A kind of handcart for middle cabinet

Abstract

The present invention discloses a central cabinet handcart, including a chassis car and a circuit breaker, wherein an insulating cylinder is provided on the circuit breaker, a metal contact arm is provided on the insulating cylinder, a contact arm head, a plum blossom contact, and a disassembly sleeve are provided on the metal contact arm, a contact arm inclined surface is provided on the contact arm head, the plum blossom contact sleeve is provided on the contact arm head, a sleeve inclined surface which is in the same direction as the contact arm inclined surface is provided on the disassembly sleeve, the plum blossom contact includes a plurality of contact pieces and a binding spring which is pressed against the sleeve and is arranged on the outside of the contact piece, a guide inclined surface which matches the sleeve inclined surface and the contact arm inclined surface is provided on one side of the contact piece, and after the contact arm inclined surface or the sleeve inclined surface outwardly contacts the guide inclined surface, the contact piece is opened outwardly so that the plum blossom contact can be installed on or removed from the contact arm head. The beneficial effect of the present invention is that the plum blossom contact on the contact arm head can be quickly installed and disassembled, the plum blossom contact is not easily damaged, and the safety and stability of the installation and disassembly process are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of trolleys, and in particular relates to a trolley for a central cabinet. Background Art

[0002] The full name of the center cabinet is armored removable center metal enclosed switchgear, which is mainly used for control and protection in industrial and commercial power systems. It has a three-layer structure, the upper layer is the busbar and instrument room, the middle layer is the circuit breaker room, and the lower layer is the cable room.

[0003] The circuit breaker room of the center cabinet needs to be installed with a center cabinet trolley before use. The trolley includes a chassis and a circuit breaker installed on the chassis. The trolley can be driven to slide into the center cabinet by rotating the rollers on the chassis. After that, the moving contact of the circuit breaker is electrically connected to the static contact inside the center cabinet, and the circuit breaker can be installed.

[0004] In order to form a stable contact surface between the moving contact and the static contact, reduce the contact resistance, and improve the conductive performance, most of the moving contacts of the circuit breakers are currently provided with plum blossom contacts that mesh with the static contacts. The plum blossom contacts include a number of contact pieces and a binding spring sleeved on the outside of the contact pieces. When installing and disassembling the plum blossom contacts, all the contact pieces need to be opened outwards. However, due to the limitation of the binding spring, the binding spring needs to be removed from the contact piece before opening the contact piece. After multiple installation and disassembly, the binding spring will cause certain damage, affecting the subsequent use, and the safety and stability during the disassembly process are relatively low. In addition, the existing center cabinet trolleys also have the problem that the circuit breaker and the chassis trolley lack auxiliary devices, and the two have low efficiency and poor stability when they are installed in coordination. Summary of the invention

[0005] The existing central cabinet has the following problems with its trolley: (1) the plum blossom contacts on the circuit breaker are not easy to install and remove; (2) the circuit breaker and the chassis lack auxiliary devices, making it inconvenient for the two to be installed in coordination with each other. In order to solve the problems of the trolley in the central cabinet, the following invention is proposed:

[0006] A central cabinet handcart comprises a chassis and a circuit breaker mounted on the top of the chassis, wherein the circuit breaker is provided with a plurality of insulating cylinders, a plurality of metal contact arms are provided on one side of the insulating cylinder, a contact arm head is provided on the end of the metal contact arm, a plum blossom contact is sleeved on the contact arm head, a contact arm inclined surface is provided on the contact arm head, a disassembly sleeve is sleeved on the metal contact arm, a sleeve inclined surface which is in the same direction as the contact arm inclined surface is provided on the disassembly sleeve, the plum blossom contact comprises a plurality of contact pieces and a binding spring which is pressed and sleeved on the outer side of the contact piece, a guide inclined surface which matches the sleeve inclined surface and the contact arm inclined surface is provided on one side of the contact piece, after the plum blossom contact moves toward the contact arm head, the contact arm inclined surface outwardly abuts against the guide inclined surface, so that the contact piece opens outward, so that the plum blossom contact is sleeved on the inner side of the contact arm head, the contact piece bites on the metal contact arm, and after the disassembly sleeve moves toward the contact piece, the sleeve inclined surface outwardly abuts against the guide inclined surface, so that the contact piece opens outward, and then the plum blossom contact can be directly removed from the contact arm head.

[0007] Furthermore, the metal contact arm is provided with a contact arm groove located between the contact arm head and the disassembly sleeve, and the contact piece is provided with a contact foot extending from one side of the guide slope, and the contact foot is engaged in the contact arm groove and abuts against the rear side of the contact arm head to improve the stability of the connection between the metal contact arm and the plum blossom contact.

[0008] Furthermore, it also includes a contact arm sleeve connected to the insulating tube and sleeved on the outside of the metal contact arm. A matching sleeve located on the outside of the contact arm sleeve is also sleeved on one side of the disassembly sleeve. The matching sleeve can fix the disassembly sleeve on the contact arm sleeve when it is not needed to prevent it from moving at will.

[0009] Furthermore, through pulling holes are provided on both sides of the matching sleeve, and pulling grooves are provided between the pulling holes. The pulling holes are convenient for operators to manually pull the matching sleeve, and the pulling grooves are convenient for operators to use tools to pull the matching sleeve.

[0010] Furthermore, the plum blossom contact shown also includes a plurality of positioning pieces, the positioning pieces are connected by positioning rods, and the contact piece is annularly clamped on the outside of the positioning piece.

[0011] Furthermore, the circuit breaker also includes a frame, with a positioning column on each side of the frame, a positioning plate on each side of the chassis, and a vertical guide groove on the positioning plate. After the positioning column is inserted into the guide groove, the frame can only move vertically upward relative to the chassis to achieve fixed cooperation between the frame and the chassis.

[0012] Furthermore, a positioning head is detachably mounted on the positioning column, and the positioning head is inserted into the guide groove, and a connector for detachably fixing the positioning plate and the chassis is provided between the positioning plate and the chassis. The detachable design facilitates the operator to remove the positioning head and the positioning plate from the chassis and the frame after completing the fixed fit between the chassis and the frame, so as to prevent affecting their normal installation in the central cabinet.

[0013] Furthermore, the positioning head is provided with a fixing hole, the positioning plate is provided with a penetrating positioning hole, and a positioning piece detachably fixedly connected to the fixing hole is provided in the positioning hole to prevent the frame from moving relative to the chassis vehicle.

[0014] The present invention proposes a central cabinet handcart, which has the following beneficial effects: (1) a disassembly sleeve is sleeved on the metal contact arm, a guide slope is provided on the plum blossom contact, and a sleeve slope and a contact arm slope that match the guide slope are respectively provided on the disassembly sleeve and the contact arm head. When the plum blossom contact is disassembled and installed, the upper guide slope is respectively resisted outward by the sleeve slope and the contact arm slope, so that the contact piece in the plum blossom contact moves outward, so that the plum blossom contact can be quickly disassembled from or installed on the metal contact arm, and the safety and stability during the installation and disassembly process are improved; (2) positioning structures are respectively added on both sides of the frame and the chassis vehicle to facilitate the combined installation of the two. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0016] Figure 2 For the present invention Figure 1 The enlarged structural diagram at A in the middle;

[0017] Figure 3 It is a schematic diagram of the three-dimensional structure of the contact arm sleeve and the plum blossom contact in the present invention;

[0018] Figure 4 It is a schematic diagram of the three-dimensional structure of the plum blossom contact in the present invention;

[0019] Figure 5 It is a schematic diagram of the three-dimensional structure of the contact sheet in the present invention;

[0020] Figure 6 For the present invention Figure 1 The enlarged structural diagram at B in the middle;

[0021] Figure 7 For the present invention Figure 6 Schematic diagram of the split structure of related components.

[0022] The corresponding relationship between the illustrations and component names in the figure is as follows:

[0023] 1. Circuit breaker; 2. Chassis; 3. Insulating cylinder; 4. Plum blossom contact; 5. Disassembly sleeve; 6. Positioning plate; 7. Positioning piece; 11. Frame; 12. Positioning column; 13. Positioning head; 21. Connector; 31. Contact arm sleeve; 32. Metal contact arm; 33. Contact arm head; 34. Contact arm inclined surface; 35. Contact arm groove; 41. Contact piece; 42. Binding spring; 43. Guide inclined surface; 44. Contact foot; 45. Positioning piece; 46. Positioning rod; 51. Sleeve inclined surface; 52. Matching sleeve; 53. Pull hole; 54. Pull groove; 61. Positioning hole; 62. Guide groove; 63. Fixing hole. DETAILED DESCRIPTION

[0024] The technical solution of the present invention will be clearly and completely described below in conjunction with embodiments.

[0025] Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making any creative work should fall within the scope of protection of this application.

[0026] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the present invention and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0027] In addition to being used to indicate a position or location relationship, some of the above terms may also be used to indicate other meanings. For example, the term "on" may also be used to indicate a certain dependency or connection relationship in some cases. For those skilled in the art, the specific meanings of these terms in the present invention can be understood according to specific circumstances.

[0028] like Figure 1-Figure 3 As shown, it is a preferred embodiment of the present invention, a central cabinet handcart, including a chassis 2 and a circuit breaker 1, the circuit breaker 1 includes a frame 11 and a plurality of insulating cylinders 3, the frame 11 is fixedly mounted on the top of the chassis 2, a plurality of horizontally extending metal contact arms 32 are provided on one side of the insulating cylinder 3, and a plurality of insulating cylinders 3 are sleeved on the outside of the metal contact arms 32, a plurality of metal contact arms 32 are provided on one side of the insulating cylinder 3, and a contact arm sleeve 31 fixedly connected to the insulating cylinder 3 is sleeved on the outside of each of the metal contact arms 32, and a contact arm head 33 and a plum blossom contact 4 sleeved on the outside of the contact arm head 33 are provided at the end of the metal contact arm 32.

[0029] like Figure 2 , Figure 4 , Figure 5 As shown, a contact arm inclined surface 34 extending outward is provided on the periphery of the contact arm head 33, a disassembly sleeve 5 located between the contact arm sleeve 31 and the contact arm head 33 is sleeved on the metal contact arm 32, a sleeve inclined surface 51 is provided on the periphery of the disassembly sleeve 5, and the sleeve inclined surface 51 is in the same direction as the contact arm inclined surface 34, the plum blossom contact 4 includes a plurality of contact pieces 41 arranged in a ring shape, an external card groove is provided on the outside of each contact piece 41, a binding spring 42 sleeved on the outside of the edge is pressed in the external card groove to fix the contact pieces 41 to each other, a guide inclined surface 43 is provided on the side of the contact piece 41 close to the contact arm head 33, and the extension direction of the guide inclined surface 43 is matched with the sleeve inclined surface 51 and the contact arm inclined surface 34.

[0030] When the plum blossom contact 4 needs to be installed on the contact arm head 33, the guide slope 43 on the contact piece 41 is directed toward the contact arm slope 34 of the contact arm head 33, and then moved until the guide slope 43 contacts the contact arm slope 34, and the plum blossom contact 4 is continued to be moved, and the contact arm slope 34 will press the outer side of the guide slope 43, and the contact piece 41 will open outward accordingly, and the binding spring 42 will also deform at the same time. After the contact piece 41 moves over the contact arm head 33, it shrinks inward and bites into the metal contact arm 32, completing the installation of the plum blossom contact 4; when the plum blossom contact 4 needs to be installed on the contact arm head 33, the contact piece 41 will be moved inward and bite into the metal contact arm 32, and the plum blossom contact 4 will be installed. When the plum blossom contact 4 is removed from the contact arm head 33, the disassembly sleeve 5 located at the rear side of the contact piece 41 is moved to contact it, and the sleeve inclined surface 51 on the disassembly sleeve 5 will also press outward as the disassembly sleeve 5 continues to move, and the contact piece 41 opens outward, and the binding spring 42 is also deformed at the same time. The plum blossom contact 4 is sleeved on the disassembly sleeve 5. When the disassembly sleeve 5 moves to contact the rear side of the contact arm head 33, the plum blossom contact 4 can be pulled from the disassembly sleeve 5 to the contact arm head 33. When the plum blossom contact 4 is separated from the contact arm head 33, its disassembly is completed immediately. The entire disassembly and installation process is relatively convenient and efficient. Since the disassembly process can be completed by moving the disassembly sleeve 5, the safety and stability of the disassembly process are also improved.

[0031] In this embodiment, the metal contact arm 32 is further provided with a contact arm slot 35 between the contact arm head 33 and the disassembly sleeve 5, and the contact piece 41 is provided with a contact foot 44 extending from one side of the guide slope 43. When the contact piece 41 is engaged with the metal contact arm 32, the contact foot 44 is engaged in the contact arm slot 35 and abuts against the rear side of the contact arm head 33. When the size of the disassembly sleeve 5 is set appropriately, the disassembly sleeve 5 will also abut against the rear side of the wire slope to improve the stability of fixing the contact piece 41. In order to increase the contact area between the contact piece 41 and the metal contact arm 32, when disassembling, after the contact piece 41 is opened outward, the contact foot 44 first detaches from the contact arm slot 35. Furthermore, a matching sleeve 52 is provided on one side of the disassembly sleeve 5 and is sleeved on the outside of the contact arm sleeve 31 to reduce the movement of the disassembly sleeve 5 when not in use. The matching sleeve 52 and the disassembly sleeve 5 are made of insulating material and will not affect the electrical connection of the metal contact arm 32. Furthermore, through pulling holes 53 are provided on both sides of the matching sleeve 52, and pulling grooves 54 are provided between the pulling holes 53. The pulling holes 53 are oblong, which is convenient for the operator to hold the pulling holes 53. When the clamping force provided by the binding spring 42 on the plum blossom contact 4 is large due to actual needs, the operator may not be able to manually move the disassembly sleeve 5. At this time, the disassembly sleeve 5 can be moved with a tool that can be fitted into the pulling groove 54.

[0032] like Figure 3-Figure 4 As shown, specifically, the plum blossom contact 4 also includes two front and rear positioning pieces 45, and the positioning pieces 45 are connected by positioning rods 46. An inner groove for the positioning piece 45 to be inserted is provided on the inner side of the contact piece 41, so that the contact piece 41 can be annularly engaged on the outer side of the positioning piece 45. The positioning piece 45 and the positioning rod 46 improve the overall fixation stability of the plum blossom contact 4.

[0033] like Figure 6-Figure 7 As shown, in the present embodiment, a positioning column 12 is provided on each side of the frame 11, and a positioning plate 6 is provided on the outer side of the positioning column 12. A positioning head 13 is detachably mounted on the positioning column 12, and the positioning plate 6 is detachably fixedly connected to the two sides of the chassis 2 through a connecting piece 21. A vertical guide groove 62 is provided on the positioning plate 6. When the frame 11 is installed on the chassis 2, the positioning heads 13 on both sides of the frame 11 are inserted into the guide groove 62 and moved vertically downward. When the positioning heads 13 are fully fitted into the guide groove 62, the frame 11 can only move vertically upward relative to the chassis 2 to reduce the movement of the frame 11 relative to the chassis 2 during the installation process. After all parts of the frame 11 are installed, the positioning plates 6 and the positioning heads 13 can be removed from the frame 11 without affecting the normal movement of the chassis 2.

[0034] Furthermore, a fixing hole 63 is provided at the center of the positioning head 13, a penetrating positioning hole 61 is provided on the positioning plate 6, and a positioning member 7 is provided in the positioning hole 61 and is detachably fixedly connected to the fixing hole 63 to completely prevent the frame 11 from moving relative to the chassis vehicle 2. Specifically, the detachable fixed connection in this embodiment is a threaded connection.

[0035] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A central cabinet handcart, comprising a chassis car (2) and a circuit breaker (1) mounted on the top of the chassis car (2), the circuit breaker (1) being provided with a plurality of insulating cylinders (3), a plurality of metal contact arms (32) being provided on one side of the insulating cylinder (3), a contact arm head (33) and a plum blossom contact (4) being provided at the end of the metal contact arm (32), characterized in that: The contact arm head (33) is provided with a contact arm inclined surface (34), the metal contact arm (32) is sleeved with a disassembly sleeve (5), the disassembly sleeve (5) is provided with a sleeve inclined surface (51) which is in the same direction as the contact arm inclined surface (34), the plum blossom contact (4) comprises a plurality of contact pieces (41) and a binding spring (42) which is sleeved and arranged outside the contact pieces (41) for pressing, and a spring which is in the same direction as the sleeve inclined surface (51) and the contact arm inclined surface (34) is provided on one side of the contact piece (41). The plum blossom contact (4) is provided with a guide inclined surface (43), after the plum blossom contact (4) moves toward the contact arm head (33), the contact arm inclined surface (34) outwardly abuts against the guide inclined surface (43), so that the contact piece (41) is opened outward, and when the contact piece (41) is engaged with the metal contact arm (32), after the disassembly sleeve (5) moves toward the contact piece (41), the sleeve inclined surface (51) outwardly abuts against the guide inclined surface (43), so that the contact piece (41) is opened outward; The metal contact arm (32) is also provided with a contact arm slot (35) located between the contact arm head (33) and the disassembly sleeve (5); the contact piece (41) is provided with a contact foot (44) extending from one side of the guide inclined surface (43); the contact foot (44) is engaged in the contact arm slot (35) and abuts against the rear side of the contact arm head (33).

2. The central cabinet handcart according to claim 1, characterized in that: It also includes a contact arm sleeve (31) connected to the insulating cylinder (3) and sleeved on the outside of the metal contact arm (32); and a matching sleeve (52) located on the outside of the contact arm sleeve (31) is sleeved on one side of the disassembly sleeve (5).

3. The central cabinet handcart according to claim 2, characterized in that: Through-going pulling holes (53) are provided on both sides of the matching sleeve (52), and pulling grooves (54) are provided between the pulling holes (53).

4. The central cabinet handcart according to claim 3, characterized in that: The plum blossom contact (4) further comprises a plurality of positioning pieces (45), wherein the positioning pieces (45) are connected to each other via positioning rods (46), and the contact piece (41) is annularly clamped on the outside of the positioning piece (45).

5. The central cabinet handcart according to claim 1, characterized in that: The circuit breaker (1) further comprises a frame (11), with a positioning column (12) being provided on both sides of the frame (11), a positioning plate (6) being provided on both sides of the chassis (2), and a vertical guide groove (62) being provided on the positioning plate (6), and after the positioning column (12) is inserted into the guide groove (62), the frame (11) can only move vertically upward relative to the chassis (2).

6. The central cabinet handcart according to claim 5, characterized in that: A positioning head (13) is detachably mounted on the positioning column (12), and the positioning head (13) is inserted into the guide groove (62) in a cooperative manner. A connecting piece (21) is provided between the positioning plate (6) and the chassis vehicle (2) for detachably and fixedly connecting the two.

7. The central cabinet handcart according to claim 6, characterized in that: The positioning head (13) is provided with a fixing hole (63), the positioning plate (6) is provided with a penetrating positioning hole (61), and a positioning member (7) is provided in the positioning hole (61) and is detachably fixedly connected to the fixing hole (63) to prevent the frame (11) from moving relative to the chassis vehicle (2).

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