A self-locking underwire compression device

Abstract

The application relates to the technical field of vehicle locking devices, in particular to a bottom support self-locking pressing device which comprises a pressing component, a pushing mechanism and a fixed part. The pressing component comprises a rotating part and a pressing part, and the pressing component comprises a recovery state and a pressing state. In the pressing state, the pressing part extends through an extension opening, and the lower side of the pressing part can abut against the fixed part. The pushing mechanism comprises a driver and a pushing piece. The pushing piece comprises a pushing part, the driver can drive the pushing part to move along the extension direction of the extension opening, the pushing part can push the rotating part to rotate, the pushing piece further comprises a wedge-shaped part, the pressing part comprises a body block and a pressing block, the upper side of the pressing block is provided with a fitting surface, the wedge-shaped part can abut against the fitting surface, and a first interval distance is arranged between the center of the pressing block and the hinge point of the rotating part along the width direction of the rotating part. Thus, the problem that the existing battery locking mechanism is easily opened by the reaction force and is unstable during locking is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicle locking device, in particular to a bottom support self-locking pressing device. BACKGROUND

[0002] Nowadays, the new energy electric vehicle develops rapidly, but the battery supplement is an important problem to curb its development, among which, the battery replacement is a scheme that can quickly supplement the vehicle, which is strong in operability, convenient and fast. For the detachable battery, the fixing and locking of the battery pack and the vehicle are crucial to the safe driving of the vehicle.

[0003] The existing battery pack fixing lock usually uses a locking mechanism to press the fixed part of the battery pack on the frame, thereby completing the pressing and fixing operation. However, due to the large mass of the battery pack, a large force is usually required to stably fix it, and therefore, the driving force of the locking structure is usually large. However, the large driving force also causes the locking structure to easily pop out when it contacts the locked part due to the impact of the contact moment, which not only causes unstable locking, but also easily causes damage to the locking structure. SUMMARY

[0004] To solve the problem of the existing battery locking mechanism being easily popped out by the reaction force and unstable locking during locking, the present application provides a bottom support self-locking pressing device, which comprises a pushing mechanism, a pressing member and a shell. The shell has an accommodating space inside, and the shell is provided with an extension opening communicating with the accommodating space. The pressing member is L-shaped and comprises a rotating part and a pressing part. The first end of the rotating part is hinged to the inside of the shell, and the pressing part is arranged at the second end of the rotating part and extends away from the rotating part. The pressing part can extend out of the shell through the extension opening. The pressing member comprises a recovery state and a pressing state. In the recovery state, the pressing member is located inside the shell, and in the pressing state, the pressing part extends out through the extension opening and the lower side of the pressing part can abut on the fixed part. The pushing mechanism comprises a driver and a pushing part. The pushing part comprises a pushing part, and the driver can drive the pushing part to move along the extension direction of the extension opening. The pushing part can push the rotating part to rotate, so that the pressing member can be switched between the recovery state and the pressing state. The pushing part further comprises a wedge-shaped part. The pressing part comprises a body block and a pressing block arranged away from the rotating part. The upper side of the pressing block is provided with a fitting surface, and the wedge-shaped part can abut on the fitting surface. The center of the pressing block and the hinge point of the rotating part are provided with a first interval distance along the width direction of the rotating part.

[0005] In some embodiments, the upper top surface of the pressing block is protruded from the upper top surface of the body block.

[0006] In some embodiments, the body block is provided with a first recess, the compression block is hinged in the first recess, the top of the compression block protrudes from the opening of the first recess, the top of the compression block comprises an extension structure extending in the width direction, a space is provided between the extension structure and the first recess, and the width of the top of the compression block is greater than the width of the first recess.

[0007] In some embodiments, the compression member further comprises an abutting block for abutting against the fixed member, the abutting block is provided on the side of the body block facing the fixed member, and the abutting block protrudes from the body block; in the compression state, the vertical distance between the lower side of the abutting block and the fitting surface is L1, the vertical distance between the fitting surface and the fixed member is L2, and L1>L2.

[0008] In some embodiments, the body block is further provided with a second recess, the abutting block is hinged in the second recess, the lower side of the abutting block protrudes from the opening of the second recess, the lower side of the abutting block extends in the width direction thereof and a space is provided between the lower side of the abutting block and the second recess, and the width of the lower side of the abutting block is greater than the width of the second recess.

[0009] In some embodiments, a support plate extending in the horizontal direction is fixedly arranged in the shell, the upper side of the wedge-shaped part is fitted with the lower side of the support plate, and the wedge-shaped part can move along the extension direction of the support plate.

[0010] In some embodiments, the lower side of the wedge-shaped part is arranged to gradually move away from the support plate in the direction away from the outlet, and the maximum distance between the lower side of the support plate and the support plate is greater than the interval distance between the upper side of the compression block and the support plate.

[0011] In some embodiments, the distance between the hinge point of the rotating part and the shell and the center of rotation of the compression block is L3, the distance between the hinge point of the rotating part and the shell and the center of rotation of the abutting block is L4, and 0.7

[0012] In some embodiments, the driver comprises a driving cylinder connected with the pushing member, and the driving end of the driving cylinder can move in the horizontal direction.

[0013] In some embodiments, the driver further comprises a resilient member, the first end of the resilient member is connected with the compression member, the second end of the resilient member is connected with the shell, and the resilient member is in a stretched state.

[0014] To solve the problem that the existing battery locking mechanism is easily opened by the reaction force and unstable when locked, the present application has the following advantages:

[0015] In the above technical solution, the pushing member of the pushing mechanism pushes the compression member to rotate, so that the compression member can extend out of the opening on the shell, and the compression member can be converted from the recovery state to the compression state and abut against the fixed member. In the compression state, the compression member can continuously apply a force towards the fixed member by the pushing force of the pushing mechanism, so as to achieve the purpose of fixing the fixed member. At the same time, since the compression member can rotate along the hinge point, when the force is converted from the driving force to the static force, the compression member will rebound due to the impact of the force conversion, which will make the locking unstable. In the above technical solution, the fitting state between the wedge-shaped part of the pushing mechanism and the compression block, and the first interval distance between the center of the compression block and the hinge point of the rotating part along the width direction of the rotating part are provided, so that the force between the wedge-shaped block and the compression block forms a force moment opposite to the rebound force, and the action direction of the force moment is not the driving direction of the driver. At this time, the force of the force moment comes from the structural strength of the wedge-shaped part, so that the rebound can be prevented, and the locking is more stable. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 A structure schematic diagram of a bottom support self-locking compression device is shown.

[0017] Figure 2 A structure schematic diagram of a bottom support self-locking compression device installed on a vehicle body is shown.

[0018] Figure 3 A structure schematic diagram of a bottom support self-locking compression device is shown.

[0019] Figure 4 A structure schematic diagram of a bottom support self-locking compression device in a recovery state is shown.

[0020] Figure 5 A structure schematic diagram of a bottom support self-locking compression device in a first intermediate state during conversion from a recovery state to a compression state is shown.

[0021] Figure 6 A structure schematic diagram of a bottom support self-locking compression device in a second intermediate state during conversion from a recovery state to a compression state is shown.

[0022] Figure 7 A structure schematic diagram of a bottom support self-locking compression device in a third intermediate state during conversion from a recovery state to a compression state is shown.

[0023] Figure 8 A structure schematic diagram of a bottom support self-locking compression device in a compression state is shown.

[0024] 10 - pushing mechanism; 11 - pushing member; 111 - pushing part; 112 - wedge part; 12 - driver; 121 - driving cylinder; 122 - elastic member; 20 - pressing member; 21 - rotating part; 22 - pressing part; 221 - body block; 2211 - first groove; 2212 - second groove; 222 - pressing block; 223 - abutting block; 30 - shell; 31 - containing space; 32 - extension outlet; 33 - support plate; 100 - fixed member; 200 - vehicle frame; 300 - bottom support self-locking pressing device. DETAILED DESCRIPTION

[0025] The present disclosure will now be discussed with reference to several example embodiments. It should be appreciated that these embodiments are discussed only to better illustrate the present disclosure and are not intended to limit the scope of the present disclosure in any way.

[0026] As used herein, the term "comprising" and its variations are to be interpreted as open-ended terms meaning "including but not limited to". The term "based on" is to be interpreted as "at least partially based on". The terms "one embodiment" and "an embodiment" are to be interpreted as "at least one embodiment". The term "another embodiment" is to be interpreted as "at least one other embodiment". The terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "vertical", "horizontal", "lateral", "longitudinal", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments and are not intended to limit the indicated devices, elements, or components to having a specific orientation or being constructed and operated in a specific orientation. Furthermore, some of the above terms may be used to indicate other meanings besides orientations or positional relationships; for example, the term "upper" may in some cases indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application according to the specific circumstances. In addition, the terms "installed", "set up", "equipped with", "connected", and "linked" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, elements, or components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. Furthermore, the terms "first," "second," etc., are mainly used to distinguish different devices, elements, or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0027] This embodiment discloses a base self-locking clamping device 300, such as Figures 1-8As shown, the bottom self-locking pressing device 300 can include a pushing mechanism 10, a pressing member 20, and a shell 30, the shell 30 has a containing space 31 inside, the shell 30 is provided with an outlet 32 in communication with the containing space 31, the pressing member 20 is L-shaped and includes a rotating part 21 and a pressing part 22, the first end of the rotating part 21 is hinged to the inside of the shell 30, the pressing part 22 is arranged at the second end of the rotating part 21 and extends away from the rotating part 21, and the pressing part 22 can extend out of the shell 30 through the outlet 32; the pressing member 20 includes a recovery state and a pressing state, in the recovery state, the pressing member 20 is located inside the shell 30, and in the pressing state, the pressing part 22 extends out of the outlet 32 and the lower side of the pressing part 22 can abut against the fixed part 100; the pushing mechanism 10 includes a driver 12 and a pushing piece 11, the pushing piece 11 includes a pushing part 111, the driver 12 can drive the pushing part 111 to move along the extension direction of the outlet 32, and the pushing part 111 can push the rotating part 21 to rotate, so that the pressing member 20 can be switched between the recovery state and the pressing state; the pushing piece 11 further includes a wedge-shaped part 112, the pressing part 22 includes a body block 221 and a pressing block 222 arranged away from the rotating part 21, the upper side of the pressing block 222 is provided with an abutting surface, the wedge-shaped part 112 can abut against the abutting surface, and a first interval distance is arranged between the center of the pressing block 222 and the hinge point of the rotating part 21 along the width direction of the rotating part 21.

[0028] It should be noted that the above technical solutions of the present application can be mainly used for fixing the battery pack on the automobile, and the battery can be more stably fixed by arranging a plurality of the above bottom self-locking pressing devices 300, wherein the shell 30 can be fixed on the vehicle frame 200, and the pressing member 20 can exert a force on the battery pack frame, so as to achieve the purpose of fixing the battery pack on the vehicle frame 200. Similarly, the above device of the present application can also be used in similar situations that require disassembly and fixation.

[0029] In the above technical solutions, the pushing piece 11 of the pushing mechanism 10 pushes the pressing member 20 to rotate, so that the pressing member 20 can extend out of the opening of the shell 30, and the pressing member 20 is switched from the recovery state to the pressing state, Figures 4-8 The process of gradually changing the internal structure of the bottom self-locking pressing device 300 during the process of gradually switching from the recovery state to the pressing state is shown (wherein Figure 8The diagram shows the clamping member in an overpressured state (a state that cannot be achieved in actual use; it is used as an example to illustrate that sufficient force can be applied to the fixed member through overpressure). During this process, the clamping member 20 gradually moves and eventually abuts against the fixed member 100. With the pushing force of the pushing mechanism 10, in the clamping state, the clamping member 20 can be continuously subjected to a force toward the fixed member 100, thereby achieving the purpose of fixing the fixed member 100. Simultaneously, since the clamping member 20 can rotate along the hinge point, when the clamping member 20 transitions to the clamping state, due to inertia, when the force changes from a driving force to a static force, the force conversion will cause its… When the clamping member 20 impacts the fixed member 100, the reaction force of the impact will cause the clamping member 20 to rebound, making the locking unstable. In the above technical solution, the wedge-shaped part 112 of the pushing mechanism 10 and the clamping block 222 are in contact, and a first interval distance is set between the center of the clamping block 222 and the hinge point of the rotating part 21 along the width direction of the rotating part 21. This makes the force between the wedge-shaped block and the clamping block 222 form a torque that is opposite to the rebound force. Moreover, the direction of this torque is not the driving direction of the driver 12. At this time, the force of this torque comes from the structural strength of the wedge-shaped part 112. Therefore, it can play a better role in preventing rebound and making the locking more stable.

[0030] The rotating part 21 and the clamping part 22 can be integrated or fixedly connected as separate components in an appropriate manner. The driver 12 can be a driving device or component capable of generating linear driving force, such as a driving cylinder 121, a driving hydraulic cylinder, or a transmission structure driven by an electric motor. The driving cylinder 121 can have a faster response speed, while the driving hydraulic cylinder can generate a larger driving force. The rotating part 21 can be rotatably connected to the housing 30 by means of hinges, rotating pins, or other hinged components. Specifically, it can be hinged to the inner wall of the housing 30. Since the rotating part 21 is in an inclined state opposite to the direction of rotation in the retracted state, in order to ensure a stable pushing force, it can include a structure extending in the horizontal direction, so as to directly push the rotating part 21 toward the side of the pushing member 11. The lower side of the wedge-shaped part 112 can be a flat surface or an inclined surface.

[0031] Furthermore, in order for the wedge to be accurately pressed against the mating surface, such as Figures 3-8 As shown, the top surface of the clamping block 222 protrudes from the top surface of the main body block 221.

[0032] Furthermore, in order to make the clamping block 222 fit more closely to the wedge-shaped portion 112, ensuring that the wedge-shaped portion 112 can apply sufficient force to the clamping block 222, such as Figures 3-8As shown, the body block 221 is provided with a first recess 2211, the pressing block 222 is hinged in the first recess 2211, the top of the pressing block 222 protrudes from the opening of the first recess 2211, the top of the pressing block 222 comprises an extending structure extending in the width direction, a space is provided between the extending structure and the first recess 2211, and the width of the top of the pressing block 222 is greater than the width of the first recess 2211. By enabling the pressing block 222 to rotate relative to the body block 221, when the driver 12 pushes the wedge-shaped part 112 to gradually approach and release the pressing block 222, the pressing block 222 can be pushed to rotate relative to the body block 221, at the same time, the abutting surface of the wedge-shaped part 112 can be turned to the lower side of the wedge-shaped part 112, and then, in the process that the wedge-shaped part 112 continues to move and continuously press the pressing block 222, the pressing block 222 can always be in abutting state with the wedge-shaped part 112 under the action of friction. The space between the extending structure and the first recess 2211 can ensure that the pressing block 222 has a certain rotation space, and at the same time, it can also prevent the pressing block 222 from rotating excessively to a position where the wedge-shaped part 112 cannot contact when the wedge-shaped part 112 is retracted (in the retracted state), that is, as shown in the figure, prevent it from rotating excessively forward or backward.

[0033] Since the pressing mechanism actually only has a part of the lower side of the pressing part 22 abutting on the fixed part 100, in order to ensure that the pressing member 20 can abut on the fixed part 100 and can generate a larger pressing force, the pressing member 20 is provided with the pressing block 222. Figures 3-8 As shown, the pressing member 20 further comprises an abutting block 223 for abutting on the fixed part 100, the abutting block 223 is arranged on the side of the body block 221 facing the fixed part 100, and the abutting block 223 protrudes from the body block 221; in the pressing state, the vertical distance between the lower side of the abutting block 223 and the abutting surface is L1, and the vertical distance between the abutting surface and the fixed part 100 is L2, and L1>L2.

[0034] By using the protruding structure of the abutting block 223, the abutting block 223 can preferentially contact the fixed part 100, and the vertical distance between the lower side of the abutting block 223 and the abutting surface is slightly greater than the vertical distance between the abutting surface and the fixed part 100, that is, L1>L2, so that the pressing part 22 of the pressing member 20 can be elastically deformed under the action of the pushing part 11 and the fixed part 100, so that the pressing force not only comes from the action of the driver 12, but also comes from the elastic deformation of the pressing part 22, thereby ensuring the pressing effect.

[0035] Since the movement track of the pressing member 20 is the arc movement around the hinge point of the rotating part 21, the side of the pressing member 20 for pressing the fixed part 100 is also moved along the arc, if the fixed plane of the pressing member 20 is in abutment with the fixed part 100, in the process of contacting the fixed part 100, as shown in Figures 4-5 the plane close to the inner side will first contact the fixed part 100, and in the process of gradually pressing the fixed part 100, the part close to the inner side of the plane will be subjected to greater extrusion force, and the far side direction will be subjected to smaller force, not only the force is not balanced, but also the long-term use will lead to uneven wear of the plane, and even failure.

[0036] As a further embodiment, as shown in Figures 3-8 the body block 221 is further provided with a second groove 2212, the abutment block 223 is hinged in the second groove 2212, the lower side of the abutment block 223 protrudes from the opening of the second groove 2212, the lower side of the abutment block 223 extends along the width direction thereof, and a gap is provided between the lower side of the abutment block 223 and the second groove 2212, and the width of the lower side of the abutment block 223 is greater than the width of the second groove 2212.

[0037] By using the second groove 2212 and the hinged arrangement of the abutment block 223, the abutment block 223 can rotate relative to the body block 221, when the abutment block 223 contacts the fixed part 100, it can rotate, so that the lower side of the abutment block 223 directly abuts on the fixed part 100, before reaching the pressing state, the abutment block 223 will remain different, and the body block 221 can rotate relative to the abutment block 223, so that the pressing force is gradually increased, thereby ensuring the pressing effect. In order to make the abutment block 223 apply force to the fixed part 100 evenly, the contact surface of the abutment block 223 and the fixed part 100 can have as large an area as possible, thereby ensuring the balance and stability of the applied force.

[0038] Since the wedge-shaped part 112 is a movable member, its supporting force mainly comes from the movable part of the driver 12, and its structural strength is relatively low, and in long-term use, it may be deformed due to long-term stress, and even cause the situation that it cannot move. In order to avoid the above situation, as shown in Figures 3-8 a support plate 33 extending in the horizontal direction is fixedly arranged in the shell 30, the upper side of the wedge-shaped part 112 abuts on the lower side of the support plate 33, and the wedge-shaped part 112 can move along the extension direction of the support plate 33.

[0039] The support plate 33 is a fixed structure in the shell 30, and can provide a large support force when its structural strength is sufficient. In addition, the support plate 33 can guide the movement of the wedge-shaped part 112. When the wedge-shaped part 112 is moved into position and exerts a force on the pressing block 222, the support plate 33 can provide a support force for the wedge-shaped part 112, so that the force is transmitted to the support plate 33. When the structural strength is large, the support plate 33 can provide a large enough support force for the wedge-shaped part 112.

[0040] In order to avoid the wedge-shaped part 112 from being blocked during the process of exerting force by the pressing mechanism, and to be able to exert a larger force, as shown in Figures 3-8 The lower side of the wedge-shaped part 112 is gradually away from the support plate 33 in the direction away from the outlet 32, and the maximum distance between the lower side of the support plate 33 and the support plate 33 is greater than the distance between the upper side of the pressing block 222 and the support plate 33.

[0041] Due to the arrangement of the support plate 33, the wedge-shaped part 112 gradually enters the gap between the support plate 33 and the pressing block 222 during movement. In order to make the process smoother, the lower side of the wedge-shaped part 112 gradually increases in thickness during the process of gradually entering the gap between the support plate 33 and the pressing block 222, as shown in Figures 3-8 Compared with a shape with constant thickness, the process of exerting force is gradually increased. On the side close to the outlet 32, the distance can be slightly smaller than the distance between the support plate 33 and the pressing block 222, and the other end can be set to be greater than the distance between the support plate 33 and the pressing block 222, so as to achieve the effect of gradually increasing the pressing force, and prevent blockage during movement.

[0042] Since the pressing member 20 needs to rotate, in order to reduce the occupation of the space above the pressed part in the recycling state, the distance between the hinge point of the rotating part 21 and the shell 30 and the center of rotation of the pressing block 222 is L3, and the distance between the hinge point of the rotating part 21 and the shell 30 and the center of rotation of the abutting block 223 is L4, 0.7 < L3 / L4 < 0.9.

[0043] The pressing member 20 is actually centered on its hinge point, and forms two arc-shaped movement tracks with the rotation center of the pressing block 222 and the rotation center of the abutting block 223, respectively. The accommodation space 31 in the shell 30 needs to be able to accommodate the two movement tracks. When the radii of the two movement tracks differ greatly, a greater space change requirement in the longitudinal direction will be generated. For example, when the length of the rotating part 21 is shortened, L3 will be reduced, while the length of L4 is still relatively long. In the pressing state, the longitudinal space occupied by the pressing member 20 is small, while in the recovery state, the longitudinal space occupied by the pressing member 20 is large. In order to cope with this change, the accommodation space 31 in the shell 30 needs to occupy more space in the longitudinal direction. For vehicles, this will lead to more occupation of the in-vehicle chassis space, causing the vehicle's center of gravity to rise. When L3 and L4 are similar in length, the hinge position can be lowered to reduce the occupation requirement of the upper space. More specifically, it can be set to 0.7 < L3 / L4 < 0.9.

[0044] As a specific embodiment, as shown in Figure 3 The driver 12 includes a driving cylinder 121 connected to the pushing member 11. The driving end of the driving cylinder 121 can move in the horizontal direction. When the driver 12 only includes the driving cylinder 121, the wedge-shaped part 112 can be linked with the pressing block 222 (for example, a slide is arranged on the upper side of the pressing block 222, so that the wedge-shaped part 112 can slide relative to the pressing block 222. When it moves to the edge of the slide, it can still drive the pressing block 222 to move), so that the driving cylinder 121 can drive the pressing block 222 to reciprocate.

[0045] Further, as shown in Figure 3 The driver 12 further includes an elastic member 122. The first end of the elastic member 122 is connected to the pressing member 20, and the second end of the elastic member 122 is connected to the shell 30. The elastic member 122 is in a stretched state. In this embodiment, the driver 12 can be used to drive the pressing member 20 to convert from the recovery state to the pressing state, and the elastic tension of the elastic member 122 can be used to drive the pressing member 20 to convert from the pressing state to the recovery state.

[0046] Those skilled in the art can understand that the above embodiments are specific cases for implementing the present disclosure, and in actual applications, various changes can be made in form and details without departing from the scope of the present disclosure.

Claims

1. A self-locking underwire compression device, comprising: The bottom support self-locking pressing device comprises: A pushing mechanism, a pressing member and a shell, the shell has an accommodating space inside, the shell is provided with an extension opening communicating with the accommodating space, the pressing member is L-shaped, comprising a rotating part and a pressing part, the first end of the rotating part is hinged to the inside of the shell, the pressing part is arranged at the second end of the rotating part and extends away from the rotating part, the pressing part can extend out of the shell through the extension opening; The pressing member comprises a recovery state and a pressing state, in the recovery state, the pressing member is located inside the shell, in the pressing state, the pressing part extends out through the extension opening and the lower side of the pressing part can abut on the fixed part; The pushing mechanism comprises a driver and a pushing piece, the pushing piece comprises a pushing part, the driver can drive the pushing part to move along the extension direction of the extension opening, the pushing part can push the rotating part to rotate, so that the pressing member can be switched between the recovery state and the pressing state; The pushing piece further comprises a wedge-shaped part, the pressing part comprises a body block and a pressing block arranged away from the rotating part, the upper side of the pressing block is provided with a fitting surface, the wedge-shaped part can abut on the fitting surface, the center of the pressing block and the hinge point of the rotating part are provided with a first interval distance along the width direction of the rotating part.

2. The bottom support self-locking pressing device according to claim 1, wherein The upper top surface of the pressing block is protruded from the upper top surface of the body block.

3. The bottom support self-locking pressing device according to claim 2, wherein The body block is provided with a first groove, the pressing block is hinged in the first groove, the top of the pressing block protrudes from the opening of the first groove, the top of the pressing block comprises an extension structure extending along the width direction, an interval is provided between the extension structure and the first groove, and the width of the top of the pressing block is greater than the width of the first groove.

4. The bottom support self-locking pressing device according to claim 1, wherein The pressing member further comprises an abutting block, the abutting block is used for abutting on the fixed part, the abutting block is arranged on the side of the body block facing the fixed part, and the abutting block is protruded from the body block; In the pressing state, the interval distance between the lower side of the abutting block and the fitting surface along the vertical direction is L1, the interval distance between the fitting surface and the fixed part along the vertical direction is L2, and L1>L2.

5. The bottom support self-locking pressing device according to claim 4, wherein The body block is further provided with a second groove, the abutting block is hinged in the second groove, the lower side of the abutting block protrudes from the opening of the second groove, the lower side of the abutting block extends along the width direction thereof and is provided with an interval from the second groove, and the width of the lower side of the abutting block is greater than the width of the second groove.

6. The bottom support self-locking pressing device according to claim 1, wherein The support plate is fixedly arranged in the shell and extends horizontally, the upper side of the wedge-shaped part is attached to the lower side of the support plate, and the wedge-shaped part is movable along the extension direction of the support plate.

7. The self-locking pressing device of the bottom holder according to claim 6, characterized in that, the lower side of the wedge-shaped part is gradually away from the support plate in the direction away from the outlet, and the maximum distance between the lower side of the support plate and the support plate is greater than the interval distance between the upper side of the pressing block and the support plate.

8. The self-locking pressing device of the bottom holder according to claim 1, characterized in that, the distance between the hinge point of the rotating part and the shell and the rotating center of the pressing block is L3, the distance between the hinge point of the rotating part and the shell and the rotating center of the abutting block is L4, and 0.7 < L3 / L4 < 0.

9.

9. The self-locking pressing device of the bottom holder according to claim 1, characterized in that, the driver comprises a driving cylinder connected with the pushing piece, and the driving end of the driving cylinder is movable in the horizontal direction.

10. The self-locking pressing device of the bottom holder according to claim 9, characterized in that, the driver further comprises an elastic piece, the first end of the elastic piece is connected with the pressing member, the second end of the elastic piece is connected with the shell, and the elastic piece is in a stretched state.

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