Anti-locked-rotor structure of built-in load switch of electric energy meter and built-in load switch of electric energy meter

Abstract

The utility model provides an electric energy meter built-in load switch anti-locked-rotor structure and an electric energy meter built-in load switch, the electric energy meter built-in load switch anti-locked-rotor structure comprises a worm and a worm gear engaged with the worm, the worm comprises a power part and a transmission part connected with the power part, and the transmission part is engaged with the worm gear; a driving block is arranged on the power part, a following block is arranged on the transmission part, the driving block rotates along with the power part and forms a motion path, and the following block is arranged in the motion path; when the worm gear and the worm are self-locked, the power part rotates reversely, the driving block moves along the movement path until the following block is driven to rotate and the transmission part is synchronously driven to rotate, so that self-locking of the worm gear and the worm is relieved, and after self-locking is relieved, the motor continues to rotate forwards to drive the power part to rotate forwards and drive the transmission part to rotate forwards at the same time. And the worm gear and the worm return to normal work.

Description

Technical Field

[0001] The utility model relates to the technical field of load switches, and is particularly suitable for an anti-blocking structure of a built-in load switch of an electric energy meter and the built-in load switch of the electric energy meter. Background Art

[0002] In the built-in load switch of the electricity meter, a worm gear is usually used for transmission. The worm gear transmission structure has the advantages of a large transmission speed ratio and a simple structure. However, there is also the problem of directional self-locking due to the fit clearance, surface friction and material deformation between the worm gear and the worm when it is stalled by impact. At the same time, the starting torque generated by the motor at the moment of starting is relatively small, which can easily lead to motor stalling and product failure. Utility Model Content

[0003] The purpose of the utility model is to solve the above problems and to provide an anti-blocking structure of a built-in load switch of an electric energy meter and a built-in load switch of the electric energy meter.

[0004] To achieve the above-mentioned purpose of the utility model, the utility model provides an anti-stalling structure of a built-in load switch of an electric energy meter, comprising a worm and a worm wheel meshing with the worm, the worm comprising a power part and a transmission part connected to the power part, the transmission part meshing with the worm wheel;

[0005] A driving block is provided on the power part, and a following block is provided on the transmission part. The driving block rotates following the power part and forms a motion path. The following block is provided in the motion path.

[0006] When the worm wheel and worm are self-locking, the power unit rotates in reverse, and the driving block moves in the motion path until it drives the following block to rotate, thereby synchronously driving the transmission unit to rotate;

[0007] The power unit includes a connecting block and a connecting column arranged on the connecting block, and the driving block is arranged on the cylindrical surface of the connecting column;

[0008] The transmission part includes an annular housing and a threaded column connected to the annular housing, the follower block is arranged in the annular housing, and the threaded column is engaged with the worm gear;

[0009] The connecting column is inserted into the annular shell and can rotate in the annular shell.

[0010] More specifically, when the driving block and the following block are in contact, two opposite side surfaces fit together.

[0011] More specifically, a connecting groove is provided on the connecting block, and the end portion of the annular shell is inserted into the connecting groove on the outer side of the connecting column.

[0012] More specifically, the end of the connecting column extends radially outward to form a connecting platform, the connecting platform is arranged at one end of the connecting column close to the connecting block, the connecting platform is arranged in the connecting groove, and the end of the annular shell is inserted into the connecting groove outside the connecting platform.

[0013] More specifically, an annular platform is formed by radially extending inwardly in the annular shell. The annular platform is arranged at one end of the annular shell close to the threaded column, and the end of the connecting column is inserted into the annular platform.

[0014] More specifically, a motor is provided on a side of the power unit away from the transmission unit, and a motor shaft is provided on the motor;

[0015] A first motor hole is provided on the power part, and a second motor hole is provided on the transmission part. The first motor hole and the second motor hole are coaxially arranged. The diameter of the second motor hole is smaller than the diameter of the first motor hole. The motor shaft passes through the first motor hole and extends into the second motor hole.

[0016] More specifically, a bell mouth is provided on a side of the first motor hole away from the second motor hole.

[0017] More specifically, a boss is provided on a side of the power unit close to the motor.

[0018] A built-in load switch for an electric energy meter comprises an anti-locking structure for a built-in load switch for an electric energy meter.

[0019] The utility model mainly designs an anti-jamming structure of a built-in load switch of an electric energy meter and a built-in load switch of an electric energy meter, a driving block is arranged on the power part, and a following block is arranged on the transmission part. When the power part rotates, the driving block drives the following block to rotate. When the worm gear is self-locked, the power part rotates in the opposite direction, and the driving block follows the power part to rotate along the motion path until it contacts the following block within the motion path and gives the transmission part a force to rotate in the opposite direction. The worm gear is released from self-locking. After the release, the motor continues to rotate forward, driving the power part to rotate forward, and at the same time driving the transmission part to rotate forward. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The exemplary embodiments of the present application will be described in detail below with reference to the accompanying drawings. It should be understood that the embodiments described below are only used to explain the present application and are not intended to limit the scope of the present application. In the accompanying drawings:

[0021] Figure 1 This is a schematic diagram of the three-dimensional structure of the anti-rotation blocking structure of the utility model;

[0022] Figure 2 This is a schematic diagram of the main structure of the motor and worm gear of the utility model;

[0023] Figure 3 This utility model Figure 2 Schematic diagram of the cross-sectional structure of the middle BB;

[0024] Figure 4 This is a schematic diagram of the three-dimensional structure of the motor and the power unit of the utility model;

[0025] Figure 5 It is a three-dimensional structural diagram of the worm of the utility model;

[0026] Figure 6 This is a schematic diagram of the main structure of the worm of the present utility model;

[0027] Figure 7 This utility model Figure 6 AA cross-sectional structural diagram;

[0028] Figure 8 It is a schematic diagram of the three-dimensional structure of the power unit of the utility model;

[0029] Figure 9 It is a three-dimensional structural diagram of the transmission part of the utility model;

[0030] Figure 10 This is a schematic diagram of the internal structure of the load switch of the utility model;

[0031] Figure 11 This is a schematic diagram of the three-dimensional structure of the load switch of the utility model;

[0032] In the figure: 1. Motor; 11. Motor shaft; 2. Worm; 21. Power unit; 211. Connecting block; 212. Connecting column; 213. Connecting platform; 214. Driving block; 215. First motor hole; 22. Transmission unit; 221. Annular shell; 222. Threaded column; 223. Annular platform; 224. Follower block; 225. Second motor hole; 23. Boss; 3. Worm gear; 4. Anti-blocking structure; 5. Load switch; 51. Clutch cam; 52. Opening and closing assembly; 53. Shell. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solutions and advantages of the implementation of the present invention clearer, the technical solutions in the embodiments of the present invention will be described in more detail below in conjunction with the drawings in the embodiments of the present invention. In the drawings, the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The described embodiments are part of the embodiments of the present invention, not all of the embodiments. The embodiments described below with reference to the drawings are exemplary and are intended to be used to explain the present invention, and should not be understood as limitations on the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0034] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are only used to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific direction, be constructed and operate in a specific direction. Therefore, they should not be understood as limiting the scope of protection of the present invention. The following is a detailed description of the embodiments of the present invention in conjunction with the accompanying drawings.

[0035] It should be understood that the drawings are only used to illustrate the present application.

[0036] An anti-locking structure for an electric energy meter with a built-in load switch, such as Figures 1-9 As shown, it includes a motor 1, a worm 2 connected to the motor 1, and a worm wheel 3 engaged with the worm 2. The motor 1 transmits power to the worm 2, and the worm 2 rotates accordingly, synchronously driving the worm wheel 3 to rotate.

[0037] The worm 2 includes a power part 21 and a transmission part 22 connected to the power part 21, and the transmission part 22 is engaged with the worm wheel 3; a driving block 214 is provided on the power part 21, and a following block 224 is provided on the transmission part 22. The driving block 214 rotates following the power part 21 and forms a motion path. The following block 224 is set in the motion path. When the worm wheel 3 and the worm 2 are self-locked, the power part 21 is reversed, and the driving block 214 moves in the motion path until it drives the following block 224 to rotate, thereby synchronously driving the transmission part 22 to rotate.

[0038] The power unit 21 includes a connecting block 211 and a connecting column 212 arranged on the connecting block 211, the driving block 214 is arranged on the cylindrical surface of the connecting column 212, the connecting column 212 is coaxially arranged with the connecting block 211, and the diameter of the connecting column 212 is smaller than the diameter of the connecting block 211; the transmission unit 22 includes an annular shell 221 and a threaded column 222 connected to the annular shell 221, the annular shell 221 and the threaded column 222 are coaxially arranged, the follower block 224 is arranged on the annular shell 221, and the threaded column 222 is engaged with the worm gear 3.

[0039] When the power part 21 is connected to the transmission part 22, the annular shell 221 is sleeved on the outside of the connecting column 212, and the connecting column 212 is inserted into the annular shell 221. The driving block 214 and the following block 224 are located in the area between the annular shell 221 and the connecting column 212. The connecting column 212 can rotate in the annular shell 221. When the connecting column 212 rotates, the driving block 214 rotates along the motion path until it abuts against the following block 224. The driving block 214 drives the following block 224 to rotate, thereby synchronously driving the transmission part 22 to rotate.

[0040] In order to further position the connection of the worm 2, a connecting groove is provided on the connecting block 211, and the connecting column 212 is provided in the connecting groove. When the power part 21 is connected to the transmission part 22, the end of the annular shell 221 is inserted into the space enclosed between the connecting groove and the connecting column 212 for easy positioning. Furthermore, the end of the connecting column 212 extends radially outward to form a connecting platform 213, and the connecting platform 213 is arranged at one end of the connecting column 212 close to the connecting block 211, and the connecting platform 213 is arranged in the connecting groove. The connecting block 211, the connecting platform 213 and the connecting column 212 are coaxially arranged, and the diameter of the connecting column 212 is smaller than the diameter of the connecting platform 213, and the diameter of the connecting platform 213 is smaller than the diameter of the connecting block 211; when the power part 21 is connected to the transmission part 22, the end of the annular shell 221 is inserted between the connecting groove and the connecting platform 213, and the driving block 214 and the follower block 224 are located between the annular shell 221 and the connecting column 212. At this time, a gap is left between the annular shell 221 and the power part 21, so that the power part 21 can rotate freely.

[0041] In order to better position the connection of the worm 2, an annular platform 223 is formed by extending radially inward in the annular shell 221. The annular platform 223 is arranged at one end of the annular shell 221 close to the threaded column 222. The annular shell 221 and the annular platform 223 are coaxially arranged. The diameter of the annular platform 223 is smaller than the diameter of the annular shell 221. The bottom surface of the annular platform 223 is connected to the threaded column 222, and the end of the connecting column 212 is inserted in the annular platform 223 for easy positioning.

[0042] The driving block 214 is disposed on the cylindrical surface of the connecting column 212, with its bottom connected to the connecting platform 213. The following block 224 is disposed within the annular housing 221, with its bottom connected to the annular platform 223. When the power unit 21 is connected to the transmission unit 22, a gap is left between the top of the driving block 214 and the top of the annular platform 223, and a gap is left between the top of the following block 224 and the top of the connecting platform 213. However, when the connecting block 211 rotates, after the driving block 214 rotates a certain distance along the motion path, interference with the following block 224 occurs, driving the following block 224 to move. To facilitate the rotation of the power unit 21, a gap is left between the driving block 214 and the annular housing 221, and a gap is left between the following block 224 and the connecting column 212.

[0043] When the driving block and the following block abut against each other, their side surfaces are aligned. Furthermore, the driving block 214 is configured in a fan-shaped manner. The further away from the power unit 21, the larger the cross-sectional area of ​​the driving block 214. The following block 224 is configured in a fan-shaped manner. The further away from the transmission unit 22, the smaller the cross-sectional area of ​​the following block 224, thereby achieving better drive rotation. Of course, the driving block 214 can also be configured in a trapezoidal or rectangular shape, as long as it satisfies the drive rotation requirement.

[0044] In order to facilitate the connection between the power unit 21 and the transmission unit 22 , a guide slope is provided on a side of the connecting block 211 close to the annular housing 221 .

[0045] A first motor hole 215 is provided on the power part 21, and the first motor hole 215 passes through the connecting block 211, the connecting platform 213 and the connecting column 212. A second motor hole 225 is provided on the transmission part 22, and the second motor hole 225 passes through the annular shell 221, the annular platform 223 and the threaded column 222. The diameter of the second motor hole 225 is larger than the diameter of the first motor hole 215. When the power part 21 is connected to the transmission part 22, the first motor hole 215 and the second motor hole 225 are coaxially arranged. A motor shaft 11 is provided on the motor 1. When the motor 1 is connected to the power part 21, the motor shaft 11 passes through the first motor hole 215 and extends into the second motor hole 225 at the same time, so as to prevent one end of the transmission part 22 from shaking and failing to transmit well. Furthermore, a bell mouth is provided on the side of the first motor hole 215 away from the second motor hole 225 . The closer the bell mouth is to the first motor hole 215 , the smaller the opening is, thereby guiding the motor shaft 11 and facilitating the connection between the motor shaft 11 and the power unit 21 .

[0046] To ensure that the motor 1 can drive the power unit 21 to rotate, the motor shaft 11 is fixedly connected to the power unit 21. In this solution, the motor shaft 11 is interference fit with the first motor hole 215. When the motor shaft 11 rotates, the power unit 21 rotates synchronously, but there is a gap between the motor shaft 11 and the second motor hole 225, that is, the transmission unit 22 does not rotate with the motor 1.

[0047] A boss 23 is provided on one side of the power unit 21 close to the motor 1 , and the bell mouth is provided on the boss 23 to better connect the shaft of the motor 1 with the power unit 21 , thereby protecting the power unit 21 and preventing wear.

[0048] The working principle of the anti-blocking structure is as follows:

[0049] During normal operation, the motor 1 is started, the motor shaft 11 starts to rotate, driving the power unit 21 to rotate forward, and the driving block 214 follows and rotates along the motion path until it contacts the following block 224, and drives the transmission unit 22 to rotate forward, and the transmission unit 22 synchronously drives the worm gear 3 to rotate; when the worm gear 3 and the worm 2 are self-locked, the motor 1 is reversed, synchronously driving the power unit 21 to reverse, the driving block 214 rotates along the motion path, and contacts the following block 224 after rotating a certain distance, hitting the following block, and the following block rotates a little distance within the motion path, and the transmission unit 22 also follows and rotates a certain distance, synchronously driving the worm gear 3 to rotate a certain distance in the opposite direction, and releasing the self-locking. After releasing the self-locking, the motor 1 starts to rotate forward and resumes normal working state;

[0050] In the existing structure, when the worm wheel 3 and the worm 2 are self-locked, the worm cannot rotate, so the self-locking cannot be released. In this solution, the rotation of the driving block 214 will generate a motion path, and the following block 224 is also located in the motion path. Therefore, when the worm wheel 3 and the worm 2 are self-locked, the power unit 21 still has a distance that can be rotated, which can drive the worm 2 to rotate and release the self-locking.

[0051] An electric energy meter with a built-in load switch 5, such as Figure 10 、 Figure 11 As shown, it includes a shell 53, an opening and closing assembly 52 arranged in the shell 53, a reset member connected to the opening and closing assembly 52, a clutch cam member 51 driving the opening and closing assembly 52 to rotate, an anti-jamming structure 4 of the built-in load switch of the electric energy meter driving the clutch cam member 51 to rotate, a first connecting plate and a second connecting plate arranged on the shell 53, an arc extinguishing assembly is provided between the first connecting plate and the second connecting plate, and the arc extinguishing assembly is arranged in the shell 53.

[0052] The utility model mainly designs an anti-jamming structure of a built-in load switch of an electric energy meter and a built-in load switch of an electric energy meter, a driving block 214 is set on the power unit 21, and a following block 224 is set on the transmission unit 22. When the power unit 21 rotates, the driving block 214 drives the following block 224 to rotate. When the worm wheel 3 and the worm 2 are self-locked, the power unit 21 rotates in the opposite direction. The driving block 214 contacts the following block 224 after rotating a certain distance along the motion path, and gives the transmission unit 22 a force to rotate in the opposite direction, so that the worm wheel 3 and the worm 2 are released from self-locking; a positioning space is formed by arranging a connecting platform 213 and an annular platform 223, which facilitates positioning when the power unit 21 is connected to the transmission unit 22, making the transmission more accurate.

[0053] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the scope of protection of the present invention.

[0054] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

[0055] In addition, the various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.

Claims

1. An anti-locking structure for an electric energy meter with a built-in load switch, characterized by: The invention comprises a worm (2) and a worm wheel (3) meshing with the worm (2); the worm (2) comprises a power part (21) and a transmission part (22) connected to the power part (21); the transmission part (22) meshes with the worm wheel (3); A driving block (214) is provided on the power part (21), and a following block (224) is provided on the transmission part (22). The driving block (214) rotates following the power part (21) and forms a motion path. The following block (224) is provided in the motion path. When the worm wheel (3) and the worm (2) are self-locked, the power unit (21) rotates in reverse, and the driving block (214) moves along the motion path until the following block (224) is driven to rotate, thereby synchronously driving the transmission unit (22) to rotate; The power unit (21) includes a connecting block (211) and a connecting column (212) arranged on the connecting block (211); the driving block (214) is arranged on the cylindrical surface of the connecting column (212); The transmission part (22) includes an annular housing (221) and a threaded column (222) connected to the annular housing (221); the follower block (224) is arranged in the annular housing (221); and the threaded column (222) is engaged with the worm gear (3); The connecting column (212) is inserted into the annular housing (221) and can rotate within the annular housing (221).

2. The anti-locking structure of the built-in load switch of the electric energy meter according to claim 1 is characterized in that: When the driving block (214) and the following block (224) are in contact, the two opposite side surfaces fit together.

3. The anti-locking structure of the built-in load switch of the electric energy meter according to claim 1 is characterized in that: A connecting groove is provided on the connecting block (211), and the end of the annular shell (221) is inserted into the connecting groove outside the connecting column (212).

4. The anti-locking structure of the built-in load switch of the electric energy meter according to claim 3 is characterized in that: The end of the connecting column (212) extends radially outward to form a connecting platform (213). The connecting platform (213) is arranged at one end of the connecting column (212) close to the connecting block (211). The connecting platform (213) is arranged in a connecting groove. The end of the annular shell (221) is inserted into the connecting groove outside the connecting platform (213).

5. The anti-locking structure of the built-in load switch of the electric energy meter according to claim 4 is characterized in that: An annular platform (223) is formed by radially extending inward in the annular shell (221). The annular platform (223) is arranged at one end of the annular shell (221) close to the threaded column (222), and the end of the connecting column (212) is inserted into the annular platform (223).

6. The anti-locking structure of the built-in load switch of the electric energy meter according to claim 1, characterized in that: A motor (1) is provided on a side of the power part (21) away from the transmission part (22), and a motor shaft (11) is provided on the motor (1); A first motor hole (215) is provided on the power part (21), and a second motor hole (225) is provided on the transmission part (22). The first motor hole (215) and the second motor hole (225) are coaxially arranged. The diameter of the second motor hole (225) is smaller than the diameter of the first motor hole (215). The motor shaft (11) passes through the first motor hole (215) and extends into the second motor hole (225).

7. The anti-locking structure of the built-in load switch of the electric energy meter according to claim 6, characterized in that: A bell mouth is provided on a side of the first motor hole (215) away from the second motor hole (225).

8. The anti-locking structure of the built-in load switch of the electric energy meter according to claim 1 is characterized in that: A boss (23) is provided on one side of the power part (21) close to the motor (1).

9. An electric energy meter with a built-in load switch, characterized in that: The invention comprises an anti-stalling structure of a built-in load switch of an electric energy meter as described in any one of claims 1-8.

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