Rail moving type lifting work platform rail clamp

Abstract

The rail mobile lifting work platform rail clamp belongs to the lifting work platform technology, and the existing rail clamp is used for limiting the accidental movement of the equipment on the rail under the special conditions such as strong wind, and is not suitable for the rail clamping and stabilizing of the lifting work platform during movement. The threaded rod and the nut are matched through the transmission thread, the power machine lifts the nut through the threaded rod, the lifting of the nut is converted into the lifting of the clamping assembly and the approach or separation of the first rail clamp wheel and the second rail clamp wheel through the clamping assembly. When the first rail clamp wheel and the second rail clamp wheel approach each other to clamp the rail, the rail clamp wheel can roll along the rail, so that the lifting work platform is clamped and stabilized during movement.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of lifting work platforms, and particularly relates to a track mobile lifting work platform rail clamp. BACKGROUND

[0002] The track mobile lifting work platform moves on the track. Since the width of the track is generally determined, especially the track of the railway, the interval is unified according to the standard of a country or region. However, due to the influence of factors such as amplitude (the size of the amplitude depends on the working range), wind force, manual operation force, etc. during the working of the lifting work platform, the anti-overturning line formed by the track wheels in the front and back and left and right directions on the track is insufficient to ensure the stability of the whole machine.

[0003] The common rail clamp is used to limit the accidental movement of the equipment on the track under special conditions such as strong wind, which is essentially different from the rail clamping stability required by the lifting work platform during movement. Therefore, a device that can clamp the track in real time when the lifting work platform moves is needed. SUMMARY

[0004] The technical problem to be solved and the technical task proposed by the present application are to overcome the defects that the existing rail clamp is used to limit the accidental movement of the equipment on the track under special conditions such as strong wind, and is not suitable for the rail clamping stability required by the lifting work platform during movement. The present application provides a track mobile lifting work platform rail clamp, which can constrain the lifting work platform on the track and move along the track by means of the rail clamp.

[0005] To achieve the above-mentioned purpose, the track mobile lifting work platform rail clamp of the present application comprises:

[0006] a support;

[0007] a power machine fixed to the support, which comprises a vertical threaded rod that can be driven to rotate;

[0008] The clamping assembly is constrained to be lifted and lowered by the support; it includes a nut and a symmetrical first clamping part and a second clamping part; the first clamping part includes a first clamping member, 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 member; the second clamping part includes a second clamping member, 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 member; the first clamping part and the second clamping part are symmetrically separated on both sides of the nut, a connecting rod 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 is connected to the front side of the nut via the first joint connecting rod, and the upper end of the second clamping member is connected to the rear side of the nut via the second joint connecting rod;

[0009] The threaded rod and the nut cooperate with each other through a transmission thread so that the power machine lifts and lowers the nut through the threaded rod. The lifting and lowering of the nut is converted into the lifting and lowering of the clamping assembly through the clamping assembly and the first and second rail clamping wheels move closer to or apart from each other.

[0010] The rail clamping device has a first rail clamping wheel and a second rail clamping wheel that move together to clamp the rail, and the first rail clamping wheel and the second rail clamping wheel move apart to release the clamping of the rail. When the first rail clamping wheel and the second rail clamping wheel move together to clamp the rail, the rail clamping wheel can roll along the rail, ensuring that the lifting work platform is stable when the rail is clamped during movement.

[0011] To avoid shaking, the support has symmetrical left and right walls, the left ends of the first clamping member and the second clamping member are slidably engaged with the left wall, and the right ends of the first clamping member and the second clamping member are slidably engaged with the right wall.

[0012] To guide the first and second clamping parts during lifting and lowering, the inner surface of the left wall has a left guide plate, and the inner surface of the right wall has a right guide plate. The left guide plate has a left front guide edge and a left rear guide edge protruding from the inner surface of the left wall, and the right guide plate has a right front guide edge and a right rear guide edge protruding from the inner surface of the right wall. A tension spring is connected between the upper ends of the first and second clamping members. The elastic force of the tension spring forces the upper end of the first clamping member to contact the left and right front guide edges, and the elastic force of the tension spring forces the upper end of the second clamping member to contact the left and right rear guide edges. The left and right guide plates guide the first and second track-clamping wheels to move closer to or apart from each other.

[0013] In particular, 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. With this structure, the first and second track-clamping wheels are allowed to separate from each other and descend close to the track so that they are respectively located on the front and rear sides of the track, providing a guaranteed position for subsequent clamping.

[0014] In order to increase the smoothness of the fit, the upper end of the first clamping member contacts the left front guide edge and the right front guide edge via rounded corners, and the upper end of the second clamping member contacts the left rear guide edge and the right rear guide edge via rounded corners.

[0015] In order to increase structural strength, the first clamping member includes a first left side plate and a first right side plate connected together by a first rib plate, and the second clamping member includes a second left side plate and a second right side plate connected together by a second rib plate; the first left side plate and the second left side plate are affixed to the inner surface of the left wall, and the first right side plate and the second right side plate are affixed to the inner surface of the right wall.

[0016] In order to constrain the first clamping part and the second clamping part in appropriate positions to realize the clamping track, a front stop bar is connected between the front edges of the left wall and the right wall, and a rear stop bar is connected between the rear edges of the left wall and the right wall, and the first clamping member and the second clamping member are constrained between the front stop bar and the rear stop bar.

[0017] In order to increase the stability along the track direction, the first track-clamping wheels include at least two and are arranged in the left-right direction; the second track-clamping wheels include at least two and are arranged in the left-right direction.

[0018] In order to achieve self-clamping of the track by the first clamping part and the second clamping part when they descend, a downwardly extending track-touching piece is provided on the connecting rod; in order to avoid friction caused by the track-touching piece contacting the track when clamping the track, the first track-clamping wheel and the second track-clamping wheel approach each other to clamp the track and maintain a gap between the track-touching piece and the upper surface of the track.

[0019] In order to prevent interference with communications and signals, the track contact piece, the first track clamping wheel and the second track clamping wheel are all insulators.

[0020] To ensure safety, the first clamping member and the second clamping member are both provided with hooks, which hook the track and maintain a gap with the track when the first clamping wheel and the second clamping wheel move closer to each other to clamp the track. When the clamping wheel fails unexpectedly, the hook can play a certain role in clamping the track.

[0021] In order to realize the safety linkage, a safety interlocking device is configured, and the safety interlocking device sends a clamping confirmation signal to the main control system of the lifting working platform when the first rail clamping wheel and the second rail clamping wheel approach each other to clamp the rail. Accordingly, the power machine can be set in safety interlocking control with the lifting control circuit of the lifting working platform. When the rail clamping device is in the clamping state, the confirmation signal is sent to the 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. Thus, the function requirement of the rail clamping device for protecting the safety operation is realized. When the rail clamping device is in the clamping state, the lifting and amplitude operation of the equipment can be carried out, so as to ensure the safety of the rail moving lifting working platform during the high-altitude operation.

[0022] The threaded rod and the nut are matched by the transmission thread, the power machine lifts the nut through the threaded rod, the lifting of the nut is converted into the lifting of the clamping assembly and the approach or separation of the first rail clamping wheel and the second rail clamping wheel by the clamping assembly. When the first rail clamping wheel and the second rail clamping wheel approach each other to clamp the rail, the rail clamping wheel can roll along the rail, so as to promote the stability of the rail clamping of the lifting working platform during the movement. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is a side view of the rail clamping device of the rail moving lifting working platform of the present application;

[0024] Figure 2 It is a front view of the rail clamping device shown in Figure 1

[0025] Figure 3 It is a sectional view of A-A in Figure 2

[0026] Figure 4 It is a sectional view of B-B in Figure 2

[0027] Figure 5 It is a structure exploded view of the rail clamping device shown in Figure 1

[0028] Figure 6 It is a front view of the support and the clamping assembly shown in Figure 5

[0029] Figure 7 It is a sectional view of C-C in Figure 6

[0030] Figure 8 It is a structure exploded view of the clamping assembly of the present application;

[0031] REFERENCE NUMERALS IN DRAWINGS:

[0032] 100 support:​​​​​​

[0033] 110 left wall, 120 right wall,

[0034] 130 left guide plate, 131 left front guide edge, 132 left rear guide edge,

[0035] 140 right guide plate, 141 right front guide edge, 142 right rear guide edge,

[0036] 150 front bar, 160 rear bar, 170 top plate, 180 bushing, 190 ear

[0037] 200 power machine, 210 threaded rod;

[0038] 300 clamping assembly:

[0039] 310 nut,

[0040] 320 first clamping portion, 321 first clamping member, 322 first joint connecting rod, 323 first track clamping wheel, 324 first rib plate, 325 first left side plate, 326 first right side plate, 327 fillet, 328 hook,

[0041] 330 second clamping portion, 331 second clamping member, 332 second joint connecting rod, 333 second track clamping wheel, 334 second rib plate, 335 second left side plate, 336 second right side plate, 337 fillet, 338 hook,

[0042] 340 connecting rod, 341 track piece,

[0043] 350 tension spring;

[0044] 400 tracks. DETAILED DESCRIPTION

[0045] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of 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 making creative efforts shall fall within the scope of protection of the present invention.

[0046] The terms "including" and "having" and any variations thereof in the description and claims of the present invention are intended to cover non-exclusive inclusions. For example, a method or product that includes a series of technical features is not necessarily limited to those technical features clearly listed, and may also include other technical features that are not clearly listed and can be included in the method or product.

[0047] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right" and the like indicate directions or positional relationships based on the attached drawings. Figure 1 The orientation or positional relationship of the logo is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, it should not be understood as a limitation on the present invention.

[0048] In the description of the present invention, it should be understood that the technical features defined by the terms "first", "second", etc., which have sequential concepts, are only used 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 implementation. Therefore, it cannot be understood as a limitation on the present invention.

[0049] The present invention is described in detail below with reference to specific embodiments and accompanying drawings.

[0050] like Figure 1-5 As shown, the track movable lifting work platform rail clamp includes a support 100, a power machine 200 and a clamping assembly 300.

[0051] like Figure 6-7 As shown, the support 100 has symmetrical left and right walls 110 and 120. The tops of the left and right walls 110 and 120 are fastened together by a top plate 170. The fastening connection is preferably welded, but can also be formed by bending steel plates. To increase strength, a front reinforcing plate is welded to the upper portion of the front edges of the left and right walls, and a rear reinforcing plate is welded to the upper portion of the rear edges of the left and right walls. The rear reinforcing plates also extend to the left and right sides of the rear reinforcing plates to form ears 190, which are used to mount the support on the chassis of the lifting work platform. In specific implementation, depending on the position and direction of the support on the chassis and the structure of the chassis, the ears can be located elsewhere on the support, or they can be replaced with other connecting and mounting structures. To increase strength, vertical reinforcing ribs are welded to the outer surfaces of the left and right walls. To support the threaded rod, a shaft sleeve 180 is welded to the lower side of the middle portion of the top wall.

[0052] A left guide plate 130 is fixedly mounted on the inner surface of the left wall 110, while a right guide plate 140 is fixedly mounted on the 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, while 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 and the right guide plate 140 are bilaterally symmetrical. Furthermore, the distance between the upper ends of the left front guide edge 131 and the upper ends of the left rear guide edge 132 is greater than the distance between the lower ends of the left front guide edge and the lower ends of the left rear guide edge. The distance between the upper ends of the right front guide edge 141 and the upper ends of the right rear guide edge 142 is greater than the distance between the lower ends of the right front guide edge and the lower ends of the right rear guide edge. Furthermore, each guide edge is smooth. The left and right guide plates are used to control the movement trajectory of the first and second clamping members.

[0053] A front barrier bar 150 is connected between the front edges of the left wall 110 and the right wall 120 , and a rear barrier bar 160 is connected between the rear edges of the left wall and the right wall.

[0054] Therefore, a mounting space is defined between the left and right walls 110 and 120 of the support, the front and rear bars 150 and 160 , the front and rear reinforcing plates, and the top plate 170 .

[0055] The power machine 200 is fixed to the upper surface of the top plate 170 of the support, and includes a vertical threaded rod 210 that can be driven to rotate. The power machine is preferably a reduction motor, or a motor with a reduction mechanism, or a hydraulic motor.

[0056] like Figure 8 As shown, the clamping assembly 300 includes a nut 310 and a symmetrical first clamping portion 320 and a second clamping portion 330 .

[0057] The first clamping portion 320 includes a first clamping member 321, a first articulated link 322, and two first rail-clamping wheels 323. The two first rail-clamping wheels 323 are arranged in a left-right direction and assembled at the lower end of the first clamping member 321. The second clamping portion 330 includes a second clamping member 331, a second articulated link 332, and two second rail-clamping wheels 333. The two second rail-clamping wheels are arranged in a left-right direction and assembled at the lower end of the second clamping member. The first clamping portion 320 and the second clamping portion 330 are symmetrically located on either side of the nut 310. Two connecting rods 340 are connected between the middle portions of the first clamping member 321 and the middle portions of the second clamping member 331. The upper end of the first clamping member 321 is connected to the front side of the nut 310 via the first articulated link 322, and the upper end of the second clamping member 331 is connected to the rear side of the nut 310 via the second articulated link 332.

[0058] Furthermore, the first clamping member 321 includes a first left side plate 325 and a first right side plate 326 connected together via a first rib 324, and the second clamping member 331 includes a second left side plate 335 and a second right side plate 336 connected together via a second rib 334. Hooks 328, 338 are provided on the first and second clamping members.

[0059] The two connecting rods 340 are both provided with a track-touching piece 341 extending downward. When the first track-clamping wheel 323 and the second track-clamping wheel 333 move toward each other to clamp the track, a gap is maintained between the track-touching piece 341 and the upper surface of the track 400 .

[0060] When operating on tracks such as high-speed railways, electrical signal isolation is required between the two tracks to prevent interference with communications and signals. Therefore, the track clamps used in such applications can have the track clamping wheels and track contact plates made of insulating materials such as engineering plastics.

[0061] Will Figure 8 The clamping assembly 300 is positioned from bottom to top in the mounting space within the support. The first left side panel 325 and the second left side panel 335, serving as the left end of the first and second holding members, respectively, rest against the inner surface of the left wall 110. The first right side panel 326 and the second right side panel 336, serving as the right end of the first and second holding members, respectively, rest against the inner surface of the right wall 120. This allows the left ends of the first and second clamping members to slide against the left wall, while the right ends of the first and second clamping members to slide against the right wall. A tension spring 350 is connected between the upper ends of the first and second clamping members. The elastic force of the tension spring forces the upper end of the first clamping member 321 to contact the left front guide edge 131 and the right front guide edge 141. The elastic force of the tension spring forces the upper end of the second clamping member 331 to contact the left rear guide edge 132 and the right rear guide edge 142. Furthermore, the upper end of the first clamping member contacts the left front guide edge 131 and the right front guide edge 141 via rounded corners 327, while the upper end of the second clamping member contacts the left rear guide edge 132 and the right rear guide edge 142 via rounded corners 337. The first and second clamping members are constrained between the front and rear bars, thereby constraining the clamping assembly to rise and fall within the support.

[0062] The threaded rod 210 passes through the sleeve 180 and engages with the nut 310 via a transmission thread. The sleeve engages with the smooth shaft section on the threaded rod. The power machine lifts the nut via the threaded rod. The lifting of the nut is converted by the clamping assembly into the lifting of the clamping assembly and the movement of the first and second rail clamping wheels toward or away from each other.

[0063] In addition, a safety interlock device is configured, with a travel switch installed within the travel of the clamping assembly. When the first and second rail-clamping wheels close together and clamp the rail, the travel switch is triggered, and the safety interlock device sends a clamping confirmation signal to the main control system of the lifting work platform. The travel switch can be a mechanical switch or a photoelectric switch.

[0064] The track clamp of the aforementioned structure is raised and lowered by the power machine 200 via the threaded rod 210, carrying the nut 310. The raising and lowering of the nut 310 is converted to the raising and lowering of the clamping assembly by the clamping assembly 300. Before the track contacting plate 341 contacts the track 400, the postures of the first clamping member 321 and the second clamping member 331 are controlled by the guide plate rather than the articulated link connected to the nut. As the first and second clamping members move downward, the first and second track clamping wheels 323 and 333 separate from each other. During the downward movement of the first and second clamping members, the first and second track clamping wheels separate and approach the track, with the track contacting plate 341 first contacting the track 400. When the track contact piece touches the track, the posture of the first clamping member and the second clamping member, and the degree of clamping between the track clamping wheel and the track 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 downward, the first clamping member 321 and the second clamping member 331 are controlled by the downward force of the nut. The joint connecting rod spreads the upper ends of the first clamping member and the second clamping member, and the first clamping member and the second clamping member swing. The lower ends of the first clamping member and the second clamping member move closer, causing the first and second clamping wheels to approach the track until they are completely in contact with the track to achieve clamping. Because the contours of the first and second clamping wheels match the shape of the track, the process of the first and second clamping wheels clamping the track has a process of self-adapting and adjusting the position. Therefore, when the first and second clamping wheels move closer to each other to clamp the track, the track contact piece maintains a gap with the upper surface of the track, and there is no need to make the track contact piece into a wheel shape.

[0065] Moreover, when the first track-clamping wheel and the second track-clamping wheel move closer to each other and clamp the track, the hook hooks the track and maintains a gap with the track.

[0066] Since the threaded rod and nut have axial self-locking properties, the clamping capacity of the rail clamp can be maintained as long as the power machine does not rotate during operation.

[0067] In this track clamp, the lower ends of the first and second clamping members close together to minimize storage size, while their open positions facilitate access to the track. The presence of two first and second clamping wheels enhances safety redundancy. A hook is positioned between the two track clamping wheels on the same side. The gap between the hook and the track is greater than the gap between the clamping wheels and the track to ensure that the hook and track do not contact under normal conditions. In the event of a track wheel failure, the hook can provide a certain degree of track clamping.

Claims

1. Track movable lifting work platform rail clamp, its characteristics are include: Support (100); A power machine (200) is fixed to the support and includes a vertical threaded rod (210) that can be driven to rotate; A clamping assembly (300) which is lifted and lowered and restrained on the support; It comprises a nut (310) and a symmetrical first clamping part (320) and a second clamping part (330); the first clamping part (320) comprises a first clamping member (321), a first joint connecting rod (322), and a first track-clamping wheel (323), and the first track-clamping wheel is assembled at the lower end of the first clamping member; the second clamping part (330) comprises a second clamping member (331), a second joint connecting rod (332), and a second track-clamping wheel (333), and the second track-clamping wheel is assembled at the lower end of the second clamping member; the first clamping part and the second clamping part are symmetrically separated on both 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 to the front side of the nut (310) via the first joint connecting rod (322), and the upper end of the second clamping member (331) is connected to the rear side of the nut (310) via the second joint connecting rod (332); The threaded rod (210) and the nut (310) cooperate with each other through a transmission thread so that the power machine lifts the nut via the threaded rod, and the lifting of the nut is converted into the lifting of the clamping assembly and the first rail clamping wheel (323) and the second rail clamping wheel (333) move closer to or away from each other through the clamping assembly. The support (100) has a symmetrical left wall (110) and a right wall (120), the left ends of the first clamping member and the second clamping member are in sliding engagement with the left wall, and the right ends of the first clamping member and the second clamping member are in sliding engagement with the right wall; The inner surface of the left wall has a left guide plate (130), the inner surface of the right wall has a right guide plate (140), the left guide plate has a left front guide edge (131) and a left rear guide edge (132) protruding from the inner surface of the left wall, the right guide plate has a right front guide edge (141) and a right rear guide edge (142) protruding from 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 elastic force of the tension spring causes the upper end of the first clamping member to contact the left front guide edge and the right front guide edge, and the elastic force of the tension spring causes the upper end of the second clamping member to contact the left rear guide edge and the right rear guide edge; 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; The connecting rod (340) is provided with a track-touching piece (341) extending downwards, and when the first track-clamping wheel and the second track-clamping wheel move closer to each other to clamp the track, a gap is maintained between the track-touching piece and the upper surface of the track.

2. The rail clamp for a track-movable lifting work platform according to claim 1, characterized in that: The upper end of the first clamping member contacts the left front guide edge and the right front guide edge via rounded corners, and the upper end of the second clamping member contacts the left rear guide edge and the right rear guide edge via rounded corners.

3. The rail clamp for a track-moving lifting work platform according to claim 1 or 2, characterized in that: The first clamping 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 the second clamping member includes a second left side plate (335) and a second right side plate (336) connected together via a second rib plate (334); the first left side plate (325) and the second left side plate (335) are abutted against the inner surface of the left wall (110), and the first right side plate (326) and the second right side plate (336) are abutted against the inner surface of the right wall (120).

4. The rail clamp for a track-movable lifting work platform according to claim 1 or 2, characterized in that: A front stopper (150) is connected between the front edges of the left wall (110) and the right wall (120), a rear stopper (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 stopper and the rear stopper.

5. The rail clamp for a track-movable lifting work platform according to claim 1 or 2, characterized in that: The first track-clamping wheels (323) include at least two and are arranged in the left-right direction; the second track-clamping wheels (333) include at least two and are arranged in the left-right direction.

6. The rail clamp for a track-movable lifting work platform according to claim 1 or 2, characterized in that: The first clamping member and the second clamping member are both provided with hooks. When the first rail-clamping wheel and the second rail-clamping wheel move toward each other to clamp the rail, the hooks hook the rail and maintain a gap with the rail.

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