CN214879548U

CN214879548U - Lifting device for trolley frame

Info

Publication number: CN214879548U
Application number: CN202120562208.8U
Authority: CN
Inventors: 邬勇勇; 张跃; 吴建坤; 薛晖; 范旭东; 孟成宇
Original assignee: Ningbo Cosco Jetty Management Co Ltd
Current assignee: Ningbo Cosco Jetty Management Co Ltd
Priority date: 2021-03-18
Filing date: 2021-03-18
Publication date: 2021-11-26
Anticipated expiration: 2031-03-18

Abstract

The utility model relates to the technical field of lifting devices, in particular to a lifting device for a trolley frame, which comprises a trolley frame main body, wherein the top of the trolley frame main body is fixedly connected with a mounting plate, a first motor is fixedly arranged on the mounting plate, the output shaft end part of the first motor is coaxially connected with a rotating shaft, the rotating shaft is horizontally arranged, a winding drum is fixedly arranged on a shaft body of the rotating shaft, a box body is fixedly arranged at one side of the mounting plate, which is close to the winding drum, part of the shaft body of the rotating shaft is positioned in the box body, a brake component is arranged in the box body and comprises a driving shaft which is horizontally arranged, a screw rod section is arranged on the shaft body of the driving shaft, so that the shaft body of the driving shaft forms a screw rod section and a non-screw rod section, a first brake mechanism for braking the rotating shaft is symmetrically arranged on the screw rod section by taking the rotating shaft as a center, the lifting device for the trolley frame successively brakes the winding drum and the rotating shaft from two different directions, the braking effect is better, can reduce the potential safety hazard effectively.

Description

Lifting device for trolley frame

Technical Field

The utility model relates to a play to rise technical field, specifically speaking relates to a dolly frame is with playing to rise device.

Background

The trolley frame is widely used in the industrial field of cranes, and is mainly used for erecting various parts of the crane on a track beam, and a lifting device is generally arranged on the trolley frame to lift heavy objects. However, the conventional trolley frame lifting device has poor emergency braking function, and when the lifting device breaks down, the lifting device cannot be effectively braked in time, so that the safety potential hazard is great. In view of this, we propose a lifting device for a trolley frame.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a dolly frame is with playing to rise device to solve at least one problem that proposes in the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme:

a lifting device for a trolley frame comprises a trolley frame main body, wherein an installation plate is fixedly connected to the top of the trolley frame main body, a first motor is fixedly installed on the installation plate, a rotating shaft is coaxially connected to the end portion of an output shaft of the first motor, the rotating shaft is horizontally arranged, a winding drum is fixedly installed on a shaft body of the rotating shaft, a box body is fixedly installed on one side, close to the winding drum, of the installation plate, part of the shaft body of the rotating shaft is located inside the box body, and a braking assembly is arranged inside the box body;

the brake assembly comprises a driving shaft which is horizontally arranged, a screw rod section is arranged on a shaft body of the driving shaft so that the shaft body of the driving shaft forms the screw rod section and a non-screw rod section, and first brake mechanisms for braking the rotating shaft are symmetrically arranged on the screw rod section by taking the rotating shaft as a center; the brake assembly further comprises a second brake mechanism for braking the winding drum, and the brake direction of the first brake mechanism is perpendicular to the brake direction of the second brake mechanism.

Preferably, the second brake mechanism comprises a fixed plate and a brake plate, a plurality of springs are arranged between the brake plate and the fixed plate, two ends of each spring are fixedly connected with the fixed plate and the brake plate respectively, and a driving mechanism used for driving the fixed plate to move along the length direction of the rotating shaft is arranged on the non-screw rod section.

Preferably, actuating mechanism includes second motor, gear and rack, gear fixed mounting be in on the non-lead screw section of drive shaft axis body, the gear with the rack meshes mutually, the one end of rack with fixed plate fixed connection, the rack is kept away from one side fixedly connected with slider of gear, the spout has been seted up to the bottom inner wall of box, slider sliding connection be in the spout, second motor fixed mounting be in on the box, the output shaft tip of second motor with drive shaft coaxial coupling.

Preferably, one side of the brake plate close to the winding drum is fixedly connected with a first protection pad.

Preferably, the first protection pad is made of synthetic rubber.

Preferably, the first brake mechanism comprises an adjusting block and a brake block, the brake block is fixedly connected with the adjusting block, two nuts are connected to the screw rod section in a threaded mode and are respectively fixedly connected to the two adjusting blocks, the thread directions of the two nuts are opposite, a strip-shaped block is fixedly connected to the inner wall of the bottom of the box body, a groove is formed in the bottom of the adjusting block, and the strip-shaped block is connected with the groove in a sliding mode.

Preferably, a second protection pad is fixedly connected to one side of the brake block close to the rotating shaft.

Preferably, the second protection pad is made of synthetic rubber.

Preferably, the outer wall of the winding drum is fixedly connected with a lifting rope, and the bottom end of the lifting rope is fixedly connected with a lifting hook.

Preferably, a bearing seat is fixedly mounted on one side, far away from the mounting plate, of the top of the frame main body, and one end, far away from the first motor, of the rotating shaft is rotatably connected with the bearing seat.

Compared with the prior art, the beneficial effects of the utility model are that: according to the lifting device for the trolley frame, through the arrangement of the brake assembly, when the lifting device is abnormal, the winding drum can be braked from one direction through the second brake mechanism, so that the rotating force of the winding drum is reduced, after the winding drum is braked, the rotating shaft is braked from the brake direction perpendicular to the second brake mechanism through the first brake mechanism, the rotating force of the rotating shaft is reduced on the basis of reducing the rotating force of the winding drum, the braking effect is better, and the double braking effect is achieved; the winding drum and the rotating shaft are successively braked from two different directions, so that the stability of the winding drum and the rotating shaft during braking can be enhanced, the braking effect is further enhanced, the potential safety hazard can be effectively reduced, the problems that the conventional trolley lifting device is poor in emergency braking function, and the lifting device cannot be timely and effectively braked when in fault, and has a large potential safety hazard are solved.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a schematic view of the sectional structure of the middle box body of the present invention.

Fig. 3 is an enlarged schematic view of a portion a in fig. 2 according to the present invention.

Fig. 4 is a schematic structural diagram of the middle brake assembly of the present invention.

The meaning of the reference symbols in the figures is: 1. a frame main body; 20. mounting a plate; 21. a first motor; 22. a rotating shaft; 23. a reel; 24. lifting a lifting rope; 25. lifting a lifting hook; 26. a bearing seat; 3. a box body; 30. a chute; 31. a bar-shaped block; 4. a brake assembly; 40. a drive shaft; 400. a screw section; 41. a gear; 42. a rack; 420. a slider; 430. a fixing plate; 431. a brake plate; 432. a spring; 44. an adjusting block; 440. a groove; 45. a brake pad; 46. a second motor.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

The utility model provides a technical scheme:

referring to fig. 1, a lifting device for a trolley frame comprises a trolley frame body 1, wherein a mounting plate 20 is fixedly connected to the top of the trolley frame body 1, a first motor 21 is fixedly mounted on the mounting plate 20, a rotating shaft 22 is coaxially connected to an output shaft end of the first motor 21, the rotating shaft 22 is horizontally arranged, a winding drum 23 is fixedly mounted on a shaft body of the rotating shaft 22, and the rotating shaft 22 and the winding drum 23 can be driven to rotate by starting the first motor 21.

In this embodiment, the outer wall of the winding drum 23 is fixedly connected with a lifting rope 24, the bottom end of the lifting rope 24 is fixedly connected with a lifting hook 25, and the winding drum 23 can drive the lifting rope 24 and the lifting hook 25 to lift when rotating. When the lifting hook 25 is lifted, the weight hook is lifted, and when the lifting hook 25 is lifted, the weight can be lifted.

Referring to fig. 1, a bearing seat 26 is fixedly installed on a side of the top of the frame body 1 away from the mounting plate 20, and one end of the rotating shaft 22 away from the first motor 21 is rotatably connected with the bearing seat 26, so that the rotating shaft 22 can rotate more stably through the arrangement of the bearing seat 26.

Referring to fig. 1, in the present embodiment, a box 3 is fixedly disposed on a side of the mounting plate 20 close to the winding drum 23, and a part of the shaft body of the rotating shaft 22 is located inside the box 3.

Referring to fig. 2, a braking assembly 4 is disposed inside the box 3.

Specifically, referring to fig. 4, the brake assembly 4 includes a horizontally disposed driving shaft 40, and a screw rod section 400 is disposed on a shaft body of the driving shaft 40, so that the shaft body of the driving shaft 40 forms the screw rod section 400 and a non-screw rod section.

More specifically, referring to fig. 1-4, the brake assembly 4 further includes a second brake mechanism for braking the spool 23. The second brake mechanism comprises a fixed plate 430 and a brake plate 431, a plurality of springs 432 are arranged between the brake plate 431 and the fixed plate 430, two ends of each spring 432 are respectively and fixedly connected with the fixed plate 430 and the brake plate 431, and a driving mechanism for driving the fixed plate 430 to move along the length direction of the rotating shaft 22 is arranged on a non-screw rod section.

In this embodiment, a fixing plate 430 is disposed on a side of the case 3 close to the winding drum 23, and a braking plate 431 for braking the winding drum 23 is disposed on a side of the fixing plate 430 away from the case 3.

In this embodiment, the driving mechanism includes a second motor 46, a gear 41 and a rack 42, the gear 41 is fixedly installed on a non-threaded rod section of the shaft body of the driving shaft 40, the gear 41 is engaged with the rack 42, one end of the rack 42 is fixedly connected with the fixing plate 430, one side of the rack 42 away from the gear 41 is fixedly connected with a slider 420, the inner wall of the bottom of the box body 3 is provided with a sliding groove 30, the slider 420 is slidably connected in the sliding groove 30, the second motor 46 is fixedly installed on the box body 3, and an end portion of an output shaft of the second motor 46 is coaxially connected with the driving shaft 40.

When the hoisting device is used and emergency braking is required to be performed on the hoisting device, the second motor 46 is started to work, the driving shaft 40 is driven to rotate, so that the gear 41 on the driving shaft 40 is driven to rotate, the gear 41 is meshed with the rack 42, the rack 42 is driven to move, the fixing plate 430 is pushed to move towards the winding drum 23, the fixing plate 430 moves, the braking plate 431 is driven to move synchronously, the braking plate 431 is abutted against the side wall of the winding drum 23, and therefore the rotating speed of the winding drum 23 is reduced to brake the winding drum.

It should be added that a first protection pad is fixedly connected to one side of the braking plate 431 close to the winding drum 23. And the first protection pad is made of synthetic rubber. When the braking plate 431 is abutted against the side wall of the winding drum 23 for braking, the first protection pad can be in direct contact with the winding drum 23, the hardness of the synthetic rubber material is low, the abrasion between the braking plate 431 and the winding drum 23 can be reduced in the braking process, and the winding drum 23 can be well protected.

Further, referring to fig. 2 and 4, the screw rod section 400 is symmetrically provided with a first braking mechanism for braking the rotating shaft 22 with the rotating shaft 22 as a center. The braking direction of the first braking mechanism is perpendicular to the braking direction of the second braking mechanism.

Referring to fig. 2 and 4, in the present embodiment, the first braking mechanism includes an adjusting block 44 and a braking block 45, the braking block 45 is fixedly connected to the adjusting block 44, two nuts are connected to the screw rod section 400 by threads, and the two nuts are respectively fixedly connected to the two adjusting blocks 44, wherein the thread directions of the two nuts are opposite, a bar block 31 is fixedly connected to the inner wall of the bottom of the box body 3, a groove 440 is formed at the bottom of the adjusting block 44, and the bar block 31 is slidably connected to the groove 440.

When the second motor 46 is started to work, the driving shaft 40 is driven to rotate, the driving mechanism drives the braking plate 431 to brake the winding drum 23 at the moment, when the winding drum 23 brakes, the driving shaft 40 also drives the two adjusting blocks 44 on the screw rod section 400 to move close to each other, so that the two braking blocks 45 can be driven to move close to each other, the rotating shaft 22 is clamped by the two braking blocks 45 to perform deceleration braking on the rotating shaft, the winding drum 23 and the rotating shaft 22 are braked respectively, double braking can be realized, and the braking effect is more obvious.

In a specific use process, a heavy object to be lifted is hung by the lifting hook 25; the first motor 21 is started to work, the rotating shaft 22 and the winding drum 23 are driven to rotate, the lifting rope 24 and the lifting hook 25 can be driven to lift, and therefore a heavy object can be lifted; when the rotating speeds of the rotating shaft 22 and the winding drum 23 are abnormal and braking is needed, the driving mechanism is started to work, the braking plate 431 can be driven to prop against the winding drum 23 from one direction, the second braking mechanism starts to work, at the moment, the spring 432 starts to compress, the braking force of the braking plate 431 on the winding drum 23 is increased, the rotating force of the winding drum 23 is reduced to realize braking on the winding drum 23, when the spring 432 continues to compress to a set length, at the moment, the first braking mechanism starts to work, the two braking blocks 45 move close to each other to clamp the rotating shaft 22, and the rotating force of the rotating shaft 22 is reduced to brake the rotating shaft 22.

In the actual braking process, if the spring 432 is compressed to a set length, the hoisting device is braked and stopped by the braking of the winding drum 23 by the second braking mechanism, at the moment, the spring 432 is stopped to be compressed, the first braking mechanism cannot be triggered, and the working loss of the first braking mechanism can be reduced; if the spring 432 is compressed to a set length, the second brake mechanism cannot completely brake and stop the winding drum 23, at this time, the spring 432 is continuously compressed, and the first brake mechanism triggers the rotating shaft 22 to brake again until the hoisting device is braked and stopped.

The spring 432 is used for respectively controlling the triggering of the second brake mechanism and the first brake mechanism, when only one second brake mechanism is needed for braking, the compression force applied to the spring 432 is small, and the damage to the spring 432 can be reduced.

If the second brake mechanism and the first brake mechanism are both triggered to brake, when the second brake mechanism brakes and the first brake mechanism does not brake, the working load of the second motor 46 is smaller, the energy consumption of the second motor 46 is lower, better energy conservation is achieved, and the second motor 46 can be well protected.

Through braking again countershaft 22 on the braking basis of braking reel 23, realize dual braking, braking effect is better, brakies reel 23 and pivot 22 respectively from two not equidirectional simultaneously, can make reel 23 and pivot 22 braking process more stable, and it is better to have further strengthened braking effect.

In this embodiment, a second protection pad is fixedly connected to one side of the brake block 45 close to the rotating shaft 22. The second protective pad is made of synthetic rubber. When the brake block 45 clamps the rotating shaft 22, the second protection pad can reduce the abrasion of the brake block 45 to the rotating shaft 22, can well protect the rotating shaft 22 and prolong the service life of the rotating shaft 22.

When the hoisting device for the trolley frame is used, the rotating speed measuring instrument can be arranged on the rotating shaft 22, the rotating speeds of the rotating shaft 22 and the winding drum 23 can be measured through the rotating speed measuring instrument, and when the rotating speeds of the rotating shaft 22 and the winding drum 23 are abnormal, the braking component 4 can be controlled to brake the rotating shaft 22 and the winding drum 23.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It should be understood by those skilled in the art that the present invention is not limited by the above embodiments, and the description in the above embodiments and the description is only preferred examples of the present invention, and is not intended to limit the present invention, and that the present invention can have various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications all fall into the scope of the claimed invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a dolly frame is with rising device which characterized in that: the bicycle frame comprises a bicycle frame main body (1), wherein a mounting plate (20) is fixedly connected to the top of the bicycle frame main body (1), a first motor (21) is fixedly mounted on the mounting plate (20), a rotating shaft (22) is coaxially connected to the end part of an output shaft of the first motor (21), the rotating shaft (22) is horizontally arranged, a winding drum (23) is fixedly mounted on a shaft body of the rotating shaft (22), a box body (3) is fixedly arranged on one side, close to the winding drum (23), of the mounting plate (20), part of the shaft body of the rotating shaft (22) is located inside the box body (3), and a brake assembly (4) is arranged inside the box body (3);

the brake assembly (4) comprises a driving shaft (40) which is horizontally arranged, a screw rod section (400) is arranged on the shaft body of the driving shaft (40) so that the shaft body of the driving shaft (40) forms the screw rod section (400) and a non-screw rod section, and first brake mechanisms for braking the rotating shaft (22) are symmetrically arranged on the screw rod section (400) by taking the rotating shaft (22) as a center; the brake assembly (4) further comprises a second brake mechanism for braking the winding drum (23), and the brake direction of the first brake mechanism is perpendicular to the brake direction of the second brake mechanism.

2. The hoist for the cart base according to claim 1, characterized in that: the second brake mechanism comprises a fixed plate (430) and a brake plate (431), a plurality of springs (432) are arranged between the brake plate (431) and the fixed plate (430), two ends of each spring (432) are respectively fixedly connected with the fixed plate (430) and the brake plate (431), and a driving mechanism for driving the fixed plate (430) to move along the length direction of the rotating shaft (22) is arranged on the non-screw rod section.

3. The hoist for the cart base according to claim 2, characterized in that: the driving mechanism comprises a second motor (46), a gear (41) and a rack (42), the gear (41) is fixedly installed on a non-screw rod section of a shaft body of the driving shaft (40), the gear (41) is meshed with the rack (42), one end of the rack (42) is fixedly connected with the fixing plate (430), the rack (42) is far away from one side of the gear (41) and is fixedly connected with a sliding block (420), the inner wall of the bottom of the box body (3) is provided with a sliding groove (30), the sliding block (420) is slidably connected in the sliding groove (30), the second motor (46) is fixedly installed on the box body (3), and the end part of an output shaft of the second motor (46) is coaxially connected with the driving shaft (40).

4. The hoist for the cart base according to claim 2, characterized in that: one side of the brake plate (431) close to the winding drum (23) is fixedly connected with a first protection pad.

5. The hoist for the cart base according to claim 4, characterized in that: the first protection pad is made of synthetic rubber.

6. The hoist for the cart base according to claim 1, characterized in that: first arrestment mechanism includes regulating block (44) and brake pad (45), brake pad (45) with regulating block (44) fixed connection, threaded connection has two nuts on lead screw section (400), two the nut is fixed connection respectively two on regulating block (44), wherein, two the screw thread opposite direction of nut, the bottom inner wall fixed connection of box (3) has bar piece (31), recess (440) are seted up to the bottom of regulating block (44), bar piece (31) with recess (440) sliding connection.

7. The hoist for the cart base according to claim 6, characterized in that: and a second protective pad is fixedly connected to one side, close to the rotating shaft (22), of the brake block (45).

8. The hoist for the cart base according to claim 7, characterized in that: the second protection pad is made of synthetic rubber.

9. The hoist for the cart base according to claim 1, characterized in that: fixedly connected with plays to rise lifting rope (24) on the outer wall of reel (23), the bottom fixedly connected with that plays to rise lifting rope (24) plays to rise lifting hook (25).

10. The hoist for the cart base according to claim 1, characterized in that: the top of frame main part (1) is kept away from one side fixed mounting of mounting panel (20) has bearing frame (26), pivot (22) are kept away from the one end of first motor (21) with bearing frame (26) are rotated and are connected.