A bendable push rod

Abstract

The present application relates to the technical field of electric trolley, especially to a foldable trolley, which comprises a shell, a first driving assembly arranged in the shell, and a sleeve, a telescopic assembly arranged in the sleeve, a connecting assembly for connecting the shell and the sleeve, the connecting assembly comprising a folding assembly, a transmission assembly for transmitting the output power of the first driving assembly to the telescopic assembly, and a second driving assembly for driving the sleeve to rotate relative to the shell, the folding assembly comprising a first connecting bracket connected with the shell, a second connecting bracket connected with the sleeve, the first connecting bracket being hinged to the second connecting bracket, the second driving assembly being connected with the second connecting bracket, and the output end of the second driving assembly being connected with the first connecting bracket. The foldable trolley has the advantages of flexible folding, stable and efficient transmission, durability, and energy saving.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric push rods, in particular to a foldable push rod. BACKGROUND

[0002] As a common mechanical tool, electric push rods are commonly used in many fields such as industrial automation, smart home, medical equipment, etc. Electric push rods convert the rotary motion of electric motors into linear reciprocating motion of push rods, and have been widely used due to their simple structure, precise control and smooth operation. However, in actual application, the non-folding characteristics of electric push rods limit their widespread use. Traditional electric push rods are rigid structures that can only move along a fixed straight trajectory during movement and cannot change direction or fold according to actual needs.

[0003] Chinese patent CN222282977U discloses a large-torque linear push rod. It includes a rear end assembly, a sleeve assembly arranged on one side of the rear end assembly, a motor assembly arranged inside the rear end assembly, a lead screw assembly connected to the motor assembly and arranged inside the sleeve assembly, and a telescopic tube assembly arranged between the sleeve assembly and the lead screw assembly. The motor assembly and the lead screw assembly are fixedly connected through a shaft coupling. The shaft coupling includes a motor bracket arranged at the output end of the motor assembly and a fixed seat arranged close to the motor bracket and arranged on the outer periphery of the inner lead screw of the lead screw assembly. The fixed seat and the motor bracket are connected by a spline. It provides a large-torque, stable, simple structure and convenient to use.

[0004] However, the linear push rod of this technical solution cannot realize folding movement, and still has limitations in scenarios where the movement direction needs to be changed. SUMMARY

[0005] The present application aims to overcome the shortcomings of the prior art and provide a foldable push rod that can achieve the folding function of an electric push rod through the connection assembly, thereby solving the problem of limited use of electric push rods due to their non-folding characteristics.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0007] A foldable push rod, comprising:

[0008] a housing, the housing being provided with a first drive assembly;

[0009] a sleeve, the sleeve being provided with a telescopic assembly;

[0010] It also includes a connecting assembly that connects the housing to the sleeve rotating rod, the connecting assembly including a bending assembly, a transmission assembly that transmits the output power of the first drive assembly to the telescopic assembly, and a second drive assembly that drives the sleeve to rotate relative to the housing;

[0011] The bending assembly includes a first connecting bracket connected to the housing; a second connecting bracket connected to the sleeve; the first connecting bracket and the second connecting bracket are hinged together.

[0012] The second drive component is connected to the second connecting bracket, and its output terminal is connected to the first connecting bracket.

[0013] Preferably, the transmission assembly includes:

[0014] A first bevel gear is rotatably mounted on a first connecting bracket, and the output end of the first drive assembly is connected to the first bevel gear.

[0015] The second bevel gear is connected to the telescopic assembly;

[0016] The third bevel gear is rotatably mounted on the second connecting bracket, and the third bevel gear meshes with the first bevel gear and the second bevel gear simultaneously for transmission connection.

[0017] Preferably, the third bevel gear meshes perpendicularly with the first bevel gear and the second bevel gear at 90°.

[0018] Preferably, the first connecting bracket is provided with a first connecting part and a second connecting part; the second connecting bracket is provided with a third connecting part and a fourth connecting part; the first connecting part is hinged to the third connecting part; and the second connecting part is hinged to the fourth connecting part.

[0019] Preferably, the bending assembly further includes a pad connected to the outside of the first connecting part, the second driving assembly is located inside the third connecting part, and the output end of the second driving assembly passes through the third connecting part and the first connecting part in sequence and is connected to the pad.

[0020] Preferably, the second connecting bracket further includes a fifth connecting part for fixing the push rod to an external object.

[0021] Preferably, the first drive assembly includes a drive motor and a reducer, and the output end of the reducer is connected to the first bevel gear.

[0022] Preferably, the telescopic component includes:

[0023] A lead screw, which is connected to a second bevel gear;

[0024] A transmission nut is threadedly connected to the lead screw, and the outer side of the transmission nut is slidably connected to the sleeve.

[0025] And a telescopic tube, which is connected to the transmission nut and reciprocates with the transmission nut.

[0026] Preferably, it further includes a protective component for isolating the connecting components, the two ends of which are connected to the first connecting bracket and the second connecting bracket respectively by fasteners.

[0027] The beneficial effects of this invention are as follows:

[0028] (1) By setting a bending component of the first connecting bracket and the second connecting bracket hinge, the present invention realizes flexible bending between the housing and the sleeve, breaking the limitation that the traditional electric push rod can only move in a straight line.

[0029] (2) The present invention uses a transmission component in which a first bevel gear, a second bevel gear and a third bevel gear mesh with each other, and the third bevel gear meshes with the first and second bevel gears at a 90° angle. This achieves the bending function of the push rod while ensuring the high efficiency and stability of the power transmission.

[0030] (3) By setting up protective components and connecting them to the first and second connecting brackets with several bolts, the present invention effectively isolates and protects the connecting components, extends the service life of the connecting components, reduces the maintenance cost of the equipment, and ensures the stability and safety of the push rod during long-term use.

[0031] In summary, this invention has the advantages of flexible bending, stable and efficient transmission, durability and low consumption. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0033] Figure 2 This is a bottom view of the overall structure of the present invention;

[0034] Figure 3 For the present invention Figure 2 Enlarged view of a portion of point I in the middle;

[0035] Figure 4 This is a cross-sectional view of the overall structure of the present invention;

[0036] Figure 5 This is a schematic diagram of the protective components of the present invention;

[0037] Figure Labels

[0038] 1. Housing; 11. First drive assembly; 111. Drive motor; 112. Reducer; 2. Sleeve; 21. Telescopic assembly; 211. Lead screw; 212. Transmission nut; 213. Telescopic tube; 3. Connecting assembly; 31. Bending assembly; 311. First connecting bracket; 3111. First connecting part; 3112. Second connecting part; 312. Second connecting bracket; 3121. Third connecting part; 3122. Fourth connecting part; 3123. Fifth connecting part; 32. Transmission assembly; 321. First bevel gear; 322. Second bevel gear; 323. Third bevel gear; 33. Shim; 34. Second drive assembly; 4. Protective assembly. Detailed Implementation

[0039] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0041] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0042] Example 1

[0043] like Figures 1-3 As shown, this embodiment provides a bendable push rod, including: a housing 1, in which a first drive assembly 11 is provided; and a sleeve 2, in which a telescopic assembly 21 is provided;

[0044] It also includes a connecting assembly 3 that connects the housing 1 and the sleeve 2 to the rotating rod. The connecting assembly 3 includes a bending assembly 31, a transmission assembly 32 that transmits the output power of the first driving assembly 11 to the telescopic assembly 21, and a second driving assembly 34 that drives the sleeve 2 to rotate relative to the housing 1.

[0045] The bending assembly 31 includes a first connecting bracket 311 connected to the housing 1; and a second connecting bracket 312 connected to the sleeve 2; the first connecting bracket 311 and the second connecting bracket 312 are hinged together.

[0046] The second drive component 34 is connected to the second connecting bracket 312, and its output end is connected to the first connecting bracket 311.

[0047] The first connecting bracket 311 is provided with a first connecting part 3111 and a second connecting part 3112; the second connecting bracket 312 is provided with a third connecting part 3121 and a fourth connecting part 3122; the first connecting part 3111 is hinged to the third connecting part 3121; the second connecting part 3112 is hinged to the fourth connecting part 3122.

[0048] The bending component 31 enables flexible bending between the housing and the sleeve, breaking the limitation that traditional electric actuators can only move in a straight line.

[0049] The bending assembly 31 further includes a pad 33 connected to the outside of the first connecting portion 3111. The second driving assembly 34 is located inside the third connecting portion 3121. The output end of the second driving assembly 34 passes through the third connecting portion 3121 and the first connecting portion 3111 in sequence and connects to the pad 33. Specifically, the pad 33 is fixedly connected to the first connecting portion 3111 by fasteners, and the pad 33 is engaged with the output end of the second driving assembly 34, causing the second driving assembly 34 to drive the pad 33 to rotate, thereby realizing the relative rotation of the first connecting bracket 311 and the second connecting bracket 312.

[0050] The pad 33 is used to increase the force-bearing area of ​​the connector, reduce the pressure per unit area, protect the surfaces of the first connecting part 3111 and the third connecting part 3121 from damage, and limit the relative displacement of the connecting parts.

[0051] The second connecting bracket 312 also includes a fifth connecting part 3123 for fixing the push rod to an external object.

[0052] Example 2

[0053] like Figure 3As shown, components that are the same as or corresponding to those in Embodiment 1 are referred to using the same reference numerals as in Embodiment 1. For simplicity, only the differences from Embodiment 1 are described below. The difference between Embodiment 2 and Embodiment 1 is as follows:

[0054] It also includes a transmission assembly 32, which comprises:

[0055] The first bevel gear 321 is rotatably mounted on the first connecting bracket 311, and the output end of the first drive assembly 11 is connected to the first bevel gear 321.

[0056] The second bevel gear 322 is connected to the telescopic assembly 21;

[0057] The third bevel gear 323 is rotatably mounted on the second connecting bracket 312; it is connected to the inner side of the fourth connecting part 3122 by a connecting member; the third bevel gear 323 meshes with the first bevel gear 321 and the second bevel gear 322 simultaneously for transmission connection.

[0058] The third bevel gear 323 meshes perpendicularly with the first bevel gear 321 and the second bevel gear 322 at 90°.

[0059] When the first drive component is activated, the first drive component 11 drives the first bevel gear 321 to rotate, transmitting power to the third bevel gear 323. Through meshing, the direction of power transmission is changed, realizing the transmission of normal driving force during the bending process of the electric push rod. This drives the push rod telescopic component 21 to reciprocate, thereby enabling the electric push rod to bend.

[0060] The transmission assembly 32 ensures efficient and stable power transmission while enabling the push rod to bend. This gear transmission structure can accurately transmit the power from the first drive assembly to the telescopic assembly, avoiding power loss or transmission delay caused by the bending design, so that the push rod can maintain good control accuracy and smooth operation even when bent.

[0061] Example 3

[0062] like Figure 4 As shown, components that are the same as or corresponding to those in Embodiment 1 are referred to using the same reference numerals as in Embodiment 1. For simplicity, only the differences from Embodiment 1 are described below. The difference between Embodiment 3 and Embodiment 1 is as follows:

[0063] The first drive assembly 11 includes a drive motor 111 and a reducer 112, the output end of which is connected to the first bevel gear 321. The drive motor provides stable power output to the transmission assembly.

[0064] The telescopic component 21 includes:

[0065] Lead screw 211, which is connected to the second bevel gear 322;

[0066] The transmission nut 212 is threadedly connected to the lead screw 211, and the outer side of the transmission nut 212 is slidably connected to the sleeve 2.

[0067] And a telescopic tube 213, which is connected to the transmission nut 212 and reciprocates with the transmission nut 212.

[0068] Example 4

[0069] like Figure 5 As shown, components that are the same as or corresponding to those in Embodiment 1 are referred to using the same reference numerals as those in Embodiment 1. For simplicity, only the differences from Embodiment 1 are described below. The difference between Embodiment 4 and Embodiment 1 is as follows:

[0070] It also includes a protective component 4 for isolating the connecting component 3, the two ends of which are connected to the first connecting bracket 311 and the second connecting bracket 312 respectively by fasteners.

[0071] The protective component 4 effectively isolates and protects the connecting components. It prevents external dust and impurities from entering the connecting components, avoiding interference or damage to gear meshing and connector movement. It also reduces the impact of external collisions on the connecting components. This design extends the service life of the connecting components, reduces equipment maintenance costs, and ensures the stability and safety of the push rod during long-term use.

[0072] 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 within the protection scope of the present invention.

Claims

1. A bendable push rod, comprising: Housing (1), wherein a first drive assembly (11) is provided inside the housing (1); and a sleeve (2), wherein a telescopic component (21) is provided inside the sleeve (2); The feature is that it further includes a connecting assembly (3) that connects the housing (1) and the sleeve (2) rotating rod. The connecting assembly (3) includes a bending assembly (31), a transmission assembly (32) that transmits the output power of the first driving assembly (11) to the telescopic assembly (21), and a second driving assembly (34) that drives the sleeve (2) to rotate relative to the housing (1). The bending assembly (31) includes a first connecting bracket (311) connected to the housing (1); and a second connecting bracket (312) connected to the sleeve (2); the first connecting bracket (311) and the second connecting bracket (312) are hinged together; The second drive component (34) is connected to the second connecting bracket (312), and its output end is connected to the first connecting bracket (311); The first connecting bracket (311) is provided with a first connecting part (3111) and a second connecting part (3112); the second connecting bracket (312) is provided with a third connecting part (3121) and a fourth connecting part (3122); the first connecting part (3111) is hinged to the third connecting part (3121); the second connecting part (3112) is hinged to the fourth connecting part (3122); The bending assembly (31) also includes a pad (33) connected to the outside of the first connecting part (3111), and the second driving assembly (34) is located inside the third connecting part (3121). The output end of the second driving assembly (34) passes through the third connecting part (3121) and the first connecting part (3111) in sequence and is connected to the pad (33).

2. The bendable push rod according to claim 1, characterized in that, The transmission assembly (32) includes: The first bevel gear (321) is rotatably mounted on the first connecting bracket (311), and the output end of the first drive assembly (11) is connected to the first bevel gear (321). The second bevel gear (322) is connected to the telescopic assembly (21); The third bevel gear (323) is rotatably mounted on the second connecting bracket (312); the third bevel gear (323) meshes with the first bevel gear (321) and the second bevel gear (322) simultaneously for transmission connection.

3. A bendable push rod according to claim 2, characterized in that, The third bevel gear (323) meshes perpendicularly with the first bevel gear (321) and the second bevel gear (322) at 90°.

4. A bendable push rod according to claim 1, characterized in that, The second connecting bracket (312) also includes a fifth connecting part (3123) for fixing the push rod to an external object.

5. A bendable push rod according to claim 2, characterized in that, The first drive assembly (11) includes a drive motor (111) and a reducer (112), the output end of which is connected to the first bevel gear (321).

6. A bendable push rod according to claim 1, characterized in that, The telescopic component (21) includes: A lead screw (211) is connected to a second bevel gear (322); The transmission nut (212) is threadedly connected to the lead screw (211), and the outer side of the transmission nut (212) is slidably connected to the sleeve (2). And a telescopic tube (213), which is connected to the transmission nut (212) and reciprocates with the transmission nut (212).

7. A bendable push rod according to claim 1, characterized in that, It also includes a protective component (4) for isolating the connecting component (3), the two ends of which are connected to the first connecting bracket (311) and the second connecting bracket (312) respectively by fasteners.

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