Four-set safety gear linkage braking structure applied to super-large-load cargo elevator

Abstract

A four-safety-gear linkage braking structure applied to an ultra-large-load cargo elevator comprises four safety gear linkage mechanisms arranged front and back, and each safety gear linkage mechanism comprises a long lifting shaft, a short lifting shaft, a lifting linkage rod and two safety gear linkage arms; the lifting linkage rod comprises a left supporting rod, a right supporting rod and a supporting rod long nut, the left supporting rod comprises a left hinge seat and a left screw rod section, and the left hinge seat is in transmission connection with the lifting long shaft; the right supporting rod comprises a right hinge seat and a right screw section, and the right hinge seat is in transmission connection with the lifting short shaft; a first screw hole and a second screw hole which extend in the axial direction are formed in the two ends of the stay bar long nut respectively, at least part of threads of the left screw section are matched with the interior of the first screw hole, and at least part of threads of the right screw section are matched with the interior of the second screw hole. According to the utility model, the connection with other parts does not need to be disconnected, the operation steps are simplified, the adjustment difficulty is reduced, the adjustment efficiency is improved, and the time cost is reduced.

Description

Technical Field

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

[0002] In order to meet the emergency braking requirements of oversized freight elevators, existing freight elevator frames are usually equipped with multiple sets of safety clamp devices for braking.

[0003] Referring to the technical solution disclosed in patent number 202020272290.6, a multi-linkage safety clamp lifting mechanism is disclosed. The multi-linkage safety clamp lifting mechanism includes two sets of mounting seats, two longitudinal linkage shafts, multiple sets of lifting arms, trigger members and at least two transverse linkage shafts. Multiple sets of lifting arms are installed on each longitudinal linkage shaft. Each set of lifting arms on the same longitudinal linkage shaft is arranged at intervals to link the corresponding safety clamps. The two corresponding lifting arms are responsible for lifting the two wedges of the safety clamp respectively to produce a braking effect, thereby achieving the purpose of synchronous braking of multiple safety clamps. The transverse linkage shaft includes a swing section and a connecting section. The swing section is distributed at both ends of the transverse linkage shaft and is hinged to the longitudinal linkage shaft, so that the transverse linkage shaft can link the lifting arms on the two longitudinal linkage shafts to move synchronously. The end of the swing section used to connect to the connecting section has an external thread, and the part of the connecting section used to connect to the swing section has an internal thread. The length of the transverse linkage shaft is adjusted by threaded cooperation and the length of the thread screwed in is controlled as needed, and the position is tightened by the locking nut on the swing section.

[0004] The above-mentioned structural solution can adjust the length of the transverse linkage shaft to meet the transmission requirements. However, there are still certain shortcomings during use. For example, the internal thread in the connecting section is adapted to the external thread of the swing section. When the connecting section is rotated, one of the swing sections is in an internal thread position that is screwed out of the connecting section, while the other is in an internal thread position that is screwed into the connecting section. Therefore, when adjusting, the worker can only rotate the two swing sections in sequence to make the depth of the two swing sections in the connecting section basically consistent, ensuring the quality of the cooperation between the swing section and the connecting section. However, this also increases the difficulty and time cost of adjustment. Moreover, this adjustment method usually requires temporarily disconnecting the swing section from the longitudinal linkage shaft so that the swing section can be freely rotated for adjustment. This step not only increases the complexity of the operation, but may also cause unnecessary disturbances to the already installed structure, and even affect the stability and reliability of the entire multi-linkage safety clamp lifting mechanism. In addition, frequent disassembly and reinstallation may also accelerate the wear of components and shorten the service life of components. Utility Model Content

[0005] In order to overcome the deficiencies of the prior art, the utility model provides a four-set safety tongs 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] A four-set safety clamp linkage brake structure used in an ultra-large load freight elevator includes four safety clamp linkage mechanisms arranged in a front-to-rear arrangement. The safety clamp linkage mechanisms include a lifting long shaft, a lifting short shaft, a lifting arm, a lifting linkage rod, and two safety clamp linkage arms. The lifting arm is mounted on one end of the lifting long shaft.

[0008] The two safety gear linkage arms are respectively installed on the lifting long axis and the lifting short axis, and a brake linkage rod is commonly connected between the two adjacent lifting long axes; the characteristics are:

[0009] The lifting linkage rod includes a left support rod, a right support rod and a support rod long nut. The left support rod includes a left hinge seat at one end thereof and a left screw segment at the other end thereof. The left hinge seat is transmission-connected to the lifting long shaft.

[0010] The right support rod includes a right hinge seat at one end thereof and a right screw segment at the other end thereof, and the right hinge seat is transmission-connected to the lifting short shaft;

[0011] The two ends of the support rod long nut are respectively provided with a first screw hole and a second screw hole extending along the axial direction, the rotation direction of the screw thread of the first screw hole is opposite to the rotation direction of the screw thread of the second screw hole, at least part of the thread of the left screw segment is adapted to the first screw hole, and at least part of the thread of the right screw segment is adapted to the second screw hole.

[0012] In the present invention, a left rocker arm is fixedly installed on the lifting long axis and rotates synchronously therewith, and the end of the left rocker arm away from the lifting long axis is hinged to the left articulated seat; a right rocker arm is fixedly installed on the lifting short axis and rotates synchronously therewith, and the end of the right rocker arm away from the lifting short axis is hinged to the right articulated seat.

[0013] In the present utility model, the safety clamp linkage mechanism also includes a lifting monitoring switch for monitoring whether the lifting short shaft rotates. A monitoring mating part is fixedly installed on the lifting short shaft for cooperating with the lifting monitoring switch to detect whether the lifting short shaft rotates. The monitoring mating part is configured to rotate synchronously with the lifting short shaft.

[0014] In the utility model, the lifting monitoring switch is provided with a safety clamp detection seat for mounting the lifting monitoring switch on the lower beam of the car frame.

[0015] In the present invention, the monitoring fitting is a circular wheel that is fixedly mounted on the lifting short shaft, and a detection avoidance recess is provided on the outer circumferential surface of the monitoring fitting.

[0016] In the present invention, the cross section of the detection avoidance recess is V-shaped.

[0017] In the present invention, the outer contour of the support rod long nut is square, hexagonal or octagonal.

[0018] In the present invention, the safety clamp braking mechanism further comprises at least one strut support member mounted on the lower beam of the car frame, and the strut support member is provided with a strut bracket groove for the left strut to pass through.

[0019] In the present invention, two lifting shaft seats are mounted on the lifting long shaft and the lifting short shaft, and both the lifting long shaft and the lifting short shaft can rotate relative to the lifting shaft seats.

[0020] In the utility model, the safety clamp braking mechanism also includes a strut reset seat, which is installed on the lower beam of the car frame. The strut reset seat is provided with a strut reset through hole for the left strut to pass through. The left strut is sleeved with a strut reset spring, and the left screw segment is threaded with a strut reset nut. The two ends of the strut reset spring are respectively limited by the strut reset seat and the strut reset nut.

[0021] The beneficial effects of the present invention are as follows: the two ends of the long nut of the support rod of the present invention are respectively provided with a first screw hole and a second screw hole extending along the axial direction, and the rotation direction of the screw thread of the first screw hole is opposite to the rotation direction of the screw thread of the second screw hole, so that the length of the lifting linkage rod can be quickly adjusted by rotating the long nut of the support rod without disconnecting the connection with other components, which simplifies the operation steps, reduces the difficulty of adjustment, improves the adjustment efficiency, and reduces the time cost; and there is no need to change the connection method between the lifting linkage rod and other components during the adjustment process, thereby ensuring the overall stability and reliability of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention is further described below with reference to the accompanying drawings and embodiments:

[0023] Figure 1 This is a three-dimensional diagram of four sets of safety tongs linked brake structures installed on the lower beam of the car frame;

[0024] Figure 2 This is a three-dimensional diagram of the four sets of safety calipers linked brake structure;

[0025] Figure 3 This is a schematic diagram of the connection between the lifting long axis and various components;

[0026] Figure 4 It is a schematic diagram of the connection between the lifting short shaft and various components;

[0027] Figure 5 This is a structural diagram of the safety gear linkage mechanism installed on the lower beam of the car frame;

[0028] Figure 6 This is the installation diagram of the lifting monitoring switch. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention.

[0030] 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 indications are only used to explain the relative position relationship, movement status, etc. between the various components in a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0031] In addition, if there are descriptions involving "first" or "second" in the embodiments of the present invention, the descriptions of "first" or "second" are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features specified as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that ordinary technicians in this field can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0032] Reference Figure 1-6 A four-set safety clamp linkage brake structure used in an extra-large load freight elevator includes four safety clamp linkage mechanisms 100 arranged in a front-to-rear manner. The four safety clamp linkage mechanisms 100 are respectively installed on the lower beams 200 of different car frames. The safety clamp linkage mechanism 100 includes a lifting long shaft 1, a lifting short shaft 2, a lifting arm 3, a lifting linkage rod 4 and two safety clamp linkage arms 5. The lifting long shaft 1 and the lifting short shaft 2 are respectively rotatably installed on the two ends of the lower beam 200 of the car frame. The lifting arm 3 is installed on one end of the lifting long shaft 1. The lifting arm 3 is used to connect with the speed limiter rope of the speed limiter.

[0033] Furthermore, each safety clamp linkage arm 5 cooperates to connect and control the action of an elevator safety clamp installed on a car frame column. The two safety clamp linkage arms 5 are respectively installed on the lifting long shaft 1 and the lifting short shaft 2. One of the safety clamp linkage arms 5 is driven to rotate by the lifting long shaft 1, and the other safety clamp linkage arm 5 is driven to rotate by the lifting short shaft 2. The lifting long shaft 1 is connected to the lifting short shaft 2 through the lifting linkage rod 4, and drives the lifting short shaft 2 to rotate synchronously with it. The two adjacent lifting long shafts 1 in front and behind are commonly connected with a brake linkage rod 6 to make them rotate synchronously.

[0034] Furthermore, the lifting linkage rod 4 includes a left support rod 41, a right support rod 42 and a support rod long nut 43. The left support rod 41 includes a left hinge seat at one end thereof and a left screw segment at the other end thereof, and the left hinge seat is transmission-connected to the lifting long shaft 1; the right support rod 42 includes a right hinge seat at one end thereof and a right screw segment at the other end thereof, and the right hinge seat is transmission-connected to the lifting short shaft 2; the two ends of the support rod long nut 43 are respectively provided with a first screw hole and a second screw hole extending in the axial direction, the screw thread rotation direction of the first screw hole and the screw thread rotation direction of the second screw hole are opposite, the left screw segment has at least a part of its thread adapted to the first screw hole, and the right screw segment has at least a part of its thread adapted to the second screw hole. In addition, the left screw segment and the right screw segment can also be threadedly adapted with a locking nut adapted to their thread, so that after the adjustment is completed, the locking nut can be tightened against the support rod long nut 43 to ensure the stability of the lifting linkage rod 4.

[0035] The two ends of the support rod long nut 43 of this embodiment are respectively provided with a first screw hole and a second screw hole extending in the axial direction, and the rotation direction of the screw thread of the first screw hole is opposite to the rotation direction of the screw thread of the second screw hole. In this way, the length of the lifting linkage rod 4 can be quickly adjusted by rotating the support rod long nut 43 without disconnecting the connection with other components, which simplifies the operation steps, reduces the adjustment difficulty, improves the adjustment efficiency, and reduces the time cost; and there is no need to change the connection method between the lifting linkage rod 4 and other components during the adjustment process, thereby ensuring the overall stability and reliability of the equipment.

[0036] As a preferred embodiment, in order to facilitate the adjustment of the length of the lifting linkage rod 4 by rotating the long support rod nut 43 with an open-end wrench, the outer contour of the long support rod nut 43 is a square, a hexagon or an octagon.

[0037] As a preferred embodiment, a left rocker arm 11 is fixedly installed on the lifting long shaft 1 and rotates synchronously therewith, and the end of the left rocker arm 11 away from the lifting long shaft 1 is hinged to the left hinge seat; a right rocker arm 21 is fixedly installed on the lifting short shaft 2 and rotates synchronously therewith, and the end of the right rocker arm 21 away from the lifting short shaft 2 is hinged to the right hinge seat, so that when the lifting long shaft 1 rotates, the lifting short shaft 2 can be driven to rotate synchronously under the action of the left rocker arm 11, the lifting linkage rod 4 and the right rocker arm 21.

[0038] As a preferred embodiment, the safety clamp linkage mechanism 100 also includes a lifting monitoring switch 60 for monitoring whether the lifting short shaft 2 is rotating. The lifting monitoring switch 60 is provided with a safety clamp detection seat 7 for installing it on the lower beam 200 of the car frame. The lifting short shaft 2 is fixedly installed with a monitoring mating component 8 for cooperating with the lifting monitoring switch 60 to detect whether the lifting short shaft 2 is rotating. The monitoring mating component 8 is configured to rotate synchronously with the lifting short shaft 2.

[0039] As a preferred embodiment, the monitoring fitting 8 is a circular wheel that is fixed on the lifting short shaft 2, and the monitoring pressing end of the lifting monitoring switch 60 faces the outer circumference of the monitoring fitting 8, and a detection avoidance recess 81 is provided on the outer circumference of the monitoring fitting 8; and in order to facilitate the monitoring pressing end of the lifting monitoring switch 60 to exit the detection avoidance recess 81, the cross-section of the detection avoidance recess 81 is V-shaped; when the monitoring pressing end of the lifting monitoring switch 60 extends into the detection avoidance recess 81, the lifting monitoring switch 60 does not send a safety clamp action signal; when the lifting short shaft 2 rotates and drives the safety clamp linkage arm 5 to move, the monitoring fitting 8 rotates synchronously and presses the monitoring pressing end of the lifting monitoring switch 60, so that the lifting monitoring switch 60 sends a control safety clamp action signal to the elevator control cabinet that controls the elevator operation, completing the detection action, and the elevator control cabinet controls the elevator safety circuit to disconnect. Of course, in other embodiments, it can also be configured that when the monitoring pressing end of the lifting monitoring switch 60 extends into the detection avoidance recess 81, the lifting monitoring switch 60 sends a safety clamp action signal.

[0040] As a preferred embodiment, the safety clamp linkage arm 5 includes 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 fixed on the lifting long axis 1 and the lifting short axis 2; one end of the safety clamp linkage part 52 is fixed on the safety clamp linkage sleeve 51, and the other end is provided with two clamp block connecting parts 53 symmetrically arranged front and back. The two clamp block connecting parts 53 are respectively connected and cooperated with the two clamp blocks of the elevator safety clamp, so that when the safety clamp linkage arm 5 is actuated, the two clamp blocks of the elevator safety clamp can be linked to move, thereby realizing emergency braking.

[0041] In this embodiment, a safety clamp linkage oblong hole is provided on the clamp block connecting portion 53, and a clamp block of the elevator safety clamp is provided with a clamp block linkage member for inserting into the safety clamp linkage oblong hole. When the clamp block connecting portion 53 moves, the clamp block linkage member can be linked to drive the clamp block of the elevator safety clamp to move.

[0042] In this embodiment, the brake linkage rod 6 is provided with a brake connection hole for inserting one end of the lifting shaft 1. After one end of the lifting shaft 1 is inserted into the brake connection hole, it is fixedly connected to the brake linkage rod 6 by bolting or welding, thereby fixing the lifting shaft 1 and the brake linkage rod 6 together. Specifically, the brake connection hole extends along the axial direction of the brake linkage rod 6 and passes through the front and rear ends of the brake linkage rod 6. One end of the two lifting shafts 1 is inserted from the front and rear ends of the brake connection hole respectively.

[0043] In this embodiment, the safety clamp braking mechanism also includes at least one strut support member 9 installed on the lower beam 200 of the car frame. The strut support member 9 is provided with a strut bracket groove for the left strut 41 to pass through. The strut support member 9 is used to support the left strut 41 to prevent the left strut 41 from being too long and bending.

[0044] In this embodiment, the lifting long shaft 1 and the lifting short shaft 2 are both equipped with two lifting shaft seats 10, and the two lifting shaft seats 10 are fixedly installed on the two car frame lower beams 200 of the car frame. The lifting long shaft 1 and the lifting short shaft 2 can both rotate relative to the lifting shaft seats 10.

[0045] In this embodiment, the safety caliper brake mechanism further includes a strut reset seat 20, which is mounted on the lower beam 200 of the car frame. The strut reset seat 20 is provided with a strut reset through-hole for a left strut 41 to pass through. A strut reset spring 30 is mounted on the left strut 41, and a strut reset nut 40 is threadedly engaged with the left screw segment. The two ends of the strut reset spring 30 are respectively restrained by the strut reset seat 20 and the strut reset nut 40. After the lifting linkage rod 4 is actuated, the strut reset spring 30 drives the lifting linkage rod 4 to reset.

[0046] The above description is only a preferred embodiment of the present invention. Any technical solution that achieves the purpose of the present invention by substantially the same means shall fall within the scope of protection of the present invention.

Claims

1. A four-set safety clamp linkage brake structure used in an extra-large load freight elevator, comprising four safety clamp linkage mechanisms (100) arranged in a front-to-rear arrangement, wherein the safety clamp linkage mechanism (100) comprises a lifting long shaft (1), a lifting short shaft (2), a lifting arm (3), a lifting linkage rod (4) and two safety clamp linkage arms (5), wherein the lifting arm (3) is mounted on one end of the lifting long shaft (1); Two safety clamp linkage arms (5) are respectively mounted on the lifting long shaft (1) and the lifting short shaft (2), and a brake linkage rod (6) is commonly connected between the two adjacent lifting long shafts (1); the characteristics are: The lifting linkage rod (4) includes a left support rod (41), a right support rod (42) and a support rod long nut (43), the left support rod (41) includes a left hinge seat at one end thereof and a left screw segment at the other end thereof, and the left hinge seat is transmission-connected to the lifting long shaft (1); The right support rod (42) includes a right hinge seat at one end thereof and a right screw segment at the other end thereof, and the right hinge seat is transmission-connected to the lifting short shaft (2); The two ends of the support rod long nut (43) are respectively provided with a first screw hole and a second screw hole extending in the axial direction, the screw thread rotation direction of the first screw hole is opposite to the screw thread rotation direction of the second screw hole, at least part of the thread of the left screw segment is adapted to the first screw hole, and at least part of the thread of the right screw segment is adapted to the second screw hole.

2. The four-set safety tongs linkage brake structure used in an ultra-large load freight elevator according to claim 1 is characterized in that: A left rocker arm (11) is fixedly mounted on the lifting long axis (1) and rotates synchronously therewith, and one end of the left rocker arm (11) away from the lifting long axis (1) is hinged to the left articulated seat; a right rocker arm (21) is fixedly mounted on the lifting short axis (2) and rotates synchronously therewith, and one end of the right rocker arm (21) away from the lifting short axis (2) is hinged to the right articulated seat.

3. The four-set safety tongs linkage brake structure used in an ultra-large load freight elevator according to claim 1 is characterized in that: The safety clamp linkage mechanism (100) further includes a lifting monitoring switch (60) for monitoring whether the lifting short shaft (2) is rotating. A monitoring mating component (8) is fixedly mounted on the lifting short shaft (2) for cooperating with the lifting monitoring switch (60) to detect whether the lifting short shaft (2) is rotating. The monitoring mating component (8) is configured to rotate synchronously with the lifting short shaft (2).

4. The four-set safety tongs linkage brake structure used in an ultra-large load freight elevator according to claim 3 is characterized in that: The lifting monitoring switch (60) is provided with a safety clamp detection seat (7) for mounting it on the lower beam (200) of the car frame.

5. The four-set safety tongs linkage brake structure used in an ultra-large load freight elevator according to claim 3 is characterized in that: The monitoring fitting (8) is a circular wheel that is fixedly mounted on the lifting short shaft (2), and a detection avoidance recess (81) is provided on the outer circumferential surface of the monitoring fitting (8).

6. The four-set safety tongs linkage brake structure used in an ultra-large load freight elevator according to claim 3 is characterized in that: The cross section of the detection avoidance recess (81) is V-shaped.

7. The four-set safety tongs linkage brake structure used in an ultra-large load freight elevator according to claim 1 is characterized in that: The outer contour of the support rod long nut (43) is a square, a hexagon or an octagon.

8. The four-set safety tongs linkage brake structure used in an ultra-large load freight elevator according to claim 1 is characterized in that: The safety clamp braking mechanism further comprises at least one strut support member (9) mounted on the lower beam (200) of the car frame, wherein the strut support member (9) is provided with a strut bracket slot for the left strut (41) to pass through.

9. The four-set safety tongs linkage brake structure used in an ultra-large load freight elevator according to claim 1 is characterized in that: The lifting long shaft (1) and the lifting short shaft (2) are both mounted with two lifting shaft seats (10), and the lifting long shaft (1) and the lifting short shaft (2) are both rotatable relative to the lifting shaft seats (10).

10. The four-set safety tongs linkage brake structure used in an ultra-large load freight elevator according to claim 1, characterized in that: The safety clamp braking mechanism further comprises a strut reset seat (20), wherein the strut reset seat (20) is mounted on a lower beam (200) of the car frame, and a strut reset through hole for a left strut (41) to pass through is provided on the strut reset seat (20), a strut reset spring (30) is sleeved on the left strut (41), a strut reset nut (40) is threadedly engaged on the left screw section, and both ends of the strut reset spring (30) are respectively limited by the strut reset seat (20) and the strut reset nut (40).

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