Electric lift vehicle

Abstract

The utility model discloses an electric lift vehicle, comprising a base frame, a linkage lift frame mounted on the base frame, and a workbench mounted on the top of the linkage lift frame; the base frame comprises a vehicle frame and a plurality of track wheels mounted on the vehicle frame to realize a walking function on a railway track; the vehicle frame is equipped with a crawler climbing assembly. The utility model adds a crawler climbing assembly to the base frame, so that the loading and unloading vehicle of the utility model or the ascending and descending on narrow stairs can be realized by only one person's operation. Compared with the existing structure, the utility model is smaller in size and easier and more convenient to transport and transfer.

Description

Technical Field

[0001] The utility model belongs to the technical field of electrified railway contact network maintenance, and in particular relates to an electric lift vehicle. Background Art

[0002] The catenary maintenance ladder is an essential equipment in the process of electrified railway catenary maintenance. It is usually composed of a base frame, an aluminum alloy scaffolding on it, and two throw-out racks on both sides. The base frame is equipped with anti-dumping insulated rail clamps and insulated casters. Due to its high safety index, it is widely used in the troubleshooting of catenary problems, emergency treatment of circuits and electrical appliances, and routine maintenance. However, this type of catenary maintenance ladder is less convenient and less flexible to use.

[0003] In order to solve the above-mentioned deficiencies of the above-mentioned special ladder car for contact network maintenance, the applicant has designed a new type of electric lift and applied for a utility model patent on December 19, 2022. The patent authorization announcement number is CN219136299U, and the utility model name is an electric lift. The patent adopts a multi-stage frame structure that is slidably connected in sequence, and is equipped with a pulley block unit and a fixed pulley unit to apply a lifting force to lift the frame. The base height of about 2 meters can be climbed to more than 5.5 meters, and it can stop at any height during climbing. It has strong flexibility in use and can fully meet the requirements of the staff for the workbench height during the maintenance of the electrified railway contact network. The base height of about 2 meters also makes it possible to transport and store the utility model without disassembly, and the convenience of use is relatively good.

[0004] However, the chassis of the electric lift is relatively large and the overall structure is a bit bulky, which still makes it difficult to carry in some scenarios. For example, the loading and unloading process during transportation requires the cooperation of multiple people; the transfer of the equipment from the ground to the high platform via the walking ladder also requires multiple people to carry it, and the narrow space of the walking ladder increases the difficulty of the staff to carry the equipment. Utility Model Content

[0005] In order to solve the above deficiencies in the prior art, the utility model aims to provide an electric lift truck to achieve the purpose of easier and more convenient transportation.

[0006] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is as follows: an electric lift vehicle, comprising a base frame, a linkage lift frame mounted on the base frame, and a workbench mounted on the top of the linkage lift frame;

[0007] The underframe includes a frame and a plurality of track wheels mounted on the frame to realize a traveling function on a railway track;

[0008] The vehicle frame is equipped with a crawler stair climbing assembly.

[0009] As a limitation of the present invention, the crawler climbing assembly includes a mounting frame, a double crawler mounted on the mounting frame, and a drive motor fixed to the bottom of the double crawler and connected to the double crawler;

[0010] The mounting frame includes a track support plate hinged on the frame, a bracket hinged on the linkage lifting frame, and a gas spring with one end hinged on the frame and the other end hinged to the middle of the bracket; wherein the free end of the track support plate is rotatably connected to the bottom of the double tracks, and the free end of the bracket is slidably connected to the side of the double tracks so as to be able to slide along the length direction of the double tracks.

[0011] As another limitation of the present invention, the linkage lifting frame includes a frame assembly and a drive assembly;

[0012] The frame assembly includes an outer frame fixed on the vehicle frame, and a first-level lifting frame, ... N-level lifting frames, and an inner frame that are slidably connected from the outside to the inside in sequence, N ≥ 1 and N ∈ Z, the first-level lifting frame is slidably assembled and connected with the outer frame, and the workbench is assembled on the top of the inner frame;

[0013] The driving assembly includes a linear drive fixed vertically on the frame, a sheave assembly mounted on the top of each lifting frame, and a belt wound around the sheave assembly; wherein the power output end of the linear drive is fixedly connected to the primary lifting frame;

[0014] A belt is wound around the groove wheel group of each level of lifting frame, one end of the belt is connected to the top of the outer frame adjacent to the lifting frame of this level, and the other end is connected to the bottom of the inner frame adjacent to the lifting frame of this level.

[0015] As a further limitation of the present invention, the workbench includes a bottom plate fixedly arranged on the top of the inner frame and a work fence detachably connected to the bottom plate.

[0016] Due to the adoption of the above technical solution, the utility model has the following beneficial effects compared with the prior art:

[0017] (1) The utility model mainly optimizes and improves the underframe structure of the electric lift truck. The specific improvement is that a crawler climbing assembly is added to the underframe, so that only one person can operate the loading and unloading vehicle of the utility model or go up and down on narrow stairs. Compared with the existing structure, the utility model is smaller in size and easier to transport and transfer.

[0018] (2) The linkage lifting frame in the utility model optimizes the driving component to provide power with a linear drive (hydraulic cylinder) and transmit the power with a grooved belt. Compared with the previous driving method of wire rope and pulley group, the driving component adopted by the utility model is more reliable and safer. (The service life of wire rope is generally short.)

[0019] (3) The working fence in the workbench of the utility model can be disassembled and placed on the outside of the linkage lifting frame, so that the volume can be reduced in the height direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention is described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0021] Figure 1 This is a schematic diagram of the structure of an embodiment of the utility model (the crawler climbing assembly is half-expanded);

[0022] Figure 2 It is a schematic diagram of the structure of another state of the embodiment of the utility model (the crawler climbing assembly is retracted);

[0023] Figure 3 It is a structural schematic diagram of the base frame, the linkage lifting frame and the workbench in the embodiment of the utility model;

[0024] Figure 4 This is a front view of the structural relationship between the base frame, the linkage lifting frame and the workbench in the embodiment of the utility model;

[0025] Figure 5 This is a structural schematic diagram of a crawler stair climbing assembly in an embodiment of the utility model;

[0026] In the figure: 1. Base frame; 2. Linkage lifting frame; 3. Workbench; 4. Crawler climbing assembly;

[0027] 101. frame; 102. track wheel;

[0028] 201, outer frame; 202, first-level lifting frame; 203, second-level lifting frame; 204, third-level lifting frame; 205, fourth-level lifting frame; 206, inner frame; 207, linear drive; 208, grooved wheel set; 209, belt;

[0029] 301, base plate; 302, working fence;

[0030] 401. Track support plate; 402. Bracket; 403. Gas spring; 404. Double tracks; 405. Drive motor. DETAILED DESCRIPTION

[0031] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and understand the present invention, and are not used to limit the present invention.

[0032] Embodiment An electric lift vehicle

[0033] like Figure 1 , Figure 2 As shown, this embodiment includes a base frame 1 , a linkage lifting frame 2 mounted on the base frame 1 , and a workbench 3 mounted on the top of the linkage lifting frame 2 .

[0034] 1. Base frame 1

[0035] The base frame 1 is the bottom foundation of this embodiment, and is used to realize the movement of the linkage lifting frame 2 and the workbench 3 on the railway track. Figure 3 , Figure 4 As shown, the chassis 1 includes a frame 101 and a plurality of rail wheels 102 mounted on the frame 101. There are four rail wheels 102, which are respectively located at the four corners of the frame 101. The rail wheels 102 can be used to walk on the railway track, so that it is convenient for the staff to push this embodiment to change the maintenance point.

[0036] In this embodiment, among the four track wheels 102, three are insulating wheels and one is a grounding wheel.

[0037] In actual use, when the staff pushes this embodiment to a certain maintenance point, they will use multiple track clamps to position the chassis 1 of this embodiment on the railway track to avoid accidents caused by movement during the work process or affecting the normal progress of the maintenance work.

[0038] Further, such as Figure 1 or Figure 2 As shown, a crawler stair climbing assembly 4 is installed on one side of the vehicle frame 101. With the help of the crawler stair climbing assembly 4, a single person can operate the vehicle of this embodiment to go up and down narrow stairs, or a single person can complete the loading and unloading of the vehicle of this embodiment.

[0039] like Figure 5 As shown, the crawler climbing assembly 4 includes a mounting frame, a double crawler 404 and a drive motor 405. The mounting frame includes a crawler support plate 401 hinged on one side of the frame 101, and two crawler support plates 401 are arranged relatively; a bracket 402 hinged on the linkage lifting frame 2, and the bracket 402 is an H-shaped structure, including two parallel support rods and a reinforcing rod connected between the two support rods; a gas spring 403 with one end hinged on the frame 101 and the other end hinged on the middle of the bracket 402, and two gas springs 403 are arranged relatively, corresponding to one support rod of the bracket 402 respectively.

[0040] The double crawler 404, i.e., a walking structure having two crawlers, adopts an existing structure, and its structure will not be described in detail here. Figure 5 As shown, the bottom of the double track 404 is rotatably connected to the two track support plates 401 to achieve connection with the frame 101 through the track support plates 401; sliding grooves are provided on the two opposite sides of the double track 404, and one sliding groove corresponds to the free end of a support rod in the mounting bracket 402 to achieve connection with the linkage lifting frame 2 through the bracket 402.

[0041] By means of the mounting frame, the double crawler tracks 404 can be deployed at the side of the chassis 1 , or retracted and hidden at the side of the chassis 1 .

[0042] The driving motor 405 is fixedly mounted at the bottom of the double crawler 404, and the power output end is transmission-connected with the double crawler 404 to drive the double crawler 404 to enable it to walk on the ground.

[0043] 2. Linkage lifting frame 2

[0044] The linkage lifting frame 2 is used to control the climbing height of the workbench 3. Figure 3 or Figure 4 As shown, the linkage lifting frame 2 includes a frame assembly and a driving assembly.

[0045] The frame assembly includes an outer frame 201 fixedly mounted on the vehicle frame 101 in the vertical direction, and a first-level lifting frame 202, ... N-level lifting frames, and an inner frame 206 that are slidably connected from the outside to the inside, N ≥ 1 and N∈Z. The first-level lifting frame 202 is slidably assembled with the outer frame 201.

[0046] Specifically, the outer frame 201 includes a first outer frame 201 and a second outer frame 201 fixedly mounted on the vehicle frame 101 in a mirror-symmetrical manner. Figure 3 , Figure 4 As shown, the first outer frame 201 and the second outer frame 201 have the same structure, both of which are rectangular structures surrounded by two columns, a top plate and a bottom plate 301, and a connecting plate is fixed between the two columns and below the top plate.

[0047] The inner frame 206 includes a first inner frame 206 and a second inner frame 206 that are arranged in mirror symmetry. Figure 3 , Figure 4 As shown, the first inner frame 206 has the same structure as the second inner frame 206 , and is also a rectangular structure formed by two columns, a top plate and a bottom plate 301 .

[0048] The lifting frame also includes two sets of lifting frames that are mirror-symmetrically arranged, and are respectively slidably connected between a set of outer frames 201 and an inner frame 206. The structure of the lifting frame is described by taking one set as an example. Figure 3, Figure 4 As shown, the lifting frame in this embodiment is a four-stage lifting structure, that is, N = 4. Each lifting frame is a rectangular structure surrounded by two columns, a top plate and a bottom plate 301.

[0049] The frames of the frame assembly are connected to each other in a sliding manner by adopting the "cooperation mode of the guide rail and the wheel support assembly" disclosed in the utility model patent with the authorization announcement number CN219136299U.

[0050] The driving assembly includes a linear driver 207 vertically fixed at the center of the vehicle frame 101, the power output end of the linear driver 207 faces upward and is fixedly connected to the top of the first-stage lifting frame 202 in the two sets of lifting frames. The power output end of the linear driver 207 extends to drive the first-stage lifting frame 202 to lift relative to the outer frame 201; the power output end of the linear driver 207 retracts to drive the first-stage lifting frame 202 to fall back to its original position. In this embodiment, the linear driver 207 is a cylinder.

[0051] The drive assembly also includes a sheave assembly 208 mounted on the top of each lifting frame and a belt 209 wound around the sheave assembly 208. Figure 3 As shown, a belt 209 is wound around each level of the lifting frame sheave group 208, one end of the belt 209 is connected to the top of the outer frame adjacent to the level of the lifting frame, and the other end is connected to the bottom of the inner frame adjacent to the level of the lifting frame. In this embodiment, two sets of sheaves and belts 209 are provided on each lifting frame.

[0052] When the linear drive 207 drives the primary lifting frame 202 to rise, the sheave group 208 at the top of the primary lifting frame 202 rises relative to the outer frame 201, thereby making the portion of the belt 209 between the sheave group 208 and the top of the outer frame 201 longer, and the portion of the belt 209 between the sheave group 208 and the bottom of the secondary lifting frame 203 shorter accordingly, and the belt 209 as a whole moves to the side of "sheave group 208 and the top of the outer frame 201", thereby achieving the lifting of the secondary lifting frame 203. Similarly, the tertiary lifting frame 204, the quaternary lifting frame 205 and the inner frame 206 are also gradually lifted to the required height.

[0053] It should be noted that the sheave assembly 208 and the belt 209 in this embodiment may also be replaced by a sprocket and a chain.

[0054] 3. Workbench 3

[0055] The workbench 3 is used for workers to stand. Figure 3 , Figure 4As shown, the workbench 3 is fixedly mounted on the top of the inner frame 206, and includes a bottom plate 301 and a working fence 302. The bottom plate 301 is fixedly mounted on the top of the two inner frames 206, and the working fence 302 is detachably mounted on the top of the bottom plate 301 by a plurality of bolts. When not in use, the staff can remove the working fence 302 and make it fall down and be placed outside the linkage lifting frame 2, which can reduce the volume and save the placement space.

[0056] The working process is as follows:

[0057] After installing the present embodiment on the railway track, the present embodiment is pushed to the area where the electrified railway contact network needs to be inspected with the help of the track wheel 102; then the present embodiment is fixed with the track clamp, and the staff stands on the workbench 3 and starts the linear drive 207 to make the linear drive 207 lift the first-level lifting frame 202; at the same time, under the action of the groove wheel groups 208 and belts 209 at each level, the third-level lifting frame 204, the fourth-level lifting frame 205 and the inner frame 206 are also gradually lifted until the workbench 3 on the top of the inner frame 206 rises to the required height, and the rise of the linear drive 207 is stopped.

[0058] When the maintenance work is completed, the linear drive 207 is controlled to retract and the workbench 3 is lowered accordingly.

[0059] It should be noted that the above is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An electric lift vehicle, characterized in that: It includes a base frame, a linkage lifting frame mounted on the base frame, and a workbench mounted on the top of the linkage lifting frame; The underframe includes a frame and a plurality of track wheels mounted on the frame to realize a traveling function on a railway track; The frame is equipped with a crawler stair climbing assembly; The crawler climbing assembly comprises a mounting frame, a double crawler mounted on the mounting frame, and a driving motor fixed at the bottom of the double crawler and connected to the double crawler transmission; The mounting frame includes a track support plate hinged on the frame, a bracket hinged on the linkage lifting frame, and a gas spring with one end hinged on the frame and the other end hinged to the middle of the bracket; wherein the free end of the track support plate is rotatably connected to the bottom of the double tracks, and the free end of the bracket is slidably connected to the side of the double tracks so as to be able to slide along the length direction of the double tracks.

2. The electric lift vehicle according to claim 1, characterized in that: The linkage lifting frame includes a frame assembly and a driving assembly; The frame assembly includes an outer frame fixed on the vehicle frame, and a first-level lifting frame, ... N-level lifting frames, and an inner frame that are slidably connected from the outside to the inside in sequence, N ≥ 1 and N ∈ Z, the first-level lifting frame is slidably assembled and connected with the outer frame, and the workbench is assembled on the top of the inner frame; The driving assembly includes a linear drive fixed vertically on the frame, a sheave assembly mounted on the top of each lifting frame, and a belt wound around the sheave assembly; wherein the power output end of the linear drive is fixedly connected to the primary lifting frame; A belt is wound around the groove wheel group of each level of lifting frame, one end of the belt is connected to the top of the outer frame adjacent to the lifting frame of this level, and the other end is connected to the bottom of the inner frame adjacent to the lifting frame of this level.

3. The electric lift vehicle according to claim 2, characterized in that: The working platform comprises a bottom plate fixedly arranged on the top of the inner frame and a working fence detachably connected to the bottom plate.

Images