Low-clearance double-beam trolley frame for crane and double-beam trolley

Abstract

The utility model relates to the technical field of crane equipment, in particular to a low-clearance double-beam trolley frame for a crane and a double-beam trolley. The driving wheel set is in transmission connection with a driving mechanism, a mounting frame is arranged in the middle of the vehicle body frame, a lifting device is mounted at the lower end of the mounting frame, the mounting frame is fixedly connected with the side face of the vehicle body frame, a lifting drive mounting mechanism is arranged at the joint of one end of the mounting frame, and a rope mounting mechanism is arranged at the joint of the other end of the mounting frame; the middle of the mounting frame extends downwards to form a guide support, a first pulley mechanism is arranged at the lower end of the guide support, a second pulley mechanism is arranged at the joint of the upper end of the guide support and the mounting frame, and a control box is mounted on the mounting frame of the double-beam trolley frame and is in telecommunication connection with a remote controller. After the prior art is improved, the hoisting height of the crane is increased, and the crane can be used in places requiring small overall height of the crane and low clearance height of a plant.

Description

Technical Field

[0001] The utility model relates to the technical field of crane equipment, in particular to a low-headroom double-beam trolley frame and a double-beam trolley for a crane. Background Art

[0002] At present, old-style factory buildings still occupy a considerable share in China, and their lifting height is limited. In order to save construction costs, new factory buildings require low building heights. These factory buildings have limited heights and the space above the track surface is relatively small, but there are strict requirements on the lifting height of heavy objects, which has given rise to the emergence of offset-hung and low-clearance cranes.

[0003] For example, a Chinese patent document with authorization number CN211871192U discloses a double-beam low-headroom trolley, which includes a car body, a driving wheel group, a passive wheel group, a lifting device, two crane main beams, and tracks arranged on the two crane main beams. The driving wheel group includes a driving motor, two driving wheels, and a driving wheel shaft. Each driving wheel rolls on a corresponding track. The driving wheel shaft passes through the car body to connect the two driving wheels. The driving motor is arranged inside the car body and is connected to the driving wheel shaft through gear meshing. The passive wheel group includes two passive wheels and a passive wheel shaft. Each passive wheel rolls on a corresponding track. The passive wheel shaft passes through the car body to connect the two passive wheels. The lifting device is suspended at the bottom of the car body through a hanging plate. Although the above-mentioned double-beam low-headroom trolley realizes the lifting height of heavy objects by setting four wheels on the top of the two crane main beams to roll, its maximum lifting height can still only be located at the lower end of the lifting device under the car body.

[0004] Therefore, it is necessary to improve the deficiencies in the above prior art. Summary of the invention

[0005] The technical problem to be solved by the utility model is to provide a low-headroom double-beam trolley frame and a double-beam trolley for a crane in view of the deficiencies of the above-mentioned prior art, so as to solve the problem that the maximum lifting height in the prior art can only be located at the lower end of the lifting device under the vehicle body.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a low-headroom double-beam trolley frame for a crane, comprising a body frame, a driving wheel group and a passive wheel group installed on the body frame, the driving wheel group is transmission-connected with a driving mechanism fixedly installed on the body frame, a mounting frame for installing a lifting device is provided in the middle of the body frame, the mounting frame is fixedly connected to the side of the body frame and a lifting drive mounting mechanism is provided at one end connection and a rope mounting mechanism is provided at the other end connection, a guide bracket is provided at the middle of the mounting bracket extending downward, a first pulley mechanism is provided at the lower end of the guide bracket, and a second pulley mechanism is provided at the upper end connection with the mounting frame.

[0007] By adopting the above technical scheme, the rope driving mechanism of the lifting device is installed at the lifting driving installation mechanism, the rope winding port at the lower end of the rope driving mechanism of the lifting device extends out and is wound from the first pulley mechanism to the second pulley mechanism and then passes through the hook pulley, and then is fixedly installed on the rope installation mechanism; when the lifting device is started to lift and wind the rope, the hook can rise to the position of the rope installation mechanism at the highest, that is, the position where the lower end of the vehicle frame is basically flush with the rope driving mechanism of the lifting device, thereby increasing the lifting height of the crane, which can meet the requirements of the overall height of the crane being small and the clearance height of the factory building being low.

[0008] The above technical solution is further configured as follows: the lifting drive installation mechanism includes a lifting drive hanger installed on a mounting frame, and a lifting installation hole is provided at the lower end of the lifting drive hanger.

[0009] By adopting the above technical solution, the top end of the rope driving mechanism of the lifting device is fixedly mounted on the mounting frame through the lifting mounting hole.

[0010] The above technical solution is further configured as follows: the rope installation mechanism includes a rope hanger fixedly installed at the lower end of the installation frame, and a rope installation hole is provided at the lower end of the rope hanger.

[0011] By adopting the above technical solution, the rope can pass through the rope installation hole and be tied to the rope hanger, thereby fixing the end of the rope.

[0012] The above technical solution is further configured as follows: a slot is further provided at the lower end of the rope hanger, and the slot is communicated with the rope installation hole.

[0013] With the above technical solution, when an electric chain hoist is used, the chain can pass through the slot, and then the end of the chain can be fixed to the rope hanger by a pin or a bolt.

[0014] The above technical solution is further configured as follows: the first pulley mechanism includes a first fixed pulley and a first limiting wheel, and the second pulley mechanism includes a second fixed pulley and a second limiting wheel.

[0015] By adopting the above technical solution, when lifting heavy objects, the first fixed pulley and the second fixed pulley guide the rope to change the direction of the rope; the first limiting pulley and the second limiting pulley limit the rope to prevent the rope from falling off.

[0016] The above technical solution is further configured as follows: the driving wheel group includes a driving wheel shaft and two driving wheels installed at both ends of the driving wheel shaft, and the driving wheel shaft is rotatably connected to the vehicle body frame.

[0017] By adopting the above technical solution, the driving wheel shaft rotates under the drive of the driving mechanism, further driving the two driving wheels to rotate, thereby rolling on the top of the crane main beam.

[0018] The above technical solution is further configured as follows: the driving mechanism includes a mounting plate arranged at the lower end of the vehicle body frame, and a driving motor fixedly mounted on the mounting plate, and the rotating shaft of the driving motor is meshedly connected with the driving wheel shaft through gears.

[0019] With the above technical solution, the driving motor drives the active wheel shaft to rotate through the gears, and further drives the two active wheels to rotate, thereby rolling on the top of the crane main beam.

[0020] The above technical solution is further configured as follows: the passive wheel group includes a passive wheel shaft and two passive wheels installed at both ends of the passive wheel shaft, and the passive wheel shaft is rotatably connected to the vehicle body frame.

[0021] With the above technical solution, driven by the active wheel set, the two passive wheels also roll on the top of the crane main beam.

[0022] The above technical solution is further configured as follows: a rope limiting frame rotatably connected to the rope installation mechanism is provided on one side of the guide bracket, the rope limiting frame is rotatably connected to a rope limiting member, and a rope limiting hole is provided in the middle of the rope limiting member.

[0023] By adopting the above technical solution, the rope passes through the rope limiting member through the rope limiting hole to limit the reeling end of the rope, thereby reducing shaking, and the position of the hook can be fine-tuned by rotating the rope limiting frame.

[0024] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a low-headroom double-beam trolley for a crane, comprising the above-mentioned double-beam trolley frame, a lifting device installed on a mounting frame of the double-beam trolley frame, a control box installed on the mounting frame of the double-beam trolley frame, and the control box is telecommunication-connected to a remote control.

[0025] By adopting the above technical solution, the control box is controlled by the command button on the remote control to control the lifting device to lift and lower the heavy object, and the maximum lifting height can be the lower end of the mounting frame of the double-beam trolley frame.

[0026] The beneficial effects achieved by the utility model are: the lifting height of the crane is increased, and the use of the crane can be satisfied in places requiring a small overall height of the crane and a low clearance height of the workshop. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the structure of the double-beam trolley in the embodiment of the utility model. Figure 1 ;

[0028] Figure 2 This is a schematic diagram of the structure of the double-beam trolley in the embodiment of the utility model. Figure 2 ;

[0029] Figure 3 This is a schematic diagram of the structure of the double-beam trolley frame in the embodiment of the utility model. Figure 1 ;

[0030] Figure 4 This is a schematic diagram of the structure of the double-beam trolley frame in the embodiment of the utility model. Figure 2 ;

[0031] Figure 5 yes Figure 4 Partial view at point A in the middle. DETAILED DESCRIPTION

[0032] 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.

[0033] The embodiment of the double beam trolley of the utility model: Figure 1-5 As shown in, a low clearance double-beam trolley for a crane comprises a body frame 1, a driving wheel group 2, and a passive wheel group 3. The driving wheel group 2 is connected to a driving mechanism 4 in a transmission manner. A mounting frame 5 is provided in the middle of the body frame 1. A lifting device 9 is installed at the lower end of the mounting frame 5. The mounting frame 5 is fixedly connected to the side of the body frame 1 and a lifting drive mounting mechanism is provided at one end of the connection and a rope mounting mechanism is provided at the other end of the connection. A guide bracket 51 is extended downward from the middle of the mounting frame 5. A first pulley mechanism 6 is provided at the lower end of the guide bracket 51 and a second pulley mechanism 7 is provided at the upper end connected to the mounting frame 5. The mounting frame 5 of the double-beam trolley frame A control box 8 is installed on it, and the control box 8 is telecommunication-connected to a remote control 80; the lifting drive installation mechanism includes a lifting drive hanger 52 installed on the mounting frame 5, and a lifting installation hole 520 is provided at the lower end of the lifting drive hanger 52; the rope installation mechanism includes a rope hanger 53 fixedly installed at the lower end of the mounting frame 5, and a rope installation hole 530 is provided at the lower end of the rope hanger 53, and a slot 531 is also provided at the lower end of the rope hanger 53, and the slot 531 is communicated with the rope installation hole 530; when a chain electric hoist is used, the chain can pass through the slot 531, and then the end of the chain can be fixed to the rope hanger by a pin or a bolt.

[0034] The first pulley mechanism 6 includes a first fixed pulley 61 and a first limiting wheel 62 , and the second pulley mechanism 7 includes a second fixed pulley 71 and a second limiting wheel 72 .

[0035] The driving wheel group 2 includes a driving wheel shaft 21 and two driving wheels 22 installed at both ends of the driving wheel shaft 21, and the driving wheel shaft 21 is rotatably connected to the vehicle frame 1; the driving mechanism 4 includes a mounting plate 40 arranged at the lower end of the vehicle frame 1, and a driving motor 41 fixedly installed on the mounting plate 40, and the rotating shaft of the driving motor 41 is connected to the driving wheel shaft 21 through gear meshing; the passive wheel group 3 includes a passive wheel shaft 31 and two passive wheels 32 installed at both ends of the passive wheel shaft 31, and the passive wheel shaft 31 is rotatably connected to the vehicle frame 1; By pressing the control command on the remote control 80, the drive motor 41 can be started to drive the active wheel shaft 21 to rotate, so that the active wheel 22 and the passive wheel 32 roll on the top of the crane main beam, so that the double-beam trolley can transport the heavy object to the designated position; the active wheel 22 and the passive wheel 32 can be trackless (the vehicle body is framed and provided with a limit bearing abutting against the side of the crane main beam) or a tracked structure (a groove is provided in the middle of the wheel circumference, which can cooperate with the track on the crane main beam) to prevent the trolley from deviating from the track and falling off when moving.

[0036] A rope limiting frame 54 is provided on one side of the guide bracket 51 close to the rope mounting mechanism 53 and is rotatably connected to the guide bracket 51. The rope limiting frame 54 is rotatably connected to a rope limiting member 55. A rope limiting hole 550 is provided in the middle of the rope limiting member 55. The rope passes through the rope limiting member 55 through the rope limiting hole 550 to limit the winding end of the rope and reduce shaking. The position of the hook 93 can be fine-tuned by rotating the rope limiting member 55.

[0037] The lifting device 9 can adopt a chain electric hoist or a wire rope electric hoist. This embodiment takes the wire rope electric hoist as an example for explanation. The wire rope electric hoist includes a drum 91 (i.e., a rope driving mechanism), a wire rope 92, and a hook 93. The wire rope 92 extending from the winding port of the drum 91 is wound from between the first fixed pulley 61 and the first limiting wheel 62 to between the second fixed pulley 71 and the second limiting wheel 72, and then passes through the pulley in the hook 93, and then passes through the rope mounting hole 530 to be tied to the rope hanger 53; when the drum 91 is started by the remote control 80 to lift and reel in the wire rope 92, the hook 93 can rise to the lower end position of the rope hanger 53, that is, the lower end of the vehicle frame 1 is basically flush with the upper end of the drum 91, thereby increasing the lifting height of the crane, which can meet the requirements of the overall height of the crane being small and the clearance height of the factory building being low.

[0038] An embodiment of the double-beam trolley frame of the present invention: The structure of the double-beam trolley frame in this embodiment is the same as the structure of the double-beam trolley frame in the embodiment of the above-mentioned double-beam trolley, so it will not be repeated.

Claims

1. A low-headroom double-beam trolley frame for a crane, comprising a body frame, a driving wheel set and a passive wheel set mounted on the body frame, wherein the driving wheel set is transmission-connected to a driving mechanism fixedly mounted on the body frame, and a mounting frame for mounting a lifting device is provided in the middle of the body frame, characterized in that: The mounting frame is fixedly connected to the side of the vehicle body frame and is provided with a lifting drive mounting mechanism at one end and a rope mounting mechanism at the other end. A guide bracket is extended downward from the middle of the mounting frame, and a first pulley mechanism is provided at the lower end of the guide bracket and a second pulley mechanism is provided at the upper end connected to the mounting frame.

2. A low headroom double-beam trolley frame for a crane according to claim 1, characterized in that: The lifting drive installation mechanism comprises a lifting drive pendant installed on a mounting frame, and a lifting installation hole is provided at the lower end of the lifting drive pendant.

3. A low headroom double-beam trolley frame for a crane according to claim 2, characterized in that: The rope installation mechanism comprises a rope hanger fixedly installed at the lower end of the installation frame, and a rope installation hole is arranged at the lower end of the rope hanger.

4. A low headroom double-beam trolley frame for a crane according to claim 3, characterized in that: The lower end of the rope hanger is also provided with a slot, and the slot is connected to the rope installation hole.

5. A low headroom double-beam trolley frame for a crane according to any one of claims 1 to 4, characterized in that: The first pulley mechanism includes a first fixed pulley and a first limiting wheel, and the second pulley mechanism includes a second fixed pulley and a second limiting wheel.

6. A low headroom double-beam trolley frame for a crane according to claim 5, characterized in that: The driving wheel group comprises a driving wheel shaft and two driving wheels installed at both ends of the driving wheel shaft, and the driving wheel shaft is rotatably connected to the vehicle body frame.

7. A low headroom double-beam trolley frame for a crane according to claim 6, characterized in that: The driving mechanism comprises a mounting plate arranged at the lower end of the vehicle body frame and a driving motor fixedly mounted on the mounting plate. The rotating shaft of the driving motor is meshedly connected with the driving wheel shaft through gears.

8. A low headroom double-beam trolley frame for a crane according to claim 7, characterized in that: The passive wheel group comprises a passive wheel shaft and two passive wheels installed at two ends of the passive wheel shaft, and the passive wheel shaft is rotatably connected to the vehicle body frame.

9. A low headroom double-beam trolley frame for a crane according to claim 8, characterized in that: A rope limiting frame rotatably connected to the guide bracket is provided on one side of the guide bracket close to the rope installation mechanism. The rope limiting frame is rotatably connected to a rope limiting member, and a rope limiting hole is provided in the middle of the rope limiting member.

10. A low headroom double beam trolley for a crane, characterized in that: It comprises a double-beam trolley frame as described in any one of claims 1 to 9, and a lifting device installed on a mounting frame of the double-beam trolley frame, a control box is installed on the mounting frame of the double-beam trolley frame, and the control box is connected to a remote control by telecommunications.

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