A frame locking device

Abstract

The application relates to a frame locking device which comprises a lower frame, an upper frame and locking assemblies, the lower frame comprises left and right side beams, a cross beam is arranged between the left and right side beams, the upper frame comprises left and right side rods, the locking assemblies are arranged in multiple numbers, the locking assembly comprises a supporting lug, a short swing arm, a pressing arm and a long swing arm, the supporting lug is fixed on the cross beam, the lower end of the short swing arm is hinged to the supporting lug through a pin shaft, one end of the pressing arm is hinged to the upper end of the short swing arm through a pin shaft, the other end of the pressing arm is fixed with a pressing block for pressing the left or right side rod through a connecting bolt, the long swing arm is arranged in two and symmetrically distributed on the two sides of the pressing arm, the lower ends of the two long swing arms are hinged to the cross beam through pin shafts, the upper halves of the two long swing arms are hinged to the middle part of the pressing arm through pin shafts, and a driving cylinder is hinged between the upper ends of the two long swing arms through a pin shaft. The frame locking device has the advantages of simple structure, convenient control, reliable locking, strong adaptability and high safety.

Description

TECHNICAL FIELD

[0001] The present application relates to a locking device, in particular to a frame locking device based on four-bar linkage structure. BACKGROUND

[0002] The locking device refers to the device for locking and fixing two components or devices together. For example, the battery pack of a heavy vehicle, because of the long charging time, the battery pack is usually installed and fixed on a support frame, and a supporting frame and a locking mechanism are arranged on the vehicle chassis to cooperate with the supporting frame. When in use, the supporting frame and the battery pack are placed on the supporting frame and locked and fixed. When the power is insufficient, the original supporting frame and the battery pack can be directly removed, and the supporting frame and the battery pack full of electricity are installed on the supporting frame to achieve the purpose of quickly replacing the battery pack, so as to avoid affecting the normal use of the vehicle. However, the existing locking mechanism of the battery pack supporting frame of the heavy vehicle has the problems of complex structure, inconvenient operation, unreliable locking, and the like. Especially, the locking components are easily worn out due to the bumping and vibration during the driving of the vehicle, which affects the service life and safety. SUMMARY

[0003] The present application aims to provide a frame locking device based on four-bar linkage structure, which has the advantages of simple structure, convenient operation, reliable locking, strong adaptability and high safety.

[0004] In order to solve the above-mentioned problems existing in the prior art, the present application provides a frame locking device, which comprises a lower frame, an upper frame and a locking assembly. The lower frame comprises a left side beam and a right side beam, and a cross beam is arranged between the left side beam and the right side beam. The upper frame comprises a left side rod and a right side rod corresponding to the upper sides of the left side beam and the right side beam. The locking assembly is provided in plurality. The locking assembly comprises an ear, a short swing arm, a pressing arm and a long swing arm. The ear is fixed on the cross beam. The lower end of the short swing arm is hinged to the ear through a pin shaft. One end of the pressing arm is hinged to the upper end of the short swing arm through a pin shaft. The other end of the pressing arm is fixed with a pressing block for pressing the left side rod or the right side rod through a connecting bolt. The long swing arm is provided in two and symmetrically distributed on both sides of the pressing arm. The lower ends of the two long swing arms are hinged to the cross beam through pin shafts. The upper halves of the two long swing arms are hinged to the middle part of the pressing arm through pin shafts. The upper ends of the two long swing arms are hinged to a driving cylinder through a pin shaft.

[0005] Further, the present application provides a frame locking device, wherein the plurality of locking assemblies are symmetrically distributed left and right. The symmetrically distributed long swing arms are hinged to the piston rod and the cylinder body of the same driving cylinder. The symmetrically distributed pressing arms are provided with a gas spring. The two ends of the gas spring are connected to the pin shafts between the corresponding pressing arms and the short swing arms, respectively.

[0006] Further, the frame locking device, wherein the pressing block is fixed at the end of the extrusion arm, the pressing block is provided with mounting hole for mounting connecting bolt, the mounting hole is vertical strip hole, the extrusion arm is provided with height adjusting support part at the upper side of the pressing block, the height adjusting support part is provided with threaded positioning hole for mounting height adjusting bolt.

[0007] Further, the frame locking device, wherein the pressing block is fixed at the end of the extrusion arm, the pressing block is provided with mounting hole for mounting connecting bolt, the mounting hole is vertical strip hole, the extrusion arm is provided with height adjusting support part at the upper side of the pressing block, the height adjusting support part is provided with threaded positioning hole for mounting height adjusting bolt.

[0008] Further, the frame locking device, wherein the pressing block is fixed at the end of the extrusion arm, the pressing block is provided with mounting hole for mounting connecting bolt, the mounting hole is vertical strip hole, the extrusion arm is provided with height adjusting support part at the upper side of the pressing block, the height adjusting support part is provided with threaded positioning hole for mounting height adjusting bolt.

[0009] Further, the frame locking device, wherein the pressing block is fixed at the end of the extrusion arm, the pressing block is provided with mounting hole for mounting connecting bolt, the mounting hole is vertical strip hole, the extrusion arm is provided with height adjusting support part at the upper side of the pressing block, the height adjusting support part is provided with threaded positioning hole for mounting height adjusting bolt.

[0010] Further, the frame locking device, wherein the pressing block is fixed at the end of the extrusion arm, the pressing block is provided with mounting hole for mounting connecting bolt, the mounting hole is vertical strip hole, the extrusion arm is provided with height adjusting support part at the upper side of the pressing block, the height adjusting support part is provided with threaded positioning hole for mounting height adjusting bolt.

[0011] Further, the frame locking device, wherein the pressing block is fixed at the end of the extrusion arm, the pressing block is provided with mounting hole for mounting connecting bolt, the mounting hole is vertical strip hole, the extrusion arm is provided with height adjusting support part at the upper side of the pressing block, the height adjusting support part is provided with threaded positioning hole for mounting height adjusting bolt.

[0012] Further, the frame locking device, wherein the pressing block is fixed at the end of the extrusion arm, the pressing block is provided with mounting hole for mounting connecting bolt, the mounting hole is vertical strip hole, the extrusion arm is provided with height adjusting support part at the upper side of the pressing block, the height adjusting support part is provided with threaded positioning hole for mounting height adjusting bolt.

[0013] Further, the frame locking device, wherein the pressing block is fixed at the end of the extrusion arm, the pressing block is provided with mounting hole for mounting connecting bolt, the mounting hole is vertical strip hole, the extrusion arm is provided with height adjusting support part at the upper side of the pressing block, the height adjusting support part is provided with threaded positioning hole for mounting height adjusting bolt.

[0014] Compared with the prior art, the frame locking device has the following advantages: the lower frame is provided with left and right side beams, the upper frame is provided with left and right side rods corresponding to the upper sides of the left and right side beams, and the locking assembly is provided with multiple supporting lugs, short swing arms, extrusion arms and long swing arms, wherein the supporting lug is fixed on the cross beam, the lower end of the short swing arm is hinged to the supporting lug through a pin shaft, one end of the extrusion arm is hinged to the upper end of the short swing arm through a pin shaft, the other end of the extrusion arm is fixed with a pressing block for pressing the left or right side rod through a connecting bolt, the long swing arms are provided with two and are symmetrically distributed on both sides of the extrusion arm, the lower ends of the two long swing arms are hinged to the cross beam through pin shafts, the upper halves of the two long swing arms are hinged to the middle part of the extrusion arm through pin shafts, and the upper ends of the two long swing arms are hinged to a driving cylinder through a pin shaft. Thus, a frame locking device with simple structure, convenient operation, reliable locking, strong adaptability and high safety is formed. In actual application, the long swing arms are first pulled by the driving cylinder to make the pressing block leave the space on the upper sides of the left and right side beams, then the upper frame is placed on the lower frame and the long swing arms are pushed by the driving cylinder, and the left and right side rods are correspondingly extruded on the left and right side beams by the pressing block, so that the purpose of locking and fixing the upper frame on the lower frame is achieved. The four-bar locking assembly composed of the supporting lug, the short swing arm, the extrusion arm and the long swing arm simplifies the structure and improves the convenience of operation. The locking and unlocking purposes are achieved by pulling and pushing the long swing arms through the driving cylinder, the locking torque is effectively increased, and the locking reliability is improved. The adaptability is improved by the pressing block, the phenomenon of extrusion failure is effectively avoided, the locking reliability is enhanced, and when the pressing block is damaged, the locking device can work normally by replacing the pressing block, thereby reducing the maintenance and material costs. The frame locking device provided by the present application is used as a battery pack support system of a heavy vehicle, wherein the lower frame is fixed on the vehicle chassis, and the upper frame is used to fix the battery pack. On the basis of realizing quick disassembly and replacement of the battery pack, the phenomenon of locking component wear caused by bumping and vibration is effectively avoided, the service life is prolonged, and the safety is ensured.

[0015] The frame locking device will be further described in detail in combination with the specific embodiments shown in the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a front view of the frame locking device of the present application;

[0017] Figure 2 is a top view of the frame locking device of the present application;

[0018] Figure 3 is an axonometric view of the frame locking device of the present application; Figure 1 ;

[0019] Figure 4 Axiometric view of a frame locking device according to the present invention Figure 2 ;

[0020] Figure 5 for Figure 3 A magnified view of a portion of position A in the middle;

[0021] Figure 6 for Figure 4 A magnified view of a portion of position B in the middle;

[0022] Figure 7 This is a front view of the unlocked state of a frame locking device according to the present invention;

[0023] Figure 8 This is an isometric view of the unlocked state of a frame locking device according to the present invention;

[0024] Figure 9 for Figure 8 A magnified view of the area at position C. Detailed Implementation

[0025] First, it should be noted that the directional terms such as up, down, left, right, front, and back used in this invention are merely descriptions based on the accompanying drawings for ease of understanding, and are not intended to limit the technical solution or the scope of protection claimed in this invention.

[0026] like Figures 1 to 9 The present invention provides a specific embodiment of a frame locking device, comprising a lower frame 1, an upper frame 2, and a locking assembly. The lower frame 1 is provided with a left beam 11 and a right beam 12, and a crossbeam 13 is provided between the left beam 11 and the right beam 12; the upper frame 2 is provided with a left rod 21 and a right rod 22 corresponding to the upper sides of the left beam 11 and the right beam 12. Multiple locking components are provided, including a support lug 3, a short swing arm 4, a pressing arm 5, and a long swing arm 6. The support lug 3 is fixed to the crossbeam 13. The lower end of the short swing arm 4 is hinged to the support lug 3 by a pin. One end of the pressing arm 5 is hinged to the upper end of the short swing arm 4 by a pin. The other end of the pressing arm 5 is fixed with a pressure block 51 that presses down the left rod 21 or the right rod 22 by a connecting bolt. Two long swing arms 6 are provided and are symmetrically distributed on both sides of the pressing arm 5. The lower ends of the two long swing arms 6 are hinged to the crossbeam 13 by pins. The upper halves of the two long swing arms 6 are hinged to the middle of the pressing arm 5 by pins. A drive cylinder 7 is hinged between the upper ends of the two long swing arms 5 by a pin.

[0027] The above structure constitutes a frame locking device which is simple in structure, convenient to operate, reliable in locking, strong in adaptability and high in safety. In practical application, the driving cylinder 7 is used to pull the long swing arm 6 to make the pressing block 51 leave the space on the upper side of the left beam 11 and the right beam 12, and then the upper frame 2 is placed on the lower frame 1 and the long swing arm 6 is pushed by the driving cylinder 7, so that the left beam 21 and the right beam 22 are correspondingly pressed on the left beam 11 and the right beam 12 by the pressing block 51, thereby achieving the purpose of locking and fixing the upper frame 2 on the lower frame 1. The four-bar locking assembly composed of the supporting lug 3, the short swing arm 4, the pressing arm 5 and the long swing arm 6 simplifies the structure and improves the convenience of operation. The locking and unlocking purposes can be achieved by pushing and pulling the long swing arm 6 by the driving cylinder 7, and the locking torque can be effectively increased, thereby improving the locking reliability. The pressing block 51 improves the adaptability and effectively avoids the phenomenon of insufficient pressing, thereby enhancing the locking reliability. When the pressing block 51 is damaged, the locking device can work normally by replacing the pressing block 51, thereby reducing the maintenance and material costs. The frame locking device provided by the application is used as a battery pack support system of a heavy vehicle. The lower frame 1 is fixed on the vehicle chassis, and the upper frame 2 is used to fix the battery pack. The phenomenon of locking component wear caused by bumping and vibration can be effectively avoided on the basis of realizing quick disassembly and replacement of the battery pack, thereby prolonging the service life and ensuring safety. It should be noted that the frame locking device provided by the application is not limited to being used as a battery pack support system of a heavy vehicle, but can also be applied to other docking and locking occasions. As a motion execution component, the application is not limited to using a cylinder, but can also use an oil cylinder or an electric cylinder. Four locking assemblies are shown in the drawings, but the number of locking assemblies is not limited to four.

[0028] As an optimization scheme, the application adopts a left-right symmetrical arrangement of multiple locking assemblies. The long swing arms 6 symmetrically distributed are connected with the piston rod and the cylinder body of the same driving cylinder 7, and the gas springs 8 are arranged between the symmetrically distributed pressing arms 5, and the two ends of the gas springs 8 are connected with the pin shafts between the corresponding pressing arms 5 and short swing arms 4. This arrangement simplifies the structure, reduces the number of driving cylinders used, and reduces the cost. The gas springs 8 provide auxiliary locking force to prevent the locking effect from being affected by insufficient gas pressure of the driving cylinder 7, and also play a balancing and coordinating role to make the symmetrically distributed locking assemblies move synchronously, thereby improving the structural stability. It should be noted that the locking assemblies are not limited to the symmetrical arrangement, and the left and right distributed locking assemblies are not limited to using the same driving cylinder. The locking assemblies can also be staggered and arranged with driving cylinders to achieve the technical purpose of the application.

[0029] As the optimization scheme, the present application fixes the pressing block 51 at the end position of the extrusion arm 5, wherein the pressing block 51 is provided with a mounting hole 511 for mounting a connecting bolt, and the mounting hole 511 is a vertical strip-shaped hole; and the extrusion arm 5 is provided with an adjusting support 52 at the upper side position of the pressing block 51, and the adjusting support 52 is provided with a threaded positioning hole 521 for mounting an adjusting bolt. The structure is arranged by adopting the strip-shaped hole structure of the mounting hole 511, so that the height position of the pressing block 51 can be conveniently adjusted, and the adaptability and practicability are improved; by arranging the adjusting support 52 and the threaded positioning hole 521, when the height position of the pressing block 51 is determined, the adjusting bolt mounted in the threaded positioning hole 521 can top the pressing block 51, so that the upward movement of the pressing block 51 can be effectively avoided, and the reliability of the locking and fixing is enhanced. It should be noted that, in order to ensure the installation stability of the pressing block 51, the present application usually arranges multiple mounting holes 511 and threaded positioning holes 521 respectively.

[0030] As the optimization scheme, in order to enhance the adaptability and locking reliability, the present application also fixes the pad 9 on the left bar 21 and the right bar 22 at the position corresponding to the pressing block 51, and makes the upper side of the pad 9 adopt an inclined surface and be lower on one side of the long swing arm 6 than on the other side; at the same time, the present application makes the lower end surface of the pressing block 51 adopt an arc surface structure, which will be pressed more tightly in the locking process, thereby enhancing the force application effect and locking reliability. In order to facilitate the butt joint positioning and prevent the upper frame 2 from moving in the horizontal direction relative to the lower frame 1, the present application also fixes multiple vertical limiting columns 14 on the lower frame 1, and makes the upper end of the limiting column 14 adopt a bullet head structure; correspondingly, multiple limiting blocks 23 are fixed on the upper frame 2, and limiting holes matched with the limiting columns 14 are arranged on the limiting blocks 23.

[0031] As the specific embodiment, the first gusset plates 15 are fixed on the upper sides of the left and right side beams 11 and 12 respectively, and the second gusset plates 24 corresponding to the first gusset plates 15 are fixed on the lower sides of the left and right side beams 21 and 22 respectively. The first gusset plates 15 and the second gusset plates 24 can avoid the problem of poor adhesion between the upper frame 2 and the lower frame 1, and improve the tightness of the combination of the two. In order to ensure the locking force effect, the pressing blocks 51 and the cushion blocks 9 are arranged above the first gusset plates 15 and the second gusset plates 24, and the third gusset plates 25 are fixed between the left and right side beams 21 and 22 and the cushion blocks 9 respectively. In actual application, the second gusset plates 24 and the third gusset plates 25 are made of rubber, the elastic deformation capacity of the second gusset plates 24 can effectively enhance the tightness of the combination of the upper frame 2 and the lower frame 1, and the elastic deformation capacity of the third gusset plates 25 can effectively enhance the adaptability and locking reliability of the cushion blocks 9. It should be noted that the invention usually sets the supporting ears 3 on both sides of the lower end of the short swing arm 4, and sets the U-shaped fork head 53 of the pressing arm 5, so that the two side walls of the U-shaped fork head 53 are arranged on both sides of the upper end of the short swing arm 4, so as to improve the stability of the structure; in order to enhance the stability of the structure and support, the invention also sets the lower supporting rods 16 between the left and right side beams 11 and 12 of the lower frame 1, and sets the upper supporting rods 26 between the left and right side beams 21 and 22 of the upper frame 2.

[0032] The above embodiments are only descriptions of the preferred embodiments of the present application, and do not limit the protection scope of the present application. Various modifications made by those skilled in the art according to the technical solutions of the present application should fall within the protection scope of the claims of the present application.

Claims

1. A frame locking device, characterized by The utility model provides a kind of frame locking device, including lower frame (1), upper frame (2) and locking assembly, the lower frame (1) includes left beam (11) and right beam (12), and left beam (11) and right beam (12) are equipped with crossbeam (13) between, the upper frame (2) includes left bar (21) and right bar (22) corresponding on left beam (11) and right beam (12) upper side, locking assembly is equipped with multiple, locking assembly includes lug (3), short swing arm (4), extrusion arm (5) and long swing arm (6), lug (3) is fixed on crossbeam (13), the lower end of short swing arm (4) is hinged with lug (3) by pin shaft, one end of extrusion arm (5) is hinged with the upper end of short swing arm (4) by pin shaft, the other end of extrusion arm (5) is fixed with the pressing block (51) of left bar (21) or right bar (22) by connecting bolt, long swing arm (6) is equipped with two and makes it symmetric distribution in the both sides of extrusion arm (5), the lower end of two long swing arms (6) is hinged with crossbeam (13) by pin shaft, the upper half of two long swing arms (6) is hinged with the middle part of extrusion arm (5) by pin shaft, the upper end of two long swing arms is hinged with drive cylinder (7) by pin shaft;The multiple locking assemblies are left-right symmetrical distribution, and the piston rod and cylinder body of the same drive cylinder (7) are hinged with the symmetrically distributed long swing arm (6), and air spring (8) is equipped between the symmetrically distributed extrusion arm (5), and the both ends of air spring (8) are connected with the pin shaft between corresponding extrusion arm (5) and short swing arm (4) respectively; The pressing block (51) is fixed in the end position of extrusion arm (5), and mounting hole (511) for mounting connecting bolt is arranged on the pressing block (51), the mounting hole (511) is vertical strip hole, extrusion arm (5) is provided with height-adjusting support portion (52) in the upper side position of pressing block (51), and threaded positioning hole (521) for mounting height-adjusting bolt is arranged on the height-adjusting support portion (52);The corresponding position of left bar (21) and right bar (22) and pressing block (51) is fixed with pad (9), the upper side of pad (9) is inclined surface and makes it lower on one side than the other side relative to long swing arm (6), and the lower end surface of pressing block (51) is arc surface;Multiple vertical limiting columns (14) are fixed on the lower frame (1), and the upper end of limiting column (14) is bullet structure, multiple limiting blocks (23) are fixed on the upper frame (2), and limiting hole for cooperating with limiting column (14) is arranged on limiting block (23).

2. A frame locking device according to claim 1, wherein The upper side of left beam (11) and right beam (12) is respectively fixed with first backing plate (15) that is spaced distribution, and the lower side of left bar (21) and right bar (22) is respectively fixed with second backing plate (24) corresponding to first backing plate (15).

3. A frame locking device according to claim 2, wherein The pressing block (51) and pad (9) are in the upper position of first backing plate (15) and second backing plate (24), and the third backing plate (25) is further respectively fixed between left bar (21) and right bar (22) and pad (9).

4. A frame locking device according to claim 3, wherein Second backing plate (24) and third backing plate (25) are made of rubber.

5. A frame locking device according to claim 4, wherein The lower end of the short swing arm (4) is respectively provided with a lug (3), and the extrusion arm (5) is provided with a U-shaped fork head (53), and the two side walls of the U-shaped fork head (53) correspond to the upper ends of the two sides of the short swing arm (4).

6. A frame locking device according to claim 4, wherein The left beam (11) and the right beam (12) of the lower frame (1) are provided with the lower support rods (16) which are spaced apart, and the left rod (21) and the right rod (22) of the upper frame (2) are provided with the upper support rods (26) which are spaced apart.

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