A slope-stop check mechanism, its usage method and application

Abstract

The invention discloses a slope check mechanism and a use method and application thereof, comprising a rotating shaft, a sleeve, an outer sleeve, a pendulum and a limiting pawl; the sleeve is sleeved on the rotating shaft, and the sleeve and the rotating shaft have rotational freedom and axial movement freedom; the outer sleeve is sleeved on the sleeve through a slide rail, and the outer sleeve and the sleeve have axial movement freedom; the pendulum is rotatably sleeved on the outer sleeve, a lever is provided on the inner wall of the pendulum, a circumferential groove is opened on the outer sleeve, and a section of spiral groove is provided on the outer wall of the sleeve, the lever passes through the circumferential groove on the outer sleeve and extends into the spiral groove on the sleeve; the limiting pawl is installed on the sleeve, and a circle of ratchet is provided on the rotating shaft, when the lever of the pendulum drives the sleeve to move to a certain position, the limiting pawl on the sleeve is meshed with the ratchet on the rotating shaft, so that the rotating shaft can only rotate in one direction, thereby ensuring the safety of users and effectively avoiding the occurrence of accidental dangers of sliding down the slope.

Description

Technical Field

[0001] The invention belongs to the technical field of mechanical transmission braking, and in particular relates to a slope check mechanism and a use method and application thereof. Background Art

[0002] In daily life, most shopping malls and building entrances are designed with barrier-free ramps with steep slopes, which brings great inconvenience and safety hazards to disabled people riding ordinary wheelchairs. At present, although electric wheelchairs have appeared in the consumer market, they are relatively expensive, and even the slightest improper operation will cause safety accidents, which has a great impact. Therefore, for some people with relatively weak constitutions, especially for the elderly, electric wheelchairs do not meet their travel needs.

[0003] Therefore, the market currently needs a mechanism that allows the wheels to only move forward and not backward when in the middle of a ramp, so as to enable the relevant vehicle to stop on the ramp and prevent the vehicle from sliding down the slope. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a slope check mechanism and its use method and application. The mechanism does not require an additional power source and relies solely on the gravity of the pendulum as input to achieve the slope check function. The mechanism is suitable for equipment with relevant application demands such as wheelchairs, baby carriages, and ambulance stretchers, which can improve the safety factor of the use of related equipment, facilitate people's lives, and avoid accidents.

[0005] The present invention is achieved through the following technical solutions:

[0006] A slope check mechanism comprises a rotating shaft, a sleeve, a sleeve, a pendulum and a limit pawl;

[0007] The sleeve is sleeved on the rotating shaft, and there is rotational freedom and axial movement freedom between the sleeve and the rotating shaft; the outer sleeve is sleeved on the sleeve through a slide rail, and there is axial movement freedom between the outer sleeve and the sleeve; the pendulum is rotatably sleeved on the outer sleeve, a lever is arranged on the inner wall of the pendulum, a circumferential groove is opened on the outer sleeve, and a section of spiral groove is arranged on the outer wall of the sleeve, and the lever passes through the circumferential groove on the outer sleeve and extends into the spiral groove on the sleeve;

[0008] The limit pawl is installed on the sleeve, and a ratchet wheel is arranged on the rotating shaft. When the lever of the pendulum drives the sleeve to move to a certain position, the limit pawl on the sleeve is engaged with the ratchet wheel on the rotating shaft, so that the rotating shaft can only rotate in one direction.

[0009] In the above technical solution, a protruding slideway is provided on the outer wall of the sleeve along its axial direction, and a corresponding slideway is provided on the inner wall of the outer sleeve along its axial direction, and the slideway and the slideway are installed in a sliding manner.

[0010] In the above technical solution, there are two raised slideways on the outer wall of the sleeve, which are symmetrically arranged; there are two slide grooves on the inner wall of the outer sleeve, which are symmetrically arranged.

[0011] In the above technical solution, the number of the limiting pawls is 4, which are arranged on the sleeve at equal intervals along the circumference.

[0012] In the above technical solution, the limiting pawl includes a straight rod section, a pawl and a spring. The pawl is connected to the bottom end of the straight rod section. The straight rod section is movably mounted in the mounting hole on the sleeve. The spring is sleeved on the straight rod section to provide an inward elastic restoring force for the limiting pawl.

[0013] In the above technical solution, when in use, the outer cover is fixed on the frame base, and the wheel is installed on the rotating shaft.

[0014] The method of using the above-mentioned slope check mechanism is as follows:

[0015] The outer sleeve of the slope check mechanism is fixedly installed on the frame base. When the vehicle body is on a flat road, the limit pawl on the sleeve and the ratchet on the rotating shaft are not in a combined state. In this state, the vehicle body can move forward and backward normally.

[0016] When the vehicle body is on a slope, the pendulum deflects under the action of gravity, and then the lever of the pendulum drives the sleeve to move axially relative to the rotating shaft, so that the limit pawl on the sleeve and the ratchet on the rotating shaft enter a coupled state. In this state, the vehicle body can only move forward, achieving the effect of stopping on the slope and preventing the danger of sliding down the slope.

[0017] The application of the slope-stopping mechanism in a wheelchair comprises a wheelchair base and the slope-stopping mechanism, wherein the outer cover of the slope-stopping mechanism is fixedly mounted on the wheelchair base, and two wheels of the wheelchair are mounted on both ends of the rotating shaft of the slope-stopping mechanism, and the slope-stopping function of the wheelchair is realized by the slope-stopping mechanism.

[0018] The application of the slope-stopping mechanism in a baby stroller comprises a baby stroller base and the slope-stopping mechanism, wherein the outer cover of the slope-stopping mechanism is fixedly mounted on the baby stroller base, and the two rear wheels or the two front wheels of the baby stroller are mounted on both ends of the rotating shaft of the slope-stopping mechanism, and the slope-stopping function of the baby stroller is realized by the slope-stopping mechanism.

[0019] The application of the slope-stopping mechanism in an ambulance stretcher trolley comprises an ambulance stretcher trolley base and the slope-stopping mechanism, wherein the outer cover of the slope-stopping mechanism is fixedly installed on the ambulance stretcher trolley base, and the two rear wheels or the two front wheels of the ambulance stretcher trolley are installed at the two ends of the rotating shaft of the slope-stopping mechanism, and the slope-stopping function of the ambulance stretcher trolley is realized by the slope-stopping mechanism.

[0020] The advantages and beneficial effects of the present invention are:

[0021] The present invention realizes the function of the vehicle body staying on a ramp, ensuring the safety of users and effectively avoiding the accidental danger of slipping.

[0022] Through the cooperation of the ratchet shaft and the clamping rod, the present invention can not only well realize the above functions, but also does not require electric drive, which is low-carbon and environmentally friendly.

[0023] The present invention has a wide range of applications and is applicable to equipment with relevant application requirements such as wheelchairs, baby carriages, ambulance stretchers, etc. It can improve the safety factor of the relevant equipment, facilitate people's lives and avoid accidents. Description of the Drawings

[0024] Figure 1 It is a cross-sectional view of the slope-stop mechanism of the present invention.

[0025] Figure 2 It is Figure 1 A sectional view taken in the direction D of the slope-stop mechanism shown.

[0026] Figure 3 It is Figure 1 A sectional view taken in the direction C of the slope-stop mechanism shown.

[0027] Figure 4 It is Figure 1 A sectional view taken in the direction B of the slope-stop mechanism shown.

[0028] Figure 5 It is Figure 1 A sectional view taken in the direction A of the slope-stop mechanism shown.

[0029] Figure 6 It is a three-dimensional structure schematic diagram of the slope-stop mechanism of the present invention.

[0030] Figure 7 It is a three-dimensional structure schematic diagram of the slope-stop mechanism of the present invention after removing the sleeve.

[0031] Figure 8 It is a three-dimensional structure schematic diagram of the slope-stop mechanism of the present invention.

[0032] Among them:

[0033] 1. Rotating shaft 2. Sleeve 3. Outer sleeve 4. Pendulum 5. Limiting ratchet pawl.

[0034] For those of ordinary skill in the art, without creative work, other relevant drawings can be obtained based on the above drawings. Detailed Embodiments

[0035] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solution of the present invention will be further described below in conjunction with specific embodiments.

[0036] Embodiment 1

[0037] Referring to the attached drawings, a slope-stop check mechanism includes a rotating shaft 1, a sleeve 2, an outer sleeve 3, a pendulum 4 and a limiting pawl 5.

[0038] The sleeve 2 is sleeved on the rotating shaft 1, and there is a rotational freedom and an axial movement freedom between the sleeve 2 and the rotating shaft 1; the outer sleeve 3 is sleeved on the sleeve 2 through two slide rails (i.e., two raised slideways 2.1 are arranged axially on the outer wall of the sleeve 2, and two corresponding chutes 3.1 are arranged axially on the inner wall of the outer sleeve 3, and the slideways and the chutes are slidably fitted), and there is an axial movement freedom between the outer sleeve 3 and the sleeve 2; the pendulum 4 is rotatably sleeved on the outer sleeve 3 and can freely rotate on the outer sleeve. A dial rod 4.1 is arranged on the inner wall of the pendulum 4. A circumferential channel 3.2 is opened on the outer sleeve 3, and a section of spiral wire groove 2.2 is arranged on the outer wall of the sleeve 2. The dial rod 4.1 passes through the circumferential channel 3.2 on the outer sleeve and extends into the spiral wire groove 2.2 on the sleeve. In this way, when the pendulum rotates around the outer sleeve (during use, the position of the outer sleeve is fixed, and due to the cooperation between the pendulum and the circumferential channel on the outer sleeve, there is only a rotational freedom between the pendulum and the outer sleeve), the dial rod of the pendulum will drive the sleeve to move axially relative to the rotating shaft.

[0039] The limiting pawl 5 is installed on the sleeve 2, and a ratchet wheel 1.1 is arranged in a circle on the rotating shaft 1. When the dial rod of the pendulum drives the sleeve to move to a certain position, the limiting pawl on the sleeve meshes with the ratchet wheel on the rotating shaft, so that the rotating shaft 1 can only rotate unidirectionally.

[0040] The usage method of the slope-stop check mechanism of the present invention is as follows:

[0041] The outer sleeve of the slope-stop check mechanism is fixedly installed with the vehicle frame base. When the vehicle body is on a flat road condition, the limiting pawl on the sleeve and the ratchet wheel on the rotating shaft are in a non-engaged state. In this state, the vehicle body can move forward and backward normally.

[0042] When the vehicle body is on a slope road condition, the pendulum deflects under the action of gravity, and then the dial rod of the pendulum will drive the sleeve to move axially relative to the rotating shaft, so that the limiting pawl on the sleeve and the ratchet wheel on the rotating shaft enter the engaged state. In this state, the vehicle body can only move forward, achieving the effect of staying on the slope and preventing the danger of slipping.

[0043] Embodiment 2

[0044] Furthermore, the limiting pawl 5 includes a straight rod section 5.1, a pawl 5.2 and a spring 5.3. The pawl 5.2 is connected to the bottom end of the straight rod section 5.1. The straight rod section 5.1 is movably installed in the installation hole on the sleeve, and the spring sleeve 5.3 is sleeved on the straight rod section 5.1 to provide an elastic restoring force for the limiting pawl inward (i.e., towards the rotating shaft).

[0045] Furthermore, the number of the limiting pawls 5 is preferably four, and they are arranged on the sleeve at equal intervals along the circumference.

[0046] Embodiment 3

[0047] Application of the slope-checking non-return mechanism described in the above embodiments in a wheelchair: It includes a wheelchair base body and a slope-checking non-return mechanism. The outer sleeve of the slope-checking non-return mechanism is fixedly installed on the wheelchair base body. Two wheels of the wheelchair are installed at both ends of the rotating shaft of the slope-checking non-return mechanism, and the slope-checking non-return function of the wheelchair is realized through the slope-checking non-return mechanism.

[0048] Embodiment 4

[0049] Application of the slope-checking non-return mechanism described in the above embodiments in a baby carriage: It includes a baby carriage base body and a slope-checking non-return mechanism. The outer sleeve of the slope-checking non-return mechanism is fixedly installed on the baby carriage base body. Two rear wheels or two front wheels of the baby carriage are installed at both ends of the rotating shaft of the slope-checking non-return mechanism, and the slope-checking non-return function of the baby carriage is realized through the slope-checking non-return mechanism.

[0050] Embodiment 5

[0051] Application of the slope-checking non-return mechanism described in the above embodiments in an ambulance stretcher: It includes an ambulance stretcher base body and a slope-checking non-return mechanism. The outer sleeve of the slope-checking non-return mechanism is fixedly installed on the ambulance stretcher base body. Two rear wheels or two front wheels of the ambulance stretcher are installed at both ends of the rotating shaft of the slope-checking non-return mechanism, and the slope-checking non-return function of the ambulance stretcher is realized through the slope-checking non-return mechanism.

[0052] For ease of explanation, spatial relative terms such as "upper", "lower", "left", "right", etc. are used in the embodiments to describe the relationship of one element or feature shown in the figure relative to another element or feature. It should be understood that, in addition to the orientation shown in the figure, the spatial terms are intended to include different orientations during the use or operation of the device. For example, if the device in the figure is inverted, the element described as being "below" other elements or features will be positioned "above" other elements or features. Therefore, the exemplary term "lower" can include both upper and lower orientations. The device can be positioned in other ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used here can be interpreted accordingly.

[0053] Moreover, relational terms such as "first" and "second" are only used to distinguish one component with the same name from another, and do not necessarily require or imply any such actual relationship or order between these components.

[0054] The above has made an exemplary description of the present invention. It should be noted that without departing from the core of the present invention, any simple deformation, modification or equivalent substitution that can be made by those skilled in the art without creative efforts shall fall within the protection scope of the present invention.

Claims

1. A slope-stop check mechanism, characterized in that: It includes a rotating shaft, a sleeve, an outer sleeve, a pendulum and a limiting pawl; The sleeve is sleeved on the rotating shaft, and there is a rotational freedom and an axial movement freedom between the sleeve and the rotating shaft; the outer sleeve is sleeved on the sleeve through a slide rail, and there is an axial movement freedom between the outer sleeve and the sleeve; the pendulum is rotatably sleeved on the outer sleeve, a shifting lever is arranged on the inner wall of the pendulum, a circumferential channel is formed on the outer sleeve, and a section of spiral groove is arranged on the outer wall of the sleeve. The shifting lever passes through the circumferential channel on the outer sleeve and extends into the spiral groove on the sleeve; The limiting pawl is installed on the sleeve, and a ratchet wheel is arranged in a circle on the rotating shaft. When the shifting lever of the pendulum moves the sleeve to a certain position, the limiting pawl on the sleeve meshes with the ratchet wheel on the rotating shaft, so that the rotating shaft can only rotate unidirectionally; A raised slideway is axially arranged on the outer wall of the sleeve, and a corresponding chute is axially arranged on the inner wall of the outer sleeve. The slideway and the chute are slidably matched and installed; The limiting pawl includes a straight rod section, a pawl and a spring. The pawl is connected to the bottom end of the straight rod section. The straight rod section is movably installed in the installation hole on the sleeve, and the spring is sleeved on the straight rod section to provide an inward elastic restoring force for the limiting pawl.

2. The slope-stop check mechanism according to claim 1, characterized in that: The number of the raised slideways on the outer wall of the sleeve is two, and they are symmetrically arranged; the number of the chutes on the inner wall of the outer sleeve is two, and they are symmetrically arranged.

3. The slope-stop check mechanism according to claim 1, characterized in that: The number of the limiting pawls is 4, and they are arranged at equal intervals along the circumference on the sleeve.

4. The slope-stop check mechanism according to claim 1, characterized in that: During use, the outer sleeve is fixed on the vehicle frame base body, and a wheel is installed on the rotating shaft.

5. The using method of the slope-up non-return mechanism according to any one of claims 1-4, characterized in that: The outer sleeve of the slope-up non-return mechanism is fixedly installed with the vehicle frame base body. When the vehicle body is in a flat road condition, the limiting pawl on the sleeve and the ratchet wheel on the rotating shaft are in a non-engaged state. In this state, the vehicle body can move forward and backward normally; When the vehicle body is in a slope road condition, the pendulum deflects under the action of gravity. Furthermore, the shifting lever of the pendulum will move the sleeve axially relative to the rotating shaft, so that the limiting pawl on the sleeve and the ratchet wheel on the rotating shaft enter an engaged state. In this state, the vehicle body can only move forward.

6. The application of the slope-stop check mechanism according to any one of claims 1-4 in a wheelchair, characterized in that: It includes a wheelchair base body and a slope-up non-return mechanism. The outer sleeve of the slope-up non-return mechanism is fixedly installed with the wheelchair base body. Two wheels of the wheelchair are installed at both ends of the rotating shaft of the slope-up non-return mechanism, and the slope-up non-return function of the wheelchair is realized through the slope-up non-return mechanism.

7. Application of the slope-stop check mechanism according to any one of claims 1-4 in a baby stroller, characterized in that: It includes a baby carriage base body and a slope-up non-return mechanism. The outer sleeve of the slope-up non-return mechanism is fixedly installed with the baby carriage base body. Two rear wheels or two front wheels of the baby carriage are installed at both ends of the rotating shaft of the slope-up non-return mechanism, and the slope-up non-return function of the baby carriage is realized through the slope-up non-return mechanism.

8. The application of the slope-stop check mechanism as described in any one of claims 1-4 in an ambulance stretcher, characterized in that: It includes an ambulance stretcher vehicle base body and a slope-up non-return mechanism. The outer sleeve of the slope-up non-return mechanism is fixedly installed with the ambulance stretcher vehicle base body. Two rear wheels or two front wheels of the ambulance stretcher vehicle are installed at both ends of the rotating shaft of the slope-up non-return mechanism, and the slope-up non-return function of the ambulance stretcher vehicle is realized through the slope-up non-return mechanism.

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