Adjustable shelf spacing

Abstract

This application provides an adjustable shelf spacing rack, belonging to the field of racking technology. The adjustable shelf spacing rack includes a frame and a lifting mechanism. Several shelves are vertically arrayed within the frame. The lifting mechanism includes a lead screw, which is rotatably connected to the frame. A pin plate, a clutch mechanism, and an operating mechanism are provided at the bottom of each shelf. The clutch mechanism includes a threaded sleeve, which is rotatably connected to the shelf. This application has the following advantages: In the non-adjustable state, the clutch mechanism allows the threaded sleeve to rotate freely, unaffected by the lead screw. At this time, the pin plate is inserted into the pin groove to support the shelf. In the adjustable state, the pin plate leaves the pin groove, and the clutch mechanism keeps the threaded sleeve fixed to the shelf. The lead screw of the lifting mechanism can drive the shelf to adjust vertically. The operating mechanism simplifies operation by switching the actions of the pin plate and the clutch mechanism. Each shelf can independently switch its adjustment state, achieving independent lifting and lowering of each shelf under load.

Description

Technical Field

[0001] This application relates to the field of shelving technology, and more specifically, to an adjustable shelf. Background Technology

[0002] Logistics racks are common shelves used for stacking logistics. Based on logistics information, logistics racks can be classified and placed in different categories, making it convenient to quickly find the corresponding items based on the information. There are many types of logistics racks on the market, and most logistics racks are generally composed of a vertical frame and shelves fixed on the frame.

[0003] To facilitate assembly and adjustment of shelf spacing, slots are typically arrayed on the uprights, and the shelves are connected using appropriate slots. However, this method requires removing and reassembling the shelves under non-load-bearing conditions, which is very inconvenient. Utility Model Content

[0004] To overcome the above deficiencies, this application provides an adjustable shelf, which aims to improve the problems mentioned in the background art.

[0005] This application provides an adjustable shelf, including a frame and a lifting mechanism. Several shelves are vertically arrayed within the frame. The lifting mechanism includes a lead screw rotatably connected to the frame. A pin plate, a clutch mechanism, and an operating mechanism are provided at the bottom of each shelf. The clutch mechanism includes a threaded sleeve rotatably connected to the shelf. The lead screw is threaded through and screwed into all the vertically arranged threaded sleeves. The inner wall of the frame has an array of pin grooves adapted to the pin plate. The pin plate is movably pinned to the frame. The operating mechanism is linked with the clutch mechanism and the pin plate.

[0006] In one specific implementation, the lifting mechanism further includes a dual-headed motor, with bevel gears fixedly connected to both output ends of the motor and the lead screw, and the pairs of bevel gears meshing with each other.

[0007] In the above process, the motor drives two lead screws to rotate synchronously through two pairs of bevel gears, thereby driving the shelf to rise and fall smoothly.

[0008] In one specific implementation, the clutch mechanism further includes a brake lever, which is slidably connected to the shelf and abuts against the outer circle of the threaded sleeve.

[0009] In the above process, the brake rod and the threaded sleeve are engaged. When the brake rod and the threaded sleeve are engaged, the screw drives the shelf to rise and fall. When the brake rod and the threaded sleeve are separated, the threaded sleeve rotates with the screw, and the shelf remains stationary. It should be noted that when the lifting adjustment begins, the pin plate begins to move outward, and at the same time, the brake rod moves towards the threaded sleeve. Only after the brake rod and the threaded sleeve are engaged does the pin plate completely leave the pin groove. Similarly, after the lifting adjustment is completed, the pin plate begins to move towards the pin groove. Only after the pin plate enters the pin groove does the brake rod completely separate from the threaded sleeve. That is to say, when the pin plate is located at the opening of the pin groove, the brake rod and the threaded sleeve are in a preliminary engagement state, which can prevent the shelf from losing support and falling.

[0010] In one specific implementation, the clutch mechanism further includes a spring, the two ends of which abut against the brake lever and the shelf, respectively.

[0011] In the above implementation process, the spring is used to keep the brake lever away from the screw sleeve, and at the same time apply a reset torque to the operating mechanism so that the pin plate remains in pin engagement with the frame. It should be noted that the surfaces of the pin plate and the frame that abut against each other are provided with anti-slip textures to reduce the possibility of loosening. On the other hand, there is a gap between the pin plate and the pin groove in the vertical direction. When the brake lever leaves the screw sleeve, the shelf loses the support of the screw and falls. At this time, the pin plate falls on the inner wall of the pin groove, forming an anti-slip texture engagement state. This setting can reduce the resistance of the pin plate inserting into the pin groove.

[0012] In one specific implementation, the operating mechanism includes a double-headed cam, which is rotatably connected to the shelf, and the two ends of the cam respectively abut against the inner ends of the corresponding brake levers.

[0013] In the above process, when not adjusting, the spring pushes the brake lever towards the cam. When adjusting, the cam rotates, pushing the brake levers on both sides outward and engaging with the screw sleeve. The cam and the tail end of the brake lever form an over-center locking effect, maintaining the braking effect.

[0014] In one specific implementation, the operating mechanism further includes a swing arm, which is fixedly connected to the cam. Each end of the swing arm is hinged with a connecting rod, and the two connecting rods are respectively hinged to the corresponding pin plates.

[0015] In the above implementation process, when the cam rotates, the rocker arm also drives the slide bar and pin plate to retract through the connecting rod, achieving two effects of unlocking and screwing in one action, which simplifies the operation.

[0016] In one specific implementation, the operating mechanism further includes a handle, which is fixedly connected to the cam.

[0017] In the above process, the handle has a certain lever arm to reduce manual labor, and the operator turns the handle to enter the adjustment state.

[0018] In one specific implementation, rollers are provided at each of the four corners of the shelf and are fixedly connected to the frame.

[0019] In the above implementation process, the shelf is supported by only two lead screws when it is raised and lowered. To ensure smooth raising and lowering, rollers extend vertically from the four corners of the shelf to stabilize the shelf's posture and prevent it from tilting.

[0020] Compared with the prior art, the beneficial effects of this application are as follows: In the non-adjustment state, the clutch mechanism keeps the screw sleeve rotating freely and is not affected by the lead screw. At this time, the pin plate is inserted into the pin groove to support the shelf. In the adjustment state, the pin plate leaves the pin groove, and the clutch motor keeps the screw sleeve fixed to the shelf. The lead screw of the lifting mechanism can drive the shelf to adjust vertically. The operation of switching the pin plate and clutch mechanism is simplified by using the operating mechanism. Each shelf can independently switch the adjustment state, realizing independent lifting and lowering of each shelf under load. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of an adjustable shelf provided in an embodiment of this application; Figure 2 A schematic diagram illustrating the connection relationship between the lifting mechanism and the shelf provided in this embodiment of the application; Figure 3 A schematic diagram showing the connection relationship between the operating mechanism, the pin plate, and the clutch mechanism provided in the embodiments of this application.

[0023] In the diagram: 10-Frame; 20-Shelf; 21-Roller; 30-Lifting mechanism; 31-Screw; 32-Motor; 33-Bevel gear; 40-Pin plate; 50-Clutch mechanism; 51-Screw sleeve; 52-Brake lever; 53-Spring; 60-Operating mechanism; 61-Cam; 62-Swing arm; 63-Connecting rod; 64-Handle. Detailed Implementation

[0024] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings.

[0025] Please see Figures 1-3This application provides an adjustable shelf, including a frame 10 and a lifting mechanism 30. Several shelves 20 are vertically arranged inside the frame 10. The lifting mechanism 30 includes a lead screw 31, which is rotatably connected to the frame 10. A pin plate 40, a clutch mechanism 50 and an operating mechanism 60 are provided at the bottom of the shelf 20. The clutch mechanism 50 includes a screw sleeve 51, which is rotatably connected to the shelf 20. The lead screw 31 is threaded through and screwed into all the vertical screw sleeves 51. The inner wall of the frame 10 is arrayed with pin grooves that are adapted to the pin plate 40. The pin plate 40 is movably pinned to the frame 10. The operating mechanism 60 is linked with the clutch mechanism 50 and the pin plate 40. In the non-adjustment state, the clutch mechanism 50 keeps the screw sleeve 51 rotating freely, unaffected by the lead screw 31. At this time, the pin plate 40 is inserted into the pin groove to support the shelf 20. In the adjustment state, the pin plate 40 leaves the pin groove, and the clutch mechanism keeps the screw sleeve 51 fixed to the shelf 20. The lead screw 31 of the lifting mechanism 30 can drive the shelf 20 to adjust vertically. The operation of the pin plate 40 and the clutch mechanism 50 is switched by the operating mechanism 60, which simplifies the operation. Each shelf 20 can independently switch the adjustment state, realizing independent lifting and lowering of each shelf 20 under load.

[0026] Please see Figures 1-3 The lifting mechanism 30 also includes a dual-headed motor 32. Both output ends of the motor 32 and the lead screw 31 are fixedly connected to bevel gears 33, which mesh with each other. The motor 32 drives the two lead screws 31 to rotate synchronously through the two pairs of bevel gears 33, thereby driving the shelf 20 to rise and fall smoothly.

[0027] Please see Figures 1-3 The clutch mechanism 50 also includes a brake lever 52, which is slidably connected to the shelf 20 and abuts against the outer circle of the threaded sleeve 51. The brake lever 52 and the threaded sleeve 51 are engaged. When the brake lever 52 and the threaded sleeve 51 are engaged, the screw 31 drives the shelf 20 to rise and fall. When the brake lever 52 and the threaded sleeve 51 are disengaged, the threaded sleeve 51 rotates with the screw 31, and the shelf 20 remains stationary. It should be noted that when the lifting adjustment begins, the pin plate 40 begins to move outward, and at the same time, the brake lever 52 moves towards the threaded sleeve 51. Only after the brake lever 52 and the threaded sleeve 51 are engaged does the pin plate 40 completely leave the pin groove. Similarly, after the lifting adjustment is completed, the pin plate 40 begins to move towards the pin groove. Only after the pin plate 40 enters the pin groove does the brake lever 52 completely separate from the threaded sleeve 51. That is to say, when the pin plate 40 is located at the opening of the pin groove, the brake lever 52 and the threaded sleeve 51 are in a preliminary engagement state, which can prevent the shelf 20 from losing support and falling.

[0028] Please see Figures 1-3The clutch mechanism 50 also includes a spring 53, with its two ends abutting against the brake lever 52 and the shelf plate 20, respectively. The spring 53 is used to keep the brake lever 52 away from the threaded sleeve 51, while applying a reset torque to the operating mechanism 60, so that the pin plate 40 remains in pin engagement with the frame 10. It should be noted that the surfaces of the pin plate 40 that abut against the frame 10 are provided with anti-slip textures to reduce the possibility of loosening. On the other hand, there is a gap between the pin plate 40 and the pin groove in the vertical direction. When the brake lever 52 leaves the threaded sleeve 51, the shelf plate 20 loses the support of the lead screw 31 and falls. At this time, the pin plate 40 falls on the inner wall of the pin groove, forming an anti-slip texture engagement state. This setting can reduce the resistance of the pin plate 40 inserting into the pin groove.

[0029] Please see Figures 1-3 The operating mechanism 60 includes a double-headed cam 61, which is rotatably connected to the shelf 20. Both ends of the cam 61 abut against the inner ends of the corresponding brake levers 52. When not adjusting, the spring 53 pushes the brake levers 52 towards the cam 61. During adjustment, the cam 61 rotates, pushing the brake levers 52 on both sides outwards, engaging with the threaded sleeve 51. The cam 61 and the tail ends of the brake levers 52 form an over-center locking effect, maintaining the braking effect.

[0030] Please see Figures 1-3 The operating mechanism 60 also includes a rocker arm 62, which is fixedly connected to the cam 61. Connecting rods 63 are hinged to both ends of the rocker arm 62, and each connecting rod 63 is hinged to a corresponding pin plate 40. When the cam 61 rotates, the rocker arm 62 also drives the slide bar and pin plate 40 to retract via the connecting rods 63. One action achieves both unlocking and screwing effects, simplifying the operation.

[0031] Please see Figures 1-3 The operating mechanism 60 also includes a handle 64, which is fixedly connected to the cam 61. The handle 64 has a lever arm to reduce manual effort, and the operator turns the handle 64 to enter the adjustment state.

[0032] Please see Figures 1-3 Rollers 21 are fixedly connected to the frame 10 at each of the four corners of the shelf 20. The shelf 20 is supported by only two lead screws 31 when it is raised or lowered. To ensure smooth raising and lowering, rollers 21 extend vertically from each of the four corners of the shelf 20 to stabilize the posture of the shelf 20 and prevent it from tilting.

[0033] The working principle of this adjustable shelf is as follows: When not in adjustment, spring 53 pushes brake lever 52 toward cam 61, keeping cam 61 in its initial state. At this time, swing arm 62, through connecting rod 63 and slide rod, presses pin plate 40 against pin groove on frame 10. At this time, brake lever 52 is separated from screw sleeve 51. When motor 32 drives lead screw 31 to rotate, it will rotate with screw sleeve 51 without producing lifting or lowering action. Shelf 20 is not affected by lifting mechanism 30. When adjustment is required, manually turn handle 64. Cam 61 pushes brake lever 52 toward screw sleeve 51. At the same time, swing arm 62 pulls pin plate 40 out of pin groove. At this time, the support of shelf 20 changes from frame 10 to lead screw 31, and screw sleeve 51 cannot rotate. When lead screw 31 rotates, the height of the current shelf 20 can be adjusted.

[0034] In summary, in the non-adjustment state, the clutch mechanism 50 keeps the screw sleeve 51 rotating freely, unaffected by the lead screw 31. At this time, the pin plate 40 is inserted into the pin groove to support the shelf 20. In the adjustment state, the pin plate 40 leaves the pin groove, and the clutch mechanism keeps the screw sleeve 51 fixed to the shelf 20. The lead screw 31 of the lifting mechanism 30 can drive the shelf 20 to adjust vertically. The operation of the pin plate 40 and the clutch mechanism 50 is switched by the operating mechanism 60, which simplifies the operation. Each shelf 20 can independently switch the adjustment state, realizing independent lifting and lowering of each shelf 20 under load.

[0035] In this embodiment, the motor 32 is connected to a dedicated button. After turning the handle 64, the button can be used to adjust the height. The locking position of the shelf 20 can be referenced to the distance between the edge of the shelf 20 and the pin groove.

[0036] The above are merely embodiments of this application and are not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, improvements, or equivalent substitutions made within the spirit and principles of this application should be included within the scope of protection of this application. It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

Claims

1. An adjustable layer spacing shelving characterized by, The system includes a frame (10) and a lifting mechanism (30). The frame (10) has several vertically arranged shelves (20). The lifting mechanism (30) includes a lead screw (31) which is rotatably connected to the frame (10). The bottom of each shelf (20) is provided with a pin plate (40), a clutch mechanism (50), and an operating mechanism (60). The clutch mechanism (50) includes a threaded sleeve (51) which is rotatably connected to the shelf (20). The lead screw (31) is threaded through and screwed into all the vertical threaded sleeves (51). The inner wall of the frame (10) has pin grooves that are adapted to the pin plate (40). The pin plate (40) is movably pinned to the frame (10). The operating mechanism (60) is linked with the clutch mechanism (50) and the pin plate (40).

2. An adjustable layer spacing shelving unit according to claim 1, wherein, The lifting mechanism (30) also includes a double-headed motor (32), and bevel gears (33) are fixedly connected to the two output ends of the motor (32) and the lead screw (31), and the pairs of bevel gears (33) mesh with each other.

3. An adjustable layer spacing shelving unit according to claim 2, wherein, The clutch mechanism (50) also includes a brake lever (52), which is slidably connected to the layer plate (20) and abuts against the outer circle of the threaded sleeve (51).

4. An adjustable layer spacing shelving unit according to claim 3, wherein, The clutch mechanism (50) also includes a spring (53), the two ends of which abut against the brake lever (52) and the layer plate (20) respectively.

5. An adjustable layer spacing shelving unit according to claim 4, wherein, The operating mechanism (60) includes a double-headed cam (61), which is rotatably connected to the shelf (20), and the two ends of the cam (61) respectively abut against the inner ends of the corresponding brake rod (52).

6. An adjustable layer spacing shelving unit according to claim 5, wherein, The operating mechanism (60) also includes a swing arm (62), which is fixedly connected to the cam (61). The two ends of the swing arm (62) are respectively hinged to connecting rods (63), and the two connecting rods (63) are respectively hinged to the corresponding pin plates (40).

7. An adjustable layer spacing shelving unit according to claim 6, wherein, The operating mechanism (60) also includes a handle (64), which is fixedly connected to the cam (61).

8. An adjustable layer spacing shelving unit according to claim 7, wherein, Rollers (21) are provided at the four corners of the shelf (20) and are fixedly connected to the frame (10).

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