A hand motor drive switchable screw drive device

Abstract

The utility model provides a manual and motor drive switchable screw rod drive arrangement belongs to screw rod drive arrangement technical field, including casing and integrated in the inside micro -reduction motor of casing, two -way overrun clutch, screw rod, bearing and bevel gear structure, bevel gear structure fixedly has the manual operating lever of protruding casing outer cover. Among them, micro -reduction motor is connected with the one end transmission of screw rod through two -way overrun clutch, and the other end of screw rod is rotatably connected with casing through bearing, and the periphery of this end is connected with manual operating lever transmission through two bevel gears of vertical engagement, and the manual operating lever can drive screw rod to rotate through drive, and because two -way overrun clutch, avoid the problem of motor reverse drive. The utility model provides screw rod drive arrangement supports motor automatic drive and manual drive two modes, enhances the applicability and flexibility of system.

Description

Technical Field

[0001] This utility model belongs to the technical field of lead screw drive devices, and particularly relates to a lead screw drive device that can be switched between manual and motor drive. Background Technology

[0002] In existing technologies, miniature DC geared motors combined with lead screw drive systems are widely used in various precision equipment, such as automated instruments, medical equipment, robots, and military shelters. These systems typically achieve precise position control by using a motor to drive a lead screw for linear motion. However, existing technologies have the following drawbacks and shortcomings:

[0003] 1) Difficult to operate manually: Many systems lack an effective manual drive mechanism. When the motor fails or manual adjustment is required, users often cannot operate the lead screw directly, or they need to overcome the internal resistance of the motor, which is laborious and inconvenient.

[0004] 2) Motor reverse drive problem: When operating manually, if the lead screw is directly connected to the motor, manually rotating the lead screw will drive the motor in reverse, which may cause damage to the motor or increase the operating torque and reduce the reliability of the system.

[0005] 3) Complex structure: Some systems attempt to switch between manual and motor drive through clutches or disengagement devices, but these devices are often complex in structure, expensive, and may introduce additional friction or wear points, affecting the system's lifespan and accuracy.

[0006] 4) Space constraints: In micro-applications, such as portable devices or compact machinery, existing disengagement devices may take up too much space and are difficult to integrate. Utility Model Content

[0007] The purpose of this invention is to solve the problems of difficult manual operation, reverse motor drive during manual driving, complex structure, and limited space. It provides a lead screw drive device that can switch between manual and motor drive, including a housing. A miniature geared motor is installed inside the housing. The output shaft of the miniature geared motor is connected to one end of the lead screw through a bidirectional overrunning clutch. The other end of the lead screw is rotatably connected to the housing, and a manual operating lever extending to the outside of the housing is connected to the outer periphery of the other end through a bevel gear structure. The manual operating lever is used to manually drive the bearing to rotate.

[0008] Furthermore, the bevel gear structure includes two bevel gears that mesh perpendicularly to each other, a manual operating lever fixed to the vertically placed bevel gear, and a horizontally placed bevel gear integrally fixed to the outer periphery of the lead screw.

[0009] Furthermore, the manual operating lever is a round bar, and the end face of the round bar facing away from the bevel gear has an internal hexagonal groove to facilitate driving the round bar to rotate.

[0010] Furthermore, a bearing is provided on one side of the housing, and the lead screw is rotatably connected to the housing at the end with the bevel gear structure via the bearing.

[0011] Compared with the prior art, the beneficial effects of this utility model are mainly reflected in:

[0012] 1. This utility model uses a two-way overrunning clutch so that the screw movement will not drive the motor during manual operation, thus protecting the motor and greatly reducing the operating torque, making manual adjustment easy and convenient.

[0013] 2. This utility model integrates a planetary gear reducer motor and a two-way overrunning clutch, which occupies little space and is suitable for micro devices.

[0014] 3. The lead screw drive device provided by this utility model supports both automatic motor drive and manual drive modes, enhancing the applicability and flexibility of the system.

[0015] 4. This utility model adopts a two-way overrunning clutch, which has a simple mechanical structure, reduces failure points, and ensures long-term stable operation. Attached Figure Description

[0016] Figure 1 This is an exploded view of the structure of a lead screw drive device that can be switched between manual and motor drive according to this utility model.

[0017] The components include: 1. Housing; 2. Miniature geared motor; 3. Two-way overrunning clutch; 4. Lead screw; 5. Bearing; 6. Bevel gear structure; 7. Manual operating lever; and 8. Housing cover. Detailed Implementation

[0018] The following is a more detailed description of a lead screw drive device that can be switched between manual and motor drive, with reference to the schematic diagrams, which illustrate preferred embodiments of the present invention. It should be understood that those skilled in the art can modify the present invention described herein while still achieving the advantageous effects of the present invention. Therefore, the following description should be understood as being of general knowledge to those skilled in the art and is not intended to limit the present invention.

[0019] like Figure 1 As shown, a lead screw drive device that can be switched between manual and motor drive includes a housing 1, a micro geared motor 2, a lead screw 4, a bearing 5, a two-way overrunning clutch 3, a bevel gear structure 6, and a manual operating lever 7.

[0020] The miniature geared motor 2, lead screw 4, bearing 5, bidirectional overrunning clutch 2, and bevel gear structure 6 are integrated inside the housing 1. Located at the left end of the housing 1, the output shaft of the miniature geared motor 2 is connected to one end of the lead screw 4 via the bidirectional overrunning clutch 3, and the other end of the lead screw 4 is connected to the right end of the housing 1 via the bearing 5, ensuring stability and accuracy.

[0021] The bevel gear structure 6 includes two bevel gears meshing perpendicularly at 90°. The horizontally placed bevel gear is integrally mounted on the outer periphery of the end where the lead screw 4 connects to the bearing 5, while the vertically placed bevel gear is fixed to one end of the manual operating lever 7. The outer cover 8 of the housing 1 has a through hole, through which the other end of the manual operating lever 7 extends out of the housing 1, facilitating manual rotation of the lead screw 4.

[0022] This utility model sets the manual operating lever 7 as a round bar. In order to facilitate manual rotation of the round bar, we have an internal hexagonal groove on the end surface of the round bar that extends out of the housing 1. The user can drive the round bar to rotate by using an external hexagonal wrench.

[0023] The miniature geared motor 2 uses conventional planetary gears, providing high torque output and a compact structure.

[0024] The bidirectional overrunning clutch 3 is existing technology used to realize the power transmission or disengagement between the micro geared motor 2 and the lead screw 4. This device includes a gear clutch, a driven plate, and a motor release shaft, wherein the motor release shaft has a clutch function. When the micro geared motor 2 is working, the motor release shaft is engaged, and power is transmitted to the lead screw 4; when manually operated, the motor release shaft disengages, and the movement of the lead screw 4 will not drive the micro geared motor 2, thus avoiding the problem of reverse motor drive.

[0025] This utility model device has the following two driving modes:

[0026] Motor drive mode: When the micro geared motor 2 starts, it is reduced in speed by planetary gears and then drives the motor separation shaft in the bidirectional overrunning clutch 3 to engage, thereby driving the lead screw 4 to rotate and thus pushing the load forward or backward.

[0027] Manual drive mode: When the user rotates the round bar, the bevel gear structure 6 transmits the motion to the lead screw 4. However, since the two-way overrunning clutch 3 is disengaged, the movement of the lead screw 4 will not drive the micro gear motor 2 in the reverse direction, thereby reducing the manual operation effort.

[0028] The above are merely preferred embodiments of this utility model and do not constitute any limitation on this utility model. Any equivalent substitutions or modifications made by those skilled in the art to the technical solutions and contents disclosed in this utility model without departing from the scope of the technical solutions of this utility model shall still fall within the protection scope of this utility model.

Claims

1. A lead screw drive device that can be switched between manual and motor drive, characterized in that, The device includes a housing, inside which is a miniature geared motor. The output shaft of the miniature geared motor is connected to one end of a lead screw via a bidirectional overrunning clutch. The other end of the lead screw is rotatably connected to the housing, and a manual operating lever extending to the outside of the housing is connected to the outer periphery of the lead screw via a bevel gear structure. The manual operating lever is used to manually drive the bearing to rotate.

2. The lead screw drive device that can be switched between manual and motor drive according to claim 1, characterized in that, The bevel gear structure includes two bevel gears that mesh perpendicularly to each other. The manual operating lever is fixed to the vertically placed bevel gear, and the horizontally placed bevel gear is integrally fixed to the outer periphery of the lead screw.

3. The lead screw drive device that can be switched between manual and motor drive according to claim 2, characterized in that, The manual operating lever is a round bar, and the end face of the round bar facing away from the bevel gear has an internal hexagonal groove to facilitate driving the round bar to rotate.

4. The lead screw drive device that can be switched between manual and motor drive according to claim 1, characterized in that, A bearing is provided on one side of the housing, and the lead screw is rotatably connected to the housing at the end with the bevel gear structure via the bearing.

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