CN114955854A

CN114955854A - Rail clamping device of rail-moving type lifting working platform

Info

Publication number: CN114955854A
Application number: CN202210687694.5A
Authority: CN
Inventors: 陈硕; 陈建平
Original assignee: Hangzhou Sivge Machinery Co ltd
Current assignee: Hangzhou Sivge Machinery Co ltd
Priority date: 2022-06-17
Filing date: 2022-06-17
Publication date: 2022-08-30

Abstract

The invention discloses a rail clamping device of a rail moving type lifting working platform, which belongs to the lifting working platform technology, wherein the conventional rail clamping device is used for limiting equipment on a rail to move accidentally under special conditions such as strong wind and the like, and is not suitable for the rail clamping stability when the lifting working platform moves. When the first rail clamping wheel and the second rail clamping wheel are close to each other to clamp the rail, the rail clamping wheels can roll along the rail, so that the rail clamping of the lifting working platform is stable when the lifting working platform moves.

Description

Rail clamping device of rail-moving type lifting working platform

Technical Field

The invention belongs to the technology of lifting operation platforms, and particularly relates to a rail clamping device of a rail-movable type lifting work platform.

Background

The rail-moving type lifting working platform has a chassis moving on a rail, and the width of the rail is generally determined, particularly the rail of a railway, and the distance between the rails is uniform according to the standard of a country or a region. When the lifting working platform works, due to the influence of factors such as amplitude variation (the amplitude depends on the working range), wind power, manual operating force and the like in the working state, the anti-overturning lines formed by the track wheels in the front and back directions and the left and right directions on the track are not enough to ensure the stability of the whole machine.

The common rail clamping device is used for limiting equipment on a rail to accidentally move under special conditions such as strong wind and the like, and is basically different from the rail clamping stability required by a lifting working platform during moving. Therefore, it is necessary to design a device capable of clamping the rail in real time when the lifting work platform moves.

Disclosure of Invention

The invention aims to solve the technical problems and provide a rail clamping device of a rail moving type lifting working platform, which aims to overcome the defects that the conventional rail clamping device is used for limiting the accidental movement of equipment on a rail under special conditions such as strong wind and the like, and is not suitable for the defect that the rail needs to be clamped stably when the lifting working platform moves.

In order to achieve the above object, the rail clamping device of the rail-moving type lifting working platform of the present invention is characterized by comprising:

a support;

the power machine is fixed on the support and comprises a vertical threaded rod which can be driven to rotate;

a clamping assembly which is restrained on the support in a lifting way; the clamping device comprises a nut, a first clamping part and a second clamping part which are symmetrical; the first clamping part comprises a first clamping component, a first joint connecting rod and a first rail clamping wheel, and the first rail clamping wheel is assembled at the lower end of the first clamping component; the second clamping part comprises a second clamping component, a second joint connecting rod and a second rail clamping wheel, and the second rail clamping wheel is assembled at the lower end of the second clamping component; the first clamping part and the second clamping part are symmetrically arranged on two sides of the nut, a connecting rod is connected between the middle part of the first clamping component and the middle part of the second clamping component, the upper end of the first clamping component is connected with the front side of the nut through the first joint connecting rod, and the upper end of the second clamping component is connected with the rear side of the nut through the second joint connecting rod;

the threaded rod is matched with the nut through transmission threads so that the power machine drives the nut to lift through the threaded rod, the lifting of the nut is converted into the lifting of the clamping component through the clamping component, and the first rail clamping wheel and the second rail clamping wheel are close to or separate from each other.

The rail clamping device clamps a rail by the mutual approach of a first rail clamping wheel and a second rail clamping wheel, and separates the first rail clamping wheel and the second rail clamping wheel from each other to separate the first rail clamping wheel and the second rail clamping wheel from each other. When the first rail clamping wheel and the second rail clamping wheel are close to each other to clamp the rail, the rail clamping wheels can roll along the rail, so that the rail clamping of the lifting working platform is stable when the lifting working platform moves.

In order to avoid shaking, the support is provided with a left wall and a right wall which are symmetrical, the left ends of the first clamping member and the second clamping member are in sliding fit with the left wall, and the right ends of the first clamping member and the second clamping member are in sliding fit with the right wall.

In order to guide the first clamping part and the second clamping part to act during lifting, the inner surface of the left wall is provided with a left guide plate, the inner surface of the right wall is provided with a right guide plate, the left guide plate is provided with a left front guide edge and a left rear guide edge which protrude out of the inner surface of the left wall, the right guide plate is provided with a right front guide edge and a right rear guide edge which protrude out of the inner surface of the right wall, a tension spring is connected between the upper ends of the first clamping member and the second clamping member, the upper end of the first clamping member is enabled to be contacted with the left front guide edge and the right front guide edge through the elastic force of the tension spring, and the upper end of the second clamping member is enabled to be contacted with the left rear guide edge and the right rear guide edge through the elastic force of the tension spring. The first rail clamping wheel and the second rail clamping wheel are close to or separate from each other under the guidance of the left guide plate and the right guide plate.

In particular, the distance between the upper left front guide edge end and the upper left rear guide edge end is greater than the distance between the lower left front guide edge end and the lower left rear guide edge end, and the distance between the upper right front guide edge end and the upper right rear guide edge end is greater than the distance between the lower right front guide edge end and the lower right rear guide edge end. By the structure, the first rail clamping wheel and the second rail clamping wheel are separated and descend to be close to the rail, so that the first rail clamping wheel and the second rail clamping wheel are respectively positioned at the front side and the rear side of the rail, and position assurance is provided for subsequent clamping.

In order to increase the smoothness of the fitting, the upper end of the first clamp member is in rounded contact with the left and right front guide edges, and the upper end of the second clamp member is in rounded contact with the left and right rear guide edges.

In order to increase the structural strength, the first clamping member comprises a first left side plate and a first right side plate which are connected together through a first rib plate, and the second clamping member comprises a second left side plate and a second right side plate which are connected together through a second rib plate; the first and second left side panels abut against an inner surface of the left wall and the first and second right side panels abut against an inner surface of the right wall.

In order to constrain the first and second clamp portions in place to effect clamping of the track, a front bar is connected between the front edges of the left and right walls, a rear bar is connected between the rear edges of the left and right walls, and the first and second clamp members are constrained between the front and rear bars.

In order to increase the stability along the track direction, the first rail clamping wheels comprise at least two and are arranged along the left-right direction; the second rail clamping wheels comprise at least two and are arranged along the left-right direction.

In order to realize that the first clamping part and the second clamping part automatically clamp the track when descending, the connecting rod is provided with a contact rail sheet extending downwards; in order to avoid friction generated when the contact rail sheet contacts the rail when the rail is clamped, the first rail clamping wheel and the second rail clamping wheel are close to each other to clamp the rail, and a gap is kept between the contact rail sheet and the upper surface of the rail.

In order to prevent the interference to communication and signals, the rail contact sheet, the first rail clamping wheel and the second rail clamping wheel are insulators.

In order to ensure safety, the first clamping member and the second clamping member are respectively provided with a hook, and when the first rail clamping wheel and the second rail clamping wheel are close to each other to clamp the rail, the hooks hook the rail and keep a gap with the rail. When the rail clamping wheel is failed accidentally, the hook can play a certain rail clamping role.

In order to realize safe linkage, a safety interlocking device is configured, and when the first rail clamping wheel and the second rail clamping wheel are close to each other to clamp the rail, the safety interlocking device sends a clamping confirmation signal to a main control system of the lifting working platform. Therefore, the power machine and a lifting control circuit of the lifting working platform can be set to be in safe interlocking control, when the rail clamping device is in a clamping state, the confirmation signal is sent to a main control system of the lifting working platform, otherwise, the main control system cannot receive the confirmation signal and cannot start the lifting operation of the lifting working platform. Thereby the functional requirement of the rail clamping device for protecting safe operation is realized. When the rail clamping device is in a rail clamping state, the lifting and amplitude-changing operation of the equipment can be carried out, so that the safety of the rail moving type lifting working platform in the high-altitude operation process is ensured.

The nut is driven by the power machine to lift by the threaded rod through the threaded rod, the lifting of the nut is converted into the lifting of the clamping component through the clamping component, and the first rail clamping wheel and the second rail clamping wheel are close to or separate from each other. When the first rail clamping wheel and the second rail clamping wheel are close to each other to clamp the rail, the rail clamping wheels can roll along the rail, so that the rail clamping of the lifting working platform is stable when the lifting working platform moves.

Drawings

FIG. 1 is an isometric view of a rail clamp for a rail-mobile lifting platform of the present invention;

FIG. 2 is a schematic orthographic view of the rail clamp of FIG. 1 from a front-to-back perspective;

FIG. 3 is a sectional view taken along line A-A in FIG. 2;

FIG. 4 is a sectional view taken along line B-B of FIG. 2;

FIG. 5 is an exploded view of the rail clamp of FIG. 1;

FIG. 6 is an orthographic view of the pedestal and clamp assembly of FIG. 5 from a forward-to-rearward perspective;

FIG. 7 is a cross-sectional view taken along line C-C of FIG. 6;

FIG. 8 is an exploded view of the clamping assembly of the present invention;

the reference numbers in the figures illustrate:

100, support seat:

the left wall 110, the right wall 120,

130 left guide plate, 131 left front guide edge, 132 left rear guide edge,

140 right guide plate, 141 right front guide edge, 142 right rear guide edge,

150 front stop lever, 160 rear stop lever, 170 top plate, 180 shaft sleeve and 190 ear parts

200 power machines, 210 threaded rods;

300, clamping component:

at 310 the length of the nut,

320 first clamping part, 321 first clamping component, 322 first joint connecting rod, 323 first clamping rail wheel, 324 first rib plate, 325 first left side plate, 326 first right side plate, 327 round corner, 328 hook,

330 second clamping part, 331 second clamping member, 332 second knuckle link, 333 second clamping rail wheel, 334 second rib plate, 335 second left side plate, 336 second right side plate, 337 rounded corner, 338 hook,

340, 341 contact rail pieces,

350 tension springs;

400 tracks.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The terms "comprises" and "comprising," and any variations thereof, in the description and claims of this invention are intended to cover a non-exclusive inclusion, such that a method or article of manufacture that comprises a list of features does not have to be limited to those features expressly listed, but may include other features not expressly listed that may be included in the method or article of manufacture.

In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", and the like indicate orientations or positional relationships that are identified based on fig. 1, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the technical features defined by the terms "first", "second", etc. have sequential concepts, only in order to clearly describe the defined technical features, so that the defined technical features can be clearly distinguished from other technical features, and do not represent such naming in actual practice, and thus, should not be construed as limiting the present invention.

The present invention will be described in detail with reference to the following embodiments and accompanying drawings.

As shown in fig. 1-5, the rail clamp for a rail-moving elevated work platform includes a support 100, a power machine 200, and a clamping assembly 300.

As shown in fig. 6-7, the support 100 has symmetrical left and

right walls

110 and 120, and the tops of the left and

right walls

110 and 120 are fastened together by a top plate 170, which is preferably welded and may be bent from a steel plate. In order to increase the strength, a front reinforcing plate is welded to the upper portions of the front side edges of the left and right walls, a rear reinforcing plate is welded to the upper portions of the rear side edges of the left and right walls, and ear portions 190 for mounting the bracket on the chassis of the elevating work platform are respectively extended to the left and right sides of the rear reinforcing plate. In specific implementation, the ear part can be arranged at other positions of the support base or replaced by other connecting and mounting structures according to the position and the direction of the support base mounted on the chassis and the structure of the chassis. In order to increase the strength, the outer surfaces of the left wall and the right wall are both welded with vertical reinforcing ribs. In order to support the threaded rod, a shaft sleeve 180 is welded to the lower side of the middle portion of the top wall.

A left guide plate 130 is fixedly provided to an inner surface of the left wall 110, a right guide plate 140 is fixedly provided to an inner surface of the right wall 120, the left guide plate 130 has a left front guide edge 131 and a left rear guide edge 132 protruding from the inner surface of the left wall, and the right guide plate 140 has a right front guide edge 141 and a right rear guide edge 142 protruding from the inner surface of the right wall. The left guide plate 130 is bilaterally symmetrical to the right guide plate 140. Also, the distance between the upper end of the left front guide edge 131 and the upper end of the left rear guide edge 132 is greater than the distance between the lower end of the left front guide edge and the lower end of the left rear guide edge, and the distance between the upper end of the right front guide edge 141 and the upper end of the right rear guide edge 142 is greater than the distance between the lower end of the right front guide edge and the lower end of the right rear guide edge. Moreover, the respective guide edges are smooth. The left guide plate and the right guide plate are used for controlling the motion tracks of the first clamping component and the second clamping component.

A front bar 150 is connected between the front edges of the left and

right walls

110, 120 and a rear bar 160 is connected between the rear edges of the left and right walls.

Accordingly, the left and

right walls

110 and 120 of the bracket, the front and

rear bars

150 and 160, the front and rear reinforcing plates, and the top plate 170 define an installation space therebetween.

Power machine 200 is secured to the upper surface of top plate 170 of the stand and includes a vertically threaded rod 210 that is driven to rotate. The power machine is preferably a speed reducing motor, or a motor and a speed reducing mechanism, or a hydraulic motor.

As shown in fig. 8, the clamping assembly 300 includes a nut 310 and symmetrical first and

second clamping portions

320 and 330.

The first clamping portion 320 includes a first clamping member 321, a first joint link 322, and two first clamping rail wheels 323, and the two first clamping rail wheels 323 are arranged and assembled at a lower end of the first clamping member 321 in the left-right direction. The second clamping portion 330 includes a second clamping member 331, a second joint link 332, and two second clamping rail wheels 333, which are fitted in a left-right direction in line at the lower end of the second clamping member. The first clamping portion 320 and the second clamping portion 330 are symmetrically arranged on two sides of the nut 310, two connecting rods 340 are connected between the middle portion of the first clamping member 321 and the middle portion of the second clamping member 331, the upper end of the first clamping member 321 is connected with the front side of the nut 310 through a first joint connecting rod 322, and the upper end of the second clamping member 331 is connected with the rear side of the nut 310 through a second joint connecting rod 332.

Further, first clamp member 321 includes a first left side plate 325 and a first right side plate 326 connected together via a first rib plate 324, and second clamp member 331 includes a second left side plate 335 and a second right side plate 336 connected together via a second rib plate 334.

Hooks

328, 338 are provided on both the first and second clamp members.

The two connecting rods 340 are respectively provided with a contact rail piece 341 extending downwards, and when the first rail clamping wheel 323 and the second rail clamping wheel 333 approach each other to clamp the rail, the contact rail piece 341 keeps a gap with the upper surface of the rail 400.

When the rail clamping device works on the rails of a high-speed railway and the like, the two rails need to be isolated by electric signals to prevent the interference on communication and signals, so that the rail clamping wheel and the rail contact piece can be made of insulating materials such as engineering plastics in the using occasions.

The clamping assembly 300 shown in fig. 8 is placed in the mounting space in the holder from bottom to top. The first left side plate 325 and the second left side plate 335 respectively serve as a left end of the first clamping member and a left end of the second clamping member abuts against the inner surface of the left wall 110, and the first right side plate 326 and the second right side plate 336 respectively serve as a right end of the first clamping member and a right end of the second clamping member abuts against the inner surface of the right wall 120. So that the left ends of the first and second clamping members are in sliding engagement with the left wall and the right ends of the first and second clamping members are in sliding engagement with the right wall. A tension spring 350 is connected between the upper ends of the first and second clamping members, the upper end of the first clamping member 321 is urged to contact the left and right front guide edges 131 and 141 by the elastic force of the tension spring, and the upper end of the second clamping member 331 is urged to contact the left and right rear guide edges 132 and 142 by the elastic force of the tension spring. Also, the upper end of the first clamping member contacts the left and right front guide edges 131 and 141 via a rounded corner 327, and the upper end of the second clamping member contacts the left and right rear guide edges 132 and 142 via a rounded corner 337. The first and second clamping members are constrained between the front and rear bars. Thereby, make the centre gripping subassembly restrict and rise in the support.

The threaded rod 210 passes through the sleeve 180 to be matched with the nut 310 through a transmission thread, and the sleeve is matched with the optical axis section on the threaded rod. The power machine drives the nut to lift through the threaded rod, the lifting of the nut is converted into the lifting of the clamping component through the clamping component, and the first rail clamping wheel and the second rail clamping wheel are close to or separated from each other.

In addition, a safety interlocking device is configured, a travel switch is installed in the travel of the clamping assembly, the travel switch is triggered when the first rail clamping wheel and the second rail clamping wheel are close to each other to clamp the rail, and the safety interlocking device sends a clamping confirmation signal to a main control system of the lifting working platform. The travel switch may be a mechanical switch or a photoelectric switch.

In the rail clamping device having the above-described structure, the power machine 200 lifts and lowers the nut 310 with the screw rod 210, and the lifting and lowering of the nut 310 is converted into the lifting and lowering of the clamping member by the clamping member 300. Before the contact piece 341 contacts the rail 400, the postures of the first and

second clamping members

321 and 331 are controlled by the guide plate and not by the joint link connected to the nut, and the first and

second clamping members

323 and 333 are separated from each other when they are moved downward. In the process of moving the first and second clamping members downward, the first and second rail clamping wheels are separated from each other to approach the rail, and the rail contacting piece 341 first contacts the rail 400. After the rail contact sheet touches the rail, the postures of the first clamping member and the second clamping member and the clamping degree of the rail clamping wheel and the rail are completely controlled by the nut 310 and the joint connecting rod connected to the nut, when the first clamping member and the second clamping member move downwards, the first clamping member 321 and the second clamping member 331 are controlled by the lower force of the nut, the joint connecting rod struts the upper ends of the first clamping member and the second clamping member, the first clamping member and the second clamping member swing, and the lower ends of the first clamping member and the second clamping member are closed, so that the first rail clamping wheel and the second rail clamping wheel are close to the rail until the first rail clamping wheel and the second rail clamping wheel are completely contacted with the rail to realize clamping. Because the outline shapes of the first rail clamping wheel and the second rail clamping wheel are matched with the shape of the rail, and the process that the first rail clamping wheel and the second rail clamping wheel clamp the rail has the process of self-adapting to the adjusting position, when the first rail clamping wheel and the second rail clamping wheel are close to each other to clamp the rail, the contact rail piece and the upper surface of the rail keep a gap, and the contact rail piece does not need to be made into a wheel type.

And when the first rail clamping wheel and the second rail clamping wheel are close to each other to clamp the rail, the hook hooks the rail and keeps a gap with the rail.

The threaded rod and the nut have the axial self-locking performance, so that the clamping capacity of the rail clamping device can be maintained as long as the power machine does not rotate in the operation process.

According to the rail clamping device, the lower ends of the first clamping member and the second clamping member are favorable for reducing the storage size when being closed, and the rail clamping wheels are favorable for approaching the rail when being opened. Wherein, first clamp rail wheel and second clamp rail wheel are two, have increased the security redundancy. The hook is arranged between the two rail clamping wheels on the same side, the gap between the hook and the rail is larger than the gap between the rail clamping wheels and the rail, so that the hook is not in contact with the rail under the normal state, and the hook can play a certain rail clamping role when the rail wheels fail unexpectedly.

Claims

1. Portable lift work platform of track presss from both sides rail ware, characterized by includes:

a support (100);

a power machine (200) fixed to the support and including a vertical threaded rod (210) that can be driven in rotation;

a clamping assembly (300) which is vertically constrained to the support; the clamping device comprises a nut (310), a first clamping part (320) and a second clamping part (330), wherein the first clamping part and the second clamping part are symmetrical; the first clamping part (320) comprises a first clamping member (321), a first joint connecting rod (322) and a first rail clamping wheel (323), and the first rail clamping wheel is assembled at the lower end of the first clamping member; the second clamping portion (330) comprises a second clamping member (331), a second joint connecting rod (332) and a second clamping rail wheel (333), and the second clamping rail wheel is assembled at the lower end of the second clamping member; the first clamping part and the second clamping part are symmetrically arranged on two sides of the nut, a connecting rod (340) is connected between the middle part of the first clamping member and the middle part of the second clamping member, the upper end of the first clamping member (321) is connected with the front side of the nut (310) through the first joint connecting rod (322), and the upper end of the second clamping member (331) is connected with the rear side of the nut (310) through the second joint connecting rod (332);

the threaded rod (210) is matched with the nut (310) through transmission threads so that the power machine drives the nut to lift through the threaded rod, the lifting of the nut is converted into the lifting of the clamping component through the clamping component, and the first rail clamping wheel (323) and the second rail clamping wheel (333) are close to or separated from each other.

2. The rail clamping device of claim 1, wherein the rail clamping device comprises: the support (100) is provided with a left wall (110) and a right wall (120) which are symmetrical, the left ends of the first clamping member and the second clamping member are in sliding fit with the left wall, and the right ends of the first clamping member and the second clamping member are in sliding fit with the right wall.

3. The rail clamping device of claim 2, which is a rail-moving type lifting working platform, and is characterized in that: the inner surface of the left wall is provided with a left guide plate (130), the inner surface of the right wall is provided with a right guide plate (140), the left guide plate is provided with a left front guide edge (131) and a left rear guide edge (132) which protrude out of the inner surface of the left wall, the right guide plate is provided with a right front guide edge (141) and a right rear guide edge (142) which protrude out of the inner surface of the right wall, a tension spring (350) is connected between the upper ends of the first clamping member (321) and the second clamping member (331), the upper end of the first clamping member is contacted on the left front guide edge and the right front guide edge through the elastic force of the tension spring, and the upper end of the second clamping member is contacted on the left rear guide edge and the right rear guide edge through the elastic force of the tension spring.

4. The rail clamp of claim 3, wherein: the distance between the upper end of the left front guide edge and the upper end of the left rear guide edge is greater than the distance between the lower end of the left front guide edge and the lower end of the left rear guide edge, and the distance between the upper end of the right front guide edge and the upper end of the right rear guide edge is greater than the distance between the lower end of the right front guide edge and the lower end of the right rear guide edge.

5. The rail clamp of claim 3, wherein: the upper end of the first clamping member is in rounded contact with the left and right front guide edges, and the upper end of the second clamping member is in rounded contact with the left and right rear guide edges.

6. The rail clamping device of the rail-moving type lifting working platform according to any one of claims 2 to 5, which is characterized in that: the first clamping member (321) comprises a first left side plate (325) and a first right side plate (326) which are connected together through a first rib plate (324), and the second clamping member comprises a second left side plate (335) and a second right side plate (336) which are connected together through a second rib plate (334); the first left side plate (325) and the second left side plate (335) abut against the inner surface of the left wall (110), and the first right side plate (326) and the second right side plate (336) abut against the inner surface of the right wall (120).

7. The rail clamping device of the rail-moving type lifting working platform according to any one of claims 2 to 5, which is characterized in that: a front stop lever (150) is connected between the front edges of the left wall (110) and the right wall (120), a rear stop lever (160) is connected between the rear edges of the left wall and the right wall, and the first clamping member (321) and the second clamping member (331) are constrained between the front stop lever and the rear stop lever.

8. The rail clamping device of the rail-moving type lifting working platform according to any one of claims 1 to 5, which is characterized in that: the first rail clamping wheels (323) comprise at least two and are arranged along the left-right direction; the second rail clamping wheels (333) comprise at least two and are arranged along the left-right direction.

9. The rail clamping device of the rail-moving type lifting working platform according to any one of claims 1 to 5, which is characterized in that: the connecting rod (340) is provided with a rail contacting piece (341) extending downwards, and the first rail clamping wheel and the second rail clamping wheel keep a gap with the upper surface of the rail when being close to each other to clamp the rail.

10. The rail clamping device of the rail-moving type lifting working platform according to any one of claims 1 to 5, which is characterized in that: the first clamping member and the second clamping member are respectively provided with a hook, and the hooks hook the track and keep a gap with the track when the first clamping rail wheel and the second clamping rail wheel are close to each other to clamp the track.