AU2020103231A4 - Contact propulsion mechanism in drawer type switch cabinet - Google Patents

Abstract

The invention belongs to the technical field of switch cabinets, and particularly relates a contact propulsion mechanism in a drawer type switch cabinet. including: a control mechanism, a propulsion mechanism, a working position contact and a testing position 5 contact, and wherein the control mechanism is a gear shaft; the propulsion mechanism includes a first gear, a second gear, a first rack plate and a second rack plate; the first gear is fixed on the gear shaft, and gear teeth are arranged on a part of the first gear; the gear teeth on the first gear are matched with the first rack plate to push the first rack plate to move; the second gear is fixed on the gear shaft, and gear teeth are arranged on a part of the second 0 gear; the gear teeth on the second gear are matched with the second rack plate to push the second rack plate to move; the working position contact is fixed on the second rack plate; the testing position contact is fixed on the first rack plate; when the gear shaft rotates, the first gear drives the first rack plate to move upwards so as to drive the testing position contact to move upwards; and when the first rack plate does not move upwards any more, the second 5 gear starts to drive the second rack plate to move upwards so as to drive the working position contact to move upwards. 6/8 4s FIG. 6

Description

6/8

4s

FIG. 6

CONTACT PROPULSION MECHANISM IN DRAWER TYPE SWITCH CABINET

Field

[0001] This is a divisional application of PCT Application No. PCT/CN2018/097828 filed on 1 August 2018, the entire contents of which are hereby incorporated by reference.

[0002] The invention belongs to the technical field of switch cabinets, and particularly relates a contact propulsion mechanism in a drawer type switch cabinet.

Background

[0003] A low-voltage switchgear assembly is equipment completing electric energy control, protection, conversion and distribution in a low-voltage power supply system, and is widely applied to industrial enterprises, public places and residential buildings. At present, low-voltage switch cabinet assemblies mainly include two types in China, i.e., a fixed panel type and a drawer type. The drawer type switch cabinet is excellent in electrical property and type and has gone beyond common fixed cabinets.

[0004] The drawer type switch cabinet is an enclosed type switchgear assembly having a higher protection level. An enclosed shell of the switch cabinet is made of steel plates, and electric components of inlet-outlet line circuits are installed in a withdrawable component, thereby completing a certain power supply or distribution function. According to the drawer type switch cabinet, a common knife switch is omitted, a total space occupied by installation of accessories is narrowed, and more circuits are connected in the cabinet. Meanwhile, if the drawer type switch cabinets are of the same specification, spare drawers may be replaced in sudden failure circumstances, thus power failure for a longer time is avoided. The drawer type switch cabinet has higher reliability, safety and interchangeability, and is applicable to !5 places with higher power supply reliability requirements.

[0005] Internal accessories are integrated in drawer units. A contact in the drawer type switch cabinet is generally provided with a working position (i.e., a switch connection position), a testing position and an isolation position (switches are separated from one another), has major effects of working, testing and separating.

[0006] A Chinese patent application with an application number of 201520250682.1 discloses a novel drawer unit operating mechanism. The operating mechanism includes a drawer bottom plate, a contact propulsion rod, a shaft sleeve, a gear shaft, a secondary propulsion rod, a stop block, a left transverse rack, a right transverse rack, a double-layer gear, a left longitudinal rack, a right longitudinal rack, a secondary terminal plug, a secondary terminal socket and keys. The gear shaft is sleeved with the shaft sleeve, and key holes well matched with the keys are formed in the shaft sleeve and the gear shaft; the shaft sleeve is meshed with the secondary propulsion rod; upper and lower sides of the gear shaft are respectively meshed with the left transverse rack and the right transverse rack; the secondary propulsion rod and the second terminal plug are clamped together; the secondary terminal socket is connected with the drawer bottom plate; the double-layer gear includes a left-side double-layer gear and a right-side double-layer gear; both the left-side double-layer gear and the right-side double-layer gear are positioned on the drawer bottom plate; upper teeth of the left-side double-layer gear are meshed with the left transverse rack; lower teeth of the left-side double-layer gear are meshed with the left longitudinal rack; lower teeth of the right-side double-layer gear are meshed with the right transverse rack; upper teeth of the right-side double-layer gear are meshed with the right longitudinal rack; the stop block is fixed on the drawer bottom plate by rivets; and the contact propulsion rod is respectively riveted with the longitudinal racks.

[0007] In the novel drawer unit operating mechanism, the keys include a working key and a testing key. When the working key is inserted into the corresponding key hole, if the key is turned forwards, both the shaft sleeve and the gear shaft rotate; and if the key is turned reversely, contacts are separated from vertical plates, and the drawer is located at an off position. When the testing key is inserted into the corresponding key hole, if the key is turned, only the shaft sleeve rotates. According to the novel drawer unit operating mechanism, an aim of controlling the drawer to be located in different circuit contact states is achieved by directly driving the contact to move by a transmission mechanism. However, the aim may be achieved only when the two keys are operated in sequence, and efficiency is low. Moreover, the two keys are easy to misidentify so as to cause misoperation. If any of the two keys is lost, !5 the state of the drawer unit operating mechanism cannot be controlled.

[0008] Any references to prior art should not be taken as admissions of common general knowledge in the field.

Summary

[0009] A purpose of the invention is to provide a propulsion mechanism capable of conveniently and effectively controlling a contact state in a drawer type switch cabinet, namely, adjustment of an isolation position, a testing position and a working position of a contact may be controlled by an operating tool only.

[0010] With respect to the above technical purpose, a technical solution of the invention is as follows:

[0011] A contact propulsion mechanism in a drawer type switch cabinet, including: a control mechanism, a propulsion mechanism, a working position contact and a testing position contact, and the control mechanism is a gear shaft; the propulsion mechanism includes a first gear, a second gear, a first rack plate and a second rack plate; the first gear is fixed on the gear shaft, and gear teeth are arranged on a part of the first gear; the gear teeth on the first gear are matched with the first rack plate to push the first rack plate to move; the second gear is fixed on the gear shaft, and gear teeth are arranged on a part of the second gear; the gear teeth on the second gear are matched with the second rack plate to push the second rack plate to move; the working position contact is fixed on the second rack plate; the testing position contact is fixed on the first rack plate; when the gear shaft rotates, the first gear drives the first rack plate to move upwards so as to drive the testing position contact to move upwards; and when the first rack plate does not move upwards any more, the second gear starts to drive the second rack plate to move upwards so as to drive the working position contact to move upwards.

[0012] Specifically, a front end of the gear shaft is arranged in a panel hole in a front end of a switch cabinet drawer, and a rear end of the gear shaft is fixed on a side plate of the switch cabinet drawer by virtue of a gear shaft fixing seat.

[0013] Asa further improvement of the invention, a fan-shaped bulge is arranged on apart, which is not provided with gear teeth, of the first gear; and a groove matched with the fan-shaped bulge of the first gear is formed in a rack on a lower part of thefirst rack plate.

[0014] Asa further improvement of the invention, a lateral fan-shaped bulge is arranged on a left side or a right side of the second gear; upper and lower protruding clamping lugs are arranged on a same side of the second rack plate and the lateral fan-shaped bulge; and the !5 lateral fan-shaped bulge is positioned between the upper and lower clamping lugs when the second gear is not matched with the second rack plate.

[0015] As a further improvement of the invention, a contact propulsion mechanism in a drawer type switch cabinet, further including: a switch cabinet drawer locking mechanism, wherein the locking mechanism includes a fan-shaped gear, a clamping plate fixing rack and a clamping plate; the fan-shaped gear is positioned on the gear shaft; the clamping plate fixing rack is fixed on a lower plate and the side plate of the switch cabinet drawer; the clamping plate is positioned in the clamping plate fixing rack; an upper end of the clamping plate is in contact with the fan-shaped gear; and the clamping plate moves up and down along with rotation of the fan-shaped gear.

[0016] Specifically, a gap is formed in the lower plate of the switch cabinet drawer corresponding to a lower end of the clamping plate; a slot is formed in a switch cabinet body corresponding to a lower end of the gap; and when the clamping plate moves downwards, the clamping plate enters the gap of the lower plate of the drawer and the slot of the switch cabinet body in sequence.

[0017] Specifically, the locking mechanism further includes a spring, a lower end of the spring is connected with the clamping plate, and an upper end of the spring is connected with the clamping plate fixing rack.

[0018] Specifically, the clamping plate is made by bending a metal plate and has a bent angle of 90 degrees.

[0019] According to the above technical solution, compared with the prior art, the invention has the following beneficial effects: according to the contact propulsion mechanism in the invention, the isolation position, the testing position and the working position of the contacts in the contact state in the drawer type switch cabinet may be adjusted by one operating tool only, so that labor-saving and efficient effects are achieved; and due to the locking mechanism, the contact propulsion mechanism has higher safety.

Brief Description of the Drawings

[0020] FIG. 1 is a schematic diagram of installation of a contact propulsion mechanism in a drawer type switch cabinet;

[0021] FIG. 2 is an overall schematic diagram of a contact propulsion mechanism in a drawer type switch cabinet;

[0022] FIG. 3 is a structural schematic diagram of a gear shaft; !5 [0023] FIG. 4 is a structural schematic diagram of contacts at a testing position;

[0024] FIG. 5 is a schematic diagram of installation of a first gear and a second gear;

[0025] FIG. 6 is a schematic diagram of an isolation position of contacts in an operating state 1;

[0026] FIG. 7 is a schematic diagram of a testing position of contacts in an operating state 2; and

[0027] FIG. 8 is a schematic diagram of a working position of contacts in an operating state 3.

[0028] In figures: 1: contact propulsion mechanism; 2: gear shaft; 31: first gear; 32: second gear; 33: first rack plate groove; 34: first rack plate; 35: sector bulge offirst gear; 36: second rack plate; 37: lateral sector bulge; 4: testing position contact; 5: working position contact; 61: fan-shaped gear; 62: clamping plate; and 63: clamping plate fixing rack.

Detailed Description of the Embodiments

[0029] The technical solution in embodiments of the invention will be clearly and fully described below in combination with accompanying drawings in the embodiments of the invention.

[0030] Contacts in a drawer type switch cabinet has three operating states as follows:

[0031] In state 1, i.e., at an isolation position, a working position contact and a testing position contact are not connected at the moment;

[0032] In state 2, i.e., at a testing position, the working position contact is not connected, while the testing position contact is connected at the moment; and

[0033] In state 3, i.e., at a working position, both the working position contact and the testing position contact are connected at the moment.

[0034] As shown in FIGS. 1 and 2, a contact propulsion mechanism 1 in a drawer type switch cabinet is provided by an embodiment, and includes a control mechanism, a propulsion mechanism, a working position contact 5 and a testing position contact 4.

[0035] The control mechanism in the embodiment is a gear shaft 2. Specifically, as shown in FIGS. 1 and 5, a front end of the gear shaft 2 is arranged in a panel hole in a front end of a switch cabinet drawer, and a rear end of the gear shaft 2 is fixed on a side plate of the switch cabinet drawer by virtue of a gear shaft fixing seat. Therefore, the gear shaft 2 may freely rotate in the panel hole and the fixing seat.

[0036] As shown in FIGS. 3 and 5, the propulsion mechanism includes a first gear 31, a !5 second gear 32, a first rack plate 34 and a second rack plate 36; the first gear 31 is fixed on the gear shaft 2 and integrally molded with the gear shaft 2, and gear teeth are arranged on a part of the first gear; the gear teeth on the part are matched with a rack on the first rack plate 34 so as to push the first rack plate 34 to move; a fan-shaped bulge 35 is arranged on a part, which is not provided with gear teeth, of the first gear 31; and a groove 33 matched with the fan-shaped bulge 35 of the first gear is formed in a rack on a lower part of thefirst rack plate 34. As shown in FIG. 4, after the first rack plate 34 is driven by the first gear 31 to a certain position, the fan-shaped bulge 35 of the first gear rotates idly in the groove 33 of the first rack plate 34, so that the first rack plate 34 cannot be continuously driven, and then, an effect of fixing the first rack plate 34 is achieved. Under the action of the fan-shaped bulge 35 of the first gear, the first rack plate 34 is prevented from moving up and down due to gravity and other factors, thereby improving safety. The second gear 32 is fixed on the gear shaft 2 and integrally molded with the gear shaft 2, and gear teeth are arranged on a part of the second gear, and are matched with a rack on the second rack plate 36 so as to push the second rack plate 36 to move; a part, which is not provided with gear teeth, of the second gear 32 is provided with empty teeth; a lateral fan-shaped bulge 37 is arranged on a right side of the second gear 32; upper and lower protruding clamping lugs are arranged on a right side of the second rack plate 36; and the lateral fan-shaped bulge 37 is positioned between the upper and lower clamping lugs when the second gear 32 is not matched with the second rack plate 36. Therefore, the second rack plate 36 is prevented from moving up and down due to the gravity and other factors, and the safety is increased.

[0037] Specifically, the working position contact 5 and the second rack plate 36 are integrally machined in the embodiment; and the testing position contact 4 and the first rack plate 34 are integrally machined.

[0038] The contact propulsion mechanism 1 in the drawer type switch cabinet in the embodiment further includes a switch cabinet drawer locking mechanism. As shown in FIGS. 1 and 2, the locking mechanism includes a fan-shaped gear 61, a clamping plate fixing rack 63 and a clamping plate 62; the fan-shaped gear 61 and the gear shaft 2 are integrally machined; the clamping plate fixing rack 63 is fixed on a lower plate and the side plate of the switch cabinet drawer; the clamping plate 62 is positioned in the clamping plate fixing rack 63; an upper end of the clamping plate 62 is in contact with the fan-shaped gear 61, so that the clamping plate 62 moves up and down along with rotation of the fan-shaped gear 61. Specifically, a gap is formed in the lower plate of the switch cabinet drawer corresponding to a lower end of the clamping plate 62; a slot is formed in a switch cabinet body corresponding !5 to a lower end of the gap; and when the gear shaft 2 rotates, the fan-shaped gear 61 rotates along with the gear shaft 2, the clamping plate 62 is driven to move downwards, and the clamping plate 62 enters the gap of the lower plate of the switch cabinet drawer and the slot of the switch cabinet body in sequence so as to lock the switch cabinet drawer. Therefore, the switch cabinet drawer cannot be pulled out at the testing position or the working position, thereby improving the safety. Specifically, the locking mechanism further includes a spring. A lower end of the spring is connected with the clamping plate 62; and an upper end of the spring is connected with the clamping plate fixing rack 63. The spring provides a restoring force, so that the clamping plate 62 is always in contact with the fan-shaped gear 61. Specifically, the clamping plate 62 is made by bending a metal plate and has a bent angle of

90 degrees, and thus the clamping plate 62 may be well in contact with the fan-shaped gear 61.

[0039] A working principle of the invention is as follows: as shown in FIG. 6, at the moment, the contacts are located at the isolation position, the fan-shaped bulge 35 of the first gear is positioned in the groove 33 of the first rack plate, the lateral fan-shaped bulge 37 is positioned between the upper and lower clamping lugs on the right side of the second rack plate, the clamping plate 62 is not downwards extruded by the fan-shaped gear 61, and the switch cabinet drawer can be freely pulled out. As shown in FIG. 7, at the moment, the contacts are located at the testing position, the gear shaft 2 starts to rotate, the teeth of the first gear 31 start to be matched with the rack of the first rack plate 34, and the first rack plate 34 is driven to move upwards so as to drive the testing position contact 4 to move upwards and connect corresponding circuits; and the lateral fan-shaped bulge 37 is still positioned between the upper and lower clamping lugs on the right side of the second rack plate; the working position contact 5 does not move upwards; and the clamping plate 62 is downwards extruded by the fan-shaped gear 61 so as to lock the drawer. As shown in FIG. 8, at the moment, the contacts are located at the working position, as the gear shaft 2 rotates, when the first rack plate 34 does not move upwards any more, the fan-shaped bulge 35 of the first gear is positioned in the groove 33 of the first rack plate; the second gear 32 starts to drive the second rack plate 36 to move upwards so as to drive the working position contact 5 to move upwards and connect the corresponding circuits, and the clamping plate 62 is still downwards extruded by the fan-shaped gear 61 so as to lock the switch cabinet drawer.

[0040] Although the invention has been disclosed as above in the preferred embodiment, the embodiment is not a limitation of the invention. Any equivalent change or modification without deviating from the spirit and scope of the invention is also included in the protection scope of the invention. Therefore, the protection scope of the invention should be based on contents defined by claims of the invention.

Claims (8)

1. A contact propulsion mechanism in a drawer type switch cabinet, including: a control mechanism, a propulsion mechanism, a working position contact and a testing position contact, and wherein the control mechanism is a gear shaft; the propulsion mechanism includes a first gear, a second gear, a first rack plate and a second rack plate; the first gear is fixed on the gear shaft, and gear teeth are arranged on a part of the first gear; the gear teeth on the first gear are matched with the first rack plate to push the first rack plate to move; the second gear is fixed on the gear shaft, and gear teeth are arranged on a part of the second gear; the gear teeth on the second gear are matched with the second rack plate to push the second rack plate to move; the working position contact is fixed on the second rack plate; the testing position contact is fixed on the first rack plate; when the gear shaft rotates, the first gear drives the first rack plate to move upwards so as to drive the testing position contact to move upwards; and when the first rack plate does not move upwards any more, the second gear starts to drive the second rack plate to move upwards so as to drive the working position contact to move upwards.

2. The contact propulsion mechanism in the drawer type switch cabinet as recited in claim 1, wherein a front end of the gear shaft is arranged in a panel hole in a front end of a switch cabinet drawer, and a rear end of the gear shaft is fixed on a side plate of the switch cabinet drawer by virtue of a gear shaft fixing seat.

3. The contact propulsion mechanism in the drawer type switch cabinet as recited in claim 1, wherein a fan-shaped bulge is arranged on a part, which is not provided with gear teeth, of the first gear; and a groove matched with the fan-shaped bulge of the first gear is formed in a rack on a lower part of the first rack plate.

!5 4. The contact propulsion mechanism in the drawer type switch cabinet as recited in claim 1, wherein a lateral fan-shaped bulge is arranged on a left side or a right side of the second gear; upper and lower protruding clamping lugs are arranged on a same side of the second rack plate and the lateral fan-shaped bulge; and the lateral fan-shaped bulge is positioned between the upper and lower clamping lugs when the second gear is not matched with the second rack plate.

5. The contact propulsion mechanism in the drawer type switch cabinet as recited in claim 1, further including: a switch cabinet drawer locking mechanism, wherein the locking mechanism includes a fan-shaped gear, a clamping plate fixing rack and a clamping plate; the fan-shaped gear is positioned on the gear shaft; the clamping plate fixing rack is fixed on a lower plate and the side plate of the switch cabinet drawer; the clamping plate is positioned in the clamping plate fixing rack; an upper end of the clamping plate is in contact with the fan-shaped gear; and the clamping plate moves up and down along with rotation of the fan-shaped gear.

6. The contact propulsion mechanism in the drawer type switch cabinet as recited in claim 5, wherein a gap is formed in the lower plate of the switch cabinet drawer corresponding to a lower end of the clamping plate; a slot is formed in a switch cabinet body corresponding to a lower end of the gap; and when the clamping plate moves downwards, the clamping plate enters the gap of the lower plate of the drawer and the slot of the switch cabinet body in sequence.

7. The contact propulsion mechanism in the drawer type switch cabinet as recited in claim 1, wherein the locking mechanism further includes a spring, a lower end of the spring is connected with the clamping plate, and an upper end of the spring is connected with the clamping plate fixing rack.

8. The contact propulsion mechanism in the drawer type switch cabinet as recited in claim 7, wherein the clamping plate is made by bending a metal plate and has a bent angle of 90 degrees.