Electric push rod with motor resetting function

Abstract

The electric push rod comprises a box body, a first motor, an outer pipe, a push rod assembly and a reset driving mechanism, when the motor breaks down in the retraction process of the push rod assembly, the push rod does not completely retract into the outer pipe, and the reset driving mechanism is connected to the second end of an input shaft; when the reset driving mechanism is started, the first end of the input shaft penetrates into the box body, the reset driving mechanism drives the input shaft to rotate, the second end of the input shaft is transmitted to the push rod assembly through the transmission assembly, and the push rod assembly continues to retract into the outer pipe till the push rod assembly completely retracts into the outer pipe. And a reset driving mechanism is arranged, the emergency adjusting function is provided, the push rod assembly is prevented from being exposed outside and subjected to mechanical collision, and the push rod assembly is protected.

Description

TECHNICAL FIELD

[0001] The utility model relates to electric push rod technical field especially electric push rod with motor reset. BACKGROUND

[0002] The existing electric push rod includes push rod assembly, outer tube, box and motor, the output end of motor rotates and drives to push rod assembly through box, push rod assembly extends or retracts relative to outer tube, if push rod assembly appears the fault in the process of retracting, push rod assembly stops retracting work, push rod does not retract completely in outer tube, push rod exposes outside possibly suffers mechanical collision and external object interference risk etc.

[0003] It should be noted that the information disclosed in the above background section is only used to strengthen the understanding of the background of the present disclosure, and therefore can include information that does not constitute prior art known to those of ordinary skill in the art. SUMMARY

[0004] In view of the deficiencies of the prior art, the utility model discloses electric push rod with motor reset to solve the problem that push rod assembly appears the fault in the process of retracting, push rod assembly stops retracting work, push rod does not retract completely in outer tube, push rod exposes outside possibly suffers mechanical collision and external object interference risk etc.

[0005] The technical scheme adopted by the utility model is as follows:

[0006] Electric push rod with motor reset includes:

[0007] Box

[0008] Driving mechanism, including:

[0009] Transmission assembly, rotatably arranged in the box

[0010] First motor, fixedly arranged on the outside of the box, the input shaft is arranged through the first motor, the first end of the input shaft extends into the box and is connected with the input end of the transmission assembly

[0011] Outer tube, fixedly connected to the outside of the box

[0012] Push rod assembly, slidingly arranged in the outer tube, the first end of the push rod assembly extends into the box and is connected with the output end of the transmission assembly

[0013] The reset driving mechanism has a rotatable output shaft at the first end, the output shaft is connected to the second end of the input shaft and drives the input shaft to rotate, the output shaft is rotated, the output shaft drives the input end of the transmission assembly to rotate, the input end of the transmission assembly drives the output end of the transmission assembly to rotate, and the output end of the transmission assembly drives the push rod assembly to be extended or retracted in the outer tube.

[0014] Further, the reset driving mechanism comprises a shaft coupling and a second motor, the body of the second motor is fixedly arranged relative to the body of the first motor, the second end of the input shaft is clamped to the left end of the shaft coupling, and the second motor is provided with an output shaft which extends out of the left end of the second motor and is clamped to the right end of the shaft coupling.

[0015] Further, the push rod assembly comprises a lead screw, an inner tube and a lead screw nut, the input end of the lead screw extends into and is clamped in the box body, the input shaft is rotated to drive the lead screw to rotate through the box body, the lead screw nut is threadedly connected to the lead screw, the inner tube is fixedly sleeved outside the lead screw nut, the outer side of the lead screw nut is fixedly sleeved with a sliding block, and the inner side of the outer tube is provided with a sliding groove, and the sliding block is clamped into the sliding groove.

[0016] Further, the transmission assembly is a gear set, the gear set is arranged in the box body, the outer tube is fixedly connected to the right lower end of the box body, the first end of the input shaft is connected to an input gear in the gear set, the input end of the push rod assembly is connected to an output gear in the gear set, and the push rod assembly and the motor are driven through the gear set.

[0017] Further, the box body is provided with a power supply interface, and the power supply line of the working power supply is connected to the first motor through the power supply interface.

[0018] Further, the electric push rod with motor reset has four, the four electric push rods with motor reset are connected in parallel to the working power supply through the respective power supply interfaces, and the four first motors synchronously drive the four push rod assemblies to extend or retract.

[0019] Further, the push rod assembly further comprises a front pull head, and the left end of the front pull head is threadedly connected to the right end of the inner tube.

[0020] Further, the box body further comprises a rear pull head, and the right end of the rear pull head is threadedly connected to the left end of the box body.

[0021] The beneficial effects of the embodiments of the utility model are as follows:

[0022] The electric push rod with motor reset comprises a box body, a first motor, an outer pipe, a push rod assembly and a reset driving mechanism.

[0023] Further, the push rod assembly further comprises a front pull head, the left end of the front pull head being threadedly connected to the right end of the inner pipe, and the box body further comprises a rear pull head, the right end of the rear pull head being threadedly connected to the left end of the box body, the rear pull head being mounted on a fixed component, the front pull head being connected to a movable component, the front pull head being connected to the movable component and transmitting a pushing force to the movable component, and the rear pull head providing support through the connection of the fixed component, so as to ensure the stability and accuracy of the push rod assembly.

[0024] Further, the electric push rod with motor reset has four, the four electric push rods with motor reset are connected in parallel through respective power supply interfaces and work on a power supply, the four first motors synchronously drive the four push rod assemblies to extend or retract respectively, and when the four push rod assemblies work in parallel, they coordinate with each other, so as to reduce the risk of imbalance of the system, the four electric push rods can be connected in parallel through one power supply, so as to ensure that each push rod assembly performs the same action at the same time, each push rod shares a part of the load, the pressure and the pushing force required by each push rod are distributed, mechanical instability caused by uneven work of the push rod is avoided, and the efficiency of the entire push rod system during work is improved. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a front view structural schematic diagram of the first embodiment of the utility model.

[0026] Figure 2 It is a transverse structure schematic diagram of the first embodiment of the utility model.

[0027] Figure 3 It is a normal state schematic diagram of the second embodiment of the utility model.

[0028] Figure 4 It is a fault state schematic diagram of the second embodiment of the utility model.

[0029] In the drawing:

[0030] 1, box; 2, the first motor; 3, outer tube; 4, push rod assembly; 41, screw rod; 42, inner tube; 43, screw nut; 44, sliding block; 45, front pull head; 5, reset drive mechanism; 51, shaft coupling; 52, the second motor; 53, output shaft; 6, input shaft; 7, working power supply; 8, gear set; 9, power supply interface; 10, rear pull head. DETAILED DESCRIPTION

[0031] The specific embodiments of the present application will be described below with reference to the accompanying drawings.

[0032] In order to make the purpose, technical scheme and advantages of the present application more clear, the device proposed by the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments. According to the following description, the advantages and features of the present application will be more clear. It should be noted that the drawings are greatly simplified and all use non-precise proportions, only to facilitate and clarify the purpose of assisting the description of the embodiments of the present application. In order to make the purpose, features and advantages of the present application more obvious and easy to understand, please refer to the accompanying drawings. It should be noted that the structure, proportion, size and the like shown in the drawings attached to the present application are only used to cooperate with the content disclosed in the specification, so that those skilled in the art can understand and read, and are not used to limit the conditions of the implementation of the present application, so they do not have the technical essence, any modification of the structure, change of the proportion relationship or adjustment of the size, as long as it does not affect the effect and purpose that can be achieved by the present application, it should still fall within the scope of the technical content disclosed by the present application.

[0033] First embodiment:

[0034] The first embodiment discloses an electric push rod with motor reset.

[0035] Figure 1 It is a front view structural schematic diagram of the first embodiment of the present application. Figure 2 It is a cross-sectional structural schematic diagram of the first embodiment of the present application. As shown in Figures 1-2 The electric push rod with motor reset includes box 1, drive mechanism, outer tube 3, push rod assembly 4 and reset drive mechanism 5, the drive mechanism includes transmission assembly and first motor 2, the transmission assembly is rotatably arranged in the box 1, the first motor 2 is fixedly arranged on the outer side of the box 1, the input shaft 6 is arranged through the first motor 2, the first end of the input shaft 6 extends into the box 1 and is connected with the input end of the transmission assembly, the second end of the input shaft 6 extends out of the right end of the first motor 2, the outer tube 3 is fixedly connected to the outer side of the box 1, the push rod assembly 4 is slidably arranged in the outer tube 3, the first end of the push rod assembly 4 extends into the box 1 and is connected with the output end of the transmission assembly.

[0036] The push rod assembly 4 includes a lead screw 41, an inner tube 42 and a lead screw nut 43. The input end of the lead screw 41 extends into and is clamped in the box 1. The input shaft 6 rotates through the box 1 to drive the rotation of the lead screw 41. The lead screw nut 43 is threadedly connected to the lead screw 41. The inner tube 42 is fixedly sleeved on the outside of the lead screw nut 43. The outside of the lead screw nut 43 is fixedly sleeved with a sliding block 44. The inside of the outer tube 3 is provided with a sliding groove. The sliding block 44 is clamped into the sliding groove to prevent the lead screw nut 43 from rotating with the lead screw 41 when the lead screw 41 rotates.

[0037] As shown in Figure 2 , the first end of the reset driving mechanism 5 has a rotatable output shaft 53 connected to the second end of the input shaft 6 and driving the input shaft 6 to rotate. The input shaft 6 drives the input end of the transmission assembly to rotate, and the input end of the transmission assembly drives the output end of the transmission assembly to rotate, and the output end of the transmission assembly drives the push rod assembly 4 to extend and retract in the outer tube 3. Figure 2 As shown in Figure 2 , the reset driving mechanism 5 includes a shaft coupling 51 and a second motor 52. The body of the second motor 52 is fixedly arranged relative to the body of the first motor 2. For example, the body of the second motor 52 is fixedly arranged on the ground. The second end of the input shaft 6 is clamped to the left end of the shaft coupling 51. The second motor 52 is provided with an output shaft 53 extending out of the left end of the second motor 52 and clamped to the right end of the shaft coupling 51. The second motor 52 is arranged as a backup driving source. When the original first motor 2 fails, the second motor 52 can be started to drive the input shaft 6 to rotate, so that the push rod assembly 4 can still be operated to extend and retract. The shaft coupling 51 is arranged to accurately transmit the power of the second motor 52 to the input shaft 6, ensuring that the push rod assembly 4 can continue to operate, enhancing the redundancy of the system. Even if the first motor 2 fails, the second motor 52 can still be operated to avoid the shutdown of the equipment due to motor failure, improving the overall reliability and stability of the equipment.

[0038] As shown in Figure 1 , further, the box 1 is provided with a power interface 9. The power supply line of the working power supply 7 is connected to the first motor 2 through the power interface 9. The power interface 9 is arranged to connect the working power supply 7 and the first motor 2 to provide power for the system, ensuring that the first motor 2 can obtain stable power supply to maintain the normal extension and retraction of the push rod assembly 4 and ensure the normal operation of the first motor 2.

[0039] As shown in Figure 1As shown, further, the push rod assembly 4 also includes a front pull head 45, the left end of the front pull head 45 is threadedly connected to the right end of the inner tube 42. Further, the box body 1 also includes a rear pull head 10, the right end of the rear pull head 10 is threadedly connected to the left end of the box body 1, the rear pull head 10 is installed on a fixed part, the front pull head 45 is connected to a movable part, the front pull head 45 connects the movable part and transmits the pushing force to the movable part, the rear pull head 10 provides support through the connection of the fixed part, ensures the stability and accuracy of the push rod assembly 4, and the coordinated work of the front pull head 45 and the rear pull head 10 ensures the smooth and accurate movement of the system.

[0040] When the embodiment is in operation:

[0041] When the first motor 2 is in normal operation, the first motor 2 is started, the input shaft 6 is rotated in the forward or reverse direction to drive the input gear in the gear set 8, the output gear is driven to rotate, the lead screw 41 is rotated, the lead screw nut 43 is threadedly displaced to the right relative to the lead screw 41, and the sliding block 44 moves to the right or left together with the inner tube 42.

[0042] When the first motor 2 fails and the inner tube 42 is not completely retracted into the outer tube 3, the second end of the input shaft 6 is clamped to the left end of the coupling 51, the second motor 52 is installed, the body of the second motor 52 is fixedly arranged on the ground, the output shaft 53 is clamped to the right end of the coupling 51, the second motor 52 is started, the output shaft 53 is reversely rotated to drive the input gear to rotate, the gear set 8 is driven to the lead screw 41, the lead screw 41 is rotated, the lead screw nut 43 is threadedly displaced to the left relative to the lead screw 41, and the inner tube 42 is completely retracted into the outer tube 3. After the second motor 52 is turned off, subsequent processing such as disassembly and maintenance is performed.

[0043] In this embodiment, the reset driving mechanism 5 is provided, the second end of the input shaft 6 is clamped and matched with the reset driving mechanism 5, the reset driving mechanism 5 drives the input shaft 6 to continue to rotate, the push rod assembly 4 is completely retracted into the outer tube 3, an emergency adjustment function is provided, the push rod assembly 4 is prevented from being exposed and suffering mechanical collision, and the push rod assembly 4 is protected.

[0044] Second embodiment:

[0045] Based on the first embodiment, the second embodiment further optimizes and refines the number of motor reset electric push rods of the first embodiment.

[0046] In the scene of large-scale movement or synchronous control. For example, in an automatic device or a large mechanical system, multiple electric push rods are required to perform the same action at the same time to achieve efficient operation.

[0047] Figure 3 It is a normal state schematic view of the second embodiment of the utility model. Figure 4 It is a fault state schematic view of the second embodiment of the utility model. AsFigures 3-4 As shown, further, the electric push rod with motor reset has four, the four electric push rods with motor reset work power supply 7 in parallel through the respective power supply interface 9, the four first motors 2 respectively synchronously drive four push rod assemblies 4 to extend or retract, when the four push rod assemblies 4 work in parallel, coordinate with each other, reduce the risk of system imbalance.

[0048] The embodiment works:

[0049] When the four first motors 2 work normally, turn on the working power supply 7, the four input shafts 6 synchronously drive the input gear in the gear set 8 to rotate to drive the output gear to make the lead screw 41 rotate, the lead screw nut 43 generates a threaded displacement to the right relative to the lead screw 41, the slider 44 moves to the right or left together with the inner tube 42, and the four inner tubes 42 synchronously extend or retract.

[0050] When one of the lines fails and the inner tube 42 is not fully retracted into the outer tube 3, the second end of the four input shafts 6 is respectively clamped to the first end of the four couplings 51, the output shaft 53 is clamped to the right end of the coupling 51, and at the same time, the four second motors 52 are started, the output shaft 53 reversely drives the input gear to rotate, which is transmitted to the lead screw 41 by the gear set 8, the lead screw 41 rotates, the lead screw nut 43 generates a threaded displacement to the left relative to the lead screw 41, the inner tube 42 is fully retracted into the outer tube 3, the second motor 52 is turned off, and subsequent processing such as disassembly and maintenance is carried out.

[0051] In this embodiment, four electric push rods are connected in parallel by one working power supply 7, which can ensure that each push rod assembly 4 performs the same action at the same time, each push rod shares a part of the load, so that the pressure and thrust required by each push rod are distributed, avoiding mechanical instability caused by uneven work of the push rod, and improving the efficiency of the entire push rod system during work.

[0052] The technical features of the above-described embodiments can be combined arbitrarily, and in order to make the description simple, not all possible combinations of the technical features in the above-described embodiments are described, however, as long as the combinations of the technical features do not exist contradictory, it should be considered that it is within the scope of the description.

[0053] The above-described embodiments only express several implementation manners of the utility model, the description is more specific and detailed, but it cannot be understood as a limitation on the scope of the utility model patent. It should be pointed out that for ordinary skilled persons in the art, without departing from the concept of the utility model, a number of modifications and improvements can be made, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent should be subject to the appended claims.

Claims

1. An electric linear actuator with motor reset, characterized in that, include: Box (1); The drive mechanism includes: The transmission assembly is rotatably disposed within the housing (1); The first motor (2) is fixedly installed on the outside of the housing (1). The first motor (2) has an input shaft (6) that extends through it. The first end of the input shaft (6) extends into the housing (1) and is connected to the input end of the transmission assembly. The outer tube (3) is fixedly connected to the outside of the box (1); The push rod assembly (4) is slidably disposed inside the outer tube (3), and the first end of the push rod assembly (4) extends into the housing (1) and is connected to the output end of the transmission assembly; The reset drive mechanism (5) has a rotatable output shaft (53) at its first end. The output shaft (53) is connected to the second end of the input shaft (6). Rotating the output shaft (53) drives the input shaft (6) to rotate. The input shaft (6) drives the input end of the transmission assembly to rotate. The input end of the transmission assembly drives the output end of the transmission assembly to rotate. The output end of the transmission assembly drives the push rod assembly (4) to extend and retract within the outer tube (3).

2. The electric push rod with motor reset according to claim 1, characterized in that: The reset drive mechanism (5) includes a coupling (51) and a second motor (52). The body of the second motor (52) is fixed relative to the body of the first motor (2). The second end of the input shaft (6) is engaged with the left end of the coupling (51). The second motor (52) is provided with an output shaft (53). The output shaft (53) extends out of the left end of the second motor (52) and is engaged with the right end of the coupling (51).

3. The electric push rod with motor reset according to claim 1, characterized in that: The push rod assembly (4) includes a lead screw (41), an inner tube (42), and a lead screw nut (43). The input end of the lead screw (41) extends into and is engaged in the housing (1). The input shaft (6) rotates through the housing (1) to drive the lead screw (41) to rotate. The lead screw nut (43) is threaded onto the lead screw (41). The inner tube (42) is fixedly sleeved on the outside of the lead screw nut (43). A slider (44) is fixedly sleeved on the outside of the lead screw nut (43). A groove is opened on the inner side of the outer tube (3), and the slider (44) is engaged in the groove.

4. The electric push rod with motor reset according to claim 1, characterized in that: The transmission component is a gear set (8), which is mounted inside the housing (1). The outer tube (3) is fixedly connected to the lower right side of the housing (1). The first end of the input shaft (6) is connected to the input gear in the gear set (8), and the input end of the push rod assembly (4) is connected to the output gear in the gear set (8). The push rod assembly (4) and the first motor (2) are driven by the gear set (8).

5. The electric push rod with motor reset according to claim 1, characterized in that: The outer side of the housing (1) is provided with a power interface (9), and the power cord of the working power supply (7) is connected to the first motor (2) through the power interface (9).

6. The electric push rod with motor reset according to claim 5, characterized in that: There are four electric push rods with motor reset. The four electric push rods with motor reset are connected in parallel to the working power supply (7) through their respective power interfaces (9). The four first motors (2) synchronously drive the four push rod assemblies (4) to extend or retract.

7. The electric push rod with motor reset according to claim 3, characterized in that: The push rod assembly (4) also includes a front pull head (45), the left end of which is threaded to the right end of the inner tube (42).

8. The electric push rod with motor reset according to claim 1, characterized in that: The housing (1) also includes a rear pull head (10), the right end of which is threaded to the left end of the housing (1).

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