Electric push rod device

Abstract

The utility model relates to the technical field of electric drive, in particular to an electric push rod device. Comprising a motor, a worm gear case connected with one end of the motor, a protective cover connected with the opening end of the worm gear case, a sliding block connected with the protective cover in a sliding mode, a guide rail connected with the middle of the sliding block in a sliding mode, a worm gear lead screw shaft parallel to the guide rail, and a mounting base connected with the end, away from the worm gear case, of the protective cover. By arranging the guide rail, the pressure of the sliding block on the worm gear lead screw shaft is reduced, so that the sliding block can do linear motion along the worm gear lead screw shaft more smoothly, and the abrasion of the sliding block on the worm gear lead screw shaft is reduced; the shield arranged between the worm gear case and the mounting base can effectively protect the worm gear lead screw shaft and the guide rail, the worm gear lead screw shaft is prevented from being polluted, and the service life of the electric push rod is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of electric drive, in particular to an electric push rod device. Background Art

[0002] An electric linear actuator is an electrically driven device that converts the rotational motion of a motor into linear reciprocating motion of a push rod. It can be used as an actuator in a variety of simple or complex process flows, enabling remote, centralized, or automated control. The quality of the worm gear shaft in an electric linear actuator significantly impacts its service life. During use, the screw structure guides the slider in linear reciprocating motion, which can easily cause wear and tear on the slider during movement. Furthermore, environmental dirt accumulates on the screw structure over time, increasing resistance between the slider and the screw, which in turn affects the performance of the electric linear actuator. Utility Model Content

[0003] The purpose of the utility model is to address the deficiencies in the prior art and to provide an electric push rod device that can reduce wear and tear while also having a protective effect.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] An electric push rod device is provided, comprising: a motor, a worm gear box connected to one end of the motor, a shield connected to an open end of the worm gear box, a slider slidably connected to the shield, a guide rail slidably connected to the middle part of the slider, a worm gear screw shaft arranged parallel to the guide rail, and a mounting base connected to an end of the shield away from the worm gear box.

[0006] Preferably, the housing of the motor is connected to one end of the worm gear box; a worm is provided at the output end of the motor, and the worm extends into the worm gear box.

[0007] More preferably, one end of the worm gear screw shaft away from the mounting seat extends into the worm gear box, and a front bearing and a worm wheel are sequentially sleeved on the outside of one end of the worm gear screw shaft; the worm wheel is engaged with the worm.

[0008] Preferably, a support member is fixedly connected to the inner wall of the open end of the worm gear box, one end of the guide rail is fixedly connected to the support member, and the other end of the guide rail is fixedly connected to the mounting seat.

[0009] More preferably, the shield includes: an upper shield and a lower shield connected to the bottom end of the upper shield; the ends of the upper shield and the lower shield are respectively connected to the support member and the mounting seat; the slider is sleeved outside the upper shield.

[0010] More preferably, the upper shield is made of plastic.

[0011] Preferably, a rear bearing is provided on the outer sleeve of one end of the worm gear screw shaft close to the mounting seat; the worm gear screw shaft is connected to the mounting seat through the rear bearing.

[0012] Preferably, an external thread is provided on the outer wall of the worm gear screw shaft, and an internal thread matching the external thread is provided on the middle portion of the sliding block.

[0013] Preferably, a limit switch is provided on the side wall of the shield.

[0014] Preferably, the cross-section of the guide rail includes: circular and square.

[0015] The present invention adopts the above technical solution, and compared with the prior art, has the following technical effects:

[0016] 1. The utility model reduces the pressure of the slider on the worm gear screw shaft by providing a guide rail, so that the slider can move linearly along the worm gear screw shaft more smoothly, reducing the wear of the slider on the worm gear screw shaft.

[0017] 2. The protective cover installed between the worm gear box and the mounting base can effectively protect the worm gear screw shaft and guide rail, prevent the worm gear screw shaft from being contaminated, and thus extend the service life of the electric linear actuator.

[0018] 3. The upper shield of the utility model is made of plastic, which saves costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is an exploded view of an electric push rod device in one embodiment of the present utility model;

[0020] Figure 2 This is an exploded view of the electric push rod device in one embodiment of the present invention from another perspective.

[0021] Reference numerals in the figures include:

[0022] Motor 1; worm 11; worm gear box 2; support member 21; slider 3; guide rail 4; worm gear screw shaft 5; front bearing 51; worm wheel 52; rear bearing 53; mounting seat 6; upper shield 7; lower shield 8; limit switch 9. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features therein can be combined with each other.

[0025] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but they are not intended to limit the present invention.

[0026] Example

[0027] This embodiment provides an electric push rod device, comprising: a motor 1, a worm gear box 2 connected to one end of the motor 1, a shield connected to the open end of the worm gear box 2, a slider 3 slidably connected to the shield, a guide rail 4 slidably connected to the middle portion of the slider 3, a worm gear screw shaft 5 arranged parallel to the guide rail 4, and a mounting base 6 connected to the end of the shield away from the worm gear box 2;

[0028] The casing of the motor 1 is connected to one end of the worm gear box 2; a worm 11 is provided at the output end of the motor 1, and the worm 11 extends into the worm gear box 2; the end of the worm gear screw shaft 5 away from the mounting seat 6 extends into the worm gear box 2, and one end of the worm gear screw shaft 5 is sequentially sleeved with a front bearing 51 and a worm wheel 52; the worm wheel 52 is meshed with the worm 11; a rear bearing 53 is provided on the outer sleeve of the end of the worm gear screw shaft 5 close to the mounting seat 6; the worm gear screw shaft 5 is connected to the mounting seat 6 through the rear bearing 53; an external thread is provided on the outer wall of the worm gear screw shaft 5, and an internal thread matching the external thread is provided in the middle of the slider 3; the slider 3 performs linear motion along the guide rail 4 through the movement of the screw;

[0029] A support member 21 is fixedly connected to the inner wall of the open end of the worm gear box 2, one end of the guide rail 4 is fixedly connected to the support member 21, and the other end of the guide rail 4 is fixedly connected to the mounting seat 6; the cross section of the guide rail 4 is circular or square;

[0030] The protective cover includes: an upper protective cover 7 and a lower protective cover 8 connected to the bottom end of the upper protective cover 7; the two ends of the upper protective cover 7 and the lower protective cover 8 are respectively connected to the support member 21 and the mounting seat 6; the slider 3 is sleeved on the outside of the upper protective cover 7; a limit switch 9 is provided on the side wall of the protective cover; the upper protective cover 7 is made of plastic.

[0031] To sum up, the utility model reduces the pressure of the slider on the worm gear shaft by setting a guide rail, so that the slider can move more smoothly along the worm gear shaft in a straight line; the protective cover arranged between the worm gear box and the mounting seat can effectively protect the worm gear shaft and the guide rail, prevent the worm gear shaft from being contaminated, and thus extend the service life of the electric push rod.

[0032] The above description is only a preferred embodiment of the present invention and does not limit the implementation method and protection scope of the present invention. For those skilled in the art, it should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. An electric push rod device, characterized in that: include: A motor (1), a worm gear box (2) connected to one end of the motor (1), a shield connected to the open end of the worm gear box (2), a slider (3) slidably connected to the shield, a guide rail (4) slidably connected to the middle of the slider (3), a worm gear screw shaft (5) arranged parallel to the guide rail (4), and a mounting seat (6) connected to one end of the shield away from the worm gear box (2).

2. The electric push rod device according to claim 1, characterized in that: The housing of the motor (1) is connected to one end of the worm gear box (2); a worm (11) is provided at the output end of the motor (1), and the worm (11) extends into the worm gear box (2).

3. The electric push rod device according to claim 2, characterized in that: One end of the worm gear screw shaft (5) away from the mounting seat (6) extends into the worm gear box (2), and a front bearing (51) and a worm wheel (52) are sequentially sleeved on the outside of one end of the worm gear screw shaft (5); the worm wheel (52) is meshed with the worm (11).

4. The electric push rod device according to claim 1, characterized in that: A support member (21) is fixedly connected to the inner wall of the open end of the worm gear box (2), one end of the guide rail (4) is fixedly connected to the support member (21), and the other end of the guide rail (4) is fixedly connected to the mounting seat (6).

5. The electric push rod device according to claim 4, characterized in that: The shield comprises: an upper shield (7) and a lower shield (8) connected to the bottom end of the upper shield (7); the ends of the upper shield (7) and the lower shield (8) are respectively connected to the support member (21) and the mounting seat (6); and the slider (3) is sleeved outside the upper shield (7).

6. The electric push rod device according to claim 5, characterized in that: The upper shield (7) is made of plastic.

7. The electric push rod device according to claim 1, characterized in that: A rear bearing (53) is provided on the outer sleeve of one end of the worm gear screw shaft (5) close to the mounting seat (6); the worm gear screw shaft (5) is connected to the mounting seat (6) via the rear bearing (53).

8. The electric push rod device according to claim 1, characterized in that: An external thread is provided on the outer wall of the worm gear screw shaft (5), and an internal thread matching the external thread is provided at the middle of the slider (3).

9. The electric push rod device according to claim 1, characterized in that: A limit switch (9) is provided on the side wall of the shield.

10. The electric push rod device according to claim 1, characterized in that: The cross-section of the guide rail (4) includes: circular and square.

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