Dual-function clutch transmission with overload protection

Abstract

The present invention discloses a dual-function clutch transmission device with overload protection function, including a transmission sleeve, a clutch gear, a sliding core and a manual-electric switching mechanism, the transmission sleeve includes a tooth portion, the sliding core is slidably arranged on the inner side of the transmission sleeve, the clutch gear can rotate the sleeve and is arranged on the outer side of the transmission sleeve, a plurality of through holes are distributed on the side wall of the transmission sleeve, a plurality of grooves are arranged on the inner side of the clutch gear, a first annular groove and a second annular groove are arranged on the outer side of the sliding core, an annular flange is formed between the first annular groove and the second annular groove, a steel ball is arranged in each of the through holes, the manual-electric switching mechanism is arranged above the sliding core, a spring is arranged between the lower end of the sliding core and the transmission sleeve, and the spring presses the sliding core against the manual switching mechanism. The present invention has a simple structure, has a manual-electric switching function, can effectively protect the motor in an overload situation, and has higher safety.

Description

Technical Field

[0001] The invention relates to a dual-function clutch transmission device with an overload protection function. Background Art

[0002] The grounding switch used in traditional medium-voltage electrical equipment is usually operated manually, which is not only inefficient but also dangerous. With the advancement of power equipment manufacturing technology, the power supply quality of power equipment has become more and more stable. In order to reduce the workload of substation operation and improve the unattended capability of the power system, an electric operating device has emerged, which includes a motor, a transmission mechanism, and a housing for supporting the motor and the transmission mechanism. The transmission mechanism is used to connect with the operating shaft of the grounding switch. The motor drives the operating shaft of the grounding switch to rotate forward or reverse through the transmission mechanism, thereby realizing the opening and closing operation of the grounding switch. However, this device is prone to damage to the motor when overloaded, which poses certain safety hazards. Summary of the invention

[0003] In view of the deficiencies in the prior art, the present invention provides a dual-function clutch transmission device with an overload protection function, which has a simple structure, can effectively protect the motor in an overload situation, and has higher safety.

[0004] To achieve the above-mentioned purpose, the present invention provides a dual-function clutch transmission device with an overload protection function, including a transmission sleeve, a clutch gear, a sliding core and a manual-electric switching mechanism, the transmission sleeve including a tooth portion, the sliding core is slidably arranged on the inner side of the transmission sleeve, the clutch gear is rotatably sleeved on the outer side of the transmission sleeve, a plurality of through holes are circumferentially distributed on the side wall of the transmission sleeve, a plurality of grooves corresponding to the through holes are arranged on the inner side of the clutch gear, a first annular groove and a second annular groove are arranged on the outer side of the sliding core in sequence from top to bottom, an annular flange is formed between the first annular groove and the second annular groove, a steel ball capable of radial movement is arranged in each of the through holes, and the steel ball is retained in the groove and When the gears are in contact with each other, a transmission connection can be formed between the transmission sleeve and the clutch gear. The manual-electric switching mechanism is arranged above the sliding core and is used to limit the upward position of the sliding core. A spring is arranged between the lower end of the sliding core and the transmission sleeve, and the spring presses the sliding core against the manual switching mechanism. The manual-electric switching mechanism can limit the sliding core to a position where the annular flange corresponds to the through hole or the second annular groove corresponds to the through hole. When the annular flange is in a position corresponding to the through hole, it can keep the steel ball between the through hole and the groove. When overloaded, the steel ball can push the sliding core downward and enter the first annular groove under the interference between the inner wall of the groove and the annular flange.

[0005] The advantages of adopting the above technical solution are: the toothed portion and the clutch gear of the transmission shaft sleeve of the present invention are respectively used for transmission connection with the motor output shaft and the operating shaft of the earthing switch; when the present invention is in the motor driving state, the manual electric switching mechanism limits the sliding core to a position where the annular flange corresponds to the through hole; the annular flange can hold the steel ball between the through hole and the groove, thereby forming a transmission connection between the transmission shaft sleeve and the clutch gear; the motor can drive the operating shaft of the earthing switch to rotate to realize opening and closing; when overloaded, the force exerted by the inner wall of the groove on the steel ball is greater than the force exerted by the annular flange on the steel ball, and the steel ball can The inner wall of the groove contacts and cooperates with the annular flange, thereby pushing the sliding core to move downward and compressing the spring, and the steel ball can enter the first annular groove, thereby disconnecting the transmission connection between the transmission sleeve and the clutch gear, preventing the motor from being overloaded and damaged; when the present invention is in a manual drive state, the manual-electric switching mechanism limits the sliding core to a position corresponding to the second annular groove and the through hole, and when the inner wall of the groove exerts a force on the steel ball, the steel ball will enter the second annular groove, thereby disconnecting the transmission connection between the transmission sleeve and the clutch gear, so that the staff will not drive the motor to rotate when manually driving the operating shaft to rotate. The present invention has a simple structure, a manual-electric switching function, and can quickly cut off the transmission connection between the motor and the operating shaft when overloaded, thereby effectively protecting the motor and preventing the motor from being damaged, and has good safety.

[0006] As a further improvement of the present invention, the manual-electric switching mechanism includes a clamping ring, a push rod and an electromagnetic drive module, the clamping ring is embedded in the upper end of the transmission sleeve and can prevent the sliding core from slipping out upward, the electromagnetic drive module is arranged above the push rod and is used to drive the push rod to move downward, the push rod includes a first resistance part and a second resistance part, wherein the first resistance part is used to resist and cooperate with the upper end of the transmission sleeve, and the second resistance part is used to resist and cooperate with the sliding core, when the electromagnetic drive module is energized, it can drive the sliding core to move downward to a position where the annular flange corresponds to the through hole; when the electromagnetic drive module is powered off, the sliding core moves upward under the action of the spring and resists with the clamping ring, and at the same time, the sliding core is located so that the second annular groove corresponds to the through hole.

[0007] The advantages of adopting the above technical solution are: when the electromagnetic drive module is powered on, it can drive the push rod to move downward and press the push rod downward to a position where the first abutment portion conflicts with the transmission shaft sleeve. Due to the setting of the second abutment portion, the push rod can also push the sliding core downward to a position where the annular flange corresponds to the through hole when moving downward. At this time, the present invention is in an electric drive state; when the electromagnetic drive module is powered off, the sliding core moves upward under the action of the spring and conflicts with the clamping ring, and the push rod also moves upward for a distance under the push of the sliding core. At this time, the sliding core is located at a position where the second annular groove corresponds to the through hole, and the present invention is in a manual drive state. The switching between the manual drive state and the electric drive state of the present invention can be achieved by controlling the power on and off of the electromagnetic drive module.

[0008] As a further improvement of the present invention, the spring includes a first spring and a second spring arranged coaxially, the first spring is continuously pressed between the sliding core and the transmission sleeve, and the second spring is pressed between the sliding core and the transmission sleeve only when overloaded.

[0009] The advantage of adopting the above technical solution is that when overloaded, the first spring and the second spring act on the sliding core at the same time and counteract the force exerted on the steel ball by the inner wall of the slide groove, while in the manual drive state, the sliding core is only supported on the clamping ring by the first spring, so that when the sliding core switches from the manual drive state to the electric drive state, the electromagnetic drive module only needs to overcome the force of the first spring to work, which can reduce the load of the electromagnetic drive module and improve the service life and safety.

[0010] As a further improvement of the present invention, the sliding core includes an axially extending inner hole, the lower end of the push rod is movably inserted into the inner hole, the lower end of the inner hole is provided with a flared opening, and an annular notch is opened at the outer side of the lower end of the sliding core. The first spring is sleeved at the annular notch, and the second spring is sleeved at the lower end of the push rod and inserted into the flared opening.

[0011] The advantage of adopting the above technical solution is that the first spring and the second spring are not easily displaced during operation, thereby improving the stability of the operation.

[0012] As a further improvement of the present invention, the groove is provided with an opening at one end of the clutch gear, and the clutch gear can slide axially along the transmission shaft sleeve.

[0013] The advantage of adopting the above technical solution is that it is easy to install and disassemble the clutch gear and the steel ball. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a structural diagram of an embodiment of the present invention;

[0015] Figure 2 A partial cross-sectional view of an embodiment of the present invention;

[0016] Figure 3 is an axial cross-sectional view of an embodiment of the present invention in a manual driving state;

[0017] Figure 4 is an axial cross-sectional view of an embodiment of the present invention in a motor-driven state;

[0018] Figure 5 is an axial cross-sectional view of an embodiment of the present invention in an overload state;

[0019] Figure 6 for Figure 3 Cross-sectional view of the AA portion. DETAILED DESCRIPTION

[0020] The embodiment of the dual-function clutch transmission device with overload protection function of the present invention is as follows: Figures 1 to 6 As shown: it includes a transmission sleeve 1, a clutch gear 2, a sliding core 3 and a manual-electric switching mechanism, the transmission sleeve 1 includes a tooth portion 11, the sliding core 3 is slidably arranged on the inner side of the transmission sleeve 1, the clutch gear 2 is rotatably sleeved on the outer side of the transmission sleeve 1, a plurality of through holes 12 are circumferentially distributed on the side wall of the transmission sleeve 1, a plurality of grooves 21 corresponding to the through holes 12 are arranged on the inner side of the clutch gear 2, a first annular groove 31 and a second annular groove 32 are arranged on the outer side of the sliding core 3 from top to bottom, an annular flange 33 is formed between the first annular groove 31 and the second annular groove 32, each of the through holes 12 is provided with a steel ball 5 capable of radial movement, and the steel ball 5 can form a transmission sleeve 1 when it is retained between the groove 21 and the through hole 12. The manual-electric switching mechanism 4 is arranged above the sliding core 3 and is used to limit the upward position of the sliding core 3. A spring is arranged between the lower end of the sliding core 3 and the transmission sleeve 1. The spring presses the sliding core 3 against the manual switching mechanism. The manual-electric switching mechanism can limit the sliding core 3 to a position where the annular flange 33 corresponds to the through hole 12 or the second annular groove 32 corresponds to the through hole 12. When the annular flange 33 is in a position corresponding to the through hole 12, it can keep the steel ball 5 between the through hole 12 and the groove 21. When overloaded, the steel ball 5 can push the sliding core 3 downward and enter the first annular groove 31 (such as Figure 5The manual-electric switching mechanism includes a clamping ring 61, a push rod 62 and an electromagnetic drive module. The electromagnetic drive module includes a magnetic block 631 and a coil 632. The clamping ring 61 is embedded at the upper end of the transmission shaft sleeve 1 and can prevent the sliding core 3 from slipping out upward. The electromagnetic drive module is arranged above the push rod 62 and is used to drive the push rod 62 to move downward. The push rod 62 includes a first contact portion 621 and a second contact portion 622, wherein the first contact portion 621 is used to contact and cooperate with the upper end of the transmission shaft sleeve 1, and the second contact portion 622 is used to contact and cooperate with the sliding core 3. When the electromagnetic drive module is energized, it can drive the sliding core 3 to move downward to a position where the annular flange 33 corresponds to the through hole 12 (as shown in FIG. 1 ). Figure 4 When the electromagnetic drive module is powered off, the slide core 3 moves upward under the action of the spring and contacts the collar 61, and the slide core 3 is located so that the second annular groove 32 corresponds to the through hole 12 (as shown in FIG. Figure 3 The spring includes a first spring 71 and a second spring 72 which are coaxially arranged. The first spring 71 is continuously pressed between the slide core 3 and the transmission sleeve 1, and the second spring 72 is pressed between the slide core 3 and the transmission sleeve 1 only when overloaded (as shown in FIG. Figure 3 , 4 , 5). The sliding core 3 includes an inner hole 34 extending axially, the lower end of the push rod 62 is movably inserted into the inner hole 34, the lower end of the inner hole 34 is provided with a flared opening 341, an annular notch 35 is provided at the outer side of the lower end of the sliding core 3, a spring pad 13 is embedded at the lower end of the transmission sleeve 1, the upper end of the first spring 71 is sleeved at the annular notch 35, the upper end of the second spring 72 is sleeved at the lower end of the push rod 62 and inserted in the flared opening 341, and the lower ends of the first spring 71 and the second spring 72 are both against the spring pad 13. The groove 21 is provided with an opening 211 at one end of the clutch gear 2, and the clutch gear 2 can slide axially along the transmission sleeve 1.

[0021] The above example is only one of the preferred specific examples of the present invention. The common changes and substitutions made by those skilled in the art within the scope of the technical solution of the present invention are all included in the protection scope of the present invention.

Claims

1. A dual-function clutch transmission device with overload protection function, comprising a transmission sleeve, a clutch gear, a sliding core and a manual-electric switching mechanism, the transmission sleeve comprising a tooth portion, the sliding core is slidably arranged on the inner side of the transmission sleeve, the clutch gear is rotatably sleeved on the outer side of the transmission sleeve, a plurality of through holes are circumferentially distributed on the side wall of the transmission sleeve, a plurality of grooves corresponding to the through holes are arranged on the inner side of the clutch gear, a first annular groove and a second annular groove are arranged on the outer side of the sliding core in sequence from top to bottom, an annular flange is formed between the first annular groove and the second annular groove, and each of the through holes is provided with a A steel ball capable of radial movement can form a transmission connection between the transmission sleeve and the clutch gear when the steel ball is retained between the groove and the through hole. The manual-electric switching mechanism is arranged above the sliding core and is used to limit the upward position of the sliding core. A spring is provided between the lower end of the sliding core and the transmission sleeve, and the spring presses the sliding core against the manual switching mechanism. The manual-electric switching mechanism can limit the sliding core to a position where the annular flange corresponds to the through hole or the second annular groove corresponds to the through hole. When the annular flange is in a position corresponding to the through hole, it can keep the steel ball between the through hole and the groove. When overloaded, the steel ball can push the sliding core downward and enter the first annular groove under the interference of the inner wall of the groove and the annular flange; the manual-electric switching mechanism includes a clamping ring, a push rod and an electromagnetic drive module, the clamping ring is embedded at the upper end of the transmission shaft sleeve and can prevent the sliding core from slipping out upward, the electromagnetic drive module is arranged above the push rod and is used to drive the push rod to move downward, the push rod includes a first interference part and a second interference part, wherein the first interference part is used to interfere with the upper end of the transmission shaft sleeve, and the second interference part is used to interfere with the sliding core. When the electromagnetic drive module is energized, It can drive the sliding core to move downward to a position where the annular flange corresponds to the through hole; when the electromagnetic drive module is powered off, the sliding core moves upward under the action of the spring and contacts the clamping ring, and at the same time, the sliding core is located at a position where the second annular groove corresponds to the through hole; the spring includes a first spring and a second spring coaxially arranged, the first spring is continuously pressed between the sliding core and the transmission shaft sleeve, and the second spring is pressed between the sliding core and the transmission shaft sleeve only when overloaded; a spring pad is embedded at the lower end of the transmission shaft sleeve, and the lower ends of the first spring and the second spring are both against the spring pad.

2. The dual-function clutch transmission device with overload protection function according to claim 1, characterized in that: The sliding core includes an axially extending inner hole, the lower end of the push rod is movably inserted into the inner hole, the lower end of the inner hole is provided with a flared opening, and an annular notch is opened at the outer side of the lower end of the sliding core. The first spring is sleeved at the annular notch, and the second spring is sleeved at the lower end of the push rod and inserted into the flared opening.

3. The dual-function clutch transmission device with overload protection function according to claim 1 or 2, characterized in that: The groove is provided with an opening at one end of the clutch gear, and the clutch gear can slide axially along the transmission shaft sleeve.

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