Large-torque linear push rod

Abstract

The utility model relates to the technical field of linear push rods, in particular to a large-torque linear push rod. Comprising a rear end assembly; the sleeve assembly is arranged on one side of the rear end assembly; the motor assembly is arranged in the rear end assembly; the lead screw assembly is connected with the motor assembly, and the lead screw assembly is arranged in the sleeve assembly; the telescopic pipe assembly is arranged between the sleeve assembly and the lead screw assembly, and the motor assembly is fixedly connected with the lead screw assembly through a coupler; the coupler comprises a motor frame arranged at the output end of the motor assembly; the fixing base is arranged close to the motor frame, and the fixing base is arranged on the periphery of an inner lead screw of the lead screw assembly; and the fixed seat is in spline connection with the motor frame. The utility model has the advantages of larger thrust, good stability, simple structure, convenience in use and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of linear push rods, in particular to a large-torque linear push rod. Background Art

[0002] The electric push rod makes reciprocating motion within a certain range of stroke. Generally, the standard stroke of the electric push rod is 100, 150, 200, 250, 300, 350, and 400mm. Special strokes can also be designed and customized according to different application conditions.

[0003] Electric linear actuators can be designed with different thrusts according to different application loads. Existing linear actuators generally directly connect the motor and the lead screw through a flat key. However, the thrust of the electric linear actuator connected by the flat key is relatively small, that is, the torque of the lead screw assembly is relatively small, and it is generally only suitable for objects of small weight or that only require a small thrust to push. When acting on a heavy object that requires a large thrust, the thrust of the existing linear actuator is insufficient to push the object, and it may cause damage to the linear actuator, which has great limitations. Utility Model Content

[0004] The purpose of the utility model is to address the deficiencies of the prior art and provide a high-torque linear push rod, which, through a coupling arranged between a motor assembly and a screw assembly in conjunction with a telescopic tube assembly, achieves the function of pushing objects of great weight or requiring a large thrust to be pushed, thereby solving the problem of low thrust in the prior art.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A high-torque linear push rod, comprising:

[0007] Backend components;

[0008] A sleeve assembly, arranged on one side of the rear end assembly;

[0009] A motor assembly, disposed inside the rear end assembly;

[0010] A screw assembly is connected to the motor assembly and is disposed inside the sleeve assembly; and

[0011] The telescopic tube assembly is arranged between the sleeve assembly and the screw assembly, and the motor assembly and the screw assembly are fixedly connected via a coupling.

[0012] Preferably, the coupling comprises:

[0013] A motor frame, arranged at an output end of the motor assembly; and

[0014] The fixing seat is arranged close to the motor frame, and the fixing seat is arranged on the outer periphery of the inner screw of the screw assembly.

[0015] Preferably, the fixing seat and the motor frame are spline-connected.

[0016] Preferably, a plurality of protrusions are provided on the motor frame, and the extension directions of the edge lines of two sides of the protrusions both pass through the center of the motor frame.

[0017] Preferably, the fixing seat is provided with a groove matched with the protrusion.

[0018] Preferably, the motor frame and the motor assembly are connected via a plurality of fasteners.

[0019] Preferably, a plurality of through holes are provided on the motor frame, and the fastener passes through the through holes and is fixedly connected to the motor assembly.

[0020] Preferably, the extension portion of the fixing seat and the sleeve assembly are also spline-connected.

[0021] Preferably, the motor frame and the inner screw are connected via a bearing.

[0022] Preferably, the fixing seat and the inner screw rod are connected via a shaft sleeve assembly.

[0023] The beneficial effects of the utility model are:

[0024] (1) The utility model sets the motor frame at the output end of the motor, and sets the fixing seat at the input end of the screw rod. The two are combined to form a coupling, which increases the torque of the screw rod and further increases the thrust of the push rod, so that the push rod can act on heavy objects or objects that require a large thrust to push, and strengthens the connection between the screw rod and the motor, making the structure of the push rod more stable and firm.

[0025] (2) The utility model provides a plurality of protrusions on the motor frame, and the protrusions are inserted into the grooves of the fixing seat to form a spline connection. The spline connection has the advantages of more uniform connection force, less stress concentration at the tooth root, more teeth, and a larger total contact area, and can withstand a larger load (that is, it can increase the torque of the entire push rod). In addition, the extension direction of the edge lines of the two side edges of the protrusion passes through the center of the motor frame, that is, the torque direction of the push rod is perpendicular to the side edges of the protrusion, which ensures the stability of the torque and further increases the stability of the push rod.

[0026] (3) The utility model installs a bearing between the motor frame and the inner screw, and a shaft sleeve assembly is installed between the fixed seat and the inner screw. These structures ensure that the motor can transmit power to the screw, and the structure is simple and easy to disassemble and assemble.

[0027] In summary, the utility model has the advantages of greater thrust, good stability, simple structure and convenient use. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a cross-sectional view of the overall structure of the utility model;

[0029] Figure 2 for Figure 1 A magnified image of point A;

[0030] Figure 3 This is a schematic diagram of the installation of the coupling of the utility model;

[0031] Figure 4 This is a structural schematic diagram of the motor frame of the utility model;

[0032] Figure 5 It is a structural schematic diagram of the fixing seat of the utility model.

[0033] Figure markings: 1-rear end assembly; 2-sleeve assembly; 3-motor assembly; 4-screw assembly; 41-inner screw; 42-bearing; 43-sleeve assembly; 5-telescopic tube assembly; 6-coupling; 61-motor frame; 611-bump; 612-side; 613-fastener; 614-through hole; 62-fixing seat; 621-groove; 622-extension. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0035] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the equipment or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0036] Example

[0037] like Figure 1-5 As shown, this embodiment provides a high-torque linear push rod, including: a rear end component 1, a sleeve component 2 arranged on one side of the rear end component 1, a motor component 3 arranged inside the rear end component 1, a screw assembly 4 arranged inside the sleeve component 2, and a telescopic tube assembly 5 arranged between the sleeve component 2 and the screw assembly 4, the screw assembly 4 is connected to the motor assembly 3, and the motor assembly 3 and the screw assembly 4 are fixedly connected by a coupling 6, and the coupling 6 increases the torque of the entire push rod, expands the use range of the push rod, and is easy to operate.

[0038] Among them, the coupling 6 includes: a motor frame 61 arranged at the output end of the motor assembly 3 and a fixed seat 62 arranged close to the motor frame 61, and the fixed seat 62 is arranged on the outer periphery of the inner screw 41 of the screw assembly 4. The coupling 6 has a simple structure and is easy to disassemble and assemble.

[0039] At the same time, the fixing seat 62 and the motor frame 61 are splined, and the extension portion 622 of the fixing seat 62 and the sleeve assembly 2 are also splined. This is mainly because the spline connection has the advantages of more uniform connection force, less stress concentration at the tooth root, more teeth, a large total contact area, and can withstand a larger load (that is, it can increase the torque of the entire push rod). The parts on the shaft and the shaft have good concentricity and better guidance, so that the push rod can have a larger torque to increase the scope of application of the push rod.

[0040] In this embodiment, a plurality of protrusions 611 are provided on the motor frame 61, and the edge extension directions of the two side edges 612 of the protrusion 611 both pass through the center of the motor frame 61, that is, the shape of the protrusion 611 is not square, and can be approximately trapezoidal, and its two side edges 612 are inclined and intersect with the center line of the motor frame 61, so that the inner screw 41 is in the best force position, and its torque direction is perpendicular to the edge direction of the side edges 612 of the protrusion 611, so that the operation of the push rod is more stable.

[0041] In this embodiment, a groove 621 adapted to the protrusion 611 is provided on the fixing seat 62, and the protrusion 611 is inserted into the groove 621 to form a spline connection. It has a simple structure and is easy to disassemble and assemble. This connection method is more stable and firm, and will not cause the push rod to shake during operation, so it is easy to use.

[0042] In this embodiment, the motor frame 61 is connected to the motor assembly 3 via a plurality of fasteners 613, and the fasteners 613 are preferably bolts, which are evenly distributed on the motor frame 61 to ensure that the motor frame 61 is firmly fixed on the motor assembly 3 to prevent the motor frame 61 from shaking when the motor assembly 3 is working.

[0043] In this embodiment, a plurality of through holes 614 are provided on the motor frame 61, and the fasteners 613 pass through the through holes 614 and are fixedly connected to the motor assembly 3, which has a simple structure, convenient operation and good fixing effect.

[0044] Of course, the motor frame 61 is connected to the inner screw rod 41 via a bearing 42 , and the bearing 42 is sleeved on the inner screw rod 41 , which can not only ensure the normal rotation of the inner screw rod 41 , but also make the bearing 42 more stable and firm.

[0045] In addition, the fixed seat 62 is connected to the inner screw rod 41 through a shaft sleeve assembly 43, and the shaft sleeve assembly 43 is sleeved on the inner screw rod 41, which can not only ensure the normal rotation of the inner screw rod 41, but also make the shaft sleeve assembly 43 more stable and firm, so that the rotation of the inner screw rod 41 is more stable, thereby ensuring the stability of the entire push rod.

[0046] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A high torque linear push rod, characterized in that: include: Backend components; A sleeve assembly, arranged on one side of the rear end assembly; A motor assembly, disposed inside the rear end assembly; A screw assembly is connected to the motor assembly and is disposed inside the sleeve assembly; as well as The telescopic tube assembly is arranged between the sleeve assembly and the screw assembly, and the motor assembly and the screw assembly are fixedly connected via a coupling.

2. A high torque linear push rod according to claim 1, characterized in that: The coupling comprises: A motor frame, arranged at an output end of the motor assembly; and The fixing seat is arranged close to the motor frame, and the fixing seat is arranged on the outer periphery of the inner screw of the screw assembly.

3. A high torque linear push rod according to claim 2, characterized in that: The fixing seat and the motor frame are spline-connected.

4. A high torque linear push rod according to claim 3, characterized in that: The motor frame is provided with a plurality of protrusions, and the extension directions of the edge lines of the two sides of the protrusions both pass through the center of the motor frame.

5. A high torque linear push rod according to claim 4, characterized in that: The fixing seat is provided with a groove matched with the protrusion.

6. A high torque linear push rod according to claim 5, characterized in that: The motor frame and the motor assembly are connected via a plurality of fasteners.

7. A high torque linear push rod according to claim 6, characterized in that: The motor frame is provided with a plurality of through holes, and the fasteners pass through the through holes and are fixedly connected to the motor assembly.

8. A high torque linear push rod according to claim 2, characterized in that: The extension portion of the fixing seat and the sleeve assembly are also spline-connected.

9. A high torque linear push rod according to claim 2, characterized in that: The motor frame and the inner screw rod are connected via a bearing.

10. A high torque linear push rod according to claim 2, characterized in that: The fixing seat and the inner screw rod are connected via a shaft sleeve assembly.

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