CN115626045A - Electronic heavily block battery box locking means assembly - Google Patents

Electronic heavily block battery box locking means assembly Download PDF

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Publication number
CN115626045A
CN115626045A CN202211300696.0A CN202211300696A CN115626045A CN 115626045 A CN115626045 A CN 115626045A CN 202211300696 A CN202211300696 A CN 202211300696A CN 115626045 A CN115626045 A CN 115626045A
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CN
China
Prior art keywords
rod
locking
pawl
lock
battery box
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Granted
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CN202211300696.0A
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Chinese (zh)
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CN115626045B (en
Inventor
王加斌
左国钧
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Jiangsu Zhongru Metal Technology Co ltd
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Jiangsu Zhongru Metal Technology Co ltd
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Priority to CN202211300696.0A priority Critical patent/CN115626045B/en
Publication of CN115626045A publication Critical patent/CN115626045A/en
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Publication of CN115626045B publication Critical patent/CN115626045B/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60KARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K1/00Arrangement or mounting of electrical propulsion units
    • B60K1/04Arrangement or mounting of electrical propulsion units of the electric storage means for propulsion
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/80Exchanging energy storage elements, e.g. removable batteries
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60KARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K1/00Arrangement or mounting of electrical propulsion units
    • B60K1/04Arrangement or mounting of electrical propulsion units of the electric storage means for propulsion
    • B60K2001/0455Removal or replacement of the energy storages
    • B60K2001/0466Removal or replacement of the energy storages from above
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2200/00Type of vehicles
    • B60L2200/36Vehicles designed to transport cargo, e.g. trucks

Abstract

The invention discloses a locking device assembly of a battery box of an electric heavy truck, which comprises a battery bracket, a supporting block and a locking device, wherein the battery bracket is welded on the electric heavy truck, the supporting block is fixed on a peripheral frame body of the battery box, the locking device is arranged on the inner side of the battery bracket, the locking device comprises a turnover part, a driving part and a ratchet wheel part, the turnover part comprises a lock rod and a pressing block and can be self-locked, the locking force required at a rotating shaft is small, the driving part is an air cylinder and drives the turnover part to realize locking and unlocking; the ratchet mechanism is used for mechanically locking the lock rod to form a second locking guarantee. The device has the advantages that the locking surfaces can be tightly attached, the device can adapt to the shape and position errors of equipment, and the battery box is prevented from shaking caused by gaps; only one cylinder can drive the two mechanisms to act sequentially, so that the cost is saved; the mechanism has a self-locking function, and can close the power of the cylinder after fastening, so that energy is saved; the ratchet wheel rotating shaft needs small locking force, and double locking guarantees higher safety.

Description

Electronic heavily block battery box locking means assembly
Technical Field
The invention belongs to the technical field of replacement of batteries of heavy trucks, and particularly relates to a locking device assembly of a battery box of an electric heavy truck replacement battery.
Background
At present, in the electric heavy truck, a battery bin is replaced by a battery replacing mode so as to quickly supplement battery energy. The battery replacement is also divided into a plurality of modes, at present, the top replacement is mainly used, and the specific operation steps are as follows: firstly, a truck drives into a charging station in a special battery replacement station, hoisting equipment hoists away a battery compartment with insufficient power, then hoists the battery compartment with full power onto the truck, and then a locking device is needed to fix the battery compartment and a bracket below the battery compartment.
The existing battery compartment locking device for the electric heavy truck has various types, for example, a battery compartment locking structure disclosed in a patent with the publication number of CN 216915503U, and a common cylinder 4 is used for directly pushing a pressing part 2 to turn over so as to realize a locking or unlocking state. And set up spring 7 between cylinder 4 output and pressing piece 2, keep the locking station through the elasticity of spring 7, form the auto-lock under the locking state to pressing piece 2 promptly.
Although the battery box locking structure in the prior art can realize the locking and self-locking functions of the battery box, the battery box locking structure also has defects. Wherein, the self-locking structure is realized by directly adopting the spring 7. The spring has the defects that the spring is easy to bend when encountering transverse external force and cannot keep axial stability, the spring is directly used as a middle rigid part to be connected with the pressing part 2, the defect is enlarged, the battery box can transmit the external force to the locking structure if the battery box shakes or is out of position when encountering jolt or collision and the like in the driving process of a vehicle, the spring is easy to bend or twist, the locking of the battery box is caused to fail, and potential safety hazards appear.
Therefore, a new technical solution is needed to solve the above problems.
Disclosure of Invention
The purpose of the invention is as follows: the utility model provides an electronic heavily block battery box locking means assembly to solve the problem that bending or distortion hidden danger appear easily as supporting the auto-lock of casting die spare in the self-locking mechanism to locking mechanism that exists among the prior art, further solve the not enough problem of elastic component auto-lock intensity simultaneously.
The technical scheme is as follows: the invention can adopt the following technical scheme:
a battery box locking device assembly of an electric heavy truck comprises a battery bracket, a plurality of locking devices arranged on the battery bracket and a supporting block arranged on a battery box frame; the locking device comprises a mounting plate, a driver arranged on the mounting plate, a locking rod arranged on the battery bracket and a locking device; the locking rod comprises an installation part positioned at the bottom end of the battery bracket, a straight rod part which is bent and extends upwards from one end of the installation part extending to the installation plate, and a locking part which is bent and extends from the top end of the straight rod part to the supporting block; the front end of the locking part is provided with a pressing block matched with the supporting block; when the supporting block and the pressing block are contacted with each other, the contact area is a pressing surface; a lock rod mounting frame is arranged below the battery bracket, and the bottom end of the lock rod is hinged to the lock rod mounting frame through a lock rod turnover shaft; the center of the rotating shaft of the lock rod turnover shaft is positioned outside the normal line of the pressing surface; the output end of the driver is coaxially connected with a push rod, two stop levers are arranged on the outer side of the push rod, a straight lever part of the lock lever is positioned between the two stop levers, and the distance between the two stop levers is greater than the width of the straight lever part; when the push rod is pushed outwards, the pressing block of the lock rod is locked with the supporting block, and when the push rod retracts, the pressing block of the lock rod is separated from the supporting block for unlocking;
the locking device comprises a ratchet wheel, a pawl and a shifting lever, wherein the ratchet wheel is arranged on the lock rod turnover shaft and mutually fixed with the installation part of the lock rod; the bottom end of the pawl is matched with the ratchet wheel, and the top end of the pawl is hinged to the battery box frame or the bottom of the mounting rack through the pawl rotating shaft seat; an extension rod extends upwards from the top end of the pawl; the bottom of the shifting lever is hinged on the mounting plate through a shifting lever rotating shaft seat; a longitudinal groove is formed in the upper part of the shifting lever, which is positioned at the hinged position of the shifting lever and the shifting lever rotating shaft seat, and a shifting lever head matched with an extension rod of the pawl is arranged at the lower part of the shifting lever, which is positioned at the hinged position of the shifting lever and the shifting lever rotating shaft seat; a cylindrical rod positioned in the groove is arranged on the outer side surface of the push rod; the cylindrical rod slides in the groove to drive the shifting lever to rotate around the shifting lever rotating shaft seat;
when the push rod retracts, the cylindrical rod presses the driving lever downwards to enable the driving lever head to abut against the extension rod of the pawl forwards to enable the pawl and the ratchet wheel to be unlocked, and the stop lever on the outer side of the push rod pulls the lock rod back to enable the pressing block of the lock rod and the supporting block to be separated and unlocked; when the push rod extends forwards, the cylindrical rod lifts the deflector rod downwards to separate the deflector rod head from the extension rod of the pawl, the pawl returns to be matched with the ratchet wheel, and the stop rod on the outer side of the push rod pushes the lock rod forwards to enable the pressing block of the lock rod to press the supporting block to form locking.
Furthermore, a pawl spring is arranged between the pawl and the battery bracket, and the pawl spring provides pre-tightening force for the matching of the pawl and the ratchet wheel.
Furthermore, a lock rod spring is arranged between the straight rod part of the lock rod and the battery bracket, and the lock rod spring provides pre-tightening force for the matching of the pressing block and the supporting block.
Furthermore, the pressing block is hinged to the front end of the locking part.
Furthermore, the mounting plate is provided with an opening for the straight rod part of the lock rod, the extension rod of the pawl and the deflector rod head to pass through.
Further, the driver is an air cylinder.
Has the advantages that: compared with the prior art, the locking rod has self-locking capacity by redesigning the locking rod structure, the rotating shaft of the specific locking rod is positioned at the bottom of the battery bracket frame, and the center of the rotating shaft is positioned outside the normal line of the joint surface, so that the locking rod has self-locking performance, when the locking rod is pressed in place, the locking rod can automatically keep a locking position and cannot be returned and loosened, and the locking rod is pulled more and more tightly by the force of the battery box on the pressing block. The self-locking structure is a rigid structure of the lock rod, is not easy to deform and is slightly influenced by external force. Through this auto-lock structure, driver power can be closed after locking lever and the battery box locking, has practiced thrift electric power, has increased the duration of electronic heavily blocking. Meanwhile, the locking device has double locking guarantee, and a ratchet mechanism is added on the basis of self-locking, so that accidental loosening of the lock catch is prevented, and the safety is further improved; and only one driver is adopted to drive the two mechanisms of the lock rod and the locking device to act successively, so that the structure is simple and the cost is saved.
Drawings
FIG. 1 is a schematic diagram of a battery box locking device assembly of an electric heavy truck according to an embodiment of the present invention;
FIG. 2 is a general assembly view of the embodiment of the present invention in a locked state;
fig. 3 is a schematic structural view of a locking mechanism of a battery box locking device assembly of an electric heavy truck according to an embodiment of the present invention.
FIG. 4 is a schematic view of a portion of a locking mechanism of a battery box locking device assembly of the electric heavy truck according to an embodiment of the present invention;
FIG. 5 is a partial state view of the pawl and ratchet unlocking, lock lever and support block unlocking;
FIG. 6 (a) shows the force applied to the lock lever in the embodiment of the present invention; FIG. 6 (b) is a schematic view showing the action force applied to the lock lever equivalent to the center of the rotation shaft according to the embodiment of the present invention.
In the figure:
1. a battery holder;
2. a quick-change connector;
3. a locking mechanism;
31. a turning part; 311. a lock lever; 312. a locking lever rotating shaft seat; 313. a lock bar turnover shaft; 314. a compressing block rotating shaft; 315. a compression block; 316. a lock lever spring;
32. a drive member; 321. a cylinder; 322. a cylinder support; 323. a cylinder push rod;
33. a ratchet member; 331. a ratchet wheel; 332. a pawl; 333. a pawl spring; 334. a pawl rotating shaft seat; 335. a pawl rotation shaft; 336. a deflector rod rotating shaft seat; 337. a pawl deflector rod;
34. mounting plate
4. A supporting block;
5. a battery box.
Detailed Description
The present invention is described in detail below with reference to specific embodiments, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The examples are intended to assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that, for a person skilled in the art, several modifications or variations can be made to the solution of the present invention without departing from the concept of the invention, and still fall within the scope of the invention.
The present invention is described in detail below with reference to specific embodiments, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The examples are intended to assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that, for a person skilled in the art, several modifications or variations can be made to the solution of the present invention without departing from the concept of the invention, and still fall within the scope of the invention.
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
The embodiment of the invention provides a locking device assembly of a battery box of a power change truck, which is used for reliably locking the battery box on a battery bracket of a truck and ensuring the safety of a driving process.
Referring to fig. 1 to 2, the battery box locking device assembly of the electric heavy truck comprises a battery bracket 1, a locking mechanism 3, a supporting block 4 and a battery box 5, wherein the battery bracket 1 is fixedly connected to the electric heavy truck, and the battery box 5 can be placed on the battery bracket 1; the supporting block 4 for locking joint is fixed on the frame body outside the battery box 5, and welding, bolts or other connection modes can be adopted; the locking device 3 comprises a turning part 31, a driving part 32 and a ratchet wheel part 33, wherein a mounting seat of the turning part 31 is fixedly connected to the bottom of the outer frame of the battery bracket 1 and can adopt welding, bolts or other connection modes; the driving member 32 and the ratchet member 33 are fixed to the mounting plate 34, and the mounting plate 34 is fixed to the inside of the outer frame of the battery carrier 1.
Referring to fig. 1, the number of the locking devices 3 is at least four, and at most eight, and the locking mechanisms 3 are distributed on the peripheral frame of the battery bracket 1 at intervals, so that the upper battery box 5 is reliably and stably locked.
Referring to fig. 2 to 3, the supporting blocks 4 are mounted above the bottom frame square tubes of the battery box 5, and the number of the supporting blocks is consistent with that of the locking mechanisms 3, so as to be used for matching and fastening the battery box. The joint surface of the supporting block 4 is processed into an inclined surface, and a layer of rubber or other flexible materials can be cushioned. When the battery box is locked, the locking rod 311 of the locking mechanism 3 is turned outwards to drive the lower surface of the pressing block 315 to be jointed with the upper inclined surface of the supporting block 4, and after the pressing connection is in place, the supporting block 3 and the pressing block 315 are tightly locked together, so that the battery box is reliably locked. The compact heap 315 can rotate relative to locking lever 311, consequently can adapt to the not co-altitude and the slope on supporting shoe inclined plane, realizes closely laminating, can ignore the processing and the assembly error of part, eliminates the composition surface clearance that exists in the conventional locking scheme, avoids the battery box to produce and rocks at the driving in-process, possesses higher security.
Referring to fig. 3 to 5, the locking mechanism 3 includes a flip member 31, a drive member 32, a mounting plate 34, and a ratchet member 33. The lever pivot 336 of the drive member 32 and the ratchet member 33 is fixed to the mounting plate 34, and the mounting plate 34 is fixed to the inside of the frame of the battery bracket 1. The lock bar of the flip member 31 and the ratchet 331 of the ratchet member 33 are mounted on the same shaft 313, and torque is transmitted through the key, so that when the ratchet 331 is clamped by the pawl 332, locking of the lock bar 311 is completed. The rotating shaft seats of the lock lever 311 and the ratchet 331 are fixed at the bottom of the frame of the battery bracket 1, and can be connected by welding or bolts. Different parts of the ratchet part 33 are installed at different positions, wherein the ratchet 331 is installed on the lock lever rotating shaft 313 and radially restrained by a key; the pawl rotating shaft seat 334 is fixed on the inner side of the battery bracket 1, is positioned below the mounting plate 34 and can be fixed by welding or bolts; the shift lever shaft seat 336 is fixed to the mounting plate 34. The mounting plate 34 is formed by welding a steel plate and angle iron, has high strength and rigidity, and can ensure the structural safety.
Referring to fig. 3 to 5, the reversing member 31 includes a locking lever 311, a pressing block 315, a pressing block rotation shaft 314, a locking lever spring 316, a locking lever rotation shaft 313, and a locking lever rotation shaft holder 312. The lock lever 311 includes a mounting portion 3111 at the bottom of the battery bracket 1, a straight lever portion 3112 extending upward from the mounting portion 3111 to the mounting plate 34, and a locking portion 3113 extending from the top of the straight lever portion 3112 to the support block 4; the front end of the locking part is provided with a pressing block matched with the supporting block; the area of contact when the support block 4 and the hold down block 315 are in contact with each other is a hold down surface.
The driving member 32 includes a cylinder 321, a cylinder support 322, and a cylinder push rod 323, the cylinder is mounted on the mounting plate 34 through a front support and a rear support, and the cylinder push rod 323 is mounted at the front end of the piston rod of the cylinder through a screw thread and locked by a nut. Ratchet mechanism 33 includes ratchet 331, pawl 332, pawl spring 333, pawl pivot seat 334, pawl pivot 335, toggle 337, and toggle pivot seat 336. An extension rod 3321 extends upwards from the top end of the pawl 332; the bottom of the deflector rod 337 is hinged on the mounting plate 34 through a deflector rod rotating shaft seat 336; the upper part of the shifting lever 337 at the hinged position of the shifting lever and the shifting lever rotating shaft seat is provided with a longitudinal groove 3371, and the lower part of the shifting lever 3371 at the hinged position of the shifting lever and the shifting lever rotating shaft seat is provided with a shifting lever head 3372 matched with an extension rod 3321 of the pawl.
Referring to fig. 3, two cylindrical blocking rods 3231 are disposed at one side of the cylinder push rod 323, and the locking rod 311 is clamped in the middle, and the two cylindrical blocking rods 3231 drive the locking rod 311 to turn back and forth, thereby implementing locking and unlocking functions. A spring 316 is installed between the lock lever 311 and the battery bracket 1 to provide a certain pre-tightening locking force to the lock lever 311 and prevent the lock lever 311 from being accidentally retracted. Referring to fig. 4, a thin cylindrical rod 3232 is disposed on the other side of the cylinder push rod 323, and slides in the slot 3371 to rotate the shift rod 337 around the shaft, and then the other end of the shift rod 337 prizes the pawl 332 to rotate around the shaft, so as to unlock and lock the ratchet 331. The ratchet 331 and the lock lever 311 are axially fixed by a flat key on the rotating shaft, so that the lock of the reversing member 31 is secured by the locking of the ratchet mechanism 33. A detent spring 333 is also arranged between the detent 332 and the battery carrier 1 for providing a pre-tightening force to prevent the detent 332 from being accidentally released.
The slope of the inclined plane of the supporting block 4 is smaller, and the locking rod turning shaft 313 is positioned on the outer side of the bottom of the frame body of the battery bracket 1. On the cross section of the device, the center of the rotating shaft of the lock rod turnover shaft 313 is positioned outside the normal line of the pressing surface, so that the turnover mechanism has self-locking performance. When the cylinder 321 is pushed forward to a position, a pretightening force exists between the lock rod 311 and the battery box, so that the lock rod 311 keeps a stress balance static state, and the lock rod cannot retreat and loosen under the action of gravity even after the acting force of the cylinder 321 is removed. In the driving process, the battery box generates a vertical upward impact force and a forward friction force along the joint surface to the lock rod 311 due to bumping, so as to form an upward oblique total external acting force to the lock rod, the external force is equivalent to the lock rod overturning shaft 313, a moment for turning the lock rod 311 outwards can be generated, the moment is balanced with the gravity moment, the lock rod 311 is always in a static state, and the self-locking function of the mechanism is realized. Assuming that the locking force is in an infinite limit state, the direction of the acting force of the battery box on the locking rod 311 is coincident with the normal line of the joint surface, and the center of the rotating shaft of the locking rod overturning shaft 313 is positioned outside the normal line of the joint surface, so that the acting force of the battery box on the locking rod 311 is equivalent to the position of the locking rod overturning shaft 313 to generate an everting moment to balance the moment all the time, so that the locking rod is kept static and has a self-locking function.
Specifically, fig. 6 (a) is a schematic diagram of an actual force situation of the lock rod, and fig. 6 (b) is a schematic diagram of an equivalent acting force to the rotating shaft. The lock rod is subjected to the gravity G, the rotation shaft pulling force F1, the battery box pressure force F2 and the friction force F in total, wherein the battery box pressure force F2 and the friction force F can be equivalent to the acting force F3. In the diagram (a), point k is the lock lever centroid, point o is the pivot center, and point p is the joint surface action point. The force applied to the lock rod is equivalent to the point o of the center of the rotating shaft, namely as shown in the figure (b). Wherein M is g For the moment produced after the equivalent of gravity G, M f3 The battery box locking force F3 is equivalent to the generated moment. Since the center o of the axis of rotation is outside the normal to the joint plane, the moment M f3 Must be clockwise, as opposed to the gravitational moment. After the cylinder pushes the lock rod forward to the position, the lock rod can be tightly pressed on the supporting block of the battery box, and pretightening force, namely F3, is formed between the lock rod and the supporting block. Moment M generated by force F3 when truck is stationary f3 With moment of gravity M g The two moments are equal to each other, and the three acting forces G, F1 and F3 are balanced with each other, so that the mechanism can keep a locking working state after the cylinder is powered off. In the driving process of a truck, the battery box generates upward impact force on the locking device due to bumping, the impact force is superposed on the pretightening force, so that the acting force F2 is increased, the angle between the F3 synthesized with the friction force and the normal line of the joint surface is reduced, and the generated moment M is generated f3 Remaining with the gravitational moment M g Balance is maintained. In the process, in order to adapt to the change of the force F3, the acting force F1 of the rotating shaft on the lock rod is changed in the size and the direction, so that the three forces are still kept in balance. Therefore, the stress state of the lock rod is always kept balanced and is in a static state, so that the device is always kept locked,has good self-locking function. In the limit state, if the impact force is infinite, the force F3 is coincident with the normal of the joint surface, and because the central point o of the rotating shaft is positioned outside the normal, the force F3 can still generate a clockwise moment M f3 So as to balance with the counterclockwise gravity moment and make the lock rod static, therefore, the structural characteristic of the invention makes the locking device have self-locking function.
The specific workings of the invention can be summarized with reference to the drawings of the embodiments and the functional explanations mentioned above: when the truck stops at the battery replacing station, a driver operates a 'battery box unlocking' button, the air valve acts, and a piston rod of the air cylinder 321 drives the push rod 323 at the front end to retract. In the process of retracting the push rod 323, the cylindrical guide post arranged on the side surface of the push rod 323 can slide in the groove of the shift lever 337 to drive the shift lever 337 to rotate, and the shift lever 337 can pry the pawl 332 to rotate around the shaft when rotating, so that the ratchet 331 is released. In the locked state, the lock lever 311 is pressed by the rear pin of the push rod 323 and does not contact the front pin, so that the lock lever 311 is not driven to turn backward at the beginning of the retraction of the cylinder, but is always in the pressed state. When the cylinder 321 retracts to a certain degree, the ratchet mechanism is also completely unlocked, the front gear post of the push rod 323 contacts the lock rod 311 at this time, then the lock rod 311 is driven to turn backwards along with the retraction of the cylinder, the unlocking of the battery box is realized, and then the battery box can be replaced by using a crane.
When the battery box is replaced, the driver operates the "battery box locking" button, the air cylinder 321 pushes forward, and the lock rod 311 turns forward along with the advance of the push rod under the pulling force of the spring 316. After the pressing block 315 is completely pressed against the inclined surface of the supporting block 4, the locking bar 311 is not turned forward. After the rear stop lever of the push rod 323 contacts the lock lever 311, the push force of the cylinder 321 will press the lock lever 311 continuously, so that the locking surface is pressed more tightly. In the process that the lock lever 311 turns forwards, the teeth of the pawl 332 do not block the ratchet 331, so the lock lever 311 can smoothly act to the locking position to complete the locking work of the whole battery box.
Because the device has double locking guarantee of self-locking and ratchet locking, the air cylinder is not required to be always ventilated after the locking is finished, the air pump can be closed, the energy of the electric heavy truck is saved, and the battery endurance is increased.
The foregoing description has described specific embodiments of the present invention. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes and modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention.

Claims (6)

1. A battery box locking device assembly of an electric heavy truck comprises a battery bracket, a plurality of locking devices arranged on the battery bracket and a supporting block arranged on a battery box frame; the locking device is characterized by comprising a mounting plate, a driver arranged on the mounting plate, a locking rod arranged on the battery bracket and a locking device; the locking rod comprises an installation part positioned at the bottom end of the battery bracket, a straight rod part which is bent and extends upwards from one end of the installation part extending to the installation plate, and a locking part which is bent and extends from the top end of the straight rod part to the supporting block; the front end of the locking part is provided with a pressing block matched with the supporting block; when the supporting block and the pressing block are contacted with each other, the contact area is a pressing surface; a lock rod mounting frame is arranged below the battery bracket, and the bottom end of the lock rod is hinged to the lock rod mounting frame through a lock rod turnover shaft; the center of a rotating shaft of the lock rod turnover shaft is positioned outside the normal of the pressing surface; the output end of the driver is coaxially connected with a push rod, two stop rods are arranged on the outer side of the push rod, the straight rod part of the lock rod is positioned between the two stop rods, and the distance between the two stop rods is greater than the width of the straight rod part; when the push rod is pushed outwards, the pressing block and the supporting block of the lock rod are locked, and when the push rod retracts, the pressing block and the supporting block of the lock rod are separated and unlocked;
the locking device comprises a ratchet wheel, a pawl and a shifting lever, wherein the ratchet wheel is arranged on the lock rod turnover shaft and mutually fixed with the installation part of the lock rod; the bottom end of the pawl is matched with the ratchet wheel, and the top end of the pawl is hinged to the battery box frame or the bottom of the mounting rack through the pawl rotating shaft seat; an extension rod extends upwards from the top end of the pawl; the bottom of the deflector rod is hinged on the mounting plate through a deflector rod rotating shaft seat; a longitudinal groove is formed in the upper part of the shifting lever, which is positioned at the hinged position of the shifting lever and the shifting lever rotating shaft seat, and a shifting lever head matched with an extension rod of the pawl is arranged at the lower part of the shifting lever, which is positioned at the hinged position of the shifting lever and the shifting lever rotating shaft seat; a cylindrical rod positioned in the groove is arranged on the outer side surface of the push rod; the shifting lever is driven to rotate around the shifting lever rotating shaft seat by the sliding of the cylindrical rod in the groove;
when the push rod retracts, the cylindrical rod presses the driving lever downwards to enable the driving lever head to abut against the extension rod of the pawl forwards to enable the pawl and the ratchet wheel to be unlocked, and the stop lever on the outer side of the push rod pulls the lock rod back to enable the pressing block of the lock rod and the supporting block to be separated and unlocked; when the push rod extends forwards, the cylindrical rod lifts the deflector rod downwards to separate the deflector rod head from the extension rod of the pawl, the pawl returns to be matched with the ratchet wheel, and the stop rod on the outer side of the push rod pushes the lock rod forwards to enable the pressing block of the lock rod to press the supporting block to form locking.
2. The power unit truck battery box locking assembly of claim 1, further comprising: and a pawl spring is arranged between the pawl and the battery bracket and provides pre-tightening force for the matching of the pawl and the ratchet wheel.
3. The power unit truck battery box locking assembly of claim 1, further comprising: and a locking rod spring is arranged between the straight rod part of the locking rod and the battery bracket, and the locking rod spring provides pretightening force for the matching of the pressing block and the supporting block.
4. The power unit truck battery box locking assembly of claim 1, further comprising: the pressing block is hinged to the front end of the locking part.
5. The power unit battery compartment locking arrangement assembly of any one of claims 1 to 4, wherein: the mounting plate is provided with an opening for the straight rod part of the locking rod, the extension rod of the pawl and the deflector rod head to pass through.
6. The power unit battery compartment locking arrangement assembly of any one of claims 1 to 4, wherein: the driver is an air cylinder.
CN202211300696.0A 2022-10-24 2022-10-24 Locking device assembly of electric heavy-duty truck battery box Active CN115626045B (en)

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CN117134063B (en) * 2023-10-24 2023-12-26 泉州装备制造研究所 Locking mechanism of heavy-duty truck battery box

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