Hand-cranking propelling mechanism and separated plugging unit

Abstract

The utility model relates to the technical field of switch cabinets, in particular to a hand-cranking propelling mechanism and a separated plug unit, the hand-cranking propelling mechanism comprises a propelling screw rod, a screw rod mounting bracket and an elastic positioning device, the propelling screw rod is rotatably mounted on the screw rod mounting bracket, the elastic positioning device is mounted on the screw rod mounting bracket, and the screw rod mounting bracket is rotatably mounted on the screw rod mounting bracket. The pushing lead screw is provided with a positioning groove, the elastic positioning device is provided with a positioning piece which is elastically pushed out, and when the pushing lead screw rotates to the initial matching angle, the positioning piece is clamped into the positioning groove to position the pushing lead screw. The separated type plugging unit comprises the hand-cranking propelling mechanism, and the hand-cranking propelling mechanism is installed on the unit bottom plate and used for hand-cranking propelling of the unit. The hand-cranking propelling mechanism has the advantages that the hand-cranking propelling mechanism cannot be damaged due to misoperation, the structure is simplified, the function reaches the standard, application and operation are more convenient and faster, and cost is reduced; and meanwhile, positioning hand feeling force and sound prompts can be generated after pushing in place, so that misoperation is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of switch cabinets, in particular to a hand-cranked propulsion mechanism and a separated plug-in unit. Background Art

[0002] A large number of hand-cranked propulsion mechanisms are used in drawer units of low-voltage switchgear, such as the hand-cranked propulsion mechanism of the applicant's patent number ZL200820186443.4, which displays the position and positions the propulsion screw through a gear positioning mechanism driven by a propulsion screw.

[0003] The hand-cranked propulsion mechanism with a gear positioning mechanism has a problem that the propulsion screw is rotated away from the starting matching angle when operated by human error, resulting in the unit not being pushed into place.

[0004] The reason for the above problem is that the existing hand-cranked propulsion mechanism uses the gear positioning mechanism driven by the propulsion screw to display the position and position the propulsion screw. If the operator is not professional and does not confirm that the gear positioning mechanism displays "separated" when the unit enters the unit room, the propulsion screw has rotated a certain angle, the gear positioning mechanism has passed the separation display position, and the propulsion stroke of the hand-cranked propulsion mechanism has been reduced. When the hand-cranked propulsion mechanism is cranked to display "connected", the unit is not actually pushed to the connection position, and the unit position display is incorrect.

[0005] If the manual propulsion mechanism is still forcibly operated manually, any gear in the gear positioning mechanism may break because the gears in the gear positioning mechanism have rotation angle limits.

[0006] At present, a large number of separate plug-in units use plug-in circuit breakers with base connection structures. The outgoing line end of the base is fixedly connected to the vertical busbar through holes. There is a movable plug on the back of the plug-in circuit breaker to connect with the spring plug in the base to realize the unit incoming line electrical connection structure.

[0007] Since the plug-in circuit breaker is manually inserted and unplugged when connected to the base, the 630A and 400A plug-in circuit breakers are very difficult to insert and unplug manually due to the high pressure of the plug. The replacement of the base failure requires power outage for maintenance. In addition, the connection structure is costly and the process is complicated. Therefore, the applicant proposed a main circuit connection structure that uses a main circuit connector to connect a fixed circuit breaker in Chinese patent application 2023211489923, which can enable the separated plug-in unit to be repaired without power outage.

[0008] The separate plug-in unit of the main circuit connection structure of the fixed circuit breaker connected by the main circuit connector only needs to perform two-position plug-in and pull-out operations of the connection position and the separation position. Only a simple hand-cranked propulsion mechanism is required, and the two-position plug-in and pull-out operations of the connection position and the separation plug-in unit can meet the standards. Utility Model Content

[0009] The technical problem to be solved by the utility model is that the existing hand-cranked propulsion mechanism has the problem that the propulsion screw is rotated away from the starting matching angle when operated by human error, resulting in the problem that the unit cannot be propulsed into place and may cause component damage.

[0010] The technical solution adopted by the utility model to solve its technical problems is: a hand-cranked propulsion mechanism, including a propulsion screw, a screw mounting bracket and an elastic positioning device, the propulsion screw can be rotatably mounted on the screw mounting bracket, the elastic positioning device is mounted on the screw mounting bracket, the propulsion screw is provided with a positioning groove, and the elastic positioning device has an elastically pushed-out positioning piece, which is inserted into the positioning groove when the propulsion screw is rotated to a starting matching angle to position the propulsion screw.

[0011] In some embodiments, optionally, the elastic positioning device includes a positioning base, an elastic member and a positioning member, the positioning member can be telescopically inserted into the positioning base, the elastic member is installed in the positioning base to elastically push out the positioning member, and the elastic positioning device is installed on the screw mounting bracket through the positioning base.

[0012] In some embodiments, optionally, the positioning groove is located at the front end of the push screw, and the elastic positioning device is located above the front end of the push screw.

[0013] In some embodiments, optionally, the advancement screw includes a spiral portion and a front end shaft and a rear end shaft at both ends of the spiral portion, and the advancement screw is rotatably mounted on the screw mounting bracket through the front end shaft and the rear end shaft, an operating sleeve is sleeved on the front end shaft, and a positioning groove is located on the operating sleeve.

[0014] In some embodiments, optionally, the screw mounting bracket includes a front bracket, a rear bracket and a cover plate, the front bracket and the rear bracket are respectively located on the front and rear sides of the propulsion screw, the cover plate is located above the propulsion screw, the front bracket and the rear bracket are connected together through the cover plate, the front part of the cover plate has an extending end, and the elastic positioning device is installed on the extending end.

[0015] In some embodiments, optionally, the advancement screw includes a spiral portion and a front end shaft and a rear end shaft at both ends of the spiral portion, the screw mounting bracket includes a front bracket and a rear bracket, the front bracket and the rear bracket are respectively located on the front and rear sides of the advancement screw, and the specific structure of the advancement screw rotatably mounted on the screw mounting bracket is: the front end shaft of the advancement screw passes through the axial hole of the front bracket, and the rear end shaft of the advancement screw passes through the axial hole of the rear bracket; the screw mounting bracket also includes an auxiliary support bracket, the auxiliary support bracket is arranged behind the rear bracket, the rear end axis of the advancement screw extends to the auxiliary support bracket and passes through the axial hole of the auxiliary support bracket, and the axial hole of the rear bracket and the axial hole of the auxiliary support bracket are spaced from each other.

[0016] A partitioned plug-in unit comprises the above-mentioned manual propulsion mechanism, which is mounted on a unit bottom plate and is used for manual propulsion of the unit.

[0017] The beneficial effects of the utility model are: the hand-cranked propulsion mechanism will not be damaged due to misoperation, and the structure is simplified, the functions meet the standards, the application operation is more convenient and faster, and the cost is reduced;

[0018] At the same time, the propulsion screw of the hand-cranked propulsion mechanism can be correctly positioned at the starting matching angle through the positioning groove, so that the propulsion screw and the groove-shaped positioning piece can be misaligned. Every time the propulsion screw is shaken once, it will be elastically positioned by the elastic positioning device and produce a certain positioning hand feeling force. At the same time, a click sound prompt is generated, so that the operator can clearly feel that the hand-cranked propulsion mechanism is positioned and determine the number of hand-cranking circles, thereby avoiding misoperation.

[0019] Even if the positioning grooves of the positioning piece and the push screw are not in the positioning state at the beginning, the unit will not move when the hand-cranked push mechanism is shaken. When the positioning piece enters the positioning groove, the push screw rotates to the starting matching angle, and the matching groove structure of the push screw 1 and the groove-shaped positioning piece begins to enter the matching state. Then the unit starts to move when the push screw is shaken, and the push stroke will not change. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The utility model is further described below in conjunction with the accompanying drawings and embodiments;

[0021] Figure 1 It is a front three-dimensional structural schematic diagram of the hand-cranked propulsion mechanism of the utility model;

[0022] Figure 2 It is a back three-dimensional structural schematic diagram of the hand-cranked propulsion mechanism of the utility model;

[0023] Figure 3 It is a front three-dimensional structural schematic diagram of the groove-shaped positioning member of the utility model;

[0024] Figure 4 It is a schematic diagram of the structure of the hand-cranked propulsion mechanism of the utility model from a top view;

[0025] Figure 5 yes Figure 4 AA section view;

[0026] Figure 6 yes Figure 5 A schematic diagram of the structure in which the positioning member is separated from the positioning groove;

[0027] Figure 7 It is a structural schematic diagram of the hand-cranked propulsion mechanism assembly of the utility model from a front view when it is in a separated position;

[0028] Figure 8 yes Figure 7 A schematic diagram of the structure from a side perspective;

[0029] Fig. 9 It is a structural schematic diagram of the hand-cranked propulsion mechanism assembly of the utility model when it is in a connected position from a side view;

[0030] Fig.10 yes Fig. 9 A schematic diagram of the rear view perspective structure;

[0031] Fig.11 It is a structural schematic diagram of the separated plug-in unit of the utility model;

[0032] Fig.12 It is a structural schematic diagram of the separated plug-in unit (with the front baffle hidden) of the utility model in the closed interlocking state;

[0033] Fig.13 It is a structural schematic diagram of a unit room of the utility model;

[0034] Fig.14 It is a structural schematic diagram of the separated plug-in unit assembly of the utility model;

[0035] Fig.15 It is a structural schematic diagram of the separated plug-in unit assembly of the utility model with a padlock added in the separated position;

[0036] In the figure, 1. push screw, 1-1. rear end shaft, 2-1. front bracket, 2-2. rear bracket, 2-3. auxiliary support bracket, 2-4. cover plate, 3-1. positioning base, 3-2. elastic member, 3-3. positioning member, 4. unit chamber, 4-1. unit chamber layer plate, 5. positioning groove, 6. separated plug-in unit, 6-1. unit bottom plate, 7. groove-shaped positioning member, 7-1. matching groove structure, 7-2. limiting boss, 8. operating sleeve, 9-1. closing interlock rod, 9-2. closing interlock plate, 10. unit door, 11. maintenance padlock hole in separation position, 12. padlock. DETAILED DESCRIPTION

[0037] like Figures 1 to 10 As shown, a hand-cranked propulsion mechanism assembly includes a hand-cranked propulsion mechanism and a groove-shaped positioning member 7.

[0038] The hand-cranked propulsion mechanism includes a propulsion screw 1, a screw mounting bracket and an elastic positioning device. The hand-cranked propulsion mechanism is installed in the unit through the screw mounting bracket. The propulsion screw 1 is rotatably mounted on the screw mounting bracket. The elastic positioning device is mounted on the screw mounting bracket. The propulsion screw 1 is provided with a positioning groove 5. The elastic positioning device has an elastically pushed-out positioning piece 3-3. When the propulsion screw 1 is rotated to the starting matching angle, it is inserted into the positioning groove 5 to position the propulsion screw 1.

[0039] The specific structure of the elastic positioning device is: it includes a positioning base 3-1, an elastic member 3-2 and a positioning member 3-3. The positioning member 3-3 can be telescopically inserted into the positioning base 3-1. The elastic member 3-2 is installed in the positioning base 3-1 and elastically pushes out the positioning member 3-3. The elastic positioning device is installed on the screw mounting bracket through the positioning base 3-1.

[0040] The positioning groove 5 is located at the front end of the advancing screw rod 1 , and the elastic positioning device is located above the front end of the advancing screw rod 1 .

[0041] More specifically, the advancement screw 1 includes a spiral portion and a front end shaft and a rear end shaft 1-1 at both ends of the spiral portion. The advancement screw 1 is rotatably mounted on a screw mounting bracket through the front end shaft and the rear end shaft 1-1. An operating sleeve 8 is sleeved on the front end shaft, and the positioning groove 5 is located on the operating sleeve 8. The head end of the operating sleeve 8 has an operating hole for cooperating with a hand crank handle for hand cranking operation.

[0042] The groove-shaped positioning member 7 is installed on the unit chamber 4 , and the groove-shaped positioning member 7 has a matching groove structure 7 - 1 that cooperates with the propulsion screw rod 1 to produce a propulsion effect.

[0043] like Fig. 9 and 10 As shown, the rear end of the matching groove structure 7-1 has a limiting boss 7-2, and the limiting boss 7-2 cooperates with the rear end of the spiral of the spiral part of the propulsion screw 1. When the hand-cranked propulsion mechanism assembly is shaken into the connection position, the rear end of the spiral of the spiral part of the propulsion screw 1 presses against the limiting boss 7-2 at the rear end of the matching groove structure 7-1, limiting the propulsion screw 1 and preventing the propulsion screw 1 from continuing to shake.

[0044] The screw mounting bracket includes a front bracket 2-1 and a rear bracket 2-2, and the front bracket 2-1 and the rear bracket 2-2 are respectively located on the front and rear sides of the propulsion screw 1. The specific structure of the propulsion screw 1 rotatably mounted on the screw mounting bracket is: the front end shaft of the propulsion screw 1 passes through the axial hole of the front bracket 2-1, and the front end shaft of the propulsion screw 1 passes through the axial hole of the rear bracket 2-2.

[0045] like Figure 2 As shown, the screw mounting bracket also includes an auxiliary support bracket 2-3, which is arranged behind the rear bracket 2-2. The rear end shaft 1-1 of the push screw 1 extends toward the auxiliary support bracket 2-3 and passes through the axial hole of the auxiliary support bracket 2-3. The axial hole of the rear bracket 2-2 and the axial hole of the auxiliary support bracket 2-3 are spaced apart from each other.

[0046] The screw rod mounting bracket also includes a cover plate 2-4, which is located above the advancing screw rod 1. The front bracket 2-1 and the rear bracket 2-2 are connected together through the cover plate 2-4, and the auxiliary support bracket 2-3 is fixed on the rear bracket 2-2. The front part of the cover plate 2-4 has an extended end, and the elastic positioning device is installed on the extended end through the positioning base 3-1.

[0047] During the connection stroke advancement process of the unit, the main circuit connector generates large plug-in resistance, especially for the 630A unit. The plug-in pressure of the main circuit connector reaches 1600N, and the push screw 1 and the grooved positioning piece 7 generate strong extrusion pressure, which is biased toward the rear of the push screw 1. The support force distance of the rear bracket of the push screw 1 is unbalanced with the support force distance of the front bracket, so that the force on the rear of the push screw 1 is greater than that on the front. The push screw 1 is squeezed against the front and rear brackets 2-1 and 2-2, which increases the friction resistance of advancement, causes wear on the push screw 1 and the grooved positioning piece 7, and is not conducive to improving the service life of the hand-cranked propulsion mechanism.

[0048] In this embodiment, the rear end shaft 1-1 of the propulsion screw 1 is lengthened and an auxiliary support bracket 2-3 is additionally installed to provide auxiliary rotational support for the rear end of the propulsion screw 1. During the unit connection stroke propulsion process, the support force distance of the rear bracket of the propulsion screw 1 is basically consistent with the support force distance of the front bracket, thereby reducing the propulsion friction resistance and increasing the life of the hand-cranked propulsion mechanism.

[0049] like Figures 11 to 15 As shown, a partitioned plug-in unit assembly includes a unit chamber 4 and a partitioned plug-in unit 6, wherein the partitioned plug-in unit 6 is provided with the above-mentioned hand-cranked propulsion mechanism, and a grooved positioning member 7 is located on the unit chamber 4. In this embodiment, the hand-cranked propulsion mechanism is specifically installed on the unit bottom plate 6-1 of the partitioned plug-in unit 6, and the grooved positioning member 7 is located on the unit chamber layer plate 4-1 of the unit chamber 4.

[0050] The partitioned plug-in unit assembly of this embodiment uses a main circuit connector to connect the main circuit connection structure of a fixed circuit breaker. The partitioned plug-in unit 6 is plugged in and out by a guide rail, and the two-position plug-in and pull-out operation of the connection position and the separation position is performed by a hand-cranked propulsion mechanism. The unit door 10 is fixed on the cabinet column.

[0051] When the partitioned plug-in unit 6 is plugged in or out, the unit door 10 is in an open state. After the partitioned plug-in unit 6 is pushed to the connection position, the unit door 10 is closed and the circuit breaker is closed.

[0052] The application technology of the separated plug-in unit 6 does not require position display or test position, and only needs to solve the functional requirements of unit advancement. The advancement screw rod 1 of the hand-cranked advancement mechanism of this embodiment is elastically positioned at the starting matching angle by the elastic positioning device, and can effectively cooperate with the grooved positioning member 7 to ensure that the unit advancement stroke is not misaligned.

[0053] When the hand-cranked propulsion mechanism of this embodiment rotates forward, the partitioned plug-in unit 6 enters the connection position from the separation position. When the hand-cranked propulsion mechanism rotates reversely, the partitioned plug-in unit 6 withdraws from the connection position to the separation position. Finally, the partitioned plug-in unit 6 is pulled out of the unit chamber 4.

[0054] The propulsion stroke of the hand-cranked propulsion mechanism of this embodiment is designed to be 4 turns, that is, the propulsion screw rod 1 of the hand-cranked propulsion mechanism rotates 4 turns, so that the separated plug-in unit 6 can be pushed from the separation position to the connection position.

[0055] The partitioned plug-in unit 6 of the present embodiment is a door opening operation unit, and the partitioned plug-in unit 6 is also provided with a closing interlocking mechanism. When the partitioned plug-in unit 6 enters the connection position and the circuit breaker is closed, the closing interlocking rod 9-1 of the closing interlocking mechanism is inserted into the unit chamber layer plate 4-1 to close the partitioned plug-in unit 6. At the same time, the closing interlocking rod 9-1 pushes the closing interlocking plate 9-2 to move by embedding the driving shaft on the closing interlocking rod 9-1 into the inclined groove on the closing interlocking plate 9-2, blocking the operating hole of the operating shaft sleeve 8 of the hand-cranked propulsion mechanism, so that the partitioned plug-in unit 6 cannot be manually operated. Therefore, there is no need to add a position interlocking mechanism, and the unit plug-in application requirements can be met by shaking the hand-cranked propulsion mechanism. It is simple, practical and low-cost.

[0056] like Fig.13 and 15 As shown, the partitioned plug-in unit 6 and the unit chamber 4 of this embodiment also have a separate position maintenance padlock hole 11. When the partitioned plug-in unit 6 is located in the separate position for maintenance, the separate position maintenance padlock hole 11 and the padlock 12 are used to lock it to ensure safety.

[0057] The working process of this embodiment is as follows:

[0058] like Figure 7 and 8 As shown, the separated plug-in unit 6 is in the separated position, the hand-cranked propulsion mechanism is in the initial mating state, the positioning member 3-3 of the elastic positioning device is embedded in the positioning groove 5 of the propulsion screw 1, the propulsion screw 1 is positioned at the initial mating angle, and the mating groove structure 7-1 of the propulsion screw 1 and the groove-shaped positioning member 7 begin to enter the mating state;

[0059] like Fig. 9 and 10 As shown, the hand-cranked propulsion mechanism is manually operated to push the separate plug-in unit 6 from the separation position to the connection position. With each rotation of the hand-cranked propulsion mechanism, the positioning member 3-3 will be embedded in the positioning groove 5 of the operating sleeve 8 of the propulsion screw 1, thereby positioning the propulsion screw 1 and issuing a sound prompt. After 4 rotations of the hand-cranked propulsion mechanism, the separate plug-in unit 6 enters the connection position.

[0060] The effects of this embodiment are:

[0061] Compared with the existing hand-cranked propulsion mechanism with a gear positioning structure, the hand-cranked propulsion mechanism of this embodiment will not change its propulsion stroke even if the propulsion screw 1 of the hand-cranked propulsion mechanism is not at the starting matching angle due to operator error. In addition, the hand-cranked propulsion mechanism will not cause mechanical failure and damage due to error operation like the existing hand-cranked propulsion mechanism with a gear positioning structure.

[0062] The hand-cranked propulsion mechanism of this embodiment can achieve that with each turn of hand cranking, the propulsion screw 1 will be elastically positioned by the elastic positioning device and produce a certain positioning tactile force, while generating a click sound prompt, so that the operator can clearly feel that the hand-cranked propulsion mechanism is positioned, determine the number of hand cranking turns, and avoid misoperation.

[0063] The present invention uses a main circuit connector to connect the main circuit connection structure of a fixed circuit breaker. Compared with the plug-in circuit breaker and base connection structure currently used in the market, the cost is reduced by 35%, the unit depth is reduced by 100mm, and a 500mm wide miniaturized separate plug-in unit assembly can be realized, and the unit can be shut down for maintenance. The hand-cranked propulsion mechanism also solves the starting angle positioning of the propulsion screw rod 1, and the unit can be quickly plugged in and out within 10s.

Claims

1. A hand-cranked propulsion mechanism, characterized by: Including promotion A screw rod, a screw rod mounting bracket and an elastic positioning device. The advancement screw rod is rotatably mounted on the screw rod mounting bracket. The elastic positioning device is mounted on the screw rod mounting bracket. The advancement screw rod is provided with a positioning groove. The elastic positioning device has an elastically pushed-out positioning piece. When the advancement screw rod is rotated to a starting matching angle, the positioning piece is inserted into the positioning groove to position the advancement screw rod.

2. The hand-cranked propulsion mechanism according to claim 1 is characterized in that: The elastic positioning device comprises a positioning base, an elastic member and a positioning member, the positioning member is telescopically inserted into the positioning base, the elastic member is installed in the positioning base and elastically pushes out the positioning member, and the elastic positioning device is installed on the screw mounting bracket through the positioning base.

3. The hand-cranked propulsion mechanism according to claim 1 is characterized in that: The positioning groove is located at the front end of the advancing screw rod, and the elastic positioning device is located above the front end of the advancing screw rod.

4. The hand-cranked propulsion mechanism according to claim 1 or 3, characterized in that: The advancing screw comprises a spiral portion and a front end shaft and a rear end shaft at both ends of the spiral portion. The advancing screw is rotatably mounted on a screw mounting bracket through the front end shaft and the rear end shaft. An operating sleeve is sleeved on the front end shaft, and a positioning groove is located on the operating sleeve.

5. The hand-cranked propulsion mechanism according to claim 4 is characterized in that: The screw rod mounting bracket includes a front bracket, a rear bracket and a cover plate. The front bracket and the rear bracket are respectively located on the front and rear sides of the advancing screw rod. The cover plate is located above the advancing screw rod. The front bracket and the rear bracket are connected together through the cover plate. The front part of the cover plate has an extended end, and the elastic positioning device is installed on the extended end.

6. The hand-cranked propulsion mechanism according to claim 1 is characterized in that: The advancing screw comprises a spiral portion and a front end shaft and a rear end shaft at both ends of the spiral portion, the screw mounting bracket comprises a front bracket and a rear bracket, the front bracket and the rear bracket are respectively located at the front and rear sides of the advancing screw, and the specific structure of the advancing screw being rotatably mounted on the screw mounting bracket is: the front end shaft of the advancing screw passes through the shaft hole of the front bracket, and the rear end shaft of the advancing screw passes through the shaft hole of the rear bracket; The screw mounting bracket also includes an auxiliary support bracket, which is arranged behind the rear bracket. The rear end of the push screw extends axially toward the auxiliary support bracket and passes through the axial hole of the auxiliary support bracket. The axial hole of the rear bracket and the axial hole of the auxiliary support bracket are spaced apart from each other.

7. A partitioned plug-in unit, characterized in that: It comprises the manual propulsion mechanism as claimed in claim 1, which is installed on the bottom plate of the unit and is used for manual propulsion of the unit.

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