Labor-saving mechanical structure for switch cabinet

Abstract

The utility model discloses a switch cabinet laborsaving mechanical structure, the switch cabinet laborsaving mechanical structure comprises a support frame, the support frame is provided with an operation shaft, a threaded push rod, a passive rotating shaft assembly, a driving rotating shaft assembly and a transmission shaft, the operation shaft is provided with an upper crank arm, two sides of the threaded push rod are provided with connecting pieces, and the transmission shaft is provided with a lower crank arm. The upper crank arm is hinged to the connecting piece, and the driven rotating shaft assembly is arranged on the threaded ejector rod in a sleeving mode, meshed with the threaded ejector rod and used for enabling the threaded ejector rod to move up and down so as to drive the operation shaft to rotate and move. The rotating speed of the transmission shaft rotating at a high speed is reduced through mutual matching of gears, so that the driving rotating shaft assembly outputs low-speed and high-torque power, the driven rotating shaft assembly obtains high torque, the threaded ejector rod is driven to move up and down, and the operating shaft is rotated to rotate; and the product has the advantages of labor saving, improved operation stability, reliable movement and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of five-protection interlocking of high-voltage electrical equipment, in particular to a labor-saving mechanical structure for a switch cabinet. Background Art

[0002] In the power system, switchgear is widely used as an electric energy distribution device. The main function of the switchgear is to open and close, control and protect the electrical equipment in the process of power generation, transmission, distribution and power conversion in the power system. The components in the switchgear mainly include circuit breakers, disconnectors, load switches, operating mechanisms, mutual inductors and various protection devices.

[0003] The grounding switch interlock in the switch cabinet is an important component of the switch cabinet. The existing switch cabinet must meet the requirement of closing the rear door before operating the grounding switch to prevent the operator from mistakenly entering the energized interval. The existing grounding switch operation is divided into two modes: manual operation and electric operation. The grounding switch is usually equipped with an energy storage spring. The stronger the energy storage spring, the faster the speed of closing and opening the switch, the less damage to the electrode contacts, and the longer the service life of the electrode contacts. However, the stronger the energy storage spring, the greater the rotational torque of the main shaft. Therefore, when the rotational torque is too large, the operator will feel very strenuous, and the motor drive resistance is too large, causing the motor to heat up and then damage the internal coils, windings, insulation and other components, thereby reducing the speed of opening and closing. At the same time, it also increases the difficulty of equipment maintenance. Therefore, the applicant has made a beneficial design and found a solution to the above problems. The technical solution to be introduced below was produced in this context. Summary of the invention

[0004] The purpose of the utility model is to overcome the shortcomings of the above-mentioned background technology design and provide a product that saves labor, improves operational stability and has reliable movement.

[0005] To solve the above problems, the utility model adopts the following technical solutions.

[0006] A labor-saving mechanical structure for a switch cabinet, comprising a support frame, the support frame is provided with an operating shaft, a threaded push rod, a passive rotating shaft assembly, an active rotating shaft assembly, and a transmission shaft, the operating shaft is provided with an upper turning arm, both sides of the threaded push rod are provided with connecting pieces, the upper turning arm is hinged to the connecting piece, the passive rotating shaft assembly is sleeved on the threaded push rod and meshes with the threaded push rod, so as to make the threaded push rod move up and down, thereby driving the operating shaft to rotate;

[0007] The active rotating shaft assembly engages with the passive rotating shaft assembly to rotate the passive rotating shaft assembly;

[0008] The transmission shaft engages with the active shaft assembly to provide rotational power for the active shaft assembly.

[0009] Preferably, the support frame is provided with a first partition plate and a second partition plate, the first partition plate and the second partition plate are provided with a first movable through hole and a second movable through hole, and the support frame is provided with a protective cover.

[0010] Preferably, the threaded push rod is provided with a hinged through hole, the connecting piece is provided with a hinged hole, and the threaded push rod is arranged in the first movable through hole.

[0011] Preferably, limiting through holes are provided on both sides of the support frame, the limiting through holes are provided with fixed shafts which pass through the hinge through holes and the hinge holes, retaining rings are provided on both sides of the fixed shafts which abut against the outer walls of the limiting through holes.

[0012] Preferably, the passive rotating shaft assembly includes a passive gear, a sleeve, and a bearing sleeve. The sleeve is arranged in the first movable through hole. The inner wall of the sleeve is provided with an internal thread groove, and is engaged with the external thread groove of the threaded push rod. The passive gear is fixed on the outer wall of the sleeve. The bearing sleeve abuts against both ends of the passive gear and abuts against the first partition plate and the second partition plate.

[0013] Preferably, the bearing sleeve comprises an outer ring base, an inner ring base and balls, a plurality of the balls are arranged between the outer ring base and the inner ring base, the outer ring base abuts against the first partition plate and the second partition plate, and the inner ring base abuts against both ends of the passive gear.

[0014] Preferably, the active rotating shaft assembly includes an operating rod, a first bevel gear, and a driving gear. The two ends of the operating rod respectively abut the first partition plate and the second partition plate. The two ends of the operating rod are provided with a cylinder and pass through the second movable through hole. The first bevel gear is fixed on the cylinder and abuts the top of the second partition plate. The driving gear is sleeved on the operating rod and meshes with the driven gear. The shape of the operating rod is set to be hexagonal.

[0015] Preferably, the transmission shaft is provided with a second bevel gear and meshes with the first bevel gear, and the shape of the transmission shaft is set to be hexagonal.

[0016] Beneficial effects:

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] The utility model reduces the rotation speed of the high-speed rotating transmission shaft through the mutual cooperation between the first bevel gear and the second bevel gear, so that the operating rod outputs low-speed and high-torque power, thereby reducing the torque to be applied by personnel or motors, and due to the special shape of the bevel gears, the second bevel gear has a larger contact area when meshing with the first bevel gear, so that it can withstand a larger torque. The tooth surfaces of the first bevel gear and the second bevel gear also have a self-lubricating function, which can reduce tooth surface wear, extend service life, and reduce maintenance workload. The problem of high-torque transmission attenuation of the active gear is reduced by the bearing sleeve, and the operating rod outputs high-torque power, so that the active gear drives the passive gear and the sleeve to rotate, and the internal thread groove rotates so that the threaded push rod can move up and down, and the contact area with the threaded push rod is increased by multiple internal thread grooves, thereby preventing the thread push rod from slipping, so that the product has the advantages of saving labor, improving operational stability, and reliable movement. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of a labor-saving mechanical structure for a switch cabinet according to the utility model;

[0020] Figure 2 This is a schematic diagram of the internal structure of a labor-saving mechanical structure for a switch cabinet of the utility model;

[0021] Figure 3 The utility model is a kind of explosion-proof mechanical structure for switch cabinet Figure 1 ;

[0022] Figure 4 The utility model is a kind of explosion-proof mechanical structure for switch cabinet Figure 2 ;

[0023] Figure 5 The utility model is a switch cabinet grounding interlocking device with a labor-saving mechanical structure for a switch cabinet;

[0024] The corresponding relationship between the illustrations and component names in the figure is as follows:

[0025] Reference numerals: 1, support frame; 2, operating shaft; 3, threaded push rod; 4, passive shaft assembly; 5, active shaft assembly; 6, transmission shaft; 7, side plate; 8, grounding switch;

[0026] 11. First baffle; 12. Second baffle; 13. First movable through hole; 14. Second movable through hole; 15. Protective cover; 16. Limiting through hole; 17. Fixed shaft; 18. Snap ring;

[0027] 21. Upper crutch arm;

[0028] 31. Connecting piece; 32. Articulated through hole;

[0029] 311, hinge hole;

[0030] 41. Passive gear; 42. Sleeve; 43. Bearing sleeve;

[0031] 421, internal thread groove;

[0032] 431, outer ring base; 432, inner ring base; 433, ball;

[0033] 51. operating lever; 52. first bevel gear; 53. driving gear;

[0034] 511, cylinder;

[0035] 61. Second bevel gear;

[0036] 71, first shaft; 72, first sleeve shaft; 73, first transmission plate; 74, third sleeve shaft; 75, second shaft; 76, second sleeve shaft; 77, second transmission plate; 78, fourth sleeve shaft;

[0037] 81. Grounding knife. DETAILED DESCRIPTION

[0038] The technical solution of the utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0039] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by the terms "up", "down", "left" and "right" are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0040] Reference example Figures 1 to 5 A labor-saving mechanical structure for a switch cabinet includes a support frame 1, the support frame 1 is provided with an operating shaft 2, a threaded push rod 3, a passive shaft assembly 4, an active shaft assembly 5, and a transmission shaft 6, the operating shaft 2 is provided with an upper crank arm 21, and connecting pieces 31 are provided on both sides of the threaded push rod 3, the upper crank arm 21 is hinged to the connecting piece 31, the passive shaft assembly 4 is sleeved on the threaded push rod 3, and engages with the threaded push rod 3, so as to make the threaded push rod 3 move up and down, thereby driving the operating shaft 2 to rotate; the active shaft assembly 5 engages with the passive shaft assembly 4, so as to make the passive shaft assembly 4 rotate; the transmission shaft 6 engages with the active shaft assembly 5, so as to provide rotational power for the active shaft assembly 5;

[0041] It is worth mentioning that the support frame 1 is provided with a first partition 11 and a second partition 12, and the first partition 11 and the second partition 12 are provided with a first movable through hole 13 and a second movable through hole 14, and the support frame 1 is provided with a protective cover 15. The first partition 11 and the second partition 12 provide support for the active shaft assembly 5 and the passive shaft assembly 4, the first movable through hole 13 is used in conjunction with the sleeve 42 and the threaded top rod 3, and the second movable through hole 14 is used in conjunction with the operating rod 51, and the protective cover 15 prevents personnel from accidentally touching the gears to cause injuries, and prevents the fallen screws and cables in the switch cabinet from touching the gears to cause jamming;

[0042] It is worth mentioning that the threaded push rod 3 is provided with a hinged through hole 32, the connecting piece 31 is provided with a hinged hole 311, the threaded push rod 3 is arranged in the first movable through hole 13, and the hinged through hole 32 and the hinged hole 311 are used in conjunction with the fixed shaft 17;

[0043] It is worth mentioning that the support frame 1 is provided with a limit through hole 16 on both sides, the limit through hole 16 is provided with a fixed shaft 17, and passes through the hinge through hole 32 and the hinge hole 311, and the fixed shaft 17 is provided with a retaining ring 18 on both sides, and abuts against the outer wall of the limit through hole 16, the limit through hole 16 limits the rising and falling distance of the threaded push rod 3, and also limits the rotation angle of the operating shaft 2, the fixed shaft 17 makes the connecting member 31 hinged to the threaded push rod 3, and the retaining ring 18 prevents the fixed shaft 17 from falling off from the limit through hole 16;

[0044] It is worth mentioning that the passive shaft assembly 4 includes a passive gear 41, a sleeve 42, and a bearing sleeve 43. The sleeve 42 is arranged in the first movable through hole 13. The inner wall of the sleeve 42 is provided with an internal thread groove 421, which meshes with the external thread groove of the threaded push rod 3. The passive gear 41 is fixed to the outer wall of the sleeve 42. The bearing sleeve 43 abuts against both ends of the passive gear 41 and abuts against the first partition plate 11 and the second partition plate 12. The internal thread groove 421 increases the contact area with the external thread groove of the threaded push rod 3 to prevent the threaded push rod 3 from slipping and retreating during the rising process. The passive gear 41 is used in conjunction with the active gear 53, and the bearing sleeve 43 reduces the problem of high torque transmission attenuation of the active gear 53.

[0045] It is worth mentioning that the bearing sleeve 43 includes an outer ring base 431, an inner ring base 432, and balls 433. A plurality of balls 433 are arranged between the outer ring base 431 and the inner ring base 432. The outer ring base 431 abuts against the first baffle 11 and the second baffle 12, and the inner ring base 432 abuts against the two ends of the passive gear 41. The outer ring base 431 basically does not rotate. When the passive gear 41 rotates, the inner ring base 432 rotates with the passive gear 41, thereby causing the balls 433 to roll together. The balls 433 reduce the friction of the rotation of the passive gear 41, thereby reducing the problem of torque attenuation.

[0046] It is worth mentioning that the active shaft assembly 5 includes an operating rod 51, a first bevel gear 52, and a driving gear 53. The two ends of the operating rod 51 abut against the first partition plate 11 and the second partition plate 12 respectively. The two ends of the operating rod 51 are provided with a cylinder 511 and pass through the second movable through hole 14. The first bevel gear 52 is fixed on the cylinder 511 and abuts against the top of the second partition plate 12. The driving gear 53 is sleeved on the operating rod 51 and meshes with the driven gear 41. The shape of the operating rod 51 is set to be hexagonal, and the cylinder 511 rotates with the second movable through hole 14 as the axis. The shape of the operating rod 51 is set to be hexagonal, which is to increase the contact area with the driving gear 53 and ensure that the high torque of the first bevel gear 52 is evenly transmitted to the driving gear 53.

[0047] It is worth mentioning that the transmission shaft 6 is provided with a second bevel gear 61 and meshes with the first bevel gear 52. The shape of the transmission shaft 6 is set to be hexagonal. The transmission shaft 6 provides power for the second bevel gear 61. The shape of the transmission shaft 6 is set to be hexagonal to increase the contact area with the second gear and ensure that the torque of the transmission shaft 6 is evenly transmitted to the second bevel gear 61.

[0048] The use principle of the utility model is now described as follows:

[0049] The product is mounted and fixed on the side plate 7 of the switch cabinet, the operating shaft 2 is connected and fixed to the first shaft rod 71 of the switch cabinet, and the operating handle is inserted into the transmission shaft 6 or the shaft of the motor is connected and fixed to the transmission shaft 6 to provide power for the rotation of the transmission shaft 6. As the transmission shaft 6 rotates, the second bevel gear 61 is driven to rotate, and then the first bevel gear 52 is driven to rotate. The second bevel gear 61 engages with the first bevel gear 52 to reduce the speed of the high-speed rotating transmission shaft 6, so that the operating rod 51 outputs low-speed and high-torque power. As the operating rod 51 rotates, the active gear 53 is driven to rotate, and then the passive gear 41 and the sleeve 42 are rotated. The sleeve 42 rotates to make the threaded push rod 3 move downward, and the fixed shaft 17 moves to the other end of the limit through hole 16 The force of the threaded push rod 3 is transmitted to the upper crank arm 21 through the connecting piece 31, so that the operating shaft 2 rotates counterclockwise, and then the first shaft rod 71 rotates, and the first sleeve shaft 72 sleeved on the first shaft rod 71 drives the first transmission plate 73 hinged on the first sleeve shaft 72 to move upward, so that the second shaft rod 75 hinged on the third sleeve shaft 74 at the other end of the first transmission plate 73 rotates, and drives the second sleeve shaft 76 sleeved on the second shaft rod 75 to move, so that the second transmission plate 77 hinged on the second sleeve shaft 76 moves downward, and the downward force rotates through the fourth sleeve shaft 78 hinged on the other end of the second transmission plate 77, and the fourth sleeve shaft 78 is sleeved on the grounding knife 81 of the grounding switch 8, and the closing action is completed through the above steps.

[0050] The above design scheme can enable the product to achieve the advantages of labor saving, improved operational stability, reliable movement, etc.

[0051] The above content is a further detailed description of the utility model in combination with specific implementation methods. It cannot be determined that the specific implementation of the utility model is limited to these descriptions. For ordinary technicians in the technical field to which the utility model belongs, without departing from the concept of the utility model, they can also make several simple deductions or substitutions, which should be regarded as belonging to the scope of protection determined by the claims submitted for the utility model.

Claims

1. A labor-saving mechanical structure for a switch cabinet, comprising a support frame (1), wherein the support frame (1) is provided with an operating shaft (2), a threaded push rod (3), a passive rotating shaft assembly (4), an active rotating shaft assembly (5), and a transmission shaft (6), characterized in that: The operating shaft (2) is provided with an upper crank arm (21), and connecting pieces (31) are provided on both sides of the threaded push rod (3), the upper crank arm (21) is hinged to the connecting piece (31), and the passive shaft assembly (4) is sleeved on the threaded push rod (3) and engages with the threaded push rod (3) to enable the threaded push rod (3) to move up and down, thereby driving the operating shaft (2) to rotate; The active rotating shaft assembly (5) engages with the passive rotating shaft assembly (4) to cause the passive rotating shaft assembly (4) to rotate; The transmission shaft (6) engages with the active rotating shaft assembly (5) to provide rotational power for the active rotating shaft assembly (5).

2. The labor-saving mechanical structure for a switch cabinet according to claim 1, characterized in that: The support frame (1) is provided with a first partition plate (11) and a second partition plate (12); the first partition plate (11) and the second partition plate (12) are provided with a first movable through hole (13) and a second movable through hole (14); and the support frame (1) is provided with a protective cover (15).

3. The labor-saving mechanical structure for a switch cabinet according to claim 2, characterized in that: The threaded push rod (3) is provided with a hinged through hole (32), the connecting piece (31) is provided with a hinged hole (311), and the threaded push rod (3) is arranged in the first movable through hole (13).

4. The labor-saving mechanical structure for a switch cabinet according to claim 3 is characterized in that: The support frame (1) is provided with limiting through holes (16) on both sides, the limiting through holes (16) are provided with fixed shafts (17) and pass through the hinge through holes (32) and the hinge holes (311), and retaining rings (18) are provided on both sides of the fixed shaft (17) and abut against the outer wall of the limiting through holes (16).

5. The labor-saving mechanical structure for a switch cabinet according to claim 4, characterized in that: The passive rotating shaft assembly (4) comprises a passive gear (41), a sleeve (42), and a bearing sleeve (43); the sleeve (42) is arranged in the first movable through hole (13); the inner wall of the sleeve (42) is provided with an internal thread groove (421) which meshes with the external thread groove of the threaded push rod (3); the passive gear (41) is fixed on the outer wall of the sleeve (42); the bearing sleeve (43) abuts against two ends of the passive gear (41) and abuts against the first partition plate (11) and the second partition plate (12).

6. The labor-saving mechanical structure for a switch cabinet according to claim 5, characterized in that: The bearing sleeve (43) includes an outer ring base (431), an inner ring base (432), and balls (433). A plurality of balls (433) are arranged between the outer ring base (431) and the inner ring base (432). The outer ring base (431) abuts against the first baffle (11) and the second baffle (12), and the inner ring base (432) abuts against both ends of the driven gear (41).

7. The labor-saving mechanical structure for a switch cabinet according to claim 6, characterized in that: The active shaft assembly (5) comprises an operating rod (51), a first bevel gear (52), and a driving gear (53). The two ends of the operating rod (51) respectively abut against the first partition plate (11) and the second partition plate (12). The two ends of the operating rod (51) are provided with cylinders (511) passing through the second movable through hole (14). The first bevel gear (52) is fixed on the cylinder (511) and abuts against the top of the second partition plate (12). The driving gear (53) is sleeved on the operating rod (51) and meshes with the driven gear (41). The shape of the operating rod (51) is set to be hexagonal.

8. The labor-saving mechanical structure for a switch cabinet according to claim 7, characterized in that: The transmission shaft (6) is provided with a second bevel gear (61) which meshes with the first bevel gear (52); the shape of the transmission shaft (6) is set to be hexagonal.

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