake anti-fall device 400, and another concentric guide wheel 251 and another eccentric guide wheel 252 are located at the top of the brake anti-drop device 400. below.

Referring to FIG. 7 and FIG. 8 , the brake fall arrester 400 includes a mounting seat 410 , a fixed wedge 430 , a movable wedge 420 , a first elastic mechanism 440 and a second elastic mechanism 450 . The mounting seat 410 is fixed on the first slider 210 and the second slider 220, the movable wedge 420 is slidingly matched with the fixed wedge 430, and the movable wedge 420 is provided with a contact with the first guide rail 171 or the second guide rail 172. The wear block 426 and the stop pin 500 are installed on the top of the movable wedge 420 . The first elastic mechanism 440 is disposed between the fixed wedge 430 and the mounting seat 410 , and the second elastic mechanism 450 is disposed between the movable wedge 420 and the mounting seat 410 . When the first synchronous belt 311 or the second synchronous belt 312 breaks (that is, when the lifting belt breaks), the stop pin 500 will lose its blocking function to the movable wedge 420, and at this moment, the first elastic mechanism 440 pushes the movable wedge 420 to slide And make the wear-resistant block 426 contact with the guide structure 170, the second elastic mechanism 450 presses the movable wedge 420 against the guide structure 170 through the fixed wedge 430, the friction force between the movable wedge 420 and the guide structure 170 increases gradually Big until the hanging basket 200 stops falling.

The longitudinal section of the mounting base 410 is L-shaped. The mounting base 410 includes a first mounting body 411 and a second mounting body 412 . The first mounting body 411 and the second mounting body 412 are integrally connected and perpendicular to each other.

The first elastic mechanism 440 includes a first elastic member 441 and a tightening screw 442. One end of the first elastic member 441 abuts against the other end of the movable wedge 420 away from the stop pin 500 (i.e. the bottom of the movable wedge 420). The other end of the elastic member 441 abuts against the tightening screw 442 , and a screw hole is vertically opened on the first mounting body 411 , and the tightening screw 442 is installed in the screw hole. Specifically, the first elastic member 441 is a rectangular spring, and the rectangular spring generates an elastic force in a vertical direction (ie, the direction of the elastic force is parallel to the first guide rail 171 or the second guide rail 172 ). When the tightening screw 442 is tightened, the first elastic member 441 is compressed between the movable wedge 420 and the tightening screw 442,

The second elastic mechanism 450 includes a second elastic member 451 and a contour screw 452, one end of the second elastic member 451 is connected with the fixed wedge 430, the other end of the second elastic member 451 is connected with the contour screw 452, and the contour screw 452 It is horizontally installed in the second installation body 412 on the installation base 410 . Specifically, the second elastic member 451 is a disc spring, and the disc spring generates an elastic force in the horizontal direction (that is, the direction of the elastic force is perpendicular to the first guide rail 171 or the second guide rail 172 ). When the movable wedge 420 continuously slides relative to the fixed wedge 430 , the movable wedge 420 continuously compresses the second elastic member 451 between the fixed wedge 430 and the contour screw 452 through the fixed wedge 430 .

Referring to FIG. 7 and FIG. 8 , there are two second elastic mechanisms 450 , and the connecting line between the two second elastic mechanisms 450 is parallel to the guide structure 170 . When the number of the second elastic mechanism 450 increases, the pressure generated by the movable wedge 420 on the first guide rail 171 and the second guide rail 172 will increase under the condition that the compression amount of the second elastic member 451 is the same, thereby resulting in an increase of frictional force. The quantity of the second elastic mechanism 450 can be appropriately increased or decreased according to the needs of the actual situation (such as the total weight of the hanging basket 200 and the goods, the friction coefficient of the wear-resistant block 426, etc.).

The longitudinal cross-sectional profiles of the fixed wedge 430 and the movable wedge 420 are trapezoidal, and the fixed wedge 430 includes a first abutting surface 431, a first wedge-shaped surface 432 and two first side surfaces 433, the first abutting surface 431 and the second The elastic member 451 contacts, the first wedge-shaped surface 432 contacts the movable wedge 420 and is opposite to the first abutting surface 431 , and the two first side surfaces 433 are parallel to each other and connected between the first abutting surface 431 and the first wedge-shaped surface 432 . After installation, there is a sharp angle between the first wedge-shaped surface 432 and the vertical plane (that is, the first wedge-shaped surface 432 has a certain inclination).

The movable wedge 420 includes a second abutting surface 421 , a second wedge-shaped surface 422 , two second side surfaces 423 , a top surface 424 and a bottom surface 425 . The wear-resistant blocks 426 are installed on the second abutting surface 421 , and there are multiple wear-resistant blocks 426 arranged on the second abutting surface 421 at even intervals. The second wedge-shaped surface 422 is opposite to the second abutting surface 421 and forms a sliding fit relationship with the first wedge-shaped surface 432. The two second side surfaces 423 are parallel to each other and connected between the second abutting surface 421 and the second wedge-shaped surface 422. , the blocking pin 500 is installed on the top surface 424 , and the bottom surface 425 abuts against the first elastic member 441 . After installation, there is also a sharp angle between the second wedge-shaped surface 422 and the vertical plane (that is, there is a certain inclination in the second wedge-shaped surface 422)

The two second sides 423 on the movable wedge 420 are respectively provided with guide grooves 423a, and the guide grooves 423a are parallel to the second wedge-shaped surface 422, and the first side 433 on the fixed wedge 430 is respectively fixed with an L-shaped guide plate 460. , The L-shaped guide plate 460 cooperates with the guide groove 423a. When the movable wedge 420 slides, the sliding direction is obliquely upward, that is, the movable wedge 420 slides obliquely upward relative to the fixed wedge 430 along the first wedge-shaped surface 432 .

Since the cross-sectional dimension of the movable wedge 420 gradually decreases from top to bottom, while the cross-sectional dimension of the fixed wedge 430 gradually increases from top to bottom, when the first synchronous belt 311 or the second synchronous belt 312 breaks, the movable wedge 420 When beginning to slide upwards obliquely, the movable wedge 420 will produce both a vertical sub-displacement and a horizontal sub-displacement (that is, approaching the first guide rail 171 and the second guide rail 172), and the horizontal sub-displacement will make the movable wedge 420 guide The structures 170 are brought closer until they abut against each other. When the hanging basket 200 continues to fall, the movable wedge 420 will continue to slide upward relative to the mounting seat 410 under the joint action of the friction force between the wear-resistant block 426 and the guide structure 170 and the elastic force of the first elastic member 441 , and push the fixed wedge 430 to overcome the elastic force of the second elastic member 451 and move toward the second installation body 412 on the mounting seat 410, the second elastic member 451 is continuously compressed, and the elastic force generated by the second elastic member 451 will continue to increase, The pressing force and frictional force between the wear block 426 and the guiding structure 170 will continue to increase. Therefore, as long as the hanging basket 200 is in the falling state, the friction force between the hanging basket 200 and the guide structure 170 will gradually increase until it overcomes the gravity of the hanging basket 200 and the goods, and finally the hanging basket 200 stops sliding.

In the process of preventing the hanging basket 200 from falling, the brake fall arrester 400 does not need to consume external energy, and the hanging basket 200 can stop falling only through the friction force generated during the fall process, which simplifies the overall structure of the lock brake fall arrester 400 . At the same time, the process of stopping the hanging basket 200 from falling is a gradual process, there is a certain buffer time, and the first guide rail 171 or the second guide rail 172 will not be damaged. In the traditional fall arrester with external power, the braking force is suddenly generated, that is, the hanging basket 200 is "suddenly braked", and the braking force of the hanging basket 200 will eventually damage the guiding structure 170, thereby affecting the guiding structure 170. guide accuracy.

Furthermore, due to the effect of the second elastic member 451, when the friction forces generated between the two brake fall arresters 400 on the hanging basket 200 and the first guide rail 171 and the second guide rail 172 are not equal, the second elastic The member 451 will use its own elastic force to fine-tune the distance between the fixed wedge 430 and the mounting base 410 . In this way, the friction force between the two brake fall arresters 400 and the guide structure 170 is equal to ensure that the hanging basket 200 is evenly stressed during the falling process, and the accuracy of the first guide rail 171 and the second guide rail 172 is protected, and at the same time, the hanging basket is prevented from falling. The unbalanced force on the 200 causes the column 100 to shake violently.

Further, in order to ensure the flexibility of sliding of the movable wedge 420, the response speed of the brake fall arrester 400 is improved. The first wedge-shaped surface 432 or the second wedge-shaped surface 422 is provided with a first needle roller row (not shown), through the rolling friction of the first needle roller row, the friction between the fixed wedge 430 and the movable wedge 420 can be reduced The force facilitates the upward movement of the movable wedge 420 relative to the fixed wedge 430. The bottom surface 425 of the movable wedge 420 is also provided with a second needle roller row 470 , which is also used to reduce the frictional force between the movable wedge 420 and the first elastic mechanism 440 .

It is particularly worth mentioning that, under the condition that other components remain unchanged, only the shapes of the movable wedge 420 and the wear-resistant block 426 need to be changed to realize the compatibility of the brake anti-dropping device 400 to different types of guide structures 170, greatly The scope of application of the brake fall arrester 400 is improved. Specifically, referring to Fig. 9 and Fig. 10, when the guiding structure 170 is a linear guide rail or a trapezoidal guide rail, it is sufficient to set the second abutting surface 421 and the wear-resistant block 426 on the movable wedge 420 to be planar; refer to Fig. 11, when the guide structure 170 is a circular guide rail, the second abutting surface 421 and the wear block 426 on the movable wedge 420 are all set as concave arc surfaces; referring to Fig. 12, when the guide structure 170 is In the case of a V-shaped guide rail, the second abutting surface 421 and the wear-resistant block 426 on the movable wedge 420 are both configured as protruding V-shaped surfaces.

The technical features of the above-mentioned embodiments can be combined arbitrarily. To make the description concise, all possible combinations of the technical features in the above-mentioned embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, should be considered as within the scope of this specification.

The above-mentioned embodiments only express several implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but should not be construed as limiting the patent scope of the invention. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent for the present invention should be based on the appended claims.

Claims (10)

1. A brake anti-fall device, which is arranged opposite to the guide structure and connected with the lifting belt through a stop pin, is characterized in that it includes: The mounting seat is arranged on the hanging basket sliding along the guide structure; A fixed wedge and a movable wedge, the movable wedge is slidingly matched with the fixed wedge, the movable wedge is provided with a wear block in contact with the guide structure, the stop pin is installed on the the ends of the movable wedges; and A first elastic mechanism and a second elastic mechanism, the first elastic mechanism is arranged between the movable wedge and the mounting seat, and the second elastic mechanism is arranged between the fixed wedge and the mounting seat between; Wherein, when the lifting belt breaks and the stop pin loses its blocking function on the movable wedge, the first elastic mechanism pushes the movable wedge to slide and makes the wear-resistant block and the guide structural contact, at the same time, the second elastic mechanism presses the movable wedge against the guide structure through the fixed wedge, and the friction between the movable wedge and the guide structure gradually increases Until the hanging basket is stopped from falling. 2. The brake fall arrester according to claim 1, wherein the first elastic mechanism comprises a first elastic member and a tightening screw, and the first elastic member is arranged between the movable wedge and the Between the tightening screws, the tightening screws are installed in the screw holes provided on the mounting base; Wherein, when the tightening screw is tightened, the first elastic member is compressed between the movable wedge and the tightening screw. 3 . The brake fall arrester according to claim 2 , wherein the first elastic member is a rectangular spring, and the direction of the elastic force generated by the rectangular spring is parallel to the guiding structure. 4 . 4. The brake fall arrester according to claim 1, wherein the second elastic mechanism comprises a second elastic member and a contour screw, and the second elastic member is arranged between the fixed wedge and the fixed wedge. Between the contour screws, the contour screws are installed on the mounting base; Wherein, when the movable wedge continuously slides relative to the fixed wedge, the movable wedge continuously compresses the second elastic member between the fixed wedge and the contour screw through the fixed wedge. between. 5 . The brake fall arrester according to claim 4 , wherein the second elastic member is a disc spring, and the direction of the elastic force generated by the disc spring is perpendicular to the guiding structure. 6 . 6. The brake fall arrester according to claim 4, characterized in that, the number of the second elastic mechanisms is two, and the line between the two second elastic mechanisms is parallel to the guide structure . 7. The brake fall arrester according to claim 1, characterized in that, the longitudinal cross-sectional profiles of the fixed wedge and the movable wedge are both trapezoidal; The first abutting surface connected by the mechanism, the first wedge-shaped surface opposite to the first abutting surface and in contact with the movable wedge, and the first abutting surface and the first wedge-shaped surface connected between the two first sides; The movable wedge includes a second abutting surface for installing a wear-resistant block, a second wedge-shaped surface opposite to the second abutting surface and slidingly fitted with the first wedge-shaped surface, and a second wedge-shaped surface connected to the first wedge-shaped surface. The two second side surfaces between the two abutting surfaces and the second wedge-shaped surface, the top surface for installing the stop pin, and the bottom surface abutting against the first elastic mechanism; Guide grooves parallel to the second wedge-shaped surface are respectively provided on the two second side surfaces, and L-shaped guide plates matching the guide grooves are respectively fixedly installed on the two first side surfaces. 8. The brake fall arrester according to claim 7, characterized in that, the first wedge-shaped surface or the second wedge-shaped surface is provided with a device for reducing the gap between the fixed wedge and the movable wedge. Friction of the first row of needles. 9 . The brake fall arrester according to claim 7 , wherein a second needle roller row for reducing friction between the movable wedge and the first elastic mechanism is arranged on the bottom surface. 10 . 10. The brake fall arrester according to any one of claims 1 to 9, characterized in that, the longitudinal section of the mounting seat is L-shaped, and the mounting seat includes a vertically connected first mounting body and The second installation body, the first elastic mechanism is installed on the first installation body, and the second elastic mechanism is installed on the second installation body.