Linkage braking structure of two sets of safety tongs applied to super-large-load cargo elevator

Abstract

A linkage braking structure of two sets of safety tongs applied to an ultra-large load cargo elevator comprises two safety tongs linkage mechanisms arranged front and back, and each safety tongs linkage mechanism comprises a long lifting shaft, a short lifting shaft, a lifting arm, a lifting linkage rod and two safety tongs linkage arms. The long lifting shaft and the short lifting shaft are rotationally installed at the two ends of the car frame lower beam respectively, and the lifting arm is installed at one end of the long lifting shaft. The two safety tongs linkage arms are installed on the long lifting shaft and the short lifting shaft correspondingly. Each safety tongs linkage arm comprises a safety tongs linkage sleeve and a safety tongs linkage part. One end of the safety tongs linkage part is fixedly arranged on the safety tongs linkage sleeve, and the other end of the safety tongs linkage part is integrally provided with two tongs block connecting parts. The safety tongs linkage arm can drive the two tongs block connecting parts to swing by the same height, the two tongs blocks of the elevator safety tongs can be well linked to act synchronously, emergency braking is achieved, and the braking quality is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of elevators, in particular to a two-set safety clamp linkage braking structure applied to an ultra-large load freight elevator. Background Art

[0002] The elevator safety clamp is a safety device that, under the control of the speed limiter, will urgently stop the car and clamp it on the guide rail when a very serious fault such as overspeed or rope breakage occurs in the elevator. It provides effective protection for the safe operation of the elevator and is generally installed on the freight elevator frame. The safety clamp device consists of two parts: the safety clamp operating mechanism and the elevator safety clamp. That is, when the safety clamp mechanism is activated, the electrical mechanism is first triggered to disconnect the elevator safety circuit and stop the elevator. If the brake cannot stop the elevator, the safety clamp will further act to stop the elevator car on the guide rail.

[0003] Referring to the technical solution of patent No. CN202020272290.6, a multi-linkage safety clamp lifting mechanism is disclosed. The multi-linkage safety clamp lifting mechanism includes two longitudinal linkage shafts and multiple sets of lifting arms. The multiple sets of lifting arms are installed on each longitudinal linkage shaft, and each set of lifting arms on the same longitudinal linkage shaft is arranged at intervals for linking the corresponding safety clamps. The two corresponding lifting arms are responsible for respectively lifting the two wedges of the safety clamp to produce a braking effect, thereby achieving the purpose of synchronous braking of multiple safety clamps.

[0004] In this technical solution, two lifting arms that control the same safety clamp are first welded together with square tubes, and then the square tubes are mounted on the longitudinal linkage shaft. Although this structure can realize the installation of the two lifting arms, this method requires high welding accuracy between the square tube and the two lifting arms. When the welding accuracy is poor, the two lifting arms usually cannot achieve a completely symmetrical effect, which easily leads to inconsistent heights of the two lifting arms after swinging, and the two wedges of the safety clamp cannot be well linked to act simultaneously, thereby affecting the braking quality of the safety clamp. Utility Model Content

[0005] In order to overcome the deficiencies of the prior art, the utility model provides a two-set safety clamp linkage brake structure applied to an ultra-large load freight elevator.

[0006] The technical solution adopted by the utility model to solve its technical problems is:

[0007] The two sets of safety clamp linkage brake structure applied to an extra-large load freight elevator include two safety clamp linkage mechanisms arranged in a front-to-rear manner. The safety clamp linkage mechanism includes a lifting long axis, a lifting short axis, a lifting arm, a lifting linkage rod and two safety clamp linkage arms. The lifting long axis and the lifting short axis are respectively rotatably mounted on the two ends of the lower beam of the car frame, and the lifting arm is mounted on one end of the lifting long axis; the two safety clamp linkage arms are respectively mounted on the lifting long axis and the lifting short axis, and a braking synchronous linkage rod is commonly connected between the lifting long axes of the two safety clamp brake mechanisms to enable them to rotate synchronously; it is characterized in that: the safety clamp linkage arm includes a safety clamp linkage sleeve and a safety clamp linkage part, and the safety clamp linkage sleeves of the two safety clamp linkage arms are respectively fixed on the lifting long axis and the lifting short axis; one end of the safety clamp linkage part is fixed on the safety clamp linkage sleeve, and the other end is integrally formed with two clamp block connecting parts symmetrically arranged front and back, and the two clamp block connecting parts are respectively connected and cooperated with the two clamp blocks of the elevator safety clamp.

[0008] In the utility model, the safety clamp linkage part and the two clamp block connecting parts form a "Y" structure, and the clamp block connecting parts are provided with safety clamp linkage oblong holes.

[0009] In the utility model, the upper top surface and / or the lower bottom surface of the safety clamp linkage part is provided with a linkage reinforcement protrusion, and the linkage reinforcement protrusion is fixed on the safety clamp linkage part. One end of the linkage reinforcement protrusion extends close to the clamp block connecting part, and the other end is fixed on the safety clamp linkage sleeve.

[0010] In the utility model, the safety gear linkage part is used to connect the safety gear linkage sleeve. One end of the linkage sleeve is protruded with a reinforced connection part located at the front and rear sides thereof. The reinforced connection part is fixedly connected to the outer peripheral surface of the safety gear linkage sleeve.

[0011] In the utility model, a brake connection hole is provided in the brake synchronous linkage rod for inserting one end of the lifting shaft. After one end of the lifting shaft is inserted into the brake connection hole, it is fixedly connected to the brake synchronous linkage rod by bolt connection or welding.

[0012] In the utility model, the brake connection hole extends along the axial direction of the brake synchronous linkage rod and passes through the front and rear ends of the brake synchronous linkage rod, and one end of the two lifting long shafts is inserted from the front and rear ends of the brake connection hole respectively.

[0013] In the utility model, the lifting linkage rod includes a left brake strut rod connected to the lifting long shaft, a right brake strut rod connected to the lifting short shaft, and a strut rod connecting long nut connecting the left brake strut rod and the right brake strut rod.

[0014] The beneficial effects of the utility model are as follows: the safety clamp linkage arm of the utility model comprises a safety clamp linkage sleeve and a safety clamp linkage part, wherein the safety clamp linkage part is integrally formed with two front-and-rear symmetrical clamp block connecting parts, the two clamp block connecting parts are respectively used to connect and cooperate with the two clamp blocks of the elevator safety clamp, the structure adopts an integral molding method to fix the two clamp block connecting parts on the safety clamp linkage part, and the overall strength and connection accuracy between them are high, so that when the safety clamp linkage arm is actuated, the safety clamp linkage arm can drive the two clamp block connecting parts to swing to the same height, and the two clamp blocks of the elevator safety clamp are well linked to move synchronously, thereby realizing emergency braking and effectively improving the braking quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0016] Figure 1 A three-dimensional diagram showing two sets of safety tongs linkage brake structures installed on the lower beam of the car frame;

[0017] Figure 2 It is a three-dimensional diagram of the linkage brake structure of two sets of safety calipers;

[0018] Figure 3 It is a schematic diagram of the connection between the lifting long axis and various components;

[0019] Figure 4 It is a three-dimensional diagram of the safety gear linkage arm;

[0020] Figure 5 This is a schematic diagram of the connection between the lifting short shaft and various components. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the embodiments of the present utility model clearer, the technical solution in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model.

[0022] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, top, bottom, inside, outside, vertical, horizontal, longitudinal, counterclockwise, clockwise, circumferential, radial, axial...), then the directional indication is only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0023] In addition, if the embodiments of the present utility model involve descriptions such as "first" or "second", etc., the descriptions of "first" or "second", etc. are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments may be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0024] Referring to Figures 1-5 , a two - set safety - gear linkage braking structure applied to an extra - large load freight elevator, includes two safety - gear linkage mechanisms 100 arranged in the front - to - rear direction. The two safety - gear linkage mechanisms 100 are respectively installed on the lower beams 200 of two carriages; the safety - gear linkage mechanism 100 includes a long pull shaft 1, a short pull shaft 2, a pull - up arm 3, a pull - up linkage rod 4, and two safety - gear linkage arms 5. The long pull shaft 1 and the short pull shaft 2 are respectively rotatably installed at both ends of the lower beam 200 of the carriage. The pull - up arm 3 is installed at one end of the long pull shaft 1. The pull - up arm 3 is used to connect with the speed - limiter rope of the speed limiter. When the freight elevator has an abnormality and the speed limiter acts to clamp the speed - limiter rope with the clamping tongs, as the elevator carriage continues to move, the speed - limiter rope drives the pull - up arm 3 to drive the long pull shaft 1 to rotate, so that the safety - gear linkage mechanism 100 works; each safety - gear linkage arm 5 is cooperatively connected to control the action of an elevator safety gear installed on the carriage column. The two safety - gear linkage arms 5 are respectively installed on the long pull shaft 1 and the short pull shaft 2. One of the safety - linkage arms is driven by the long pull shaft 1 to rotate, and the other safety - gear linkage arm 5 is driven by the short pull shaft 2 to rotate. The long pull shaft 1 drives the short pull shaft 2 to rotate through the pull - up linkage rod 4. A braking synchronous linkage rod 6 for synchronously rotating them is commonly connected between the long pull shafts 1 of the two safety - gear braking mechanisms.

[0025] Furthermore, the safety - gear linkage arm 5 includes a safety - gear linkage sleeve 51 and a safety - gear linkage part 52. The safety - gear linkage sleeves 51 of the two safety - gear linkage arms 5 are respectively sleeved and fixed on the long pull shaft 1 and the short pull shaft 2; one end of the safety - gear linkage part 52 is fixedly arranged on the safety - gear linkage sleeve 51, and the other end is integrally formed with two symmetrically arranged front - and - rear clamp - block connection parts 53. The two clamp - block connection parts 53 are respectively connected and cooperated with the two clamp blocks of the elevator safety gear, so that when the safety - gear linkage arm 5 acts, it can drive the two clamp blocks of the elevator safety gear to act, thereby realizing emergency braking.

[0026] The safety clamp linkage arm 5 of the utility model comprises a safety clamp linkage sleeve 51 and a safety clamp linkage part 52, wherein the safety clamp linkage part 52 is integrally formed with two front-to-back symmetrical clamp block connecting parts 53, and the two clamp block connecting parts 53 are respectively used to connect and cooperate with the two clamp blocks of the elevator safety clamp. The structure adopts an integral molding method to fix the two clamp block connecting parts 53 on the safety clamp linkage part 52, and the overall strength and connection accuracy between them are high. Therefore, when the safety clamp linkage arm 5 is in motion, the safety clamp linkage arm 5 can drive the two clamp block connecting parts 53 to swing to the same height, and the two clamp blocks of the elevator safety clamp are well linked to move synchronously, thereby realizing emergency braking and effectively improving the braking quality.

[0027] In this embodiment, the safety clamp linkage part 52 and the two clamp block connecting parts 53 form a "Y" structure, and the clamp block connecting part 53 is provided with a safety clamp linkage oblong hole 531, and the clamp block of the elevator safety clamp is provided with a clamp block linkage member for inserting into the safety clamp linkage oblong hole 531. When the clamp block connecting part 53 is actuated, it can link the clamp block linkage member to drive the clamp block of the elevator safety clamp to move.

[0028] In this embodiment, the upper top surface and / or the lower bottom surface of the safety clamp linkage part 52 is provided with a linkage reinforcement protrusion 521, and the linkage reinforcement protrusion 521 is fixed on the safety clamp linkage part 52, one end of the linkage reinforcement protrusion 521 extends close to the clamp block connection part 53, and the other end is fixed on the safety clamp linkage sleeve 51, so as to enhance the anti-deformation ability of the safety clamp linkage part 52 and enhance the stability of the safety clamp linkage part 52 when connected to the safety clamp linkage sleeve 51 by utilizing the effect of the linkage reinforcement protrusion 521. In addition, in order to further enhance the connection stability between the safety clamp linkage part 52 and the safety clamp linkage sleeve 51, the upper protrusion of one end of the safety clamp linkage part 52 for connecting the safety clamp linkage sleeve 51 is provided with a reinforcement connection part 522 located on the front and rear sides thereof, and the reinforcement connection part 522 is fixedly connected to the outer peripheral surface of the safety clamp linkage sleeve 51.

[0029] In this embodiment, a brake connection hole is provided in the brake synchronous linkage rod 6 for inserting one end of the lifting long shaft 1. After one end of the lifting long shaft 1 is inserted into the brake connection hole, it is fixedly connected with the brake synchronous linkage rod 6 by bolt connection or welding, so that the lifting long shaft 1 and the brake synchronous linkage rod 6 are fixed together. Specifically, the brake connection hole extends along the axial direction of the brake synchronous linkage rod 6 and passes through the front and rear ends of the brake synchronous linkage rod 6, and one end of the two lifting long shafts 1 is respectively inserted from the front and rear ends of the brake connection hole.

[0030] In this embodiment, the lifting linkage rod 4 includes a left brake strut 41 that is transmission-connected to the lifting long axis 1, a right brake strut 42 that is transmission-connected to the lifting short axis 2, and a strut connecting long nut 43 that connects the left brake strut 41 with the right brake strut 42. The left brake strut 41 includes a left strut hinge seat at one end thereof and a left strut screw segment at the other end thereof. The right brake strut 42 includes a right strut hinge seat at one end thereof and a right strut screw segment at the other end thereof. A left strut rocker arm 11 that is driven to rotate by the lifting long axis 1 is fixedly installed on the lifting long axis 1, and the end of the left strut rocker arm 11 that is away from the lifting long axis 1 is hinged to the left strut hinge seat. A right strut rocker arm 21 that is driven to rotate by the lifting short axis 2 is fixedly installed on the lifting short axis 2. One end of the rod rocker arm 21 away from the lifting short shaft 2 is hinged to the right support rod hinge seat; the two ends of the support rod connecting long nut 43 are respectively provided with a first screw hole and a second screw hole extending along the axial direction, and the thread rotation direction of the first screw hole is opposite to the thread rotation direction of the second screw hole, and the left support rod screw section has at least a part of the thread adapted to the first screw hole, and the right support rod screw section has at least a part of the thread fitted in the second screw hole; by rotating the support rod connecting long nut 43, the left brake support rod 41 and the right brake support rod 42 can be moved toward and away from each other to adjust the distance between the left brake support rod 41 and the right brake support rod 42, thereby changing the length of the brake synchronization linkage rod 6, so as to better make the two safety clamp linkage arms 5 of the same safety clamp linkage mechanism 100 move synchronously.

[0031] In this embodiment, the car frame lower beam 200 includes two front-to-back symmetrical car frame lower beam bodies 201, and a swing space is formed between the two car frame lower beam bodies 201. The length of the left brake strut 41 is greater than the length of the right brake strut 42. The safety clamp braking mechanism also includes at least one strut supporting member 7, and the strut supporting member 7 is installed on one of the car frame lower beam bodies 201. The strut supporting member 7 is provided with a strut bracket groove for the left brake strut 41 to pass through. The strut supporting member 7 is used to support the left brake strut 41 to avoid the problem of the left brake strut 41 being too long and bending.

[0032] In this embodiment, the lifting long axis 1 and the lifting short axis 2 are each equipped with two lifting axis seats 8, and the two lifting axis seats 8 are fixedly mounted on the two lower beam bodies 201 of the car frame lower beam 200, and the lifting long axis 1 and the lifting short axis 2 can both rotate relative to the lifting axis seats 8.

[0033] In this embodiment, the safety gear braking mechanism further includes a strut return seat 91, which is installed on one of the lower beam bodies 201 of the car frame. A strut return through hole for the left braking strut 41 to pass through is provided on the strut return seat 91. A strut return spring 92 is sleeved on the left braking strut 41. A strut return nut 93 is in threaded fit with the left strut screw section. Both ends of the strut return spring 92 are limited by the strut return seat 91 and the strut return nut 93 respectively. After the lifting linkage rod 4 acts, the strut return spring 92 drives the lifting linkage rod 4 to reset.

[0034] The above are only the preferred embodiments of the present invention. As long as the technical solutions that achieve the purpose of the present invention by basically the same means fall within the protection scope of the present invention.

Claims

1. A two - set safety gear linkage braking structure applied to an extra - large load freight elevator, including two safety gear linkage mechanisms (100) arranged in the front - to - rear direction. The safety gear linkage mechanism (100) includes a long pull shaft (1), a short pull shaft (2), a pull arm (3), a pull linkage rod (4), and two safety gear linkage arms (5). The long pull shaft (1) and the short pull shaft (2) are respectively rotatably installed at both ends of the lower beam (200) of the car frame. The pull arm (3) is installed at one end of the long pull shaft (1). The two safety gear linkage arms (5) are respectively installed on the long pull shaft (1) and the short pull shaft (2). A braking synchronous linkage rod (6) for synchronously rotating them is commonly connected between the long pull shafts (1) of the two safety gear braking mechanisms. It is characterized in that: The safety clamp linkage arm (5) comprises a safety clamp linkage sleeve (51) and a safety clamp linkage part (52); the safety clamp linkage sleeves (51) of the two safety clamp linkage arms (5) are respectively sleeved and fixed on the lifting long shaft (1) and the lifting short shaft (2); one end of the safety clamp linkage part (52) is fixed on the safety clamp linkage sleeve (51), and the other end is integrally formed with two clamp block connecting parts (53) arranged symmetrically in front and back, and the two clamp block connecting parts (53) are respectively connected and matched with the two clamp blocks of the elevator safety clamp.

2. The two - set safety - gear linkage braking structure applied to an extra - heavy load freight elevator according to claim 1, wherein: The safety clamp linkage portion (52) and the two clamp block connecting portions (53) form a "Y" structure, and the clamp block connecting portions (53) are provided with safety clamp linkage oblong holes (531).

3. A two - set safety gear linkage braking structure applied to an extra - heavy load freight elevator according to claim 1, characterized in that: The upper top surface and / or the lower bottom surface of the safety clamp linkage part (52) are provided with a linkage reinforcement convex portion (521), the linkage reinforcement convex portion (521) is fixed on the safety clamp linkage part (52), one end of the linkage reinforcement convex portion (521) extends close to the clamp block connection part (53), and the other end is fixed on the safety clamp linkage sleeve (51).

4. A two-set safety gear linkage braking structure applied to an extra-large load freight elevator according to claim 3, characterized in that: The safety clamp linkage portion (52) is used to connect to one end of the safety clamp linkage sleeve (51), and a protrusion is provided with a reinforcement connection portion (522) located at the front and rear sides thereof. The reinforcement connection portion (522) is fixedly connected to the outer peripheral surface of the safety clamp linkage sleeve (51).

5. A two-set safety gear linkage braking structure applied to an extra-large load freight elevator according to claim 1, characterized in that: The brake synchronous linkage rod (6) is provided with a brake connection hole for inserting one end of the lifting long shaft (1). After one end of the lifting long shaft (1) is inserted into the brake connection hole, it is fixedly connected to the brake synchronous linkage rod (6) by bolt connection or welding.

6. The two sets of safety gear linkage braking structures applied to extra-large load freight elevators according to claim 5 are characterized in that: The brake connection hole extends along the axial direction of the brake synchronization linkage rod (6) and penetrates the front and rear ends of the brake synchronization linkage rod (6), and one end of the two lifting long shafts (1) is respectively inserted from the front and rear ends of the brake connection hole.

7. A two - set safety gear linkage braking structure applied to an extra - heavy load freight elevator according to claim 1, characterized in that: The lifting linkage rod (4) comprises a left brake support rod (41) drivingly connected to the lifting long shaft (1), a right brake support rod (42) drivingly connected to the lifting short shaft (2), and a support rod connecting long nut (43) connecting the left brake support rod (41) and the right brake support rod (42) together.

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