Reducing mechanism of pipe coiling device

Abstract

The utility model relates to the technical field of reducing mechanisms, and discloses a reducing mechanism of a pipe winder, which comprises a mandrel and a wheel disc, an assembly cavity is arranged on one side of the wheel disc, a baffle is mounted in the assembly cavity, a reduction gear is arranged on the mandrel, and a first duplicate gear is arranged on the bottom wall of the assembly cavity. A first duplicate gear is arranged on one side face of the baffle and comprises a first small gear and a first large gear which are coaxially arranged, the first small gear is meshed with the reduction gear, a second duplicate gear is arranged on one side face of the baffle and comprises a second small gear and a second large gear which are coaxially arranged, and the second small gear is meshed with the first large gear. A speed reduction disc is arranged on the other side face of the baffle, and a driving gear is arranged on the speed reduction disc. Through the structure, the speed reduction mechanism of the pipe coiling device can perform three-stage speed reduction on the wheel disc, so that the wheel disc in an existing automatic pipe coiling device achieves a better speed reduction effect, and unnecessary personal injury caused by swinging of a water pipe due to too fast retraction of the wheel disc is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of speed reduction mechanisms, in particular to a speed reduction mechanism for a hose reel. Background Art

[0002] Currently, when watering seedlings in landscape gardens, water pipes are used to connect to distant water sources. Therefore, most water pipes are wound and stored using automatic hose reels to reduce clutter. Commonly used automatic hose reels mainly consist of a core shaft, a disc that rotates on the core shaft, and a coil spring interposed between the core shaft and the disc. The water pipe is wound around the disc. When the pipe is pulled out, the pulled water pipe drives the disc to rotate around the core shaft, which in turn drives the coil spring to continuously compress and accumulate potential energy. When the pulled water pipe needs to be wound and stored, the compressed coil spring releases potential energy, driving the disc to rotate, allowing the water pipe to be rewound around the disc.

[0003] However, due to the large compression potential energy of the coil spring, if the user does not pull the water pipe in advance to help it wind around the wheel, but allows the potential energy of the coil spring to automatically wind the pipe, the wheel rotation speed will be too fast due to the unrestricted rotation speed of the wheel. This can easily cause the water pipe to swing in a curved shape during the retraction process, thereby causing unnecessary personal injury and damage to the joints of the water pipe. Utility Model Content

[0004] The purpose of the present invention is to provide a deceleration mechanism for a hose reel to solve the problems raised in the above background technology.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] A reduction mechanism for a hose reel comprises a core shaft and a wheel disc rotatably arranged on the core shaft, one side of the wheel disc is concave to form an assembly cavity for one end of the core shaft to extend into, a baffle is installed in the assembly cavity, and a reduction gear is fixedly installed at the end of the core shaft that passes through the baffle and extends into the assembly cavity, a rotatable first duplex gear is provided on the bottom wall of the assembly cavity, the first duplex gear comprises a first small gear and a first large gear that are coaxially arranged, the first small gear is meshed with the reduction gear, a rotatable second duplex gear is provided on one side surface of the baffle, the second duplex gear comprises a second small gear and a second large gear that are coaxially arranged, the second small gear is meshed with the first large gear, a reduction disc is provided on the other side surface of the baffle, a drive gear that is sleeved outside the core shaft and passes through the baffle is provided at the center position of the reduction disc, and the drive gear is meshed with the second large gear.

[0007] Furthermore, a disc cover covering the outside of the speed reduction disc is provided at the opening of the assembly cavity. The speed reduction disc includes a connecting disc portion connected to the driving gear, and a friction disc portion relatively arranged outside the connecting disc portion. The friction disc portions are connected to the connecting disc portions through connecting portions. The rotation of the speed reduction disc is used to make the friction disc portions move away from each other and squeeze the inner side wall of the disc cover to achieve speed reduction of the speed reduction disc.

[0008] Furthermore, mounting posts are evenly distributed on the bottom wall of the assembly cavity, and the baffle is mounted on the mounting posts by countersunk screws.

[0009] Furthermore, one end portion of the disc cover extends outward to form an overlapping portion overlapping the opening of the assembly cavity, and the overlapping portion is installed at the opening of the assembly cavity by a countersunk screw.

[0010] Furthermore, an edge of one side of the wheel disc is bent along its circumference to form a bent portion, a mounting cavity is formed between the bent portion and one side of the wheel disc, and a cover plate is provided at the opening of the mounting cavity via a countersunk screw.

[0011] Furthermore, a plug-in plate is provided at the end of the core shaft extending into the assembly cavity, and a plug-in hole for the plug-in plate to be inserted is provided on the reduction gear.

[0012] Furthermore, a pre-tightening cover is provided at the outer end of the core shaft via a countersunk screw.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] 1. The utility model, through the arrangement of the first double gear, the second double gear and the reduction plate, enables the reduction mechanism of the hose reel to perform three-stage reduction on the wheel, thereby achieving a better reduction effect on the wheel in the existing automatic hose reel, avoiding unnecessary personal injury caused by the swinging of the water hose due to excessive retraction of the wheel.

[0015] 2. In the present invention, the first duplex gear and the second duplex gear are installed by self-tapping screws with flat washers. By inserting the plug-in plate into the corresponding plug-in hole, the reduction gear can be quickly installed on the inner end of the core shaft, making the assembly of the reduction mechanism of the hose reel simpler and the structure more compact. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the speed reduction mechanism of the hose reel in the present utility model.

[0017] Figure 2 This is a schematic diagram of the explosion structure of the wheel disc at the cover plate in the utility model.

[0018] Figure 3 It is a structural schematic diagram of the roulette wheel in this utility model.

[0019] Figure 4This is a schematic diagram of the half-section structure of the wheel in the present utility model.

[0020] Figure 5 This is a schematic diagram of the matching structure of the first duplex gear and the second duplex gear on the baffle in the present utility model.

[0021] Figure 6 It is a structural schematic diagram of the speed reduction disc in the utility model.

[0022] The meanings of the numbers in the figure are: 100, wheel disc; 101, bending part; 110, cover plate; 120, pre-tightening cover; 200, core shaft; 210, disc cover; 221, mounting cavity; 301, assembly cavity; 302, mounting column; 400, baffle; 410, reduction gear; 420, driving gear; 431, overlapping part; 440, reduction disc; 511, first small gear; 512, first large gear; 521, second small gear; 522, second large gear; 531, plug-in plate; 611, connecting disc part; 612, friction disc part; 613, connecting part. DETAILED DESCRIPTION

[0023] In order to further understand the content of the present invention, the present invention is described in detail with reference to the accompanying drawings and embodiments. It should be understood that the embodiments are merely for explanation of the present invention and are not intended to limit the present invention.

[0024] The following is combined with Figures 1-6 This embodiment is described in further detail.

[0025] A deceleration mechanism of a hose reel in this embodiment is used to decelerate the rotation of the wheel 100 in an existing automatic hose reel when retracting the water hose, so as to prevent the water hose from swinging in a curved shape during the retraction process, thereby causing harm to the user.

[0026] like Figure 1-6As shown, the reduction mechanism of the hose reel in this embodiment includes a core shaft 200 and a wheel disc 100 rotatably mounted on the core shaft 200. One side of the wheel disc 100 is concave to form an assembly cavity 301 for inserting one end of the core shaft 200. A baffle 400 is installed in the assembly cavity 301. The core shaft 200 passes through the baffle 400 and extends into the assembly cavity 301. A reduction gear 410 is fixedly installed at the end thereof. A rotatable first duplex gear is provided on the bottom wall of the assembly cavity 301. The first duplex gear includes a first small gear 511 and a first large gear coaxially arranged. 512, the first small gear 511 is meshed with the reduction gear 410, and a rotatable second double gear is provided on one side surface of the baffle 400. The second double gear includes a second small gear 521 and a second large gear 522 arranged coaxially. The second small gear 521 is meshed with the first large gear 512, and a reduction plate 440 is provided on the other side surface of the baffle 400. A driving gear 420 is provided at the center position of the reduction plate 440, which is sleeved on the outside of the core shaft 200 and passes through the baffle 400. The driving gear 420 is meshed with the second large gear 522.

[0027] In actual use of this embodiment, the assembly cavity 301 is formed at the axis center of the wheel disc 100, with its opening facing one side of the wheel disc 100. The inner end of the core shaft 200 extends into the assembly cavity 301, and the outer end of the core shaft 200 is mounted with a pre-tightening cover 120 via a countersunk screw. By fixing the pre-tightening cover 120 to the housing of the existing automatic hose reel, the core shaft 200 is fixedly installed.

[0028] In this embodiment, combined with Figure 3 and Figure 4 As shown, mounting posts 302 are evenly distributed on the bottom wall of the assembly cavity 301 along the circumference of the wheel disc 100. The baffle 400 is mounted on the mounting posts 302 by countersunk screws, thereby achieving fixed installation of the baffle 400 in the assembly cavity 301. The inner end of the core shaft 200 passes through the baffle 400 and extends into the assembly cavity 301 to achieve rotation of the wheel disc 100 on the core shaft 200.

[0029] In actual use, the first double gear is rotatably mounted on the bottom wall of the assembly cavity 301 by a self-tapping screw with a flat washer, so that the first small gear 511 is meshed with the reduction gear 410, wherein the diameter of the first small gear 511 is smaller than the diameter of the first large gear 512, and the second double gear is rotatably mounted on the side of the baffle 400 by a self-tapping screw with a flat washer, so that the second small gear 521 is meshed with the first large gear 512, and the second large gear 522 is meshed with the driving gear 420 at the same time; with the above structure, under the action of the coil spring, when the wheel 100 rotates to retract the water pipe, the rotation of the wheel 100 can make the first small gear 511 rotate around the reduction gear 410. The speed gear 410 rotates, thereby driving the first large gear 512 to rotate, so that the first duplex gear can perform a first-stage deceleration on the wheel disc 100; at the same time, the rotation of the first large gear 512 will drive the second small gear 521 to rotate, and then drive the second large gear 522 to rotate, so that the second duplex gear can perform a second-stage deceleration on the wheel disc 100; at the same time, the rotation of the second large gear 522 can drive the driving gear 420 to rotate, and then drive the deceleration plate 440 to rotate, so that the deceleration plate 440 can perform a third-stage deceleration on the wheel disc 100. Therefore, the deceleration mechanism of the hose reel in this embodiment can perform a third-stage deceleration on the wheel disc 100, thereby achieving a better deceleration effect.

[0030] Specifically, the edge of one side of the wheel disc 100 is bent along its circumference to form a bent portion 101, and a mounting cavity 221 is formed between the bent portion 101 and one side of the wheel disc 100. A cover plate 110 is provided at the opening of the mounting cavity 221 via a countersunk screw.

[0031] In this embodiment, the installation cavity 221 is used for installing a coil spring, wherein the coil spring is sleeved on the outside of the core shaft 200, one end of which is fixedly connected to the core shaft 200, and the other end is fixedly connected to the wheel disc 100, and the cover plate 110 is detachably installed at the opening of the installation cavity 221, for realizing the encapsulation of the coil spring in the wheel disc 100; thereby, the rotation of the wheel disc 100 out of the tube can compress the coil spring and accumulate potential energy, and the release of the potential energy of the coil spring can drive the wheel disc 100 to rotate and automatically reel the tube.

[0032] Specifically, a plug-in plate 531 is provided at the end of the core shaft 200 extending into the assembly cavity 301, and a plug-in hole for the plug-in plate 531 to be inserted is provided on the reduction gear 410. By inserting the plug-in plate 531 into the corresponding plug-in hole, the reduction gear 410 can be quickly installed at the inner end of the core shaft 200, thereby making the assembly of the reduction mechanism of the hose reel simpler and the structure more compact.

[0033] Combine Figure 5 and Figure 6As shown, in this embodiment, a disk cover 210 covering the outside of the speed reduction disk 440 is provided at the opening of the assembly cavity 301. The speed reduction disk 440 includes a connecting disk portion 611 connected to the driving gear 420, and a friction disk portion 612 relatively arranged outside the connecting disk portion 611. The friction disk portions 612 are connected to the connecting disk portion 611 through a connecting portion 613. The rotation of the speed reduction disk 440 is used to make the friction disk portions 612 move away from each other and squeeze the inner wall of the disk cover 210 to achieve deceleration of the speed reduction disk 440.

[0034] In this embodiment, the disk cover 210 is a circular end cover. When it is installed at the opening of the assembly cavity 301, the open end of the disk cover 210 can abut against the side of the baffle 400, so that a cavity for the speed reduction disk 440 to be installed is formed therebetween.

[0035] The end of the disk cover 210 away from the opening extends outward to form an overlapping portion 431 that overlaps the opening of the assembly cavity 301. The overlapping portion 431 is mounted on the opening of the assembly cavity 301 by a countersunk screw, thereby better achieving the installation of the disk cover 210 in the assembly cavity 301.

[0036] In this embodiment, Figure 6 As shown, a centrifugal force arm is formed between the corresponding friction disc portion 612 and the connecting portion 613. The connecting portion 613 of the two centrifugal force arms is on the same diameter line of the reduction plate 440. The friction disc portions 612 of the two centrifugal force arms are formed into a circle with the reduction plate 440 as the center and are connected to the outermost end of the corresponding connecting portion 613. The outer diameter of the circle is smaller than the inner diameter of the cavity. Therefore, in actual use, the driving gear 420 drives the reduction plate 440 to rotate forward and backward, which can cause the two friction disc portions 612 to embrace and separate from the inner wall of the disc cover 210 or to unfold and contact the inner wall of the disc cover 210. When the wheel disc 100 retracts, the friction between the friction disc portion 612 and the inner wall of the disc cover 210 is used to block the rotation of the wheel disc 100, thereby slowing down the wheel disc 100.

[0037] Specifically, when the wheel 100 is completely retracted by the winding spring, the faster the wheel 100 rotates, the greater the centrifugal force of the corresponding friction disc portion 612, and the greater the friction between the friction disc portion 612 and the inner wall of the disc cover 210, thereby achieving the purpose of automatically reducing the rotation speed of the wheel 100; when the rotation speed of the wheel 100 is reduced to a certain extent, the centrifugal force of the friction disc portion 612 is reduced, and the friction between the friction disc portion 612 and the inner wall of the disc cover 210 becomes loose, which automatically accelerates the rotation of the wheel 100. Therefore, the deceleration mechanism of the hose reel in this embodiment can make the retraction speed of the wheel 100 always maintained within a reasonable, safe and uniform speed range.

Claims

1. A speed reducing mechanism for a hose reel, comprising a core shaft (200) and a wheel (100) rotatably mounted on the core shaft (200), characterized in that: One side of the wheel disc (100) is concave to form an assembly cavity (301) for one end of the core shaft (200) to extend into. A baffle (400) is installed in the assembly cavity (301). The core shaft (200) passes through the baffle (400) and extends into the assembly cavity (301). A reduction gear (410) is fixedly installed at the end thereof. A rotatable first duplex gear is provided on the bottom wall of the assembly cavity (301). The first duplex gear includes a first small gear (511) and a first large gear (512) arranged coaxially. The first small gear (511) is connected to the reduction gear (410). A second rotatable double gear is provided on one side of the baffle (400), and the second double gear includes a second small gear (521) and a second large gear (522) arranged coaxially, and the second small gear (521) is meshed with the first large gear (512). A reduction plate (440) is provided on the other side of the baffle (400), and a driving gear (420) is provided at the center of the reduction plate (440) and is sleeved outside the core shaft (200) and penetrates the baffle (400). The driving gear (420) is meshed with the second large gear (522).

2. The speed reduction mechanism of a hose reel according to claim 1, characterized in that: A disc cover (210) is provided at the opening of the assembly cavity (301) to cover the outside of the speed reduction disc (440). The speed reduction disc (440) includes a connecting disc portion (611) connected to the driving gear (420), and a friction disc portion (612) relatively provided outside the connecting disc portion (611). The friction disc portion (612) is connected to the connecting disc portion (611) via a connecting portion (613). The speed reduction disc (440) rotates to move the friction disc portions (612) away from the inner side wall of the extrusion disc cover (210) to achieve speed reduction of the speed reduction disc (440).

3. The speed reduction mechanism of a hose reel according to claim 1, characterized in that: Mounting columns (302) are evenly distributed on the bottom wall of the assembly cavity (301), and the baffle (400) is mounted on the mounting columns (302) by means of countersunk screws.

4. The speed reduction mechanism of a hose reel according to claim 2, characterized in that: One end of the disc cover (210) extends outward to form an overlapping portion (431) overlapping the opening of the assembly cavity (301), and the overlapping portion (431) is mounted on the opening of the assembly cavity (301) by means of a countersunk screw.

5. The speed reduction mechanism of a hose reel according to claim 1, characterized in that: An edge of one side of the wheel disc (100) is bent along its circumferential direction to form a bent portion (101), and a mounting cavity (221) is formed between the bent portion (101) and one side of the wheel disc (100). A cover plate (110) is provided at the opening of the mounting cavity (221) via a countersunk screw.

6. The speed reduction mechanism of a hose reel according to claim 1, characterized in that: A plug-in plate (531) is provided at the end of the core shaft (200) extending into the assembly cavity (301), and a plug-in hole for the plug-in plate (531) to be inserted is provided on the reduction gear (410).

7. The speed reduction mechanism of a hose reel according to claim 1, characterized in that: The outer end of the core shaft (200) is provided with a pre-tightening cover (120) via a countersunk screw.

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