Shock-absorbing device for stretcher trolleys in ambulances

Abstract

The present invention discloses a stretcher trolley shock absorbing device that can be used for an ambulance, which belongs to an active shock absorbing device, including a wheel-leg shock absorbing unit and a frame shock absorbing unit. The wheel-leg shock absorbing unit has a wheel-leg support frame, which is movably mounted on a wheel-leg support seat, and an electromagnet damping is also arranged inside the wheel-leg support frame, and a shock absorbing spring body and other structures are arranged in the middle of the electromagnet damping. By designing the wheel-leg shock absorbing unit and the frame shock absorbing unit, shock absorption can be achieved synchronously from multiple positions of the stretcher trolley, and the damping spring body and the electromagnet damping with adjustable damping are used to match vibrations of different sizes and frequencies, and combined with a magnetic suspension sliding platform, small-range activities and shock absorption can be performed in the three-axis directions of XYZ, so that the frame and the stretcher can absorb more bumps and vibrations, thereby solving the disadvantage of poor shock absorption of traditional stretcher trolleys.

Description

Technical Field

[0001] The present invention relates to an active shock absorbing device, and more specifically, the present invention mainly relates to a shock absorbing device for a stretcher vehicle which can be used for an ambulance. Background Art

[0002] Stretchers are essential rescue facilities on ambulances. They are mainly used to transport the wounded over short distances. However, the stretchers on the market generally have a single structure and poor shock absorption effect. They are obviously bumpy during the transportation of the wounded, lack comfort, and are likely to affect the timing of treatment for some critically injured patients. The reason for the obvious vibration of such stretcher trolleys is that they basically only use rubber damping parts as shock absorption facilities, which is passive shock absorption. The shock absorption effect is affected by objective factors such as vibration frequency, size, and user operation, resulting in unstable shock absorption effect. Therefore, it is necessary to further study and improve the shock absorption system of such stretcher trolleys. Summary of the invention

[0003] One of the purposes of the present invention is to provide a shock absorbing device for a stretcher trolley that can be used in an ambulance in view of the above-mentioned shortcomings, in order to solve the technical problems in the prior art that similar stretcher trolleys have a single structure, poor shock absorbing performance, insufficient comfort in use, and easily affect the timing of treatment of critically injured patients.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions.

[0005] The present invention provides a shock absorbing device for a stretcher vehicle that can be used for an ambulance, the device comprising a wheel-leg shock absorbing unit and a vehicle frame shock absorbing unit; the wheel-leg shock absorbing unit comprises a wheel-leg support frame, the wheel-leg support frame is movably mounted on a wheel-leg support seat, an electromagnet damping is also arranged inside the wheel-leg support frame, a shock absorbing spring body is arranged in the middle of the electromagnet damping, one end of the shock absorbing spring body abuts against the upper part of the wheel-leg support seat, and the other end is fixed on a lifting platform, the lifting platform is connected to the adjusting gear through an adjusting rack, the adjusting gear is connected to the adjusting electromagnet The adjusting motor and the electromagnet damping are both connected to the attitude control board, and the attitude control board is used to adjust the damping value of the electromagnet damping through the signal fed back by the vibration sensor and / or the gyroscope, and control the start and stop and the forward and reverse rotation state of the adjusting motor; the frame shock absorbing unit includes a shock absorbing bracket, which is installed on a shock absorbing support, and a plurality of shock absorbing springs and a magnetic levitation sliding platform are arranged between the shock absorbing bracket and the shock absorbing support, and the magnetic levitation sliding platform is placed in the middle of the plurality of shock absorbing springs, and the magnetic levitation sliding platform is a magnetic oil seal structure.

[0006] Preferably, a further technical solution is: the wheel leg support frame is used to be installed on the frame of the stretcher trolley, and the wheel leg support seat is used to be installed on the wheel leg of the stretcher trolley.

[0007] A further technical solution is: the shock-absorbing bracket is used to be installed on the stretcher of the stretcher trolley, and the shock-absorbing support is used to be installed on the frame of the stretcher trolley.

[0008] A further technical solution is: the device also includes a spring shock-absorbing wheel, a plurality of wheel springs are installed between the wheel hub and the shaft tube of the spring shock-absorbing wheel, and the spring shock-absorbing wheel is used to be installed at the lower end of the wheel leg of the stretcher.

[0009] A further technical solution is: the electromagnet damper is cylindrical, and the upper and lower parts of the electromagnet damper respectively abut against the upper wall and lower wall of the internal cavity of the wheel leg support frame; the upper part of the wheel leg support frame has a fork-joined part, and the lower part of the wheel leg support seat has a fixed part, the fork-joined part of the wheel leg support frame is provided with a fixing hole corresponding to the frame of the stretcher trolley, and the fixed part of the wheel leg support seat is provided with a fixing hole corresponding to the wheel leg of the stretcher trolley.

[0010] A further technical solution is: the gyroscope, the vibration sensor and the attitude control board are all installed on the frame of the stretcher trolley, and a power supply unit is also installed on the frame of the stretcher trolley, and the attitude control board is connected to the power supply unit.

[0011] A further technical solution is: the upper part of the shock absorbing bracket and the lower part of the shock absorbing support are each provided with a respective fork-joint portion, the fork-joint portion of the upper part of the shock absorbing bracket is provided with a fixing hole corresponding to the stretcher, and the fork-joint portion of the lower part of the shock absorbing support is provided with a fixing hole corresponding to the frame.

[0012] A further technical solution is: the electromagnet damping includes an energized solenoid, a silicon steel core tube is provided inside the energized solenoid, a movable aluminum column is provided inside the silicon steel core tube, the energized solenoid is connected to the attitude control board through a power line, and the movable aluminum column is connected to the attitude control board through a signal line.

[0013] Compared with the prior art, one of the beneficial effects of the present invention is that by designing the wheel-leg shock-absorbing unit and the frame shock-absorbing unit, shock absorption can be achieved synchronously from multiple positions of the stretcher, and the damping spring body with adjustable damping and the electromagnet damping are used to match vibrations of different sizes and frequencies. In combination with the magnetic suspension sliding platform, small-scale activities and shock absorption can be performed in the three-axis directions of XYZ, so that the frame and the stretcher can absorb more bumps and vibrations, solving the shortcomings of poor shock absorption of traditional stretcher. At the same time, the present invention provides a stretcher shock-absorbing device that can be used for ambulances, which has a simple structure, is suitable for installation on stretchers of various specifications, and has a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic structural diagram for describing an embodiment of the present invention.

[0015] Figure 2 The figure is a diagram of an installation state for explaining an embodiment of the present invention.

[0016] FIG. 3 is a schematic diagram for illustrating the structure of a wheel-leg shock absorbing unit in one embodiment of the present invention.

[0017] Figure 4 It is a schematic diagram for explaining the adjustment structure of the shock absorbing spring body in one embodiment of the present invention.

[0018] Figure 5 It is a schematic diagram for illustrating the electromagnet damping structure in one embodiment of the present invention.

[0019] Figure 6 It is a schematic diagram for explaining the structure of a frame shock absorbing unit in one embodiment of the present invention.

[0020] Figure 7 for Figure 6 Schematic diagram of the lateral structure.

[0021] Figure 8 It is a schematic diagram for explaining the structure of a spring shock-absorbing wheel in one embodiment of the present invention.

[0022] In the figure, 1 is a wheel leg shock absorbing unit, 11 is a wheel leg support frame, 12 is a wheel leg support seat, 13 is an electromagnet damping, 131 is an energized solenoid, 132 is a silicon steel electric core tube, 133 is a movable aluminum column, 14 is a shock absorbing spring body, 15 is a lifting platform, 151 is an adjustment rack, 16 is an adjustment gear, 17 is a posture control board, 2 is a frame shock absorbing unit, 21 is a shock absorbing bracket, 22 is a shock absorbing support, 23 is a shock absorbing spring, 24 is a magnetic levitation sliding platform, 3 is a frame, 4 is a wheel leg, 5 is a stretcher, 6 is a spring shock absorbing wheel, 61 is a wheel hub, 62 is a shaft sleeve, 63 is a wheel spring, 7 is a fixing hole, 8 is a signal line, 9 is a power supply line, and 10 is a power supply unit. DETAILED DESCRIPTION

[0023] The present invention will be further described below in conjunction with the accompanying drawings.

[0024] refer to Figure 1 As shown, one embodiment of the present invention is a stretcher shock absorbing device that can be used in an ambulance. The device is a combination device designed specifically for the parts of the stretcher that are prone to vibration when in use. The device includes a wheel leg shock absorbing unit 1 and a frame shock absorbing unit 2. Figure 2 As shown, the wheel-leg shock-absorbing unit 1 is installed between the frame 3 and the wheel leg 4 of the stretcher when the device is in use, and the frame shock-absorbing unit 2 is installed between the stretcher 5 and the frame 3 when the device is in use. The two cooperate with each other to achieve an all-round shock-absorbing effect on the stretcher.

[0025] Specifically, as shown in FIG3 , the wheel-leg shock absorbing unit 1 is a combined structure, which includes a hollow wheel-leg support frame 11, and the wheel-leg support frame 11 is movably mounted on a wheel-leg support seat 12, and the two cooperate with each other, and the wheel-leg support frame 11 is also provided with an electromagnet damper 13 inside, and the electromagnet damper 13 is also a hollow structure. A shock absorbing spring body 14 is provided in the middle of the electromagnet damper 13, and the shock absorbing spring body 14 is a spring body with adjustable feedback force, such as Figure 4 As shown, one end of the shock-absorbing spring body 14 is abutted against the upper part of the wheel leg support seat 12, and the other end of the shock-absorbing spring body 14 is fixed on the lifting platform 15. More importantly, the lifting platform 15 is also meshed with the adjusting gear 16 through the adjusting rack 151, and the adjusting gear 16 is connected to the adjusting motor power, so that when the motor is adjusted to rotate forward and reverse and start and stop, the compression degree of the shock-absorbing spring body 14 can be adjusted by adjusting the gear 16 and the adjusting rack 151, and then its feedback force can be adjusted to match different shock-absorbing requirements. In addition, for the convenience of adjustment, the aforementioned adjustment motor and the electromagnet damping 13 can be connected to the attitude control board 17, and the attitude control board 17 has a control module. The control module can adjust the damping value of the electromagnet damping 13 through the rectifier module through the vibration sensor and gyroscope feedback signals installed on the frame 3, and control the start and stop and forward and reverse states of the adjustment motor to adjust the feedback force of the shock-absorbing spring body 14.

[0026] Preferably, the electromagnet damper 13 can be designed to be cylindrical, and the upper and lower parts of the electromagnet damper 13 respectively contact the upper wall and lower wall of the inner cavity of the wheel leg support frame 11; and the electromagnet damper 13 can refer to the electromagnet damping principle in the prior art, and the damping value of the electromagnet damper 13 can be adjusted by changing the magnitude of the current, for example Figure 5 As shown, the electromagnet damping 13 in this embodiment includes an energized solenoid 131, a silicon steel electric core tube 132 is provided inside the energized solenoid 131, and a movable aluminum column 133 is provided inside the silicon steel electric core tube 132. The energized solenoid 131 is connected to the attitude control board 17 through a power line, and the movable aluminum column 133 is connected to the attitude control board 17 through a signal line, thereby forming a closed-loop control feedback and current regulation, and then adjusting the damping value of the electromagnet damping 13 in the aforementioned manner.

[0027] On the other hand, reference Figure 6 and Figure 7As shown, the frame shock absorbing unit 2 includes a shock absorbing bracket 21, which is mounted on a shock absorbing support 22. A plurality of shock absorbing springs 23 and a magnetic suspension sliding platform 24 are arranged between the shock absorbing bracket 21 and the shock absorbing support 22. The magnetic suspension sliding platform 24 is placed in the middle of the plurality of shock absorbing springs 23, and the magnetic suspension sliding platform 24 is a magnetic oil seal structure. By utilizing the suspension characteristics of the magnetic oil seal, the magnetic suspension sliding platform 24 can provide a low-resistance activity space, and the shock absorbing spring can play a role in limiting and shock absorbing, so that the entire device can run smoothly on the horizontal plane, reducing the rubbing of the stretcher on the horizontal plane. Since the magnetic oil seal structure is a common suspension bearing oil seal technology, it will not be described in detail here.

[0028] Based on the structure of the wheel-leg shock absorbing unit 1 and the frame shock absorbing unit 2 described in this embodiment, when the device is in use, the wheel-leg support frame 11 can be installed on the frame 3 of the stretcher, and the wheel-leg support seat 12 can be installed on the wheel leg 4 of the stretcher. The shock absorbing bracket 21 is installed on the stretcher 5 of the stretcher, and the shock absorbing support seat 22 is installed on the frame 3 of the stretcher. In this embodiment, by designing the wheel-leg shock absorbing unit 1 and the frame shock absorbing unit 2, shock absorption can be achieved synchronously from multiple positions of the stretcher, and the damping spring body 14 with adjustable damping and the electromagnet damping 13 are used to match vibrations of different sizes and frequencies. In combination with the magnetic suspension sliding platform 24, small-scale activities and shock absorption can be performed in the three-axis directions of XYZ, so that the frame 3 and the stretcher 5 can absorb more bumps and vibrations, solving the shortcomings of poor shock absorption effect of traditional stretcher.

[0029] Furthermore, in order to facilitate the installation of the wheel-leg shock-absorbing unit 1 and the frame shock-absorbing unit 2 on the stretcher, a fork joint can be designed on the upper part of the wheel-leg support frame 11 in the wheel-leg shock-absorbing unit 1, and a fixed part can be designed on the lower part of the wheel-leg support seat 12. Then, a fixing hole 7 corresponding to the frame of the stretcher is designed on the fork joint of the wheel-leg support frame 11, and a fixing hole 7 corresponding to the wheel leg of the stretcher is also designed on the fixed part of the wheel-leg support seat 12. Based on the same idea, a fork joint can be designed on the upper part of the shock-absorbing bracket 21 and the lower part of the shock-absorbing support seat 22 in the frame shock-absorbing unit 2. Then, a fixing hole 7 corresponding to the stretcher 5 is designed on the fork joint of the upper part of the shock-absorbing bracket 21, and a fixing hole 7 corresponding to the frame 3 is designed on the fork joint of the lower part of the shock-absorbing support seat 22. The fixing holes 7 can be installed and fixed by anti-slip screws, which can be realized by using silicone washers, which will not be described in detail here.

[0030] refer to Figure 8 and Figure 2 As shown, in a more preferred embodiment of the present invention for solving the technical problem, a spring damping wheel 6 can be further provided in the device, that is, the spring damping wheel 6 is used as the running wheel of the stretcher, and a plurality of wheel springs 63 are installed between the wheel hub 61 of the spring damping wheel and the shaft sleeve 62, as shown in FIG. Figure 8The spring shock-absorbing wheel 6 directly absorbs large vibrations during walking, so as to avoid the stretcher trolley's overall vibration amplitude being too large to burden the wheel-leg shock-absorbing unit 1 and the frame shock-absorbing unit 2. That is, in this embodiment, the large vibrations during the stretcher trolley's walking are absorbed by the spring shock-absorbing wheel 6, and the small vibrations are absorbed by the wheel-leg shock-absorbing unit 1 and the frame shock-absorbing unit 2 in coordination, thereby comprehensively processing and absorbing the vibrations during the stretcher trolley's walking, and achieving a better shock-absorbing effect.

[0031] Furthermore, in order to assist in achieving the active shock absorption effect of the device, the above-mentioned gyroscope, vibration sensor and posture control board 17 can be installed on the frame 3 of the stretcher trolley. The installation position can be determined according to the structure of the stretcher trolley itself, and a power supply unit needs to be installed on the frame 3 of the stretcher trolley. The power supply unit can use a battery or a solar photovoltaic panel. The above-mentioned posture control board 17 is connected to the power supply unit, and then the gyroscope, vibration sensor, electromagnet damping 13 and the adjustment motor are all connected to the power supply. The above-mentioned gyroscope and vibration sensor belong to the signal acquisition module. The two can be installed separately or simultaneously when in use, which can be determined according to the actual active shock absorption requirements.

[0032] refer to Figures 1 to 8 As shown, in actual use of the preferred embodiment of the present invention, the forked parts of the shock absorbing bracket 21 and the shock absorbing support 22 of the frame shock absorbing unit 2 are fixed to the support beams of the stretcher 5 and the frame 3, respectively, the forked part of the upper part of the wheel leg support frame 11 of the wheel leg shock absorbing unit 1 is fixed to the frame 3, and the fixed part of the wheel leg support seat 12 is fixed to the upper end of the wheel leg 4. During the process of pushing the stretcher, the vibration caused by the unevenness of the road surface is directly absorbed by the spring shock absorbing wheel 6, while the small vibration caused by the inertia of the stretcher and the absorption of the spring shock absorbing wheel 6 is handled by the wheel leg shock absorbing unit 1 and the frame shock absorbing unit 2.

[0033] Specifically, in the wheel-leg shock-absorbing unit 1, the vibration sensor and gyroscope on the frame 3 first collect the current vibration frequency and amplitude signals, and transmit them to the control module in the attitude control board 17. The control module controls the start and stop and forward and reverse rotation of the motor according to the preset program, thereby adjusting the up and down real-time position of the lifting platform 15, and then compressing or stretching the shock-absorbing spring body 14, so as to adjust the spring shock-absorbing wheel to form different feedback forces. At the same time, the control module adjusts the current size of the electromagnet damping 13, and then adjusts the current damping value of the electromagnet damping 13, and matches and alleviates the longitudinal X-axis vibration generated by the current push of the stretcher by the changes of the above two values.

[0034] In the frame shock absorbing unit 2, through the shock absorbing spring 23 and the magnetic levitation sliding platform 24 between the frame 3 and the stretcher 5, the buffering force of the shock absorbing spring 23 and the repulsion of the same poles of the two high-strength neodymium magnets of the magnetic levitation sliding platform 24 are utilized to provide support to each other, and the oil liquid seal in the middle ensures that the entire platform moves smoothly along the horizontal YZ axis direction. At the same time, the oil seal structure can also absorb certain tiny vibrations.

[0035] As mentioned above, the present invention provides effective shock absorption for the stretcher from three parts: tire, frame and stretcher, especially actively adjusting the hardness of the electromagnet damping 13 and the shock absorbing spring body 14 to perform active shock absorption, and cooperates with the frame shock absorbing unit 2 and the spring shock absorbing wheel 6 to adapt to different road surfaces and environments, providing a comfortable feeling for the injured.

[0036] In addition to the above, it should be noted that "one embodiment", "another embodiment", "embodiment", etc. mentioned in this specification refer to the specific features, structures or characteristics described in conjunction with the embodiment included in at least one embodiment generally described in this application. The same expression appearing in multiple places in the specification does not necessarily refer to the same embodiment. Further, when describing a specific feature, structure or characteristic in conjunction with any embodiment, it is claimed that the realization of such feature, structure or characteristic in conjunction with other embodiments also falls within the scope of the present invention.

[0037] Although the present invention is described herein with reference to a number of illustrative embodiments of the present invention, it will be appreciated that those skilled in the art may devise many other modifications and implementations that fall within the scope and spirit of the principles disclosed herein. More specifically, within the scope of the present disclosure, drawings, and claims, a variety of variations and improvements may be made to the components and / or layout of the subject combination layout. In addition to variations and improvements made to the components and / or layout, other uses will also be apparent to those skilled in the art.

Claims

1. A shock absorbing device for a stretcher vehicle that can be used in an ambulance, characterized in that The device comprises a wheel-leg shock absorbing unit (1) and a vehicle frame shock absorbing unit (2); The wheel-leg shock absorbing unit (1) comprises a wheel-leg support frame (11), wherein the wheel-leg support frame (11) is movably mounted on a wheel-leg support seat (12), wherein an electromagnet damper (13) is provided inside the wheel-leg support frame (11), wherein a shock absorbing spring body (14) is provided in the middle of the electromagnet damper (13), wherein one end of the shock absorbing spring body (14) abuts against the upper part of the wheel-leg support seat (12), and the other end is fixed on a lifting platform (15), wherein the lifting platform (15) is connected to an adjusting gear (16) through an adjusting rack (151), and the adjusting gear (16) is connected to an adjusting motor power. The adjusting motor and the electromagnet damper (13) are both connected to a posture control board (17), and the posture control board (17) has a control module. The control module adjusts the damping value of the electromagnet damper (13) through a rectifier module based on a signal fed back by a vibration sensor or / and a gyroscope installed on the vehicle frame (3), and controls the start / stop and forward / reverse rotation state of the adjusting motor, and adjusts the feedback force of the shock absorbing spring body (14); the electromagnet damper (13) is cylindrical, and the upper and lower parts of the electromagnet damper (13) respectively contact the upper wall and lower wall of the internal cavity of the wheel leg support frame (11); The vehicle frame shock absorbing unit (2) comprises a shock absorbing bracket (21), the shock absorbing bracket (21) being mounted on a shock absorbing support (22), a plurality of shock absorbing springs (23) and a magnetic suspension sliding platform (24) being arranged between the shock absorbing bracket (21) and the shock absorbing support (22), the magnetic suspension sliding platform (24) being arranged in the middle of the plurality of shock absorbing springs (23), and the magnetic suspension sliding platform (24) being a magnetic oil seal structure with like poles repelling each other; The upper portion of the wheel leg support frame (11) has a forked portion, and the lower portion of the wheel leg support seat (12) has a fixed portion, the forked portion of the wheel leg support frame (11) is provided with a fixing hole (7) corresponding to the frame of the stretcher, and the fixed portion of the wheel leg support seat (12) is provided with a fixing hole (7) corresponding to the wheel leg of the stretcher; The upper portion of the shock absorbing bracket (21) and the lower portion of the shock absorbing support (22) are each provided with a respective forked portion; the forked portion of the upper portion of the shock absorbing bracket (21) is provided with a fixing hole (7) corresponding to the stretcher (5); and the forked portion of the lower portion of the shock absorbing support (22) is provided with a fixing hole (7) corresponding to the frame (3).

2. The shock absorbing device for a stretcher vehicle applicable to an ambulance according to claim 1, characterized in that: The wheel leg support frame (11) is used for being installed on a frame (3) of a stretcher trolley, and the wheel leg support seat (12) is used for being installed on a wheel leg (4) of the stretcher trolley.

3. The shock absorbing device for a stretcher vehicle applicable to an ambulance according to claim 1 or 2, characterized in that: The shock-absorbing bracket (21) is used to be installed on a stretcher (5) of a stretcher trolley, and the shock-absorbing support (22) is used to be installed on a frame (3) of the stretcher trolley.

4. The shock absorbing device for a stretcher vehicle applicable to an ambulance according to claim 1, characterized in that: The device further comprises a spring damping wheel (6), a plurality of wheel springs (63) being installed between the wheel hub (61) and the shaft sleeve (62) of the spring damping wheel, and the spring damping wheel (6) being installed at the lower end of the wheel leg (4) of the stretcher.

5. The shock absorbing device for a stretcher vehicle applicable to an ambulance according to claim 1, characterized in that: The gyroscope, the vibration sensor and the attitude control board (17) are all mounted on the frame (3) of the stretcher trolley. A power supply unit is also mounted on the frame (3) of the stretcher trolley, and the attitude control board (17) is connected to the power supply unit.

6. The shock absorbing device for a stretcher vehicle applicable to an ambulance according to claim 1, characterized in that: The electromagnet damper (13) comprises an energized solenoid (131), a silicon steel electric core tube (132) is provided inside the energized solenoid (131), a movable aluminum column (133) is provided inside the silicon steel electric core tube (132), the energized solenoid (131) is connected to a posture control board (17) via a power line, and the movable aluminum column (133) is connected to the posture control board (17) via a signal line.

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