A linear actuator motor with adjustable stroke

Abstract

This utility model discloses a linear actuator motor with adjustable stroke, relating to the field of motor equipment technology. It includes an actuator box, a lead screw and actuator assembly, a translation adjustment assembly, a limit switch, a screw, and a lead screw nut. In this utility model, the translation adjustment assembly adjusts the position of the limit switch inside the actuator box, thereby adjusting the stroke of the linear actuator motor. The rotation of the screw in the translation adjustment assembly drives the lead screw nut to move linearly along the screw, which in turn drives the limit switch to move linearly along the screw. This allows for position adjustment of the limit switch, and consequently, stroke adjustment of the linear actuator motor. Each rotation of the screw causes the lead screw nut to move the limit switch linearly by one screw pitch. The screw pitch can be selected according to actual needs, effectively ensuring the position adjustment accuracy of the limit switch, and thus ensuring the stroke adjustment accuracy of the linear actuator motor.

Description

Technical Field

[0001] This utility model relates to the field of motor equipment technology, specifically to a linear actuator motor with adjustable stroke. Background Technology

[0002] A linear actuator motor mainly consists of a motor, a push rod, and a control device. After the motor is reduced in speed by gears or worm gears, it drives a pair of lead screws and nuts to move, which can convert the rotational motion of the motor into linear motion. The extension and retraction of the push rod are completed by using the forward and reverse rotation of the motor.

[0003] The stroke adjustment of a linear actuator motor can be performed manually or automatically. Manual adjustment is relatively simple and intuitive. First, locate the limit switch on the electric linear actuator, usually at the end or bottom. Then, adjust the position of the limit switch to change the stop position of the linear actuator, thus adjusting the stroke. Automatic adjustment requires an automatic control system consisting of a PLC controller, encoder, motor, and limit switches. The PLC controller is programmed to read and recognize the encoder's position signal. The stroke of the linear actuator is then adjusted as needed. After setting the desired stroke length in the PLC controller, the limit switches are activated. When the linear actuator reaches the preset stroke length, the limit switches are triggered, stopping the linear actuator's movement. In manual adjustment, the limit switch position needs to be manually adjusted. The accuracy of the limit switch position is not high, resulting in inconsistent stroke adjustment accuracy for the linear actuator motor.

[0004] For example, the patent (CN218868038U) has the above-mentioned problem; it describes that "the sleeve is provided with a sliding groove along the axial direction of the push rod, the sliding groove is provided with a stroke plate, the stroke plate is provided with a limiting element, the nut is provided with a switch contact that triggers the limiting element to restrict the push rod from continuing to move in the current direction... The front pressing block 12 and the rear pressing block 13 can respectively push the front stroke plate 5 and the rear stroke plate 6 in the sleeve 1, thereby realizing the adjustment of the position of the front limiting element 6 and the rear limiting element 9"; In view of the above-mentioned problem that the position accuracy of the manually adjusted limit switch is not high, resulting in the low accuracy of the stroke adjustment of the linear push rod motor, we propose a linear push rod motor with adjustable stroke. Summary of the Invention

[0005] The purpose of this invention is to provide a linear actuator motor with adjustable stroke to solve the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a linear actuator motor with adjustable stroke, comprising a motor body, a gearbox, and an actuator housing. The output end of the motor body is connected to the input end of the gearbox. A lead screw and actuator assembly is horizontally and movably connected inside the actuator housing. The output end of the gearbox is fixedly connected to one end of the lead screw of the lead screw and actuator assembly. A translation adjustment assembly is horizontally provided inside the actuator housing. The translation adjustment assembly includes a screw rotatably connected to the inner wall of the actuator housing. A lead screw nut is movably fitted onto the outer wall of the lead screw. The lead screw nut is fixedly connected to a limit switch. The lead screw and the lead screw are parallel to each other.

[0007] Furthermore, the translation adjustment assembly also includes a worm gear and a worm, which are meshed and matched. The outer wall of the worm gear is fixedly connected to one end of the screw, and the worm is rotatably connected to the push rod box, with one end of the worm extending to the outside of the push rod box.

[0008] Furthermore, the translation adjustment assembly also includes a wheel handwheel, one end of the worm gear is fixedly connected to the center of the outer wall of the wheel handwheel, and the wheel handwheel is located on the outside of the push rod box.

[0009] Furthermore, the lead screw auxiliary push rod assembly also includes a push rod, one end of which extends to the outside of the push rod box. A second lead screw nut is movably fitted onto the outer wall of the lead screw, and an actuating block is provided on the outer wall of the second lead screw nut. The end of the lead screw away from the push rod is rotatably connected to the inner wall of the push rod box.

[0010] Furthermore, a sleeve is fitted onto the outer side of the lead screw at one end of the push rod's outer wall, and the sleeve is fixedly connected to the outer wall of the lead screw nut.

[0011] Furthermore, the inner wall of the push rod box is provided with a guide groove 1 that matches the lead screw nut 1, and the inner wall of the push rod box is provided with a guide groove 2 that matches the lead screw nut 2. Both the guide groove 1 and the guide groove 2 are parallel to the lead screw.

[0012] Compared with the prior art, the beneficial effects achieved by this utility model are:

[0013] 1. This utility model comprises a push rod box, a lead screw pair push rod assembly, a translation adjustment assembly, a limit switch, a screw, and a lead screw nut. The translation adjustment assembly, located inside the push rod box, adjusts the position of the limit switch, thereby adjusting the stroke of the linear push rod motor. The screw and lead screw nut in the translation adjustment assembly form a lead screw pair assembly. Rotation of the screw drives the lead screw nut to move linearly along the screw, which in turn drives the limit switch to move linearly along the screw. This allows for position adjustment of the limit switch, and consequently, stroke adjustment of the linear push rod motor. Each rotation of the screw causes the lead screw nut to move the limit switch linearly by one screw pitch. The screw pitch can be selected according to actual needs, effectively ensuring the position adjustment accuracy of the limit switch, and thus ensuring the stroke adjustment accuracy of the linear push rod motor.

[0014] 2. In this utility model, when the translation adjustment component is used, the worm gear can be rotated for adjustment. The worm gear meshes with the worm wheel, driving the worm wheel to rotate. The screw rotates with the worm wheel, and the screw and lead screw nut cooperate for transmission, driving the lead screw nut to move linearly. The lead screw nut drives the limit switch to move linearly. By adjusting the direction of the worm gear's rotation, the direction of the limit switch's linear movement can be adjusted, thereby achieving linear reciprocating adjustment of the limit switch inside the push rod box. By using the worm gear and worm wheel to drive the screw to rotate, one rotation of the worm gear corresponds to one tooth pitch of rotation, allowing for precise control and adjustment of the number of rotations of the screw. This further improves the position adjustment accuracy of the limit switch, thereby improving the stroke adjustment accuracy of the linear push rod motor. Attached Figure Description

[0015] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the translation adjustment component of this utility model;

[0018] Figure 3 This is a partial schematic diagram of the translation adjustment component of this utility model;

[0019] Figure 4 This is a schematic diagram of the structure of the lead screw pair push rod assembly of this utility model;

[0020] In the diagram: 1. Motor body; 2. Gearbox; 3. Push rod box; 4. Lead screw and push rod assembly; 401. Lead screw; 402. Push rod; 403. Lead screw nut II; 404. Sleeve; 405. Actuating block; 5. Limit switch; 6. Translation adjustment assembly; 601. Screw; 602. Lead screw nut I; 603. Worm gear; 604. Worm; 605. Handwheel. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figures 1-4 This utility model provides a technical solution: a linear actuator motor with adjustable stroke, comprising a motor body 1, a gearbox 2, and an actuator housing 3. The output end of the motor body 1 is connected to the input end of the gearbox 2. A lead screw and actuator assembly 4 is horizontally and movably connected inside the actuator housing 3. The output end of the gearbox 2 is fixedly connected to one end of the lead screw 401 of the lead screw and actuator assembly 4. A translation adjustment assembly 6 is horizontally provided inside the actuator housing 3. The translation adjustment assembly 6 includes a screw 601 rotatably connected to the inner wall of the actuator housing 3. A lead screw nut 602 is movably fitted onto the outer wall of the screw 601. The lead screw nut 602 is fixedly connected to a limit switch 5. The screw 601 and the lead screw 401 are parallel to each other. The translation adjustment assembly 6 also includes a worm gear. The screw 601 and worm gear 604 are meshed and matched. The outer wall of the worm gear 603 is fixedly connected to one end of the screw 601. The worm gear 604 is rotatably connected to the push rod box 3, and one end of the worm gear 604 extends to the outside of the push rod box 3. The lead screw auxiliary push rod assembly 4 also includes a push rod 402. One end of the push rod 402 extends to the outside of the push rod box 3. A lead screw nut 403 is movably fitted on the outer wall of the lead screw 401. An actuating block 405 is provided on the outer wall of the lead screw nut 403. The end of the lead screw 401 away from the push rod 402 is rotatably connected to the inner wall of the push rod box 3. A sleeve 404 is fitted on the outer side of the lead screw 401 at one end of the outer wall of the push rod 402, and the sleeve 404 is fixedly connected to the outer wall of the lead screw nut 403.

[0023] In one embodiment, the translation adjustment assembly 6 further includes a handwheel 605. One end of the worm gear 604 is fixedly connected to the center of the outer wall of the handwheel 605. The handwheel 605 is located on the outside of the push rod box 3. When the worm gear 604 is rotated, the operation can be performed by rotating the handwheel 605. Alternatively, a servo motor can be used to replace the handwheel 605. The servo motor drives the worm gear 604 to rotate, thereby realizing the position adjustment of the limit switch 5.

[0024] In one embodiment, the inner wall of the push rod box 3 is provided with a guide groove 1 that matches the lead screw nut 602, and the inner wall of the push rod box 3 is provided with a guide groove 2 that matches the lead screw nut 403. Both guide groove 1 and guide groove 2 are parallel to the lead screw 401. The guide groove 1 provides linear guidance for the lead screw nut 602, which can effectively prevent the lead screw nut 602 from rotating and ensure that the lead screw nut 602 drives the limit switch 5 to perform linear displacement adjustment. The guide groove provides linear guidance for the lead screw nut 403, which can effectively prevent the lead screw nut 403 from rotating and ensure that the lead screw nut 403 drives the sleeve 404 and the push rod 402 to perform linear displacement adjustment.

[0025] The working principle of this utility model:

[0026] Refer to the instruction manual appendix Figures 1-4 This utility model, through the arrangement of a push rod box 3, a lead screw pair push rod assembly 4, a translation adjustment assembly 6, a limit switch 5, a screw 601, and a lead screw nut 602, allows the motor body 1 to drive the lead screw pair push rod assembly 4 inside the push rod box 3 to perform linear motion via a gearbox 2. The output end of the gearbox 2 drives one end of the lead screw 401 to rotate, and the lead screw 401 drives the push rod 402 to perform linear motion via the lead screw pair. The translation adjustment assembly 6 adjusts the position of the limit switch 5 inside the push rod box 3, thereby adjusting the stroke of the linear push rod motor. The screw 601 in the translation adjustment assembly 6 and... The lead screw and nut 602 together form a lead screw assembly. The rotation of the screw 601 drives the lead screw and nut 602 to move linearly along the screw 601. The lead screw and nut 602 drives the limit switch 5 to move linearly along the screw 601, which can realize the position adjustment of the limit switch 5, and thus realize the stroke adjustment of the linear actuator motor. For each rotation of the screw 601, the lead screw and nut 602 drive the limit switch 5 to move linearly by one pitch. The pitch can be selected according to actual needs, which can effectively ensure the position adjustment accuracy of the limit switch 5, and thus ensure the stroke adjustment accuracy of the linear actuator motor.

[0027] When the translation adjustment component 6 is in use, the worm 604 can be rotated for adjustment. The worm 604 meshes with the worm wheel 603, driving the worm wheel 603 to rotate. The screw 601 rotates with the worm wheel 603. The screw 601 cooperates with the lead screw nut 602 for transmission, driving the lead screw nut 602 to move linearly. The lead screw nut 602 drives the limit switch 5 to move linearly. By adjusting the rotation direction of the worm 604, the direction of the linear movement of the limit switch 5 can be adjusted, thereby realizing the linear reciprocating adjustment of the limit switch 5 inside the push rod box 3. By using the worm 604 and worm wheel 603 to drive the screw 601 to rotate, one rotation of the worm 604 corresponds to one tooth pitch of rotation of the worm wheel 603. This allows for precise control and adjustment of the number of rotations of the screw 601, further improving the position adjustment accuracy of the limit switch 5, and thus improving the stroke adjustment accuracy of the linear push rod motor.

[0028] When the lead screw and push rod assembly 4 is working, the output end of the gearbox 2 drives the lead screw 401 to rotate. The lead screw 401 and the lead screw nut 403 work together to form the lead screw assembly. During the rotation of the lead screw 401, the lead screw nut 403 moves linearly along the lead screw 401. By adjusting the rotation direction of the lead screw 401, the linear movement direction of the lead screw nut 403 can be adjusted. The lead screw nut 403 drives the push rod 402 to reciprocate linearly through the sleeve 404. At the same time, the actuating block 405 reciprocates linearly with the lead screw nut 403. When the actuating block 405 contacts the limit switch 5, the limit switch 5 can cut off the power to the motor body 1 to stop it from working, thereby stopping the linear movement of the push rod 402. The limit switch 5, together with another limit switch located at the end of the inner wall of the push rod box 3, can limit the stroke range of the push rod 402.

[0029] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A stroke-adjustable linear push rod motor comprising a motor body (1), a gear box (2) and a push rod box (3), characterized in that: The output end of the motor body (1) is connected to the input end of the gearbox (2). The push rod box (3) is horizontally provided with a movable screw pair push rod assembly (4). The output end of the gearbox (2) is fixedly connected to one end of the screw (401) of the screw pair push rod assembly (4). The push rod box (3) is horizontally provided with a translation adjustment assembly (6). The translation adjustment assembly (6) includes a screw (601) rotatably connected to the inner wall of the push rod box (3). The outer wall of the screw (601) is movably fitted with a screw nut (602). The screw nut (602) is fixedly connected to the limit switch (5). The screw (601) and the screw (401) are parallel to each other.

2. A stroke-adjustable linear push rod motor according to claim 1, characterized in that: The translation adjustment assembly (6) also includes a worm gear (603) and a worm (604). The worm gear (603) and the worm (604) are meshed and matched. The outer wall of the worm gear (603) is fixedly connected to one end of the screw (601). The worm (604) is rotatably connected to the push rod box (3), and one end of the worm (604) extends to the outside of the push rod box (3).

3. A stroke-adjustable linear push rod motor according to claim 2, characterized in that: The translation adjustment assembly (6) also includes a wheel handwheel (605), one end of the worm gear (604) is fixedly connected to the center of the outer wall of the wheel handwheel (605), and the wheel handwheel (605) is located on the outside of the push rod box (3).

4. The stroke-adjustable linear push rod motor according to claim 1, characterized in that: The lead screw and push rod assembly (4) also includes a push rod (402), one end of which extends to the outside of the push rod box (3). The outer wall of the lead screw (401) is fitted with a lead screw nut (403), and the outer wall of the lead screw nut (403) is provided with an actuating block (405). The end of the lead screw (401) away from the push rod (402) is rotatably connected to the inner wall of the push rod box (3).

5. A stroke-adjustable linear push rod motor according to claim 4, characterized in that: One end of the outer wall of the push rod (402) is fitted with a sleeve (404) on the outside of the lead screw (401), and the sleeve (404) is fixedly connected to the outer wall of the lead screw nut (403).

6. A stroke-adjustable linear push rod motor according to claim 4, characterized in that: The inner wall of the push rod box (3) is provided with a guide groove 1 that matches the lead screw nut 1 (602), and the inner wall of the push rod box (3) is provided with a guide groove 2 that matches the lead screw nut 2 (403). Both the guide groove 1 and the guide groove 2 are parallel to the lead screw (401).

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