Bidirectional synchronous high-efficiency compound gear transmission mechanism of isolating switch

Abstract

The invention belongs to the technical field of power switch equipment, and particularly relates to a bidirectional synchronous high-efficiency compound gear transmission mechanism of an isolating switch. The bidirectional synchronous high-efficiency compound gear transmission mechanism of the isolating switch comprises a shell, a transmission shaft is mounted on the shell and connected with a main driving gear, and is characterized in that the upper side and the lower side of the main driving gear are meshed with an upper rack and a lower rack respectively, the upper rack is connected with a left movable conducting rod through a left insulating pull rod, and the lower rack is connected with a right movable conducting rod through a right insulating pull rod. The lower rack is connected with a right movable conducting rod through a right insulating pull rod, the left movable conducting rod and the right movable conducting rod are connected with a static contact through conducting contact fingers respectively, and the left movable conducting rod and the right movable conducting rod are connected with a movable contact respectively. The invention has the beneficial effects that the symmetrical racks on the two sides can be driven to move through one gear, so that the opening and closing actions of the contact are realized, the structure is simple and compact, the reliability is high, the modularization is high, and the installation and debugging are convenient and fast.

Description

Technical Field

[0001] The present invention belongs to the technical field of power switch equipment, and in particular relates to a bidirectional synchronous high-efficiency composite gear transmission mechanism for an isolating switch. Background Art

[0002] In traditional disconnect switches, rack-and-pinion transmissions typically use a single pinion driving a single rack to achieve unidirectional motion. Bidirectional transmission requires the addition of an additional reverse gear set or reversing mechanism, resulting in a complex, bulky structure and low transmission efficiency. Existing dual-rack synchronous reverse transmissions often employ a dual-gear top-to-top meshing design, which presents problems such as cumulative meshing backlash errors and significant energy loss. Furthermore, under high loads, the transmission design is prone to rack deflection due to uneven friction, compromising motion accuracy. Summary of the Invention

[0003] In order to overcome the deficiencies of the prior art, the present invention provides a bidirectional synchronous and efficient composite gear transmission mechanism for an isolating switch.

[0004] The present invention is achieved through the following technical solutions: A bidirectional synchronous high-efficiency composite gear transmission mechanism for an isolating switch includes a housing, a transmission shaft is mounted on the housing, and the transmission shaft is connected to a main drive gear. The mechanism is characterized in that: the upper and lower sides of the main drive gear are respectively engaged with an upper rack and a lower rack, the upper rack is connected to a left movable conductive rod via a left insulating pull rod, the lower rack is connected to a right movable conductive rod via a right insulating pull rod, the left movable conductive rod and the right movable conductive rod are respectively connected to a static contact via conductive contact fingers, and the left movable conductive rod and the right movable conductive rod are respectively connected to movable contacts.

[0005] The main drive gear is a double-module gear with an elliptical involute tooth profile.

[0006] The working surfaces of the upper rack and the lower rack are both composed of a high-strength meshing section and a flexible buffer section.

[0007] The back sides of the upper rack and the lower rack are provided with cross roller guide rails.

[0008] Disc spring groups are provided at the ends of the upper rack and the lower rack.

[0009] A guide sleeve is respectively provided outside the left movable conductive rod and the right movable conductive rod.

[0010] A bearing is installed on the transmission shaft, and a fixing plate is installed between the bearing and the housing.

[0011] A conductor is installed on the shell.

[0012] Shielding covers are respectively installed at both ends of the shell.

[0013] The beneficial effects of the present invention are: a single gear can drive the movement of the symmetrical racks on both sides, thereby realizing the opening and closing actions of the contacts; the structure is simple and compact, the reliability is high, and it has the advantages of high modularity and convenient and quick installation and debugging. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention will be further described below with reference to the accompanying drawings.

[0015] Attachment Figure 1 It is a structural schematic diagram of the present invention; Attachment Figure 2 This is a schematic diagram of the structure of the present invention in the open state; Attachment Figure 3 This is a schematic diagram of the structure of the present invention in a closed state; In the figure, 1 is a housing, 2 is a transmission shaft, 3 is a main drive gear, 4 is an upper rack, 5 is a lower rack, 6 is a left insulating pull rod, 7 is a left movable conductive rod, 8 is a right insulating pull rod, 9 is a right movable conductive rod, 10 is a conductive contact finger, 11 is a static contact, 12 is a movable contact, 13 is a high-strength meshing section, 14 is a flexible buffer section, 15 is a cross roller guide, 16 is a disc spring group, 17 is a guide sleeve, 18 is a bearing, 19 is a fixed plate, 20 is a conductor, and 21 is a shielding cover. DETAILED DESCRIPTION

[0016] The accompanying drawings illustrate a specific embodiment of the present invention. This embodiment comprises a housing 1, on which is mounted a transmission shaft 2 connected to a main drive gear 3. The main drive gear 3 is meshed with an upper rack 4 and a lower rack 5 at its upper and lower sides, respectively. The upper rack 4 is connected to a left movable conductive rod 7 via a left insulating pull rod 6, and the lower rack 5 is connected to a right movable conductive rod 9 via a right insulating pull rod 8. The left movable conductive rod 7 and the right movable conductive rod 9 are each connected to a stationary contact 11 via a conductive contact finger 10. The left movable conductive rod 7 and the right movable conductive rod 9 are each connected to a movable contact 12.

[0017] The main drive gear 3 is dual-module and features an elliptical involute tooth profile. The working surfaces of the upper and lower racks 4 and 5 are composed of a high-strength meshing section 13 and a flexible buffer section 14. Cross-roller guides 15 are located on the backs of the upper and lower racks 4 and 5. Disc spring assemblies 16 are located at the ends of the upper and lower racks 4 and 5.

[0018] A guide sleeve 17 is provided on the outside of the left moving conductive rod 7 and the right moving conductive rod 9. A bearing 18 is installed on the transmission shaft 2, and a fixing plate 19 is installed between the bearing 18 and the housing 1. A conductor 20 is installed on the housing 1. Shielding covers 21 are installed at both ends of the housing 1.

[0019] The present invention utilizes a bidirectional, synchronous, and efficient composite gear transmission mechanism for disconnectors. It employs a composite gear topology. The main drive gear (3) features a dual-module design with an elliptical involute tooth profile, meshing with a bilaterally symmetrical stepped rack. The rack's working surface is divided into a high-strength meshing section (13) and a flexible buffer section (14). A cross-roller guide (15) is integrated into the rack's back. A bidirectional, self-compensating synchronization system is also implemented, and a disc spring assembly (16) is installed at the rack's end to dynamically absorb the impact energy of the rack's synchronous operation.

[0020] The motor rotates the drive shaft 2, which in turn drives the main drive gear 3 clockwise. This drives the upper rack 4 to the right and the lower rack 5 to the left, separating the moving contact 12 from the stationary contact 11, thereby opening the circuit breaker. The drive shaft 2 rotates the main drive gear 3 counterclockwise, driving the upper rack 4 to the left and the lower rack 5 to the right. This connects the moving contact 12 and the stationary contact 11 via the conductive contact fingers 10, thereby closing the circuit breaker.

Claims

1. A bidirectional synchronous high-efficiency composite gear transmission mechanism for an isolating switch, comprising a housing (1), a transmission shaft (2) mounted on the housing (1), the transmission shaft (2) being connected to a main drive gear (3), and characterized by: The upper and lower sides of the main drive gear (3) are respectively engaged with the upper rack (4) and the lower rack (5); the upper rack (4) is connected to the left movable conductive rod (7) through the left insulating pull rod (6); the lower rack (5) is connected to the right movable conductive rod (9) through the right insulating pull rod (8); the left movable conductive rod (7) and the right movable conductive rod (9) are respectively connected to the static contact (11) through the conductive contact finger (10); and the left movable conductive rod (7) and the right movable conductive rod (9) are respectively connected to the movable contact (12).

2. The bidirectional synchronous high-efficiency compound gear transmission mechanism for the disconnector according to claim 1 is characterized by: The main drive gear (3) is dual-module and has an elliptical involute tooth profile.

3. The bidirectional synchronous high-efficiency compound gear transmission mechanism for disconnecting switches according to claim 1 is characterized in that: The working surfaces of the upper rack (4) and the lower rack (5) are both composed of a high-strength meshing section (13) and a flexible buffer section (14).

4. The bidirectional synchronous high-efficiency compound gear transmission mechanism for disconnecting switches according to claim 1 is characterized in that: Cross roller guide rails (15) are provided on the backs of the upper rack (4) and the lower rack (5).

5. The bidirectional synchronous high-efficiency compound gear transmission mechanism for disconnecting switches according to claim 1 is characterized in that: Disc spring groups (16) are provided at the ends of the upper rack (4) and the lower rack (5).

6. The bidirectional synchronous high-efficiency compound gear transmission mechanism for disconnecting switches according to claim 1 is characterized in that: The left movable conductive rod (7) and the right movable conductive rod (9) are respectively provided with guide sleeves (17) outside.

7. The bidirectional synchronous high-efficiency compound gear transmission mechanism for disconnecting switches according to claim 1 is characterized in that: A bearing (18) is installed on the transmission shaft (2), and a fixing plate (19) is installed between the bearing (18) and the housing (1).

8. The bidirectional synchronous high-efficiency compound gear transmission mechanism for disconnecting switches according to claim 1 is characterized in that: A conductor (20) is mounted on the housing (1).

9. The bidirectional synchronous high-efficiency compound gear transmission mechanism for disconnecting switches according to claim 1 is characterized in that: Shielding covers (21) are respectively installed at both ends of the housing (1).

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