CN117796923B - Trolley chassis and medical trolley - Google Patents
Trolley chassis and medical trolley Download PDFInfo
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- CN117796923B CN117796923B CN202410217893.9A CN202410217893A CN117796923B CN 117796923 B CN117796923 B CN 117796923B CN 202410217893 A CN202410217893 A CN 202410217893A CN 117796923 B CN117796923 B CN 117796923B
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- 230000001360 synchronised effect Effects 0.000 claims description 2
- 230000002093 peripheral effect Effects 0.000 description 9
- 238000010586 diagram Methods 0.000 description 3
- 238000007689 inspection Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000002265 prevention Effects 0.000 description 3
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Abstract
The invention belongs to the technical field of medical equipment, and discloses a cart chassis and a medical cart, wherein the cart chassis comprises a bottom plate, a central control wheel assembly and an anti-unlocking mechanism, the central control wheel assembly comprises a central control wheel and a locking shaft connected between the central control wheel, a pedal is arranged on the locking shaft, the pedal can drive the locking shaft to rotate so as to lock the locking shaft and the central control wheel, the anti-unlocking mechanism comprises a ratchet wheel, a pawl assembly and a driving piece, the ratchet wheel is connected with the locking shaft, the pawl assembly comprises a fixed seat, a pawl, a limiting rod, a first elastic piece, a positioning column and a second elastic piece, the pawl and the limiting rod are movably arranged on the fixed seat, the first elastic piece drives the pawl to move towards the ratchet wheel, the second elastic piece enables the limiting rod to be far away from the ratchet wheel, the positioning column penetrates through the pawl and the limiting rod and can be in clearance fit with the pawl, and the driving piece is connected with the limiting rod in a driving way so that the pawl can be matched with the ratchet wheel to lock the central control wheel. Under the condition that the chassis of the cart is mislocked after parking, the chassis of the cart can be locked and stopped by the chassis of the cart, so that the chassis of the cart can be ensured to be used.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to a cart chassis and a medical cart.
Background
When the medical staff examines the patient, the inconvenient circumstances of motion of patient can be met, just needs medical staff to use the medical shallow to promote the medical equipment to the patient side this moment to examine the patient, in order to ensure the accuracy of inspection result, then need guarantee to place at the in-process medical equipment stability of inspection. But when checking the patient, medical staff need to operate medical equipment, and medical staff often appears touching medical shallow unlocking device's condition at the in-process of operation, because current medical shallow's chassis does not possess the function that prevents medical shallow mistake unblock, consequently after medical staff carelessly touches medical shallow's unlocking device, medical shallow just can produce the motion, need medical staff touch brake mechanism again and just can make medical shallow stop the motion, not only make medical staff's work degree of difficulty increase, also can not guarantee patient's inspection result's accuracy simultaneously.
Therefore, a cart chassis and a medical cart are needed to solve the above technical problems.
Disclosure of Invention
The invention aims to provide a chassis of a cart, which has the function of preventing the misoperation of braking, ensures that the chassis of the cart can be locked and stopped by itself even if an unlocking device is touched when the cart is parked, does not need manual operation of medical staff, and reduces the working difficulty of the medical staff.
To achieve the purpose, the invention adopts the following technical scheme:
A cart chassis, comprising:
The central control wheel assembly comprises a central control wheel and a locking shaft connected between the central control wheels, a pedal is connected to the locking shaft, and the pedal can drive the locking shaft to rotate so as to lock the locking shaft and the central control wheels;
The anti-unlocking mechanism comprises a ratchet, a pawl assembly and a driving piece, wherein the ratchet is connected with a locking shaft, the pawl assembly comprises a fixed seat, a pawl, a limiting rod, a first elastic piece, a positioning column and a second elastic piece, the fixed seat is fixed on the bottom plate, the pawl and the limiting rod are movably arranged on the fixed seat, the first elastic piece is positioned between the fixed seat and the pawl, the pawl is close to the ratchet, the second elastic piece is positioned between the fixed seat and the limiting rod, the limiting rod is far away from the ratchet, the positioning column is connected with the pawl and the limiting rod in a penetrating mode, the positioning column is in clearance fit with the pawl, the driving piece is in driving connection with the limiting rod, the pawl is matched with the ratchet, and when the driving piece drives the limiting rod to move, the pawl always has a retreating space relative to the positioning column.
As the preferential technical scheme on shallow chassis, the fixing base includes first spout and baffle, the pawl slides and locates in the first spout, the pawl includes motion end and first end that stretches out, the motion end is located in the first spout, first end that stretches out stretch out first spout and towards the ratchet, the baffle is used for shutoff first spout, first elastic component butt in between the motion end with the baffle.
As a preferable technical scheme of the chassis of the trolley, the pawl is provided with an inserting part, the inserting part is positioned at the end part of the first extending end, and the inserting part is matched with a gear clearance at the periphery of the ratchet wheel so that the pawl and the ratchet wheel are matched and locked with the central control wheel.
As the preferential technical scheme on shallow chassis, the fixing base includes the second spout, the gag lever post slides and locates in the second spout, the gag lever post includes pushing end and second and stretches out the end, pushing end is located in the second spout, the second stretch out the end stretch out in the second spout, the second elastic component is located the second spout inner wall with the pushing end is towards between the terminal surface of ratchet.
As the preferable technical scheme of shallow chassis, the pawl orientation the one end of ratchet is equipped with the through-hole, correspond on the gag lever post and be equipped with the locating hole, the reference column passes the through-hole and with the locating hole locking, the through-hole aperture is greater than the reference column external diameter, the reference column with the through-hole is close to the side of ratchet all the time has the clearance, so that the reference column with the pawl can clearance fit.
As the preferable technical scheme of shallow chassis, the driving piece includes the push rod, the push rod can selectively promote the gag lever post motion, the driving piece has power-on state and power-off state, when the driving piece is in the power-on state, the push rod stretches out and promotes the gag lever post orientation ratchet motion, when the driving piece is in the power-off state, the push rod withdrawal is kept away from the gag lever post.
As the preferable technical scheme of the chassis of the trolley, the driving piece is an electromagnetic lock pin.
As the preferred technical scheme of shallow chassis, well accuse wheel is equipped with a plurality ofly, same side is adjacent well accuse wheel is by one locking axle connects, the shallow chassis still includes the connecting rod, the connecting rod is connected in the difference between the locking axle, the connecting rod can make the difference locking axle synchronous motion.
As the preferable technical scheme of the chassis of the trolley, the ratchet wheel and the locking shaft can be detachably connected.
The second object of the invention is to provide a medical cart, which adopts the following technical scheme:
a medical cart comprising the cart chassis of any of the above aspects, the medical cart further comprising a mounting bracket removably attached to the cart chassis, the mounting bracket configured to house a medical device or medical cabinet.
The beneficial effects of the invention are as follows:
According to the chassis of the cart, the ratchet wheel and the pawl assembly are arranged on the bottom plate, the ratchet wheel is connected with the locking shaft, the pawl assembly comprises the fixed seat, the pawl, the limiting rod, the first elastic piece, the positioning column and the second elastic piece, the pawl and the limiting rod are movably arranged in the fixed seat, the first elastic piece is abutted between the pawl and the inner wall of the fixed seat, the pawl has a trend of approaching the ratchet wheel under the pushing of the elastic force of the first elastic piece, the second elastic piece is abutted between the limiting rod and the fixed seat, the limiting rod has a trend of being far away from the ratchet wheel under the elastic force of the second elastic piece, the positioning column is connected between the pawl and the limiting rod in a penetrating way, so that the first elastic piece is compressed under the common condition that the positioning column is abutted with the pawl and the limiting rod and is far away from the ratchet wheel under the elastic force of the second elastic piece, the pawl cannot extend out of the fixed seat completely, the distance between the pawl and the ratchet wheel exists, the driving piece is connected with the limiting rod, and is used for driving the limiting rod to move towards the ratchet wheel, the positioning column can be driven to move along with the movement of the limiting rod, the extending length of the pawl in the fixed seat is gradually approaching the ratchet wheel, the pawl is finally inserted into the gap of the peripheral gear, the ratchet wheel cannot rotate, the locking shaft cannot be controlled, and the locking wheel cannot be locked, and can be locked. The positioning column and the pawl are in clearance fit, when the driving piece drives the limiting rod to move towards the ratchet wheel, after the pawl is inserted into the clearance of the peripheral gear of the ratchet wheel, the clearance is reserved between the positioning column and the pawl, the pawl always has a retreating space relative to the positioning column, so that the positioning column and the limiting rod cannot collide even if the pawl retreats, the positioning column and the limiting rod retreat, and the limiting rod and the driving piece are prevented from being subjected to reverse thrust to damage the performance of the driving piece if the pawl retreats; in the use to the shallow chassis, medical personnel if the unblock part of brake is touched in the mistake, locking axle motion and drive ratchet motion this moment, because pawl one end and ratchet cooperation are in order to prevent locking axle rotation, the other end and first elastic component butt, so when locking axle drive ratchet take place to rotate, the pawl butt force just can be given to after ratchet and the pawl butt, make the pawl fall back, first elastic component compression this moment, after the ratchet rotates the angle of a gear, just not being in the butt pawl, first elastic component does not receive external force this moment, consequently, the pawl can insert in the clearance of ratchet peripheral gear again, even medical personnel appear the maloperation after, well accuse wheel also can be locked by once more, do not influence medical personnel to medical handcart's use.
The medical trolley provided by the invention can flexibly change the braking and unlocking, and can be quickly locked even if the unlocking part is touched by mistake in a parking state, so that the work and the use of medical staff are not influenced.
Drawings
FIG. 1 is a schematic view of a cart chassis provided by the present invention;
FIG. 2 is a schematic diagram of the operation of the anti-unlocking mechanism of the chassis of the cart provided by the invention;
FIG. 3 is a schematic diagram of the internal structure of the pawl control assembly of the present invention when the control wheel is unlocked in the chassis of the cart;
Fig. 4 is a schematic diagram of the internal structure of the pawl control assembly when the central control wheel of the chassis of the cart is locked.
In the figure:
1. a bottom plate; 2. a central control wheel assembly; 20. a central control wheel; 21. a locking shaft; 3. a brake pedal;
4. An unlocking prevention mechanism; 41. a ratchet wheel; 42. a pawl assembly;
421. a fixing seat; 4211. a first chute; 4212. a second chute; 4213. a baffle;
422. A pawl; 4221. a motion end; 4222. a first extension; 4223. an insertion section; 4224. a through hole;
423. a limit rod; 4231. a pushing end; 4232. a second extension;
424. a first elastic member; 425. positioning columns; 426. a second elastic member;
43. a driving member; 431. a push rod;
5. A connecting rod; 6. the pedal is unlocked.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.
In the description of the present invention, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "right", etc. orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the invention. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.
As shown in fig. 1 to 4, the cart chassis provided in this embodiment includes a bottom plate 1, a central control wheel assembly 2 and an unlocking preventing mechanism 4, the central control wheel assembly 2 is disposed on the bottom plate 1, the central control wheel assembly 2 includes central control wheels 20 and a locking shaft 21 connected between the central control wheels 20, the locking shaft 21 is connected with a pedal, the locking shaft 21 can rotate after the pedal is stepped on, the locking shaft 21 and the central control wheels 20 are locked, at this time, the cart chassis stops moving and stops in place. The central control wheel 20 is provided with a bolt assembly, the bolt assembly comprises a bolt, the bolt can be selectively inserted into a hub of the central control wheel 20 to control locking and unlocking of the central control wheel 20, wherein a locking shaft 21 is connected with an adjusting piece which is arranged in the bolt assembly and controls the bolt to extend out, so that when the locking shaft 21 rotates, the adjusting piece rotates and the bolt extends out to lock the central control wheel 20, and the central control wheel 20 belongs to common components in the field of medical carts and does not belong to the important protection scope of the invention.
As shown in fig. 2 to 4, the unlocking prevention mechanism 4 comprises a ratchet 41, a pawl assembly 42 and a driving piece 43, the ratchet 41 is connected with a locking shaft 21, the pawl assembly 42 comprises a fixed seat 421, a pawl 422, a limit rod 423, a first elastic piece 424, a positioning column 425 and a second elastic piece 426, the pawl 422 and the limit rod 423 are movably arranged in the fixed seat 421, the first elastic piece 424 is abutted between the pawl 422 and the inner wall of the fixed seat 421, the pawl 422 has a trend of approaching the ratchet 41 under the pushing of the elastic force of the first elastic piece 424, the second elastic piece 426 is abutted between the limit rod 423 and the fixed seat 421, the limit rod 423 has a trend of being far away from the ratchet 41 under the elastic force of the second elastic piece 426, the positioning column 425 is connected between the pawl 422 and the limit rod 423 in a penetrating way, so that under the common condition that the positioning column 425 is abutted against the pawl 422 and the limit rod 423 and is far away from the ratchet 41, the pawl 422 cannot be fully extended out of the fixed seat 421, the pawl 422 and the ratchet 41 have a space, the driving piece 43 is connected with the limit rod 424, and the driving piece 423 is used for driving the pawl 422 to move towards the ratchet 41, and gradually, and the ratchet shaft 423 can not be locked and gradually moved towards the ratchet shaft 41, and the outer side of the fixed seat 41 is controlled to move, and the ratchet 41 is gradually, and the locking shaft is controlled to move towards the ratchet 41, and the position of the ratchet shaft is gradually, and the position-controlled to move, if the ratchet is not can be locked towards the limit rod 41, and the position is gradually moved towards the ratchet 41. Wherein, the locating column 425 is clearance fit with the pawl 422, when the driving piece 43 drives the limiting rod 423 to move towards the ratchet 41, after the pawl 422 is inserted into the clearance of the peripheral gear of the ratchet 41, the locating column 425 and the pawl 422 have clearance, the pawl 422 has space for retreating relative to the locating column 425 all the time, so that the locating column 425 and the limiting rod 423 are not collided even if the pawl 422 retreats, the limiting rod 423 is subjected to reverse thrust, and the performance of the driving piece 43 is prevented from being damaged if the pawl 422 retreats and the limiting rod 423 and the driving piece 43 are subjected to reverse thrust.
In the actual use of the chassis of the cart, if a medical staff touches the unlocking part of the brake by mistake, at the moment, the locking shaft 21 moves and drives the ratchet 41 to move, one end of the pawl 422 is matched with the ratchet 41 to prevent the locking shaft 21 from rotating, and the other end of the pawl 422 is abutted against the first elastic member 424, so that when the locking shaft 21 drives the ratchet 41 to rotate, the ratchet 41 is abutted against the pawl 422 to give an abutting force to enable the pawl 422 to retract, at the moment, the first elastic member 424 is compressed, after the ratchet 41 rotates by an angle of one gear, the pawl 422 is not abutted against the pawl 422, and at the moment, the first elastic member 424 is not subjected to external force, so that the pawl 422 can be inserted into a gap of the peripheral gear of the ratchet 41 again, and even if the medical staff operates by mistake, the central control wheel 20 can be locked again, and the use of the cart of the medical staff is not influenced. Because the driving piece 43 drives the limiting rod 423 to move, after the pawl 422 is inserted into the gap of the peripheral gear of the ratchet 41, the pawl 422 always has a retreating space relative to the positioning column 425, when a medical staff mistakenly touches the unlocking part, the pawl 422 can not collide with the positioning column 425 even when the ratchet 41 pushes the pawl 422 to retreat, and the reverse thrust force is not given to the limiting rod 423 and the driving piece 43, so that the performance of the limiting rod 423 and the driving piece 43 is protected when the medical staff mistakenly touches the unlocking part.
As shown in fig. 2 to 4, the fixed seat 421 includes a first chute 4211 and a blocking plate 4213, the pawl 422 is slidably disposed in the first chute 4211, the pawl 422 includes a moving end 4221 and a first protruding end 4222, the moving end 4221 is located in the first chute 4211, the first protruding end 4222 protrudes out of the first chute 4211 and faces the ratchet 41, the blocking plate 4213 is used for blocking an opening of the first chute 4211, and the first elastic member 424 is abutted between the moving end 4221 of the pawl 422 and the blocking plate 4213 to realize a force for giving the pawl 422 a pushing force in a direction of the ratchet 41. Illustratively, the first elastic member 424 in this embodiment may be a spring, or other components, which is not limited herein. Further, the baffle 4213 is detachably connected to the fixing seat 421, so that a processing person can assemble the pawl assembly 42 conveniently, and meanwhile, a medical person can regularly maintain and replace the pawl 422 and the first elastic member 424 in the pawl assembly 42, so that the service performance of the chassis of the cart is ensured, and the reaction agility of the unlocking prevention mechanism 4 is ensured.
Preferably, the pawl 422 further has an insertion portion 4223 at an end of the first protruding end 4222, and the insertion portion 4223 is adapted to be in clearance with the outer peripheral gear of the ratchet wheel 41, so that the insertion portion 4223 can be smoothly inserted into the outer peripheral gear clearance of the ratchet wheel 41 to prevent the locking shaft 21 from rotating under the cooperation of the pawl 422 and the ratchet wheel 41 to lock the center wheel 20. Meanwhile, the arrangement of the insertion part 4223 can prevent the pawl 422 and the ratchet wheel 41 from being scratched when being matched with the locking central control wheel 20, so that the usability of the pawl 422 and the ratchet wheel 41 is further protected.
Preferably, the fixing seat 421 includes a second sliding groove 4212, the limiting rod 423 is slidably disposed in the second sliding groove 4212, the limiting rod 423 includes a pushing end 4231 and a second extending end 4232, the pushing end 4231 is located in the second sliding groove 4212, the second extending end 4232 points to the ratchet 41, the second elastic member 426 is located between the inner wall of the second sliding groove 4212 and the end face of the moving end 4221, which faces the ratchet 41, so that when the medical staff finishes using the cart chassis, the driving member 43 does not move towards the ratchet 41 when driving the limiting rod 423, the limiting rod 423 is reset to the initial position under the action of the second elastic member 426, so as to avoid manual reset, so that the convenience in use of the cart chassis is further improved, and meanwhile, the elastic force of the second elastic member 426 is greater than that of the first elastic member 424, so that when the second elastic member 426 resets, the first elastic member 424 is compressed, and simultaneously, the pawl 422 and the limiting rod 423 are kept away from the ratchet 41, and are not locked on the ratchet 41, so that the manual operation difficulty is avoided, and the operation difficulty of the medical staff is reduced.
Illustratively, a through hole 4224 is provided at one end of the pawl 422 facing the ratchet 41, and a positioning hole is provided on the limiting rod 423, the positioning hole is provided on the second extending end 4232, and the positioning post 425 passes through the through hole 4224 and is locked with the positioning hole to realize that the positioning post 425 passes through and connects the pawl 422 and the limiting rod 423, wherein the aperture of the through hole 4224 is larger than the outer diameter of the positioning post 425, so that a gap can be generated between the positioning post 425 and the through hole 4224 after the positioning post 425 passes through the through hole 4224, and meanwhile, the positioning post 425 is always in gap with the side of the through hole 4224 close to the ratchet 41, so that a space for retreating relative to the positioning post 425 can be provided between the positioning post 425 and the pawl 422, thereby realizing a clearance fit.
Preferably, the driving member 43 is disposed at the rear end of the pawl assembly 42, so as to facilitate the movement of the limiting rod 423 toward the ratchet 41, and the pawl 422 is inserted into the gap between the peripheral gears of the ratchet 41 along with the movement of the limiting rod 423, so as to lock the central control wheel 20, and the process does not need manual operation, so that the convenience in use of the chassis of the cart is improved. The driving piece 43 comprises a push rod 431, the push rod 431 can selectively push the limiting rod 423 to move, the driving piece 43 is provided with a power line which can be connected with an external power supply, when the driving piece 43 is in the power-on state, the push rod 431 stretches out and pushes the limiting rod 423 to move towards the ratchet wheel 41, when the driving piece 43 is in the power-down state, the push rod 431 retracts away from the limiting rod 423, so that the cart chassis is guaranteed to be used, the driving piece 43 is powered down, and the cart chassis can normally move after touching the unlocking part. For example, the driving member 43 may be an electromagnetic lock pin, which has a simple overall structure and is convenient to install, and of course, other components, such as a telescopic motor or a cylinder, may be selected with respect to the selection of the driving member 43, which is not particularly limited herein.
In this embodiment, as shown in fig. 1, a plurality of central control wheels 20 may be disposed, and the plurality of central control wheels 20 are uniformly distributed below the bottom plate 1, so as to improve the overall balance of the chassis of the cart, and also facilitate pushing of the chassis of the cart, for example, 4 central control wheels 20 may be disposed, and 4 central control wheels 20 are respectively disposed at four corner positions of the bottom plate 1. Further, the central control wheels 20 adjacent to the same side can be connected with the locking shafts 21 by the same side, the cart chassis further comprises a connecting rod 5, and the connecting rod 5 is connected between the different locking shafts 21, so that the different locking shafts 21 can synchronously rotate under the connection of the connecting rod 5, namely, one locking shaft 21 is controlled to rotate, and the other locking shaft 21 can simultaneously rotate, so that a plurality of central control wheels 20 can be synchronously locked.
In this embodiment, the footboard divide into brake pedal 3 and unlocking pedal 6, and brake pedal 3 and unlocking pedal 6 all are connected with locking axle 21, and when the brake pedal 3 is stepped on, locking axle 21 forward rotation this moment, the bolt stretches into in the wheel hub, and well accuse wheel 20 locks, and when stepping on unlocking pedal 6, locking axle 21 reverse rotation returns initial position this moment, and the bolt withdraws from the wheel hub, and well accuse wheel 20 unblock, the shallow chassis can be promoted. The forward rotation and the reverse rotation mentioned in this embodiment are merely distinction of the rotation directions of the locking shaft 21, so long as it is ensured that the rotation directions of the locking shaft 21 are not uniform when the brake pedal 3 and the unlocking pedal 6 are depressed, and the clockwise rotation or the counterclockwise rotation is specific, and are not limited herein. In order to facilitate the medical staff to control the movement of the brake chassis, i.e. to control the locking and unlocking of the central control wheel 20, in this embodiment the brake pedal 3 and the unlocking pedal 6 are arranged on the same locking shaft 21.
In order to facilitate maintenance and replacement of the ratchet wheel 41, in this embodiment, the ratchet wheel 41 is detachably connected to the locking shaft 21, and the ratchet wheel 41 and the locking shaft 21 are locked with each other by using bolts and nuts, and of course, other parts may be used to lock the locking shaft 21 and the ratchet wheel 41 with each other, which is not particularly limited.
Example two
This embodiment provides a medical handcart, including the shallow chassis in embodiment one, medical handcart still includes the mounting bracket, and the connection is dismantled in the shallow chassis to the mounting bracket, can be used to place medical equipment and medical cabinet on the mounting bracket, in the in-service use, the medical personnel can be according to the medical equipment of promotion or the mounting bracket of the corresponding specification of the specification matching installation of medical cabinet of needs to improve medical handcart's wild-fit nature.
The medical trolley provided by the embodiment can flexibly change the braking and unlocking, and can be quickly locked even if the unlocking part is touched by mistake in the parking state, so that the work and the use of medical staff are not influenced.
It is to be understood that the above examples of the present invention are provided for clarity of illustration only and are not limiting of the embodiments of the present invention. Various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the invention. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the invention are desired to be protected by the following claims.
Claims (10)
1. A cart chassis, comprising:
The device comprises a bottom plate (1) and a central control wheel assembly (2), wherein the central control wheel assembly (2) comprises central control wheels (20) and locking shafts (21) connected between the central control wheels (20), pedals are connected to the locking shafts (21), and the pedals can drive the locking shafts (21) to rotate so as to enable the locking shafts (21) to be locked with the central control wheels (20);
The anti-unlocking mechanism (4) comprises a ratchet wheel (41), a pawl assembly (42) and a driving piece (43), wherein the ratchet wheel (41) is connected with the locking shaft (21), the pawl assembly (42) comprises a fixed seat (421), a pawl (422), a limiting rod (423), a first elastic piece (424), a positioning column (425) and a second elastic piece (426), the fixed seat (421) is fixed on the bottom plate (1), the pawl (422) and the limiting rod (423) are movably arranged on the fixed seat (421), the first elastic piece (424) is positioned between the fixed seat (421) and the pawl (422), the second elastic piece (426) is positioned between the fixed seat (421) and the limiting rod (423), the limiting rod (423) is far away from the ratchet wheel (41), the positioning column (425) is connected with the pawl (422) in a penetrating mode, the positioning column (423) is in clearance fit with the driving piece (422) and the pawl (422) in a clearance fit mode, when the driving piece (43) drives the limiting rod (423) to move, the pawl (422) always has a retreating space relative to the positioning column (425).
2. The cart chassis according to claim 1, wherein the fixed seat (421) comprises a first chute (4211) and a blocking plate (4213), the pawl (422) is slidably disposed in the first chute (4211), the pawl (422) comprises a moving end (4221) and a first protruding end (4222), the moving end (4221) is disposed in the first chute (4211), the first protruding end (4222) protrudes out of the first chute (4211) and faces the ratchet (41), the blocking plate (4213) is used for blocking the first chute (4211), and the first elastic member (424) is abutted between the moving end (4221) and the blocking plate (4213).
3. The trolley chassis according to claim 2, characterized in that the pawl (422) has an insertion portion (4223), the insertion portion (4223) being located at the end of the first protruding end (4222), the insertion portion (4223) being adapted to a gear clearance of the outer periphery of the ratchet wheel (41) such that the pawl (422) cooperates with the ratchet wheel (41) to lock the central control wheel (20).
4. The cart chassis according to claim 1, wherein the fixing base (421) includes a second chute (4212), the limiting rod (423) is slidably disposed in the second chute (4212), the limiting rod (423) includes a pushing end (4231) and a second protruding end (4232), the pushing end (4231) is disposed in the second chute (4212), the second protruding end (4232) protrudes out of the second chute (4212), and the second elastic member (426) is disposed between an inner wall of the second chute (4212) and an end surface of the pushing end (4231) facing the ratchet wheel (41).
5. The cart chassis according to claim 1, wherein one end of the pawl (422) facing the ratchet wheel (41) is provided with a through hole (4224), the limiting rod (423) is correspondingly provided with a positioning hole, the positioning column (425) passes through the through hole (4224) and is locked with the positioning hole, the aperture of the through hole (4224) is larger than the outer diameter of the positioning column (425), and the positioning column (425) is always in clearance with the side surface, close to the ratchet wheel (41), of the through hole (4224), so that the positioning column (425) and the pawl (422) can be in clearance fit.
6. The cart chassis of claim 1, wherein the driver (43) includes a push rod (431), the push rod (431) being capable of selectively pushing the limit rod (423) for movement, the driver (43) having an energized state and a de-energized state, the push rod (431) extending to push the limit rod (423) toward the ratchet wheel (41) when the driver (43) is in the energized state, the push rod (431) retracting away from the limit rod (423) when the driver (43) is in the de-energized state.
7. The cart chassis according to claim 6, wherein the driving member (43) is an electromagnetic latch.
8. The cart chassis according to claim 1, wherein a plurality of said central control wheels (20) are provided, adjacent to said central control wheels (20) on the same side are connected by one said locking shaft (21), said cart chassis further comprising a connecting rod (5), said connecting rod (5) being connected between different said locking shafts (21), said connecting rod (5) enabling a synchronous movement of different said locking shafts (21).
9. The trolley chassis according to claim 1, characterized in that the ratchet wheel (41) is detachably connected with the locking shaft (21).
10. A medical trolley comprising the trolley chassis of any one of claims 1-9, the medical trolley further comprising a mounting frame detachably connected to the trolley chassis, the mounting frame configured to house a medical device or medical cabinet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410217893.9A CN117796923B (en) | 2024-02-28 | 2024-02-28 | Trolley chassis and medical trolley |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410217893.9A CN117796923B (en) | 2024-02-28 | 2024-02-28 | Trolley chassis and medical trolley |
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| Publication Number | Publication Date |
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| CN117796923A CN117796923A (en) | 2024-04-02 |
| CN117796923B true CN117796923B (en) | 2024-05-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202410217893.9A Active CN117796923B (en) | 2024-02-28 | 2024-02-28 | Trolley chassis and medical trolley |
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| CN217374023U (en) * | 2022-05-25 | 2022-09-06 | 苏州康多机器人有限公司 | Brake system and medical treatment operation car |
| DE102023105226A1 (en) * | 2022-03-03 | 2023-09-07 | Wonderland Switzerland Ag | WHEEL BRAKE MECHANISM, FRAME AND CHILD CARRIER |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| GB201909220D0 (en) * | 2019-06-27 | 2019-08-14 | Loadhog Ltd | Brake operating arrangement |
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| CN205706805U (en) * | 2015-03-27 | 2016-11-23 | 婴儿推车科技有限公司 | Brake mechanism and handcart comprising same |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN117796923A (en) | 2024-04-02 |
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