Elevator safety tongs with limiting structure

Abstract

The invention belongs to the technical field of elevator safety tongs, and discloses an elevator safety tong with a limiting structure, which comprises a fixed seat, a group of wedge blocks are symmetrically arranged in the fixed seat, and tong body assemblies are movably connected in the wedge blocks. Through cooperation of structures such as a clamp body assembly, a moving assembly, a cylinder and a first clamping plate, the overall clamping force and the limiting effect of the device are improved, then the elevator running safety is improved, two safety clamp bodies move in the opposite directions, then the safety clamp bodies drive a second clamping plate to abut against a guide rail, and the safety of the elevator is improved. A protruding rod on the outer wall of a cylinder is movably clamped into a guide groove, so that when a rotating cylinder rotates, the protruding rod drives the cylinder and a first clamping plate to move in the direction of a guide rail along the track of the guide groove, then the first clamping plate and two second clamping plates apply clamping force to the guide rail at the same time, and the overall limiting effect of the device is improved; and therefore, the running safety of the elevator is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of elevator safety clamps, in particular to an elevator safety clamp with a limiting structure. Background Art

[0002] The elevator safety clamp is an elevator safety device used to prevent the elevator from falling freely in the event of an accident (such as cable breakage, elevator failure, etc.), thereby protecting the safety of passengers and equipment. The elevator safety clamp is one of the key components of the elevator safety system, and its design and performance must comply with relevant safety standards and regulations.

[0003] When the existing elevator safety clamp is in use, it is generally clamped on the guide rail by the wedge block structure on both sides or one side of the device, so as to realize the elevator braking function. However, since the braking effect mainly depends on the friction between the wedge block and the guide rail, and the contact area between the wedge block structure and the guide rail is small when the existing safety clamp is in use, resulting in weak clamping and limiting effects. In addition, when the existing device is in use, it can only clamp one side or both sides of the guide rail, resulting in a single positioning point, which in turn affects the braking effect of the elevator and reduces the safety of the elevator operation. Therefore, an elevator safety clamp with a limiting structure is proposed to solve the problems raised in the background technology. Summary of the invention

[0004] In order to solve the problems raised in the above background technology, the present invention provides an elevator safety clamp with a limiting structure, which has the advantage of improving the clamping force and limiting effect of the entire device, thereby improving the safety of elevator operation.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an elevator safety clamp with a limiting structure, an elevator safety clamp with a limiting structure, comprising a fixed seat, a group of wedges are symmetrically arranged inside the fixed seat, a clamp body assembly is movably connected inside the wedges, a moving assembly and a cylinder are movably connected inside the fixed seat, a first clamping plate is fixedly connected to one end of the cylinder away from the moving assembly, a second clamping plate is clamped on one side of the clamp body assembly, and a clamping assembly is arranged inside the clamp body assembly;

[0006] Wherein, the clamp body assembly comprises a safety clamp body, one side of the safety clamp body is fixedly connected to two first round rods, and the top of the safety clamp body is fixedly connected to a second round rod;

[0007] The moving assembly comprises a rotating drum, a guide groove is provided in a circular shape at 180 degrees on the surface of the rotating drum, a tooth plate is movably connected inside the fixing seat, and a connecting rod is fixedly connected to the top of the tooth plate.

[0008] Preferably, the clamping assembly comprises an inclined block, one end of which is fixedly connected to a first elastic sheet fixedly connected to the safety clamp body, and the first elastic sheet is used to squeeze the inclined block and keep the inclined block moving toward the second clamping plate.

[0009] Preferably, a third round rod is fixedly connected to one side of the inclined block, the third round rod penetrates the outer wall of the safety clamp body and extends to the outside of the safety clamp body, and a second elastic sheet is fixedly connected to the top of the inner cavity of the safety clamp body.

[0010] Preferably, the bottom of the inclined block is inclined, the surfaces of the second clamping plate and the first clamping plate are provided with corrugated grooves, and the upper and lower ends of the second clamping plate are respectively in contact with the second elastic sheet and the inclined block in the initial state.

[0011] Preferably, a clamping block is provided on the opposite side of the two second clamping plates, a clamping groove matching with the clamping block is provided on the inner wall of the safety clamp body, and the inclined block seals the bottom of the safety clamp body in the initial state.

[0012] Preferably, the surface of the fixing seat is provided with two groups of two slide grooves facing opposite directions, the first round rod is movably clamped inside the slide groove, and when the safety clamp body moves upward, it drives the first round rod to slide along the track of the slide groove.

[0013] Preferably, a limiting block is fixedly connected to the middle of the second round rod, a limiting groove is provided on the surface of the connecting rod, and a round block movable in the limiting groove is provided at one end of the limiting block away from the second round rod.

[0014] Preferably, a gear is fixedly connected to one end of the rotating drum away from the cylinder, and the tooth plate is meshed with the gear. The tooth plate is L-shaped, and the top end of the tooth plate passes through the outer wall of the fixed seat and extends to the outside of the fixed seat.

[0015] Preferably, a protruding rod is provided in a 180-degree circular shape on the outer wall of the cylinder, and the protruding rod is movably clamped in the inside of the guide groove. A straight groove is provided on the inner wall of the fixing seat to cooperate with the protruding rod. When the rotating drum rotates, the straight groove is used to limit the protruding rod circumferentially.

[0016] Preferably, a circular hole is provided on the top of the fixing seat, and the fixing seat is connected to the lifting mechanism through the circular hole. Square grooves are provided on both the upper and lower sides of the fixing seat.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The present invention improves the clamping force and limiting effect of the entire device through the cooperation between structures such as the clamp body assembly, the moving assembly, the cylinder and the first clamping plate, thereby improving the safety of the elevator operation. The two slide grooves are in opposite directions, so that the first round rod drives the two safety clamp bodies to move toward each other along the trajectory of the slide groove, and then the safety clamp body drives the second clamping plate to abut against the guide rail. The convex rod on the outer wall of the cylinder is movably engaged with the inside of the guide groove, so that when the rotating drum rotates, the convex rod drives the cylinder and the first clamping plate to move in the direction of the guide rail along the trajectory of the guide groove, and then the first clamping plate and the two second clamping plates simultaneously apply a clamping force to the guide rail, thereby improving the limiting effect of the entire device, thereby improving the safety of the elevator operation.

[0019] The present invention cooperates between structures such as the safety clamp body, the inclined block, the first spring sheet and the second spring sheet, so that the second clamping plate can be easily and quickly disassembled and replaced, thereby improving the maintenance work efficiency. The third round rod is fixedly connected to the inclined block, so that when the third round rod is pulled, the inclined block is driven to retract into the safety clamp body, so that the inclined block releases the limit on the second clamping plate. The design of the second spring sheet makes it convenient for the second clamping plate to quickly detach from the interior of the safety clamp body under the action of the elastic force of the second spring sheet. The bottom end of the inclined block is in an inclined shape, so that when the second clamping plate is inserted, the inclined block is squeezed and retracted into the safety clamp body, thereby improving the replacement efficiency of the second clamping plate, thereby improving the efficiency of elevator maintenance work. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the side section structure of the present invention;

[0022] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0023] Figure 4 An exploded view of the mobile component of the present invention;

[0024] Figure 5 It is a schematic diagram of the front cross-section structure of the present invention;

[0025] Figure 6 for Figure 5 Enlarged view of point B in the middle;

[0026] Figure 7 It is an exploded view of the caliper body assembly of the present invention.

[0027] In the figure: 1, fixed seat; 2, wedge block; 3, clamp body assembly; 31, safety clamp body; 32, first round rod; 33, second round rod; 34, limit block; 4, moving assembly; 41, rotating cylinder; 42, guide groove; 43, gear; 44, tooth plate; 45, connecting rod; 5, cylinder; 6, first clamping plate; 7, slide groove; 8, second clamping plate; 9, clamping assembly; 91, inclined block; 92, first spring piece; 93, third round rod; 94, second spring piece; 10, round hole. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] like Figures 1 to 7 As shown, the present invention provides an elevator safety clamp with a limiting structure, comprising a fixed seat 1, a group of wedges 2 are symmetrically arranged inside the fixed seat 1, a clamp body assembly 3 is movably connected inside the wedge 2, a moving assembly 4 and a cylinder 5 are movably connected inside the fixed seat 1, a first clamping plate 6 is fixedly connected to one end of the cylinder 5 away from the moving assembly 4, a second clamping plate 8 is clamped on one side of the clamp body assembly 3, and a clamping assembly 9 is arranged inside the clamp body assembly 3;

[0030] The clamp body assembly 3 includes a safety clamp body 31, one side of the safety clamp body 31 is fixedly connected to two first round rods 32, and the top of the safety clamp body 31 is fixedly connected to a second round rod 33;

[0031] The moving assembly 4 comprises a rotating drum 41 , a guide groove 42 is provided on the surface of the rotating drum 41 in an annular manner with an angle of 180 degrees, a tooth plate 44 is movably connected inside the fixed seat 1 , and a connecting rod 45 is fixedly connected to the top of the tooth plate 44 .

[0032] The above scheme is adopted: when the elevator fails, the second round rod 33 drives the safety clamp body 31 to move upward through the lifting mechanism, and at the same time drives the first round rod 32 to slide along the track of the slide groove 7, so that the two safety clamp bodies 31 move toward each other, and then the safety clamp body 31 drives the second clamping plate 8 to abut against the outer wall of the guide rail, and generates friction resistance to limit the car. When the rotating drum 41 rotates, the drum 5 cooperates with the guide groove 42 to drive the first clamping plate 6 to move in the direction of the guide rail, and then the first clamping plate 6 and the second clamping plate 8 abut against the guide rail at the same time, and apply clamping force to the guide rail, thereby improving the overall limiting effect of the device, thereby stopping the car and improving the overall safety of the elevator operation.

[0033] like Figures 5 to 7 As shown, the clamping assembly 9 includes an inclined block 91, one end of which is fixedly connected to a first spring piece 92 fixedly connected to the safety clamp body 31, the first spring piece 92 is used to squeeze the inclined block 91 and keep the inclined block 91 moving toward the second clamping plate 8, one side of the inclined block 91 is fixedly connected to a third round rod 93, the third round rod 93 passes through the outer wall of the safety clamp body 31 and extends to the outside of the safety clamp body 31, and the top of the inner cavity of the safety clamp body 31 is fixedly connected to a second spring piece 94.

[0034] The above scheme is adopted: the third round rod 93 is fixedly connected with the inclined block 91, so that when the third round rod 93 is pulled, the inclined block 91 is driven to retract into the safety clamp body 31, and then the inclined block 91 releases the limit on the second clamping plate 8. Through the design of the second spring piece 94, the second clamping plate 8 can be quickly separated from the interior of the safety clamp body 31 under the action of the elastic force of the second spring piece 94. The bottom end of the inclined block 91 is inclined, so that the second clamping plate 8 is squeezed and retracted into the safety clamp body 31 when inserted, thereby improving the replacement efficiency of the second clamping plate 8, thereby improving the efficiency of elevator maintenance work.

[0035] like Figures 5 to 7 As shown, the bottom of the inclined block 91 is inclined, and the surfaces of the second clamping plate 8 and the first clamping plate 6 are provided with corrugated grooves. The upper and lower ends of the second clamping plate 8 are respectively abutted against the second spring piece 94 and the inclined block 91 in the initial state, and the opposite sides of the two second clamping plates 8 are provided with clamping blocks. The inner wall of the safety clamp body 31 is provided with a clamping groove matching the clamping block. The inclined block 91 seals the bottom of the safety clamp body 31 in the initial state.

[0036] The above scheme is adopted: corrugated grooves are opened on the surfaces of the second clamping plate 8 and the first clamping plate 6. The function of the corrugated grooves is to increase the actual contact area between the second clamping plate 8 and the first clamping plate 6 and the guide rail. When the second clamping plate 8 and the first clamping plate 6 contact the guide rail and apply pressure, more tiny surface areas are involved in the friction process. Under the condition of unchanged positive pressure, the increase in contact area helps to increase friction, thereby effectively enhancing the clamping force and limiting effect.

[0037] like Figures 1 to 5As shown, the surface of the fixed seat 1 is provided with two groups of two slide grooves 7 facing opposite directions, the first round rod 32 is movably clamped in the inside of the slide groove 7, and the first round rod 32 is driven to slide along the track of the slide groove 7 when the safety clamp body 31 moves upward, and the middle part of the second round rod 33 is fixedly connected to the limiting block 34, and the surface of the connecting rod 45 is provided with a limiting groove, and the end of the limiting block 34 away from the second round rod 33 is provided with a round block movable in the limiting groove, and the end of the rotating cylinder 41 away from the cylinder 5 is fixedly connected with the gear 43, and the tooth plate 44 is meshed with the gear 43, and the tooth plate 44 is L-shaped, and the top of the tooth plate 44 passes through the outer wall of the fixed seat 1 and extends to the outside of the fixed seat 1.

[0038] The above scheme is adopted: a limiting groove is opened on the surface of the connecting rod 45, and its function is that when the second round rod 33 drives the limiting block 34 to move upward, the round block on the limiting block 34 will be movably connected to the inside of the limiting groove of the connecting rod 45, thereby driving the tooth plate 44 to move upward together through the connecting rod 45. At the same time, when the two limiting blocks 34 move toward each other, the round block can also slide inside the limiting groove of the connecting rod 45, thereby ensuring the normal operation of the device.

[0039] like Figures 1 to 5 As shown, the outer wall of the cylinder 5 is provided with a convex rod in an annular shape of 180 degrees, and the convex rod is movably clamped in the inside of the guide groove 42. The inner wall of the fixed seat 1 is provided with a straight groove opening that cooperates with the convex rod. When the rotating drum 41 rotates, the straight groove opening is used to circumferentially limit the convex rod. A circular hole 10 is provided on the top of the fixed seat 1, and the fixed seat 1 is connected to the lifting mechanism through the circular hole 10. Square grooves are provided on the upper and lower sides of the fixed seat 1.

[0040] The above scheme is adopted: a circular hole is opened through the top of the fixed seat 1, and its function is that the shape of the circular hole matches the shape of the connecting parts of the lifting mechanism, such as the lifting arm, the connecting rod shaft, etc., so as to ensure that the lifting mechanism can be stably and accurately connected to the fixed seat 1. At the same time, the circular hole, as the connection point between the lifting mechanism and the fixed seat 1, can also effectively transmit the force generated by the lifting mechanism. Square grooves are opened on the upper and lower sides of the fixed seat 1, so that the guide rail can pass through the fixed seat 1 smoothly without any hindrance.

[0041] The working principle and use process of the present invention are as follows: first, the operator connects the fixing seat 1 and the top of the second round rod 33 to the lifting mechanism through the round hole 10. When the elevator fails, the wire rope drives the second round rod 33 to move upward through the lifting mechanism. At this time, the second round rod 33 drives the safety clamp body 31 fixedly connected at its bottom end to move upward. When the safety clamp body 31 moves upward, it drives the first round rod 32 to slide along the track of the slide groove 7, so that the two safety clamp bodies 31 move toward each other during the upward movement, until the safety clamp body 31 drives the second clamping plate 8 to abut against the outer wall of the guide rail, and friction and resistance are generated, thereby limiting the falling car;

[0042] When the second round rod 33 moves upward, it drives the limit block 34 to move in the same direction, and one end of the limit block 34 is movably engaged in the limit groove of the connecting rod 45, so that the limit block 34 drives the connecting rod 45 and the toothed plate 44 to move upward, and then the toothed plate 44 is meshed with the gear 43, so that the gear 43 drives the rotating drum 41 to rotate. When the rotating drum 41 rotates, the convex rod on the outer wall of the cylinder 5 slides along the trajectory of the guide groove 42. Subsequently, the convex rod is limited by the straight groove on the inner wall of the fixed seat 1, and drives the cylinder 5 and the first clamping plate 6 fixedly connected to one end thereof to move in the direction of the guide rail. When the first round rod 32 slides to the top of the slide groove 7, the surface of the first clamping plate 6 abuts against the outer wall of the guide rail, thereby further limiting the position of the device as a whole, and then the clamping force applied to the guide rail by the first clamping plate 6 and the two second clamping plates 8 enables the device as a whole to stop the car on the guide rail in an emergency to prevent it from continuing to slide down.

[0043] When the second clamping plate 8 is excessively worn and needs to be replaced, the operator pulls the third round rod 93 in the direction away from the second clamping plate 8, thereby driving the inclined block 91 to move in the same direction, and then the inclined block 91 is completely retracted into the interior of the safety clamp body 31, thereby releasing the limit on the bottom end of the second clamping plate 8 block. Subsequently, the second clamping plate 8 moves downward under the elastic force of the second spring piece 94, thereby facilitating the removal of the second clamping plate 8 from the interior of the safety clamp body 31. Subsequently, the operator inserts the replaced second clamping plate 8 into the interior of the safety clamp body 31, so that the top end of the second clamping plate 8 abuts against the inclined surface of the inclined block 91, squeezing the inclined block 91 to move in the direction of the third round rod 93. When the second clamping plate 8 is fully inserted into the interior of the safety clamp body 31, the inclined block 91 is reset under the elastic force of the third round rod 93, thereby re-limiting the second clamping plate 8, so that the second clamping plate 8 is fixed on the safety clamp body 31, thereby facilitating the quick disassembly and replacement of the second clamping plate 8.

[0044] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0045] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An elevator safety clamp with a limiting structure, comprising a fixing seat (1), characterized in that: A group of wedge blocks (2) are symmetrically arranged inside the fixed seat (1), a caliper assembly (3) is movably connected inside the wedge blocks (2), a moving assembly (4) and a cylinder (5) are movably connected inside the fixed seat (1), a first clamping plate (6) is fixedly connected to one end of the cylinder (5) away from the moving assembly (4), a second clamping plate (8) is clamped on one side of the caliper assembly (3), and a clamping assembly (9) is arranged inside the caliper assembly (3); The clamp body assembly (3) comprises a safety clamp body (31), one side of the safety clamp body (31) is fixedly connected to two first round rods (32), and the top of the safety clamp body (31) is fixedly connected to a second round rod (33); The moving assembly (4) comprises a rotating drum (41), the surface of which is provided with a guide groove (42) in an annular shape with an angle of 180 degrees, the interior of the fixed seat (1) is movably connected with a tooth plate (44), and the top of the tooth plate (44) is fixedly connected with a connecting rod (45).

2. The elevator safety clamp with a limiting structure according to claim 1, characterized in that: The clamping assembly (9) comprises an inclined block (91), one end of which is fixedly connected to a first elastic sheet (92) fixedly connected to a safety clamp body (31), the first elastic sheet (92) being used to squeeze the inclined block (91) and to keep the inclined block (91) moving toward the second clamping plate (8).

3. The elevator safety clamp with a limiting structure according to claim 2, characterized in that: A third round rod (93) is fixedly connected to one side of the inclined block (91); the third round rod (93) penetrates the outer wall of the safety clamp body (31) and extends to the outside of the safety clamp body (31); and a second elastic sheet (94) is fixedly connected to the top of the inner cavity of the safety clamp body (31).

4. The elevator safety clamp with a limiting structure according to claim 2, characterized in that: The bottom of the inclined block (91) is in the shape of an inclined surface, and the surfaces of the second clamping plate (8) and the first clamping plate (6) are both provided with corrugated grooves. In the initial state, the upper and lower ends of the second clamping plate (8) are respectively in contact with the second spring sheet (94) and the inclined block (91).

5. The elevator safety clamp with a limiting structure according to claim 2, characterized in that: A clamping block is provided on the opposite side of the two second clamping plates (8), and a clamping groove matching the clamping block is provided on the inner wall of the safety clamp body (31). The inclined block (91) seals the bottom of the safety clamp body (31) in the initial state.

6. The elevator safety clamp with a limiting structure according to claim 1, characterized in that: The surface of the fixing seat (1) is provided with two groups of two slide grooves (7) facing opposite directions, the first round rod (32) is movably clamped inside the slide groove (7), and when the safety clamp body (31) moves upward, it drives the first round rod (32) to slide along the track of the slide groove (7).

7. The elevator safety clamp with a limiting structure according to claim 1, characterized in that: The middle part of the second round rod (33) is fixedly connected to a limiting block (34), a limiting groove is provided on the surface of the connecting rod (45), and a round block movable in the limiting groove is provided at one end of the limiting block (34) away from the second round rod (33).

8. The elevator safety clamp with a limiting structure according to claim 1, characterized in that: The end of the rotating drum (41) away from the cylinder (5) is fixedly connected to a gear (43), and the tooth plate (44) is meshedly connected to the gear (43). The tooth plate (44) is L-shaped, and the top end of the tooth plate (44) penetrates the outer wall of the fixed seat (1) and extends to the outside of the fixed seat (1).

9. The elevator safety clamp with a limiting structure according to claim 1, characterized in that: The outer wall of the cylinder (5) is provided with a protruding rod in an annular shape of 180 degrees, and the protruding rod is movably engaged in the interior of the guide groove (42). The inner wall of the fixing seat (1) is provided with a straight slot that matches the protruding rod. When the rotating cylinder (41) rotates, the straight slot is used to limit the protruding rod in a circumferential direction.

10. The elevator safety clamp with a limiting structure according to claim 1, characterized in that: A circular hole (10) is provided on the top of the fixing seat (1), and the fixing seat (1) is connected to the lifting mechanism via the circular hole (10). Square grooves are provided on both the upper and lower sides of the fixing seat (1).

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