A connection structure of a motor and a winding reel, a winding and unwinding device and a window cleaning robot base station

Abstract

A motor and a winding connection structure, a winding and unwinding device and a window cleaning robot base station, relate to the technical field of cleaning equipment. The connection structure comprises: an annular seat connected to the winding, the inner side circumferential wall of which constitutes a bearing hole and is provided with a plurality of grooves in the circumferential direction; a rotating seat connected to the power output end of the motor, the lower end of which is provided with a cylindrical shaft section, the cylindrical shaft section is installed in the bearing hole with a gap; a locking member is arranged on the cylindrical shaft section and can move radially; an elastic element is arranged in the rotating seat and applies an elastic force to the locking member; the locking member can extend into or abut against the groove of the annular seat under the action of the elastic force, so that the rotating seat and the annular seat rotate synchronously; when the torque between the annular seat and the rotating seat makes the radial force borne by the locking member overcome the elastic force, the locking member retracts, and the annular seat and the rotating seat can rotate relatively. The utility model can realize manual winding on the basis of retaining the automatic winding function, thereby reducing the working energy consumption.

Description

Technical Field

[0001] This utility model relates to the field of cleaning equipment technology, and in particular to a connection structure between a motor and a winding reel, a winding and unwinding device, and a base station for a window cleaning robot. Background Technology

[0002] Existing window cleaning robots are typically equipped with a base station for retrieval. This base station is connected to the robot via a rope to catch it in case it accidentally falls while cleaning windows outdoors, preventing a crash. For easy rope retrieval, the base station also includes a rope winding / unwinding device equipped with a motor. This device drives a reel to rotate and rewind the rope. To reduce speed and increase torque, a reduction gear set is usually fitted to the motor, with the output gear connected to the reel. However, due to structural limitations (usually using a gear set with a large reduction ratio), after the motor stops working, the reduction ratio amplifies the static friction torque of the motor rotor by tens or even hundreds of times. When the user tries to pull the rope to rotate the reel to unwind the rope, they will experience significant rotational resistance, making it difficult to pull and hindering manual rope unwinding. This necessitates relying on the motor to drive the reel for unwinding, resulting in high energy consumption. Utility Model Content

[0003] One of the purposes of this utility model is to provide a connection structure between a motor and a winding reel that enables manual unwinding while retaining the automatic winding function, thereby reducing energy consumption.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A connection structure between a motor and a winding reel includes:

[0006] The ring seat is coaxially fixed to the winding reel, and its inner circumferential wall forms a bearing hole and has several grooves along the circumference.

[0007] A rotating base is coaxially fixedly connected to the power output end of the motor, and a cylindrical shaft section extends from its lower end. The cylindrical shaft section is fitted into the bearing hole with a clearance fit.

[0008] A locking element is provided on the cylindrical shaft section of the rotating seat and can move in the radial direction of the cylindrical shaft section of the rotating seat.

[0009] An elastic element is disposed within the rotating seat and applies an elastic force to the locking member to move it outward.

[0010] The locking member can extend into or abut against the groove of the annular seat under the action of the elastic force, so that the rotating seat and the annular seat rotate synchronously;

[0011] When the torque between the annular seat and the rotating seat causes the radial force on the locking member to overcome the elastic force, the locking member moves radially back, and the annular seat and the rotating seat can rotate relative to each other.

[0012] Furthermore, the locking element is a columnar locking rod or a spherical ball.

[0013] Furthermore, the number of locking components is multiple and they are grouped in pairs, with the two locking components in each group spaced apart along a straight line perpendicular to the axis of the rotating seat.

[0014] Furthermore, the number of grooves is multiple and they are evenly spaced along the circumferential wall of the inner side of the annular seat.

[0015] Furthermore, a connecting rod is coaxially connected to the lower end of the cylindrical shaft section of the rotating seat. The lower end of the connecting rod passes through the connecting hole at the lower end of the annular seat and is limited by a detachable limiting member. There is an axial gap between the limiting member and the lower end face of the annular seat.

[0016] Furthermore, the upper end of the rotating seat is provided with a first anti-rotation groove, and the power output end of the motor is provided with a first anti-rotation part that is adapted to the first anti-rotation groove.

[0017] Furthermore, the lower end of the annular seat is provided with a second anti-rotation groove, and the upper end of the winding reel is provided with a second anti-rotation part that matches the second anti-rotation groove.

[0018] Furthermore, the cylindrical shaft section of the rotating seat is provided with a radially extending guide groove, and the locking member is installed in the guide groove and can slide therein.

[0019] The second objective of this utility model is to provide a winding and unwinding device, which includes a winding reel and a motor for driving the winding reel to rotate, wherein the winding reel and the motor are connected by the connection structure described above.

[0020] Furthermore, the motor is a geared motor, in which case the power output end of the motor is the output shaft of the geared motor; or, the power output shaft of the motor is connected to a reduction gear set, and the rotating seat is coaxially and fixedly connected to the output gear of the reduction gear set, in which case the power output end of the motor is the output gear of the reduction gear set.

[0021] The third objective of this utility model is to provide a window cleaning robot base station, which includes a base station body and the above-mentioned cable winding and unwinding device is provided on the base station body.

[0022] The working principle of this utility model is as follows: When the motor drives the rotating seat to rotate in the forward direction, the force of the elastic element can cause the locking part to extend into or abut against the groove of the annular seat. Through the cooperation between the locking part and the groove, the torque is transmitted from the rotating seat to the annular seat, causing the annular seat to rotate synchronously, thereby driving the winding reel to rotate and achieving synchronous rotation for winding. When the motor stops (i.e., does not provide driving force), and an external force pulls the rope in an attempt to make the winding reel rotate (passively), the pulling force can be converted into a radial component force acting on the locking part through the rope, winding reel, and annular seat. This force overcomes the force of the elastic element and squeezes the locking part, forcing it to retract into the rotating seat, causing the rotating seat and annular seat to disengage and rotate relative to each other, thereby achieving slippage and unwinding.

[0023] This invention utilizes the engagement and disengagement mechanism between the elastic locking element and the groove to enable the motor and the winding reel to work together during winding and the winding reel to disengage from the motor during unwinding. This provides both automatic winding and manual unwinding functions, eliminating the need for motor drive during unwinding and reducing energy consumption. Attached Figure Description

[0024] Figure 1 A perspective view of the wire take-up and unwinding device;

[0025] Figure 2 Disassembly of the take-up and unwinding device Figure 1 ;

[0026] Figure 3 Disassembly of the take-up and unwinding device Figure 2 ;

[0027] Figure 4 Decomposition of the ring seat and the rotary seat Figure 1 ;

[0028] Figure 5 Decomposition of the ring seat and the rotary seat Figure 2 ;

[0029] Figure 6 This is a sectional view of the rotary seat;

[0030] Figure 7 This is a cross-sectional view of the annular seat and the rotary seat;

[0031] Figure 8 This is a schematic diagram of the structure of the motor and the reduction gear set.

[0032] In the picture:

[0033] 1—Annular seat 1a—Bearing bore

[0034] 1b - Groove; 1c - Connecting hole

[0035] 2—Rotating seat 2a—Cylindrical shaft section

[0036] 2a1—Guide groove 2b—Connecting rod

[0037] 3—Locking element; 4—Elastic element

[0038] 5 — Limiting component 6a — First anti-rotation groove

[0039] 6b – First anti-rotation section; 7a – Second anti-rotation groove

[0040] 7b - Second anti-rotation section; 8 - Reel

[0041] 9 – Motor; 10 – Reduction gear set. Detailed Implementation

[0042] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to embodiments and accompanying drawings. The content mentioned in the embodiments is not intended to limit the present invention.

[0043] Example 1

[0044] This embodiment provides a connection structure between a motor and a winding reel. The structure includes a separable transmission mechanism disposed between the power output end of the motor 9 and the winding reel 8. This mechanism is configured to achieve rotational linkage when the motor 9 is driven, and to automatically separate and slip when the winding reel 8 is pulled by an external force. This achieves synchronized rotation of the motor 9 and the winding reel 8 during winding, and allows the winding reel 8 to disengage from the motor 9 and rotate freely to release the rope during unwinding. Thus, manual unwinding is achieved while retaining the automatic winding function, reducing energy consumption.

[0045] Specifically, such as Figure 4-7 As shown, the connection structure between the motor and the winding reel includes an annular seat 1, a rotating seat 2, a locking element 3, and an elastic element 4. The annular seat 1 and the rotating seat 2 are coaxially and rotatably connected, respectively connecting the winding reel 8 and the power output end of the motor 9. Furthermore, the annular seat 1 and the winding reel 8 are coaxially and fixedly connected to achieve synchronous rotation. Figure 5 , 7As shown, the inner circumferential wall of the annular seat 1 forms a bearing hole 1a, and the inner circumferential wall (i.e., the side wall of the bearing hole 1a) is provided with a plurality of grooves 1b along the circumferential direction. In this embodiment, the number of grooves 1b is multiple (e.g., six), and these grooves 1b are evenly spaced along the circumferential direction of the inner circumferential wall of the annular seat 1. The rotating seat 2 is coaxially fixedly connected to the power output end of the motor 9 so as to be driven by it. A cylindrical shaft section 2a extends from the lower end of the rotating seat 2, and the cylindrical shaft section 2a is fitted into the bearing hole 1a with a clearance fit so as to facilitate the coaxial relative rotation of the rotating seat 2 and the annular seat 1. The locking member 3 is radially movable on the cylindrical shaft section 2a of the rotating seat 2, that is, the locking member 3 can move in the radial direction of the cylindrical shaft section 2a of the rotating seat 2. The locking member 3 can be a columnar locking rod or a spherical ball. When the locking element 3 is a locking rod, its end can be engaged in the groove 1b; when the locking element 3 is a ball, a portion of its spherical surface (preferably not exceeding a hemisphere) can fall into the groove 1b and contact the groove wall, thus achieving transmission engagement. Additionally, when the locking element 3 is a locking rod, its end can be hemispherical to facilitate engagement and disengagement with the groove 1b. In this embodiment, the locking element 3 is a spherical ball (see...). Figure 6 , 7 To ensure that the locking element 3 moves radially along the cylindrical shaft segment 2a, this embodiment provides a guide groove 2a1 extending radially in the cylindrical shaft segment 2a of the rotating seat 2. The locking element 3 is installed in the guide groove 2a1 and can slide linearly along the guide groove 2a1. The elastic element 4 can be a compressible and rebounding helical spring (i.e., a compression spring), which is disposed in the rotating seat 2 (e.g., disposed in the guide groove 2a1) and can apply an elastic force to the locking element 3 to move it outward (i.e., to move it outward in the radial direction of the cylindrical shaft segment 2a of the rotating seat 2). In this embodiment, the number of locking elements 3 is multiple (e.g., two) and they are arranged in pairs. The two locking elements 3 in each pair are spaced apart along a straight line perpendicular to the axis of the rotating seat 2 (usually disposed on both sides of the rotating seat 2). The elastic element 4 can be disposed between the two locking elements 3 in each pair. For example, the two ends of the elastic element 4 are respectively connected (e.g., abutted or fixed) to the two locking elements 3; or, as Figure 6 , 7As shown, a stop is provided inside the rotating seat 2. On each side of the stop, a combination structure comprising an elastic element 4 and a locking member 3 is provided. One end of the elastic element 4 is connected (e.g., abutting or fixing) to the stop, and the other end is connected (e.g., abutting or fixing) to the locking member 3. During automatic reel-in, the locking member 3, under the action of elastic force, can extend into or abut against the groove 1b of the annular seat 1, so that the rotating seat 2 and the annular seat 1 rotate synchronously. During manual unwinding, when the torque between the annular seat 1 and the rotating seat 2 causes the radial force on the locking member 3 to overcome the elastic force, the locking member 3 can move radially and retract, allowing the annular seat 1 and the rotating seat 2 to rotate relative to each other. The inner wall of the groove 1b can be configured as an arc shape or a hemisphere, which facilitates the engagement and disengagement of the locking member 3 and the groove 1b.

[0046] It should be noted that, in this embodiment, the output shaft of the motor 9 is connected to a reduction gear set 10 (see...). Figure 1-3 and Figure 8 The rotating seat 2 is coaxially and fixedly connected to the output gear of the reduction gear set 10. In this case, the power output end of the motor 9 is the output gear (or output shaft) of the reduction gear set 10. In some other embodiments, the motor 9 can be a geared motor, and the rotating seat 2 is directly fixed to the output shaft of the geared motor. In this case, the power output end of the motor 9 is the output shaft of the geared motor. When the geared motor or reduction gear set 10 is not energized, the large reduction ratio inside significantly amplifies the static friction torque of the motor rotor, generating a huge rotational resistance. This resistance is sufficient to provide the necessary braking support for the rotating seat 2 under normal operating load, preventing it from rotating accidentally. This allows the rotating seat 2 to remain relatively stationary when the motor 9 is not driven, thus providing the necessary conditions for the ring seat 1 to rotate relative to it and for the locking member 3 to retract.

[0047] The working principle of the connection structure in this embodiment is as follows: When the motor 9 drives the rotating seat 2 to rotate in the forward direction (forward rotation), the locking member 3 and the groove 1b cooperate to drive the annular seat 1 to rotate synchronously, thereby driving the winding reel 8 to rotate (forward rotation) to achieve winding; when the motor 9 stops (i.e., does not provide driving force), the winding reel 8 is pulled by the connected rope, and when the radial component of the pulling force on the locking member 3 overcomes the force of the elastic element 4, the annular seat 1 can rotate relative to the rotating seat 2, squeezing the locking member 3 to retract it into the rotating seat 2, thereby disengaging the annular seat 1 from the rotating seat 2, and the winding reel 8 can rotate freely (reverse rotation), so that the rope can be pulled out normally to achieve winding.

[0048] In this embodiment, as Figure 4 , 6As shown, a connecting rod 2b is coaxially fixedly connected to the lower end of the cylindrical shaft section 2a of the rotating seat 2. The lower end of the annular seat 1 has a connecting hole 1c. The lower end of the connecting rod 2b passes through the connecting hole 1c and is limited by a detachable limiting member 5. There is an axial gap between the limiting member 5 and the lower end face of the annular seat 1 (this gap does not need to be too large, only enough to ensure that the rotating seat 2 and the annular seat 1 can rotate relative to each other). This ensures the reliability of the connection between the rotating seat 2 and the annular seat 1, while allowing them to rotate relative to each other. The limiting member 5 can be made of readily available materials and has good reliability, such as washers and screws.

[0049] The coaxial fixed connection between the rotating base 2 and the power output end of the motor 9 can employ any conventional circumferential limiting structure capable of transmitting torque. As a preferred embodiment, such as... Figure 3 , 5 As shown, the upper end of the rotary seat 2 is provided with a first anti-rotation groove 6a, and the power output end of the motor 9 (such as the output gear of the reduction gear set 10) is provided with a first anti-rotation part 6b that matches the first anti-rotation groove 6a. Through the cooperation of the first anti-rotation part 6b and the first anti-rotation groove 6a, relative rotation between the rotary seat 2 and the power output end of the motor 9 can be prevented, thereby achieving synchronous rotation. The first anti-rotation groove 6a and the first anti-rotation part 6b can adopt compatible rectangular or flat structures. It is understood that the coaxial fixed connection can also be achieved using spline connections, key connections, or interference fits, or other equivalent methods.

[0050] The coaxial fixed connection between the annular seat 1 and the winding reel 8 can employ any conventional torque-transmitting circumferential limiting structure in the art. As a preferred embodiment, such as... Figure 2 , 4 As shown, the lower end of the annular seat 1 is provided with a second anti-rotation groove 7a, and the upper end of the winding reel 8 is provided with a second anti-rotation part 7b that matches the second anti-rotation groove 7a. Through the cooperation of the second anti-rotation groove 7a and the second anti-rotation part 7b, relative rotation between the annular seat 1 and the winding reel 8 can be prevented, thus achieving synchronous rotation. The second anti-rotation groove 7a and the second anti-rotation part 7b can adopt a matching quincunx structure. It is understood that the coaxial fixed connection can also be achieved using other equivalent methods such as spline connection, key connection, or interference fit.

[0051] The connection structure of this embodiment is relatively simple. Through the engagement and disengagement mechanism of the elastic locking member 3 and the groove 1b, the motor 9 and the winding reel 8 are linked during winding, and the winding reel 8 is disengaged from the motor 9 during unwinding. This enables it to have both automatic winding and manual unwinding functions. No motor 9 is required to drive the unwinding, thereby reducing energy consumption.

[0052] Example 2

[0053] like Figure 1-8As shown, this embodiment provides a cable winding and unwinding device, which includes a cable reel 8 and a motor 9 for driving the cable reel 8 to rotate. The cable reel 8 and the motor 9 are connected by the connection structure of Embodiment 1. A rope is wound on the cable reel 8, one end of which is fixed to the cable reel 8, and the other end (free end) is used to connect to external equipment (such as a window cleaning robot).

[0054] Similar to Embodiment 1, an alternative to the drive structure (motor 9) is: the output shaft of motor 9 is connected to a reduction gear set 10 (see...). Figure 8 Alternatively, the rotating seat 2 can be coaxially and fixedly connected to the output gear of the reduction gear set 10; or, the motor 9 can be a reduction motor, and the rotating seat 2 can be directly fixed to the output shaft of the reduction motor.

[0055] Example 3

[0056] This embodiment provides a window cleaning robot base station, which includes a base station body and a cable reel-up / deelution device as described in Embodiment 2. A window cleaning robot is placed inside the base station body, and the free end (terminal end) of the rope connected to the cable reel 8 is fixedly connected to the window cleaning robot.

[0057] The above description is merely a preferred embodiment of this utility model and does not constitute any limitation on this utility model. Any content that does not depart from the technical solution of this utility model shall still fall within the patent scope of this utility model.

Claims

1. A connection structure between a motor and a winding reel, characterized in that, include: The annular seat (1) is coaxially fixed to the winding reel (8), and its inner circumferential wall forms a bearing hole (1a) and has several grooves (1b) arranged along the circumference. The rotating seat (2) is coaxially fixedly connected to the power output end of the motor (9), and its lower end extends into a cylindrical shaft section (2a). The cylindrical shaft section (2a) is installed in the bearing hole (1a) with clearance fit. The locking element (3) is provided on the cylindrical shaft section (2a) of the rotating seat (2) and can move in the radial direction of the cylindrical shaft section (2a) of the rotating seat (2); An elastic element (4) is provided inside the rotating seat (2) and applies an elastic force to the locking member (3) to move it outward; The locking member (3) can extend into or abut against the groove (1b) of the annular seat (1) under the action of the elastic force, so that the rotating seat (2) and the annular seat (1) rotate synchronously; When the torque between the annular seat (1) and the rotating seat (2) causes the radial force on the locking member (3) to overcome the elastic force, the locking member (3) can move radially back so that the annular seat (1) and the rotating seat (2) can rotate relative to each other.

2. The connection structure between the motor and the winding reel according to claim 1, characterized in that, The locking element (3) is a columnar locking rod or a spherical ball.

3. The connection structure between the motor and the winding reel according to claim 1, characterized in that, The number of locking elements (3) is multiple and they are grouped in pairs. The two locking elements (3) in each group are distributed at intervals along a straight line perpendicular to the axis of the rotating seat (2).

4. The connection structure between the motor and the winding reel according to claim 1, characterized in that, The number of grooves (1b) is multiple and they are evenly spaced along the inner circumferential wall of the annular seat (1).

5. The connection structure between the motor and the winding reel according to claim 1, characterized in that, The upper end of the rotating seat (2) is provided with a first anti-rotation groove (6a), and the power output end of the motor (9) is provided with a first anti-rotation part (6b) that is adapted to the first anti-rotation groove (6a).

6. The connection structure between the motor and the winding reel according to claim 1, characterized in that, The lower end of the annular seat (1) is provided with a second anti-rotation groove (7a), and the upper end of the winding reel (8) is provided with a second anti-rotation part (7b) that is adapted to the second anti-rotation groove (7a).

7. The connection structure between the motor and the winding reel according to claim 1, characterized in that, The cylindrical shaft section (2a) of the rotating seat (2) is provided with a radially extending guide groove (2a1), and the locking member (3) is installed in the guide groove (2a1).

8. A winding and unwinding device, comprising a winding reel (8) and a motor (9) for driving the winding reel (8) to rotate, characterized in that, The winding reel (8) and the motor (9) are connected by a connection structure as described in any one of claims 1-7.

9. The take-up and unwinding device according to claim 8, characterized in that, The motor (9) is a geared motor; or, the power output shaft of the motor (9) is connected to a reduction gear set (10), and the rotating seat (2) is coaxially and fixedly connected to the output gear of the reduction gear set (10).

10. A window cleaning robot base station, comprising a base station body, characterized in that, The base station body is equipped with the cable take-up and release device as described in claim 8 or 9.

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