Compact type heavy-load spiral bevel gear electric push rod

Abstract

The utility model discloses a compact type heavy load spiral bevel gear electric push rod, which is applied to the technical field of electric push rods, and comprises a speed reduction upper box body and a speed reduction lower box body, the speed reduction upper box body is fixedly arranged at the top of the speed reduction lower box body, and one side in the speed reduction upper box body is rotatably connected with a motor driving arc bevel gear; axial force generated by different arc bevel gears during transmission is counteracted through the configuration of the conical roller bearings, and therefore the rigidity of the push rod can be improved. The structure can improve the overall transmission efficiency of the push rod, meanwhile, the partial structure in the reduction gearbox is simplified, and the overall strength is high. The impact resistance is good. And the overall dimension of the electric push rod reduction gearbox body is greatly reduced while the rigidity is high, so that the use requirement of limited space is met. Meanwhile, the reduction gearbox body is easy to machine, low in manufacturing cost and compact in structure, and the push rod is integrally installed more conveniently and rapidly.

Description

Technical Field

[0001] The utility model belongs to the technical field of electric push rods, in particular to a compact heavy-load spiral bevel gear electric push rod. Background Art

[0002] Electric linear actuators are generally composed of a drive motor, reduction gears (or worm gears, synchronous belts), screw pairs (trapezoidal screws, ball screws), push rods, travel control systems (mechanical limit switches, magnetic induction switches, proximity sensors, displacement sensors, encoders, etc.), manual shafts, front and rear joints, etc. Medium and high loads generally use two-stage spur gear reduction transmission to improve transmission efficiency. The disadvantage is that two-stage gear transmission requires additional bearing support for each gear. As a result, the push rod box is relatively large, which is difficult to meet the application conditions of high loads and limited space.

[0003] At present, the reduction box of electric push rods is composed of two-stage spur gear transmission, bearing support on both sides of the gear, and lip seal rings are added on the outside. Therefore, it takes up a lot of space, resulting in a complex reduction box structure and difficult parts processing, which cannot meet the use requirements of limited space. Utility Model Content

[0004] The purpose of the utility model is to provide a compact heavy-load spiral bevel gear electric push rod, which has the advantages of being able to effectively improve the transmission efficiency of the electric push rod, greatly reducing the overall dimensions of the reduction box, simplifying the partial structure of the reduction box, having a compact structure, high mechanical strength, and good overall impact resistance; at the same time, the reduction box body is simple to process and has a low manufacturing cost; due to the compact structure and the internal rear end, the overall installation of the push rod is more convenient.

[0005] The above-mentioned technical purpose of the utility model is achieved through the following technical solutions: a compact heavy-duty spiral bevel gear electric push rod comprises a reduction upper housing and a reduction lower housing, the reduction upper housing is fixedly mounted on the top of the reduction lower housing, one side of the inner part of the reduction upper housing is rotatably connected with a motor active circular arc bevel gear, a secondary active bevel gear is rotatably connected between the reduction upper housing and the reduction lower housing, the surface of the top of the secondary active bevel gear is fixedly sleeved with an input-end driven circular arc bevel gear rotatably connected with the reduction upper housing, the tooth surface of the motor active circular arc bevel gear close to one end inside the reduction upper housing is meshed with the tooth surface of the input-end driven circular arc bevel gear top, the inner part of the reduction lower housing is rotatably connected with a ball screw, the surface of the ball screw is fixedly sleeved with a secondary passive circular arc gear rotatably connected with the reduction lower housing through a keyway, the tooth surface of the bottom surface of the secondary active bevel gear is meshed with the tooth surface of one side of the secondary passive circular arc gear.

[0006] By adopting the above technical solution, the axial force generated by different arc bevel gears during transmission is offset by the configuration of multiple tapered roller bearings, thereby improving the rigidity of the push rod. This structure can improve the overall transmission efficiency of the push rod, while simplifying some structures inside the reduction box, and the overall strength is high. The impact resistance is good. While the high rigidity, the size of the electric push rod reduction box is greatly reduced, thus meeting the use requirements of space constraints. At the same time, the reduction box is simple to process and has a low manufacturing cost. Due to the compact structure and the internal structure, it is more convenient for the overall installation of the push rod.

[0007] The utility model is further configured as follows: a servo motor is installed outside the reduction upper housing, and the servo motor is installed outside the reduction upper housing at a side where the motor driving circular arc bevel gear is away from the input end driven circular arc bevel gear.

[0008] By adopting the above technical solution, by turning on the servo motor, the output end of the servo motor drives the motor's active arc bevel gear to rotate inside the reduction upper housing and engage with the input end's driven arc bevel gear, thereby causing the input end's driven arc bevel gear to rotate inside the reduction upper housing.

[0009] The utility model is further configured as follows: an inner hole keyway is provided inside the motor driving circular arc bevel gear, and the motor driving circular arc bevel gear is fixedly connected to the output end of the servo motor through the inner hole keyway.

[0010] The above technical solution is adopted to increase the stability of the active end transmission.

[0011] The utility model is further configured as follows: both sides of the surface of the motor driving circular arc bevel gear and the surface of the input end driven circular arc bevel gear are fixedly sleeved with roller bearings fixedly connected to the reduction upper housing; the motor driving circular arc bevel gear and the input end driven circular arc bevel gear are rotatably connected to the reduction upper housing inside the reduction upper housing through roller bearings.

[0012] By adopting the above technical solution, the motor driving circular arc bevel gear and the input end driven circular arc bevel gear are integrally fixedly installed inside the reduction upper housing through roller bearings.

[0013] The utility model is further configured as follows: the roller bearings installed on the surfaces of the motor driving circular arc bevel gear and the input end driven circular arc bevel gear are conical roller bearings.

[0014] By adopting the above technical solution, the axial force generated by the motor driving circular arc bevel gear and the input end driven circular arc bevel gear during transmission is offset, thereby further increasing the stability of the driving end transmission.

[0015] The utility model is further configured as follows: the surface of the secondary passive circular arc gear and the end and surface of the ball screw away from the secondary passive circular arc gear are fixedly sleeved with tapered roller bearings fixedly connected to the reduction lower housing; the secondary passive circular arc gear and the ball screw are rotatably connected to the reduction lower housing inside the reduction lower housing through the tapered roller bearings.

[0016] By adopting the above technical solution, the axial force generated by the secondary passive circular arc gear during transmission is offset, the rotation stability of the tapered roller bearing is improved, and the rigidity of the push rod is improved.

[0017] The utility model is further configured as follows: a locking washer used in conjunction with the input-end driven circular arc bevel gear is installed on the top of the secondary active bevel gear, and the input-end driven circular arc bevel gear is fixedly sleeved on the surface of the top of the secondary active bevel gear through the locking washer.

[0018] By adopting the above technical solution, the input-end driven circular arc bevel gear and the secondary active bevel gear are clamped together by using a locking gasket, thereby facilitating disassembly and replacement.

[0019] In summary, the utility model has the following beneficial effects:

[0020] By using multiple tapered roller bearings to offset the axial force generated by different arc bevel gears during transmission, the rigidity of the push rod can be improved. This structure can improve the overall transmission efficiency of the push rod, while simplifying some of the internal structures of the reduction box, and the overall strength is high. Good impact resistance. While the high rigidity, the size of the electric push rod reduction box is greatly reduced, thus meeting the use requirements of limited space. At the same time, the reduction box is simple to process and has low manufacturing cost. Due to the compact structure and internal rear, it is more convenient for the overall installation of the push rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the utility model.

[0022] Figure numerals: 1. Motor driving circular arc bevel gear; 2. Input end driven circular arc bevel gear; 3. Secondary driving bevel gear; 4. Locking gasket; 5. Speed ​​reduction upper housing; 6. Secondary passive circular arc gear; 7. Speed ​​reduction lower housing; 8. Tapered roller bearing; 9. Ball screw. DETAILED DESCRIPTION

[0023] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0024] Embodiment 1:

[0025] refer to Figure 1The compact heavy-duty spiral bevel gear electric push rod comprises a reduction upper housing 5 and a reduction lower housing 7. The reduction upper housing 5 is fixedly mounted on the top of the reduction lower housing 7. One side of the interior of the reduction upper housing 5 is rotatably connected with a motor driving circular arc bevel gear 1. A secondary driving bevel gear 3 is rotatably connected between the reduction upper housing 5 and the reduction lower housing 7. The surface of the top of the secondary driving bevel gear 3 is fixedly sleeved with an input end driven circular arc bevel gear 2 rotatably connected with the reduction upper housing 5. The motor driving circular arc bevel gear 1 is close to the interior of the reduction upper housing 5. The tooth surface at the end meshes with the tooth surface at the top of the driven arc bevel gear 2 at the input end, the internal rotation of the deceleration lower housing 7 is connected with a ball screw 9, the surface of the ball screw 9 is fixedly sleeved with a secondary passive arc gear 6 that is rotationally connected with the deceleration lower housing 7 through a keyway, and the tooth surface at the bottom surface of the secondary active bevel gear 3 meshes with the tooth surface on one side of the secondary passive arc gear 6; by using the configuration of multiple tapered roller bearings to offset the axial force generated by different arc bevel gears during transmission, the rigidity of the push rod can be improved. This structure can improve the overall transmission efficiency of the push rod, while simplifying some structures inside the reduction box, and the overall strength is high. Good impact resistance. While the high rigidity, the outer dimensions of the electric push rod reduction box are greatly reduced, thereby meeting the use requirements of space limitations. At the same time, the reduction box is simple to process and has low manufacturing costs. Due to the compact structure and the internal structure, it is more convenient for the overall installation of the push rod.

[0026] refer to Figure 1 A servo motor is installed outside the reduction upper housing 5. The servo motor is installed outside the reduction upper housing 5 on the side of the motor active circular arc bevel gear 1 away from the input end driven circular arc bevel gear 2. By turning on the servo motor, the output end of the servo motor drives the motor active circular arc bevel gear 1 to rotate inside the reduction upper housing 5 and mesh with the input end driven circular arc bevel gear 2 to make the input end driven circular arc bevel gear 2 rotate inside the reduction upper housing 5.

[0027] refer to Figure 1 An inner hole keyway is provided inside the motor driving circular arc bevel gear 1, and the motor driving circular arc bevel gear 1 is fixedly connected to the output end of the servo motor through the inner hole keyway, thereby increasing the stability of the driving end transmission.

[0028] refer to Figure 1 Both sides of the surface of the motor driving circular arc bevel gear 1 and the surface of the input end driven circular arc bevel gear 2 are fixedly sleeved with roller bearings fixedly connected to the reduction upper housing 5. The motor driving circular arc bevel gear 1 and the input end driven circular arc bevel gear 2 are rotatably connected to the reduction upper housing 5 through roller bearings inside the reduction upper housing 5, so that the motor driving circular arc bevel gear 1 and the input end driven circular arc bevel gear 2 are integrally fixedly installed inside the reduction upper housing 5 through roller bearings.

[0029] refer to Figure 1The roller bearings installed on the surface of the motor driving circular arc bevel gear 1 and the input end driven circular arc bevel gear 2 are tapered roller bearings, which offset the axial force generated by the motor driving circular arc bevel gear 1 and the input end driven circular arc bevel gear 2 during transmission, further increasing the stability of the driving end transmission.

[0030] refer to Figure 1 The surface of the secondary passive circular arc gear 6 and the end and surface of the ball screw 9 away from the secondary passive circular arc gear 6 are fixedly sleeved with a tapered roller bearing 8 fixedly connected to the reduction lower housing 7. The secondary passive circular arc gear 6 and the ball screw 9 are rotatably connected to the reduction lower housing 7 inside the reduction lower housing 7 through the tapered roller bearing 8, which offsets the axial force generated by the secondary passive circular arc gear 6 during transmission, improves the rotation stability of the tapered roller bearing 8, and enhances the rigidity of the push rod.

[0031] refer to Figure 1 A locking washer 4 for use with the input-end driven circular arc bevel gear 2 is installed on the top of the secondary active bevel gear 3. The input-end driven circular arc bevel gear 2 is fixedly sleeved on the surface of the top of the secondary active bevel gear 3 through the locking washer 4. The input-end driven circular arc bevel gear 2 and the secondary active bevel gear 3 are clamped together by the locking washer 4, so as to facilitate disassembly and replacement.

[0032] Brief description of the use process: By turning on the servo motor, the output end of the servo motor drives the motor active circular bevel gear 1 to rotate inside the speed reduction upper housing 5 and mesh with the input end driven circular bevel gear 2, so that the input end driven circular bevel gear 2 is supported by a tapered roller bearing to rotate inside the speed reduction upper housing 5. Then, the input end driven circular bevel gear 2 is fixedly installed with the secondary active bevel gear 3 by means of a locking gasket 4 and drives the secondary active bevel gear 3 to rotate inside the speed reduction upper housing 5 by means of a tapered roller bearing, so that the secondary active bevel gear 3 can mesh with the secondary passive circular arc gear 6. Since the ball screw 9 is fixedly connected with the secondary passive circular arc gear 6 by means of a keyway, the secondary passive circular arc gear 6 will rotate after meshing with the secondary active bevel gear 3 through the support of the tapered roller bearing 8, thereby driving the secondary active bevel gear 3 to rotate inside the speed reduction lower housing 7, so that the ball screw 9 uses the thread bite force to drive the push rod on the surface to move forward. The support of multiple tapered roller bearings is used to offset the axial force generated by different arc bevel gears during transmission, thereby improving the rigidity of the push rod. This structure can improve the overall transmission efficiency of the push rod. At the same time, the lip seal ring structure added to the outside of the reduction box is simplified, which greatly reduces the size of the reduction box.

[0033] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A compact heavy-load spiral bevel gear electric push rod, comprising a reduction upper housing (5) and a reduction lower housing (7), characterized in that: The upper reduction case (5) is fixedly mounted on the top of the lower reduction case (7); one side of the interior of the upper reduction case (5) is rotatably connected with a motor driving circular arc bevel gear (1); a secondary driving bevel gear (3) is rotatably connected between the upper reduction case (5) and the lower reduction case (7); the surface of the top of the secondary driving bevel gear (3) is fixedly sleeved with an input end driven circular arc bevel gear (2) rotatably connected with the upper reduction case (5); the tooth surface of the motor driving circular arc bevel gear (1) close to one end of the interior of the upper reduction case (5) is meshed with the tooth surface of the top of the input end driven circular arc bevel gear (2); the interior of the lower reduction case (7) is rotatably connected with a ball screw (9); the surface of the ball screw (9) is fixedly sleeved with a secondary driven circular arc gear (6) rotatably connected with the lower reduction case (7) through a keyway; the tooth surface of the bottom surface of the secondary driving bevel gear (3) is meshed with the tooth surface of one side of the secondary driven circular arc gear (6).

2. The compact heavy-duty spiral bevel electric linear actuator according to claim 1, characterized in that: A servo motor is installed outside the reduction upper housing (5), and the servo motor is installed outside the reduction upper housing (5) at a side of the motor driving circular arc bevel gear (1) away from the input end driven circular arc bevel gear (2).

3. The compact heavy-duty spiral bevel electric linear actuator according to claim 2, characterized in that: An inner keyway is provided inside the motor driving circular arc bevel gear (1), and the motor driving circular arc bevel gear (1) is fixedly connected to the output end of the servo motor via the inner keyway.

4. The compact heavy-duty spiral bevel electric linear actuator according to claim 1, characterized in that: Both sides of the surface of the motor driving circular arc bevel gear (1) and the surface of the input end driven circular arc bevel gear (2) are fixedly sleeved with roller bearings fixedly connected to the speed reduction upper housing (5).

5. The compact heavy-duty spiral bevel electric linear actuator according to claim 4, characterized in that: The motor driving circular arc bevel gear (1) and the input end driven circular arc bevel gear (2) are both rotatably connected to the speed reduction upper housing (5) via roller bearings inside the speed reduction upper housing (5).

6. The compact heavy-duty spiral bevel electric linear actuator according to claim 4, characterized in that: The roller bearings mounted on the surfaces of the motor driving circular arc bevel gear (1) and the input end driven circular arc bevel gear (2) are conical roller bearings.

7. The compact heavy-duty spiral bevel electric linear actuator according to claim 1, characterized in that: The surface of the secondary passive circular arc gear (6) and the end and surface of the ball screw (9) away from the secondary passive circular arc gear (6) are both fixedly sleeved with a tapered roller bearing (8) fixedly connected to the reduction lower housing (7).

8. The compact heavy-duty spiral bevel electric linear actuator according to claim 7, characterized in that: The secondary passive circular arc gear (6) and the ball screw (9) are both rotatably connected to the deceleration lower housing (7) via a tapered roller bearing (8) inside the deceleration lower housing (7).

9. The compact heavy-duty spiral bevel electric linear actuator according to claim 1, characterized in that: A locking washer (4) for use with the input-end driven circular arc bevel gear (2) is installed on the top of the secondary active bevel gear (3).

10. The compact heavy-duty spiral bevel electric linear actuator according to claim 9, characterized in that: The input-end driven circular arc bevel gear (2) is fixedly sleeved on the top surface of the secondary active bevel gear (3) via a locking gasket (4).

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