Tractor

Abstract

The invention provides a tractor which comprises a traction assembly, and the traction assembly comprises an installation shell; the traction rod body is arranged in the mounting shell, one end of the traction rod body is connected with a mounting piece, and the mounting piece is used for being connected with the joint fixing piece; and the adjusting mechanism is connected with the traction rod body and is used for adjusting the traction rod body to move and stretch out and draw back in the mounting shell. Due to the fact that the traction rod body can move and stretch out and draw back in the installation shell through the adjusting mechanism, and one end of the traction rod body is provided with the joint fixing sleeve piece matched with the arthroscopic surgery through the installation piece, the joint fixing sleeve piece pulls the human body joint to move under the driving of moving and stretching out and drawing back of the traction rod body, and tension on soft tissue can be kept; the adjustable shoulder arthroscopy device effectively meets operation requirements of shoulder arthroscopy operation, improves operation efficiency of the shoulder arthroscopy, shortens operation time, and has the advantages of being simple in structure, easy and convenient to operate and low in cost.

Description

Technical Field

[0001] The invention relates to the field of tractors, and in particular to a tractor. Background Art

[0002] The shoulder joint is the joint with the largest range of motion in the human body. The anatomical structure of the shoulder joint is a ball-and-socket structure, and its special structure determines the instability of the shoulder joint. With the change of human lifestyle, more and more people participate in sports, and various shoulder joint sports injuries have gradually become important diseases that affect people's quality of life and sports ability.

[0003] Among them, shoulder arthroscopy has become the preferred option for doctors to diagnose and treat shoulder joint diseases due to its advantages such as less trauma, less tissue adhesion, and faster postoperative recovery. In arthroscopic surgery, continuous traction of the shoulder joint is crucial. Traction can not only fully expose the surgical field, but also maintain tension on the soft tissue and reduce swelling caused by joint cavity irrigation after surgery.

[0004] However, the joint traction devices currently on the market have the problem of being complicated to operate. Summary of the invention

[0005] In order to overcome the deficiencies of the prior art, the technical solution adopted by the present invention to solve the technical problems is:

[0006] The present invention provides a tractor, characterized in that it comprises a traction assembly, wherein the traction assembly comprises:

[0007] Install the housing;

[0008] A traction rod body, the traction rod body is arranged in the mounting shell, one end of the traction rod body is connected to a mounting piece, and the mounting piece is used to connect with the joint fixing piece;

[0009] An adjusting mechanism is connected to the traction rod body, and is used to adjust the movement and extension of the traction rod body in the mounting shell.

[0010] The beneficial effects of the present invention are as follows: the present invention provides a traction device, including a traction assembly, the traction assembly including: a mounting shell; a traction rod body, the traction rod body is arranged in the mounting shell, one end of the traction rod body is connected to a mounting piece, the mounting piece is used to connect with a joint fixing piece; an adjustment mechanism, the adjustment mechanism is connected to the traction rod body, the adjustment mechanism is used to adjust the movement and extension of the traction rod body in the mounting shell. Since the traction rod body can move and extend in the mounting shell through the adjustment mechanism, and one end of the traction rod body is installed with a joint fixing kit adapted for arthroscopic surgery through the mounting piece, under the drive of the movement and extension of the traction rod body, the joint fixing kit pulls the human joint to move, and can maintain the tension on the soft tissue, effectively meeting the operation requirements of shoulder arthroscopic surgery, improving the surgical efficiency of shoulder arthroscopic surgery, shortening the operation time, and at the same time having the advantages of simple structure, easy operation and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. The drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0012] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0013] Figure 1 It is a schematic diagram of the overall structure of the tractor of the present invention;

[0014] Figure 2 is an exploded diagram of the traction assembly and the mechanical arm assembly of the present invention;

[0015] Figure 3 yes Figure 2 A magnified image;

[0016] Figure 4 is a schematic structural diagram of a traction assembly of the present invention;

[0017] Figure 5 is a cross-sectional view of a traction assembly of the present invention;

[0018] Figure 6 is an exploded view of the traction assembly of the present invention;

[0019] Figure 7 is a partial internal structure diagram of the mechanical arm assembly of the present invention;

[0020] Figure 8 yes Figure 7 Enlarged view of point B;

[0021] Fig. 9 It is a structural schematic diagram of the locking mechanism of the present invention;

[0022] Fig.10 It is a partial structural schematic diagram of the locking mechanism of the present invention;

[0023] Fig.11 is an exploded view of the locking mechanism of the present invention;

[0024] Fig.12 is a schematic structural diagram of a first locking pin of a locking mechanism of the present invention;

[0025] Fig.13 It is a structural schematic diagram of a first locking disk of the locking mechanism of the present invention;

[0026] Fig.14 is a cross-sectional view of a tractor of the present invention;

[0027] Fig.15 yes Fig.14 Enlarged view of point C;

[0028] Fig.16 yes Fig.14 Enlarged view at E;

[0029] Fig.17 yes Fig.14 Enlarged view of point F;

[0030] Fig.18 is a schematic diagram of the overall structure of the tractor of the present invention from another perspective;

[0031] Fig.19 yes Fig.18 Enlarged view at G;

[0032] Fig. 20 is a cross-sectional view of the present invention cut along the second unlocking axis and the adjustment hole;

[0033] Fig.21 yes Fig. 20 Enlarged view at H;

[0034] Fig. 22 It is an exploded schematic diagram of the locking device of the traction assembly and the mechanical arm assembly of the present invention;

[0035] Fig.23 yes Fig. 22 Enlarged view at I;

[0036] Fig.24 is a schematic structural diagram of the adjustable fixing mechanism of the present invention;

[0037] Fig.25 It is an exploded view of the adjustable fixing mechanism of the present invention. DETAILED DESCRIPTION

[0038] refer to Figures 1 to 25A tractor includes a traction assembly 10, wherein the traction assembly 10 includes:

[0039] Install the housing 1;

[0040] A traction rod body 2, the traction rod body 2 is arranged in the mounting housing 1, one end of the traction rod body 2 is connected to a mounting member 21, and the mounting member 21 is used to connect to the joint fixing member;

[0041] The adjusting mechanism 3 is connected to the traction rod body 2 and is used to adjust the movement and extension of the traction rod body 2 in the mounting housing 1 .

[0042] Among them, the mounting member 21 can be connected to various joint fixing members, including but not limited to a shoulder joint lateral position kit, an elbow joint kit, a wrist joint kit, a knee joint kit, and an ankle joint kit.

[0043] Through the above structure, since the traction rod body 2 can move and retract in the mounting shell 1 through the adjustment mechanism 3, and one end of the traction rod body 2 is installed with a joint 8 fixing kit adapted for arthroscopic surgery through the mounting part 21, driven by the movement and extension of the traction rod body 2, the joint 8 fixing kit pulls the human joint 8 to move and can maintain tension on the soft tissue, effectively meeting the operational requirements of shoulder arthroscopic surgery, improving the surgical efficiency of shoulder arthroscopic surgery, shortening the operation time, and at the same time having the advantages of simple structure, easy operation and low cost.

[0044] In this embodiment, a buffer device 4 is also included, and the buffer device 4 is connected between the traction rod body 2 and the adjustment mechanism 3; the adjustment mechanism 3 includes an adjustment shell 31 sleeved on the traction rod body 2 and an adjustment member 32 drivingly connected to the adjustment shell 31, and a mounting groove 311 is provided at the rear end of the adjustment shell 31, and a pushing member 33 sleeved on the traction rod body 2 and a buffer device 4 are provided in the mounting groove 311, and a fixing member 22 is fixedly sleeved at the tail end of the traction rod body 2, and the buffer device 4 is pressed between the pushing member 33 and the fixing member 22, so that the fixing member 22 is pressed against the bottom wall of the mounting groove 311; when the adjustment member 32 rotates in a first direction, the adjustment shell 31 moves toward the fixing member 22, so that the bottom wall of the mounting groove 311 drives the pushing member 33, the buffer device 4 and the fixing member 22 to move in turn, thereby driving the traction rod body 2 to move in the adjustment shell 31 toward the fixing member 22. Specifically, the fixing member 22 is connected to the tail end of the adjustment shell 31 by threads.

[0045] Through the above structure, the adjusting shell 31 can be driven to move backward by rotating the adjusting member 32 in the first direction, and the bottom wall of the mounting groove 311 pushes the pushing member 33 to move backward, and the pushing member 33 pushes the buffer device 4 to move. Under the buffering action of the buffer device 4, the thrust will act on the fixing member 22 more slowly. Since the fixing member 22 is fixedly connected to the traction rod body 2, the traction rod body 2 will move with the movement of the fixing member 22, thereby effectively realizing that the traction rod body 2 drives the joint 8 fixing kit to move, thereby meeting the operational requirements of arthroscopic surgery.

[0046] Furthermore, the buffer device 4 is a first spring 41, which is sleeved on the adjustment housing 31 and pressed tightly between the pusher 33 and the fixing member 22. With the above structure, since the buffer device 4 is a spring, when the adjustment member 32 is rotated in the first direction, the first spring 41 is squeezed under the thrust of the pusher 33, and the traction rod body 2 can be pushed only after overcoming the elastic force of the first spring 41, thereby avoiding the damage to the human joint 8 caused by the excessive movement of the traction rod body 2, and effectively playing a role of buffering and increasing safety.

[0047] Furthermore, the adjustment shell 31 is also provided with a limit groove 312, and the traction rod body 2 is provided with a limit piece 23 and is located in the limit groove 312, and the limit groove 312 has a first limit wall 3121 and a second limit wall 3122 relative to each other; when the adjustment piece 32 rotates in the second direction, the adjustment shell 31 moves toward the mounting piece 21, so that the second limit wall 3122 drives the limit piece 23 to move, thereby driving the traction rod body 2 to move in the adjustment shell 31 toward the mounting piece 21; when the adjustment piece 32 rotates in the first direction, the traction rod body 2 moves toward the fixing piece 22 until the limit piece 23 abuts against the first limit wall 3121.

[0048] Specifically, the limiting member 23 is a second screw 231 , and the second screw 231 is disposed through the traction rod body 2 .

[0049] Through the above structure, when the adjusting member 32 is rotated in a second direction different from the first direction, the adjusting shell 31 moves forward, and the limiting wall in the limiting groove 312 presses against the limiting member 23 to drive the traction rod body 2 to move forward, thereby effectively, quickly and simply realizing the forward and backward movement adjustment of the traction rod body 2; and when the traction rod body 2 moves backward to a certain extent, the limiting member 23 will abut against the first limiting wall 3121 to prevent the traction rod body 2 from moving backward excessively, thereby straining the human body joint 8 and causing irreversible damage, thereby effectively playing a protective role.

[0050] In this embodiment, the adjusting member 32 is an adjusting sleeve 321 , an internal thread 3212 is provided in the adjusting sleeve 321 , an adjusting ring 314 is protruded from the adjusting housing 31 , and an external thread 3141 meshing with the internal thread 3212 is provided on the adjusting ring 314 .

[0051] Furthermore, an installation inner shell 5 is further provided between the installation outer shell 1 and the adjustment shell 31, a limiting ring 51 is provided on the installation inner shell 5, a limiting ring groove 3211 is provided on the inner wall of the adjustment sleeve 321, and the limiting ring 51 is tightly matched with the limiting ring groove 3211, so that the adjustment sleeve 321 can rotate around the installation inner shell 5. Through the above structure, the limiting ring 51 is tightly matched with the limiting ring groove 3211, so that the adjustment sleeve 321 can rotate in place, and then the adjustment shell 31 is driven to move forward and backward through the meshing of the internal thread 3212 and the external thread 3141, so as to effectively realize the mobile traction function of the traction rod body 2.

[0052] In this embodiment, a flexible sleeve 313 is further sleeved on one end of the adjustment housing 31 close to the mounting member 21, and the flexible sleeve 313 is arranged between the mounting inner housing 5 and the adjustment housing 31; the first screw 52 passes through the mounting inner housing 5, the flexible sleeve 313 and the adjustment housing 31 in sequence to fix the flexible sleeve 313 between the mounting inner housing 5 and the adjustment housing 31. Through the above structure, the flexible sleeve 313 prevents external dust and liquid from invading the interior and protects the tractor.

[0053] In this embodiment, the mounting shell 1 is provided with a locking clip 11, and the locking clip 11 is used to clamp the mounting shell 1 on the mounting inner shell 5. Through the above structure, when the locking clip 11 is pressed down, the mounting shell 1 can be firmly clamped on the mounting inner shell 5, ensuring the safety and firmness of the traction component 10 when performing traction movement, and after twisting upward to open, the installation positions of the mounting shell 1, the mounting inner shell 5 and other components can be adjusted.

[0054] In this embodiment, the tractor further includes a mechanical arm assembly 20, and the traction assembly 10 is detachably connected to the mechanical arm assembly 20 via a locking device 6. Through the above structure, the mechanical arm assembly 20 plays a role in supporting and assisting the traction assembly 10, and because the mechanical arm assembly 20 is detachably connected via the locking device 6, it is convenient to quickly separate and combine the mechanical arm assembly 20 and the traction assembly 10, and it is convenient to flexibly configure mechanical arms of different specifications according to needs.

[0055] In this embodiment, a connecting column 12 is provided at the lower end of the mounting shell 1, and a connecting tube 201 is provided at the upper end of the robot arm assembly 20. The locking device 6 includes a first locking piece provided on the connecting tube 201 and a locking fitting piece provided on the connecting column 12. When the connecting column 12 is plugged into the connecting tube 201, the first locking piece and the locking fitting piece are connected in cooperation so that the traction assembly 10 and the robot arm assembly 20 can be detachably connected.

[0056] Furthermore, the first locking member includes a button 61, a stop ring 62 connected to the button 61, and a second spring 63 connected to the connecting tube 201 and pressed against the connecting tube 201 and the button 61. The first locking member also includes a hollow groove 2011 provided on the connecting tube 201, and the stop ring 62 can move in the hollow groove 2011. The locking fitting includes a stop ring groove 121 provided on the connecting column 12 and flush with the stop ring 62. When the button 61 is pressed, the spring is squeezed, and the stop ring 62 moves in a direction away from the connecting column 12, and the stop ring 62 is disconnected from the stop ring groove 121, and the connecting column 12 can move in the connecting tube 201. When the button 61 is released, the spring rebounds, and the stop ring 62 moves in a direction close to the connecting column 12 until the stop ring 62 is engaged with the stop ring groove 121, so that the connecting column 12 is locked and connected to the connecting tube 201. Specifically, a mounting column 2012 is provided on the outer wall of the connecting pipe 201 , and the second spring 63 is sleeved on the mounting column 2012 .

[0057] Through the above structure, the button 61 locking structure is combined with the spring rebound mechanism, and the connecting column 12 and the connecting tube 201 can be quickly locked or unlocked by pressing or releasing the button 61 with one hand without tools, which greatly improves assembly efficiency and operation convenience.

[0058] In this embodiment, the mechanical arm assembly 20 includes:

[0059] A plurality of retaining members 7, wherein adjacent retaining members 7 are connected via joints 8;

[0060] The locking mechanism 9 is located at the connection between the retaining member 7 and the joint 8. When the locking mechanism 9 is in the locked state, the locking mechanism 9 controls the rigid connection between the retaining member 7 and the joint 8; when the locking mechanism 9 is in the unlocked state, the locking mechanism 9 controls the rotatable connection between the retaining member 7 and the joint 8;

[0061] A connecting rod mechanism 30, wherein adjacent locking mechanisms 9 are connected via the connecting rod mechanism 30;

[0062] The unlocking mechanism 40 is connected to the locking mechanism 9 closest to the traction assembly 10 , and the unlocking mechanism 40 can be manipulated by an external force to control the locking mechanism 9 to unlock or lock.

[0063] In this embodiment, the mechanical arm is specifically an axial type mechanical arm, which can be manually operated by a user to unlock the mechanical arm. The mechanical arm can be used in the medical field, and can also be used in other fields requiring support, which is not limited here.

[0064] In this embodiment, the unlocking mechanism 40 includes a housing 401 , a mounting seat 410 is connected to the top of the housing 401 , and the mounting seat 410 is fixedly connected to the connecting pipe 201 through a threaded connection.

[0065] In this embodiment, the unlocking mechanism 40 includes:

[0066] A conversion mechanism 420, the conversion mechanism 420 includes a fixed rod 421 and a slider 422 slidably connected to the fixed rod 421;

[0067] A force application rod 430, one end of which is rotatably connected to the slider 422;

[0068] A trigger rod 440 , one end of which is rotatably connected to the slider 422 , and the other end of which is connected to the locking mechanism 9 .

[0069] Through the above structure, when external force is applied to the force rod 430, the force rod 430 drives the slider 422 to slide along the fixed rod 421, thereby driving the trigger rod 440 to move, triggering the locking mechanism 9 to unlock; when no external force is applied to the force rod 430, the force rod 430 is reset, and similarly, the slider 422 drives the trigger rod 440 to lock the locking mechanism 9.

[0070] In this embodiment, the unlocking mechanism 40 further includes a handle 402, a fixing rod 421 is fixedly connected to the housing 401, the handle 402 is rotatably connected to the housing 401, and an end of the force-applying rod 430 away from the slider 422 is rotatably connected to the handle 402. The conversion mechanism 420 is located in the housing. In this embodiment, the housing is an elongated housing. When an external force is applied to the handle 402, it is applied to the force-applying rod 430.

[0071] Through the above structure, when external force is applied to the force rod 430, the locking mechanism 9 can be triggered to unlock; when the external force is separated from the force rod 430, in order to facilitate the automatic reset of the force rod 430, two springs are sleeved on the fixed rod 421, and the two springs are respectively located on both sides of the slider 422. When the external force is separated from the force rod 430, the reset of the spring drives the force rod 430 to reset on the one hand, and drives the trigger rod 440 to reset on the other hand, so that the locking mechanism 9 is restored from the unlocked state to the locked state.

[0072] In this embodiment, the connecting rod mechanism 30 includes:

[0073] A connecting member 310, the body of the connecting member 310 is rotatably connected to the shell of the retaining member 7;

[0074] A first unlocking shaft 320, one end of which is connected to a locking mechanism 9, and the other end of which is rotatably connected to a first end of a connecting member 310;

[0075] The second unlocking shaft 330 has one end rotatably connected to the second end of the connecting member 310 , and the other end connected to another locking mechanism 9 .

[0076] Through the above structure, the connecting member 310 is an L-shaped rigid connecting rod, and the inflection point of the L-shaped rigid connecting rod is rotatably connected to the housing of the retaining member 7. The L-shaped rigid connecting rod transmits the movement of the first unlocking shaft 320 to the second unlocking shaft 330. The unlocking mechanism 40 is connected to the locking mechanism 9 located at one end, and the trigger rod 440 of the unlocking mechanism 40 is used to trigger the unlocking of the locking mechanism 9. The movement of the locking mechanism 9 is transmitted to the next locking mechanism 9 through the connecting rod mechanism 30, so the second unlocking shaft 330 is used to trigger the unlocking of the next locking mechanism 9.

[0077] In this embodiment, at least one second unlocking shaft 330 is a spliced ​​unlocking shaft, and the second unlocking shaft 330 is formed by at least two sections of unlocking shaft units 331 that are telescopically spliced.

[0078] Through the above structure, the spliced ​​unlocking shaft can realize adaptive adjustment of the unlocking shaft length through the telescopic splicing structure, which can flexibly match the spacing changes of different locking mechanisms 9 or the displacement of the connecting rod movement trajectory, ensuring the continuity and reliability of the force transmission path, and the telescopic splicing structure can extend the service life.

[0079] In this embodiment, the first unlocking shaft 320 and the second unlocking shaft 330 are both spliced ​​unlocking shafts, and the first unlocking shaft 320 is formed by at least two sections of unlocking shaft units 331 that are telescopically spliced.

[0080] In this embodiment, the two sections of the unlocking shaft units 331 are connected by threads, wherein the housing of at least one section of the unlocking shaft unit 331 is a polygonal housing 3311; the housing of at least one of the retaining members 7 has an adjustment hole 71, the position of the adjustment hole 71 corresponds to the polygonal housing 3311, and a wrench can pass through the adjustment hole 71 and fit and clamp with the polygonal housing 3311 to adjust the telescopic length between the two sections of the unlocking shaft units 331. Through the above structure, the position of the adjustment hole 71 and the polygonal housing 3311 are designed to correspond, allowing the telescopic length calibration to be completed directly by passing an external wrench through the adjustment hole 71 without disassembling the connecting rod mechanism 30, greatly simplifying the debugging process and reducing the complexity of the operation.

[0081] In this embodiment, the locking mechanism 9 includes a first coupling body 91 and a second coupling body 92 that can be selectively connected. One of the first coupling body 91 and the second coupling body 92 is connected to the retaining member 7, and the other is connected to the joint 8. The first coupling body 91 and the second coupling body 92 are connected to achieve a rigid connection between the retaining member 7 and the joint 8.

[0082] Specifically, the first matching body 91 includes: a first turntable 911, connected to the retaining member 7, and a through hole 9111 is axially opened on the first turntable 911; a first locking pin 912 is slidably connected to the through hole 9111; a first force-applying element 913, connected to the unlocking mechanism 40 and engaged with the first locking pin 912, and is used to drive the first locking pin 912 to move axially; the second matching body 92 includes: a first locking disk 921, connected to the joint 8, and a plurality of first locking grooves 9211 are circumferentially opened on the first locking disk 921, and the first locking pin 912 can be inserted into the first locking groove 9211.

[0083] Specifically, the axial direction is the direction of the axis D, around which the retaining member 7 and the joint 8 can rotate relative to each other.

[0084] Through the above structure, when the first force-applying element 913 applies force to the first locking pin 912 in the axial direction, so that the first locking pin 912 is disengaged from the first locking groove 9211, the first rotating disk 911 and the first locking disk 921 can rotate relative to each other, that is, the retaining member 7 and the joint 8 can rotate relative to each other. When the first locking pin 912 is subjected to a force in the opposite direction, so that the first locking pin 912 is plugged into the first locking groove 9211, the first rotating disk 911 and the first locking disk 921 are fixedly connected, that is, the retaining member 7 and the joint 8 are rigidly connected. Specifically, in the locking mechanism 9 connected to the unlocking mechanism 40, one end of the first force element 913 is connected to the trigger rod 440, and the other end is connected to the first unlocking shaft 320; the first unlocking shaft 320 is connected to the next locking structure through the connecting member 310 and the second unlocking shaft 330 to transmit the movement; that is, in the next locking mechanism 9, one end of the first force element 913 is connected to the second unlocking shaft 330 of the connecting rod mechanism 30, and the other end is connected to the first unlocking shaft 320 in the next connecting rod mechanism 30, and so on.

[0085] In this embodiment, the first matching body 91 also includes: a pre-tightening disc 914, which is connected to the retaining member 7 and is spaced apart from the first rotating disk 911; a first pre-tightening element 915, one end of which is connected to the pre-tightening disc 914, and the other end is connected to the first locking pin 912; the first locking pin 912 includes a pin body 9121 and an engaging portion 9122 located at one end of the pin body 9121, and a locking pin groove 9123 is provided on the pin body 9121, and the first force-applying element 913 is engaged with the locking pin groove 9123, and the engaging portion 9122 can be inserted into the first locking groove 9211; the engaging portion 9122 is symmetrically provided with a first arc surface 91221 and a second arc surface 91222, and the internal shape of the first locking groove 9211 is adapted to the shape of the engaging portion 9122. Through the above structure, when the first force-applying element 913 applies axial force to the first locking pin 912 so that the first locking pin 912 is disengaged from the first locking groove 9211, the first pre-tightening element 915 is compressed; when the first pre-tightening element 915 recovers its deformation, the first locking pin 912 is engaged with the first locking groove 9211.

[0086] Furthermore, the first locking pin 912 includes a pin body 9121 and an engaging portion 9122 located at one end of the pin body 9121, and the engaging portion 9122 can be inserted into the first locking groove 9211. The engaging portion 9122 is provided to facilitate plugging with the first locking groove 9211. An accommodating hole 9124 is provided at one end of the pin body 9121 away from the engaging portion 9122, and a portion of the first preload element 915 is located in the accommodating hole 9124.

[0087] Furthermore, when the engaging portion 9122 of the first locking pin 912 is inserted into the first locking groove 9211, the first arc surface 91221 and the second arc surface 91222 respectively form a complete surface contact with the two arc surfaces in the first locking groove 9211, so that the two contacting surfaces respectively form blocking surfaces for locking the clockwise relative torsion and the counterclockwise relative torsion of the first matching body 91 and the second matching body 92. In other words, the arrangement of the first arc surface 91221 and the second arc surface 91222 ensures that even if only one engaging portion 9122 of the first locking pin 912 is inserted into the first locking groove 9211 and the arc surface contacts, the first matching body 91 and the second matching body 92 can be locked in both the clockwise and counterclockwise relative rotation directions.

[0088] Furthermore, the number of the first locking grooves 9211 is greater than the number of the first locking pins 912. Thus, the angular distance between two directly adjacent first locking pins 912 is different from the angular distance between two adjacent first locking grooves 9211. Thus, the cursor configuration of the first locking pins 912 relative to the first locking grooves 9211 makes it possible to have no limit on the angle of rotation when the retaining member 7 and the joint 8 rotate relative to each other, which is flexible and practical.

[0089] Furthermore, a locking pin groove 9123 is provided on the pin body 9121, and the first force element 913 is engaged with the locking pin groove 9123. A plurality of first locking pins 912 are arranged around the first force element 913, and the edge of the first force element 913 is located in the locking pin groove 9123. Because the locking pin groove 9123 has a certain length in the axial direction, when the first force element 913 moves a sufficient length in the axial direction, it can drive the first locking pin 912 to disengage from the first locking groove 9211 in the axial direction; when the first force element 913 is reset in the axial direction, because the locking pin groove 9123 has a certain length in the axial direction, the first force element 913 does not apply force to the first locking pin 912, but the first preload element 915 drives the first locking pin 912 to engage with the first locking groove 9211 in order to restore the deformation.

[0090] In summary, when external force is applied to the handle 402, the trigger rod 440 is driven to move through the conversion mechanism 420, and the trigger rod 440 drives the first force-applying element 913 of the locking mechanism 9 connected thereto to move axially, and the first force-applying element 913 drives the first locking pin 912 to move axially and disengage from the first locking groove 9211, and at the same time, the first pre-tightening element 915 is compressed; the first force-applying element 913 transmits the motion to the next unlocking mechanism 40 through the connecting rod mechanism 30, thereby simultaneously unlocking all the retaining members 7 and the joints 8. When the external force is released from the handle 402, the trigger rod 440 is reset, the first force-applying element 913 is reset, and the first pre-tightening element 915 recovers its deformation, thereby pushing the first locking pin 912 to move axially and plug into the first locking groove 9211; at the same time, the first force-applying element 913 transmits the motion to the next unlocking mechanism 40 through the connecting rod mechanism 30, thereby locking the retaining member 7 and the joint 8.

[0091] In this embodiment, the mechanical arm assembly 20 further includes an adjustable fixing mechanism 50, which is connected to the rearmost retaining member 7, and is used to fix the mechanical arm assembly 20 on the bed frame 60. Through the above structure, the adjustable fixing mechanism 50 supports the rapid adaptation of the bed frame 60 with different thicknesses, shapes or materials to meet the needs of different environments.

[0092] Furthermore, the adjustable fixing mechanism 50 includes a fixing body 510, a fixing clamp block 520 slidably connected to the fixing body 510, and a second locking member 530 for locking the fixing member 22 to the fixing body 510. The second locking member 530 is slidably connected to the fixing clamp block 520. The fixing body 510 and the fixing clamp block 520 are surrounded by a locking space 540, and the locking space 540 is used to accommodate and fix to the bed frame 60. Through the above structure, through the adjustable locking space 540, the user can conveniently install and disassemble the mechanical arm assembly 20 according to different environments, reducing the complexity of the operation.

[0093] Furthermore, the second locking member 530 includes a head 531 and a tail 532. The top of the fixing member body 510 has a first mounting hole 511, the top of the fixing clamp block 520 has a second mounting hole 521, and the tail 532 passes through the first mounting hole 511 and is threadedly connected to the second mounting hole 521. Through the threaded connection between the locking member and the fixing clamp block 520, the size of the locking space 540 can be effectively adjusted, and it can be effectively adapted to different bedside frames or other occasions that require clamping and fixing.

[0094] Furthermore, the fixing body 510 includes a mounting portion 512 and a first oblique clamping arm 513 connected to the mounting portion 512, the mounting portion 512 has a mounting slot 5121, and the fixing clamping block 520 has a mounting slider 522 and a second oblique clamping arm 523 connected to the mounting slider 522; when the mounting slider 522 is connected with the mounting slot 5121, the first oblique clamping arm 513, the front wall of the mounting portion 512, the front wall of the mounting slider 522 and the second oblique clamping arm 523 are surrounded together to form a locking space 540. The above structure is simple in structure and ingenious in design, and a stable and adjustable locking space 540 is effectively formed.

[0095] The above is one or more implementation methods provided in combination with specific contents, and it is not intended that the specific implementation of the present invention is limited to these descriptions. Any similarity or similarity with the method, structure, etc. of the present invention, or any technical deduction or replacement made on the premise of the concept of the present invention, shall be regarded as the protection scope of the present invention.

Claims

1. A tractor, characterized in that: The invention comprises a traction assembly (10), wherein the traction assembly (10) comprises: a mounting shell (1); a traction rod body (2), wherein the traction rod body (2) is arranged in the mounting shell (1), and one end of the traction rod body (2) is connected to a mounting member (21), wherein the mounting member (21) is used to be connected to a joint fixing member; and an adjustment mechanism (3), wherein the adjustment mechanism (3) is connected to the traction rod body (2), and wherein the adjustment mechanism (3) is used to adjust the movement and extension of the traction rod body (2) in the mounting shell (1).

2. A tractor according to claim 1, characterized in that: The invention also comprises a buffer device (4), wherein the buffer device (4) is connected between the traction rod body (2) and the adjustment mechanism (3); the adjustment mechanism (3) comprises an adjustment housing (31) sleeved on the traction rod body (2) and an adjustment member (32) drivingly connected to the adjustment housing (31); a mounting groove (311) is provided at the rear end of the adjustment housing (31); a pushing member (33) sleeved on the traction rod body (2) and the buffer device (4) are provided in the mounting groove (311); a fixing member (22) is fixedly sleeved on the rear end of the traction rod body (2); and the buffer device (4) is provided in the mounting groove (311). The buffer device (4) is pressed against between the pushing member (33) and the fixing member (22) so that the fixing member (22) is pressed against the bottom wall of the installation slot (311); when the adjusting member (32) rotates in a first direction, the adjusting housing (31) moves toward the fixing member (22) so that the bottom wall of the installation slot (311) sequentially drives the pushing member (33), the buffer device (4) and the fixing member (22) to move, thereby driving the traction rod body (2) to move in the adjusting housing (31) toward the fixing member (22).

3. A tractor according to claim 2, characterized in that: The adjusting shell (31) is also provided with a limiting groove (312); the traction rod body (2) is provided with a limiting member (23) and is located in the limiting groove (312); the limiting groove (312) has a first limiting wall (3121) and a second limiting wall (3122) that are opposite to each other; when the adjusting member (32) rotates in the second direction, the adjusting shell (31) moves toward the mounting member (21), so that the second limiting wall (3122) drives the limiting member (23) to move, thereby driving the traction rod body (2) to move in the adjusting shell (31) toward the mounting member (21); when the adjusting member (32) rotates in the first direction, the traction rod body (2) moves toward the fixing member (22) until the limiting member (23) abuts against the first limiting wall (3121).

4. A tractor according to claim 3, characterized in that: The adjusting member (32) is an adjusting sleeve (321), an internal thread (3212) is provided in the adjusting sleeve (321), an adjusting ring (314) is protruded from the adjusting housing (31), and an external thread (3141) is provided on the adjusting ring (314) which is meshed with the internal thread (3212).

5. A tractor according to claim 4, characterized in that: An installation inner shell (5) is further provided between the installation outer shell (1) and the adjustment shell (31); a limiting ring (51) is provided on the installation inner shell (5); a limiting ring groove (3211) is provided on the inner wall of the adjustment sleeve (321); the limiting ring (51) and the limiting ring groove (3211) are tightly fitted together so that the adjustment sleeve (321) can rotate around the installation inner shell (5).

6. A tractor according to claim 3, characterized in that: The buffer device (4) is a first spring (41), which is sleeved on the adjustment housing (31) and pressed tightly between the pushing member (33) and the fixing member (22).

7. A tractor according to claim 5, characterized in that: A flexible sleeve (313) is also sleeved on one end of the adjusting shell (31) close to the mounting member (21); the flexible sleeve (313) is arranged between the mounting inner shell (5) and the adjusting shell (31); a first screw (52) passes through the mounting inner shell (5), the flexible sleeve (313) and the adjusting shell (31) in sequence to fix the flexible sleeve (313) between the mounting inner shell (5) and the adjusting shell (31).

8. A tractor according to claim 3, characterized in that: The limiting member (23) is a second screw (231), and the second screw (231) is arranged to penetrate the adjusting housing (31); the fixing member (22) is connected to the rear end of the adjusting housing (31) via a thread.

9. A tractor according to claim 5, characterized in that: The mounting outer shell (1) is provided with a locking clamp (11), and the locking clamp (11) is used to clamp the mounting outer shell (1) onto the mounting inner shell (5).

10. A tractor according to claim 1, characterized in that: The traction device further comprises a mechanical arm assembly (20), and the traction assembly (10) and the mechanical arm assembly (20) are detachably connected via a locking device (6).

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