Electric rail clamping device

Abstract

The utility model provides an electric rail clamping device which comprises two clamping plates symmetrically distributed on the two sides of a steel rail. The two-way lead screw is driven by a motor, so that the clamping plates synchronously and reversely move, and the steel rail is clamped or loosened. The two-way lead screw is arranged to replace a traditional connecting rod structure, under the combined action of the self-locking capacity of the two-way lead screw, the structure is more stable, and the steel rails are more stably clamped by the clamping plates; the force application direction of the bidirectional lead screw is the same as the moving direction of the clamping plate, and compared with a traditional driving mechanism, a motor with smaller torque can be selected, so that the cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of rail clamps, in particular to an electric rail clamp. Background Art

[0002] Rail clamps are mainly used in traveling mechanisms such as gantry cranes, bridge cranes, and mobile trolleys to clamp rails and provide safety protection.

[0003] Chinese patent CN105417366A discloses a rail clamp, including a clamp arm driven by a hydraulic cylinder, which clamps or releases the rail under the action of the crossbeam hinge. Chinese patent CN111559701A also discloses a rail clamp and an automatic force-enhancing rail clamp system, including a clamping part I and a clamping part II, which are driven by a driving device under the action of an articulated lever and a clamp wall.

[0004] In the above two devices, the components for clamping and fixing the rails are both realized under the action of the hinged connecting rod, which is not only structurally unstable, but also the force direction is inconsistent with the direction of clamping the rails, forming an angle, so that the force for clamping the rails is only a component force, which will cause instability of the clamped rails. Furthermore, in order to make the component force meet the clamping requirements, it is necessary to increase the driving force of the driving mechanism, thereby increasing the cost of the driving mechanism and causing waste of resources.

[0005] Therefore, how to overcome the above-mentioned defects has become a problem to be solved urgently by those skilled in the art. Utility Model Content

[0006] In order to solve the technical problems in the background technology, the utility model discloses an electric rail clamp.

[0007] The utility model provides an electric rail clamp, comprising:

[0008] Two clamping plates, with internal threads, symmetrically distributed on both sides of the rail;

[0009] Bidirectional screw rod, connected with the clamping plate by thread;

[0010] The motor has a worm gear reducer connected to its driving end, and the driving end of the worm gear reducer is fixedly connected to one end of the bidirectional lead screw;

[0011] Driven by a motor, the clamping plates move synchronously in opposite directions to clamp or release the rails.

[0012] The setting of the bidirectional screw rod replaces the traditional connecting rod structure, and with its own self-locking ability, the structure is more stable and the clamping plate is more stable on the rail; the force direction of the bidirectional screw rod is consistent with the moving direction of the clamping plate. Compared with the traditional drive mechanism, a motor with smaller torque can be selected, thereby reducing costs.

[0013] The splint is generally fixed to the screw nut by welding or by a connecting block, which has a complex structure and high cost, so further improvements are made to solve this problem. Specifically, the splint is provided with an internal thread, which is connected to the bidirectional screw thread.

[0014] The splints are only connected by a bidirectional screw rod, and the structure is unstable, so further improvements are made to solve this problem. Specifically, a coupling shaft is connected between the splints.

[0015] Due to the gap between the splint and the bidirectional screw rod, and the axial gap between the bidirectional screw rod and the bearing seat at the end, the position of the splint is unstable, and the synchronization during movement is relatively poor. When one splint is off the rail, the other splint is still in contact with the rail, which causes the walking mechanism to not operate normally. Therefore, further improvements are made to solve this problem. Specifically, a spring sleeved on the connecting shaft is connected between the splints. The spring is a compression spring, and its restoring force forms a thrust of the splint outward, so that the position of the splint is more stable and the synchronization of movement is higher.

[0016] Traditionally, only one spring is provided, and its position is unstable. Mutual force is also formed between the splints through the spring, resulting in uneven force on the splints. There is a situation where one splint moves while the other splint does not move. Therefore, further improvements are made to solve this problem. Specifically, a baffle is provided in the middle of the coupling shaft, and two springs are provided, which are distributed on both sides of the baffle.

[0017] There are many kinds of threads on the bidirectional screw rod. Based on this, a further design is that the threads on the bidirectional screw rod are trapezoidal threads. With such a setting, the self-locking ability of the bidirectional screw rod is stronger.

[0018] The distance between the coupling shaft and the bidirectional screw rod varies. Based on this, a further design is that the coupling shaft is arranged at the end of the splint, away from the position of the bidirectional screw rod. This increases the distance between the coupling shaft and the bidirectional screw rod, so that the torque of the spring acting on the splint is greater and the position of the splint is more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0020] Figure 1 It is a structural schematic diagram of the utility model;

[0021] Figure 2 It is a front sectional view of the utility model;

[0022] In the figure: 1. clamping plate; 2. bidirectional screw rod; 3. motor; 4. connecting shaft; 5. spring; 6. baffle; 7. support. DETAILED DESCRIPTION

[0023] Now the utility model is further described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, and therefore only show the components related to the utility model.

[0024] Embodiment 1:

[0025] like Figure 1 and Figure 2 As shown, the utility model is an electric rail clamp, comprising a support 7, the support 7 comprising a top plate, and further comprising a first vertical plate and a second vertical plate vertically connected to the lower end of the top plate and arranged symmetrically.

[0026] The lower ends of the first vertical plate and the second vertical plate are connected with a bidirectional screw rod 2, specifically: a bearing with a seat is provided on the outer side of the first vertical plate, and one end of the bidirectional screw rod 2 passes through the first vertical plate and is connected to the bearing with a seat by interference fit. The other end of the bidirectional screw rod 2 passes through the second vertical plate and is driven by a motor 3. The driving end of the motor 3 is connected to a worm gear reducer, which is fixedly connected to the second vertical plate through a mounting seat, and its driving end is fixedly connected to the other end of the bidirectional screw rod 2, thereby driving the bidirectional screw rod 2 to rotate.

[0027] Two symmetrically arranged clamping plates 1 are installed between the first vertical plate and the second vertical plate, and the lower ends of the clamping plates 1 are provided with symmetrically arranged slots, which are combined into the shape of the rail head. The clamping plates 1 are installed on the bidirectional screw 2 through the screw nut, so as to achieve synchronous reverse movement.

[0028] The setting of the bidirectional screw rod 2 replaces the traditional connecting rod structure, and under the joint effect of its own self-locking ability, the structure is more stable and the clamping plate 1 is also more stable for clamping the rail; the force direction of the bidirectional screw rod 2 is consistent with the moving direction of the clamping plate 1. Compared with the traditional driving mechanism, a motor 3 with smaller torque can be selected, thereby reducing costs.

[0029] Embodiment 2:

[0030] Compared with the first embodiment, the difference is that the clamping plate 1 is generally fixed to the screw nut by welding or by a connecting block, which is complex in structure and high in cost. Based on this, the clamping plate 1 is provided with an internal thread, which is threadedly connected to the bidirectional screw 2. The threads on the two clamping plates 1 have opposite spiral directions.

[0031] Embodiment three:

[0032] Compared with the second embodiment, the difference is that a connecting shaft 4 is further connected between the clamping plates 1. The two ends of the connecting shaft 4 are respectively installed on the first vertical plate and the second vertical plate. The connecting shaft 4 passes through the two clamping plates 1, and an oil-containing bearing is installed in the plug-in hole thereof, so as to realize the sliding connection between the clamping plates 1 and the connecting shaft 4. The setting of the connecting shaft 4 improves the installation stability of the clamping plates 1.

[0033] Embodiment 4:

[0034] Compared with the third embodiment, the difference is that due to the gap between the clamping plate 1 and the bidirectional screw rod 2, and the axial gap between the bidirectional screw rod 2 and the bearing with seat, the position of the clamping plate 1 is unstable, and the synchronization during movement is relatively poor. When one clamping plate 1 is separated from the rail, the other clamping plate 1 is still in contact with the rail, which causes the walking mechanism to fail to operate normally. Therefore, the following settings are made: a spring 5 sleeved on the connecting shaft 4 is also connected between the clamping plates 1. The spring 5 is a compression spring, and its restoring force forms a thrust of the clamping plate 1 to the outside, so that the position of the clamping plate 1 is more stable and the synchronization of movement is higher.

[0035] Embodiment five:

[0036] Compared with the fourth embodiment, the difference is that if the spring 5 is provided with one piece, the position of the spring 5 is unstable, and the clamping plates 1 will also form a mutual force through the spring 5, which will cause the clamping plates 1 to be unevenly stressed, and there is a situation where one clamping plate 1 moves while the other clamping plate 1 does not move. Therefore, an integrally formed baffle 6 is provided in the middle of the connecting shaft 4, and two springs 5 ​​are provided, which are distributed on both sides of the baffle 6. One end of the spring 5 abuts against the baffle 6, and the other end abuts against the clamping plate 1; since the position of the baffle 6 is fixed, the position of the spring 5 is also more stable, and the force applied to the clamping plate 1 is also more stable, so that the clamping plates 1 can move synchronously.

[0037] Embodiment six:

[0038] Compared with the first embodiment, the difference is that: the thread on the bidirectional screw rod 2 is a trapezoidal thread. With such a configuration, the self-locking ability of the bidirectional screw rod 2 is stronger.

[0039] Embodiment seven:

[0040] Compared with the fourth embodiment, the difference is that the bidirectional screw rod 2 is arranged above the card slot, close to the card slot, and the connecting shaft 4 is arranged at the upper end of the clamping plate 1. In this way, the distance between the connecting shaft 4 and the bidirectional screw rod 2 is increased, so that the torque of the spring 5 acting on the clamping plate 1 is larger, and the position of the clamping plate 1 is more stable.

[0041] Embodiment eight:

[0042] Compared with the first embodiment, the difference is that the shaft of the motor 3 passes through the rear part of the motor housing, so when the track clamp needs to be opened in a power outage state, the shaft can be manually rotated to open the track clamp.

[0043] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. An electric rail clamp, characterized in that: include: Two clamping plates (1) are provided with internal threads and are symmetrically distributed on both sides of the rail; A bidirectional screw rod (2) is threadedly connected to the clamping plate (1); A motor (3) having a drive end connected to a worm gear reducer, wherein the drive end of the worm gear reducer is fixedly connected to one end of the bidirectional lead screw (2); Driven by the motor (3), the clamping plate (1) is caused to move synchronously in the opposite direction, thereby clamping or releasing the rail.

2. The electric rail clamp according to claim 1, characterized in that: A connecting shaft (4) is also connected between the clamping plates (1).

3. The electric rail clamp according to claim 2, characterized in that: A spring (5) sleeved on the connecting shaft (4) is also connected between the clamping plates (1).

4. The electric rail clamp according to claim 3, characterized in that: A baffle (6) is provided in the middle of the connecting shaft (4), and two springs (5) are provided and distributed on both sides of the baffle (6).

5. The electric rail clamp according to claim 1, characterized in that: The thread on the bidirectional screw rod (2) is a trapezoidal thread.

6. The electric rail clamp according to claim 4, characterized in that: The connecting shaft (4) is arranged at the end of the clamping plate (1), away from the position of the bidirectional screw rod (2).

Images