Gear transmission electric push rod device

Abstract

The utility model discloses a gear transmission electric push rod device, which comprises a motor, a transmission structure and a telescopic structure, the motor, the transmission structure and the telescopic structure are sequentially connected, the motor is provided with an electric shaft, the transmission structure is provided with a first transmission shaft, a second transmission shaft and a third transmission shaft, the electric shaft is rotatably connected with the first transmission shaft, and the second transmission shaft is rotatably connected with the third transmission shaft. The first transmission shaft, the second transmission shaft and the third transmission shaft are rotationally connected in sequence, the third transmission shaft is rotationally connected with the telescopic structure, the gear is designed in a three-layer stacking mode, the size of the gear box is reduced, when an electric push rod breaks down, the problem can be rapidly located, and the maintenance difficulty and time cost are reduced; due to the structural design of the main shaft and the auxiliary shaft, the transmission ratio of the first transmission shaft, the second transmission shaft and the third transmission shaft is larger than that of a traditional transmission shaft, and the number and the number of stages of gears are reduced under the same gear ratio.

Description

TECHNICAL FIELD

[0001] The utility model belongs to electric push rod field, especially relate to a gear transmission electric push rod device. BACKGROUND

[0002] Electric push rod is based on linear drive technology an application instance, has extensive application in industry, medical treatment and so on many fields. The core component of electric push rod mainly includes motor, telescopic rod and transmission mechanism. Motor is the power source, produces rotation by the drive of electric current, and this power is subsequently transmitted to the precision designed reducer. Transmission mechanism is the key bridge connecting motor and telescopic rod, it converts the rotary motion of motor into the linear motion of telescopic rod through gear, screw or connecting rod and so on mechanical structure, but the transmission mechanism of traditional electric push rod is relatively complex, when electric push rod breaks down, it is often difficult to quickly locate the problem, increase the difficulty and time cost of maintenance, and the transmission mechanism transmission of traditional electric push rod is low, and the use effect is poor. SUMMARY

[0003] In view of the above defects of prior art, the purpose of the utility model is to provide a gear transmission electric push rod device.

[0004] The utility model discloses a gear transmission electric push rod device, including motor, transmission structure and telescopic structure, motor, transmission structure and telescopic structure are connected in proper order, motor is equipped with electric shaft, transmission structure is equipped with first transmission shaft, second transmission shaft and third transmission shaft, electric shaft is connected with the rotation of first transmission shaft, first transmission shaft, second transmission shaft and third transmission shaft are connected in proper order, and third transmission shaft is connected with the rotation of telescopic structure.

[0005] Further, the first transmission shaft is provided with a first auxiliary shaft and a first main shaft, the first auxiliary shaft is arranged above the first main shaft, and the first main shaft is connected with the electric shaft.

[0006] Further, the second transmission shaft is provided with a second auxiliary shaft and a second main shaft, the second auxiliary shaft is arranged above the second main shaft, and the second main shaft is connected with the first auxiliary shaft.

[0007] Further, the second main shaft is further provided with a first recessed ring below, and the first main shaft is partially suspended in the first recessed ring.

[0008] Further, the third transmission shaft is provided with a third main shaft, and the third main shaft is connected with the first auxiliary shaft.

[0009] Further, the third main shaft is further provided with a second recessed ring below, and the second main shaft is partially suspended in the first recessed ring.

[0010] Further, the telescopic structure comprises a telescopic shell and a telescopic assembly, the telescopic shell is wrapped outside the telescopic assembly, and the telescopic assembly comprises a threaded telescopic rod, and the threaded telescopic rod is rotationally connected with the third transmission shaft.

[0011] Further, the transmission structure comprises a transmission shell, and the transmission shell is wrapped outside the first transmission shaft, the second transmission shaft and the third transmission shaft.

[0012] Further, an end cover is arranged on the upper end of the transmission shell, the end cover is provided with a tooth, and the end cover is connected with the transmission shell through the tooth.

[0013] Further, a notch is arranged on the side wall of the end cover, a limiting screw hole is arranged at the corresponding position of the transmission shell, and the end cover further comprises a limiting bolt, the limiting bolt is inserted into the notch through the limiting screw hole.

[0014] Compared with the prior art, the utility model has the advantages of:

[0015] The utility model discloses a first transmission shaft, second transmission shaft and third transmission shaft up-down superposition method, gear three -layer superposition design reduces the gear box size, when electric push rod appears the fault, can position the problem fast, reduces the difficulty and time cost of maintenance. The first transmission shaft, second transmission shaft and third transmission shaft are designed as the main shaft and the auxiliary shaft, so that the transmission ratio of the first transmission shaft, the second transmission shaft and the third transmission shaft is larger than that of the traditional transmission shaft, the number and the number of stages of the gears are reduced under the same gear ratio, the end cover is sleeved on the top of the transmission shell and is connected through the tooth, the space is not occupied, good sealing effect is achieved, and the limiting structure is arranged on the side wall of the end cover, so that the connection is prevented from loosening and the connection stability is improved. ACCURATE DRAWINGS

[0016] Figure 1 It is the overall structure diagram of the utility model;

[0017] Figure 2 It is the sectional view of the utility model;

[0018] Figure 3 It is the transmission structure diagram of the utility model;

[0019] Figure 4 It is the first transmission shaft structure diagram of the utility model;

[0020] Figure 5 It is the second transmission shaft structure diagram of the utility model;

[0021] Figure 6 It is the third transmission shaft structure diagram of the utility model;

[0022] Figure 7 It isFigure 2 Enlarged view at middle P;

[0023] Figure 8 is the overall structure diagram of the end cover of the utility model;

[0024] Figure 9 is the overall structure diagram of the transmission shell of the utility model;

[0025] Figure 10 is the internal structure diagram of the transmission shell of the utility model;

[0026] In the figure: 1, motor; 11, electric shaft; 2, transmission structure; 21, transmission shell; 211, limiting screw hole; 212, connecting block; 213, external thread sleeve; 214, first boss; 215, waterproof groove; 216, matching groove; 22, transmission assembly; 221, first transmission shaft; 2211, first shaft body; 2212, first auxiliary shaft; 2213, first main shaft; 222, second transmission shaft; 2221, second shaft body; 2222, first concave ring; 2223, second main shaft; 2224, second auxiliary shaft; 223, third transmission shaft; 2231, third shaft body; 2232, second concave ring; 2233, third main shaft; 3, telescopic structure; 31, telescopic shell; 32, telescopic assembly; 4, end cover; 41, tooth pattern; 42, notch; 43, limiting bolt. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. For the purpose of clear illustration, many practical details will be described in the following description. However, it should be understood that these practical details should not be used to limit the present application. That is, in some embodiments of the present application, these practical details are not necessary. In addition, for the purpose of simplifying the drawings, some conventional structures and components will be shown in a simple schematic manner in the drawings.

[0028] It should be noted that all directional indications such as up, down, left, right, front, back, etc. in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between components in a certain specific posture such as shown in the drawings, and if the specific posture changes, the directional indications will also change accordingly.

[0029] In addition, the description such as "first", "second" and the like in the present application is only for the purpose of description, and is not intended to indicate the order or sequence, nor to limit the present application, which is merely to distinguish the components or operations described by the same technical terms, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can be explicitly or implicitly included at least one of the features. In addition, the technical solutions of various embodiments can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor in the protection scope required by the present application.

[0030] In order to further understand the practical new content, characteristics and effects of the present application, the following examples are given, and the details are described as follows with reference to the drawings.

[0031] According to Figures 1 to 6 As shown in the figure, the utility model provides a gear transmission electric push rod device, including motor 1, transmission structure 2 and telescopic structure 3, transmission structure 2 includes transmission shell 21 and transmission assembly 22, telescopic structure 3 includes telescopic shell 31 and telescopic assembly 32, telescopic shell 31 is wrapped in telescopic assembly 32 outside, telescopic assembly 32 includes threaded telescopic rod, threaded telescopic rod is connected with third transmission shaft 223 rotationally. Transmission structure 2 includes transmission shell 21, transmission shell 21 is wrapped in first transmission shaft 221, second transmission shaft 222 and third transmission shaft 223 outside, first shaft body 2211, second shaft body 2221 and third shaft body 2231 are all cylindrical. Telescopic shell 31 and transmission shell 21 both play the role of protection.

[0032] Motor 1, transmission structure 2 and telescopic structure 3 are sequentially connected, motor 1 is equipped with electric shaft 11, transmission assembly 22 is equipped with first transmission shaft 221, second transmission shaft 222 and third transmission shaft 223, electric shaft 11 is rotationally connected with first transmission shaft 221, first transmission shaft 221, second transmission shaft 222 and third transmission shaft 223 are sequentially rotationally connected, third transmission shaft 223 is rotationally connected with telescopic structure 3, first transmission shaft 221, second transmission shaft 222 and third transmission shaft 223 are stacked up and down, gear three-layer stacked design, reduces the volume of gear box, when electric push rod fails, can quickly locate the problem, reduces the difficulty and time cost of maintenance.

[0033] Specifically, the first transmission shaft 221 is provided with a first auxiliary shaft 2212 and a first main shaft 2213, the first auxiliary shaft 2212 is arranged above the first main shaft 2213, the first auxiliary shaft 2212 rotates synchronously with the first main shaft 2213, the first main shaft 2213 has a larger rotating radius than the first auxiliary shaft 2212, the first main shaft 2213 is connected with the electric shaft 11, when the motor 1 is started, the electric shaft 11 starts to rotate, the electric shaft 11 is in gear with the first main shaft 2213, and the first transmission shaft 221 is driven to rotate, the first main shaft 2213 has a larger rotating radius than the electric shaft 11, and the electric shaft 11 needs to rotate several rounds to drive the first main shaft 2213 to rotate one round, and the rotating speed of the electric shaft 11 is relatively fast.

[0034] The second transmission shaft 222 is provided with a second auxiliary shaft 2224 and a second main shaft 2223, the second auxiliary shaft 2224 is arranged above the second main shaft 2223, the second main shaft 2223 is connected with the first auxiliary shaft 2212, the second main shaft 2223 has a larger rotating radius than the first auxiliary shaft 2212, when the first transmission shaft 221 rotates, the first auxiliary shaft 2212 is in gear with the second main shaft 2223, and the first transmission shaft 221 needs to rotate several rounds to drive the second main shaft 2223 to rotate one round.

[0035] The second main shaft 2223 is further provided with a first recessed ring 2222 below, and the first main shaft 2213 is partially suspended in the first recessed ring 2222, so that the rotating space of the first main shaft 2213 is provided, and the volume of the gear box is reduced.

[0036] The third transmission shaft 223 is provided with a third main shaft 2233, the third main shaft 2233 is connected with the first auxiliary shaft 2212, the third main shaft 2233 has a larger rotating radius than the second auxiliary shaft 2224, when the second transmission shaft 222 rotates, the second auxiliary shaft 2224 is in gear with the third main shaft 2233, and the second transmission shaft 222 needs to rotate several rounds to drive the third main shaft 2233 to rotate one round.

[0037] The third main shaft 2233 is further provided with a second recessed ring 2232 below, and the second main shaft 2223 is partially suspended in the first recessed ring 2222, so that the rotating space of the second main shaft 2223 is provided, and the volume of the gear box is reduced.

[0038] The end cover 4 is arranged on the upper end of the transmission shell 21, the inner wall of the end cover 4 is provided with a tooth pattern 41, the end cover 4 is connected with the transmission shell 21 through the tooth pattern 41, the end cover 4 seals the top of the transmission shell 21, the connection mode through the tooth pattern 41 cancels screws and other components, improves the utilization of the internal space, and the top of the transmission shell 21 is low outside and high inside, so that the waterproof effect is improved.

[0039] The end cover 4 side wall is provided with a notch 42, the transmission housing 21 is provided with a limiting screw hole 211 at a corresponding position, the end cover 4 further comprises a limiting bolt 43, the limiting bolt 43 is inserted into the notch 42 through the limiting screw hole 211, when the thread 41 is rotated to a certain position, the notch 42 corresponds to the limiting screw hole 211, then the limiting bolt 43 is inserted into and clamped in the notch 42, which prevents the end cover 4 from loosening and ensures the accuracy of the joint angle.

[0040] A first boss 214 is arranged on the upper end of the corresponding transmission housing 21, a fitting groove 216 is arranged on the surface of the first boss 214, and a connecting block 212 is arranged on both sides of the fitting groove 216, and the connecting block 212 is provided with the limiting screw hole 211.

[0041] The outer periphery of the fitting groove 216 is further provided with a waterproof groove 215, the outer threaded sleeve 213 is fitted on the fitting groove 216 through a bolt, and the bottom of the outer threaded sleeve 213 covers the waterproof groove 215; the end cover 4 is threadedly connected with the outer threaded sleeve 213 through the thread 41.

[0042] The outer periphery of the fitting groove 216 is further provided with a waterproof groove 215, the outer threaded sleeve 213 is fitted on the fitting groove 216 through a bolt, and the bottom of the outer threaded sleeve 213 covers the waterproof groove 215; the end cover 4 is threadedly connected with the outer threaded sleeve 213 through the thread 41.

[0043] The beneficial effects are that the outer threaded sleeve 213 is firmly fixed on the fitting groove 216 of the transmission housing 21 through a bolt, ensuring the stability and reliability of the connection. At the same time, the threaded connection between the end cover 4 and the outer threaded sleeve 213 not only facilitates installation and disassembly, but also forms a tight seal after tightening, further enhancing the stability and waterproofness of the connection. Moreover, the first boss 214 is higher than the transmission housing 21, which can avoid the accumulation of rainwater at the position of the first boss 214, thereby effectively preventing rainwater from accumulating at the end cover 4 and its connection part, significantly reducing corrosion, rust and other damages caused by water erosion, and prolonging the service life of the equipment. In addition, the waterproof groove 215 constitutes a key waterproof barrier. Its position is close to the outer periphery of the fitting groove 216, which can intercept and store rainwater that may seep into the gap between the outer threaded sleeve 213 and the fitting groove 216, preventing it from further penetrating into the internal key components, providing an additional waterproof protection layer, greatly enhancing the waterproof ability of the assembly part and the durability of the overall structure. The threaded connection of the end cover 4 makes the maintenance and repair work simple and fast. When the internal components need to be checked or replaced, the end cover 4 can be easily unscrewed, without the need for complex disassembly process, greatly saving maintenance time and cost, and improving the maintainability of the equipment.

[0044] In use, the motor 1 is started, the electric shaft 11 drives the first transmission shaft 221 to rotate, the first transmission shaft 221 drives the second transmission shaft 222 to rotate, the second transmission shaft 222 drives the third transmission shaft 223 to rotate, the third transmission shaft 223 is fixedly connected with the screw telescopic rod, the screw telescopic rod is sleeved with the screw empty rod, the screw empty rod is pushed out outward through the rotation of the screw telescopic rod and the screw empty rod, and due to the three-layer superposition design of the gear, the transmission ratio is greatly increased.

[0045] The preferred embodiments of the utility model are described in detail above. It should be understood that ordinary technical personnel in the art can make many modifications and changes according to the concept of the utility model without creative labor. Therefore, any technical scheme obtained by logical analysis, reasoning or limited test on the basis of the prior art according to the concept of the utility model should be within the protection scope determined by the claims.

Claims

1. A gear-driven electric push rod device, comprising a motor (1), a transmission structure (2) and a telescopic structure (3), the motor (1), the transmission structure (2) and the telescopic structure (3) are connected in sequence, characterized in that: The motor (1) is provided with an electric shaft (11), the transmission structure (2) is provided with a first transmission shaft (221), a second transmission shaft (222) and a third transmission shaft (223), the electric shaft (11) is in rotation connection with the first transmission shaft (221), the first transmission shaft (221), the second transmission shaft (222) and the third transmission shaft (223) are in rotation connection in sequence, and the third transmission shaft (223) is in rotation connection with the telescopic structure (3).

2. A gear-driven motor putter device according to claim 1, wherein: The first transmission shaft (221) is provided with a first auxiliary shaft (2212) and a first main shaft (2213), the first auxiliary shaft (2212) is arranged above the first main shaft (2213), and the first main shaft (2213) is connected with the electric shaft (11).

3. A gear-driven motor putter device according to claim 2, wherein: The second transmission shaft (222) is provided with a second auxiliary shaft (2224) and a second main shaft (2223), the second auxiliary shaft (2224) is arranged above the second main shaft (2223), and the second main shaft (2223) is connected with the first auxiliary shaft (2212).

4. A gear-driven motor putter device according to claim 3, wherein: The second main shaft (2223) is further provided with a first recessed ring (2222) below, and the first main shaft (2213) is partially suspended in the first recessed ring (2222).

5. The gear-driven motor putter device of claim 3, wherein: The third transmission shaft (223) is provided with a third main shaft (2233), and the third main shaft (2233) is connected with the first auxiliary shaft (2212).

6. A gear-driven motor putter device according to claim 5, wherein: The third main shaft (2233) is further provided with a second recessed ring (2232) below, and the second main shaft (2223) is partially suspended in the first recessed ring (2222).

7. The gear-driven motor putter device of claim 1, wherein: The telescopic structure (3) comprises a telescopic shell (31) and a telescopic assembly (32), the telescopic shell (31) is wrapped outside the telescopic assembly (32), the telescopic assembly (32) comprises a threaded telescopic rod, and the threaded telescopic rod is in rotation connection with the third transmission shaft (223).

8. The gear-driven motor putter device of claim 1, wherein: The transmission structure (2) comprises a transmission shell (21), and the transmission shell (21) is wrapped outside the first transmission shaft (221), the second transmission shaft (222) and the third transmission shaft (223).

9. A gear-driven motor putter device according to claim 8, wherein: An end cover (4) is arranged on the upper end of the transmission shell (21), the inner wall of the end cover (4) is provided with a tooth (41), and the end cover (4) is connected with the transmission shell (21) through the tooth (41).

10. A gear-driven motor putter device according to claim 9, wherein: A notch (42) is arranged on the side wall of the end cover (4), a limiting screw hole (211) is arranged at the corresponding position of the transmission shell (21), and the end cover (4) further comprises a limiting bolt (43), the limiting bolt (43) is inserted into the notch (42) through the limiting screw hole (211).

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