Hydraulic lifting wheel

Abstract

The utility model discloses a hydraulic lifting wheel. The hydraulic lifting wheel comprises a connecting seat, a roller and a lifting device, the roller is rotationally connected to the connecting base. The lifting device is installed on the connecting base and comprises an oil storage tank, a lifting assembly and a pressing assembly. The pressing assembly is used for pumping oil in the oil storage tank to the lifting assembly so that a supporting piston rod of the lifting assembly can move downwards. The oil storage tank and the lifting assembly are connected through a pressure relief assembly. When the pressing assembly drives the supporting piston rod to move downwards, the roller moves upwards relative to the supporting piston rod to be lifted; when the oil storage tank communicates with the lifting assembly through the pressure relief assembly, the supporting piston rod moves upwards, and the rolling wheel moves downwards relative to the supporting piston rod. According to the hydraulic lifting wheel, the rollers can be separated from the ground when the hydraulic lifting wheel is static, and the supporting piston rods replace the rollers to support the whole pressing type lifting wheel, so that the contact area with the ground is increased, and the pressing type lifting wheel can be stably static on the ground.

Description

Technical Field

[0001] The utility model relates to the technical field of casters, in particular to a hydraulic lifting wheel. Background Art

[0002] Casters generally include a connection base connected to the bottom of furniture or equipment. Casters generally have a brake structure. When the furniture or equipment is moved to a certain position, the roller on the caster is usually fixed by the brake structure so that it cannot continue to roll. However, when the caster needs to be stationary on the ground for a long time, there is a risk of the brake structure loosening, and the contact area between the caster wheel and the ground is small, which can easily push the caster and cause it to slide, and the caster cannot remain stationary stably. Utility Model Content

[0003] The utility model aims to solve one of the technical problems in the related art at least to a certain extent. To this end, the utility model proposes a hydraulic lifting wheel.

[0004] The present invention provides a hydraulic lifting wheel, which comprises:

[0005] Connecting seat;

[0006] A roller, rotatably connected to the connecting seat;

[0007] A lifting device is installed on the connecting seat, and the lifting device includes an oil storage tank, a lifting assembly and a pressing assembly; the pressing assembly is used to pump the oil in the oil storage tank to the lifting assembly, so that the supporting piston rod of the lifting assembly moves downward; the oil storage tank and the lifting assembly are connected by a pressure relief assembly;

[0008] When the pressing assembly drives the supporting piston rod to move downward to the first position, the roller is higher than the lowermost end of the supporting piston rod;

[0009] The pressure relief assembly connects the oil storage tank and the lifting assembly so that when the supporting piston rod moves upward to the second position, the lowermost end of the roller is lower than the supporting piston rod.

[0010] The hydraulic lifting wheel according to the embodiment of the utility model has at least the following technical effects: when the pressing component pumps the oil in the oil storage tank into the lifting component, the supporting piston rod moves downward under the action of the oil pressure, the supporting piston rod gradually moves to the first position and then contacts the ground, the roller moves upward relative to the supporting piston rod to separate the roller from the ground, so that the hydraulic lifting wheel can be stably stationary on the ground; when the pressure relief component connects the oil storage tank with the lifting component, the oil in the lifting component enters the oil storage tank, the supporting piston rod gradually moves upward to the second position, the roller moves downward relative to the supporting piston rod to gradually contact the ground. The hydraulic lifting wheel can achieve the roller detaching from the ground when stationary, the supporting piston rod replaces the roller to support the entire pressing lifting wheel, thereby increasing the contact area with the ground and ensuring that the pressing lifting wheel can be stably stationary on the ground.

[0011] According to some embodiments of the utility model, the lifting assembly includes a first box body and the supporting piston rod, and the upper end of the supporting piston rod is inserted into the first box body and is slidably connected to the first box body.

[0012] According to some embodiments of the present utility model, the area between the upper end of the supporting piston rod and the top wall of the inner cavity of the first box body is an oil storage area, and the oil storage area is respectively connected to the oil storage tank and the pressing assembly.

[0013] According to some embodiments of the utility model, the pressure relief assembly includes an oil return pipeline and a blocking component, the oil return pipeline is respectively connected to the oil storage tank and the oil storage area, and the blocking component can block or open the oil return pipeline.

[0014] According to some embodiments of the utility model, the oil return pipeline includes a first pipeline and a second pipeline, one end of the first pipeline is connected to one end of the second pipeline, the other end of the first pipeline is connected to the oil storage tank, and the other end of the second pipeline is connected to the oil storage area, and the blocking component is arranged between the first pipeline and the second pipeline, and the blocking component is used to block the second pipeline.

[0015] According to some embodiments of the utility model, a connecting area is provided in the connecting seat, the first pipe and the second pipe are connected through the connecting area, the connecting seat is provided with a threaded hole to connect the connecting area, the blocking component includes a bolt, a spring and a blocking bead, the bolt is threadedly connected to the threaded hole, the spring and the blocking bead are both provided in the connecting area, the two ends of the spring are respectively connected to the bolt and the blocking bead, the blocking bead blocks the second pipe, and the spring applies a force toward the second pipe on the blocking bead.

[0016] According to some embodiments of the present invention, the pressing assembly includes a second box body and a pressing piston rod, and the lower end of the pressing piston rod is inserted into the second box body and slidably connected to the second box body.

[0017] According to some embodiments of the present utility model, the area between the lower end of the pressing piston rod and the bottom of the inner cavity of the second box body is a transition zone, and the transition zone is respectively connected to the lifting assembly and the oil storage tank.

[0018] According to some embodiments of the utility model, the transition zone is connected to the oil storage tank via a first oil extraction pipeline, and the first oil extraction pipeline is provided with a first one-way valve, which can prevent liquid from flowing back from the transition zone to the oil storage tank through the first oil extraction pipeline.

[0019] According to some embodiments of the utility model, the transition zone is connected to the lifting assembly by a second oil extraction pipeline, and the second oil extraction pipeline is provided with a second one-way valve, which can prevent liquid from flowing back from the lifting assembly to the transition zone through the second oil extraction pipeline.

[0020] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0022] Figure 1 It is a schematic diagram of the structure of the hydraulic lifting wheel of some embodiments of the utility model;

[0023] Figure 2 It is a schematic diagram of the structure of the hydraulic lifting wheel at a zero-one angle of some embodiments of the utility model;

[0024] Figure 3 It is a schematic diagram of the interior of the lifting device of some embodiments of the utility model;

[0025] Figure 4 It is a schematic diagram of the interior of the pressure relief assembly of some embodiments of the utility model.

[0026] Figure Number:

[0027] Connecting seat 100, connecting area 101, threaded hole 110, roller 120, lifting device 130, oil storage tank 140;

[0028] Lifting assembly 200, first box body 210, supporting piston rod 220, oil storage area 230;

[0029] A pressing assembly 300, a second box body 310, a pressing piston rod 320, and a transition zone 330;

[0030] Pressure relief assembly 400, oil return pipeline 410, first pipeline 411, second pipeline 412, plugging component 420, bolt 421, spring 422, plugging bead 423;

[0031] A first oil extraction pipeline 510 , a first one-way valve 511 , a second oil extraction pipeline 520 , and a second one-way valve 521 . DETAILED DESCRIPTION

[0032] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0033] In the description of the present invention, it should be understood that the descriptions involving orientation, such as the orientation or positional relationship indicated as up, down, etc., are based on the orientation or positional relationship 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 orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0034] In the description of the utility model, if there is a description of first and second, it is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0035] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0036] The following is a further description of the embodiments of the present invention in conjunction with the accompanying drawings.

[0037] According to some embodiments of the present invention, referring to Figures 1 to 3The hydraulic lifting wheel includes a connecting seat 100, a roller 120 and a lifting device 130. The roller 120 is rotatably connected to the connecting seat 100. The lifting device 130 is installed on the connecting seat 100, and the lifting device 130 includes an oil storage tank 140, a lifting component 200 and a pressing component 300. The pressing component 300 can pump the oil in the oil storage tank 140 to the lifting component 200, so that the supporting piston rod 220 of the lifting component 200 gradually moves downward under the action of the oil pressure. The oil storage tank 140 and the lifting component 200 are connected by a pressure relief component 400, and the pressure relief component 400 can make the oil storage tank 140 and the lifting component 200 communicate with each other or be closed. When the pressing assembly 300 drives the supporting piston rod 220 to move downward to the first position, the roller 120 is higher than the lowest end of the supporting piston rod 220. During this process, the pressing assembly 300 drives the supporting piston rod 220 to gradually move downward, and the roller 120 gradually moves upward relative to the supporting piston rod 220 to be lifted. When the pressure relief assembly 400 connects the oil storage tank 140 and the lifting assembly 200, the oil in the lifting assembly 200 flows into the oil storage tank 140 through the pressure relief assembly 400, and the supporting piston rod 220 moves upward to the second position. The lowest end of the roller 120 is lower than the supporting piston rod 220. During this process, the supporting piston rod 220 gradually moves upward, and the roller 120 gradually moves downward relative to the supporting piston rod 220.

[0038] It is understandable that, referring to Figures 1 to 3 When the pressing assembly 300 pumps the oil in the oil tank 140 into the lifting assembly 200, the supporting piston rod 220 moves downward under the action of the oil pressure, the supporting piston rod 220 gradually contacts the ground, and the roller 120 moves upward relative to the supporting piston rod 220 to separate the roller 120 from the ground, so that the hydraulic lifting wheel can be stably stationary on the ground; when the pressure relief assembly 400 connects the oil tank 140 with the lifting assembly 200, the oil in the lifting assembly 200 enters the oil tank 140, the supporting piston rod 220 gradually moves upward, and the roller 120 moves downward relative to the supporting piston rod 220 to gradually contact the ground. The hydraulic lifting wheel can achieve that the roller 120 is separated from the ground when stationary, and the supporting piston rod 220 replaces the roller 120 to support the entire pressing lifting wheel, thereby increasing the contact area with the ground and ensuring that the pressing lifting wheel can be stably stationary on the ground.

[0039] Preferably, refer to Figure 3 The lifting assembly 200 includes a first box body 210 and a supporting piston rod 220, the upper end of the supporting piston rod 220 is inserted into the first box body 210 and is slidably connected to the first box body 210. The area between the upper end of the supporting piston rod 220 and the top wall of the inner cavity of the first box body 210 is an oil storage area 230, and the oil storage area 230 is connected to the oil storage tank 140 and the pressing assembly 300 respectively.

[0040] Reference Figure 3 and Figure 4 The pressure relief assembly 400 includes an oil return pipe 410 and a plugging component 420. The oil return pipe 410 is connected to the oil storage tank 140 and the oil storage area 230 respectively. The plugging component 420 can plug or open the oil return pipe 410. The oil return pipe 410 includes a first pipe 411 and a second pipe 412. One end of the first pipe 411 is connected to one end of the second pipe 412. The other end of the first pipe 411 is connected to the oil storage tank 140. The other end of the second pipe 412 is connected to the oil storage area 230. The plugging component 420 is arranged between the first pipe 411 and the second pipe 412. A connecting area 101 is provided in the connecting seat 100, and the first pipe 411 and the second pipe 412 are connected through the connecting area 101. The connecting seat 100 is provided with a threaded hole 110 to connect the connecting area 101. The sealing component 420 includes a bolt 421, a spring 422 and a blocking bead 423. The bolt 421 is threadedly connected to the threaded hole 110. The spring 422 and the blocking bead 423 are both provided in the connecting area 101. The two ends of the spring 422 are respectively connected to the bolt 421 and the blocking bead 423. The blocking bead 423 blocks the second pipe 412, and the spring 422 applies a force toward the second pipe 412 to the blocking bead 423.

[0041] It is understandable that, referring to Figure 4 When pressure relief is required, by rotating bolt 421 to move bolt 421 away from second pipe 412, the force of spring 422 on blocking bead 423 is reduced, and the oil pressure in second pipe 412 is the same as the oil pressure in oil storage area 230. The oil pressure in second pipe 412 can push open blocking bead 423, so that the oil in second pipe 412 enters connection area 101 and enters oil storage tank 140 through first pipe 411, thereby reducing the oil pressure in oil storage area 230 and supporting piston rod 220 to gradually move upward under the action of air pressure. When pressure relief is not required, by rotating bolt 421 to move bolt 421 close to second pipe 412, spring 422 increases the force on blocking bead 423, so that blocking bead 423 closes second pipe 412 and prevents oil in second pipe 412 from entering connection area 101.

[0042] Preferably, refer to Figure 3The pressing assembly 300 includes a second box body 310 and a pressing piston rod 320, the lower end of the pressing piston rod 320 is inserted into the second box body 310 and is slidably connected to the second box body 310. The area between the lower end of the pressing piston rod 320 and the bottom of the inner cavity of the second box body 310 is a transition zone 330, and the transition zone 330 is respectively connected to the lifting assembly 200 and the oil storage tank 140. The transition zone 330 is connected to the oil storage tank 140 through a first oil extraction pipeline 510, and the first oil extraction pipeline 510 is provided with a first one-way valve 511, which can prevent the liquid from flowing back from the transition zone 330 through the first oil extraction pipeline 510 to the oil storage tank 140. The transition zone 330 is connected to the lifting assembly 200 via a second oil extraction pipeline 520 , and the second oil extraction pipeline 520 is provided with a second one-way valve 521 , which can prevent the liquid from flowing back from the lifting assembly 200 to the transition zone 330 through the second oil extraction pipeline 520 .

[0043] It is understandable that, referring to Figure 3 When the piston rod 320 is pressed to move upward, negative pressure is formed in the transition zone 330, so that the oil in the oil storage tank 140 enters the transition zone 330 through the first oil extraction pipeline 510, and the second one-way valve 521 in the second oil extraction pipeline 520 can prevent the oil in the oil storage area 230 from entering the transition zone 330 through the second oil extraction pipeline 520. When the piston rod 320 is pressed to move downward, the piston rod 320 presses the oil in the transition zone 330 into the oil storage area 230 through the second oil extraction pipeline 520, and the first one-way valve 511 in the first oil extraction pipeline 510 can prevent the oil in the transition zone 330 from returning to the water storage tank through the first oil extraction pipeline 510.

[0044] In the description of this specification, the description with reference to the term "some embodiments" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0045] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A hydraulic lifting wheel, characterized in that: include: Connecting seat (100); A roller (120) rotatably connected to the connecting seat (100); A lifting device (130) is installed on the connecting seat (100), and the lifting device (130) comprises an oil storage tank (140), a lifting assembly (200) and a pressing assembly (300); the pressing assembly (300) is used to pump the oil in the oil storage tank (140) to the lifting assembly (200), so that the supporting piston rod (220) of the lifting assembly (200) moves downward; the oil storage tank (140) and the lifting assembly (200) are connected via a pressure relief assembly (400); When the pressing assembly (300) drives the supporting piston rod (220) to move downward to a first position, the roller (120) is higher than the lowermost end of the supporting piston rod (220); The pressure relief assembly (400) connects the oil storage tank (140) and the lifting assembly (200) so that when the supporting piston rod (220) moves upward to the second position, the lowermost end of the roller (120) is lower than the supporting piston rod (220).

2. The hydraulic lifting wheel according to claim 1, characterized in that: The lifting assembly (200) comprises a first box body (210) and a supporting piston rod (220), wherein the upper end of the supporting piston rod (220) is inserted into the first box body (210) and is slidably connected to the first box body (210).

3. The hydraulic lifting wheel according to claim 2, characterized in that: The area between the upper end of the supporting piston rod (220) and the top wall of the inner cavity of the first box body (210) is an oil storage area (230), and the oil storage area (230) is respectively connected to the oil storage tank (140) and the pressing assembly (300).

4. The hydraulic lifting wheel according to claim 3, characterized in that: The pressure relief assembly (400) comprises an oil return pipeline (410) and a blocking component (420), wherein the oil return pipeline (410) is connected to the oil storage tank (140) and the oil storage area (230) respectively, and the blocking component (420) can block or open the oil return pipeline (410).

5. The hydraulic lifting wheel according to claim 4, characterized in that: The oil return pipeline (410) comprises a first pipeline (411) and a second pipeline (412); one end of the first pipeline (411) is in communication with one end of the second pipeline (412); the other end of the first pipeline (411) is in communication with the oil storage tank (140); the other end of the second pipeline (412) is in communication with the oil storage area (230); the blocking component (420) is disposed between the first pipeline (411) and the second pipeline (412); the blocking component (420) is used to block the second pipeline (412).

6. The hydraulic lifting wheel according to claim 5, characterized in that: The connecting seat (100) is provided with a connecting area (101), the first pipe (411) and the second pipe (412) are connected through the connecting area (101), the connecting seat (100) is provided with a threaded hole (110) to connect the connecting area (101), the blocking component (420) comprises a bolt (421), a spring (422) and a blocking bead (423), the bolt (421) is threadedly connected to the threaded hole (110), the spring (422) and the blocking bead (423) are both provided in the connecting area (101), the two ends of the spring (422) are respectively connected to the bolt (421) and the blocking bead (423), the blocking bead (423) blocks the second pipe (412), and the spring (422) applies a force toward the second pipe (412) to the blocking bead (423).

7. The hydraulic lifting wheel according to claim 1, characterized in that: The pressing assembly (300) comprises a second box body (310) and a pressing piston rod (320), wherein the lower end of the pressing piston rod (320) is inserted into the second box body (310) and is slidably connected to the second box body (310).

8. The hydraulic lifting wheel according to claim 7, characterized in that: The area between the lower end of the pressing piston rod (320) and the bottom of the inner cavity of the second box body (310) is a transition zone (330), and the transition zone (330) is respectively connected to the lifting assembly (200) and the oil storage tank (140).

9. The hydraulic lifting wheel according to claim 8, characterized in that: The transition zone (330) and the oil storage tank (140) are connected via a first oil extraction pipeline (510). The first oil extraction pipeline (510) is provided with a first one-way valve (511). The first one-way valve (511) can prevent liquid from flowing back from the transition zone (330) to the oil storage tank (140) through the first oil extraction pipeline (510).

10. The hydraulic lifting wheel according to claim 8, characterized in that: The transition zone (330) is connected to the lifting assembly (200) via a second oil extraction pipeline (520), and the second oil extraction pipeline (520) is provided with a second one-way valve (521). The second one-way valve (521) can prevent liquid from flowing back from the lifting assembly (200) to the transition zone (330) through the second oil extraction pipeline (520).

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