CN215244439U

CN215244439U - Hydraulic locking mechanism of battery replacement system of pure electric heavy truck

Info

Publication number: CN215244439U
Application number: CN202121847062.8U
Authority: CN
Inventors: 唐国平; 彭金平; 章敏; 牛俊; 胡珊
Original assignee: Anhui Hualing Automobile Co Ltd
Current assignee: Anhui Hualing Automobile Co Ltd
Priority date: 2021-08-09
Filing date: 2021-08-09
Publication date: 2021-12-21
Anticipated expiration: 2031-08-09

Abstract

The application discloses a hydraulic locking mechanism of a pure electric heavy truck battery changing system, which relates to the technical field of heavy truck battery changing and comprises a hydraulic lock and an upper lifting lug matched with the hydraulic lock; the hydraulic lock is used for being connected and fixed with a battery replacing base of the pure electric heavy truck and is provided with a main lock hook and an auxiliary lock hook which are matched with each other; the upper lifting lug is used for being connected and fixed with a battery replacing frame of the pure electric heavy truck and is provided with a lock pin which is matched and fixed with the main lock hook and the auxiliary lock hook. The movable bottom limiting part is pressed downwards to rotate downwards through the self gravity of the battery replacing frame, and then the upper lifting lug on the battery replacing frame is locked in the hydraulic lock of the battery replacing base when the main lock hook is matched with the auxiliary lock hook, so that the movable bottom limiting part has the effects of simple structure, wide locking range and obvious reduction of positioning difficulty; meanwhile, the auxiliary locking hook is driven to rotate through the top ejector rod of the hydraulic oil cylinder, so that an unlocking effect is achieved after the main locking hook rotates, and the situation that the hydraulic locking mechanism is opened due to the fact that the battery replacing frame deforms is avoided.

Description

Hydraulic locking mechanism of battery replacement system of pure electric heavy truck

Technical Field

The application relates to the technical field of replacement of batteries by heavy trucks, in particular to a hydraulic locking mechanism of a battery replacement system of a pure electric heavy truck.

Background

At present, in the field of replacing batteries of electric heavy trucks, a battery box of the heavy truck adopts a structure capable of being replaced quickly, so that the quick and effective replacement of the battery box can be completed in a special replacing station. In the battery replacement process, the battery replacement box takes down the discharged battery box under the action of the special battery replacement device, and places the battery box on the charging station, and then loads the battery box full of charges on the charging station onto the electric heavy truck. Therefore, the container is hoisted and taken down under the action of the special hoisting clamp, and the battery box replacement operation in a short time is completed.

However, since the battery box is hoisted in the battery replacing process, and in the prior art, the hoisting clamp is hoisted by a winding steel cable to move up and down, the horizontal precision of the hoisting clamp is difficult to realize high-precision positioning, so that the positioning in the battery box placing process is difficult, and after the battery box is locked and fixed, the battery box and the battery box base deform along with the long-time operation of the battery replacing vehicle, so that the installation stability of the battery box is reduced, the circuit connection safety between the battery box and the heavy truck driving safety are influenced, and improvement is needed.

SUMMERY OF THE UTILITY MODEL

In view of this, the present application aims to provide a hydraulic locking mechanism of a pure electric heavy truck battery replacement system, so as to achieve the purpose of improving locking stability and safety. The specific scheme is as follows:

a hydraulic locking mechanism of a battery replacement system of a pure electric heavy truck comprises a hydraulic lock and an upper lifting lug matched with the hydraulic lock;

the hydraulic lock is used for being connected and fixed with a battery replacing base of the pure electric heavy truck and is provided with a main lock hook and an auxiliary lock hook which are matched with each other;

the upper lifting lug is used for being connected and fixed with a battery replacing frame of the pure electric heavy truck and is provided with a lock pin which is matched and fixed with the main lock hook and the auxiliary lock hook.

Preferably: the main lock hook is provided with a top limiting part, a bottom limiting part and a locking groove located between the top limiting part and the bottom limiting part, and the locking groove is matched with the lock pin and used for the lock pin to be inserted and locked.

Preferably: the auxiliary lock hook is provided with an abutting driving portion and an abutting locking portion, a hydraulic oil cylinder used for abutting against the lower side of the abutting driving portion and driving the auxiliary lock hook to rotate is arranged in the hydraulic lock, and the bottom of the abutting locking portion is used for abutting against the upper side of the bottom limiting portion so as to limit the lock pin in the locking groove.

Preferably: the auxiliary lock hook is provided with an auxiliary lock shaft used for circumferential rotation, the auxiliary lock shaft is sleeved with a primary torsion spring, and the primary torsion spring is used for driving the bottom of the abutting locking part to abut against a top ejector rod of the hydraulic oil cylinder; the main lock hook is provided with a main lock shaft used for circumferential rotation, the main lock shaft is sleeved with a secondary torsion spring, and the secondary torsion spring is used for driving the bottom limiting part to rotate upwards by taking the main lock shaft as an axis.

Preferably: the hydraulic lock is provided with a fixed abutting frame, the hydraulic oil cylinder is installed and fixed on the fixed abutting frame, the first-stage torsion spring abuts against the fixed abutting frame, and downward rotating acting force is applied to the abutting driving portion.

Preferably: the hydraulic lock is provided with a primary return sensor and a secondary return sensor, and the primary return sensor is matched with the auxiliary lock hook and used for detecting the return state of the top ejector rod of the hydraulic oil cylinder; and the secondary return sensor is matched with the main lock hook and is used for detecting the locking state of the bottom limiting part.

Preferably: the hydraulic oil cylinder is connected with an oil pipe, the oil pipe is connected with a multi-way valve block, and the multi-way valve block is connected with a power unit.

Preferably: the power unit comprises an electromagnetic directional valve connected with the multi-way valve block, a manual-automatic oil pump connected with the electromagnetic directional valve and a manual oil pump knob installed on the manual-automatic oil pump, and the manual-automatic oil pump is further connected with an oil pump starting button.

Preferably: the manual-automatic integrated oil pump is used for automatically starting and stopping the power unit; the oil pump starting button is used for manually starting and stopping the power unit; and the manual oil pump knob is used for starting and stopping the power unit in an emergency.

Preferably: the manual-automatic integrated oil pump supplies oil to the hydraulic oil cylinder when being started so as to drive a top ejector rod of the hydraulic oil cylinder to extend upwards and push the abutting driving part to rotate upwards, push the abutting locking part to rotate downwards, and drive the auxiliary locking hook and the main locking hook to be separated from each other, so that the main locking hook rotates under the acting force of the secondary torsion spring and drives the bottom limiting part to rotate upwards; the oil pump starting button supplies oil to the hydraulic oil cylinder when being pressed and started; and when the manual oil pump knob is driven to rotate, the manual-automatic oil pump supplies oil to the hydraulic oil cylinder.

According to the scheme, the hydraulic locking mechanism of the battery replacing system of the pure electric heavy truck has the following beneficial effects:

1. the movable bottom limiting part is pressed downwards by the self gravity of the battery replacing frame to rotate downwards, and then the upper lifting lug on the battery replacing frame is locked in the hydraulic lock of the battery replacing base when the main lock hook is matched with the auxiliary lock hook, so that the battery replacing frame has the effects of simple structure, wide locking range and obvious reduction of positioning difficulty;

2. the acting force generated by the relative displacement formed between the battery replacing base and the battery replacing frame during the running of the heavy truck is transmitted to the positions of the main lock hook and the auxiliary lock hook for locking the upper lifting lug, so that the acting force is prevented from acting on the movable positions of the main lock hook and the auxiliary lock hook, the service lives of the main lock hook and the auxiliary lock hook are prolonged, and the damage to the main lock hook and the auxiliary lock hook is avoided;

3. the top ejector rod of the hydraulic oil cylinder drives the auxiliary locking hook to rotate, so that the unlocking effect is realized after the main locking hook rotates, and the influence on the normal opening of the hydraulic locking mechanism due to the deformation of the battery replacing frame is avoided.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

FIG. 1 is a system diagram of a hydraulic locking mechanism as disclosed herein;

FIG. 2 is a schematic diagram of the mechanism of the hydraulic lock disclosed herein;

FIG. 3 is a schematic structural view of an upper shackle disclosed herein;

FIG. 4 is a schematic structural diagram of a solenoid directional valve as disclosed herein;

FIG. 5 is a schematic view of a connection structure of a hydraulic lock and a battery replacement base disclosed in the present application;

fig. 6 is a schematic view of a connection structure of an upper lifting lug and a battery replacement frame disclosed in the present application.

Description of reference numerals: 1. hydraulic locking; 101. a primary latch hook; 1011. a top limit part; 1012. a locking groove; 1013. a bottom limit portion; 102. a secondary latch hook; 1021. an abutting driving part; 1022. an abutting locking part; 103. a hydraulic cylinder; 1031. fixing the abutting frame; 104. a primary torsion spring; 1041. an auxiliary lock shaft; 105. a first return sensor; 106. a secondary torsion spring; 1061. a main lock shaft; 107. a secondary return sensor; 2. an upper lifting lug; 201. a lock pin; 3. an oil pipe; 4. a multi-way valve block; 5. a power unit; 501. an electromagnetic directional valve; 502. a manual-automatic integrated oil pump; 503. an oil pump start button; 504. a manual oil pump knob; 6. a battery replacement base; 7. and a battery replacement frame.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

As shown in figure 1, the hydraulic locking mechanism of the pure electric heavy truck battery replacement system comprises a hydraulic lock 1 and an upper lifting lug 2 matched with the hydraulic lock 1. The hydraulic lock 1 is used for being connected and fixed with a battery replacing base 6 of the pure electric heavy truck, as shown in fig. 2 and 5, and is provided with a main lock hook 101 and an auxiliary lock hook 102 which are matched with each other. The upper lifting lug 2 is used for being connected and fixed with a battery replacing battery frame 7 of the pure electric heavy truck, see fig. 3 and fig. 6, and is provided with a locking pin 201 which is matched and fixed with the main locking hook 101 and the auxiliary locking hook 102.

It should be noted that the main lock hook 101 is provided with a top stopper 1011, a bottom stopper 1013, and a lock groove 1012 between the top stopper 1011 and the bottom stopper 1013. The locking groove 1012 mates with the locking pin 201 and allows the locking pin 201 to be inserted and locked. The sub-hook 102 is provided with an abutment driving portion 1021 and an abutment locking portion 1022. The hydraulic lock 1 is provided with a hydraulic cylinder 103 which abuts against the lower side of the abutting driving part 1021 and drives the sub-latch hook 102 to pivot. The bottom of the abutment locking portion 1022 is adapted to abut against the upper side of the bottom stop 1013 to define the lock pin 201 within the lock slot 1012.

As shown in fig. 2, the auxiliary lock hook 102 is provided with an auxiliary lock shaft 1041 for circumferential rotation. The auxiliary lock shaft 1041 is sleeved with a first-stage torsion spring 104, and the first-stage torsion spring 104 is used for driving the bottom of the abutting locking part 1022 to abut against a top mandril of the hydraulic oil cylinder 103. The primary lock hook 101 is provided with a primary lock shaft 1061 for circumferential rotation. The main lock shaft 1061 is sleeved with a secondary torsion spring 106, and the secondary torsion spring 106 is used for driving the bottom stopper 1013 to rotate upward around the main lock shaft 1061.

Meanwhile, the hydraulic lock 1 is provided with a fixed abutment shelf 1031. The hydraulic cylinder 103 is fixed to the fixed abutment frame 1031. The end of the primary torsion spring 104 abuts against the fixed abutment frame 1031, and the upper end abuts against the top of the abutment driving section 1021, and applies a downward rotational urging force to the abutment driving section 1021.

Therefore, when the hydraulic locking mechanism of the pure electric heavy truck battery replacement system is matched and locked, the battery replacement battery frame 7 moves towards the base of the battery replacement base 6, and when the battery replacement base 6 is kept fixed, the upper lifting lug 2 on the battery replacement battery frame 7 gradually approaches the corresponding hydraulic lock 1. At this time, the top ejector rod of the hydraulic cylinder 103 is contracted, the abutting driving part 1021 is positioned at the lowest end under the action of the first-stage torsion spring 104, and the abutting locking part 1022 is positioned at the highest end; the top limit part 1011 and the bottom limit part 1013 are both located at the uppermost end under the action of the secondary torsion spring 106, and further when the lock pin 201 is inserted between the main hook 101 and the auxiliary hook 102, the lock pin 201 first abuts against the bottom limit part 1013, and in the process that the upper lifting lug 2 continues to descend, the bottom limit part 1013 and the top limit part 1011 rotate downwards, and gradually move into the locking groove 1012 formed between the top limit part 1011, the bottom limit part 1013 and the auxiliary hook 102, so that after the lower end of the abutting lock part 1022 and the upper end of the bottom limit part 1013 are abutted and fixed, the locking of the locking mechanism and the matching and fixing of the upper lifting lug 2 are realized.

When the hydraulic locking mechanism of the pure electric heavy-duty truck battery replacement system is opened and the hydraulic lock 1 is separated from the upper lifting lug 2, the top ejector rod of the hydraulic oil cylinder 103 extends upwards, and after the abutting driving part 1021 is pushed to rotate upwards, the abutting locking part 1022 rotates downwards, the abutting contact surfaces of the auxiliary locking hook 102 and the main locking hook 101 are separated from each other, so that the effective separation of the auxiliary locking hook 102 and the main locking hook 101 is completed under the action of the secondary torsion spring 106, and the upper lifting lug 2 is conveniently taken out of the hydraulic lock 1.

As shown in fig. 1 and 2, the hydraulic lock 1 is provided with a primary return sensor 105 and a secondary return sensor 107. A primary return sensor 105 is matched with the secondary latch hook 102 and is used to detect the reset state of the top ram of the hydraulic cylinder 103. The secondary return sensor 107 is matched with the main hook 101 and is used to detect the locked state of the bottom stopper 1013. In this embodiment, the battery replacement base 6 is provided with four hydraulic locks 1 respectively located at corresponding corners, and the battery replacement frame 7 is provided with four upper lifting lugs 2 respectively matched with the corresponding hydraulic locks 1, so that when the hydraulic locks 1 and the upper lifting lugs 2 are matched and locked, the connection stability of the battery replacement frame 7 and the battery replacement base 6 is improved.

As shown in fig. 1 and 3, the hydraulic cylinder 103 is connected to an oil pipe 3. The oil pipe 3 is connected with a multi-way valve block 4, and the multi-way valve block 4 is connected with a power unit 5. The output end of the multi-way valve block 4 is connected with the hydraulic oil cylinders 103 in the four hydraulic locks 1, and the input end of the multi-way valve block is connected with the power unit 5. The power unit 5 includes a solenoid directional valve 501 connected to the multi-way valve block 4, a manual-automatic oil pump 502 connected to the solenoid directional valve 501, and a manual oil pump knob 504 attached to the manual-automatic oil pump 502. The manual-automatic oil pump 502 is also connected with an oil pump start button 503. The manual-automatic integrated oil pump 502 is used for automatically starting and stopping the power unit 5; the oil pump start button 503 is used for manually starting and stopping the power unit 5; the manual oil pump knob 504 is used for emergency start-stop of the power unit 5. When the hydraulic locking mechanism of the battery replacement system of the pure electric heavy truck is unlocked, the battery replacement system is realized by adopting an automatic mode, a manual mode or an emergency mode. In the automatic mode, the manual-automatic oil pump 502 supplies oil to the hydraulic cylinder 103 when being started, so as to drive the top ejector rod of the hydraulic cylinder 103 to extend upwards and push the abutting driving part 1021 to rotate upwards, push the abutting locking part 1022 to rotate downwards, and after the auxiliary locking hook 102 and the main locking hook 101 are driven to be separated from each other, the main locking hook 101 rotates under the acting force of the secondary torsion spring 106 and drives the bottom limiting part 1013 to rotate upwards. In the manual mode, the oil pump start button 503 supplies oil to the hydraulic cylinder 103 when being pressed to start, so as to drive the top rod of the hydraulic cylinder 103 to extend upwards and push the abutting driving part 1021 to rotate upwards, push the abutting locking part 1022 to rotate downwards, and after the auxiliary locking hook 102 and the main locking hook 101 are driven to disengage from each other, the main locking hook 101 rotates under the acting force of the secondary torsion spring 106, and makes the bottom limiting part 1013 rotate upwards. In the emergency mode, the manual oil pump knob 504, when driven to rotate, causes the manual-automatic oil pump 502 to supply oil to the hydraulic cylinder 103, so as to drive the top rod of the hydraulic cylinder 103 to extend upward and push the abutting driving part 1021 to rotate upward, push the abutting locking part 1022 to rotate downward, and after the driving auxiliary locking hook 102 and the main locking hook 101 are disengaged from each other, the main locking hook 101 rotates under the action of the secondary torsion spring 106, and causes the bottom limiting part 1013 to rotate upward.

In conclusion, the bottom limiting part 1013 is pressed downwards to rotate downwards by the self gravity of the battery replacing frame 7, and then the upper lifting lug 2 on the battery replacing frame 7 is locked in the hydraulic lock 1 of the battery replacing base 6 when the main lock hook 101 is matched with the auxiliary lock hook 102, so that the battery replacing device has the advantages of simple structure, wide locking range and obvious positioning difficulty reducing effect. Meanwhile, the acting force generated by the relative displacement formed between the electricity replacing base 6 and the electricity replacing battery frame 7 during heavy truck driving is transmitted to the positions of the main lock hook 101 and the auxiliary lock hook 102 for locking the upper lifting lug 2, so that the acting force on the movable positions of the main lock hook 101 and the auxiliary lock hook 102 is avoided, the service lives of the main lock hook 101 and the auxiliary lock hook 102 are prolonged, and the damage to the main lock hook 101 and the auxiliary lock hook 102 is avoided. In order to avoid the influence on the normal opening of the hydraulic locking mechanism due to the deformation of the battery replacing frame 7, the top ejector rod of the hydraulic oil cylinder 103 drives the auxiliary locking hook 102 to rotate, and then the unlocking effect is realized after the main locking hook 101 rotates.

References in this application to "first," "second," "third," "fourth," etc., if any, are intended to distinguish between similar elements and not necessarily to describe a particular order or sequence. It will be appreciated that the data so used may be interchanged under appropriate circumstances such that the embodiments described herein may be practiced otherwise than as specifically illustrated or described herein. Furthermore, the terms "comprises" and "comprising," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, or apparatus.

It should be noted that the descriptions in this application referring to "first", "second", etc. are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present application.

The principle and the implementation of the present application are explained herein by applying specific examples, and the above description of the embodiments is only used to help understand the method and the core idea of the present application; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.

Claims

1. The utility model provides a electricelectric moves heavily card and trades electric system hydraulic pressure locking mechanism which characterized in that: the lifting device comprises a hydraulic lock (1) and an upper lifting lug (2) matched with the hydraulic lock (1);

the hydraulic lock (1) is used for being connected and fixed with a battery replacing base (6) of the pure electric heavy truck and is provided with a main lock hook (101) and an auxiliary lock hook (102) which are matched with each other;

the upper lifting lug (2) is used for being connected and fixed with a battery replacing frame (7) of the pure electric heavy truck and is provided with a lock pin (201) which is matched and fixed with the main lock hook (101) and the auxiliary lock hook (102).

2. The hydraulic locking mechanism of a pure electric heavy truck battery replacement system according to claim 1, characterized in that: the main lock hook (101) is provided with a top limit part (1011), a bottom limit part (1013) and a locking groove (1012) positioned between the top limit part (1011) and the bottom limit part (1013), and the locking groove (1012) is matched with the lock pin (201) and used for inserting and locking the lock pin (201).

3. The hydraulic locking mechanism of a pure electric heavy truck battery replacement system according to claim 2, characterized in that: the auxiliary locking hook (102) is provided with an abutting driving part (1021) and an abutting locking part (1022), a hydraulic oil cylinder (103) which is used for abutting against the lower side of the abutting driving part (1021) and driving the auxiliary locking hook (102) to rotate is arranged in the hydraulic lock (1), and the bottom of the abutting locking part (1022) is used for abutting against the upper side of the bottom limiting part (1013) so as to limit the lock pin (201) in the locking groove (1012).

4. The hydraulic locking mechanism of a pure electric heavy truck battery replacement system according to claim 3, characterized in that: the auxiliary lock hook (102) is provided with an auxiliary lock shaft (1041) used for rotating in the circumferential direction, the auxiliary lock shaft (1041) is sleeved with a primary torsion spring (104), and the primary torsion spring (104) is used for driving the bottom of the abutting locking part (1022) to abut against a top ejector rod of the hydraulic oil cylinder (103); the main lock hook (101) is provided with a main lock shaft (1061) used for rotating in the circumferential direction, the main lock shaft (1061) is sleeved with a secondary torsion spring (106), and the secondary torsion spring (106) is used for driving the bottom limiting part (1013) to rotate upwards by taking the main lock shaft (1061) as an axis.

5. The hydraulic locking mechanism of a pure electric heavy truck battery replacement system according to claim 4, characterized in that: the hydraulic lock (1) is provided with a fixed abutting frame (1031), the hydraulic oil cylinder (103) is installed and fixed on the fixed abutting frame (1031), and the primary torsion spring (104) abuts against the fixed abutting frame (1031) and applies downward rotating acting force to the abutting driving part (1021).

6. The hydraulic locking mechanism of a pure electric heavy truck battery replacement system according to claim 4, characterized in that: the hydraulic lock (1) is provided with a primary return sensor (105) and a secondary return sensor (107), wherein the primary return sensor (105) is matched with the auxiliary lock hook (102) and is used for detecting the return state of a top ejector rod of the hydraulic oil cylinder (103); the secondary return sensor (107) is matched with the main lock hook (101) and is used for detecting the locking state of the bottom limit part (1013).

7. The hydraulic locking mechanism of a pure electric heavy truck battery replacement system according to claim 4, characterized in that: the hydraulic oil cylinder (103) is connected with an oil pipe (3), the oil pipe (3) is connected with a multi-way valve block (4), and the multi-way valve block (4) is connected with a power unit (5).

8. The hydraulic locking mechanism of a pure electric heavy truck battery replacement system according to claim 7, characterized in that: the power unit (5) comprises an electromagnetic directional valve (501) connected with the multi-way valve block (4), a manual-automatic oil pump (502) connected with the electromagnetic directional valve (501) and a manual oil pump knob (504) installed on the manual-automatic oil pump (502), and the manual-automatic oil pump (502) is further connected with an oil pump starting button (503).

9. The hydraulic locking mechanism for pure electric heavy truck battery replacement system according to claim 8, characterized in that: the manual-automatic integrated oil pump (502) is used for automatically starting and stopping the power unit (5); the oil pump starting button (503) is used for manually starting and stopping the power unit (5); the manual oil pump knob (504) is used for starting and stopping the power unit (5) in an emergency.

10. The hydraulic locking mechanism of a pure electric heavy truck battery replacement system according to claim 9, characterized in that: the manual-automatic integrated oil pump (502) supplies oil to the hydraulic oil cylinder (103) when being started, so that a top ejector rod of the hydraulic oil cylinder (103) is driven to extend upwards and push the abutting driving part (1021) to rotate upwards, the abutting locking part (1022) is pushed to rotate downwards, and after the auxiliary locking hook (102) and the main locking hook (101) are driven to be separated from each other, the main locking hook (101) rotates under the action force of the secondary torsion spring (106), and the bottom limiting part (1013) rotates upwards; the oil pump starting button (503) supplies oil to the hydraulic oil cylinder (103) when being pressed and started; and when the manual oil pump knob (504) is driven to rotate, the manual-automatic oil pump (502) supplies oil to the hydraulic oil cylinder (103).