High-load type lifting stand column

Abstract

The utility model relates to a high-load type lifting stand column. The high-load type lifting stand column comprises a stand column body and a brake mechanism. The stand column body comprises a motor, a telescopic structure and a speed reduction transmission assembly which are connected with one another, the motor comprises a rotating shaft with a head section and a tail section, the telescopic structure comprises a screw, and the rotating shaft drives the screw to rotate through the speed reduction transmission assembly; the brake mechanism comprises at least two brake structures, each brake structure comprises a fixed seat, a brake ring and a spiral spring, and the fixed seat is fixed on the upright post main body corresponding to the head section, the tail section or the screw rod; the brake ring sleeves the head section, the tail section or the screw rod; and the spiral spring is sleeved on the brake ring. Therefore, the braking device has the effect of providing enough braking force and supporting force for the lifting stand column when bearing a high load, and has the effect of additionally arranging a braking structure on the premise that the structure does not need to be changed.

Description

Technical Field

[0001] This application relates to an electric lifting column, and particularly to a high-load lifting column. Background Art

[0002] It is quite common and widespread to apply a lifting column to a display, a workbench or a worktable. Its working principle is that a motor drives a speed reduction transmission component to rotate, and then the speed reduction transmission component drives a screw rod to rotate, and further drives a tube body to extend or retract by the screw rod, so that the lifting column can rise or fall.

[0003] A braking mechanism is also provided inside the existing lifting column to generate braking force after the lifting column rises or falls to a specified position, and provide the support force of the lifting column for the load in a static state.

[0004] However, the weight that a single braking mechanism can bear is limited, resulting in insufficient self-locking force in a static state and being unable to bear a large weight. Therefore, it is difficult to maintain the original set height, which may cause structural damage.

[0005] Therefore, how to provide sufficient braking force and support force (support at the original set height) when the lifting column bears a high load is a major issue that the creator of this application urgently wants to solve. Summary of the Utility Model

[0006] The purpose of this application is to provide a high-load lifting column that can provide sufficient braking force and support force when bearing a high load.

[0007] To achieve the above purpose, this application provides a high-load lifting column, including: a column main body, including a motor, a telescopic structure and a speed reduction transmission component connected between the motor and the telescopic structure. The motor has a rotating shaft, the rotating shaft has a head section and a tail section, the telescopic structure has a screw rod, and the rotating shaft drives the screw rod to rotate through the speed reduction transmission component; and a braking mechanism, including at least two braking structures provided on at least two of the head section, the tail section and the screw rod. Each braking structure includes: a fixed seat fixed to the column main body corresponding to one of the head section, the tail section and the screw rod; a braking ring sleeved on one of the head section, the tail section and the screw rod and having an outer peripheral wall; and a helical spring sleeved on the braking ring and having an inner peripheral wall, and the inner peripheral wall and the outer peripheral wall face each other.

[0008] In one embodiment, the braking structure is provided on the screw rod and further includes a coupling. An actuating rod is formed at the end of the screw rod. The coupling is sleeved on the actuating rod and is driven to rotate by the actuating rod. The braking ring is sleeved on the coupling and is driven to rotate by the coupling. The helical spring is sleeved on the braking ring.

[0009] In one embodiment, the fixed seat is fixed to the column body and has a perforation. The driven rod passes through the perforation and is driven to rotate by a speed reduction transmission assembly. The spiral spring drives the brake ring to rotate in one direction via the driven rod, thereby constricting its own diameter. The spiral spring constricts its own diameter and then frictionally engages and tightly presses against the brake ring between the outer peripheral wall of the brake ring and the inner peripheral wall of the spiral spring to brake the screw brake.

[0010] In one embodiment, the fixed seat has a positioning portion, and one end of the spiral spring has a convex arm, which is positioned by the positioning portion.

[0011] In one embodiment, the brake structure is provided at the tail section of the rotating shaft. The fixed seat correspondingly covers and is fixed to the motor at the tail section. The fixed seat has a blocking body. The brake ring surrounds the tail section within the fixed seat. The brake ring is a non-closed ring and has a notch. The blocking body is located within the notch. The spiral spring is sleeved on the brake ring within the fixed seat. By continuously and elastically constricting the brake ring via the spiral spring, the brake ring is forced to frictionally engage with the rotating shaft to brake the rotating shaft brake.

[0012] In one embodiment, the brake ring includes at least two clutch plates, and the tail section extends between the at least two clutch plates.

[0013] In one embodiment, the brake structure is provided at the head section of the rotating shaft. The fixed seat is disposed within the speed reduction transmission assembly and has a blocking body. The brake ring is a non-closed ring and has a notch. The blocking body is located within the notch. By continuously and elastically constricting the brake ring via the spiral spring, the brake ring is forced to frictionally engage with the rotating shaft to brake the rotating shaft brake.

[0014] In one embodiment, the brake ring includes at least two clutch plates, the head section extends between the at least two clutch plates, and the at least two clutch plates surround each other to form a C shape and have a notch.

[0015] Compared with the prior art, the present application has the following effects: It can add a brake structure without changing the structure of the lifting column, and can provide sufficient braking force and supporting force to the lifting column when bearing high loads, so as to ensure that the lifting column can still maintain the originally set height even after bearing high loads, and the structure will not be damaged due to high loads. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a perspective three-dimensional schematic diagram of the lifting column of the present application when viewed in perspective.

[0017] Figure 2 It is a three-dimensional external view of the present application in which the first brake structure is installed on the driven rod of the telescopic structure.

[0018] Figure 3 According to the present application Figure 2 The three-dimensional exploded schematic diagram of the first brake structure in.

[0019] Figure 4 Cross-sectional schematic diagram according to this application Figure 3

[0020] Figure 5 Partial three-dimensional schematic diagram of the lifting column of this application when the outer shell is omitted

[0021] Figure 6 Three-dimensional exploded schematic diagram of installing the second brake structure on the tail section of the motor shaft in this application

[0022] Figure 7 Cross-sectional schematic diagram according to this application Figure 6

[0023] Figure 8 Cross-sectional schematic diagram of the 8-8 section according to this application Figure 7

[0024] Figure 9 Three-dimensional exploded schematic diagram of installing the third brake structure on the head section of the motor shaft in this application

[0025] Figure 10 Cross-sectional schematic diagram after combination according to this application Figure 9

[0026] Figure 11 Cross-sectional schematic diagram of the 11-11 section according to this application Figure 10

[0027] Explanation of reference numerals:

[0028] 100: Brake mechanism;

[0029] 1: First brake structure;

[0030] 11: First fixing seat;

[0031] 111: Convex body;

[0032] 112: Positioning portion;

[0033] 113: Perforation;

[0034] 12: Coupling;

[0035] 121: Deformed hole;

[0036] 13: First brake ring;

[0037] 131: Outer peripheral wall;

[0038] 14: First helical spring;

[0039] 141: Convex arm;

[0040] 142: Inner peripheral wall;​​​​​

[0041] 2: Second braking structure;

[0042] 21: Second fixing seat;

[0043] 211: Stopper;

[0044] 23: Second braking ring;

[0045] 231: Braking inner peripheral wall;

[0046] 232: Outer peripheral wall;

[0047] 233: Notch;

[0048] 235: Clutch plate;

[0049] 24: Second helical spring;

[0050] 242: Inner peripheral wall;

[0051] 3: Third braking structure;

[0052] 31: Third fixing seat;

[0053] 311: Stopper;

[0054] 313: Perforation;

[0055] 33: Third braking ring;

[0056] 331: Braking inner peripheral wall;

[0057] 332: Outer peripheral wall;

[0058] 333: Notch;

[0059] 335: Clutch plate;

[0060] 34: Third helical spring;

[0061] 342: Inner peripheral wall;

[0062] 600: Column main body;

[0063] 6: Motor;

[0064] 6a: Head end face;

[0065] 6b: Tail end face;

[0066] 61: Rotating shaft;

[0067] 611: Head section;

[0068] 612: Tail section;

[0069] 615: Shaft peripheral wall;

[0070] 7: Reduction drive assembly;

[0071] 71: Limiting part;

[0072] 8: Telescopic structure;

[0073] 81: Screw;

[0074] 811: Driven rod;

[0075] C: Housing. Detailed implementation manner

[0076] The detailed description and technical content of this application are described as follows in conjunction with the accompanying drawings. However, the attached drawings are only for reference and illustration purposes and are not used to limit this application.

[0077] This application provides a high-load lifting column. As Figure 1 shown, the lifting column includes a column main body 600 and a braking mechanism 100. The braking mechanism 100 includes at least two braking structures, that is, the braking structure can be two or more than two. This application does not limit this. In this embodiment, it is described by taking the first braking structure 1, the second braking structure 2 and the third braking structure 3 shown in Figure 9 as an example. In other embodiments that only include two braking structures, the braking mechanism 100 of the lifting column can include any two of the above three braking structures. It should be noted first that each braking structure includes a fixed seat, a braking ring and a spiral spring. The following will describe each braking structure in detail.

[0078] As Figure 1 and with reference to Figure 3 , Figure 6 and Figure 9 shown, the column main body 600 includes a housing C and a motor 6, a reduction drive assembly 7 and a telescopic structure 8 that are all arranged inside the housing C, and the reduction drive assembly 7 is connected between the motor 6 and the telescopic structure 8. The housing C can be a housing connected into a substantially inverted L shape as shown in Figure 1 . The motor 6 has a rotating shaft 61, and the rotating shaft 61 has a head section 611 and a tail section 612 that are opposite to each other; the head section 611 can extend from the head end face 6a of the motor 6 and the tail section 612 can extend from the tail end face 6b of the motor 6. The telescopic structure 8 has a screw 81, and a driven rod 811 is formed at the end of the screw 81. The screw 81 is driven by the reduction drive assembly 7 to rotate. In this way, the rotating shaft 61 drives the reduction drive assembly 7 to rotate, and the reduction drive assembly 7 drives the driven rod 811 together with the screw 81 to rotate, so as to use the forward or reverse rotation of the screw 81 to make the telescopic structure 8 extend or contract.

[0079] As Figures 1 to 5As shown in the figure, first, the first braking structure 1 installed on the aforementioned driven rod 811 will be described. The first braking structure 1 includes a first fixing seat 11, a coupling 12, a first brake ring 13, and a first helical spring 14.

[0080] As Figure 1 shown, the first fixing seat 11 is fixed within the housing C and has a perforation 113. As Figure 3 shown, the hollow coupling 12 is sleeved on the driven rod 811 and can be driven to rotate by the driven rod 811. The driving can be achieved, for example, by using corresponding deformation rods and deformation holes 121; the first brake ring 13 is sleeved on the coupling 12 and can be driven to rotate by the coupling 12. The driving can be achieved, for example, by using corresponding inner and outer ratchet teeth. The first brake ring 13 has an outer peripheral wall 131; the first helical spring 14 is sleeved on the first brake ring 13 and has an inner peripheral wall 142, such that the inner peripheral wall 142 and the outer peripheral wall 131 are Figure 4 facing each other as shown in the figure. The driven rod 811 passes through the perforation 113 of the first fixing seat 11 and then extends into the speed reduction transmission assembly 7 to be driven to rotate by the speed reduction transmission assembly 7.

[0081] Thus, as Figures 3 to 5 shown, when the lifting column of the present application is working (whether rising or falling), the motor 6 drives the speed reduction transmission assembly 7 to rotate, causing the driven rod 811 to rotate in a certain direction. At the same time, the first brake ring 13 will also be driven by the driven rod 811 to rotate in the same direction. At this time, the first helical spring 14 (due to the force in the same direction as its own helix direction) can utilize the frictional force formed between the outer peripheral wall 131 and the inner peripheral wall 142 to contract its own diameter. After the diameter of the first helical spring 14 contracts, its inner peripheral wall 142 tightly presses against the outer peripheral wall 131 of the first brake ring 13, forcing the first brake ring 13, together with the coupling 12 and the screw rod 81, to be braked, that is, braking the screw rod 81 to achieve braking of the screw rod 81.

[0082] Preferably, the first fixing seat 11 has a positioning portion 112, and one end of the first helical spring 14 has a convex arm 141. The convex arm 141 is positioned by the positioning portion 112, which is more conducive to the first helical spring 14 contracting its own diameter due to the aforementioned frictional force. In addition, as shown in the figure, the first fixing seat 11 protrudes with a convex body 111. The aforementioned positioning portion 112 can be a jack formed in the convex body 111 (refer to Figure 4 the figure shown). The aforementioned convex arm 141 is positioned by being inserted into the positioning portion 112.

[0083] As Figures 6 to 8 shown, next, the second braking structure 2 installed on the tail section 612 of the aforementioned rotating shaft 61 will be described. The second braking structure 2 includes a second fixing seat 21, a second brake ring 23, and a second helical spring 24.

[0084] The second fixing seat 21 can be in the shape of a cover to cover and fix on the tail end surface 6b. The second fixing seat 21 protrudes with a stopper 211 as shown in Figure 6 and Figure 8 shown. The second brake ring 23 and the second helical spring 24 are both covered inside the second fixing seat 21. The second brake ring 23 surrounds the tail section 612 and is a non-closed ring, forming a notch 233 as shown in Figure 8 shown. The stopper 211 is located inside the notch 233 (to prevent the second brake ring 23 from rotating with the rotating shaft 61). The second helical spring 24 is sleeved on the second brake ring 23, so that the inner peripheral wall 242 of the second helical spring 24 and the outer peripheral wall 232 of the second brake ring 23 can face each other as shown in Figure 7 shown, and the second helical spring 24 continuously elastically tightens the outer peripheral wall 232 of the second brake ring 23 with its inner peripheral wall 242. It should be noted that still as shown in Figure 7 shown, the rotating shaft 61 has a shaft peripheral wall 615, the second brake ring 23 has a brake inner peripheral wall 231 that is internally and externally opposite to the outer peripheral wall 232, and the brake inner peripheral wall 231 and the shaft peripheral wall 615 face each other.

[0085] Thus, as shown in Figures 6 to 8 shown, when the motor 6 drives the rotating shaft 61 to rotate in any direction, the second helical spring 24 continuously elastically tightens the second brake ring 23, so as to force the second brake ring 23 to friction against the shaft peripheral wall 615 of the rotating shaft 61 with its brake inner peripheral wall 231, thereby braking the rotating shaft 61.

[0086] It should be noted that the second brake ring 23 can be in a form including at least two clutch plates 235. In this embodiment, three clutch plates 235 and surrounding each other are taken as an example for description, and can surround to form a non-closed C shape as shown in Figure 8 shown to form the aforementioned notch 233. As for the tail section 612 of the rotating shaft 61, it extends between all the clutch plates 235, and the tail section 612 is surrounded by all the clutch plates 235. The second helical spring 24 also continuously elastically tightens all the clutch plates 235 of the second brake ring 23, so it can also brake the rotating shaft 61.

[0087] As shown in Figures 9 to 11 shown, finally, the third braking structure 3 installed on the head section 611 of the aforementioned rotating shaft 61 is described. The third braking structure 3 includes a third fixing seat 31, a third brake ring 33, and a third helical spring 34.

[0088] The third fixing seat 31 is fixed inside the speed reduction transmission assembly 7 and has a stopper 311. The third fixing seat 31 can be as shown in Figure 9It is shown as a rectangular plate-like shape, but the present application does not limit this. The third fixing seat 31 also has a through hole 313 for the head section 611 to pass through. Specifically, the reduction drive assembly 7 has a limiting portion 71, and the limiting portion 71 has a shape corresponding to that of the third fixing seat 31. Therefore, when the third fixing seat 31 is disposed within the limiting portion 71, the third fixing seat 31 will be restricted by the limiting portion 71 and cannot rotate.

[0089] The third brake ring 33 is sleeved on the head section 611, so that the third fixing seat 31 is clamped between the third brake ring 33 and the head end face 6a, and the braking inner peripheral wall 331 of the third brake ring 33 can face the aforementioned shaft peripheral wall 615 of the rotating shaft 61 face to face; it should be noted that the third brake ring 33 is a non-closed ring (such as a C-shaped ring) and has a notch 333, and the aforementioned stopper 311 is located within the notch 333 (to prevent the third brake ring 33 from rotating with the rotating shaft 61). The third helical spring 34 is sleeved on the third brake ring 33, so that the inner peripheral wall 342 of the third helical spring 34 faces the outer peripheral wall 332 of the third brake ring 33 face to face, and the third helical spring 34 continuously elastically tightens the outer peripheral wall 332 of the third brake ring 33 with its inner peripheral wall 342.

[0090] Thus, as Figures 9 to 11 shown, when the motor 6 drives the rotating shaft 61 to rotate in any direction, the third helical spring 34 continuously elastically tightens the third brake ring 33, so as to force the third brake ring 33 to friction the shaft peripheral wall 615 of the rotating shaft 61 with its braking inner peripheral wall 331, thereby braking the rotating shaft 61.

[0091] It should be noted that the third brake ring 33 can also be in a form including at least two clutch plates 335. In this embodiment, three clutch plates 335 and surrounding each other are taken as an example for description, and can be surrounded into a non-closed C shape as Figure 11 shown to form the aforementioned notch 333. As for the head section 611 of the rotating shaft 61, it extends between all the clutch plates 335, and the head section 611 is surrounded by all the clutch plates 335. The third helical spring 34 also continuously elastically tightens all the clutch plates 335 of the third brake ring 33, so that the rotating shaft 61 can also be braked.

[0092] Therefore, when the lifting column of the present application has at least any two braking structures, such as having a first braking structure 1 and a second braking structure 2, or a first braking structure 1 and a third braking structure 3, etc., it can provide sufficient braking (or: braking force, supporting force) when bearing high loads, so that the lifting column can be maintained at the originally set height. Therefore, there is an effect that the structure will not be damaged due to high loads. Moreover, the first, second, and third braking structures 1, 2, and 3 also have the effect of not affecting the existing structural space (for example, because the first, second, and third braking structures 1, 2, and 3 can be directly installed on the existing structure) and the effect of adding a braking structure without changing the structure of the lifting column. Of course, when the lifting column of the present application can have three braking structures at the same time, its braking mechanism 100 can provide more sufficient braking (or: braking force, supporting force) for the device. Among them, the supporting force can keep the lifting column supported at the originally set height.

[0093] In summary, the high-load type lifting column of the present application can indeed achieve the expected use purposes and effects, and can solve the deficiencies of the prior art. Therefore, a patent application is filed.

[0094] The above are only the preferred and feasible embodiments of the present application, and do not limit the scope of the claims of the present application. Any equivalent structural changes made by using the content of the specification and drawings of the present application shall be equally included in the scope of the claims of the present application. This is hereby stated.

Claims

1. A high-load lifting column, characterized in that: include: The column body comprises a motor, a telescopic structure and a reduction transmission assembly connected between the motor and the telescopic structure, wherein the motor has a rotating shaft, the rotating shaft has a head section and a tail section, the telescopic structure has a screw, and the rotating shaft drives the screw to rotate via the reduction transmission assembly; and The brake mechanism comprises at least two brake structures disposed on at least two of the head section, the tail section and the screw, each of the brake structures comprising: A fixing seat, corresponding to one of the head section, the tail section and the screw, fixed to the column body; a brake ring, which is sleeved on one of the head section, the tail section and the screw and has an outer peripheral wall; and The coil spring is sleeved on the brake ring and has an inner peripheral wall, wherein the inner peripheral wall and the outer peripheral wall face each other.

2. The high-load lifting column according to claim 1, characterized in that: The brake structure is arranged on the screw rod and also includes a coupling. The end of the screw rod forms a driven rod. The coupling is sleeved on the driven rod and is driven to rotate by the driven rod. The brake ring is sleeved on the coupling and is driven to rotate by the coupling. The spiral spring is sleeved on the brake ring.

3. The high-load lifting column according to claim 2, characterized in that: The fixing seat is fixed to the column body and has a through hole, the driven rod passes through the through hole and is driven to rotate by the reduction transmission component, the coil spring drives the brake ring to rotate in one direction via the driven rod to narrow its own caliber, and the coil spring rubs between the outer circumferential wall of the brake ring and the inner circumferential wall of the coil spring to press the brake ring to brake the screw brake.

4. The high-load lifting column according to claim 3, characterized in that: The fixing seat has a positioning portion, and one end of the coil spring has a protruding arm, and the protruding arm is positioned by the positioning portion.

5. The high-load lifting column according to claim 1, characterized in that: The brake structure is arranged at the tail section of the rotating shaft, the fixed seat corresponds to the tail section cover and is fixed to the motor, the fixed seat has a baffle, the brake ring surrounds the tail section in the fixed seat, the brake ring is a non-closed ring and has a gap, the baffle is located in the gap, the coil spring is sleeved on the brake ring in the fixed seat, and the coil spring continuously elastically tightens the brake ring to force the brake ring to rub against the rotating shaft to brake the rotating shaft.

6. The high-load lifting column according to claim 5, characterized in that: The brake ring comprises at least two clutch plates, and the tail section extends between the at least two clutch plates.

7. The high-load lifting column according to claim 1, characterized in that: The brake structure is arranged at the head section of the rotating shaft, the fixed seat is arranged in the reduction transmission assembly and has a baffle, the brake ring is a non-closed ring and has a gap, the baffle is located in the gap, and the brake ring is continuously elastically tightened by the coil spring to force the brake ring to rub against the rotating shaft to brake the rotating shaft.

8. The high-load lifting column according to claim 7, characterized in that: The brake ring comprises at least two clutch plates, the head section extends between the at least two clutch plates, and the at least two clutch plates surround each other in a C shape to form the notch.

Images