Obstacle-encountering protection structure of lifting stand column

Abstract

The utility model relates to an obstacle encountering protection structure of a lifting stand column, which comprises a box body, a driving mechanism, a transmission mechanism and a protection structure, the driving mechanism is arranged in the containing cavity and comprises a motor and a reduction gear set connected with the motor and driven by the motor. The transmission mechanism comprises a machine core which is connected with a reduction gear set and driven by the reduction gear set. The protection structure comprises a supporting piece, a force sensor and an elastic piece, the supporting piece is fixed to the box body and formed on the periphery of the motor, the elastic piece is arranged on the supporting piece, and the force sensor is arranged on the elastic piece; when the reduction gear set drives the movement to be blocked, the motor rotates with the movement as the center, the elastic piece deforms, and the change of the elastic piece is sensed through the force sensor. Therefore, the collision damage of the object can be reduced, and the use safety can be improved.

Description

Technical Field

[0001] This application relates to a technology for a rising column, and more particularly to an obstacle protection structure for a rising column. Background Technology

[0002] Lifting columns are commonly used in electric beds, nursing beds, hospital beds, electric lifting tables or chairs for adjusting height or tilt angle. When a user encounters an obstacle during the adjustment process, the user will come into contact with the obstacle and generate an interaction force. This force will be transmitted to the linear actuator. If the lifting column does not stop operating immediately, it will be damaged by the obstacle. If the obstacle is a human body, it will cause injury to the human body.

[0003] To address the aforementioned issues, the industry has incorporated obstacle detection mechanisms into the lifting columns. Currently, the most sensitive obstacle detection mechanisms utilize components capable of converting pressure signals into electrical signals. However, when the deformation at the installation location of the obstacle detection component is small, the resulting deformation stress is insufficient to trigger an obstacle detection alarm. Only after a certain period following the collision between the lifting column and the obstacle can a sufficiently large deformation stress be generated to activate the detection. Furthermore, the existing obstacle detection mechanisms have too slow an obstruction response speed, thus failing to meet current practical application requirements.

[0004] In view of this, the applicant has devoted himself to researching and applying theoretical principles to address the shortcomings of the prior art, and has made every effort to solve the aforementioned problems, which has become the target of the applicant's improvement. Utility Model Content

[0005] One objective of this application is to provide an obstacle protection structure for a lifting column, which can interrupt movement when obstructed during movement, thereby reducing collision damage to objects and improving safety during use.

[0006] To achieve the above objectives, this application provides an obstacle protection structure for a lifting column, comprising a housing, a drive mechanism, a transmission mechanism, and a protection structure. The housing has a cavity; the drive mechanism is disposed in the cavity and includes a motor and a reduction gear set connected to and driven by the motor; the transmission mechanism includes a core mechanism connected to and driven by the reduction gear set; the protection structure includes a support member, a force sensor, and an elastic member. The support member is fixed to the housing and formed around the motor, the elastic member is disposed on the support member, and the force sensor is disposed on the elastic member; wherein when the reduction gear set driving the core mechanism is obstructed, the motor will rotate around the core mechanism, causing the elastic member to deform, and the force sensor will sense the change in the elastic member.

[0007] In one embodiment of the obstacle protection structure of the lifting column described in this application, the protection structure is disposed at the end of the motor away from the reduction gear set.

[0008] In one embodiment of the obstacle protection structure for the lifting column described in this application, the reduction gear set includes a housing, the housing is provided with a rotating member, and the rotating member is provided with a connecting hole for connecting the mechanism.

[0009] In one embodiment of the obstacle protection structure for the lifting column described in this application, the support member includes a block, the box body includes two corresponding side plates, the block is clamped and fixed by the two side plates and is provided with a receiving groove, and the motor is disposed in the receiving groove.

[0010] In one embodiment of the obstacle protection structure for the lifting column described in this application, the block has a first slot and a second slot communicating with the first slot on one side of the receiving groove, the elastic element is embedded in the first slot, and the force sensor is located in the second slot.

[0011] In one embodiment of the obstacle protection structure for the lifting column described in this application, the elastic element is a one-piece rubber pad, and the force sensor is a resistance strain gauge.

[0012] In one embodiment of the obstacle protection structure for the lifting column described in this application, the support member includes a U-shaped frame, which covers the motor and is fixed to the housing. The elastic element is clamped between the U-shaped frame and the motor, and the force sensor is disposed between the U-shaped frame and the elastic element.

[0013] In one embodiment of the obstacle protection structure for the lifting column described in this application, the elastic element is a U-shaped rubber pad formed within the U-shaped frame.

[0014] In one embodiment of the obstacle protection structure for the lifting column described in this application, the force sensor is a conductivity force sensor.

[0015] In one embodiment of the obstacle protection structure for the lifting column described in this application, the support member includes an L-shaped plate, one end of which is fixed to the box body and the other end of which has a notch. The force sensor includes a Hall element and a magnetic body. The elastic member has an embedding groove, in which the Hall element is disposed and the magnetic body is accommodated in the notch.

[0016] In one embodiment of the obstacle protection structure for the lifting column described in this application, the elastic element is a block-shaped rubber pad with a blind groove. The elastic element is fitted onto the L-shaped plate through the blind groove, thereby aligning the Hall element with the magnetic body.

[0017] In one embodiment of the obstacle protection structure for the lifting column described in this application, there are multiple support members, force sensors, and elastic members.

[0018] This application also has the following advantages: it can more accurately determine changes in external force on the lifting column, and its protection accuracy and sensitivity when encountering obstacles are higher. The shape of the strain gauge is not limited, and the installation location of the strain gauge is more flexible. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the first embodiment of this application.

[0020] Figure 2 This is an exploded perspective view of the first embodiment of this application.

[0021] Figure 3 This is a combined cross-sectional view of the first embodiment of this application.

[0022] Figure 4 This is a cross-sectional view of another direction of the first embodiment of this application.

[0023] Figure 5 This is a schematic diagram of the second embodiment of this application.

[0024] Figure 6 This is an exploded view of the second embodiment of this application.

[0025] Figure 7 This is a combined cross-sectional view of the second embodiment of this application.

[0026] Figure 8 This is a cross-sectional view of another direction of the second embodiment of this application.

[0027] Figure 9 This is a schematic diagram of the third embodiment of this application.

[0028] Figure 10 This is an exploded view of the third embodiment of this application.

[0029] Figure 11 This is a combined cross-sectional view of the third embodiment of this application.

[0030] Figure 12 This is a cross-sectional view of another direction of the third embodiment of this application.

[0031] In the attached figures, the following labels are used:

[0032] 1: Lifting column

[0033] 10: Box body

[0034] 11: Base Plate

[0035] 12: Side panel

[0036] 13: Cavity

[0037] 14: Through hole

[0038] 15: Screw hole

[0039] 20: Drive mechanism

[0040] 21: Motor

[0041] 211: Sleeve

[0042] 22: Reduction Gear Set

[0043] 221: Shell

[0044] 222: Rotating component

[0045] 223: Socket

[0046] 30: Transmission mechanism

[0047] 31: Movement

[0048] 32: Fixed base

[0049] 321: Perforation

[0050] 33: Expansion tube

[0051] 34: Screw fasteners

[0052] 40, 40A, 40B: Protective Structure

[0053] 41, 41A, 41B: Support components

[0054] 411: Block

[0055] 412: Receiving slot

[0056] 413: First slot

[0057] 414: Second slot

[0058] 415: Gap

[0059] 42: U-shaped frame

[0060] 421: Screw

[0061] 43: L-shaped plate

[0062] 431: Notch

[0063] 45, 45A, 45B: Force sensors

[0064] 451: Resistance strain gauge

[0065] 452: Conductivity Force Sensor

[0066] 453: Hall element

[0067] 454: Magnetic body

[0068] 47, 47A, 47B: Elastic components

[0069] 471: Sheet rubber pad

[0070] 472: U-shaped rubber pad

[0071] 473: Block rubber pad

[0072] 4731: Blind Slot

[0073] 4732: Embedding slot Detailed Implementation

[0074] The detailed description and technical content of this application are illustrated below with reference to the accompanying drawings. However, the accompanying drawings are provided for reference and illustration only and are not intended to limit this application.

[0075] Please refer to the following first. Figures 1 to 4 As shown, this application provides an obstacle protection structure for a lifting column, which is applied to a lifting column 1, wherein the lifting column 1 mainly includes a housing 10, a drive mechanism 20, a transmission mechanism 30 and a protection structure 40.

[0076] The box body 10 is generally rectangular in shape, and mainly includes a base plate 11 and multiple side plates 12 connected to the base plate 11. A cavity 13 is formed inside the base plate 11 and each side plate 12. In addition, a through hole 14 and multiple screw holes 15 are provided in the base plate 11.

[0077] The drive mechanism 20 is disposed within the cavity 13 of the housing 10, and mainly includes a motor 21 and a reduction gear set 22. The motor 21 is a component capable of forward and reverse rotation, and mainly includes a sleeve 211 and a rotor-stator assembly housed inside the sleeve 211, and other related components (not shown in the figure). The reduction gear set 22 is connected to one end of the motor 21, and mainly includes a housing 221 and a gear set (not shown in the figure) disposed inside the housing 221. The gear set can be a worm gear set or a combination of multiple spur gears, and the gear set is driven by the motor 21 to rotate. A rotating member 222 is provided in the middle of the housing 221, and a sleeve hole 223 is provided at the center of the rotating member 222. In this embodiment, the sleeve hole 223 is a regular hexagon, but is not limited to this shape. The rotating member 222 is connected to the aforementioned gear set and is driven by the gear set, thereby enabling the rotating member 222 to rotate relative to the housing 221.

[0078] The transmission mechanism 30 mainly includes a core 31, a fixed base 32, a telescopic tube 33, multiple screwing elements 34, and other related components. One end of the core 31 passes through the aforementioned through hole 14 and is housed in the sleeve hole 223, while the other end of the core 31 extends into the telescopic tube 33. The fixed base 32 has two through holes 321 and a central hole (not shown in the figure). The central hole is for the aforementioned core 31 to pass through, and each through hole 321 is for each screwing element 34 to pass through and be locked in the screw holes 15 of the aforementioned base plate 11. The drive mechanism 20 is connected to the core 31 only through the sleeve hole 223 of the reduction gear set 22. The motor 21 side is not fixed or locked in any way, so that the drive mechanism 20 can rotate (or sway) horizontally around the core 31, allowing the tail section of the sleeve 211 to rotate (or wobble).

[0079] The protective structure 40 of this embodiment is disposed on the tail section of the sleeve 211 of the motor 21. This protective structure 40 mainly includes a support member 41, a force sensor 45, and an elastic member 47. The support member 41 of this embodiment mainly includes a stepped block 411, which can be made of materials such as rubber and is a deformable component. A receiving groove 412 is provided in the middle part of the block 411 to allow the sleeve 211 of the aforementioned motor 21 to pass through. A first slot 413 and a second slot 414 communicating with the first slot 413 are provided on the side of the receiving groove 412 of the block 411, wherein the height of the first slot 413 is greater than the height of the second slot 414. The block 411 is disposed in the cavity 13 of the aforementioned box 10 and is clamped and fixed by the opposite side plates 12 of the box 10. Force sensor 45 is disposed on elastic member 47, which is embedded in the aforementioned first slot 413. Elastic member 47 is configured adjacent to sleeve 211 of motor 21. Force sensor 45 is disposed in second slot 414 and forms a gap 415 with the wall of second slot 414 of block 411.

[0080] In this embodiment, the force sensor 45 is a resistance strain gauge 451, which is electrically connected to a control device (not shown). When a force is applied to the elastic element 47, the force sensor 45 deforms, causing a change in resistance. The change in resistance is processed by the control device and output as an electrical signal. In this embodiment, the elastic element 47 is a one-piece rubber pad 471.

[0081] When the lifting column 1 encounters an obstacle during its ascent or descent, the rotation of the drive mechanism 31 driven by the reduction gear set 22 will be obstructed. The current of the motor 21 will increase and it will rotate around the mechanism 31. The torque required for the lifting column 1 to operate will increase, which will also increase the pressure applied by the reduction gear set 22 to the support member 41. This pressure is transmitted to the elastic member 47 through the support member 41. The elastic member 47 will deform under the change of pressure. The force sensor 45 will also change with the elastic member 47. The force sensor 45 will generate a corresponding signal and output it under the change of this deformation.

[0082] In this embodiment, a force sensor 45 is installed between the two corresponding side plates 12 of the housing 10 and the sleeve 211 of the motor 21. When the lifting column 1 encounters an obstacle, the motor 21 will detect the change in force or displacement of the tail section of the sleeve 211 due to the reaction torque caused by the change in torque, thus achieving a protective effect against obstacles. The force sensor 45 can detect even slight differences in the torque of the motor 21 immediately. Since the torque of the motor 21 changes first when encountering an obstacle, the detection point of this protective structure 40 acts directly on the sleeve 211 of the motor 21, effectively reducing the reaction time of the lifting column 1 when encountering an obstacle, thereby improving the detection sensitivity.

[0083] See Figures 5 to 8 As shown, the obstacle protection structure of the lifting column of this application can be as described in the above embodiments or as described in this embodiment. The difference is that the protection structure 40A in this embodiment mainly includes a support member 41A, a force sensor 45A, and an elastic member 47A. The support member 41A in this embodiment mainly includes a U-shaped frame 42 and a plurality of screws 421. On both sides of the open end of the U-shaped frame 42, each screw 421 is used to lock it into the screw holes 15 of the aforementioned base plate 11. The force sensor 45A in this embodiment is a conductive force sensor 452. The elastic member 47A in this embodiment is a U-shaped rubber pad 472. The U-shaped rubber pad 472 is sleeved on the tail end of the sleeve 211 of the motor 21 and formed inside the U-shaped frame 42. The conductive force sensor 452 is disposed between the U-shaped frame 42 and the U-shaped rubber pad 472, and is arranged adjacent to the arc edge of the sleeve 211.

[0084] In use, when the lifting column 1 encounters an obstacle during its ascent or descent, the rotation of the drive mechanism 31 driven by the reduction gear set 22 will be obstructed, thereby increasing the current of the motor 21 and causing it to rotate around the mechanism 31. At the same time, the torque required for the lifting column 1 to operate increases, which in turn increases the pressure applied by the reduction gear set 22 to the U-shaped rubber pad 472. This pressure is transmitted through the U-shaped rubber pad 472 to the conductive force sensor 452. The conductive force sensor 452 deforms under pressure, and this change in deformation will generate a corresponding signal and output the signal.

[0085] Please see Figures 9 to 12 As shown, the obstacle protection structure of the lifting column in this embodiment is largely the same as that in the first and second embodiments described above. The difference lies in that: there are two protection structures 40B in this embodiment. Each protection structure 40B mainly includes a support member 41B, a force sensor 45B, and an elastic member 47B. The support member 41B in this embodiment is an L-shaped plate 43. One end of the L-shaped plate 43 can be fixed to the aforementioned base plate 11 by welding and is located at the tail end of the sleeve 211 of the motor 21. The other end of the L-shaped plate 43 is provided with a notch 431. The force sensor 45B in this embodiment mainly includes a Hall element 453 and a magnetic body 454. In this embodiment, the elastic element 47B is a block-shaped rubber pad 473, which has a blind groove 4731 and an embedding groove 4732. The Hall element 453 is disposed in the embedding groove 4732, and the magnetic body 454 is accommodated in the aforementioned recess 431. The block-shaped rubber pad 473 is fitted onto the L-shaped plate 43 through its blind groove 4731, so that the Hall element 453 is arranged corresponding to the magnetic body 454. The magnetic body 454 can be a magnet or a magnetized element.

[0086] When the lifting column 1 encounters an obstacle during its ascent or descent, the rotation of the drive mechanism 31 by the reduction gear set 22 will be obstructed, thereby increasing the current of the motor 21 and causing it to rotate around the mechanism 31. As the torque required for the lifting column 1 to operate increases, the pressure applied by the reduction gear set 22 to each L-shaped plate 43 also increases. This pressure is transmitted to the Hall element 453 through the block rubber pad 473. The Hall element 453 generates a corresponding signal and outputs the signal through the change in the magnetic field strength or magnetic polarity between itself and the magnetic body 454.

[0087] In addition, besides having two protective structures as described in the above embodiment, for some specific specifications of lifting column 1, the protective structure 40B can also be one, and is located at the tail end of the sleeve 211 of the motor 21 (not shown in the figure).

[0088] Of course, there may be other embodiments of this utility model. Without departing from the spirit and essence of this utility model, those skilled in the art can make various corresponding changes and modifications based on this utility model, but these corresponding changes and modifications should all fall within the protection scope of the claims of this utility model.

Claims

1. An obstacle protection structure for a lifting column, characterized in that, include: A box-shaped container with a cavity; A drive mechanism is disposed in the cavity, the drive mechanism including a motor and a reduction gear set connected to and driven by the motor; A transmission mechanism includes a core that is connected to and driven by the reduction gear set; as well as A protective structure includes a support member, a force sensor and an elastic member. The support member is fixed to the housing and formed around the motor. The elastic member is disposed on the support member and the force sensor is disposed on the elastic member. When the reduction gear set drives the mechanism and is obstructed, the motor will rotate around the mechanism, causing the elastic element to deform, and the force sensor will detect the change in the elastic element.

2. The obstacle protection structure for the lifting column as described in claim 1, characterized in that, The protective structure is located at the end of the motor away from the reduction gear set.

3. The obstacle protection structure for the lifting column as described in claim 1, characterized in that, The reduction gear set includes a housing with a rotating component and a connecting hole for connecting the mechanism.

4. The obstacle protection structure for the lifting column as described in claim 1, characterized in that, The support includes a block, which includes two corresponding side plates. The block is clamped and fixed by the two side plates and has a receiving groove, in which the motor is located.

5. The obstacle protection structure for the lifting column as described in claim 4, characterized in that, The block has a first slot and a second slot communicating with the first slot on one side of the receiving groove. The elastic element is embedded in the first slot, and the force sensor is located in the second slot.

6. The obstacle protection structure for the lifting column as described in claim 5, characterized in that, The elastic element is a one-piece rubber pad, and the force sensor is a resistance strain gauge.

7. The obstacle protection structure for the lifting column as described in claim 1, characterized in that, The support includes a U-shaped frame that covers the motor and is fixed to the housing. An elastic element is clamped between the U-shaped frame and the motor. A force sensor is disposed between the U-shaped frame and the elastic element.

8. The obstacle protection structure for the lifting column as described in claim 7, characterized in that, The elastic element is a U-shaped rubber pad, which is formed within the U-shaped frame.

9. The obstacle protection structure for the lifting column as described in claim 7, characterized in that, This force sensor is a conductivity force sensor.

10. The obstacle protection structure for the lifting column as described in claim 1, characterized in that, The support includes an L-shaped plate, one end of which is fixed to the box body and the other end of which has a notch. The force sensor includes a Hall element and a magnetic body. The elastic member has an embedding groove, in which the Hall element is disposed and the magnetic body is accommodated in the notch.

11. The obstacle protection structure for the lifting column as described in claim 10, characterized in that, The elastic element is a block-shaped rubber pad with a blind groove. The elastic element is fitted onto the L-shaped plate through the blind groove, so that the Hall element is configured to correspond to the magnetic body.

12. The obstacle protection structure for the lifting column as described in claim 1, characterized in that, There are multiple support components, force sensors, and elastic components.

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