Stretcher quick mounting and separating structure for electric drive cart

Abstract

The invention relates to the technical field of electric vehicles, in particular to a stretcher quick mounting and separating structure for an electric drive cart, which comprises a support rod, stretcher combining and separating mechanisms and telescopic pipe quick connectors, and the stretcher combining and separating mechanisms used for being connected with stretcher support rods are arranged on two sides of the support rod respectively. The two ends of the supporting rod are provided with telescopic pipe quick connectors used for being connected with telescopic pipes of the electric drive cart respectively. The stretcher combining and separating mechanism comprises a cover plate, a first base, a limiting plate and a locking plate, wherein the limiting plate and the locking plate are rotationally arranged between the cover plate and the first base. The telescopic pipe quick connector comprises a quick pressing plate and a second base, one side of the quick pressing plate is connected with the second base through a rotating shaft, and the other side of the quick pressing plate is detachably connected with the second base. According to the structure, rapid combination and separation of the stretcher and the electric drive cart can be achieved, the rescue speed is effectively increased, the installation width can be adjusted according to the stretcher, the stretcher can be effectively and completely unfolded and supported, the problem that the stretcher collapses due to infirm fixation and vehicle bumping in the wounded transferring process is effectively solved, and the wounded can be better protected.

Description

Technical Field

[0001] The invention belongs to the technical field of electric vehicles, and mainly relates to a stretcher quick installation and separation structure for an electric drive cart. Background Art

[0002] With technological advancements, electric carts with various applications have emerged in China. These carts can navigate remote and undeveloped terrain, such as hills, rocks, and other hazardous landforms. They are widely used in military, law enforcement, firefighting, and rescue missions. However, when rescuing a wounded person, the stretcher carrying the patient needs to be quickly secured or detached from the cart to expedite rescue efforts. Currently, the main method for securing the stretcher to the cart is a lashing mechanism, which involves directly tying the stretcher to the cart with ropes. This lashing mechanism has drawbacks such as lengthy lashing times, insecure fixation, and the stretcher's tendency to deform and collapse during transport. Summary of the Invention

[0003] In view of the aforementioned technical problems, the object of the present invention is to provide a stretcher quick installation and separation structure for an electric-drive cart.

[0004] The purpose of the present invention is to be achieved by adopting the following technical solutions. According to the present invention, a stretcher quick installation and separation structure for an electric-drive cart includes a support rod, a stretcher combining and separating mechanism, and a telescopic tube quick connector. Both sides of the support rod are respectively provided with a stretcher combining and separating mechanism for connecting with the stretcher support rod, and both ends of the support rod are respectively provided with a telescopic tube quick connector for connecting with the telescopic tube of the electric-drive trailer; the stretcher combining and separating mechanism includes a cover plate, a first base, a limit plate and a locking plate rotatably arranged between the cover plate and the first base, a stretcher positioning hole is provided on one of the cover plate and the first base, and both sides of the support rod are respectively connected to the first base; a limit tooth is convexly provided on the side of the limit plate close to the locking plate, and a locking tooth is provided on the side of the locking plate close to the limit plate, and the lower side of the locking tooth is provided for connecting with the limit plate when the stretcher support rod is not placed in the stretcher positioning hole. The locking plate is configured to lock the third stretcher support rod and the locking plate is configured to lock the third stretcher support rod when the stretcher support rod is inserted into the stretcher positioning hole. The locking plate is configured to lock the third stretcher support rod from the upper side and the locking plate is configured to lock the third stretcher support rod after the stretcher support rod is inserted into the stretcher positioning hole. The locking plate is configured to lock the third stretcher support rod from the upper side and the locking plate is configured to lock the stretcher support rod after the stretcher support rod is inserted into the stretcher positioning hole. The upper side of the locking tooth is provided with a first tooth groove for engaging with the limiting tooth after the stretcher support rod is limited by the locking part. A spring is provided between the locking plate and the limiting plate to tend to keep the limiting tooth and the first tooth groove or the second tooth groove in an engaged state. The lower side of the locking plate is provided with a handle for driving the locking plate to rotate to disengage the limiting tooth from the first tooth groove.

[0005] Furthermore, the support rod includes a transverse tube, and the transverse tube is provided with a straight hole corresponding to the mounting through hole on the first base.

[0006] Furthermore, the support rod also includes vertical tubes connected to both ends of the horizontal tube, and both ends of the horizontal tube are provided with circular holes coaxial with the corresponding vertical tubes.

[0007] Furthermore, both ends of the spring are respectively connected to the first spring mounting hole on the limiting plate and the second spring mounting hole on the locking plate.

[0008] Furthermore, two first mounting holes are provided on the cover plate, a second mounting hole is provided on the limit plate, a third mounting hole is provided on the locking plate, and two step bolt threaded holes are provided on the first base. A step bolt is used to pass through the first mounting hole and the second mounting hole in sequence and then be screwed into the corresponding step bolt threaded hole. Another bolt is used to pass through another first mounting hole and the second mounting hole in sequence and then be screwed into another corresponding step bolt threaded hole.

[0009] Furthermore, two limit screws are provided on the first base, one limit screw is used to form a stop fit with the outer side of the limit plate away from the locking plate, and the other limit screw is used to form a stop fit with the outer side of the locking plate away from the limit plate.

[0010] Furthermore, the telescopic tube quick connector includes a second base and a quick pressure plate. One side of the quick pressure plate is connected to the second base through a rotating shaft, and the other side is detachably connected to the second base. Both ends of the support rod are respectively connected to the second base.

[0011] Furthermore, a U-shaped opening is provided on the other side of the quick pressure plate. The lower end of the screw extending in the vertical direction passes through the U-shaped opening and is set on the second base through the connecting shaft. A second nut is screwed on the screw located above the U-shaped opening.

[0012] Furthermore, two force-applying handles are symmetrically distributed on the second nut.

[0013] According to the above technical solution, the present invention has the following beneficial effects:

[0014] (1) The structure has a quick installation and separation function, which can effectively solve the problem of slow installation and separation of the stretcher and the electric-driven cart. At the same time, the stretcher quick installation and separation structure has a good stretcher locking function, which effectively solves the problem of unstable binding and fixation. At the same time, the structure can adjust the installation width according to the stretcher, effectively fully expand and support the stretcher, effectively solve the problem of stretcher collapse caused by vehicle bumps during the transfer of the wounded, and can better protect the injured.

[0015] (2) This structure can realize the rapid combination and separation of the stretcher and the electric-driven cart, effectively improving the rescue speed. At the same time, the structure is safe and reliable, avoiding the problem of stretcher displacement during transportation. At the same time, the straight hole design on the structure can adjust the installation size according to the width of the stretcher, which is suitable for use with stretchers of different specifications.

[0016] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented in accordance with the contents of the specification. In addition, in order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the following specifically cites preferred embodiments and describes them in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The present invention is a structural diagram of a stretcher installed on an electric-driven cart using the quick-installation and separation structure proposed in the present invention.

[0018] Figure 2 The present invention is a structural diagram of a support rod in a quick installation and separation structure of a stretcher for an electric-driven cart.

[0019] Figure 3 yes Figure 2 Schematic diagram of the structure of the center cross tube.

[0020] Figure 4 The present invention is a structural schematic diagram of a stretcher combining and separating mechanism in a stretcher quick installation and separation structure for an electric drive cart.

[0021] Figure 5 yes Figure 4 Schematic diagram of the structure of the middle cover.

[0022] Figure 6 yes Figure 4 Schematic diagram of the structure of the first base.

[0023] Figure 7 This is a schematic diagram of the connection between the limit plate and the locking plate when the stretcher is not installed.

[0024] Figure 8 This is a schematic diagram of the connection between the limiting plate and the locking plate when the stretcher support rod is placed in the stretcher positioning hole but is not limited by the locking part.

[0025] Figure 9 It is a schematic diagram of the connection between the limiting plate and the locking plate when the stretcher support rod is limited by the locking part.

[0026] Figure 10 The present invention is a structural schematic diagram of a telescopic tube quick connector in a quick installation and separation structure of a stretcher for an electric drive cart.

[0027] Reference numerals

[0028] 1. Support rod, 101. Horizontal tube, 10101. Slotted hole, 10102. Round hole, 102. Vertical tube, 2. Stretcher combination and separation mechanism, 201. Cover plate, 20101. First mounting hole, 20102. First stretcher positioning hole, 202. Spring, 203. Limiting plate, 20301. Handle, 20302. First spring mounting hole, 20303. Second mounting hole, 20304. Limiting tooth, 204. First base, 20401. Mounting through hole, 20402. Limiting screw threaded hole, 20403. Step bolt threaded hole, 20404. Second Stretcher positioning hole, 205, locking plate, 20501, locking tooth, 20502, second spring mounting hole, 20503, third stretcher positioning hole, 20504, third mounting hole, 20505, first tooth groove, 20506, second tooth groove, 20507, locking part, 20508, pressure part, 20509, pressure end, 206, limit screw, 3, telescopic tube quick connector, 301, second base, 30101, fourth mounting hole, 302, quick pressure plate, 303, second nut, 3031, force handle, 304, screw, 4, stretcher, 5, electric drive cart. DETAILED DESCRIPTION

[0029] The technical solution of the present invention is further described in detail below with reference to the accompanying drawings:

[0030] See also Figure 1-10 The present invention provides a stretcher quick installation and separation structure for an electric-driven cart, comprising two support rods 1 symmetrically distributed along the length direction of the electric-driven cart 5, a stretcher combination and separation mechanism 2, and a telescopic tube quick connector 3. The two sides of the support rod 1 are respectively provided with a stretcher combination and separation mechanism 2 for detachably connecting to the stretcher support rod on the stretcher 4. The two ends of the support rod 1 are respectively provided with a telescopic tube quick connector 3 for detachably connecting to the telescopic tube of the electric-driven cart 5; see Figure 2 The support rod 1 includes a horizontal tube 101 and vertical tubes 102 fixedly connected to both ends of the horizontal tube 101. A circular hole 10102 is provided at each end of the horizontal tube 101. In this embodiment, the vertical tube 102 is welded to both ends of the horizontal tube 101. When welding, the center of the circular hole 10102 is located on the axis of the vertical tube 102. Figure 3As shown, four straight holes 10101 are symmetrically provided on both sides of the cross tube 101, and the two straight holes 10101 located on the same side are provided corresponding to the mounting through holes 20401 on the stretcher combining and separating mechanism 2. During installation, the mounting through holes 20401 on each stretcher combining and separating mechanism 2 are aligned with the corresponding straight holes 10101 on the cross tube 101 and then connected by bolts and nuts. When it is necessary to adjust the relative distance between the two stretcher combining and separating mechanisms 2 on the support rod 1, the structural design of the straight holes allows the stretcher combining and separating mechanism 2 to move in the length direction of the straight holes 10101 after loosening the nuts. When the appropriate relative distance is adjusted, the nuts can be retightened to fix the stretcher combining and separating mechanism 2, thereby adapting to stretchers of different widths.

[0031] See also Figure 1 and Figure 4 The stretcher combining and separating mechanism 2 includes a cover plate 201, a first base 204, a limiting screw 206, a limiting plate 203 and a locking plate 205 rotatably arranged between the cover plate 201 and the first base 204, as shown in FIG. Figure 5 As shown, the cover plate 201 is provided with two first mounting holes 20101 and a first stretcher positioning hole 20102, and the first stretcher positioning hole 20102 is used to place the stretcher support rod; Figure 7 As shown, the lower side of the limiting plate 203 is provided with a first spring mounting hole 20302, the upper side thereof is provided with a second mounting hole 20303, and the locking plate 205 is provided with a third mounting hole 20504; Figure 6As shown, two stepped bolt threaded holes 20403 are provided on the first base 204, and a bolt is sequentially passed through a first mounting hole 20101 and a second mounting hole 20303 and then screwed into a corresponding stepped bolt threaded hole 20403 to rotate the limit plate 204 between the cover plate 201 and the first base 204, and another bolt is sequentially passed through another first mounting hole 20101 and a third mounting hole 20503 and then screwed into another corresponding stepped bolt threaded hole 20403 to rotate the locking plate 205 between the cover plate 201 and the first base 204; a second stretcher positioning hole 20404 is provided on the first base; further, mounting through holes 204 are respectively provided on the left and right sides of the first base. 01, after the installation through hole 20401 and the corresponding straight hole 10101 are aligned and bolted together, the stretcher combined with the separation mechanism 2 can be detachably installed on the support rod 1; further, two limit screws 206 are provided on the first base 204, one of which is used to form a stop with the outer side of the limit plate away from the locking plate to limit the maximum rotation range of the limit plate, and the other limit screw is used to form a stop with the outer side of the locking plate away from the limit plate to limit the maximum rotation range of the limit plate. Under normal circumstances, the limit plate, the locking plate and the corresponding limit screws do not contact each other. The two limit screws 206 in this embodiment are installed in the two corresponding limit screw threaded holes 20402 on the first base 204.

[0032] See also Figure 7 , a locking tooth 20501 is provided on the side of the locking plate 205 close to the limiting plate 203, a first tooth groove 20505 is provided on the upper part of the locking tooth 20501, and a second tooth groove 20506 is provided on the lower part, and a limiting tooth 20304 is convexly provided on the side of the limiting plate 203 close to the locking plate 205 for engaging with the first tooth groove 20505 and the second tooth groove 20506; further, a first spring mounting hole 20302 for mounting the spring 202 is provided on the lower side of the limiting plate 203, and a second spring mounting hole 20502 for mounting the spring 202 is provided on the lower side of the locking plate 205; in the initial state (At this time, the stretcher is not assembled on the electric trailer), the limiting tooth 20504 on the limiting plate 203 is located in the second tooth groove 20506, and the spring 202 is in a natural state without force; the upper side of the locking plate 205 is provided with a third stretcher positioning hole 20503, the locking plate surrounding the third stretcher positioning hole 20503 from the upper side forms a locking portion 20507, and the locking plate surrounding the third stretcher positioning hole from the lower side forms a pressure portion 20508, and in the initial state, the pressure portion close to the pressure end 20509 of the locking plate is higher than the first stretcher positioning hole 20102 and the second stretcher positioning hole 20404; please refer to Figure 8When the stretcher 4 is placed on the stretcher separation and combination mechanism 2, the stretcher support rod is first placed into the first stretcher positioning hole, the second stretcher positioning hole and the third stretcher positioning hole 20503 and preferentially contacts the pressed end 20509 of the pressure portion close to the locking plate. After the stretcher support rod is pressed downward so that the pressed portion is subjected to downward pressure, the locking plate 205 rotates counterclockwise so that the bottom of the first stretcher positioning hole, the bottom of the second stretcher positioning hole and the pressed portion are at the same horizontal position. At this time, the spring 202 is stretched. During this process, the limiting tooth 20304 on the limiting plate 203 disengages from the second tooth groove 20506 until the tooth top position of the limiting tooth 20504 abuts against the tooth top position of the locking tooth 20501. The spring is stretched to its maximum length. At this time, the locking portion is located above the stretcher support rod and there is a certain distance between the two. Please refer to Figure 9 , then press the locking portion 20507 downwards, and the limit tooth 20304 slides into the first tooth groove 20505 under the elastic force provided by the spring and automatically locks. At this time, the stretcher support rod is pressed into the first stretcher positioning hole 20102 and the second stretcher positioning hole 20404 and then locked. The locked spring 202 is still in a stretched state, and the elastic force provided by the spring keeps the stretcher support rod in the aforementioned locked state. When the stretcher 4 needs to be removed, a handle 20301 is provided on the lower side of the limit plate 203. Pulling the handle 20301 causes the limit plate 203 to move. 3 is rotated clockwise, and the lower side of the locking plate 205 also rotates clockwise under the tension of the spring 202, and the locking portion 20507 of the locking plate 205 also rotates clockwise (to move away from the top of the stretcher support rod). At this time, since the stretcher 4 has not been removed from the stretcher positioning hole, the limiting tooth has not completely entered the second tooth groove 20505 (the spring is still in a stretched state). After the stretcher 4 is removed from the stretcher positioning hole, the limiting tooth 20304 completely enters the second tooth groove 20505 under the elastic force of the spring, and the spring 202 is restored to its original position. Figure 7 The initial state shown is that the stretcher 4 is locked and separated. During the whole process, a limit screw 206 is provided to prevent the limit plate 203 and the locking plate 205 from rotating too much clockwise or counterclockwise during the process of locking and separating the stretcher 4.

[0033] See also Figure 1 and Figure 10 The telescopic tube quick interface 3 includes a second base 301 and a quick pressure plate 302. The quick pressure plate 302 is designed as an arc structure, which is compatible with the telescopic tube on the electric-drive cart 5. One side of the quick pressure plate 302 is riveted to the second base 301 through a rotating shaft, and the other side of the quick pressure plate 302 is detachably connected to the second base 301.

[0034] When the telescopic tube quick connector 3 is installed on the support rod 1, a fourth mounting hole 30101 is provided on the second base 301 which corresponds to the axis of the vertical tube 102 on the support rod 1 and the center of the circular hole 10102. During installation, it can be connected to the support rod 1 by bolts and nuts, and a receiving groove for installing the bolt head is also reserved above the fourth mounting hole 30101, so that the telescopic rod can be quickly and accurately placed between the quick pressure plate 302 and the second base 301, which is convenient for subsequent operations; the other side of the quick pressure plate 302 is connected to the second base 301 by a second nut 303 and a screw 304. Specifically: a horizontal plate is extended from the other side of the quick pressure plate 302 and a U-shaped opening is opened on the horizontal plate, which extends in the vertical direction. After the lower end of the screw 304 passes through the U-shaped opening, it is placed on the second base 301 through the connecting shaft. The second nut 303 is screwed onto the screw 304 located above the U-shaped opening, and the second nut 303 is provided with two symmetrically distributed force handles. When the telescopic rod is fixed to the telescopic rod quick connector, the force handle is rotated forward to rotate the second nut 303 while moving downward in the vertical direction, thereby pressing the quick pressure plate 302, and the telescopic tube quick connector 3 is fixed to the telescopic rod of the electric drive trolley 5. When the telescopic rod needs to be detached from the telescopic tube quick connector, the force handle is rotated in the reverse direction until the second nut 303 is rotated out of the screw 304, and the quick pressure plate 302 is flipped over and the telescopic rod is taken out to complete the detachment of the telescopic tube quick connector 3 from the telescopic rod of the electric drive trolley 5.

[0035] In other embodiments of the present invention, buckles are provided on both side outer walls of the second base 301 and corresponding slots are provided inside the vertical tube 102 to replace the bolts and nuts used to connect the second base 301 and the support rod 1 in this embodiment.

[0036] In other embodiments of the present invention, a connecting shaft is no longer provided inside the second base 301 , and the top end of the screw can be directly screwed into the second base.

[0037] In other embodiments of the present invention, the outer wall of the second nut 303 may not be provided with a force applying handle, and the second nut 303 may be tightened or loosened by hand or with a wrench.

[0038] In other embodiments of the present invention, the number of mounting through holes 20401 on the first base 204 and the corresponding straight holes 10101 on the support rod 1 can be set as needed, for example: a mounting through hole 20401 is set at the lower part of the first base 204, and a straight hole 10101 is set on the corresponding side of the support rod.

[0039] In other embodiments of the present invention, the limiting screw threaded hole 20402 and the limiting screw 206 are no longer provided on the first base 204, and protrusions can be provided at corresponding positions instead.

[0040] In other embodiments of the present invention, the second base 301 is connected to the other side of the quick pressing plate 302 via other detachable structures, such as a buckle structure consisting of a buckle and a slot.

[0041] In other embodiments of the present invention, the vertical pipe 102 is no longer welded to the support rod 1. A connecting pipe extending in the vertical direction and passing through the fourth mounting hole is provided below the second base to connect the support rod and the second base through the connecting pipe.

[0042] In other embodiments of the present invention, only the first stretcher positioning hole can be provided on the cover plate 201, and the second stretcher positioning hole on the first base can be omitted. In this case, the height of the first base should be lower than the first stretcher positioning hole and the third stretcher positioning hole; or only the second stretcher positioning hole can be provided on the first base, and the first stretcher positioning hole on the cover plate can be omitted. In this case, the height of the cover plate should be lower than the first stretcher positioning hole and the third stretcher positioning hole.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention and are not limiting. Other modifications or equivalent substitutions made to the technical solution of the present invention by ordinary technicians in this field should be included in the scope of the claims of the present invention as long as they do not depart from the design and scope of the technical solution of the present invention.

Claims

1. A stretcher quick installation and separation structure for an electric-driven cart, characterized by: The invention comprises a support rod (1), a stretcher combining and separating mechanism (2), and a telescopic tube quick connector (3), wherein the two sides of the support rod are respectively provided with a stretcher combining and separating mechanism for connecting with the stretcher support rod, and the two ends of the support rod are respectively provided with a telescopic tube quick connector for connecting with the telescopic tube of the electric drive trailer (5); the stretcher combining and separating mechanism (2) comprises a cover plate (201), a first base (204), a limit plate (203) and a locking plate (205) rotatably arranged between the cover plate and the first base, one of the cover plate and the first base is provided with a stretcher positioning hole, and the two sides of the support rod are respectively connected to the first base; a limit tooth (20504) is convexly provided on the side of the limit plate close to the locking plate, and a locking tooth (20501) is provided on the side of the locking plate close to the limit plate, and the lower side of the locking tooth is provided with a second tooth groove (20503) for engaging with the limit tooth when the stretcher support rod is not placed in the stretcher positioning hole. 506), a third stretcher positioning hole (20503) is provided on the upper side of the locking plate, and the locking plate that blocks the third stretcher positioning hole from the lower side forms a pressure portion (20508) that preferentially contacts the stretcher support rod when the stretcher support rod is placed in the stretcher positioning hole to drive the locking plate to rotate and disengage the limiting tooth from the second tooth groove, and the locking plate that blocks the third stretcher positioning hole from the upper side forms a locking portion (20507) for limiting the stretcher support rod after the stretcher support rod is placed in the stretcher positioning hole, the upper side of the locking tooth is provided with a first tooth groove (20505) for engaging with the limiting tooth after the stretcher support rod is limited by the locking portion, a spring (202) that tends to keep the limiting tooth and the first tooth groove or the second tooth groove in an engaged state is provided between the locking plate and the limiting plate, and a handle (20301) is provided on the lower side of the limiting plate for driving the limiting plate to rotate so that the limiting tooth disengages from the first tooth groove.

2. The electric-drive stretcher quick installation and separation structure according to claim 1, characterized in that: The support rod (1) comprises a transverse tube (101), and the transverse tube (101) is provided with a straight hole (10101) corresponding to the mounting through hole (20401) on the first base (204).

3. The electric-drive stretcher quick installation and separation structure according to claim 2, characterized in that: The support rod further comprises vertical tubes (102) connected to both ends of the horizontal tube, and circular holes (10102) coaxial with the corresponding vertical tubes are provided at both ends of the horizontal tube.

4. The electric-drive stretcher quick installation and separation structure according to claim 1, characterized in that: The two ends of the spring (202) are respectively connected to the first spring mounting hole (20302) on the limiting plate (203) and the second spring mounting hole (20502) on the locking plate (205).

5. The electric-drive stretcher quick installation and separation structure according to claim 1, characterized in that: The cover plate (201) is provided with two first mounting holes (20101), the limiting plate (203) is provided with a second mounting hole (20303), the locking plate (205) is provided with a third mounting hole (20503), and the first base (204) is provided with two step bolt threaded holes (20403). A step bolt is sequentially passed through the first mounting hole (20101) and the second mounting hole (20303) and then screwed into the corresponding step bolt threaded hole (20403). Another step bolt is sequentially passed through another first mounting hole (20101) and the third mounting hole (20503) and then screwed into another corresponding step bolt threaded hole (20403).

6. The electric-drive stretcher quick installation and separation structure according to claim 1, characterized in that: Two limiting screws (206) are also provided on the first base (204), one limiting screw is used to form a stop fit with the outer side of the limiting plate away from the locking plate, and the other limiting screw is used to form a stop fit with the outer side of the locking plate away from the limiting plate.

7. The electric-drive stretcher quick installation and separation structure according to claim 1, characterized in that: The telescopic tube quick connector (3) comprises a second base (301) and a quick pressure plate (302). One side of the quick pressure plate (302) is connected to the second base (301) via a rotating shaft, and the other side is detachably connected to the second base (301). Both ends of the support rod (1) are respectively connected to the second base (301).

8. The electric-drive stretcher quick installation and separation structure according to claim 7, characterized in that: A U-shaped opening is provided on the other side of the quick pressure plate (302). The lower end of a screw (304) extending in the vertical direction passes through the U-shaped opening and is arranged on the second base (301) through a connecting shaft. A second nut (303) is screwed onto the screw (304) located above the U-shaped opening.

9. The electric-drive stretcher quick installation and separation structure according to claim 8, characterized in that: The second nut (303) is provided with two symmetrically distributed force-applying handles (3031).

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