A three-stage coupled lifting device for a Christmas tree equipped with an internally installed chain

Abstract

A three-stage, coupled lifting device for a Christmas tree, equipped with an internally installed chain, comprising a base and a support fixed to the base, characterized in that the support comprises an outer tube, a central tube, an inner tube, an upper fastening sleeve of the outer tube, an upper fastening sleeve of the central tube, a lower fastening sleeve of the inner tube, an electric lifting assembly, and a sliding lifting cable, wherein the outer tube, the central tube, and the inner tube are each hollow tubes, the outer tube is fixed to the base by its lower end, the upper sleeve of the outer tube is attached to the upper end of the outer tube, the central tube is passed through the upper sleeve of the outer tube and fits slidably and tightly in the central hollow chamber of the outer tube, and the upper sleeve of the central tube is fixed to the upper end of the central tube.The inner tube is passed through the upper sleeve of the middle tube and fits slidably within the central hollow chamber of the middle tube, and the lower sleeve of the inner tube is attached to the lower end of the inner tube and slides against the inner wall of the hollow chamber of the middle tube. The drive unit of the electric lifting component is attached to the inside of the lower end of the outer tube. The lifting path part of the electric lifting component protrudes into the inner tube. The lower end of the middle tube is firmly connected to the lifting path part. The electric lifting component is electrically connected to an external control and power supply system. One end of the sliding lifting rope is attached to the underside of the electric lifting component, and the other end is passed through the top of the electric lifting component, supported there, returned, and attached to the inner wall in the lower area of ​​the inner tube.

Description

Field of invention

[0001] The present utility model relates to the technical field of Christmas tree devices, in particular a three-stage coupled lifting device for a Christmas tree equipped with a chain installed inside. State of the art

[0002] Christmas is a traditional Western holiday celebrated worldwide. The Christmas tree is an essential part of the festive decorations, primarily serving to create a celebratory atmosphere during the Christmas season. It is a commonly used decorative object in both homes and businesses. With rapid social and economic development, more and more families and shops are purchasing Christmas trees to decorate their sales areas. This necessitates certain requirements regarding the height of the Christmas tree. At the same time, transporting them can be difficult due to their size and height, making a lifting mechanism necessary.

[0003] The problem of Christmas tree height needs to be solved. Adjustable Christmas trees with a lifting function already exist, such as the "novel automatic lifting stand for Christmas trees" described in patent application CN217285387U. However, this stand only has a single telescopic section, and the remaining height and volume after retraction are still relatively large, making transport difficult. Therefore, there is a need to further improve the lifting stand for Christmas trees to reduce its height and volume even more. Object of the invention

[0004] For this reason, the present utility model provides a three-stage coupled lifting device for a Christmas tree, equipped with an internally installed chain, which solves the problems of the prior art by constructing a two-stage electric lifting system.

[0005] The technical objective of the present utility model is achieved by the following technical solution: The three-stage, coupled lifting device for a Christmas tree, equipped with an internally installed chain, comprises a base and a support mounted on the base, the support including an outer tube, a middle tube, an inner tube, an upper mounting sleeve of the outer tube, an upper mounting sleeve of the middle tube, a lower mounting sleeve of the inner tube, an electrical lifting assembly, and a sliding lifting rope. The outer tube, the middle tube, and the inner tube are each hollow; the outer tube is attached to the base at its lower end; the upper mounting sleeve of the outer tube is fixed to its upper end; the middle tube passes through the upper mounting sleeve of the outer tube and is slidably mounted tightly within the central hollow chamber of the outer tube.The upper mounting sleeve of the central tube is attached to the upper end of the central tube. The inner tube is guided through the upper mounting sleeve and slidably mounted tightly within the central hollow chamber of the central tube. The lower mounting sleeve of the inner tube is attached to the lower end of the inner tube and slidably guided against the inner wall of the central tube.

[0006] The drive unit of the electric lifting assembly is attached to the inside of the lower end of the outer tube, while the lifting unit projects into the inner tube. The lower end of the central tube is rigidly connected to the lifting unit of the electric lifting assembly. The electric lifting assembly is electrically connected to an external control power supply system. One end of the sliding lifting cable is attached to the lower part of the electric lifting assembly, and the other end is routed over the top of the electric lifting assembly, supported there, bent back, and attached to the inner wall of the middle to lower section of the inner tube.

[0007] Furthermore, the electric lifting assembly is a spindle-based linear drive device.

[0008] Furthermore, the spindle-based linear actuator comprises a motor, a motor mounting plate, a coupling, a threaded rod retaining ring, a bearing, a threaded rod mounting plate, a threaded rod, a threaded rod lifting plate, a fixed tube, an upper fixed plate, a lifting tube, and a lifting plate. The outer surface of the motor mounting plate is attached to the inner surface of the lower end of the outer tube. The motor is mounted centrally on the motor mounting plate, and the lower end of the threaded rod is positively connected to the motor's drive shaft via a coupling.

[0009] The outer side of the threaded rod's mounting plate is attached to the inner side of the lower end of the outer tube. The upper fixing plate is connected to the threaded rod's mounting plate via the fixed tube. A bearing or a retaining ring is located on the outside of the threaded rod's upper and lower ends. The lower end of the threaded rod is rotatably mounted centrally on the threaded rod's mounting plate, and the upper end is rotatably mounted on the upper fixing plate.

[0010] The lifting plate of the threaded rod is equipped with an internal thread that corresponds to the external thread of the threaded rod. The threaded rod runs through the lifting plate and is screwed to it. The upper part of the lifting plate is firmly connected to the lower end of the center tube.

[0011] The lower end of the lifting tube is fixed to the threaded rod's mounting plate, while the upper end passes through the upper mounting plate and is connected to the lifting plate. One end of the sliding lifting cable is fixed to the threaded rod's mounting plate, and the other end passes through the lifting tube, the upper mounting plate, and the lifting plate, before being bent back and attached to the inner wall of the middle to lower section of the inner tube.

[0012] Furthermore, the spindle-based linear actuator includes an upper and a lower limit switch. The upper limit switch is mounted on the underside of the side surface of the upper mounting plate. The lower limit switch is mounted on the top of the side surface of the threaded rod's mounting plate and is located directly opposite the underside of the threaded rod's lifting plate. The upper limit switch is connected in series with the lower limit switch via a cable that runs through the inner cavity of the inner tube. The motor is electrically connected to an external control power supply system after being connected in series with the upper and lower limit switches.

[0013] Furthermore, the sliding lifting rope is a nylon cord, a wire rope or a chain.

[0014] Advantages of the present utility model: The present utility model provides for an electrically operated, two-stage lifting stand for Christmas trees, with the tree components arranged around the outside of the stand. The spindle-based linear drive of the electric lifting assembly allows the Christmas tree stand to be easily raised and lowered. Simultaneously, the sliding lifting cable is attached to the electric lifting assembly. When the central tube is raised, the lifting cable is carried along and simultaneously raises the inner tube, creating a two-stage lifting effect. This design enables a faster lifting process and, when retracted, reduces both the height and volume of the stand, thus facilitating transport and setup. Brief description of the drawings Fig. Figure 1 is a schematic representation of the three-stage, coupled lifting device for a Christmas tree, equipped with an internally installed chain, according to the present utility model; Fig. Figure 2 is an exploded view of the three-stage, coupled lifting device for a Christmas tree, equipped with an internally installed chain, according to the present utility model.

[0015] The reference numerals in the drawings mean the following: 1 is the base, 2 is the outer tube, 3 is the middle tube, 4 is the inner tube, 5 is the upper mounting sleeve of the outer tube, 6 is the upper mounting sleeve of the middle tube, 7 is the lower mounting sleeve of the inner tube, 8 is the electrical lifting assembly, 9 is the sliding lifting cable, 801 is the motor, 802 is the motor mounting plate, 803 is the coupling, 804 is the threaded rod retaining ring, 805 is the bearing, 806 is the threaded rod mounting plate, 807 is the threaded rod, 808 is the threaded rod lifting plate, 809 is the fixing tube, 810 is the upper mounting plate, 811 is the lifting tube, 812 is the lifting plate, 813 is the upper limit switch, 814 is the lower limit switch. Description of preferred embodiments

[0016] The present disclosure will be described in detail below with reference to the drawings.

[0017] The following specific embodiments illustrate the implementation of the present disclosure. Those skilled in the art can easily recognize further advantages and effects of the present invention from the disclosure. Obviously, the described embodiments are only part of the present disclosure and are not to be understood as all possible embodiments. The present disclosure can also be realized or applied by other different specific embodiments. The details mentioned in this description can be modified or changed in various ways depending on the perspective and application, without departing from the spirit of the disclosure. It should be noted that, in the absence of any contradictions, the following embodiments and the features contained therein can be combined with one another.Based on the present exemplary embodiments, all further embodiments derived by experts in this field without creative activity also fall within the scope of protection of the present disclosure.

[0018] In order to implement a multi-stage lifting function for the Christmas tree and to further reduce its height and volume, the present utility model is specifically described as follows.

[0019] In connection with the Fig. 1 and Fig.Figure 2 shows an embodiment of the present utility model, a three-stage, coupled lifting device for a Christmas tree equipped with an internally installed chain, comprising a base 1 and a support mounted on the base. Crucially, the support includes an outer tube 2, a middle tube 3, an inner tube 4, an upper mounting sleeve of the outer tube 5, an upper mounting sleeve of the middle tube 6, a lower mounting sleeve of the inner tube 7, an electric lifting assembly 8, and a sliding lifting cable 9. The outer tube 2, the middle tube 3, and the inner tube 4 are each hollow. The lower end of the outer tube 2 is attached to the base 1. The upper mounting sleeve of the outer tube 5 is fixed to the upper end of the outer tube 2. The middle tube 3 is guided through the upper mounting sleeve of the outer tube 5 and is slidably supported in the central hollow chamber of the outer tube 2.The upper mounting sleeve of the central tube 6 is attached to the upper end of the central tube 3. The inner tube 4 is guided through the upper mounting sleeve of the central tube 6 and is snugly mounted within the central hollow chamber of the central tube 3. The lower mounting sleeve of the inner tube 7 is attached to the lower end of the inner tube 4 and slides along the inner wall of the hollow chamber of the central tube 3. The upper mounting sleeve of the outer tube 5, the upper mounting sleeve of the central tube 6, and the lower mounting sleeve of the inner tube 7 primarily serve to prevent vibration between the inner tube 4 and the central tube 3, and between the central tube 3 and the outer tube 2, as the central tube 3 and inner tube 4 ascend. They also serve to prevent friction and the resulting noise.

[0020] The drive unit of the electric lifting assembly 8 is attached to the inside of the lower end of the outer tube 2. The lifting unit of the electric lifting assembly 8 projects into the inner tube 4. The lower end of the central tube 3 is rigidly connected to the lifting unit of the electric lifting assembly 8. The electric lifting assembly 8 is electrically connected to an external control power supply system that controls the operation of the electrical components.

[0021] One end of the sliding lifting cable 9 is attached to the lower part of the electric lifting assembly 8. The other end runs through the top of the electric lifting assembly 8, is supported there, bent back and fixed to the inner wall of the middle to lower region of the inner tube 4.

[0022] This design transforms the Christmas tree stand into an electrically operated, two-stage lifting stand. The Christmas tree components are arranged around the outside of the stand. The stand is raised and lowered via the spindle-based linear drive of the electric lifting assembly 8. Simultaneously, the sliding lifting cable 9 is attached to the electric lifting assembly 8. When the central tube 3 is raised, the lifting cable 9 moves along with it and simultaneously pulls the inner tube 4 upwards, thus achieving a two-stage lifting effect and synchronously raising the inner tube 4. This design enables a faster lifting process and reduces the height and volume when retracted, facilitating transport and setup.

[0023] Specifically, the electric lifting assembly 8 is a spindle-based linear drive device. Any device that achieves linear forward movement via a threaded spindle is suitable. No specific feed rate is required, but the feed force must be sufficient to lift the Christmas tree components.

[0024] Specifically, the spindle-based linear drive device comprises a motor 801, a motor mounting plate 802, a coupling 803, a retaining ring for the threaded rod 804, a bearing 805, a mounting plate for the threaded rod 806, a threaded rod 807, a lifting plate for the threaded rod 808, a fixing tube 809, an upper mounting plate 810, a lifting tube 811, and a lifting plate 812. The outer surface of the motor mounting plate 802 is attached to the inner surface of the lower end of the outer tube 2. The motor 801 is mounted centrally on the motor mounting plate 802. The lower end of the threaded rod 807 is positively connected to the drive shaft of the motor 801 via the coupling 803. The motor 801 drives the threaded rod 807 to rotate.

[0025] The outer surface of the mounting plate of the threaded rod 806 is attached to the inner surface of the lower end of the outer tube 2. The upper mounting plate 810 is connected to the mounting plate of the threaded rod 806 via the fixing tube 809. A bearing 805 and a retaining ring of the threaded rod 804 are attached to the outside of the upper and lower ends of the threaded rod 807, respectively. The lower end of the threaded rod 807 is rotatably mounted centrally on the mounting plate of the threaded rod 806, and the upper end is rotatably mounted on the upper mounting plate 810.

[0026] The inner surface of the lifting plate of the threaded rod 808 is provided with an internal thread that corresponds to the external thread of the threaded rod 807. The threaded rod 807 runs through the lifting plate of the threaded rod 808 and is screwed to it. The upper part of the lifting plate of the threaded rod 808 is fixedly connected to the lower end of the central tube 3. By rotating the threaded rod 807, the lifting plate 808 is moved up or down by the thread.

[0027] The lower end of the lifting tube 811 is fixed to the mounting plate of the threaded rod 806. The upper end runs through the upper mounting plate 810 and is connected to the lifting plate 811. One end of the sliding lifting cable 9 is fixed to the mounting plate of the threaded rod 806. The other end of the lifting cable 9 runs through the lifting tube 811, the upper mounting plate 810, and the lifting plate 811 is bent back and attached to the inner wall of the middle to lower section of the inner tube 4. When the middle tube 3 is lifted at the mounting plate of the threaded rod 806, the upper mounting plate 810 also lifts and pulls the lifting cable 9, which is fixed to the inner tube 4. This creates a two-stage lifting effect in which the inner tube 4 is lifted synchronously.

[0028] Specifically, the spindle-based linear actuator comprises an upper limit switch 813 and a lower limit switch 814. The upper limit switch 813 is attached to the underside of the side surface of the upper mounting plate 810. The lower limit switch 814 is attached to the top of the side surface of the mounting plate of the threaded rod 806 and is located directly opposite the underside of the lifting plate of the threaded rod 808. The upper limit switch 813 is connected in series with the lower limit switch 814 via a cable that runs through the cavity inside the inner tube 4. The motor 801 is electrically connected to an external control power supply system after being connected in series with the limit switches 813 and 814. This arrangement serves to protect the motor 801 and the lifting device by preventing overtravel and overpressure.

[0029] Specifically, the sliding lifting rope 9 consists of nylon cord, wire rope, or chain. Soft, foldable cords of the same type also achieve the desired effect.

[0030] The above embodiments serve only to illustrate the present utility model and are not intended to limit it. For those skilled in the art, all modifications, equivalent replacements, and improvements made within the spirit and principles of the present application, without involving any creative activity, also fall within the scope of protection of the present utility model. QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] CN 217285387U

[0003]

Claims

[1] A three-stage coupled lifting device for a Christmas tree, equipped with an internally installed chain, comprising a base and a support attached to the base, characterized by, that the support comprises an outer tube, a middle tube, an inner tube, an upper mounting sleeve of the outer tube, an upper mounting sleeve of the middle tube, a lower mounting sleeve of the inner tube, an electrical lifting assembly and a sliding lifting cable, wherein the outer tube, the middle tube and the inner tube are each hollow tubes, the outer tube is fixed at its lower end to the base, the upper sleeve of the outer tube is attached to the upper end of the outer tube, the middle tube passes through the upper sleeve of the outer tube and slides snugly in the central hollow chamber of the outer tube, the upper sleeve of the middle tube is attached to the upper end of the middle tube, the inner tube passes through the upper sleeve of the middle tube and slides snugly in the central hollow chamber of the middle tube, and the lower sleeve of the inner tube is attached to the lower end of the inner tube and slides against the inner wall of the middle tube hollow chamber;The drive unit of the electric lifting component is attached to the inside of the lower end of the outer tube; the lifting section of the electric lifting component projects into the inner tube; the lower end of the central tube is rigidly connected to the lifting section; and the electric lifting component is electrically connected to an external control and power supply system. One end of the sliding lifting cable is attached to the underside of the electric lifting component, the other end is passed through the top of the electric lifting component, supported there, returned, and attached to the inner wall in the lower part of the inner tube. [2] The three-stage coupled lifting device for a Christmas tree according to claim 1, equipped with an internally installed chain, characterized by that the electrical lifting component is a spindle-based linear drive device. [3] The three-stage coupled lifting device for a Christmas tree, equipped with an internally installed chain 2, characterized by, that the spindle-based linear actuator device comprises a motor, a motor mounting plate, a coupling, a threaded rod retaining ring, a bearing, a threaded rod mounting plate, a threaded rod, a threaded rod lifting plate, a fixed tube, an upper fixed plate, a lifting tube and a lifting plate, wherein the outside of the motor mounting plate is attached to the inside of the lower end of the outer tube, the motor is arranged centrally on the motor mounting plate, and the lower end of the threaded rod is positively connected to the motor's drive shaft via the coupling.The mounting plate of the threaded rod is also attached to the inside of the lower end of the outer tube, the upper fixing plate is connected to the mounting plate of the threaded rod via the fixing tube, and bearings and retaining rings of the threaded rod are attached to the outside of the upper and lower ends of the threaded rod, with the lower end of the threaded rod being rotatably mounted in the center of the mounting plate of the threaded rod, and the upper end being rotatably mounted in the center of the upper fixing plate. The lifting plate of the threaded rod has an internal thread that corresponds to the external thread of the threaded rod. The threaded rod passes through the lifting plate and is screwed to it. The lifting plate of the threaded rod is firmly connected to the lower end of the central tube at its upper end. The lower end of the lifting tube is attached to the threaded rod's mounting plate, while the upper end passes through the upper fixed plate and connects to the lifting plate. One end of the sliding lifting cable is attached to the threaded rod's mounting plate, and the other end is routed through the lifting tube, the upper fixed plate, and the lifting plate, then back and secured in the lower central section of the inner tube. [4] The three-stage coupled lifting device for a Christmas tree according to claim 3, equipped with an internally installed chain, characterized by, that the spindle-based linear actuator further comprises an upper and a lower limit switch, wherein the upper limit switch is attached to the underside of the lateral surface of the upper fixed plate, the lower limit switch is attached to the top of the lateral surface of the mounting plate of the threaded rod and is opposite the underside of the lifting plate of the threaded rod, the upper limit switch is connected in series with the lower limit switch via a cable, the cable passing through the cavity inside the inner tube, and the motor, after being connected in series with the upper and lower limit switches, is electrically connected to an external control power supply system. [5] The three-stage coupled lifting device for a Christmas tree according to claim 1, equipped with an internally installed chain, characterized by that the sliding lifting rope consists of nylon cord, wire rope or chain.

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