CN112360909B - Tensile spring - Google Patents

Abstract

The invention discloses a tensile spring, which comprises a spring main body consisting of spring strips distributed spirally, wherein a first stretching assembly and a second stretching assembly are distributed in the spring main body in an opposite mode, auxiliary stretching pieces are arranged at the lower end of the first stretching assembly and the upper end of the second stretching assembly respectively, connecting assemblies are arranged among the auxiliary stretching pieces, the first stretching assembly and the second stretching assembly respectively, the auxiliary stretching pieces are fixedly connected with the first stretching assembly and the second stretching assembly through the connecting assemblies, and rope fixing pieces are arranged at the upper ends and the lower ends of the two auxiliary stretching pieces respectively. The device structure is as one-level buffering component through first tensile subassembly and the tensile subassembly cooperation spring main part of second, and supplementary tensile member constitutes as the second grade buffering, and both mutually support and slide the displacement tensile through the direction of guide block with fixed chock, realize the tensile effect of better buffering, improve the availability factor of device.

Description

Tensile spring

Technical Field

The invention relates to the technical field of tensile springs, in particular to a tensile spring.

Background

With the development of economy, the quality of life of people is continuously improved, and the pace of life is high, more and more families and individuals select pets as family members of daily companions and playmates for leisure time, the nature of the pets is good, and therefore the pets are taken out to become necessary activities of pet owners. In this case, the pet leash is an integral product for each pet owner.

The elastic pet pulling rope comprises a pulling rope body and a hardware lock catch, wherein the pulling rope body consists of a handle, a spring spiral line, a first connecting piece for connecting the handle and the spring spiral line, and a second connecting piece for connecting the spring spiral line and the hardware lock catch, and the handle and the first connecting piece and the second connecting piece and the hardware lock catch are connected through metal pull rings respectively. This pet elastic traction rope replaces the fag end part of pet haulage rope among the prior art with spring helix, and this spring helix is inside to be twined out a plurality of circles by alloy spring wire, has that toughness is good and good fatigue resistance, and spring helix has given very big elastic space when dragging the pet, has played buffering absorbing effect to the atress of pet, avoids causing the injury to it, also can control it well.

In the process of implementing the invention, the inventor finds that at least the following problems in the prior art are not solved: 1. among pet types, the pet dog has a large base number in families, and is a canine animal which is kept by people for eliminating silence or for entertainment purposes, or a canine which is kept for non-economic purposes, the pet dog has many types, particularly for large dogs, and the dog walking behavior after daily life is regarded as a mode of relaxing and decompressing body and mind, but for the large dogs, due to the nature of the large dogs, the pulling force in the running process is large, and compared with some women with short stature, the large dogs are easy to be injured due to the actions of running, pulling, scramming and the like, and the traditional traction equipment worn by the large dogs cannot well reduce the inertia force when pets rush and brake, and cannot reduce the dangerous situations, so that the use requirements of users are difficult to meet; 2. most retractors used for traditional large dogs adopt built-in tensile springs to form and are used for buffering the acting force of the pet dogs rushing, and the built-in tensile springs of the traditional retractors are used for a long time, so that the tensile effect is greatly reduced, the inertia buffering in the use process is difficult to meet the requirements of users, and the situations of short service life and low use efficiency of products are caused.

For this purpose, a tension spring is proposed.

Disclosure of Invention

The present invention is directed to a tension spring, which solves the above problems of the prior art.

In order to achieve the purpose, the invention provides the following technical scheme: a tensile spring comprises a spring main body consisting of spring strips distributed spirally, wherein a first stretching assembly and a second stretching assembly are distributed in the spring main body in an opposite mode, auxiliary stretching pieces are arranged at the lower end of the first stretching assembly and the upper end of the second stretching assembly respectively, connecting assemblies are arranged among the auxiliary stretching pieces, the first stretching assembly and the second stretching assembly respectively, the auxiliary stretching pieces are fixedly connected with the first stretching assembly and the second stretching assembly through the connecting assemblies, and rope fixing pieces are arranged at the upper ends and the lower ends of the two auxiliary stretching pieces respectively;

the first stretching assembly comprises first tie rods, arc-shaped connecting strips, fixing rings and clamping strips, the two ends of each arc-shaped connecting strip are fixedly connected with the first tie rods, the two first tie rods and the arc-shaped connecting strips jointly form a U-shaped structure, the top ends of the two first tie rods are fixedly connected with the fixing rings and the clamping strips, the clamping strips are located on one sides of the fixing rings, the fixing rings are distributed in a semi-ring structure, the clamping strips and the fixing rings of the semi-ring structure are located on the same horizontal line, the clamping strips are made of high-toughness metal materials, mounting gaps are reserved between the clamping strips and the fixing rings, the clamping strips and the fixing rings are clamped to the outer surfaces of the spiral spring strips at the top ends of the spring bodies through the mounting gaps, and the mounting gap intervals are larger than the section diameters of the spiral spring strips;

the first stretching assembly and the second stretching assembly are identical in structure, a second tie rod is arranged in the second stretching assembly, a first tie rod in the first stretching assembly and a second tie rod in the second stretching assembly are placed in a fitting mode, a fixed block and a guide block are arranged on the adjacent surfaces of the first tie rod and the second tie rod respectively, the fixed block is fixedly connected with the first tie rod, the guide block is fixedly connected with the second tie rod, the fixed blocks are distributed in a splayed structure, the guide blocks extend to the splayed structure fixed blocks to be fitted and movably connected, a heat insulation plate is arranged between the splayed structure fixed blocks, the heat insulation plate is fixedly connected to the outer surface of the first tie rod in an arc structure fitting mode, the radian of one end, close to the heat insulation plate, of the guide block is consistent with that of the heat insulation plate and is movably connected with the heat insulation plate in a fitting mode, the heat insulation plate is made of copper, the heat insulation plate is hollow, the fixed stop blocks and the guide blocks are made of high-toughness metal materials, strong magnets are connected to the adjacent surfaces of the two fixed stop blocks in an embedded mode, and the fixed stop blocks adsorb the guide blocks through the magnetic force of the strong magnets.

Preferably, supplementary tensile piece includes first sheetmetal, second sheetmetal, the quantity of second sheetmetal is two sets ofly, and its center that uses first tensile subassembly is midpoint symmetric distribution, two first sheetmetal is the arc structure and distributes, and its big or small structure is the same, the quantity of first sheetmetal is two sets ofly, and it is arc structure subtend distribution, adopt the articulated mode to be connected between the both ends of first sheetmetal and the second sheetmetal, first sheetmetal and second sheetmetal all adopt spring steel integral type production preparation.

Preferably, the connecting assembly comprises a T-shaped block, a sleeve, an inserting block, a butt joint groove, an inserting cavity, a fixed seat and a butt joint strip, the bottom end of the second metal sheet is provided with a mounting hole, the bottom end of the T-shaped block is welded with the sleeve in a seamless mode through the mounting hole at the bottom end of the second metal sheet, the inserting block is fixedly connected at the center position in the sleeve, the butt joint groove is formed in the corresponding position of the two sides of the outer surface of the sleeve, the butt joint groove and the outer wall of the sleeve are obliquely formed at an angle of 15-30 degrees, opposite threads are formed in the inner surface of the sleeve and the outer surface of the inserting block, the fixed seat is arranged below the sleeve, the inserting cavity is formed in the corresponding position of the inserting block in the fixed seat, the threads are formed in the outer surface of the fixed seat and the inner part of the inserting cavity, the butt joint strip is fixed at a position close to the lower end of the fixed seat, and corresponds to the butt joint groove, the sleeve, the inserting block, the fixing seat and the inserting cavity are in threaded connection, and when the rotary threads at the bottom end of the sleeve are connected to the bottom end of the fixing seat, the butt joint strip is buckled to the inner portion of the butt joint groove to be clamped and fixed.

Preferably, the bottom fixedly connected with slider of fixing base, and the slider is spherical structure, movable groove has been seted up to the surface upper end of arc connecting strip, and the movable groove cross-section becomes half spherical structure and spherical slider and coincide each other, and movable groove upper end opening width is less than spherical slider cross-section diameter, coupling assembling passes through slider and movable groove sliding connection and realizes the displacement on first drawknot pole and second drawknot pole.

Preferably, the rope mounting includes first arc connecting piece, second arc connecting piece, arc, elastic strip, tooth portion, movable block, the arc has been seted up to the inside of first arc connecting piece, the inside of arc is provided with the movable block, and the lower extreme fixedly connected with second arc connecting piece of movable block, the internal surface equidistance of arc is provided with a plurality of elastic strip, and the both ends and the arc internal surface fixed connection of elastic strip, the movable block of elastic strip surface roof pressure laminating, the arc sets up tooth portion with movable block one side, first arc connecting piece passes through tooth portion meshing with second arc connecting piece fixedly, the top and the first arc connecting piece fixed connection of second sheetmetal.

Preferably, fixedly connected with metal strip between the adjacent spring strip in the spring main part of constituteing by the heliciform distribution spring strip, and metal strip surface is glued and is had the rubber sleeve, the metal strip also is heliciform distribution and agrees with the spring main part, the metal strip is arc structure spiral distribution, and it comprises the elastic steel metal.

Compared with the prior art, the invention has the beneficial effects that:

1. when the device is used, a first stretching component and a second stretching component which are identical in structure are distributed in the spring main body in an opposite mode, the first stretching component and the second stretching component are fixed on the edge of the spring main body in a hanging and clamping mode through a fixing ring and a clamping strip hook of a semi-ring structure arranged at the bottom end of a first stretching rod and a second stretching rod, the first stretching rod and the second stretching rod are attached and are connected with a fixing block in a vertical sliding mode through a guide block, at the moment, a user fixes two ropes on rope fixing pieces on the first stretching component and the second stretching component respectively, during the artificial stretching process of a pet runner, firstly, the auxiliary stretching piece is used for primarily stretching and buffering, then the spring main body is correspondingly stretched and extruded through the first stretching component and the second stretching component to achieve buffering inertial impact force again, and the device is structurally characterized in that the first stretching component and the second stretching component are matched with the spring main body to serve as a primary buffering component, the auxiliary stretching piece is formed as a secondary buffer, the auxiliary stretching piece and the auxiliary stretching piece are matched with each other and stretched through the guiding sliding displacement of the guide block and the fixed block, and a better buffer anti-stretching effect is realized;

2. the first stretching assembly and the second stretching assembly are matched with the auxiliary stretching piece to stretch and compress the spring body, in order to ensure accurate stretching direction, stretching force can be accurately applied to the spring body, the first tie rod and the second tie rod in the structure realize accurate vertical displacement stretching through the fixed stop block matched guide block of the splayed structure, meanwhile, a small deviation can occur in the inevitable stretching direction of the spring, in order to avoid the guide block from being separated from the fixed stop block, the structure not only limits the guide block through the fixed stop block of the splayed structure, but also can reduce the probability of separation of the guide block to a certain degree through strong magnet magnetic adsorption of the adjacent surfaces of the guide block, the guide block and the fixed stop block are made of high-toughness metal materials, the structure has better extension deformation capacity, and the phenomenon that the stretching piece and the guide block are caused by excessive torque force in the stretching process is prevented, The fixed stopping block is broken, meanwhile, the heat insulation plate with the hollow structure prevents the first tie rod and the second tie rod from being in direct contact in the frequent stretching and displacement process of the first tie rod and the second tie rod, the guide block directly acts on the heat insulation plate in a displacement and friction mode on the fixed stopping block, and then the hollow structure of the heat insulation plate ensures good heat dissipation, so that damage caused by overhigh local friction temperature is avoided;

3. when the device works, the first stretching component and the second stretching component are matched with the auxiliary stretching component to carry out high-frequency stretching displacement, the compression spring body generates elastic deformation, so that certain damage can be inevitably generated when the structure is used for a long time, and the local structure is damaged and can not be used, therefore, the auxiliary stretching component, the first stretching component and the second stretching component are connected through the connecting component, when the device is used, the sleeve, the inserting block, the fixed seat and the inserting cavity are in threaded connection and are fixedly connected, in order to prevent accidental separation and damage, the butt joint groove and the butt joint strip are designed at the position, when the sleeve is in threaded connection with the fixed seat, the butt joint strip is kneaded by two hands, so that the butt joint strip is attached to the outer surface of the fixed seat, then the sleeve can further rotate to carry out downward displacement, when the butt joint strip corresponds to the position of the butt joint groove, the butt joint strip is clamped to the inside of the butt joint groove under the elastic reset, thereby the sleeve is difficult to break away from the fixing base under non-human-induced action to reduce the unexpected injury that the accident breaks away from and brings, the connection mode dismantled of this structure also can convenient to use person's equipment dismantlement change local part simultaneously, reduce cost drops into.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is an overall structural view of the present invention;

FIG. 2 is a combination view of a first tensioning assembly and an auxiliary tensioning member of the present invention;

FIG. 3 is an enlarged view of the invention at A in FIG. 1;

FIG. 4 is a combination view of a first tie bar and a second tie bar of the present invention;

FIG. 5 is a top view of the first and second tie rods of the present invention;

FIG. 6 is a view of the movable slot and slider combination of the present invention;

FIG. 7 is a structural view of the connection assembly of the present invention;

fig. 8 is a structural view of a rope fixing member of the present invention;

FIG. 9 is a combination view of a first arcuate connector and a second arcuate connector of the present invention.

Description of reference numerals:

1. a spring body; 11. a metal strip; 12. a rubber sleeve; 2. a first stretching assembly; 21. a first tie rod; 211. fixing the block; 212. a heat insulation plate; 22. an arc-shaped connecting strip; 221. a movable groove; 222. a slider; 23. a fixing ring; 24. clamping the strip; 3. a second stretching assembly; 31. a second tie rod; 311. a guide block; 4. an auxiliary tension member; 41. a first metal sheet; 42. a second metal sheet; 5. a rope fixing member; 51. a first arcuate connector; 52. a second arcuate connector; 53. an arc-shaped slot; 54. an elastic strip; 55. a tooth portion; 56. a movable block; 6. a connecting assembly; 61. a T-shaped block; 62. a sleeve; 63. the plugging is fast; 64. a butt joint groove; 65. a plug-in cavity; 66. a fixed seat; 67. and (6) butting the strips.

Detailed Description

In the following, the technical solutions in the embodiments of the present invention will be clearly and completely described with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.

Referring to fig. 1 to 9, the present invention provides a technical solution:

a tensile spring comprises a spring body 1 composed of spring strips distributed spirally, wherein a first stretching component 2 and a second stretching component 3 are distributed in the spring body 1 in an opposite mode, auxiliary stretching pieces 4 are arranged at the lower end of the first stretching component 2 and the upper end of the second stretching component 3 respectively, connecting components 6 are arranged between the auxiliary stretching pieces 4 and the first stretching component 2 and between the auxiliary stretching pieces 4 and the second stretching component 3 respectively, the auxiliary stretching pieces 4 are fixedly connected with the first stretching component 2 and the second stretching component 3 through the connecting components 6, and rope fixing pieces 5 are arranged at the upper ends and the lower ends of the two auxiliary stretching pieces 4 respectively;

the first stretching component 2 comprises a first draw rod 21, an arc connecting strip 22, a fixing ring 23 and a clamping strip 24, the two ends of the arc-shaped connecting strip 22 are fixedly connected with first tie rods 21, the two first tie rods 21 and the arc-shaped connecting strip 22 form a U-shaped structure together, the top ends of the two first tie rods 21 are fixedly connected with a fixing ring 23 and a clamping strip 24, the clamping strips 24 are positioned at one side of the fixing ring 23, the fixing ring 23 is distributed in a semi-ring structure, the clamping strips 24 and the fixing rings 23 of the semi-ring structure are positioned on the same horizontal line, the clamping strips 24 are made of high-toughness metal materials, a mounting gap is reserved between the clamping strip 24 and the fixing ring 23, the clamping strip 24 and the fixing ring 23 are clamped and hooked to the outer surface of the spiral spring strip at the top end of the spring main body 1 through the mounting gap, and the distance between the mounting gaps is larger than the diameter of the section of the spiral spring strip;

the first stretching component 2 and the second stretching component 3 have the same structure, the second stretching component 3 is provided with a second tie rod 31, wherein the first tie rod 21 in the first stretching component 2 is attached to the second tie rod 31 in the second stretching component 3, the adjacent surfaces of the first tie rod 21 and the second tie rod 31 are respectively provided with a fixed block 211 and a guide block 311, the fixed block 211 is fixedly connected with the first tie rod 21, the guide block 311 is fixedly connected with the second tie rod 31, the fixed block 211 is distributed in a splayed structure, the guide block 311 extends to the splayed structure fixed blocks for attachment and movable connection, a heat insulation board 212 is arranged between the splayed structure fixed blocks 211, the heat insulation board 212 is fixedly connected to the outer surface of the first tie rod 21 in an arc structure attachment manner, the radian of one end of the guide block 311 close to the heat insulation board 212 is consistent with that of the heat insulation board 212 and the attachment 212 is movably connected up and down, the heat insulation plate 212 is made of copper metal and is distributed in a hollow manner, the fixed stop blocks 211 and the guide blocks 311 are made of high-toughness metal materials, strong magnets are embedded in the adjacent surfaces of the two fixed stop blocks 211, the fixed stop blocks 211 adsorb the guide blocks 311 through the magnetic force of the strong magnets, when the device is used, the first stretching component 2 and the second stretching component 3 which are identical in structure are distributed in the spring body 1 in an opposite manner, the fixed ring 23 and the clamping strip 24 of the semi-ring structure arranged at the bottom ends of the first tie rod 21 and the second tie rod 31 are clamped and fixed at the edge of the spring body 1, the first tie rod 21 and the second tie rod 31 are attached and are connected with the fixed stop blocks 211 in a vertical sliding manner through the guide blocks 311, and at the moment, a user fixes two ropes on the ropes 5 on the first stretching component 2 and the second stretching component 3 respectively, the pet runs the artificial buffering of dragging at first through supplementary tensile 4 in-process and then realizes buffering inertial impact dynamics once more through first tensile subassembly 2 and the 3 opposite direction tensile extrusion spring main part 1 of second tensile subassembly, the device structure cooperates spring main part 1 as one-level buffer member through first tensile subassembly 2 and second tensile subassembly 3, supplementary tensile 4 constitutes as the second grade buffering, both mutually support and pass through the guide block 311 and the fixed guide sliding displacement that hinders piece 211 is tensile, realize better buffering stretch-proofing effect.

As an embodiment of the present invention, the auxiliary stretching member 4 includes two sets of first metal sheets 41 and two second metal sheets 42, the second metal sheets 42 are symmetrically distributed with the center of the first stretching assembly 2 as the midpoint, the two first metal sheets 41 are distributed in an arc structure and have the same size and structure, the two sets of first metal sheets 41 are oppositely distributed in the arc structure, two ends of the first metal sheets 41 are connected to the second metal sheets 42 in a hinged manner, the first metal sheets 41 and the second metal sheets 42 are integrally produced by spring steel, when the auxiliary stretching member works, an impact force generated in a large dog-shaped jerk process is firstly transmitted to the auxiliary stretching member 4 through the rope fixing member 5, at this time, the second metal sheets 42 are elastically deformed and stretched, and then the first metal sheets 41 are pressed to compress the first metal sheets 41 to generate elastic deformation, then the inertia acting force is transmitted to the first stretching component 2 and the second stretching component 3 to compress the spring body 1, so that the excellent effects of tension resistance and buffering are realized.

As an embodiment of the present invention, the connection assembly 6 includes a T-shaped block 61, a sleeve 62, an insertion block 63, an insertion groove 64, an insertion cavity 65, a fixing seat 66, and an insertion strip 67, the bottom end of the second metal sheet 42 is provided with a mounting hole, the bottom end of the T-shaped block 61 is welded to the sleeve 62 through the mounting hole at the bottom end of the second metal sheet 42 without a seam, the inner center of the sleeve 62 is fixedly connected to the insertion block 63, two corresponding positions on two sides of the outer surface of the sleeve 62 are provided with the insertion grooves 64, the insertion grooves 64 and the outer wall of the sleeve 62 are obliquely provided at an angle of 15 to 30 degrees, the inner surface of the sleeve 62 and the outer surface of the insertion block 63 are provided with opposite threads, the fixing seat 66 is disposed below the sleeve 62, the insertion cavity 65 is provided in the inner portion of the fixing seat 66 and the corresponding position on the insertion block 63, the outer surface of the fixing seat 66 and the inner portion of the insertion cavity 65 are provided with threads, the outer surface of the fixed seat 66 is fixed with a butt joint strip 67 near the lower end, the butt joint strip 67 corresponds to the butt joint groove 64, the sleeve 62, the plug-in block 63 are in threaded connection with the fixed seat 66 and the plug-in cavity 65, when the bottom end of the sleeve 62 is in rotary threaded connection with the bottom end of the fixed seat 66, the butt joint strip 67 is buckled in the butt joint groove 64 for clamping and fixing, when the structure works, the first stretching component 2 and the second stretching component 3 are matched with the high-frequency stretching displacement of the auxiliary stretching component 4, the compression spring body 1 generates elastic deformation, so that the structure is inevitably damaged for a long time, and the local structure is damaged and cannot be used, therefore, the auxiliary stretching component 4 is connected with the first stretching component 2 and the second stretching component 3 through the connecting component 6, and when the sleeve 62, the plug-in block 63 are in threaded connection with the fixed seat 66 and the plug-in cavity 65, connect it fixedly, in order to prevent unexpected the damage that breaks away from, butt joint groove 64 and butt joint strip 67 have been designed to this department, when sleeve 62 threaded connection is on fixing base 66, butt joint strip 67 is kneaded to both hands, make butt joint strip 67 laminating fixing base 66 surface, then sleeve 62 has further rotatory displacement downwards, when butt joint strip 67 corresponds with butt joint groove 64 position, joint to the inside of butt joint groove 64 under the elasticity of butt joint strip 67 resets this moment, thereby sleeve 62 is difficult to break away from fixing base 66 under the unmanned effect, thereby reduce unexpected injury that breaks away from and bring, the connection mode dismantled of this structure also can be convenient for the user's equipment dismantlement change local part simultaneously, reduce cost drops into.

As an embodiment of the present invention, the bottom end of the fixed seat 66 is fixedly connected with the sliding block 222, the sliding block 222 is of a spherical structure, the upper end of the outer surface of the arc-shaped connecting strip 22 is provided with the movable groove 221, the section of the movable groove 221 is of a hemispherical structure and is matched with the spherical sliding block 222, the opening width of the upper end of the movable groove 221 is smaller than the diameter of the section of the spherical sliding block 222, the connecting assembly 6 realizes displacement on the first tie rod 21 and the second tie rod 31 through the sliding connection of the sliding block 222 and the movable groove 221, during operation, due to the nature of the movement of the pet, there is no regular running route during running, so that the first stretching assembly 2 and the second stretching assembly 3 of the stretching spring body 1 are not linearly and oppositely stretched, therefore, most of the stretching torque acts on the connecting assembly 6 and the first stretching assembly 2 and the second stretching assembly 3, the local connection part is over large in torque force and broken in bending, so that the connecting assembly 6, the first stretching assembly 2 and the second stretching assembly 3 are in matched sliding connection with the movable groove 221 through the spherical sliding block 222, and can be matched with stretching angles in different directions to perform sliding displacement and small-amplitude overturning in the stretching process, so that the stretching angles under different conditions can be met, the stretching acting force can be better acted on the spring main body 1, and stretching is further buffered.

As an embodiment of the present invention, the rope fixing member 5 includes a first arc-shaped connecting member 51, a second arc-shaped connecting member 52, an arc-shaped groove 53, an elastic strip 54, a tooth portion 55, and a movable block 56, the arc-shaped groove 53 is formed in the first arc-shaped connecting member 51, the movable block 56 is disposed in the arc-shaped groove 53, the second arc-shaped connecting member 52 is fixedly connected to the lower end of the movable block 56, a plurality of elastic strips 54 are disposed on the inner surface of the arc-shaped groove 53 at equal intervals, two ends of the elastic strip 54 are fixedly connected to the inner surface of the arc-shaped groove 53, the outer surface of the elastic strip 54 is pressed against and attached to the movable block 56, the tooth portion 55 is disposed on one side of the arc-shaped groove 53 and the movable block 56, the first arc-shaped connecting member 51 and the second arc-shaped connecting member 52 are engaged and fixed by the tooth portion 55, the top end of the second metal sheet 42 is fixedly connected to the first arc-shaped connecting member 51, the during operation, the rope tie is on first arc connecting piece 51 in rope mounting 5, then through the movable block 56 at the inside displacement of arc wall 53 this moment, rotate extension in arc wall 53 with second arc connecting piece 52, then the movable block 56 of free activity end is pegged graft to arc wall 53 in, fix the rope of tie on first arc connecting piece 51 through tooth portion 55 intercrossing interlock, this structure aim at mode, the rope is not dragging the dynamics effect down landing to auxiliary connection department, cause the friction to cut the rope, also can avoid the influence to other structures, the rope breaks away from simultaneously to a certain extent.

As an embodiment of the invention, a metal strip 11 is fixedly connected between adjacent spring strips in a spring body 1 consisting of spirally distributed spring strips, a rubber sleeve 12 is glued on the outer surface of the metal strip 11, the metal strip 11 is also matched with the spring body 1 in a spiral distribution, the metal strip 11 is spirally distributed in an arc structure and is made of elastic steel metal, the hair of the metal strip is vigorous for large dogs, when the device is applied to the body of a pet, the aim of buffering the inertia acting force is realized by mainly utilizing a first stretching component 2 and a second stretching component 3 to oppositely compress the spring body 1, therefore, the spring body 1 is frequently compressed, the hair of the pet is easily clamped between the adjacent spring strips, the hair is easily pulled and falls off to hurt the pet, and therefore, by designing the metal strip 11 and the rubber sleeve 12 which are matched with the spring body 1 in a spiral distribution, the metal strip 11 can increase the elastic deformation ability of the spring main body 1 on the one hand, and on the other hand shields the gap between the spring strips with the spiral structure, so that pet hair is prevented from being clamped in the compression process.

The working principle is as follows: when the device is used, the first stretching component 2 and the second stretching component 3 which are the same in structure are distributed in the spring main body 1 in an opposite mode, the first stretching component 2 and the second stretching component 3 are hooked and clamped and fixed on the edge of the spring main body 1 through the semi-ring-structured fixing ring 23 and the clamping strip 24 arranged at the bottom ends of the first drawknot rod 21 and the second drawknot rod 31, the first drawknot rod 21 and the second drawknot rod 31 are attached and are connected with the fixed block 211 in a vertical sliding mode through the guide block 311, at the moment, a user fixes two ropes on the rope fixing parts 5 on the first stretching component 2 and the second stretching component 3 respectively, during the process of dragging, a pet runner firstly primarily stretches and buffers through the auxiliary stretching part 4 and then stretches and extrudes the spring main body 1 correspondingly through the first stretching component 2 and the second stretching component 3 to buffer the inertial impact force again, and the device structure uses the first stretching component 2 and the second stretching component 3 to match the spring main body 1 as a primary buffer component, the auxiliary stretching piece 4 is formed as a secondary buffer, the two are mutually matched and stretched through the guiding sliding displacement of the guide block 311 and the fixed stop block 211, so that a better buffer anti-stretching effect is realized; in order to ensure the accurate stretching direction and the accurate stretching force exerted on the spring body 1 in the process of stretching and compressing the spring body 1 by the first stretching component 2 and the second stretching component 3 in cooperation with the auxiliary stretching part 4, the first tie rod 21 and the second tie rod 31 in the structure realize accurate up-and-down displacement stretching through the fixed block 211 of the splayed structure in cooperation with the guide block 311, and meanwhile, a small deviation occurs in the inevitable stretching direction of the spring, in order to avoid the guide block 311 from being separated from the fixed block 211, the structure not only limits the guide block 311 through the fixed block 211 of the splayed structure, but also can reduce the probability of separation of the guide block 311 to a certain extent through strong magnet magnetic adsorption of the adjacent surfaces, and the guide block 311 and the fixed block 211 are made of high-toughness metal materials, so that the structure has better extension deformation capability, and prevents the excessive torque from causing the stretching part, the guide block 311 and the excessive torque in the stretching process, The fixed blocking block 211 is broken, meanwhile, the heat insulation plate 212 with the hollow structure prevents the first tie rod 21 and the second tie rod 31 from being in direct contact in the frequent stretching and displacement process of the two tie rods, the guide block 311 directly displaces and rubs on the heat insulation plate 212 at the fixed blocking block 211, and then the hollow structure of the heat insulation plate 212 ensures good heat dissipation, so that damage caused by overhigh local friction temperature is avoided; when the device works, the first stretching component 2 and the second stretching component 3 are matched with the high-frequency stretching displacement of the auxiliary stretching component 4, the compression spring body 1 generates elastic deformation, so that certain damage can be generated when the structure is used for a long time, and the local structure is damaged and can not be used, therefore, the auxiliary stretching component 4 and the first stretching component 2 are connected with the second stretching component 3 through the connecting component 6, when the device is used, the sleeve 62, the inserting block 63 are in threaded connection with the fixed seat 66 and the inserting cavity 65 to be fixedly connected, in order to prevent the accidental separation and damage, the butt joint groove 64 and the butt joint strip 67 are designed, when the sleeve 62 is in threaded connection with the fixed seat 66, the butt joint strip 67 is kneaded by two hands, so that the butt joint strip 67 is attached to the outer surface of the fixed seat 66, then the sleeve 62 is further rotated to displace downwards, and when the butt joint strip 67 corresponds to the butt joint groove 64, at this moment, the elasticity of the butt joint strip 67 resets and the joint is connected to the inside of the butt joint groove 64, so that the sleeve 62 is difficult to separate from the fixing seat 66 under the action of non-human factors, the accidental injury caused by the accidental separation is reduced, meanwhile, the detachable connection mode of the structure can be assembled and disassembled by a user conveniently, and the local parts are replaced, so that the cost is reduced.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims (6)

1. A tensile spring, includes spring main part (1) that comprises heliciform distribution spring strip, its characterized in that: a first stretching assembly (2) and a second stretching assembly (3) are distributed in the spring main body (1) in an opposite mode, auxiliary stretching pieces (4) are arranged at the lower end of the first stretching assembly (2) and the upper end of the second stretching assembly (3), connecting assemblies (6) are arranged between the auxiliary stretching pieces (4) and the first stretching assembly (2) and between the auxiliary stretching pieces (4) and the second stretching assembly (3), the auxiliary stretching pieces (4) are fixedly connected with the first stretching assembly (2) and the second stretching assembly (3) through the connecting assemblies (6), and rope fixing pieces (5) are arranged at the upper ends and the lower ends of the two auxiliary stretching pieces (4);

the first stretching assembly (2) comprises first tie rods (21), arc-shaped connecting strips (22), fixing rings (23) and clamping strips (24), wherein the two ends of each arc-shaped connecting strip (22) are fixedly connected with the first tie rods (21), the two first tie rods (21) and the arc-shaped connecting strips (22) jointly form a U-shaped structure, the top ends of the two first tie rods (21) are fixedly connected with the fixing rings (23) and the clamping strips (24), the clamping strips (24) are located on one sides of the fixing rings (23), the fixing rings (23) are distributed in a semi-ring structure, the clamping strips (24) and the fixing rings (23) of the semi-ring structure are located on the same horizontal line, the clamping strips (24) are made of high-toughness metal materials, mounting gaps are reserved between the clamping strips (24) and the fixing rings (23), and the clamping strips (24) and the fixing rings (23) are clamped to the outer surfaces of top end spiral spring strips of the spring main body (1) through the mounting gaps, the mounting gap distance is larger than the diameter of the section of the spiral spring strip;

the first stretching component (2) and the second stretching component (3) are identical in structure, a second tie rod (31) is arranged in the second stretching component (3), wherein a first tie rod (21) in the first stretching component (2) is attached to and placed on a second tie rod (31) in the second stretching component (3), a fixed block (211) and a guide block (311) are respectively arranged on the adjacent surfaces of the first tie rod (21) and the second tie rod (31), the fixed block (211) is fixedly connected with the first tie rod (21), the guide block (311) is fixedly connected with the second tie rod (31), the fixed block (211) is distributed in a splayed structure, the guide block (311) extends to the position between the fixed blocks in the splayed structure and is attached and movably connected, a heat insulation board (212) is arranged between the fixed blocks in the splayed structure, the heat insulation board (212) is fixedly connected to the outer surface of the first tie rod (21) in an arc-shaped structure, the one end radian that guide block (311) is close to heat insulating board (212) is unanimous with heat insulating board (212) and laminating heat insulating board (212) swing joint from top to bottom, heat insulating board (212) constitute for copper metal, and its inside fretwork form that is distributes, fixed block (211) and guide block (311) constitute by high tenacity metal material, and two fixed adjacent surfaces of block (211) embedded strong magnets that are connected with, fixed block (211) adsorb guide block (311) through strong magnet magnetic force.

2. A tension spring as defined in claim 1, wherein: supplementary extension member (4) are including first sheetmetal (41), second sheetmetal (42), the quantity of second sheetmetal (42) is two sets of, and its center that uses first tensile subassembly (2) is midpoint symmetric distribution, two first sheetmetal (41) are the arc structure and distribute, and its big or small structure is the same, the quantity of first sheetmetal (41) is two sets of, and it is arc structure opposite direction and distributes, adopt articulated mode to be connected between the both ends of first sheetmetal (41) and second sheetmetal (42), first sheetmetal (41) all adopt spring steel integral type production and preparation with second sheetmetal (42).

3. A tension spring as defined in claim 2, wherein: the connecting assembly (6) comprises a T-shaped block (61), a sleeve (62), an inserting block (63), a butt joint groove (64), an inserting cavity (65), a fixed seat (66) and a butt joint strip (67), a mounting hole is formed in the bottom end of the second metal sheet (42), the bottom end of the T-shaped block (61) is in seamless welding with the sleeve (62) through the mounting hole in the bottom end of the second metal sheet (42), the inserting block (63) is fixedly connected to the inner center of the sleeve (62), the butt joint groove (64) is formed in the corresponding position of the two sides of the outer surface of the sleeve (62), the butt joint groove (64) and the outer wall of the sleeve (62) are obliquely formed at an angle of 15-30 degrees, opposite threads are formed in the inner surface of the sleeve (62) and the outer surface of the inserting block (63), the fixed seat (66) is arranged below the sleeve (62), the inserting cavity (65) is formed in the corresponding position of the inner portion of the fixed seat (66) and the inserting block (63), the inside of fixing base (66) surface and grafting chamber (65) all is provided with the screw thread, the surface of fixing base (66) is close to the rigidity of lower extreme and is had butt joint strip (67), and butt joint strip (67) and butt joint groove (64) position correspondence, sleeve (62), grafting piece (63) and fixing base (66) and grafting chamber (65) threaded connection, when sleeve (62) bottom rotation threaded connection was to fixing base (66) bottom position, butt joint strip (67) lock joint is fixed to butt joint groove (64) inside block.

4. A tension spring as defined in claim 3, wherein: bottom fixedly connected with slider (222) of fixing base (66), and slider (222) are spherical structure, activity groove (221) have been seted up to the surface upper end of arc connecting strip (22), and activity groove (221) cross-section becomes hemispherical structure and coincide each other with spherical slider (222), and activity groove (221) upper end opening width is less than spherical slider (222) cross-section diameter, coupling assembling (6) realize the displacement on first drawknot pole (21) and second drawknot pole (31) through slider (222) and activity groove (221) sliding connection.

5. A tension spring as defined in claim 4, wherein: the rope fixing piece (5) comprises a first arc-shaped connecting piece (51), a second arc-shaped connecting piece (52), an arc-shaped groove (53), elastic strips (54), tooth parts (55) and movable blocks (56), wherein the arc-shaped groove (53) is formed in the first arc-shaped connecting piece (51), the movable blocks (56) are arranged in the arc-shaped groove (53), the lower end of each movable block (56) is fixedly connected with the second arc-shaped connecting piece (52), a plurality of elastic strips (54) are arranged on the inner surface of the arc-shaped groove (53) at equal intervals, the two ends of each elastic strip (54) are fixedly connected with the inner surface of the arc-shaped groove (53), the outer surface of each elastic strip (54) is pressed against and attached to the corresponding movable block (56), the tooth parts (55) are arranged on one sides of the arc-shaped groove (53) and the corresponding movable blocks (56), and the first arc-shaped connecting piece (51) is meshed with the second arc-shaped connecting piece (52) and fixed, the top end of the second metal sheet (42) is fixedly connected with the first arc-shaped connecting piece (51).

6. A tension spring as defined in claim 1, wherein: fixedly connected with metal strip (11) between the adjacent spring strip in spring main part (1) of constituteing by the heliciform distribution spring strip, and metal strip (11) surface is glued and has rubber sleeve (12), metal strip (11) also are heliciform distribution and agree with spring main part (1), metal strip (11) are arc structure spiral and distribute, and it comprises the elastic steel metal.

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