Arm holding distance adjusting device and shifting machine

Abstract

The utility model discloses a kind of arm holding spacing adjusting device and shifting machine, arm holding includes mounting plate and two opposite and interval and relatively movable arm holding assembly, any arm holding assembly includes sliding plate, any sliding plate is also equipped with a rack section that protrude extends along its sliding direction towards another sliding plate, two rack sections are arranged in parallel and opposite up and down;Arm holding spacing adjusting device further includes gear engaged with two rack sections and driving component connected with gear to drive gear relative to mounting plate rotation and drive two arm holding assembly to move mutually close or mutually far away each other. The mode of rack and pinion cooperation is used, compared with the adjusting structure of positive and negative silk dial wheel in background art, the torque generated by driving component rotation directly acts on gear, transmission efficiency is higher and the adjustment process is simple and smooth, the spacing between two arm holding assemblies can be quickly realized to adapt to the needs of users, can be applied to nursing home, hospital and other occasions needing frequently adjusting arm holding spacing.

Description

Technical Field

[0001] This utility model relates to the field of patient transfer equipment technology, specifically to an arm spacing adjustment device and a transfer machine. Background Technology

[0002] As the population ages, society has an urgent need for medical care and long-term care for the elderly, especially those who are disabled or semi-disabled. Therefore, mobility aids have a large market potential as assistive products for elderly care.

[0003] A patient transfer machine is a tool used to lift patients from chairs, allowing caregivers to push them to the toilet and gently place them on the commode. It can also be used to move patients from chairs to dining chairs or other situations requiring patient transfer. This device typically consists of an electrically powered actuator that drives a robotic arm to lift or lower the patient.

[0004] Due to differences in user body size, most mobile devices on the market have a uniform arm spacing, which fails to allow customers to use the device under the most comfortable conditions. The applicant has previously applied for a transfer machine with adjustable arm spacing, such as the Chinese Patent Publication No. CN222983304U, which discloses an embracing transfer machine and its clamping mechanism. This clamping mechanism uses forward and reverse threaded dials and adjusting blocks to adjust the spacing between the two arms. However, the applicant's research found that the arm spacing adjustment structure of the above-mentioned technical solution has a relatively slow adjustment speed. Therefore, it is necessary to develop a new type of arm spacing adjustment device and transfer machine to solve the above problems. Utility Model Content

[0005] In view of at least one of the above-mentioned technical problems, the purpose of this utility model is to provide a clamping arm spacing adjustment device and a shifting machine.

[0006] The purpose of this utility model is to provide a clamping arm spacing adjustment device, wherein the clamping arm includes a vertical mounting plate and two opposing and spaced clamping arm assemblies disposed on one surface of the mounting plate and capable of relative movement. Each clamping arm assembly includes a sliding plate that is parallel to and slidably connected to the mounting plate. Each sliding plate is further provided with a rack segment that extends protruding toward the other sliding plate along its sliding direction. The two rack segments are arranged vertically parallel and opposite to each other.

[0007] The arm spacing adjustment device further includes a gear disposed on the mounting plate and located in the gap between the two rack segments and meshing with both rack segments, and a drive component connected to the gear to drive the gear to rotate relative to the mounting plate and drive the two arm assemblies to move closer to or further away from each other.

[0008] Preferably, guide rails extending along the sliding direction of the sliding plate are respectively provided at the upper and lower ends of the mounting plate, and the upper and lower sides of any sliding plate are slidably engaged with the guide rails on their corresponding sides.

[0009] Preferably, any of the sliding plates is further provided with a guide section that extends protrudingly toward the rack section on another sliding plate along its sliding direction, and the guide section and the rack section of any of the sliding plates are arranged vertically and horizontally at intervals, and any of the guide sections slides in cooperation with the guide rail on its corresponding side;

[0010] The rack segment of any one of the sliding plates has a side facing away from the rack segment of the other sliding plate and a clearance opening is provided at the guide segment of the other sliding plate.

[0011] When the two sliding plates are driven to move closer to each other, the guide segment of one of the sliding plates is inserted into the clearance opening of the other sliding plate, and the rack segment of either sliding plate is inserted into the gap between the rack segment and the guide segment of the other sliding plate.

[0012] Preferably, the two sliding plates achieve relative movement through manual drive, and the gear is rotatably engaged with the mounting plate via a rotating shaft;

[0013] The driving component includes a driving turntable and a driving rod, the driving rod being coaxially engaged with the rotating shaft.

[0014] Preferably, the outer circumferential surface of the gear is provided with a plurality of second teeth that mesh with the first teeth on the rack segment and two limiting teeth that are centrally symmetrical about the rotation center of the gear.

[0015] When the two sliding plates are at their furthest positions away from each other, the first tooth at the outermost end of the two racks engages with the two limiting teeth respectively.

[0016] Preferably, in the direction of rotation of the gear when the two sliding plates move away from each other, a limiting slope is formed on the side of the second tooth facing forward of any of the limiting teeth, extending obliquely from the outer tip of the limiting tooth to the middle of the side of the second tooth, and the first tooth at the outermost end of any of the rack abuts against the limiting slope to form a limit.

[0017] Preferably, the mounting plate has a raised post on the side facing away from the gear, which is coaxial with the rotating shaft and has one end fixed to the mounting plate. The drive rod is sleeved on the outer periphery of the other end of the raised post, and the other end of the rotating shaft extends beyond the other end of the raised post and is fixedly connected to the drive rod by a locking screw.

[0018] Preferably, the drive rod has a flat hole at the end away from the shim column, and the shaft has a flat groove at the end away from the gear that matches the flat hole for insertion. The flat groove has a locking hole for the locking screw to fix it.

[0019] Preferably, the two sliding plates slide relative to each other electrically, and the gear rotates with the mounting plate via a rotating shaft;

[0020] The driving component is a reversible motor mounted on the side of the mounting plate opposite to the gear, and the output end of the motor is connected to the rotating shaft.

[0021] Another objective of this invention is to provide a transfer machine, including the arm spacing adjustment device described in any of the above-mentioned claims.

[0022] Compared with the prior art, the advantages of this utility model are:

[0023] This utility model discloses a bracket spacing adjustment device that uses a rack and pinion mechanism. Compared with the adjustment structure in the prior art that uses forward and reverse screw wheels, the torque generated by the rotation of the drive component acts directly on the gear, resulting in higher transmission efficiency and a simpler and smoother adjustment process. It can quickly adjust the spacing between the two bracket components to meet the user's needs and is suitable for occasions such as nursing homes and hospitals where frequent adjustment of bracket spacing is required. Attached Figure Description

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0025] Figure 1 This is a schematic diagram of the initial state and front view of the arm spacing adjustment device (driven manually) according to an embodiment of the present utility model.

[0026] Figure 2 This is a schematic diagram of the arm spacing adjustment device (driven manually) in the open state with its front facing forward, according to an embodiment of the present utility model.

[0027] Figure 3 This is a schematic diagram of the initial state of the arm spacing adjustment device (driven manually) according to an embodiment of the present utility model, with the back facing forward.

[0028] Figure 4 for Figure 1 A schematic diagram of the gear structure of the arm spacing adjustment device;

[0029] Figure 5 for Figure 1 A schematic diagram of the rotating shaft of the arm spacing adjustment device;

[0030] Figure 6 for Figure 1 A partial enlarged view of the drive component of the arm spacing adjustment device, which is a cross-sectional view perpendicular to the mounting plate.

[0031] Figure 7 This is a partial enlarged view of the drive component in a cross-sectional view of the arm spacing adjustment device (electrically driven) according to an embodiment of the present utility model, perpendicular to the surface of the mounting plate.

[0032] Figure 8 A three-dimensional structural diagram of a shifting machine (back facing forward) including the arm spacing adjustment device (driven manually) according to an embodiment of the present invention;

[0033] Figure 9 This is a three-dimensional structural diagram of a transfer machine (back side facing forward) that includes the arm spacing adjustment device (driven by electricity) according to an embodiment of the present invention.

[0034] Among them: 10, mounting plate; 20, arm assembly; 21, sliding plate; 211, rack section; 2111, first tooth; 212, guide section; 213, clearance opening; 22, arm component; 30, gear; 31, second tooth; 32, limiting tooth; 321, limiting inclined surface; 40, drive component; 41a, drive turntable; 42a, drive rod; 40b, motor; 50, guide rail; 60, shim column; 70, locking screw; 80, washer; 100, rotating shaft; 110, flat groove; 120, lock hole; 200, swing arm. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this utility model. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of this utility model.

[0036] The transfer machine in this embodiment can be a commercially available embracing transfer machine, and its specific structure is not described or limited. This utility model mainly improves the arm spacing adjustment device of existing embracing transfer machines. Specifically, the arm spacing adjustment device provided in this embodiment can be found in [reference needed]. Figures 1 to 9The system mainly includes a mounting plate 10 and two arm assemblies 20. The mounting plate 10 is a vertically oriented, roughly square plate. Each arm assembly 20 includes a sliding plate 21 parallel to the mounting plate 10 and movably disposed on one side of the mounting plate 10, and an arm support 22 connected to one end of the sliding plate 21, consisting of an internal metal insert (not shown) and an external soft padding (not labeled), for users to rest their arms on and hug. The two sliding plates 21 are movably disposed on the left and right sides of the mounting plate 10, facing each other. This means that the two sliding plates 21 can move closer or further apart to adjust the distance between the two arm supports 22, thus accommodating different users. Each sliding plate 21 includes a rack segment 211 extending protruding towards the other sliding plate 21 along its sliding direction. This rack segment 211 has several spaced first teeth 2111. The two rack segments 211 of the two sliding plates 21 are vertically opposite each other and spaced apart. A gear 30 is rotatably mounted on the mounting plate 10 between the two rack segments 211. The outer circumferential surface of the gear 30 is provided with a plurality of second teeth 31 spaced circumferentially, and both rack segments 211 mesh with the gear 30. It should be noted that this embodiment of the invention does not impose any particular limitation on the size of the gear 30 or the number of second teeth 31; those skilled in the art can select and design according to actual needs. The gear 30 is connected to the drive component 40 and is driven by the drive component 40 to rotate relative to the mounting plate 10, thereby causing the two rack segments 211 meshing with it to translate in the opposite direction and causing the two arm members 22, which are respectively connected to the two sliding plates 21, to move closer or further apart, thus adjusting the arm spacing. Compared to the adjustment structure using forward and reverse screw wheels in the prior art, the torque generated by the rotation of the drive component 40 directly acts on the gear 30, resulting in higher transmission efficiency and a simpler and smoother adjustment process. This allows for quick adjustment of the spacing between the two arm assemblies 20 to meet the user's needs, making it suitable for occasions such as nursing homes and hospitals where frequent adjustment of the arm spacing is required.

[0037] According to some preferred embodiments of this utility model, in order to ensure the straightness and stability of the sliding of any sliding plate 21 relative to the mounting plate 10, a guide rail 50 extending along the sliding direction of the sliding plate 21 is provided on each of the upper and lower sides of the mounting plate 10. The upper and lower sides of the two sliding plates 21 are slidably engaged on the upper and lower guide rails 50. The specific structure of the guide rail 50 is not described, as it is a conventional structure and not an innovation of this utility model.

[0038] For any sliding plate 21, such as Figure 2As shown, in addition to the rack segment 211 mentioned above, there is also a guide segment 212 that is parallel to and spaced apart from the rack segment 211, that is, it extends protruding towards the other slide plate 21 along the sliding direction of the slide plate 21. Each slide plate 21's rack segment 211 has an L-shaped clearance 213 corresponding to the guide segment 212 of the other slide plate 21. This clearance 213 matches the rack segment 211, that is, the side of each rack segment 211 opposite to the side with the first tooth 2111 is parallel to the guide segment 212 of the other slide plate 21. When the two sliding plates 21 are driven to slide closer together, the rack segment 211 of one sliding plate 21 inserts into the clearance opening 213 of the other sliding plate 21, and the rack segment 211 of the other sliding plate 21 inserts into the gap between the rack segment 211 and the guide segment 212. That is, the two guide segments 212 are located outside the two rack segments 211 respectively, and the gap between the two rack segments 211 is smaller than the gap between the guide segment 212 and the rack segment 211 of any sliding plate 21. The guide segment 212 of one sliding plate 21 forms a guide and limit for the rack segment 211 of the other sliding plate 21. Optionally, the outer ends of both the guide segment 212 and the rack segment 211 have a rounded transition structure, that is, they are provided with rounded corners (not shown). Optionally, in this embodiment of the invention, a hypotenuse is provided between the guide segment 212 and the rack segment 211 of any sliding plate 21. This hypotenuse extends upwards at an angle from the rack segment 211 toward the guide segment 212. When the two sliding plates 21 move closer together, the opposite sides of the two rack segments 211 and the two hypotenuses of the two sliding plates 21 together form a parallelogram interval, within which the gear 30 rotates relative to the gear 30.

[0039] In this embodiment of the invention, the gear 30 is rotatably connected to the mounting plate 10 via a rotating shaft 100. For example... Figure 6 and Figure 7 As shown, the axis of the rotating shaft 100 is perpendicular to the surface of the mounting plate 10, and a portion of the rotating shaft 100 extends to the opposite side of the mounting surface of the gear 30. For ease of description, the side on the mounting plate 10 where the gear 30 is mounted is the front, and the other side is the back. Specifically, for the drive component 40, this embodiment of the invention provides two different structures of drive components 40 depending on whether the drive method is manual or electric.

[0040] Specifically, when the driving mode is manual, such as Figures 1 to 6As shown, the driving component 40 of this embodiment includes a driving disc 41a and a driving rod 42a. The driving rod 42a is coaxially connected to the outer periphery of the rotating shaft 100, and the driving disc 41a is located at the end of the driving rod 42a away from the mounting plate 10. By operating the driving disc 41a, torque is applied to the gear 30, and the rotation of the gear 30 is converted into linear movement of the rack segment 211. More specifically, as Figure 5 and Figure 6 As shown, a support post 60 is provided on the side of the mounting plate 10 facing away from the gear 30, i.e., the back side, protruding outward along the axis of the rotating shaft 100. The rotating shaft 100 passes through the support post 60 and partially extends outward from the outer end of the support post 60. The drive rod 42a is sleeved on the outer periphery of the support post 60. One end of the support post 60 is fixed to the mounting plate 10, and the other end is fitted onto the drive rod 42a. The drive rod 42a is an internally hollow tubular rod. Specifically, the rotating shaft 100 extends to the outer end of the support column 60, i.e., the end away from the mounting plate 10, and a flat groove 110 is formed at the outer end of the rotating shaft 100. Correspondingly, a flat hole is opened at the end of the drive rod 42a away from the mounting plate 10, i.e., the end connected to the drive turntable 41a. The flat groove 110 is inserted into the flat hole, and a locking hole 120 is also opened in the middle of the flat groove 110, so as to fix the rotating shaft 100, drive rod 42a, and support column 60 by connecting the locking screw 70 to the locking hole 120. A washer 80 is also provided between the locking screw 70 and the outer end face of the drive rod 42a. Preferably, since manual operation may cause excessive rotation angle, which may cause the rack segment 211 and gear 30 to disengage, a limiting tooth 32 is added to the gear 30 to prevent excessive operation caused by manual operation. The limiting tooth 32 limits the rack position to the maximum position where they are far apart. Specifically, as shown in the figure Figure 4 As shown, the gear 30 has two limiting teeth 32, and the two limiting teeth 32 are designed to be centrally symmetrical about the rotation center of the gear 30. The two limiting teeth 32 respectively cooperate with the two rack segments 211 to limit the maximum position of the mutual movement of the two rack segments 211. Regarding the specific structure of the limiting teeth 32, as follows... Figure 4 As shown, the tooth width of any limiting tooth 32 must be greater than the tooth width of the second tooth 31, and the rotation direction of the gear 30 when it moves relatively away from the two sliding plates 21 is also as shown. Figure 4In the clockwise direction shown, one side of the limiting tooth 32 is specifically the side of the front side in the aforementioned rotational direction, which extends obliquely from the outer tip of the limiting tooth 32 toward the middle of the rear side of the second tooth 31 in front of it and intersects with it. That is, a limiting inclined surface 321 is formed on the front side of the limiting tooth 32. The limiting inclined surface 321 forms an angle (e.g., 60°) with the radial direction of the gear 30, and the limiting inclined surface 321 and the rear side of the second tooth 31 in front of it form a roughly L-shaped limiting groove structure. When the two rack segments 211 move away from each other and move to the maximum position, the first tooth 2111 at the outermost end of any rack segment 211 abuts against the limiting groove structure, specifically hooking the rear side of the second tooth 31 in front of the limiting tooth 32 and the outer tip abutting against the limiting inclined surface 321 of the limiting tooth 32. Since the outer side of the limiting inclined surface 321 is higher and the inner side is lower at this time, the gear 30 can not continue to rotate, and the rack segment 211 can not continue to move. The size and shape of the drive turntable 41a are not limited; for example, such as Figure 3 and Figure 8 As shown, the drive turntable 41a is not a complete disc, but a turntable structure with an arc segment of less than 180° and three straight sides forming an approximate isosceles trapezoid. The drive turntable 41a has a hollow part in the middle (not shown), through which the swing arm 200 of the swing arm assembly passes. Of course, it can also be designed so that the swing arm 200 of the swing arm assembly does not pass through the drive turntable 41a, that is, the drive turntable 41a is designed to be smaller. The specific design is not limited, as long as it does not interfere with the swing arm 200 of the swing arm assembly.

[0041] When the driving method is electric, the driving component 40 in this embodiment of the invention is a motor 40b. Specifically, as shown... Figure 7 and Figure 9As shown, motor 40b is mounted on the side of mounting plate 10 facing away from gear 30, i.e., the back side, and the drive end of motor 40b is connected to rotating shaft 100. In this embodiment of the invention, in order to reduce the size of motor 40b, the output shaft (not shown) of motor 40b is designed to be perpendicular to rotating shaft 100, i.e., the output shaft of motor 40b is in the vertical direction. By automatically driving gear 30 to rotate by motor 40b, the problem of laborious manual rotation is solved. Motor 40b can rotate in both directions to automatically drive the two sliding plates 21 to slide closer or further apart. As for motor 40b, it can be a conventional DC motor 40b. Control switches (not shown) or buttons (not shown) can be directly set on the shifting machine, such as on the swing arm 200 or the handrail (not shown), to realize the automatic driving of the two sliding plates 21 by motor 40b to make relative movements. Alternatively, motor 40b can be driven in both directions by remote control (not shown). In this electric mode, the limiting structure of gear 30 and rack segment 211 is not required. Only the forward and reverse control stroke of motor 40b needs to be set. Of course, the limiting structure is the same as that of the limiting tooth 32 in the manual drive mode. Alternatively, a limiting block (not shown) can be set on the outside of the first tooth 2111 at the outermost end of any rack segment 211. The height of the limiting block is slightly lower than the height of the first tooth 2111. When the first tooth 2111 at the outermost end of the rack segment 211 meshes with gear 30, gear 30 cannot continue to rotate due to the obstruction of the outermost limiting block, thus achieving the limiting.

[0042] Other structures of the arm assembly 20 and other structures of the transfer machine are not described or limited. Please refer to the contents disclosed in the specification of the applicant's previously filed patent application with the patent document number CN222983305U and the patent title "A Foldable Transfer Machine".

[0043] It should be understood that the specific embodiments described above are merely illustrative or explanatory of the principles of this utility model and do not constitute a limitation thereof. Therefore, any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of this utility model should be included within its protection scope. Furthermore, the appended claims are intended to cover all variations and modifications falling within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.

Claims

1. A device for adjusting the spacing of a clamping arm, wherein the clamping arm comprises a vertical mounting plate and two opposing, spaced apart, and relatively movable clamping arm assemblies disposed on one surface of the mounting plate, each of the clamping arm assemblies comprising a sliding plate parallel to and slidably connected to the mounting plate, characterized in that, Each of the sliding plates is further provided with a rack segment that extends protruding toward the other sliding plate along its sliding direction, and the two rack segments are arranged vertically parallel and opposite to each other; The arm spacing adjustment device further includes a gear disposed on the mounting plate and located in the gap between the two rack segments and meshing with both rack segments, and a drive component connected to the gear to drive the gear to rotate relative to the mounting plate and drive the two arm assemblies to move closer to or further away from each other.

2. The arm spacing adjustment device according to claim 1, characterized in that, The mounting plate is provided with guide rails extending along the sliding direction of the sliding plate at its upper and lower ends, and the upper and lower sides of any sliding plate are slidably engaged with the guide rails on their corresponding sides.

3. The arm spacing adjustment device according to claim 2, characterized in that, Each of the sliding plates is further provided with a guide section that extends protrudingly toward the rack section on another sliding plate along its sliding direction. The guide section and the rack section of each sliding plate are arranged vertically and horizontally at intervals, and each guide section slides in cooperation with the guide rail on its corresponding side. The rack segment of any one of the sliding plates has a side facing away from the rack segment of the other sliding plate and a clearance opening is provided at the guide segment of the other sliding plate. When the two sliding plates are driven to move closer to each other, the guide segment of one of the sliding plates is inserted into the clearance opening of the other sliding plate, and the rack segment of either sliding plate is inserted into the gap between the rack segment and the guide segment of the other sliding plate.

4. The arm spacing adjustment device according to any one of claims 1-3, characterized in that, The two sliding plates achieve relative movement through manual drive, and the gear is rotatably engaged with the mounting plate via a rotating shaft; The driving component includes a driving turntable and a driving rod, the driving rod being coaxially engaged with the rotating shaft.

5. The arm spacing adjustment device according to claim 4, characterized in that, The outer circumferential surface of the gear is provided with a plurality of second teeth that mesh with the first teeth on the rack segment and two limiting teeth that are centrally symmetrical about the rotation center of the gear. When the two sliding plates are at their furthest positions away from each other, the first tooth at the outermost end of the two racks engages with the two limiting teeth respectively.

6. The arm spacing adjustment device according to claim 5, characterized in that, In the direction of rotation of the gear when the two sliding plates move away from each other, a limiting slope is formed on the side of the second tooth facing forward of any of the limiting teeth, extending obliquely from the outer tip of the limiting tooth to the middle of the side of the second tooth, and the first tooth at the outermost end of any of the rack abuts against the limiting slope to form a limit.

7. The arm spacing adjustment device according to claim 4, characterized in that, The mounting plate has a raised post on the side facing away from the gear, which is coaxial with the rotating shaft and has one end fixed to the mounting plate. The drive rod is sleeved on the outer periphery of the other end of the raised post, and the other end of the rotating shaft extends beyond the other end of the raised post and is fixedly connected to the drive rod by a locking screw.

8. The arm spacing adjustment device according to claim 7, characterized in that, The drive rod has a flat hole at the end away from the shim column, and the shaft has a flat groove at the end away from the gear that matches the flat hole for insertion. The flat groove has a locking hole for the locking screw to fix it.

9. The arm spacing adjustment device according to any one of claims 1-3, characterized in that, The two sliding plates slide relative to each other electrically, and the gear rotates with the mounting plate via a rotating shaft; The driving component is a reversible motor mounted on the side of the mounting plate opposite to the gear, and the output end of the motor is connected to the rotating shaft.

10. A shifting machine, characterized in that, Includes the arm spacing adjustment device as described in any one of claims 1-9.

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