Basketball stand

Abstract

The invention belongs to the technical field of sports equipment, and relates to a basketball stand which comprises a stand column, a backboard and an electric lifting device arranged on the rear side of the stand column. The stand column is vertically fixed to the ground through a foundation bolt assembly. The backboard is movably connected to the front side of the stand column through an upper supporting arm and a lower supporting arm to form a four-connecting-rod mechanism. The electric lifting device comprises a transmission device and an electric driving device; the transmission device comprises a lifting pipe and a fixing pipe which are coaxially arranged, the upper end of the lifting pipe is hinged to the rear end of the lower supporting arm, the lower end of the lifting pipe is inserted into the fixing pipe, and the lower portion of the fixing pipe is hinged to the stand column; the electric driving device is mounted at the lower end of the fixed pipe and comprises a motor; a lead screw penetrates through the fixing pipe, the lower end of the lead screw is connected with an output shaft of the motor, and a nut is installed on the inner wall of the lower end of the lifting pipe and screwed with the lead screw. According to the basketball stand, the height of the backboard is conveniently adjusted in a motor driving mode, and the basketball stand is compact in structure, small in occupied area, small in motor load and convenient to disassemble, assemble and maintain.

Description

Technical Field

[0001] The invention belongs to the technical field of sports equipment, and in particular relates to a basketball stand. Background Art

[0002] Basketball is a sport that is widely loved by people of different ages. A basketball stand is a necessary equipment for a basketball court. A basketball stand usually includes a column supported on the ground, a backboard connected to one side of the upper part of the column, a basket and a net on the backboard, etc. In order to better meet the needs of people of different heights for basketball, the height of the backboard can be adjusted.

[0003] At present, some basketball stands with adjustable backboard height usually design the columns as multiple upper and lower telescopic columns, the backboard is connected to the uppermost column, and a motor is set in the lower column or the base, and the motor is used to drive the uppermost column to rise or fall to adjust the height of the backboard, such as the basketball stands disclosed in patents CN210751183U or CN110393903B; however, the relevant structural settings of this motor drive method are relatively complex, and it also occupies the space of the column or the base, making the column or the base larger, making the shape and floor space of the entire basketball stand larger; and because the motor needs to drive some columns and the backboard to move together, the motor load is large; in addition, because the motor is located inside the column or the base, it is inconvenient to disassemble and maintain the motor. Summary of the invention

[0004] In view of the deficiencies existing in the related art, the present invention provides a basketball stand to solve at least one technical problem mentioned in the background technology.

[0005] The present invention provides a basketball stand, comprising:

[0006] The column is vertically arranged on the ground; a foundation bolt assembly is buried in the ground, and the bottom end of the column is fixed to the ground through the foundation bolt assembly;

[0007] The backboard is movably connected to the front side of the column via an upper support arm and a lower support arm arranged above and below, and the upper support arm, the backboard, the lower support arm and the column are hinged to form a four-bar linkage;

[0008] An electric lifting device is arranged on the rear side of the column, and includes a transmission device and an electric drive device; the transmission device includes a lifting tube and a fixed tube coaxially arranged above and below; the upper end of the lifting tube is hinged to the end of the lower support arm extending out of the rear side of the column, and the lower end is inserted into the fixed tube, and the lower part of the fixed tube is hinged to the column; the electric drive device is installed at the lower end of the fixed tube, and the electric drive device includes a motor; a lead screw is inserted into the fixed tube, and the lower end of the lead screw is connected to the output shaft of the motor; a nut is installed on the inner wall of the lower end of the lifting tube, and the nut is threadedly connected to the lead screw; when the motor is started, the lead screw rotates with the output shaft of the motor, driving the nut and the lifting tube to move relative to the fixed tube, thereby driving the lower support arm and the upper support arm to rotate to realize the lifting of the backboard.

[0009] In some of the embodiments, the electric drive device also includes an electrical box, which is a closed shell and is sealed and connected to the lower end of the fixed tube; the motor is installed in the electrical box, and the lower end of the screw extends into the electrical box and is connected to the motor output shaft via a coupling; a switch is installed on the electrical box, and the switch is connected to the motor to control the forward or reverse rotation of the motor, thereby raising or lowering the backboard.

[0010] In some of the embodiments, the electric drive device also includes a controller and a switching power supply installed in the electrical box; the controller is electrically connected to the switching power supply through a power module, the motor is connected to the switching power supply, and the switching power supply is connected to an external AC power supply via a power cord; the motor is a stepper motor, the V+ port, PUL+ port, and DIR+ port of the motor are connected to the switching power supply, and the PUL- port of the motor is connected to the PUL- port of the controller; the switch is a self-resetting normally open 6-pin rocker switch, the first pin of the switch is connected to the DIR- port of the motor, the second pin is connected to the start end of the controller and the V- port of the motor, the third pin, the fourth pin and the fifth pin are grounded, and the sixth pin is suspended; when the switch is pressed, the first pin is connected to the third pin or the sixth pin, and the second pin is connected to the fourth pin or the fifth pin, and the motor rotates forward or reversely; when the switch is released, the first pin is disconnected from the third pin or the sixth pin, and the second pin is disconnected from the fourth pin or the fifth pin, and the motor stops.

[0011] In some of the embodiments, the inner cavity of the electrical box includes a drive cavity, a motor cavity and a control cavity that are isolated from each other. The drive cavity is located below the fixed tube, the motor cavity is located below the drive cavity, and the control cavity is located on the side of the drive cavity and the motor cavity away from the column; the motor is installed in the motor cavity, the motor output shaft extends into the drive cavity, and the lower end of the lead screw extends into the drive cavity to be connected with the motor output shaft; the controller, the switching power supply and the switch are all installed in the control cavity, and the operating surface of the switch is exposed on the outer surface of the electrical box.

[0012] In some embodiments, the transmission device also includes an outer sleeve and a compression spring; the outer sleeve is placed on the outside of the fixed tube and the lifting tube, the lower end of the outer sleeve is connected to the side wall of the fixed tube, and an upper retaining ring is installed on the inner wall of the upper end of the outer sleeve; a lower retaining ring is installed on the outer wall of the lifting tube below the upper retaining ring, and the compression spring is placed outside the lifting tube and clamped between the upper retaining ring and the lower retaining ring.

[0013] In some of the embodiments, the transmission device further comprises a protective tube covered on the outside of the lifting tube, the upper portion of the protective tube is fixedly connected to the lifting tube, and the lower portion of the protective tube is sleeved on the outside of the outer sleeve.

[0014] In some of the embodiments, an upper limit plate is installed at the upper end of the screw, and a lower limit plate is also installed at the lower part of the screw. The nut is screwed on the screw between the upper limit plate and the lower limit plate; the top and bottom ends of the nut are respectively provided with stop sleeves, and the stop sleeves do not contact the screw.

[0015] In some of the embodiments, a positioning ring is installed on the lower inner wall of the fixed tube, the screw passes through the positioning ring and the bottom surface of the lower limit plate is crimped against the positioning ring; a pin is vertically inserted on the screw below the positioning ring, and a bearing and a ring washer sleeved on the screw are sandwiched between the pin and the positioning ring; an assembly hole is opened on the tube wall at the lower part of the fixed tube, and the bearing, the ring washer and the pin are installed on the screw through the assembly hole; a cover plate is installed outside the assembly hole.

[0016] In some of the embodiments, a stop assembly is provided on the upper rear side of the column, and the stop assembly includes a stop sleeve, a stop shaft and a locking pin; the stop sleeve is laterally fixed to the rear side of the column, the stop shaft is detachably inserted into the stop sleeve, and the locking pin vertically passes through the stop sleeve and the stop shaft; the stop shaft is located above the lower arm to limit the uppermost position of the rear end of the lower arm when the lower arm rotates.

[0017] In some embodiments, the anchor bolt assembly includes at least two U-shaped anchor bolts, and the plurality of U-shaped anchor bolts are cross-arranged.

[0018] Based on the above technical solution, the basketball stand in the embodiment of the present invention solves the problems of the prior art in adjusting the height of the backboard, such as complex electric drive related structure setting, large motor load, inconvenient motor disassembly and maintenance, and large basketball stand appearance and footprint. Through the specific setting of the electric drive device and the transmission device, convenient adjustment of the backboard height is achieved, and the overall structure of the basketball stand is compact, the footprint is small, the motor load is small, and the disassembly and maintenance are more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0020] Figure 1 It is a structural schematic diagram of the basketball stand of the present invention;

[0021] Figure 2 It is a structural cross-sectional view of the electric lifting device in the basketball stand of the present invention;

[0022] Figure 3 for Figure 2 A in the enlarged view;

[0023] Figure 4 for Figure 2 The enlarged view of point B in the figure;

[0024] Figure 5 for Figure 2 The enlarged view of point C in the figure;

[0025] Figure 6 It is a structural explosion diagram of the electric drive device in the basketball stand of the present invention;

[0026] Figure 7 It is a wiring diagram of the electric drive device in the basketball stand of the present invention;

[0027] Figure 8 for Figure 1 The enlarged view of point D in the figure;

[0028] Fig. 9 for Figure 1 The enlarged view of point E in the figure;

[0029] Fig.10 for Figure 1 Structural cross-sectional view at E in FIG.

[0030] In the figure:

[0031] 10. Column; 11. Anchor bolt assembly; 12. Backboard; 13. Upper arm; 14. Lower arm; 15. Stop sleeve; 16. Stop shaft; 17. Lock pin; 18. Connecting seat; 20. Electric drive device; 21. Electrical box; 211. Drive cavity; 212. Motor cavity; 213. Control cavity; 22. Motor; 221. Output shaft; 222. Coupling; 23. Switch; 24. Controller; 25. Switch power supply; 26. Electric Source line; 30, transmission device; 31, lifting tube; 311, lower retaining ring; 32, fixing tube; 321, positioning ring; 322, assembly hole; 323, cover plate; 324, oil nozzle; 33, lead screw; 331, upper limit plate; 332, lower limit plate; 333, pin shaft; 334, bearing; 335, ring gasket; 34, nut; 341, retaining sleeve; 35, outer sleeve; 351, upper retaining ring; 36, compression spring; 37, protective tube. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0033] In the description of the present invention, it should be understood that the terms "center", "lateral", "longitudinal", "up", "down", "top", "bottom", "inside", "outside", "left", "right", "front", "back", "vertical", "horizontal", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0034] The terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first", "second", etc. may explicitly or implicitly include one or more of the features.

[0035] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] refer to Figure 1-Figure 10 As shown, the present invention provides a basketball stand, including a column 10, a backboard 12 arranged on the front side of the column 10, and an electric lifting device arranged on the rear side of the column 10.

[0037] The column 10 is vertically arranged on the ground; an anchor bolt assembly 11 is buried in the ground, and the threaded connection section of the anchor bolt assembly 11 is exposed outside the ground; a connecting flange is provided at the bottom end of the column 10 to fix the column 10 to the ground through the anchor bolt assembly 11. When installing the column 10, the anchor bolt assembly 11 is usually buried in the ground concrete first, and then the column 10 is connected to the anchor bolt assembly 11 after the concrete is completely solidified. Furthermore, the anchor bolt assembly 11 includes at least two U-shaped anchor bolts, and the multiple U-shaped anchor bolts are arranged crosswise, which can improve the connection strength of the anchor bolt assembly 11 in the ground and ensure the stability of the connection between the column 10 and the ground.

[0038] The backboard 12 is movably connected to the front side of the column 10 through the upper arm 13 and the lower arm 14 arranged up and down. The upper arm 13, the backboard 12, the lower arm 14 and the column 10 are hinged to form a four-bar linkage. A basket and a net are installed on the front side of the backboard 12.

[0039] The electric lifting device includes a transmission device 30 and an electric drive device 20. The transmission device 30 includes a lifting tube 31 and a fixing tube 32 coaxially arranged above and below; the upper end of the lifting tube 31 is hinged to the end of the lower arm 14 extending out of the rear side of the column 10, and the lower end of the lifting tube 31 is inserted into the fixing tube 32; the lower part of the fixing tube 32 is hinged to the column 10 through a connecting seat 18. The electric drive device 20 is installed at the lower end of the fixing tube 32, and the electric drive device 20 includes a motor 22. A screw-nut transmission mechanism is provided between the fixed tube 32 and the lifting tube 31, so that the lifting tube 31 can reciprocate along the axial direction of the fixed tube 32; specifically, a screw 33 is inserted into the fixed tube 32, and the lower end of the screw 33 is connected to the output shaft 221 of the motor 22 of the electric drive device 20, and the output shaft 221 of the motor 22 is coaxially arranged with the screw 33, and the upper end of the screw 33 is located in the lifting tube 31; a nut 34 is installed in the inner wall of the lower end of the lifting tube 31, and the nut 34 is threadedly connected to the screw 33.

[0040] When the motor 22 is started, the output shaft 221 of the motor 22 rotates, and the screw 33 rotates synchronously with the output shaft 221 of the motor 22, driving the nut 34 to move along the screw 33. The lifting tube 31 moves axially relative to the fixed tube 32 under the drive of the nut 34, that is, it extends or shortens relative to the fixed tube 32, thereby driving the lower arm 14 to rotate around the hinge point between the lower arm 14 and the column 10, thereby driving the upper arm 13 in the four-bar linkage to rotate and the backboard 12 to rise or fall, thereby adjusting the height of the backboard 12, that is, the height of the basket; when the motor 22 is not working, the screw 33 and the nut 34 are locked with each other, and the lifting tube 31 will not move, so that the height of the backboard 12, that is, the height of the basket, remains unchanged.

[0041] The above-mentioned schematic embodiment, by arranging the electric drive device 20 and the transmission device 30 on the rear side of the column 10, realizes the convenient adjustment of the height of the backboard 12 by using the motor 22 drive mode; moreover, compared with the scheme in the prior art that the motor 22 also needs to drive part of the column 10 to move with the backboard 12, the motor 22 in this embodiment mainly drives the backboard 12 and the upper and lower arms 14 to move, and the load of the motor 22 is relatively small; compared with the scheme in the prior art that the motor 22 is arranged in the column 10 or in the base, the electric drive device 20 in this embodiment is arranged outside the column 10, and there is no need to design a larger column 10 or base, so that the structural layout of the entire basketball stand is compact, the appearance is small, and the disassembly and maintenance of the motor 22 are more convenient; in addition, in this embodiment, the column 10 is installed on the ground by the anchor bolt assembly 11, and there is no need to set up an additional base, which further reduces the appearance and footprint of the entire basketball stand.

[0042] refer to Figure 3 , Figure 6 As shown, in some embodiments, the electric drive device 20 further includes an electrical box 21, which is a closed housing and is sealed and connected to the lower end of the fixed tube 32; it is understandable that the lower end of the fixed tube 32 is provided with a connecting flange, and a sealed connection is achieved between the electrical box 21 and the electrical box 21 through bolts and sealing gaskets. The motor 22 is installed in the electrical box 21, and the lower end of the lead screw 33 extends into the electrical box 21 and is connected to the output shaft 221 of the motor 22 through a coupling 222. A wear-resistant sleeve or a small bearing can be provided on the wall of the electrical box 21 at the penetration of the lead screw 33, and a pin or other limiting structure is provided on one or both sides thereof to prevent the wear-resistant sleeve or the small bearing from dislocating. A switch 23 is installed on the electrical box 21, and the switch 23 is connected to the motor 22. The switch 23 is provided with an ascending or descending mark; the switch 23 is used to control the forward or reverse rotation of the motor 22 to drive the lifting tube 31 to extend or shorten relative to the fixed tube 32, thereby raising or lowering the backboard 12.

[0043] refer to Figure 3 , Figure 6 , Figure 7 As shown, in some embodiments, the electric drive device 20 further includes a controller 24 and a switching power supply 25 installed in the electrical box 21; the controller 24 is electrically connected to the switching power supply 25 through a power module, the motor 22 is connected to the switching power supply 25, and the switching power supply 25 is connected to an external AC power supply through a power line 26; the switching power supply 25 is used to convert the external AC power into DC power, and the DC power is input into the controller 24 after being stepped down by the power module, and the controller 24 outputs a pulse current signal, and the motor 22 is a stepper motor 22. The V+ port, PUL+ port, and DIR+ port of the motor 22 are connected to the power module, and the PUL- port of the motor 22 is connected to the PUL- port of the controller 24. The pulse signal is transmitted to the PUL- port of the motor 22 through the PUL- port of the controller 24, and the pulse signal is always present after the switching power supply 25 is connected to the AC power. The switch 23 is a self-resetting normally open 6-pin rocker switch 23. The first pin (K-1) of the switch 23 is connected to the DIR-port of the motor 22, the second pin (K-2) is connected to the start end of the controller 24 and the V-port of the motor 22, the third pin (K-3), the fourth pin (K-4) and the fifth pin (K-5) are grounded, and the sixth pin (K-6) is suspended.

[0044] Further explanation, the setting of switch 23 forms two sets of circuits isolated from each other; when the first pin (K-1) is connected to the third pin (K-3) and the second pin (K-2) is connected to the fourth pin (K-4), the V-port of motor 22 and the start end of controller 24 are both connected to the GND ground terminal, the DIR-port of motor 22 is also connected to the GND ground terminal, and motor 22 will reverse; when the first pin (K-1) is connected to the sixth pin (K-6) and the second pin (K-2) is connected to the fifth pin (K-5), the V-port of motor 22 and the start end of controller 24 are both connected to the GND ground terminal, the DIR-port of motor 22 is not connected to electricity and is suspended, and the motor 22 will rotate forward; therefore, when the rising or falling mark on the switch 23 is pressed and held, the DC power is connected to the motor 22, and the motor 22 starts to rotate forward or reverse, driving the lifting tube 31 to extend and retract, thereby causing the backboard 12 to rise or fall; when the switch 23 is released, the first pin (K-1) is disconnected from the third pin (K-3) or the sixth pin (K-6), and the second pin (K-2) is disconnected from the fourth pin (K-4) or the fifth pin (K-5), that is, the switch 23 automatically returns to the normally open position, the DC power connected to the motor 22 is disconnected, the motor 22 stops rotating, the lifting tube 31 stops extending and retracting, and the height adjustment of the backboard 12 is completed and maintained at the current position.

[0045] The above-mentioned illustrative embodiment refines the component settings within the electric drive device 20 and the wiring settings between the components. Through the matching connection between the stepper motor 22, the controller 24 and the self-resetting normally open 6-pin rocker switch 23, after the switch power supply 25 is powered, the lifting and lowering of the backboard 12 can be easily controlled by pressing the rising or falling mark on the switch 23, and when the backboard 12 reaches the target height, the height of the backboard 12 can be locked by releasing the switch 23.

[0046] refer to Figure 3 , Figure 6As shown, in some embodiments, the inner cavity of the electrical box 21 includes a mutually isolated drive cavity 211, a motor cavity 212, and a control cavity 213; the drive cavity 211 is located below the fixed tube 32, the motor cavity 212 is located below the drive cavity 211, and the control cavity 213 is located on the side of the drive cavity 211 and the motor cavity 212 away from the column 10. The motor 22 is installed in the motor cavity 212, the output shaft 221 of the motor 22 extends into the drive cavity 211, and the lower end of the lead screw 33 extends into the drive cavity 211 to connect with the output shaft 221 of the motor 22; the controller 24, the switching power supply 25, and the switch 23 are all installed in the control cavity 213, and the operating surface of the switch 23 is exposed to the outer surface of the electrical box 21; the switching power supply 25 is close to the inner cavity wall of the electrical box 21, and heat can be dissipated through the cavity; the power line 26 is sealed and penetrates the electrical box 21 to connect with the external AC power supply. It should be noted that the three cavities of the drive cavity 211, the motor cavity 212 and the control cavity 213 all have external openings, which are sealed by pads and sealing pads to ensure the overall sealing of the electrical box 21, so that the electric drive device 20 meets the requirements of outdoor use. This exemplary embodiment separates the motor 22, the output shaft 221 of the motor 22 and the coupling 222, the switching power supply 25 and the controller 24 by setting a plurality of mutually isolated chambers in the electrical box 21, thereby realizing the partitioning of the components of the electric drive device 20, reducing the mutual influence between the rotating components and the stationary components, and improving the reliability of the electric drive device 20.

[0047] refer to Figure 2 , Figure 4 , Figure 5 As shown, in some embodiments, the transmission device 30 further includes an outer sleeve 35 and a compression spring 36; the outer sleeve 35 is sleeved on the outside of the fixed tube 32 and the lifting tube 31, the lower end of the outer sleeve 35 is connected to the side wall of the fixed tube 32, and an upper retaining ring 351 is installed in the inner wall of the upper end of the outer sleeve 35; the lifting tube 31 passes through the upper retaining ring 351, and a lower retaining ring 311 is installed on the outer wall of the lifting tube 31 below the upper retaining ring 351, and the compression spring 36 is sleeved on the outside of the lifting tube 31 and sandwiched between the upper retaining ring 351 and the lower retaining ring 311; the number of the compression spring 36 is at least one. When the lifting tube 31 moves axially back and forth relative to the fixed tube 32, the lower retaining ring 311 moves synchronously with the lifting tube 31, and the distance between the upper retaining ring 351 and the lower retaining ring 311 changes, so that the elastic force of the compression spring 36 changes accordingly. This exemplary embodiment balances the weight of the backboard 12 by disposing the compression spring 36 , which saves effort when the backboard 12 is raised; the compression spring 36 is protected by disposing the outer sleeve 35 .

[0048] refer to Figure 2 , Figure 5 , Figure 8As shown, in some embodiments, the transmission device 30 also includes a protective tube 37 covered on the outside of the lifting tube 31, and the top of the protective tube 37 is closed; the upper part of the protective tube 37 is fixedly connected to the lifting tube 31, and the lower part of the protective tube 37 is sleeved on the outside of the outer sleeve 35; the protective tube 37 moves synchronously with the lifting tube 31, providing protection for the transmission device 30 including the lifting tube 31, preventing the transmission device 30 from being eroded by external rain, snow, sand and dust, and meeting the needs of outdoor use.

[0049] refer to Figure 2 , Figure 4 As shown, in some embodiments, an upper limit plate 331 is installed at the upper end of the lead screw 33, and the upper limit plate 331 is located in the lifting tube 31; a lower limit plate 332 is also installed at the lower part of the lead screw 33, and the lower limit plate 332 is located in the fixed tube 32; the nut 34 is screwed on the lead screw 33 between the upper limit plate 331 and the lower limit plate 332. The top and bottom ends of the nut 34 are respectively provided with a stopper sleeve 341, and the stopper sleeve 341 does not contact the lead screw 33. This exemplary embodiment limits the movement range of the nut 34, that is, the telescopic limit of the lifting tube 31, and further limits the adjustment range of the height of the backboard 12 through the setting of the upper limit plate 331 and the lower limit plate 332 on the lead screw 33; the setting of the stopper sleeve 341 prevents the nut 34 from being stuck with the lead screw 33 when it moves to the upper and lower limit plates 332.

[0050] refer to Figure 1 , Fig. 9 , Fig.10 As shown, in some embodiments, a positioning ring 321 is installed on the lower inner wall of the fixed tube 32, the lead screw 33 passes through the positioning ring 321, and the bottom surface of the lower limit plate 332 is pressed against the positioning ring 321; a pin shaft 33 is vertically inserted on the lead screw 33 located below the positioning ring 321, and a bearing 334 and a ring washer 335 sleeved on the lead screw 33 are sandwiched between the pin shaft 33 and the positioning ring 321; the lead screw 33 is axially limited by the setting of the positioning ring 321 and the pin shaft 33 to prevent the lead screw 33 from moving; the setting of the bearing 334 eliminates small assembly errors, makes the lead screw 33 rotate more smoothly, and improves its service life. An assembly hole 322 is opened on the tube wall of the lower part of the fixed tube 32, so that the bearing 334, the ring washer 335 and the pin shaft 33 can be installed on the lead screw 33 through the assembly hole 322; a cover plate 323 is installed outside the assembly hole 322 to seal and protect the fixed tube 32. An oil nozzle 324 is also mounted on the side wall of the fixed tube 32 located above the positioning ring 321 , and grease can be added to the inside of the fixed tube 32 through the oil nozzle 324 to maintain smooth transmission between the lead screw 33 and the nut 34 .

[0051] refer to Figure 1 , Figure 8As shown, in some embodiments, a stop assembly is provided at the upper rear side of the column 10, and the stop assembly includes a stop sleeve 15, a stop shaft 16 and a locking pin 17; the stop sleeve 15 is laterally fixed to the rear side of the column 10, that is, the stop sleeve 15 extends along the left and right directions of the column 10, and the stop sleeve 15 can be welded to the column 10; the stop shaft 16 is detachably inserted into the stop sleeve 15, and the locking pin 17 vertically penetrates the stop sleeve 15 and the stop shaft 16, and is used to lock the stop shaft 16 on the stop sleeve 15 to prevent the stop shaft 16 from escaping from the stop sleeve 15; the locking pin 17 includes a latch and an elastic hoop connected to both ends of the latch; further, the length of the stop sleeve 15 is less than the minimum distance between the lower arm 14 and the left and right sides of the column 10, and the length of the stop shaft 16 is greater than the minimum distance between the lower arm 14 and the left and right sides of the column 10. When the lower arm 14 is connected to the column 10, the lower arm 14 is rotated to a suitable angle, the stop shaft 16 is inserted into the stop sleeve 15, and then the pin is inserted and the elastic hoop is clamped. At this time, the stop shaft 16 is located above the lower arm 14, and the uppermost position of the rear end of the lower arm 14 is limited when the lower arm 14 rotates, that is, the lowest position of the height of the backboard 12 is limited, which further ensures the safety when the height of the backboard 12 is lowered.

[0052] In summary, the basketball stand of the present invention uses a new electric lifting device to achieve convenient adjustment of the height of the backboard 12, and the overall structure of the basketball stand is compact, occupies a small area, the load of the motor 22 is small, and disassembly and maintenance are more convenient, which is suitable for mass production and promotion and application.

[0053] Finally, it should be noted that: the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0054] The above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the present invention, which should be included in the scope of the technical solution for protection of the present invention.

Claims

1. A basketball stand, characterized in that: include: A column is vertically arranged on the ground; an anchor bolt assembly is buried in the ground, and the bottom end of the column is fixed to the ground via the anchor bolt assembly; A backboard, which is movably connected to the front side of the column via an upper support arm and a lower support arm arranged above and below, and the upper support arm, the backboard, the lower support arm and the column are hinged to form a four-bar linkage; An electric lifting device is arranged on the rear side of the column, and comprises a transmission device and an electric drive device; the transmission device comprises a lifting tube and a fixed tube coaxially arranged above and below; the upper end of the lifting tube is hinged to the end of the lower support arm extending out of the rear side of the column, and the lower end is inserted into the fixed tube, and the lower part of the fixed tube is hinged to the column; the electric drive device is installed at the lower end of the fixed tube, and the electric drive device comprises a motor; a lead screw is inserted into the fixed tube, and the lower end of the lead screw is connected to the motor output shaft; a nut is installed on the inner wall of the lower end of the lifting tube, and the nut is threadedly connected to the lead screw; when the motor is started, the lead screw rotates with the motor output shaft, driving the nut and the lifting tube to move relative to the fixed tube, thereby driving the lower support arm and the upper support arm to rotate to realize the lifting and lowering of the backboard.

2. The basketball stand according to claim 1, characterized in that: The electric drive device also includes an electrical box, which is a sealed shell and is sealed and connected to the lower end of the fixed tube; the motor is installed in the electrical box, and the lower end of the lead screw extends into the electrical box and is connected to the motor output shaft via a coupling; a switch is installed on the electrical box, and the switch is connected to the motor to control the forward or reverse rotation of the motor, thereby raising or lowering the backboard.

3. The basketball stand according to claim 2, characterized in that: The electric drive device also includes a controller and a switching power supply installed in the electrical box; the controller is electrically connected to the switching power supply through a power module, the motor is connected to the switching power supply, and the switching power supply is connected to an external AC power supply via a power cord; the motor is a stepper motor, the V+ port, PUL+ port, and DIR+ port of the motor are connected to the power module, and the PUL- port of the motor is connected to the PUL- port of the controller; the switch is a self-resetting normally open 6-pin rocker switch, the first pin of the switch is connected to the DIR- port of the motor, the second pin is connected to the start end of the controller and the V- port of the motor, the third pin, the fourth pin and the fifth pin are grounded, and the sixth pin is suspended; when the switch is pressed, the first pin is connected to the third pin or the sixth pin, and the second pin is connected to the fourth pin or the fifth pin, and the motor rotates forward or reversely; when the switch is released, the first pin is disconnected from the third pin or the sixth pin, and the second pin is disconnected from the fourth pin or the fifth pin, and the motor stops.

4. The basketball stand according to claim 3, characterized in that: The inner cavity of the electrical box includes a drive cavity, a motor cavity and a control cavity which are isolated from each other. The drive cavity is located below the fixed tube, the motor cavity is located below the drive cavity, and the control cavity is located on the side of the drive cavity and the motor cavity away from the column; the motor is installed in the motor cavity, the motor output shaft extends into the drive cavity, and the lower end of the lead screw extends into the drive cavity to be connected with the motor output shaft; the controller, the switching power supply and the switch are all installed in the control cavity, and the operating surface of the switch is exposed from the outer surface of the electrical box.

5. The basketball stand according to claim 1, characterized in that: The transmission device also includes an outer sleeve and a compression spring; the outer sleeve is placed on the outside of the fixed tube and the lifting tube, the lower end of the outer sleeve is connected to the side wall of the fixed tube, and an upper retaining ring is installed on the inner wall of the upper end of the outer sleeve; a lower retaining ring is installed on the outer wall of the lifting tube below the upper retaining ring, and the compression spring is placed outside the lifting tube and clamped between the upper retaining ring and the lower retaining ring.

6. The basketball stand according to claim 5, characterized in that: The transmission device also includes a protective tube covered on the outside of the lifting tube, the upper part of the protective tube is fixedly connected to the lifting tube, and the lower part of the protective tube is sleeved on the outside of the outer sleeve.

7. The basketball stand according to claim 1, characterized in that: An upper limit plate is installed at the upper end of the lead screw, and a lower limit plate is also installed at the lower part of the lead screw. The nut is screwed on the lead screw between the upper limit plate and the lower limit plate; the top and bottom ends of the nut are respectively provided with stop sleeves, and the stop sleeves do not contact the lead screw.

8. The basketball stand according to claim 7, characterized in that: A positioning ring is installed on the lower inner wall of the fixed tube, the lead screw passes through the positioning ring and the bottom surface of the lower limit plate is crimped against the positioning ring; a pin is vertically inserted on the lead screw below the positioning ring, and a bearing and a ring washer sleeved on the lead screw are sandwiched between the pin and the positioning ring; an assembly hole is opened on the tube wall of the lower part of the fixed tube, and the bearing, the ring washer and the pin are installed on the lead screw through the assembly hole; a cover plate is installed outside the assembly hole.

9. The basketball stand according to claim 1, characterized in that: A stop assembly is provided at the upper rear side of the column, and the stop assembly includes a stop sleeve, a stop shaft and a locking pin; the stop sleeve is transversely fixed to the rear side of the column, the stop shaft is detachably inserted into the stop sleeve, and the locking pin vertically penetrates the stop sleeve and the stop shaft; the stop shaft is located above the lower arm to limit the uppermost position of the rear end of the lower arm when the lower arm rotates.

10. The basketball stand according to claim 1, characterized in that: The anchor bolt assembly includes at least two U-shaped anchor bolts, and a plurality of the U-shaped anchor bolts are cross-arranged.

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