Linear transmission push rod

Abstract

The utility model relates to the technical field of linear transmission, and discloses a linear transmission push rod which comprises a main rod, a main rod rear cap and a main rod cover, the main rod rear cap and the main rod cover are installed at the two ends of the main rod in a threaded mode respectively, an installation groove and a lubricating oil groove are formed in the inner wall of the main rod, and a motor assembly located below the main rod rear cap is installed in the main rod. The motor assembly is connected with the coupler through the connecting frame, the coupler is connected to one end of the lead screw in a sleeving mode, the telescopic rod is fixedly connected to the nut pair in a threaded mode, the telescopic rod cap is detachably installed at the tail end of the telescopic rod in a threaded mode, and the travel switch installed on the plastic sheet is arranged on one side of the outer wall of the telescopic rod. A plastic plug connected to the tail end of the lead screw in a sleeving mode is installed between the main rod cover and the stroke plastic sheet. Through the excellent machining process and assembly process, the push rod has good sealing performance, the service life of the push rod can be prolonged, the working efficiency of the push rod can be improved, noise in the transmission process can be effectively reduced, and the self-locking capacity is high.

Description

TECHNICAL FIELD

[0001] The utility model relates to linear transmission technical field especially relates to a linear transmission push rod. BACKGROUND

[0002] The existing linear transmission push rod generally has problems of complex structure, loud noise, poor sealing and the like. These problems are particularly prominent in actual application, especially in the fields of electromechanical equipment, automatic control device, medical instrument and the like requiring high precision and stability, and seriously affect the working efficiency and reliability of the push rod. Therefore, a linear transmission push rod with reasonable structure, simple manufacturing, good sealing, low noise and large pushing force is urgently needed to solve many deficiencies in the prior art. SUMMARY

[0003] The utility model aims at providing a linear transmission push rod with reasonable structure, simple manufacturing, low noise and good sealing.

[0004] To achieve the above-mentioned purpose, the linear transmission push rod of the utility model provides the following technical scheme:

[0005] The utility model discloses a linear transmission push rod, which comprises a main rod and a main rod rear cap threadedly installed at one end of the main rod, a main rod cover threadedly detachably installed at the other end of the main rod, a motor assembly installed inside the main rod and located below the main rod rear cap, a connecting frame connected with a shaft coupling, the shaft coupling being sleeved at one end of a lead screw, a nut pair threadedly connected with a telescopic rod and sleeved at a position below the shaft coupling on the lead screw, a telescopic rod cap detachably threadedly installed at one end of the telescopic rod away from the shaft coupling, a travel plastic sheet arranged on one side of the outer wall of the telescopic rod, and a plastic plug sleeved at the end of the lead screw away from the shaft coupling and installed between the main rod cover and the travel plastic sheet.

[0006] Preferably, in the linear transmission push rod, the motor assembly comprises a motor end located below the main rod rear cap and a motor shaft sleeve sleeved at the lower end of the motor end, a hole is arranged in the middle of the main rod cover, the connecting frame comprises a shaft and a nut matched with the shaft, a wire port is formed in the main rod rear cap, and a wire hole is sleeved on the wire port.

[0007] Preferably, in the linear transmission push rod, butterfly elastic sheets are installed between the motor shaft sleeve and the shaft coupling and between the motor end and the main rod rear cap.

[0008] Preferably, in the linear transmission push rod, a nut retainer ring is sleeved on the lead screw and installed below the nut.

[0009] Preferably, in the linear transmission push rod, a rubber gasket is sleeved at the lowermost end of the telescopic rod, and a travel switch is actuated by the telescopic nut pair.

[0010] Preferably, in the above straight transmission push rod, the cross-sectional pattern of the single thread of the screw rod is trapezoidal, and the screw rod has self-locking capability.

[0011] Compared with the prior art, the utility model has the following advantages:

[0012] Good sealing, the installation groove and the sealing element are arranged in the main rod, the threaded connection of both ends is provided with sealing glue, an effective sealing barrier is formed, dust and moisture can be effectively prevented from entering the push rod, the IP level can reach IP67, the service life of the push rod is prolonged, and normal work of the push rod in a harsh environment is ensured.

[0013] Good stability, the connection of the motor assembly and the shaft coupling is stable, the push rod is more stable and reliable during work, and the working efficiency of the push rod is improved.

[0014] Low noise: the transmission structure is optimized, noise reduction elements such as butterfly-shaped elastic sheets and rubber gaskets are adopted, noise in the transmission process is effectively reduced, and a more quiet working environment is provided for users.

[0015] Large thrust: through optimization of the screw rod, the shaft coupling and the thrust ball bearing structure design, the thrust can reach 5000N, and the application demand of larger thrust can be met.

[0016] Strong self-locking capability: the trapezoidal thread screw rod has strong self-locking force, effectively prevents loosening of the push rod in a non-working state, and ensures safety and stability of the push rod. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is the overall structure of the utility model sectional view;

[0018] Figure 2 It is the explosion structure schematic view of the utility model;

[0019] Figure 3 It is the screw rod assembly structure schematic view of the utility model;

[0020] Figure 4 It is the motor assembly structure schematic view of the utility model;

[0021] Figure 5 It is the telescopic rod assembly structure sectional view of the utility model;

[0022] Figure 6 It is the main rod internal installation groove structure schematic view of the utility model;

[0023] Legend:

[0024] 1, screw rod; 2, motor assembly; 3, main rod; 4, stroke plastic piece; 5, main rod rear cap; 6, telescopic rod; 7, shaft coupling; 8, telescopic rod cap; 9, nut; 10, shaft; 11, plastic plug; 12, main rod cover; 13, nut pair; 201, motor end; 202, motor shaft sleeve; 501, wire port; 502, wire passing port; 601, rubber gasket. DETAILED DESCRIPTION

[0025] The technical solutions in the utility model application will be described clearly and completely below with reference to the drawings in the utility model application. Obviously, the described application is only part of the application, not the whole application. Based on the application in the utility model, all other applications obtained by the ordinary skilled in the art without creative labor belong to the protection scope of the utility model.

[0026] Referring to Figures 1-6 The utility model discloses a linear transmission push rod:

[0027] As Figures 1-6 shown, the application discloses a linear transmission push rod, which comprises a main rod 3 and a main rod rear cap 5 threadedly installed at one end of the main rod 3, the other end of the main rod 3 is threadedly detachably installed with a main rod cover 12, the main rod 3 is internally installed with a motor assembly 2 located below the main rod rear cap 5, the motor assembly 2 is connected with a shaft coupling 7 through a connecting frame, the shaft coupling 7 is sleeved at one end of a screw rod 1, the screw rod 1 is sleeved with a nut pair 13 threadedly connected with a telescopic rod 6 at a position below the shaft coupling 7, the end of the telescopic rod 6 away from the shaft coupling 7 is detachably threadedly installed with a telescopic rod cap 8, the telescopic rod 6 is provided with a stroke plastic piece 4 on one side of the outer wall, and the main rod cover 12 and the stroke plastic piece 4 are installed with a plastic plug 11 sleeved at the end of the screw rod 1 away from the shaft coupling 7.

[0028] Specifically, the straight line transmission push rod comprises a planetary gear box, the motor assembly 2 is connected with the screw rod 1 through the shaft coupling 7, the screw rod 1 is slidably connected with the telescopic rod 6, after the motor is started, the straight line motion of the push rod is driven by the synchronous motion of the output shaft of the gear box and the screw rod 1 through the planetary gear box deceleration; the upper and lower protrusions of the stroke plastic sheet 4 are tightly connected on one side of the outer wall of the telescopic rod 6, so that the telescopic rod 6 can keep stable during the movement and is not easy to deviate, the main rod cover 12 is provided with a hole in the middle, the plastic plug 11 is sleeved on the end of the screw rod 1 away from the shaft coupling 7 and is installed between the main rod cover 12 and the stroke plastic sheet 11, thereby playing a limiting and fixing role, the main rod rear cap 5 is provided with a wire port 501, the wire port 501 is sleeved with a wire penetrating port 502, so as to facilitate the wire leading out and fixing of the motor assembly 2; the lowermost end of the telescopic rod 6 is further sleeved with a rubber gasket 601, which is used for increasing the friction force and sealing performance between the telescopic rod 6 and the mounting surface; when the straight line transmission push rod runs to the maximum stroke, the butterfly spring installed between the motor shaft sleeve 202 and the shaft coupling 7 and between the motor end 21 and the main rod rear cap 5 slows down the thrust and reduces the mechanical noise.

[0029] Further, the motor assembly 2 comprises a motor end 201 located below the main rod rear cap 5 and a motor shaft sleeve 202 sleeved on the lower end of the motor end 201, and the transmission mechanism comprises a connecting frame and a shaft coupling 7, the connecting frame is matched with the motor end 201 through the shaft 10 and the nut 9 to realize fixing, the shaft coupling 7 is sleeved on one end of the screw rod 1 and is connected with the motor shaft sleeve 202, so as to transmit the power of the motor to the screw rod 1.

[0030] Further, the nut pair 13 is installed at the inner bottom end of the telescopic rod 6, the screw rod 1 is a trapezoidal thread screw rod, the nut pair 13 is pushed during the rotation process to convert the circular motion into the straight line motion, so as to make the telescopic rod 6 rotate and rise, realizing the overall synchronous motion, and the thrust ball bearing and the deep groove ball bearing sleeved on the screw rod 1 ensure the stability and precision of the push rod.

[0031] Finally, it should be noted that: the above only describes the preferred embodiments of the utility model and is not used to limit the utility model, although the utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, the technical scheme recorded in the foregoing embodiments can be modified or some technical features can be replaced equivalently, any modification, equivalent replacement, improvement, etc. within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A linear actuator push rod characterized by: The utility model provides a kind of telescopic rod, including main rod (3) and the main rod rear cap (5) of screw installation in the one end of main rod (3), the other end of main rod (3) is detachably installed with main rod cover (12), main rod (3) is installed with motor assembly (2) in the position below main rod rear cap (5), motor assembly (2) is connected with shaft coupling (7) by connecting frame, shaft coupling (7) is sleeved in one end of screw rod (1), screw nut pair (13) that is screw connected with telescopic rod (6) is sleeved in the position below shaft coupling (7) on screw rod (1), telescopic rod (6) is detachably screw mounted with telescopic rod cap (8) in the end away from shaft coupling (7), travel plastic sheet (4) is equipped on the side of telescopic rod (6) outer wall, plastic plug (11) that is sleeved in the end of screw rod (1) away from shaft coupling (7) is installed between main rod cover (12) and travel plastic sheet (4).

2. The linear actuator pushrod of claim 1, wherein: The motor assembly (2) includes a motor end (201) located below the main rod rear cap (5) and a motor shaft sleeve (202) sleeved on the lower end of the motor end (201), the main rod cover (12) has a hole in the middle, the connecting frame includes a shaft (10) and a nut (9) cooperating with the shaft (10), the main rod rear cap (5) has a wire port (501) opened, and the wire port (501) has a wire port (502) sleeved.

3. The linear actuator pushrod of claim 2, wherein: The motor shaft sleeve (202) and the shaft coupling (7) and the motor end (201) and the main rod rear cap (5) are installed with butterfly elastic sheet.

4. The linear actuator of claim 2, wherein: The lower part of the nut (9) is installed with a nut retainer ring sleeved on the screw rod (1).

5. The linear actuator of claim 1, wherein: The lower end of the telescopic rod (6) is sleeved with a rubber gasket (601), and the travel plastic sheet (4) triggers the travel switch through the telescopic nut pair (13).

6. The linear actuator of claim 4, wherein: The cross-sectional pattern of the single-thread screw rod (1) is trapezoidal, and the screw rod (1) has self-locking capability.

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