Conductive slip ring device of electric forklift
By improving the conductive slip ring device of the shovel truck, adopting an annular fixed disk and clamping disk design, combined with herringbone brush assembly and limit structure, the wear and stability of the shovel truck power receiving device is solved, achieving a longer maintenance cycle and lower maintenance costs.
Patent Information
- Application Number
- CN202422371984.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-27
- Publication Date
- 2025-07-18
- Estimated Expiration
- 2034-09-27
AI Technical Summary
The disc slip ring power receiving device of existing shovel trucks has severe wear, poor stability, frequent replacement of accessories, and high maintenance costs.
The ring-shaped fixed disk and clamping disk design is adopted to reduce the area of the power contacts and use a herringbone elastic brush assembly to ensure the stability and safety of the power reception process, prevent the rotation of the power reception copper ring through the limit structure, and improve the overall operating reliability with fire-proof insulation materials.
It reduces the probability of electric spark generation, extends the maintenance cycle of the device, reduces wear of accessories, and reduces maintenance costs.
Smart Images
Figure CN223124363U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of the current receiving device of a scraper loader, and particularly relates to a conductive slip ring device for an electric scraper loader. Background Art
[0002] A scraper loader is a construction machinery with high operation efficiency, flexibility and wide application. With the continuous promotion and deepening of energy conservation and environmental protection work, electric or hybrid clean energy technologies are mostly adopted for scraper loaders at present. The current receiving devices of the current drag-type electric scraper loaders all adopt disc slip ring current receiving devices. Two copper rings are arranged in the middle of the power transmission disc to clamp the disc slip ring, and a spring is used to make the two copper rings closely adhere to the slip ring to ensure the stability of current receiving. However, in this current receiving mode, there is a large friction area between the two sides of the slip ring and the copper ring. During the current receiving process, the relative movement occurs between the two sides of the slip ring and the copper sheet in contact. Due to the too large contact area, the wear caused by long-term friction leads to the reduction of the contact stability between the slip ring and the copper ring over time, and it is very easy to generate a large number of electric sparks during the current receiving process. To eliminate this potential safety hazard, only the relevant accessories of the conductive slip ring device can be frequently replaced, resulting in a high equipment maintenance cost.
[0003] Therefore, we have designed a conductive slip ring device for an electric scraper loader with high stability and an extended maintenance cycle. Summary of the Utility Model
[0004] The purpose of the utility model is to provide a conductive slip ring device for an electric scraper loader to solve the above problems existing in the prior art.
[0005] To achieve the above purpose, the utility model adopts the following technical solutions:
[0006] A conductive slip ring device for an electric scraper loader includes an assembly shaft, an insulating rod. A plurality of current receiving disc assemblies are closely sleeved side by side on the assembly shaft. A snap ring for preventing the current receiving disc assemblies from falling off the assembly shaft is clamped on the outer side of the front end of the assembly shaft. An electric brush assembly for current receiving is fixed at a position corresponding to each current receiving disc assembly on the insulating rod. The current receiving disc assembly mainly consists of a fixed disc, a current receiving copper ring and a clamping disc. The electric brush assembly for current receiving includes a hoop copper clip and two groups of elastic brush units. A bracket is fixed at both ends of the insulating rod, and the bracket is welded on the bulkhead of the current receiving chamber of the electric scraper loader.
[0007] Furthermore, in order to change the traditional power receiving mode of the disc slip ring, reduce the area of the power receiving contact, and improve the stability of the position of the power receiving contact, both the fixed disc and the clamping disc adopt an annular disc design, so that they can be smoothly sleeved on the assembly shaft after being combined. In order to improve the safety during the power receiving process and provide sufficient operating space for the connection between the electrode and the power receiving copper ring, an isolation ring is provided around the inner ring circumference in the middle of one side of the fixed disc to isolate adjacent power receiving disc components by a certain safety distance, and this safety distance is designed correspondingly according to the power supply size of different types of loaders.
[0008] Furthermore, the clamping disc is sleeved on the isolation ring and fixed to the fixed disc by screws, and the power receiving copper ring is fixedly clamped between the fixed disc and the clamping disc. In order to make the power receiving copper ring achieve a concentric and coaxial effect with the fixed disc and the clamping disc, a circular base for supporting the power receiving copper ring is integrally formed in the middle of the side of the fixed disc where the isolation ring is located, so that the force between the power receiving brush assembly and the power receiving copper ring is uniform during the use of the conductive slip ring device, thereby ensuring that the contact position of the conductive slip ring is stable and controllable.
[0009] Furthermore, in order to facilitate the continuous connection between the cable and the power receiving copper ring, a power connection column passing through the fixed disc is provided on one side of the power receiving copper ring, and a power connection locking nut is screwed on the power connection column. At the same time, a perforation for the power connection column to pass through is also provided on the fixed disc.
[0010] Furthermore, in order to smoothly complete the power receiving process between the moving and static parts, the elastic brush unit is slidably attached to the power receiving copper ring.
[0011] Furthermore, in order to ensure the stability of the power receiving process and enable the power receiving brush assembly and the power receiving disc assembly to always maintain a relatively stable fitting state, the entire power receiving brush assembly adopts a herringbone design. Specifically, the two groups of elastic brush units have the same structure and are symmetrically installed on both sides of the hoop copper clip. The elastic brush unit consists of a support foot, a tension spring, a carbon brush slider, and a copper strip. One end of the support foot is hinged to the side of the hoop copper clip, and the inner side of the other end of the support foot is hinged to the middle position of the top of the carbon brush slider. One end of the copper strip is connected to the carbon brush slider. A pin shaft is provided in the middle of the support foot. The two ends of the tension spring are respectively connected to the bottom of the hoop copper clip and the pin shaft. The carbon brush slider is in sliding fit with the power receiving copper ring.
[0012] Further, in order to ensure the stable installation of the current-receiving brush assembly and enable it to complete the conductive work smoothly, the other end of the copper strip is fixed to the outer side of the open end of the hoop copper clip through a copper buckle and a clamping bolt. The clamping bolt transversely penetrates the copper buckle and the open end of the hoop copper clip. During the process of tightening the clamping bolt, while locking the copper strip through the copper buckle, the open end of the hoop copper clip is also locked, so that the hoop copper clip and the insulating rod are locked by the hoop. Among them, the clamping bolt used to lock the copper strip and the hoop copper clip can serve as the connection terminal of the wire.
[0013] Further, in order to ensure the safety of the conductive slip ring device during the overall operation process, the fixed disk, the base platform and the clamping disk are all designed with fireproof insulation integrally formed. Moreover, the disk edges of the fixed disk and the clamping disk extend outward from both sides of the current-receiving copper ring, and cooperate with the current-receiving copper ring to form a chute for positioning the carbon brush slider.
[0014] Further, since the current-receiving disk assembly and the current-receiving brush assembly are in a relative rotation state during the operation of the entire conductive slip ring device, in order to prevent the current-receiving copper ring from rotating and affecting the current-receiving contact effect, limiting grooves are provided on both sides of the fixed disk and the clamping disk opposite to each other. Positioning blocks that fit the limiting grooves are integrally formed at corresponding positions on both sides of the current-receiving copper ring. At the same time, a limiting key groove is provided along the length direction of the assembly shaft on the inner side of the isolation ring, and a limiting strip that cooperates with the limiting key groove is provided on the surface of the hollow circular shaft of the assembly shaft corresponding to the limiting key groove.
[0015] Further, in order to facilitate the insertion and installation of the cable wire, the assembly shaft includes a hollow circular shaft. Through holes are provided at corresponding positions of each current-receiving disk assembly on the hollow circular shaft. At the same time, avoidance notches are provided at positions of the isolation ring corresponding to the through holes. The end of the assembly shaft is rotatably fitted with the bulkhead of the current-receiving chamber of the electric LHD and extends to the outside of the current-receiving chamber of the electric LHD.
[0016] Beneficial effects:
[0017] The utility model is improved based on the traditional conductive slip ring device of the electric LHD. The current-receiving copper ring is installed with the cooperation of the fixed disk and the clamping disk. A single current-receiving copper ring is used to replace the traditional double copper sheet design, and an elastic chevron-shaped current-receiving brush assembly is used to replace the traditional disk-type current-receiving slip ring, so that the current-receiving contact area of the conductive slip ring device is greatly reduced. During the operation of the LHD, the stability of the contact position is higher, and the probability of generating electric sparks at the current-receiving position of the contact can be effectively reduced. At the same time, the small-area current-receiving friction results in a lower wear rate of the accessories compared with the traditional disk-type slip ring. Moreover, using the carbon brush slider for current-receiving can make the entire conductive slip ring device maintain stable operation for a longer time and have a longer maintenance period compared with the traditional similar devices, and can effectively reduce the maintenance cost of the current-receiving device of the LHD. Brief Description of the Drawings
[0018] Figure 1 Fig. 5 is a top view structural schematic diagram of the current collector slip ring device of the electric LHD of the present utility model;
[0019] Figure 2 Fig. 6 is a structural schematic diagram of the current collector slip ring device of the electric LHD of the present utility model;
[0020] Figure 3 Fig. 7 is a semi-sectional structural schematic diagram of the current collector slip ring device of the electric LHD of the present utility model;
[0021] Figure 4 Fig. 8 is a structural schematic diagram of the disassembled partial structure of the current collector slip ring device of the electric LHD of the present utility model; Figure 1 ;
[0022] Figure 5 Fig. 9 is a structural schematic diagram of the disassembled partial structure of the current collector slip ring device of the electric LHD of the present utility model; Figure 2 ;
[0023] Figure 6 Fig. 10 is a structural schematic diagram of the current collector brush assembly in the current collector slip ring device of the electric LHD of the present utility model.
[0024] In the figures: 1, assembly shaft; 101, hollow circular shaft; 102, wire passing hole; 103, limiting strip; 2, current receiving disc assembly; 201, fixed disc; 202, current receiving copper ring; 203, clamping disc; 204, isolation ring; 205, base; 206, avoidance notch; 207, positioning block; 208, limiting groove; 209, electrical connection post; 210, electrical connection locking nut; 211, limiting keyway; 212, perforation; 3, circlip; 4, current collector brush assembly; 401, hoop copper clip; 402, support foot; 403, pin shaft; 404, tension spring; 405, carbon brush slider; 406, copper buckle; 407, clamping bolt; 408, copper strip; 5, insulating rod; 6, bracket. Detailed Embodiments
[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the present utility model in combination with the drawings and the descriptions of the embodiments or the prior art. Obviously, the following descriptions of the structures of the drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts. It should be noted here that the descriptions of these embodiments are used to help understand the present utility model, but do not constitute a limitation to the present utility model.
[0026] Embodiment:
[0027] In view of the problems of easy wear, poor stability, short maintenance cycle and high cost existing in the current power receiving device of electric loaders, we propose a conductive slip ring device for electric loaders with high stability and an extended maintenance cycle. The specific solution is as follows:
[0028] As Figures 1 - 3 shown, this embodiment specifically includes an assembly shaft 1, an insulating rod 5. A number of power receiving disc assemblies 2 are closely sleeved side by side on the assembly shaft 1. A snap ring 3 for preventing the power receiving disc assemblies 2 from falling off the assembly shaft 1 is clamped on the outer side of the front end of the assembly shaft 1. An electric brush assembly 4 is fixed at the position corresponding to each power receiving disc assembly 2 on the insulating rod 5. The power receiving disc assembly 2 mainly consists of a fixed disc 201, a power receiving copper ring 202 and a clamping disc 203. The electric brush assembly 4 includes a hoop copper clip 401 and two groups of elastic brush units. Brackets 6 are fixed at both ends of the insulating rod 5, and the brackets 6 are welded to the bulkhead of the power receiving chamber of the electric loader.
[0029] In order to change the traditional power receiving mode of the disc slip ring, reduce the area of the power receiving contact point, and improve the stability of the power receiving contact point position, as Figures 1 - 5 shown, the fixed disc 201 and the clamping disc 203 both adopt an annular disc design, so that they can be smoothly sleeved on the assembly shaft 1 after being combined. In order to improve the safety during the power receiving process and provide enough operating space for the connection between the electrode and the power receiving copper ring 202, a separation ring 204 is provided around the inner ring circumference in the middle of one side of the fixed disc 201 to isolate a certain safety distance between adjacent power receiving disc assemblies 2, and this safety distance is correspondingly designed according to the power supply size of different types of loaders.
[0030] As Figures 2 - 5 shown, the clamping disc 203 is sleeved on the separation ring 204 and fixed to the fixed disc 201 by screws to clamp the power receiving copper ring 202 between the fixed disc 201 and the clamping disc 203. In order to make the power receiving copper ring 202 achieve a concentric and coaxial effect with the fixed disc 201 and the clamping disc 203, a circular base 205 for supporting the power receiving copper ring 202 is integrally formed in the middle of the side of the fixed disc 201 where the separation ring 204 is located, so as to ensure uniform force between the electric brush assembly 4 and the power receiving copper ring 202 during the use of the conductive slip ring device, and thus ensure stable and controllable contact at the contact point position of the conductive slip ring.
[0031] In order to facilitate the continuous connection between the cable and the power receiving copper ring 202, as Figures 2 - 5 shown, a power connection post 209 passing through the fixed disc 201 is provided on one side of the power receiving copper ring 202, and a power connection locking nut 210 is screwed on the power connection post 209. At the same time, a perforation 212 for the power connection post 209 to pass through is also provided on the fixed disc 201.
[0032] In order to smoothly complete the power receiving process between the moving and static parts, as Figures 1 - 6 shown, where the elastic brush unit is in sliding contact with the power receiving copper ring 202.
[0033] To ensure the stability of the power receiving process and enable the power receiving brush assembly 4 and the power receiving disc assembly 2 to always maintain a relatively stable contact state, the entire power receiving brush assembly 4 adopts a herringbone design, specifically as Figures 1 - 6 shown. Two groups of elastic brush units have the same structure and are symmetrically installed on both sides of the hoop copper clip 401. The elastic brush unit consists of a support foot 402, a tension spring 404, a carbon brush slider 405, and a copper strip 408. One end of the support foot 402 is hinged to the side of the hoop copper clip 401, and the inner side of the other end of the support foot 402 is hinged to the middle position of the top of the carbon brush slider 405. One end of the copper strip 408 is connected to the carbon brush slider 405. A pin shaft 403 is provided in the middle of the support foot 402. Both ends of the tension spring 404 are connected to the bottom of the hoop copper clip 401 and the pin shaft 403 respectively. The carbon brush slider 405 is in sliding fit with the power receiving copper ring 202, and the support foot 402 is hinged to the hoop copper clip 401, enabling the support foot 402 to flip on both sides of the hoop copper clip 401, thereby driving the carbon brush slider 405 to achieve displacement. And the carbon brush slider 405 and the support foot 402 are movably assembled by means of hinge, which is beneficial for the carbon brush slider 405 to adaptively adjust the angle under the dual action of the tension spring 404 and the power receiving copper ring 202 when the support foot 402 is at different flipping angles. At the same time, it also enables the carbon brush slider 405 or the power receiving copper ring 202 to have relatively stable power receiving contact conditions before being completely worn out. As a result, the entire conductive slip ring device can maintain a stable operation time for a longer time compared with the traditional disc-type power receiving slip ring, and its maintenance cycle is longer, thus achieving the purpose of reducing the equipment maintenance cost.
[0034] To ensure the stable installation of the power receiving brush assembly 4 and enable it to smoothly complete the conductive work, as Figure 6 shown, the other end of the copper strip 408 is fixed to the outside of the open end of the hoop copper clip 401 through a copper buckle 406 and a clamping bolt 407. The clamping bolt 407 horizontally penetrates the copper buckle 406 and the open end of the hoop copper clip 401. During the process of tightening the clamping bolt 407, while locking the copper strip 408 through the copper buckle 406, it also locks the open end of the hoop copper clip 401, enabling the hoop copper clip 401 and the insulating rod 5 to complete the hoop locking. Among them, the locking bolt for locking the copper strip 408 and the hoop copper clip 401 can serve as the connection terminal of the wire.
[0035] As Figures 1 - 3As shown, to ensure the safety of the conductive slip ring device during the overall operation, its fixed disk 201, base 205, and clamping disk 203 are all designed with fireproof and insulating integral forming. Moreover, the disk edges of the fixed disk 201 and the clamping disk 203 extend outward from both side edges of the current-receiving copper ring 202, and cooperate with the current-receiving copper ring 202 to form a chute for positioning the carbon brush slider 405.
[0036] Since the entire conductive slip ring device is in a relatively rotating state between the current-receiving disk assembly 2 and the current-receiving brush assembly 4 during operation, to prevent the rotation of the current-receiving copper ring 202 from affecting the current-receiving contact effect, as Figures 4 - 5 shown, limiting grooves 208 are provided on both opposite sides of the fixed disk 201 and the clamping disk 203. At positions corresponding to the limiting grooves 208 on both sides of the current-receiving copper ring 202, positioning blocks 207 that fit with the limiting grooves 208 are integrally formed. At the same time, on the inner side of the isolation ring 204, a limiting keyway 211 is provided along the length direction of the assembly shaft 1. At a position corresponding to the limiting keyway 211 on the surface of the hollow circular shaft 101 of the assembly shaft 1, a limiting strip 103 that cooperates with the limiting keyway 211 is provided.
[0037] To facilitate the insertion and installation of cable conductors, the assembly shaft 1 includes a hollow circular shaft 101. Through holes 102 are provided on the hollow circular shaft 101 at positions corresponding to each current-receiving disk assembly 2. At the same time, at positions corresponding to the through holes 102 on the isolation ring 204, avoidance notches 206 are provided. The end of the assembly shaft 1 is rotatably fitted with the bulkhead of the current-receiving chamber of the electric LHD and extends to the outside of the current-receiving chamber of the electric LHD.
[0038] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.
Claims
1. An electric LHD conductive slip ring device, comprising an assembly shaft (1), an insulating rod (5), a plurality of current receiving disc assemblies (2) are closely sleeved side by side on the assembly shaft (1), and a current receiving brush assembly (4) is fixed at a position corresponding to each current receiving disc assembly (2) on the insulating rod (5), characterized in that, The power receiving disc assembly (2) mainly consists of a fixed disc (201), a power receiving copper ring (202), and a clamping disc (203). Both the fixed disc (201) and the clamping disc (203) are designed as annular discs. In the middle of one side of the fixed disc (201), an isolation ring (204) is provided around the inner ring circumference. The clamping disc (203) is sleeved on the isolation ring (204) and fixed to the fixed disc (201) by screws, clamping the power receiving copper ring (202) between the fixed disc (201) and the clamping disc (203). On one side of the power receiving copper ring (202), there is a power connection post (209) passing through the fixed disc (201), and a power connection locking nut (210) is screwed on the power connection post (209). The power receiving brush assembly (4) includes a hoop copper clamp (401) and two groups of elastic brush units, and the elastic brush units are in sliding fit with the power receiving copper ring (202).
2. The electrically-driven scraper conductive slip ring device according to claim 1, characterized in that, The two groups of elastic brush units have the same structure and are symmetrically installed on both sides of the hoop copper clamp (401). The elastic brush unit consists of a support foot (402), a tension spring (404), a carbon brush slider (405), and a copper strip (408). One end of the support foot (402) is hinged to the side of the hoop copper clamp (401), and the inner side of the other end of the support foot (402) is hinged to the middle position of the top of the carbon brush slider (405). One end of the copper strip (408) is connected to the carbon brush slider (405). A pin shaft (403) is provided in the middle of the support foot (402). The two ends of the tension spring (404) are respectively connected to the bottom of the hoop copper clamp (401) and the pin shaft (403). The carbon brush slider (405) is in sliding fit with the power receiving copper ring (202).
3. The electrically driven LHD slip ring device according to claim 2, characterized in that, The other end of the copper strip (408) is fixed to the outside of the open end of the hoop copper clamp (401) through a copper buckle (406) and a clamping bolt (407). The clamping bolt (407) horizontally penetrates the copper buckle (406) and the open end of the hoop copper clamp (401). During the process of tightening the clamping bolt (407), while locking the copper strip (408) through the copper buckle (406), the open end of the hoop copper clamp (401) is also locked, enabling the hoop copper clamp (401) to complete the hoop locking with the insulating rod (5).
4. The electrically conductive slip ring device for an electric LHD vehicle according to claim 1, wherein, In the middle of the side of the fixed disc (201) where the isolation ring (204) is located, a circular base (205) for supporting the power receiving copper ring (202) is integrally formed. The fixed disc (201), the base (205), and the clamping disc (203) are all designed with fireproof insulation and integrally formed.
5. The electric LHD conductive slip ring device according to claim 1, characterized in that, Limit grooves (208) are provided on the opposite sides of the fixed disc (201) and the clamping disc (203). At the positions corresponding to the limit grooves (208) on both sides of the power receiving copper ring (202), positioning blocks (207) that fit the limit grooves (208) are integrally formed. A perforation (212) for the power connection post (209) to pass through is provided on the fixed disc (201).
6. The electrically-driven scraper conductive slip ring device according to claim 1, wherein, The assembly shaft (1) includes a hollow circular shaft (101), and wire passing holes (102) are formed in the hollow circular shaft (101) at positions corresponding to each current receiving disc assembly (2). Avoidance notches (206) are formed in the isolation ring (204) at positions corresponding to the wire passing holes (102).
7. The electrically-driven scraper conductive slip ring device according to claim 1, characterized in that, A limiting key groove (211) is formed in the inner side of the isolation ring (204) along the length direction of the assembly shaft (1), and a limiting strip (103) matched with the limiting key groove (211) is arranged on the surface of the hollow circular shaft (101) of the assembly shaft (1) at a position corresponding to the limiting key groove (211).
8. The electrically-driven LHD conductive slip ring device according to claim 1, characterized in that Brackets (6) are fixed to both ends of the insulating rod (5), and the brackets (6) are welded to the bulkhead of the current receiving chamber of the electric loader. A snap ring (3) for preventing the current receiving disc assembly (2) from falling off the assembly shaft (1) is clamped on the outer side of the front end of the assembly shaft (1), and the end of the assembly shaft (1) is rotatably matched with the bulkhead of the current receiving chamber of the electric loader and extends to the outside of the current receiving chamber of the electric loader.