Straight-stroke electric actuating mechanism

Abstract

The utility model discloses a straight stroke electric actuating mechanism, which is characterized in that the straight stroke electric actuating mechanism comprises an upper shell, a lower shell, a motor fixing plate arranged on the lower shell, a motor fixed on the motor fixing plate, motor teeth arranged on a motor shaft, and an intermediate gear meshed with the motor gear, the gear shaft is fixed on a central hole of the intermediate gear, the main gear is meshed with the gear shaft, the nut is arranged on a central hole of the main gear, the support is fixed on the lower shell, the lead screw is arranged in a square hole of the support, matched with internal threads of the nut and provided with a square shaft, and the O-shaped rubber ring is arranged in a circular groove in the side wall of the square hole of the support. When the motor rotates, the motor gear, the intermediate gear, the gear shaft, the main gear and the nut are driven to rotate, the support square hole limits axial rotation of the lead screw, the axial rotation of the nut drives the lead screw to move up and down, and linear operation of the straight-stroke electric execution structure is achieved.

Description

Technical field:

[0001] The utility model belongs to the field of electric actuators, in particular to a linear travel electric actuator. Background technology:

[0002] The existing linear electric actuator has the following disadvantages: 1. The existing linear electric actuator uses a slider to position the lead screw. The slider is installed inside the actuator or slotted on the bracket, and the pin fixed on the lead screw moves axially in the slot of the bracket. This method of lead screw installation is complicated, occupies a large mechanical space, and is costly. 2. The existing linear electric actuator has large friction resistance and low efficiency. Utility model content:

[0003] The purpose of the utility model is to provide a linear electric actuator with simple structure, high efficiency and reliable operation, thus overcoming the shortcomings and deficiencies of the existing common linear electric actuators.

[0004] In order to achieve the above-mentioned purpose, the technical scheme of the utility model is: a linear electric actuator, comprising an upper housing, a lower housing, a motor fixing plate mounted on the lower housing, a motor fixed on the motor fixing plate, motor teeth mounted on the motor shaft, an intermediate gear meshing with the motor gear, a gear shaft fixed on the center hole of the intermediate gear, a main gear meshing with the gear shaft, a nut mounted on the center hole of the main gear, a bracket fixed on the lower housing, a lead screw mounted on a square hole of the bracket and cooperating with the internal thread of the nut and provided with a square shaft, and an O-type rubber ring mounted in a circular groove on the side wall of the square hole of the bracket.

[0005] According to the utility model, the following effects can be achieved:

[0006] When the electric actuator is powered on, the motor drives the motor gear, intermediate gear, gear shaft, main gear and nut to rotate. The square hole of the bracket limits the radial rotation of the lead screw. The radial rotation of the nut drives the lead screw to move up and down, realizing the linear operation of the linear travel electric actuator structure. Description of the drawings:

[0007] Figure 1 This is a schematic diagram of the structure of the utility model

[0008] Figure 2 This is the exploded diagram of the utility model structure

[0009] Figure 3 This is a schematic diagram of the screw and bracket structure in the utility model

[0010] Figure 4 This is the appearance diagram of the structure of the utility model

[0011] exist Figure 1Among them, 1 is the motor, 2 is the reduction box, 3 is the lower housing, 4 is the motor gear, 5 is the intermediate gear, 6 is the gear shaft, 7 is the bracket, 8 is the lead screw, 9 is the O-type rubber ring, 10 is the main gear, 11 is the nut, and 12 is the motor fixing plate.

[0012] exist Figure 2 Among them, 1 is the motor, 2 is the reduction box, 3 is the lower housing, 4 is the motor gear, 5 is the intermediate gear, 6 is the gear shaft, 7 is the bracket, 8 is the lead screw, 9 is the O-type rubber ring, 10 is the main gear, 11 is the nut, 12 is the motor fixing plate, 13 is the upper housing, 14 is the motor gear bearing, 15 is the gear shaft upper bearing, 16 is the gear shaft lower bearing, 17 is the bracket bearing, 18 is the nut lower bearing, and 19 is the nut upper bearing.

[0013] exist Figure 3 In the figure, 7 is a bracket, 8 is a lead screw, and 9 is an O-type rubber ring.

[0014] exist Figure 4 This is the appearance diagram of the linear electric actuator of the utility model. Specific implementation method:

[0015] The utility model is described in detail below with reference to the accompanying drawings:

[0016] The utility model discloses a linear electric execution structure, comprising an upper shell 13, a lower shell 3, a motor fixing plate 12 installed on the lower shell, a motor 1 fixed on the motor fixing plate, a motor gear 4 installed on the motor shaft, an intermediate gear 5 meshing with the motor gear, a gear shaft 6 fixed on the center hole of the intermediate gear, a main gear 10 meshing with the gear shaft, a nut 11 installed on the center hole of the main gear, a bracket 7 fixed on the lower shell, a lead screw 8 installed in a square hole of the bracket and matched with an inner thread of the nut and provided with a square shaft, and an O-type rubber ring 9 installed in a circular groove on the side wall of the square hole of the bracket.

[0017] The following describes in detail how to use the rotation of the motor to achieve the axial linear motion of the screw:

[0018] When the motor (1) rotates forward (clockwise, Figure 2 The direction indicated by the arrow in the middle), driving the motor gear (4) to rotate clockwise ( Figure 2 The middle gear (5) and the gear shaft (6) rotate counterclockwise ( Figure 2 The main gear (10) and the nut (11) rotate clockwise ( Figure 2 The screw (8) moves upward (in the direction indicated by the arrow in the middle). Figure 2 When the motor (1) is reversed (counterclockwise, Figure 2 The opposite direction indicated by the arrow in the middle), driving the motor gear (4) to rotate counterclockwise ( Figure 2 The middle gear (5) and the gear shaft (6) rotate clockwise (the opposite direction of the arrow in the middle). Figure 2 The main gear (10) and the nut (11) rotate counterclockwise (in the opposite direction of the arrow in the middle). Figure 2 The screw (8) moves downward (the opposite direction indicated by the arrow in the middle). Figure 2 in the opposite direction as indicated by the arrow).

Claims

1. A linear electric actuator, characterized in that: The invention comprises an upper shell (13), a lower shell (3), a motor fixing plate (12) mounted on the lower shell, a motor (1) fixed on the motor fixing plate, a motor gear (4) mounted on the motor shaft, an intermediate gear (5) meshing with the motor gear, a gear shaft (6) fixed on the center hole of the intermediate gear, a main gear (10) meshing with the gear shaft, a nut (11) mounted on the center hole of the main gear, a bracket (7) fixed on the lower shell, a lead screw (8) mounted on a square hole of the bracket and matched with the inner thread of the nut and provided with a square shaft, and an O-type rubber ring (9) mounted in a circular groove on the side wall of the square hole of the bracket.

2. A linear electric actuator according to claim 1, characterized in that: The bracket (7) is provided with a square hole, the lead screw (8) is provided with a square shaft, and the square hole of the bracket (7) and the square shaft of the lead screw (8) are matched in a square manner to limit the radial rotation of the lead screw (8).

3. A linear electric actuator according to claim 1, characterized in that: A circular groove is arranged inside the square hole of the bracket (7), and an O-type rubber ring (9) is installed in the circular groove to ensure the sealing between the inside and the outside of the bracket.

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