Automatic retractable roller brush structure

Abstract

The present invention discloses an automatically retractable roller brush structure, comprising a roller brush driving cylinder, a driven telescopic cylinder, a rotating bearing, a transmission mechanism and a fixed block, wherein the roller brush driving cylinder is sleeved on the outside of the driven telescopic cylinder and can be retracted along the axial direction of the roller brush driving cylinder; the rotating bearing is fixedly connected to the driven telescopic cylinder; one end of the transmission mechanism is fixedly connected to the fixed block; a brush groove and a brush strip are axially arranged on the outer wall of the roller brush driving cylinder, the brush strip is clamped on the brush groove, the brush strip comprises a plurality of movable brush strips and a plurality of fixed brush strips, the protruding end of the movable brush strip is fixed on the protruding end of the driven telescopic cylinder, when the roller brush driving cylinder rotates, the driven telescopic cylinder is driven to rotate, and the driven telescopic cylinder rotates on the transmission mechanism through the rotating bearing to realize axial displacement.

Description

Technical Field

[0001] The invention relates to the field of roller brushes, and in particular to an automatically telescopic roller brush structure. Background Art

[0002] Roller brushes are commonly used cleaning or painting parts that can be installed on different tools to achieve different functions. Due to the diverse application scenarios of roller brushes, people have different requirements for the width of roller brushes for different usage environments. Especially for sweepers, installing a roller brush with adjustable width can adapt to complex cleaning environments and improve cleaning efficiency. Therefore, it is of great significance to create a roller brush with adjustable width.

[0003] The prior art discloses a laterally adjustable roller brush structure, which adjusts the roller brush width by arranging two roller brushes in parallel and then laterally adjusting the relative positions of the two roller brushes. Due to the position difference between the two roller brushes, the rear roller brush will always miss a part of the brush when in use. There is no single roller brush product with adjustable width on the market.

[0004] It can be seen that the existing technology still needs to be improved and enhanced. Summary of the invention

[0005] In view of the above-mentioned deficiencies of the prior art, an object of the present invention is to provide an automatically retractable roller brush structure, aiming to solve the problem that there is no single roller brush product with adjustable width in the prior art.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] An automatically retractable roller brush structure comprises a roller brush driving cylinder, a driven telescopic cylinder, a rotating bearing, a transmission mechanism and a fixed block; the roller brush driving cylinder is sleeved on the outside of the driven telescopic cylinder, and the driven telescopic cylinder can be retracted along the axial direction of the roller brush driving cylinder; the outer periphery of the rotating bearing is fixedly connected to the inner wall of the driven telescopic cylinder; the transmission mechanism is used to drive the driven telescopic cylinder to reciprocate along the axial direction of the roller brush driving cylinder; the fixed block is arranged on one side of the driven telescopic cylinder and is fixedly connected to one end of the transmission mechanism.

[0008] The described automatic telescopic roller brush structure, wherein the extended end of the driven telescopic cylinder is connected to a connecting piece having a radius equal to the outer diameter of the roller brush driving cylinder, and the connecting piece is connected to one end of the roller brush driving cylinder; the outer diameter of the driven telescopic cylinder is adapted to the inner diameter of the roller brush driving cylinder.

[0009] The automatic telescopic roller brush structure is described, wherein a plurality of brush strips and brush grooves extending along the axial direction are arranged on the outer wall of the roller brush driving cylinder, and the brush strips are clamped on the brush grooves and can slide along the brush grooves.

[0010] The automatically retractable roller brush structure, wherein the brush strips include a movable brush strip and a fixed brush strip, and the extended ends of the brush strips are fixed on the extended ends of the driven telescopic cylinder.

[0011] The automatically retractable roller brush structure, wherein the movable brush strip and the fixed brush strip are arranged at intervals.

[0012] The automatically retractable roller brush structure described above, wherein a plurality of clamping blocks for clamping the brush strips are arranged on the outer peripheral wall of the connecting piece.

[0013] The automatically retractable roller brush structure, wherein the length of the brush strip is not less than the length of the driven telescopic cylinder.

[0014] The automatically retractable roller brush structure, wherein the brush groove is a trapezoidal groove.

[0015] The automatic retractable roller brush structure, wherein the transmission mechanism includes a front axle, a one-way rotating device and a rear axle, one end of the front axle is connected to the rear axle through the one-way rotating device, and the other end of the front axle is connected to a fixed block.

[0016] The automatically retractable roller brush structure, wherein the one-way rotating device is a ratchet mechanism.

[0017] Beneficial effects:

[0018] The present invention provides an automatically retractable roller brush structure, which adopts a sleeve and a movable brush strip design, so that a single roller brush structure can be retracted to change its width, and by further controlling the rotation direction and rotation speed of the roller brush driving cylinder and the transmission mechanism, precise control of the roller brush width is achieved, thereby greatly improving the working performance of the roller brush and being better adapted to different environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A structural diagram of the automatically retractable roller brush structure provided by the present invention.

[0020] Figure 2 The diagram shows the extended state of the automatically retractable roller brush structure.

[0021] Figure 3 for Figure 2 Cross-sectional view along the A-A' direction.

[0022] Figure 4 This is the structural diagram of the transmission mechanism.

[0023] Figure 5 This is a diagram of the idling state of the rotary bearing on the rear axle.

[0024] Figure 6 for Figure 5Cross-sectional view along the BB' direction. DETAILED DESCRIPTION

[0025] The present invention provides an automatically retractable roller brush structure. To make the purpose, technical solution and effect of the present invention clearer and more specific, the present invention is further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0026] In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, and a specific direction structure and operation, and therefore, cannot be understood as limiting the present invention. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0027] In the present invention, the "extended end of the driven telescopic cylinder" refers to the end of the driven telescopic cylinder extending away from the roller brush driving cylinder, and the "extended end of the brush" refers to the end of the brush extending away from the roller brush driving cylinder.

[0028] See also Figure 1 and Figure 2 The present invention provides an automatically retractable roller brush structure.

[0029] An automatically retractable roller brush structure comprises a roller brush driving cylinder 1, a driven telescopic cylinder 2, a rotary bearing 3, a transmission mechanism 4 and a fixed block 5; the roller brush driving cylinder 1 is sleeved on the outside of the driven telescopic cylinder 2, and the driven telescopic cylinder 2 can be retracted along the axial direction of the roller brush driving cylinder 1; the outer periphery of the rotary bearing 3 is fixedly connected to the inner wall of the driven telescopic cylinder 2; the transmission mechanism 4 is used to drive the driven telescopic cylinder 2 to reciprocate along the axial direction of the roller brush driving cylinder 1; the fixed block 5 is arranged on one side of the driven telescopic cylinder 2 and is fixedly connected to one end of the transmission mechanism 4.

[0030] Driven by external force, the rotary bearing 3 rotates along the transmission mechanism 4, displaces on the transmission mechanism 4, and then drives the driven telescopic cylinder 2 to rotate and displace, realizing the automatic telescopic function of the roller brush structure. One end of the transmission mechanism 4 is connected to the fixed block 5, and the rotation of the transmission mechanism 4 can be more conveniently controlled through the fixed block 5. The connecting arm of the rotary bearing 3 is connected to the inner wall of the driven telescopic cylinder 2 near the open end, and the driven telescopic cylinder 2 can be extended outward as much as possible, so that the roller brush has the maximum telescopic degree. The actual connection position of the connecting arm and the inner wall of the driven telescopic cylinder 2 can also be adjusted according to actual conditions, so that it has the best mechanical structure and the most suitable maximum elongation.

[0031] In one embodiment, the extended end of the driven telescopic cylinder 2 is connected with a connector 21 having a radius equal to the outer diameter of the roller brush driving cylinder 1, and the connector 21 is connected to one end of the roller brush driving cylinder 1; the outer diameter of the driven telescopic cylinder 2 is adapted to the inner diameter of the roller brush driving cylinder 1.

[0032] One end of the roller brush driving cylinder 1 is connected to the connecting piece 21 of the driven telescopic cylinder 2. When the roller brush driving cylinder 1 is driven to rotate by external force, the connecting part of the roller brush driving cylinder 1 and the connecting piece 21 of the driven telescopic cylinder 2 is equivalent to a transmission part, which then drives the driven telescopic cylinder 2 to rotate. When the fixed block 5 remains stationary, the transmission mechanism 4 and the rotating bearing 3 have different rotation speeds, and the rotating bearing 3 can rotate along the transmission mechanism 4, driving the driven telescopic cylinder 2 to move. The outer diameter of the driven telescopic cylinder 2 is adapted to the inner diameter of the roller brush driving cylinder 1, so that the driven telescopic cylinder 2 and the roller brush driving cylinder 1 can fit tightly, improving the stability of the automatic telescopic roller brush structure.

[0033] The essence of the driven telescopic cylinder 2 extending outward and retracting inward is that the rotation speeds of the driven telescopic cylinder 2 and the transmission mechanism 4 are different.

[0034] In another embodiment, the roller brush driving cylinder 1 and the fixed block 5 are driven to rotate by different driving devices. When the rotation speed of the driven telescopic cylinder 2 is the same as the rotation speed of the transmission mechanism 4, the driven telescopic cylinder 2 and the transmission mechanism 4 will not be relatively displaced, and the driven telescopic cylinder 2 will remain in place and no longer extend and retract, thereby maintaining the width of the roller brush. Because the driven telescopic cylinder 2 is driven by the roller brush driving cylinder 1, the extension and retraction of the driven telescopic cylinder 2 can be achieved by controlling the relative rotation speed and rotation direction of the roller brush driving cylinder 1 and the transmission mechanism 4. The roller brush driving cylinder 1 can switch the rotation direction, and the transmission mechanism 4 can only rotate forward or remain stationary. When the roller brush driving cylinder 1 is controlled to rotate backward, the driven telescopic cylinder 2 retracts inward and the roller brush becomes narrower; when the roller brush driving cylinder 1 is controlled to rotate forward and the transmission mechanism 4 remains stationary, the driven telescopic cylinder 2 extends outward and the roller brush becomes wider; when the roller brush driving cylinder 1 is controlled to rotate forward and the transmission mechanism 4 is controlled to rotate forward, the rotation speed of the roller brush driving cylinder 1 is greater than the rotation speed of the transmission mechanism 4, the driven telescopic cylinder 2 slowly extends outward and the roller brush slowly becomes wider; when the roller brush driving cylinder 1 is controlled to rotate forward and the transmission mechanism 4 is controlled to rotate forward, the rotation speed of the roller brush driving cylinder 1 is controlled to be less than the rotation speed of the transmission mechanism 4, the driven telescopic cylinder 2 slowly retracts inward and the roller brush slowly becomes narrower; when the rotation speed of the roller brush driving cylinder 1 is controlled to be equal to the rotation speed of the transmission mechanism 4, the position of the driven telescopic cylinder 2 remains unchanged and the width of the roller brush remains unchanged. By controlling the rotation speeds of the roller brush driving cylinder 1 and the transmission mechanism 4 respectively, the control accuracy of the roller brush extension can be greatly improved.

[0035] A plurality of brush strips 11 and brush grooves 12 extending along the axial direction are axially arranged on the outer wall of the roller brush driving cylinder. The brush strips 11 are clamped on the brush grooves 12 and can slide along the brush grooves 12. During use, the number of brush strips 11 and brush grooves 12 can be increased according to actual needs. The arrangement of the brush grooves 12 makes it easy to remove the brush strips 11 from the roller brush driving cylinder 1 for replacement. According to the cleaning surface of different materials, the user can easily replace the brush strips 11 of different models and materials. In addition, by sliding the brush strips 11, the position of the brush strips 11 can be conveniently and quickly adjusted to adjust the roller brush range.

[0036] In one embodiment, a brush strip 11 for ejecting a brush is installed on the outer wall of the driven telescopic cylinder 2. When the driven telescopic cylinder 2 is extended from the roller brush driving cylinder 1, the brush strip 11 on the extended part of the driven telescopic cylinder 2 will eject the brush.

[0037] The brush strips include a movable brush strip 111 and a fixed brush strip 112, and the protruding end of the brush strip is fixed on the protruding end of the driven telescopic cylinder 2. The movable brush strip 111 can move with the connecting piece 21 at the protruding end of the driven telescopic cylinder 2, and acts as a transmission component between the roller brush driving cylinder 1 and the driven telescopic cylinder 2. After the roller brush driving cylinder 1 rotates, it drives the driven telescopic cylinder 2 to rotate. The driven telescopic cylinder 2 generates axial displacement due to the rotation, which reacts to the movable brush strip 111, causing the movable brush strip 111 to slide on the brush groove 12, thereby changing the roller brush width. When one end of the fixed brush strip 112 is fixed on the protruding end of the driven telescopic cylinder 2, the fixed brush strip 112 becomes the movable brush strip 111; on the contrary, when one end of the movable brush strip 111 is not fixed on the protruding end of the driven telescopic cylinder 2, it becomes the fixed brush strip 112.

[0038] In one embodiment, the base of the brush strip 11 can be made of high-strength metal material or other high-hardness material, and the movable brush strip 111 serves as the transmission part between the roller brush active cylinder 1 and the driven telescopic cylinder 2, wherein the base of the brush strip 11 is the main force-bearing part. The use of a metal or hard brush base can prevent the brush strip 11 from being easily deformed, thereby enhancing the stability of the telescopic roller brush.

[0039] In one embodiment, the base of the brush strip 11 can be installed on the roller brush device as a separate module. As a transmission part, when replacing the brush strip 11, there is no need to release the connection between the movable brush strip 111 and the telescopic driven cylinder 2, and it can be directly removed from the transmission mechanism.

[0040] The movable brush strips 111 and the fixed brush strips 112 are arranged at intervals. The movable brush strips 111 and the fixed brush strips 112 are arranged at intervals so that the movable brush strips 111 are evenly arranged on the roller brush. After displacement, the movable brush strips 111 are evenly distributed in the extended part, and the fixed brush strips 112 are also evenly distributed on the roller brush driving cylinder 1, so that the roller structure after extension is balanced in force overall.

[0041] The outer wall of the connecting member 21 is provided with a plurality of blocks 22 for clamping the brush strips. When the driven telescopic cylinder 2 extends outward, the blocks 22 move outward with the driven telescopic cylinder 2, pulling the movable brush strip 111 outward to increase the width of the rolling brush. When the driven telescopic cylinder 2 retracts inward, the blocks 22 push the movable brush strip 111 inward to shorten the width of the rolling brush.

[0042] In one embodiment, the base of the brush strip 11 has bolt holes at both ends, and the clamping block 212 can be fixedly connected to the movable brush strip 111 by bolts, or can be fixedly connected by clamping so that the movable brush strip 111 moves with the clamping block 22.

[0043] The length of the brush strip 11 is not less than the length of the driven telescopic cylinder 2. As the driven telescopic cylinder 2 extends, the connection portion between the mobile brush strip 111 and the brush groove 12 will be reduced. If the length of the brush strip 11 is insufficient, the maximum extension of the driven telescopic cylinder 2 will be limited. When the driven telescopic cylinder 2 extends to the widest part of the roller brush, the length of the brush strip 11 is insufficient, and the brush strip 11 will be detached from the brush groove 12. In actual use, when the driven telescopic cylinder 2 extends to the widest part of the roller brush, a part of the brush strip 11 is still stuck on the brush groove 12, and acts as a transmission part with sufficient strength to drive the driven telescopic cylinder 2 to rotate. In production, the manufacturer can also adjust the length of the driven telescopic cylinder 2 according to actual needs, so that its length is less than that of the roller brush active cylinder 1, so as to change the maximum extension of the roller brush. By adjusting the length of the driven telescopic cylinder 2, the roller brush can also have a better mechanical structure in the extended state.

[0044] The brush groove 12 is a trapezoidal groove. The shape of the trapezoidal groove is wide at the bottom and narrow at the top. After the lower part of the brush strip 11 is inserted into the groove, it can only move horizontally, and cannot move forward, backward, or up and down. In addition to the above-mentioned inverted trapezoidal structure, the groove structure can also use a barb or other design.

[0045] See also Figure 3 and Figure 4The transmission mechanism 4 includes a front shaft 41, a one-way rotating device 42 and a rear shaft 43. One end of the front shaft 41 is connected to the fixed block 5, and the other end of the front shaft 41 is connected to the rear shaft 43 through the one-way rotating device 42. When the roller brush driving cylinder 1 rotates forward to drive the driven telescopic cylinder 2 to rotate, the rotary bearing 3 connected to the driven telescopic cylinder 2 rotates on the transmission mechanism 4 and screws out along the thread. When the rotary bearing 3 leaves the front shaft 41, it passes through the one-way rotating device 42, and a part of the rotary bearing 3 reaches the rear shaft 43. Under the action of the one-way rotating device 42, the rear shaft 43 does not rotate with the front shaft 41, and can only rotate forward. When the rotary bearing 3 reaches the rear shaft 43, the rear shaft 43 will rotate forward with the rotation of the rotary bearing 3. Since the rotary bearing 3 and the rear shaft 43 have the same rotation speed, the rotary bearing 3 can only idle at the original position and will not rotate outward. At this time, the roller brush reaches the maximum width. The setting of the one-way rotating device 42 can prevent the driven telescopic cylinder 2 from rotating excessively and causing the roller brush driving cylinder 1 and the driven telescopic cylinder 2 to separate. At the same time, when the roller brush needs to be adjusted to the maximum width, it is only necessary to rotate the roller brush driving cylinder 1, and there is no need to worry about the problem of the driven telescopic cylinder 2 separating due to excessive extension.

[0046] See also Figure 5In one embodiment, the one-way rotating device 42 is a ratchet mechanism 44 , and the length of the connecting shaft 441 of the ratchet mechanism 44 is smaller than the length of the transmission mechanism through hole of the rotary bearing 3 . When the swivel bearing 3 reaches the rear axle 43 from the front axle 41 through the ratchet mechanism 44 in the extension stage, or reaches the front axle 41 from the rear axle 43 through the ratchet mechanism 44 in the retraction stage, if the length of the transmission mechanism through hole 41 of the swivel bearing 3 is smaller than the length of the connecting shaft 441 of the ratchet mechanism 44, when the swivel bearing 3 rotates to the connection point between the front axle 41 and the connecting shaft 441, the swivel bearing 3 will leave the front axle 41 and enter the connecting shaft 441 of the ratchet mechanism 44. Since the length of the transmission mechanism through hole of the swivel bearing 3 is insufficient, after leaving the front axle 41, the thread of the rear axle 43 cannot be connected to the swivel bearing 3, and the connecting shaft 441 of the ratchet mechanism 44 has no thread, the swivel bearing 3 can only idle on the connecting shaft 441 of the ratchet mechanism 44. Because the radius of the connecting shaft 441 of the ratchet mechanism 44 is smaller than the radius of the front axle 41, the moving path of the swivel bearing 3 will be offset and stuck on the connecting shaft 441 of the ratchet mechanism 44. When the roller brush driving cylinder 1 drives the roller brush to rotate backward, the rotating bearing 3 will idle because it is stuck on the connecting shaft 441 of the ratchet mechanism 44, and cannot connect to the front shaft 41 to rotate backward. When the length of the connecting shaft 441 of the ratchet mechanism 44 is less than the length of the transmission mechanism 3 through hole of the rotating bearing 3, the rotating bearing 3 can cross the connecting shaft 441 of the ratchet mechanism 44 to achieve position switching between the front shaft 41 and the rear shaft 43. The connecting shaft 441 of the ratchet mechanism 44 can also be completely inserted into the front shaft 41 and hidden. The length of the rear shaft 43 does not need to be too long, and can be less than the length of the transmission mechanism through hole of the rotating bearing 3, but it cannot be too short, otherwise it will be understressed.

[0047] See also Figure 6 The ratchet mechanism 44 is fixed on the front shaft 41 and rotates with the front shaft 41. The ratchet mechanism 44 includes a connecting shaft 441, a ratchet 442 and a pawl 443; the connecting shaft 441 of the ratchet mechanism 44 is connected to the front shaft 41; the ratchet 442 end of the ratchet mechanism 44 is connected to the rear shaft 43. When the rear shaft 43 rotates forward with the rotating bearing 3, the pawl 443 can slide on the back of the teeth of the ratchet 442. When the rotating bearing 3 rotates backward, the pawl 443 is inserted into the tooth groove of the ratchet 442 to prevent the rear shaft 43 from rotating backward. At this time, the rotation speed of the rotating bearing 3 is greater than that of the rear shaft 43, and the rotating bearing 3 can rotate back.

[0048] It is understandable that those skilled in the art can make equivalent substitutions or changes based on the technical solution and inventive concept of the present invention, and all these changes or substitutions should fall within the protection scope of the claims attached to the present invention.

Claims

1. An automatically retractable roller brush structure, characterized in that: It includes a roller brush driving cylinder, a driven telescopic cylinder, a rotating bearing, a transmission mechanism and a fixed block; the roller brush driving cylinder is sleeved on the outside of the driven telescopic cylinder, and the driven telescopic cylinder can be telescoped along the axial direction of the roller brush driving cylinder; the outer periphery of the rotating bearing is fixedly connected to the inner wall of the driven telescopic cylinder; the transmission mechanism is used to drive the driven telescopic cylinder to move back and forth along the axial direction of the roller brush driving cylinder; the fixed block is arranged on one side of the driven telescopic cylinder and is fixedly connected to one end of the transmission mechanism; the extended end of the driven telescopic cylinder is connected to a connecting piece with a radius equal to the outer diameter of the roller brush driving cylinder, The connecting piece is connected to one end of the roller brush driving cylinder; the outer diameter of the driven telescopic cylinder is matched with the inner diameter of the roller brush driving cylinder; a plurality of brush strips and brush grooves extending along its axial direction are arranged on the outer wall of the roller brush driving cylinder, and the brush strips are clamped on the brush grooves and can slide along the brush grooves; the brush strips include movable brush strips and fixed brush strips, and the protruding ends of the brush strips are fixed on the protruding end of the driven telescopic cylinder; the transmission mechanism includes a front shaft, a one-way rotating device and a rear shaft, one end of the front shaft is connected to the rear shaft through the one-way rotating device, and the other end of the front shaft is connected to the fixed block.

2. The automatic retractable roller brush structure according to claim 1, characterized in that: The movable brush strips and the fixed brush strips are arranged at intervals.

3. The automatic retractable roller brush structure according to claim 1, characterized in that: A plurality of clamping blocks for clamping the brush strips are arranged on the outer peripheral wall of the connecting piece.

4. The automatically retractable roller brush structure according to claim 1, characterized in that: The length of the brush strip is not less than the length of the driven telescopic cylinder.

5. The automatically retractable roller brush structure according to claim 1, characterized in that: The brush groove is a trapezoidal groove.

6. The automatically retractable roller brush structure according to claim 1, characterized in that: The one-way rotating device is a ratchet mechanism.

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