Damper and explosion-proof traction device

Abstract

The present invention provides a damper and an explosion-proof traction device, which relates to the field of pet traction devices, and solves the problem that the damper has a short service life and the traction device easily loses its explosion-proof effect. The damper includes a magnetic component and a damping plate, which are magnetically adsorbed and rotate synchronously or stop when the rotation speed of the winding disk is less than the set speed; when the rotation speed of the winding disk exceeds the set speed, either the magnetic component or the damping plate is connected to the winding disk, and the other is connected to the stationary component, and when the magnetic component and the damping plate rotate relative to each other, the magnetic adsorption force between the two forms a resistance to limit the rotation of the winding disk. In the above-mentioned damper, the adsorption force between the magnetic component and the damping plate can form a resistance to limit the rotation of the winding disk; the magnetic component and the damping plate are attached and magnetically adsorbed, and there is no need to fill damping materials such as adhesive oil, thereby reducing the heat generated by the friction of the damping material, and it can also have a large magnetic force under wear, which greatly extends the service life.

Description

Technical Field

[0001] The invention relates to the technical field of pet traction devices, in particular to a damper and an explosion-proof traction device. Background Art

[0002] When residents take their pets out, they often need to use a pet leash to limit the pet's range of movement. However, when taking pets out for activities, pets often rush out. In order to prevent the leash from causing harm to the animal and the owner when the pet rushes out, and to give the owner a certain amount of reaction time, an anti-rush leash is essential.

[0003] In the prior art, when the winding drum with the traction rope wound around it rotates at a high speed, in order to prevent burst, most of the traction devices require a damper to generate a certain resistance to the movement of the winding drum to limit the movement of the winding drum.

[0004] The dampers used in explosion-proof tractors in the prior art mainly include the following two structures:

[0005] The first damper includes: a damping plate sleeved on a fixed rotating shaft and a rotating plate rotatable around the fixed rotating shaft. The damping plate is in close contact with the rotating plate, and the rotation of the rotating plate requires friction with the damping plate to bring about a damping effect.

[0006] The second type of damper includes: a stationary part and a rotatable part, the stationary part is fixedly connected to the shell, and the winding drum is connected to the rotatable part when the winding drum rotates at high speed. The inner cavity of the rotatable part and the stationary part are filled with friction fillers such as rough leather or viscous fillers such as viscous oil, so as to achieve damping contact and connection between the rotatable part and the stationary part, thereby bringing about a damping effect.

[0007] The applicant has found that the prior art has at least the following technical problems:

[0008] The first type of damper mentioned above, as the damping plate and the rotating plate wear, the close contact between the two is affected, and the service life of the damper is short.

[0009] In the second type of damper, the damping material is located between the stationary part and the rotatable part, which generates heat due to friction. The heat is severe and can easily lead to product failure. In addition, damping materials such as viscous oil are prone to leakage and reduction, resulting in severe attenuation of the damping value of the damper, which can easily lead to a short service life.

[0010] In summary, the damper in the prior art has a short service life, which becomes an urgent problem to be solved. After a period of use, the damper becomes ineffective and the pet leash loses its damping effect. Summary of the invention

[0011] The object of the present invention is to provide a damper and an explosion-proof traction device to solve the technical problem in the prior art that the damper in the existing pet traction device has a short service life and easily causes the traction device to lose its explosion-proof effect; the many technical effects that can be produced by the preferred technical solution among the many technical solutions provided by the present invention are detailed as follows.

[0012] To achieve the above object, the present invention provides the following technical solutions:

[0013] The damper provided by the present invention comprises a magnetic component and a damping sheet, wherein:

[0014] The two are magnetically attracted and rotate synchronously or stop when the speed of the winding disc is less than the set speed;

[0015] When the rotation speed of the winding drum exceeds the set speed, either the magnetic component or the damping plate is connected to the winding drum, and the other is connected to the stationary component. When the magnetic component and the damping plate rotate relative to each other, the magnetic adsorption force between the two forms a resistance to limit the rotation of the winding drum.

[0016] Preferably, the magnetic component is arranged on the winding drum, and the damping plate can be connected to the stationary component when the rotation speed of the winding drum exceeds a set speed; or, the magnetic component is arranged on the stationary component, and the damping plate can be connected to the winding drum when the rotation speed of the winding drum exceeds a set speed;

[0017] The magnetic assembly and the damping plate can rotate relatively when the force applied by the winding drum is greater than the resistance formed by the magnetic adsorption force.

[0018] Preferably, the magnetic component comprises a magnet cover and a magnet connected to each other, wherein the magnet cover is disposed outside the magnet and fixed to a stationary component or a damping plate, and the damping plate is magnetically adsorbed to the magnet.

[0019] Preferably, a limiting rib is provided on the damping plate, and a limiting groove is provided at a position of the magnetic component corresponding to the limiting rib, the limiting rib extends into the limiting groove and the matching structure of the two is used to limit the upward and downward displacement of the damping plate.

[0020] The present invention also provides an explosion-proof traction device, comprising the above-mentioned damper, a winding drum and a shell as a stationary component, wherein the winding drum and the shell are rotatably connected.

[0021] Preferably, the explosion-proof traction device further comprises a connecting component, and the connecting component is connected to the winding drum;

[0022] When the magnetic component is disposed on the winding drum, the connecting component can connect the damping plate to the housing when the rotation speed of the winding drum exceeds a set speed;

[0023] When the magnetic component is arranged on the shell, the connecting component can connect the damping plate to the winding drum when the rotation speed of the winding drum exceeds a set speed.

[0024] Preferably, the connecting assembly comprises a limiting member, an elastic member and a moving member, wherein:

[0025] The limiting member limits the movable member on the winding drum; one end of the elastic member is a fixed end, and the other end is connected to the movable member; when the centrifugal force applied to the movable member is greater than the elastic force applied to the movable member, the movable member slides or rotates to the side away from the limiting member to connect the damping plate to the housing or the winding drum.

[0026] Preferably, the connecting assembly comprises a sliding sleeve, a spring sheet and a sliding block, wherein:

[0027] The slider is located in the sliding sleeve, and a limiting gap is provided on the sliding sleeve for the spring sheet to extend into and prevent it from curling; one end of the spring sheet is a fixed end, and the other end passes through the limiting gap and is connected to the slider. The slider can slide away from the sliding sleeve and abut against the shell or the damping plate when the centrifugal force it is subjected to is greater than the elastic force it is subjected to.

[0028] Preferably, the connecting assembly comprises a retaining ring, a rotating block, and a torsion spring, wherein:

[0029] The torsion spring is sleeved outside the rotating shaft and one end of the torsion spring is a fixed end, and the other end extends into the rotating block and is connected to the first end of the rotating block. The retaining ring is connected to the rotating block to prevent the rotating block from falling out; the second end of the rotating block can rotate around the axis of the torsion spring as the axis when the centrifugal force it receives is greater than the elastic force it receives, and abut against the housing or the damping plate.

[0030] Preferably, the explosion-proof tractor further comprises a blocking assembly having a block, wherein the block is located at the periphery of the connecting assembly and extends toward the connecting assembly;

[0031] When the magnetic component is arranged on the winding drum, the block is located on the shell and can abut against the connecting component to connect the damping plate and the shell; when the magnetic component is arranged on the shell, the block is located on the outer periphery of the damping plate and can abut against the connecting component to connect the damping plate and the winding drum.

[0032] Compared with the prior art, the present invention has the following beneficial effects:

[0033] 1. The damper provided by the present invention has a magnetic component and a damping plate that are magnetically adsorbed, and either one of them is connected to the winding disk, and the other is connected to the stationary component. Since the winding disk rotates relative to the stationary component, in the above case, the magnetic adsorption force between the magnetic component and the damping plate when they rotate relative to each other can form a resistance to limit the rotation of the winding disk, thereby at least offsetting a part of the explosive force of the pet and reducing the explosive speed of the pet; compared with dampers of other structures, the magnetic component and the damping plate are attached and magnetically adsorbed, and the structure is simple. There is no need to fill damping materials such as adhesive oil between the two, which reduces the heat generated by the friction of the damping material, and there is no problem of reduced life due to the reduction of damping material; and even in the case of wear, it can still have a large magnetic force, and the service life will not be reduced due to the wear of the metal sheet; the service life is greatly extended.

[0034] 2. The explosion-proof traction device provided by the present invention also has the advantage of long service life because it is equipped with the above-mentioned damper. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, 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 paying creative work.

[0036] Figure 1 It is a schematic diagram of the structural decomposition of the first embodiment of the damper of the present invention;

[0037] Figure 2 It is a structural schematic diagram of the first embodiment of the explosion-proof impact tractor;

[0038] Figure 3 is an exploded structural diagram of the damper and the first type of connecting assembly installed on the winding drum;

[0039] Figure 4 It is a schematic diagram of the cross-sectional structure of the damper installed on the winding drum;

[0040] Figure 5 is a schematic diagram of the structure of the damper and the first connection component;

[0041] Figure 6 It is a schematic diagram of the structure where the resistance component is located on the housing;

[0042] Figure 7 It is a structural schematic diagram of a second embodiment of an explosion-proof impact tractor;

[0043] Figure 8 is an exploded structural diagram of the damper and the second connection assembly installed on the winding drum;

[0044] Fig. 9 is a schematic diagram of the structure of the damper and the second connection component;

[0045] Fig.10 It is a structural schematic diagram of a third embodiment of an explosion-proof impact tractor;

[0046] Fig.11 It is a schematic diagram of the structure in which the damper is installed on the housing;

[0047] Fig.12 yes Fig.11 The cross-sectional structure diagram at AA in the middle;

[0048] Fig.13 is a schematic structural diagram of a second embodiment of the damper of the present invention;

[0049] In the figure, 1, damper; 11, damping plate; 111, limiting rib; 12, magnetic component; 121, magnet; 122, magnet cover; 1221, limiting groove; 2, winding reel; 3, shell; 4, button assembly; 5, connecting assembly; 51, slider; 52, spring; 53, sleeve; 54, rotating block; 55, torsion spring; 56, retaining ring; 57, fixed block; 6, resisting assembly; 61, retaining rib; 62, retaining block. DETAILED DESCRIPTION

[0050] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0051] In the description of the present invention, it should be understood that the terms "center", "length", "width", "height", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "side" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0052] The embodiment of the present invention provides a damper and an explosion-proof tractor which can greatly increase the service life and reduce the heat generation of the damper.

[0053] Combine the following Figure 1-Figure 12The technical solution provided by the present invention is described in more detail.

[0054] like Figure 1-Figure 12 As shown, this embodiment provides a damper 1, including a magnetic component 12 and a damping plate 11, wherein: the magnetic component 12 and the damping plate 11 are magnetically adsorbed and rotate synchronously or stop when the rotation speed of the winding drum 2 is less than the set speed; when the rotation speed of the winding drum 2 exceeds the set speed, either the magnetic component 12 or the damping plate 11 is connected to the winding drum 2, and the other is connected to the stationary part, and when the magnetic component 12 and the damping plate 11 rotate relative to each other, the magnetic adsorption force between the two forms a resistance for limiting the rotation of the winding drum 2.

[0055] The damping sheet 11 may be made of metal material or a magnet that can be attracted to the magnetic component 12 , so as to achieve magnetic attraction to the magnetic component 12 .

[0056] The damper 1 in this embodiment, the magnetic component 12 and the damping plate 11 are magnetically adsorbed, and either one of them is connected to the winding drum 2, and the other is connected to the stationary part. Since the winding drum 2 rotates relative to the stationary part, in the above case, the magnetic adsorption force between the magnetic component 12 and the damping plate 11 can form a resistance to limit the rotation of the winding drum 2 when the two rotate relative to each other, thereby at least offsetting a part of the explosive force of the pet and reducing the explosive speed of the pet.

[0057] Compared with dampers 1 of other structures, the magnetic component 12 and the damping plate 11 are bonded and magnetically adsorbed, with a simple structure. There is no need to fill damping materials such as adhesive oil between the two, which reduces the heat generated by the friction of the damping material and does not cause the problem of reduced service life due to the reduction of damping material. Even in the case of wear, it can still have a large magnetic force, and the wear has little effect on the magnetic adsorption force, and the service life will not be reduced due to the wear of the metal sheet; the service life is greatly extended.

[0058] As an alternative embodiment, see Figure 2-Figure 9 As shown, the magnetic assembly 12 is arranged on the winding drum 2, and the damping plate 11 can be connected to the stationary component when the rotation speed of the winding drum 2 exceeds the set speed. Figure 10-12 As shown, the magnetic component 12 is arranged on a stationary component, such as the housing 3, and the damping plate 11 can be connected to the winding drum 2 when the rotation speed of the winding drum 2 exceeds a set speed.

[0059] Alternatively, the damping plate 11 is disposed on the winding drum, and the magnetic component 12 can be connected to the stationary component when the rotation speed of the winding drum 2 exceeds the set speed; or the damping plate 11 is disposed on the stationary component, such as the housing 3, and the magnetic component 12 can be connected to the winding drum 2 when the rotation speed of the winding drum 2 exceeds the set speed.

[0060] The magnetic assembly 12 and the damping plate 11 can rotate relative to each other when the force exerted by the winding drum 2 is greater than the resistance formed by the magnetic adsorption force between the two, and can be stationary or rotate synchronously when the force exerted by the winding drum 2 is less than the resistance formed by the magnetic adsorption force between the two.

[0061] In this embodiment, the damping force between the magnetic component 12 and the damping plate 11 is the resistance formed by the magnetic adsorption force between the two during relative rotation, rather than the friction resistance between the metal sheets or the friction force generated by the damping material. It will not fail due to wear of the metal sheets or reduction of the damping material, has a long service life, and reduces the heat generated by friction.

[0062] When the rotation speed of the winding drum 2 exceeds the set speed, one of the damping plate 11 and the magnetic component 12 is connected to the winding drum 2, and the other is connected to the stationary component. When the two rotate relative to each other, the resistance formed by the magnetic adsorption force limits the relative rotation between the two, that is, a resistance is formed to limit the rotation of the winding drum 2, thereby limiting the explosive speed of the pet, giving the owner a certain amount of reaction time, and reducing the harm to the pet and the owner.

[0063] As an alternative embodiment, see Figure 1 , Figure 3 , Figure 4 , Figure 8 and Fig.12 As shown, the magnetic component 12 includes a magnet 121 and a magnet cover 122 connected to each other, wherein the magnet cover 122 is disposed outside the magnet 121 and fixed to the stationary component or the damping plate 11. The magnet cover 122 can be made of a magnetic metal material, and the damping plate 11 is magnetically adsorbed to the magnet 121.

[0064] The damping plate 11 is made of metal material; the magnet 121 is a strong magnet, such as neodymium iron boron, which has strong adsorption force and can firmly fix the damping plate 11. The magnet cover 122 is made of magnetic conductive metal material to supplement the magnetic force of the magnet 121; the magnet cover 122 has the functions of fixing the magnet 121 and enhancing the magnetic force of the magnet 121. The magnet 121 with the magnet cover 122 has greatly improved magnetic force, so it can firmly adsorb the damping plate 11 without the need for other fixing structures.

[0065] The damping sheet 11 and the magnet 121 are completely fixed by magnetic force, which will not affect the relative rotation of the two when the winding drum 2 rotates at high speed, and the structure is simple. In order to prevent the damping sheet 11 from shifting in the vertical direction relative to the magnetic component 12, as an optional embodiment, see Figure 4 and Fig.12 As shown, Figure 4 The middle magnetic component 12 is disposed on the winding reel 2. Fig.12The middle magnetic component 12 is arranged on the shell 3; a limiting rib 111 is arranged on the damping plate 11, and a limiting groove 1221 is arranged at a position corresponding to the magnetic component 12 and the limiting rib 111, the limiting rib 111 extends into the limiting groove 1221 and the matching structure of the two is used to limit the upward and downward displacement of the damping plate 11.

[0066] For details, see Figure 4 and Fig.12 As shown, the limiting groove 1221 is arranged in the middle of the magnet cover 122; preferably, the limiting groove 1221 and the limiting rib 111 are coaxially arranged, and the matching structure of the limiting groove 1221 and the limiting rib 111 can prevent the damping plate 11 from shifting up and down when the damping plate 11 and the magnetic component 12 rotate relative to each other, so as to prevent the damping plate 11 from being separated from the magnetic component 12, thereby ensuring the stability of the structure.

[0067] The embodiment of the present invention provides an explosion-proof tractor, comprising the above-mentioned damper 1, a winding drum 2 and a housing 3 as a stationary component, wherein the winding drum 2 and the housing 3 are rotatably connected. The housing 3 is also provided with a button assembly 4, such as Figure 2 As shown, the button assembly 4 can adopt the structure in the prior art, which is not specifically limited here. When the button assembly 4 is not pressed, the traction rope wound on the winding drum 2 can be released when the pet pulls it; and the pet moves to pull the traction rope, and the winding drum 2 rotates; when the button assembly 4 is pressed, the button assembly 4 restricts the rotation of the winding drum 2, and it is difficult for the pet to continue to pull out the traction rope.

[0068] The explosion-proof tractor of this embodiment also has the advantage of long service life because it is provided with the damper 1.

[0069] Three specific implementations of the explosion-proof tractor are provided below:

[0070] Example 1

[0071] See also Figure 2-Figure 6 As shown, the explosion-proof traction device in this embodiment includes Figure 1 The damper 1 in the embodiment of the present invention is arranged on the winding drum 2, and specifically the magnetic component 12 is fixed on the winding drum 2. When the speed of the winding drum 2 is less than the set speed, the magnetic component 12 and the damping plate 11 rotate synchronously with the winding drum 2. When the speed of the winding drum 2 exceeds the set speed, the damping plate 11 is connected to the stationary part on the shell 3. When the magnetic component 12 and the damping plate 11 rotate relative to each other, the magnetic adsorption force between the two forms a resistance to limit the relative movement of the two.

[0072] In order to realize that when the speed of the winding drum 2 exceeds the set speed, the damping plate 11 is connected to the stationary part on the housing 3; as an optional embodiment, the explosion-proof tractor further includes a connecting component 5. In this embodiment, the connecting component 5 is connected to the winding drum 2, see Figure 2-Figure 5In this embodiment, the connecting component 5 is arranged on the damping plate 11; the magnetic component 12 is arranged on the winding drum 2, and the connecting component 5 can connect the damping plate 11 with the housing 3 when the rotation speed of the winding drum 2 exceeds the set speed;

[0073] Alternatively, the damping sheet 11 is fixed on the winding drum 2, and the connecting component 5 is disposed on the magnetic component 12, and the connecting component 5 can connect the magnetic component 12 to the housing 3 when the rotation speed of the winding drum 2 exceeds a set speed.

[0074] The above-mentioned connecting component 5 can connect the damping plate 11 to the shell 3 when the winding drum 2 exceeds the set rotation speed. When the force exerted on the magnetic component 12 by the winding drum 2 is greater than the resistance formed by the magnetic adsorption force between the magnetic component 12 and the damping plate 11, the magnetic component 12 and the damping plate 11 can rotate relative to each other.

[0075] As an optional embodiment, the above-mentioned connecting component 5 includes a limit member, an elastic member and a movable member, wherein: the limit member limits the movable member on the winding drum 2; one end of the elastic member is a fixed end, and the other end is connected to the movable member; the above-mentioned movable member is connected to the winding drum 2, and when the speed of the winding drum 2 is fast, the centrifugal force exerted on the movable member is large. When the speed of the winding drum 2 increases to the set speed, the centrifugal force exerted on the movable member is greater than the elastic force exerted on it, and the movable member overcomes the elastic force and moves to a position away from the limit member, thereby realizing the connection between the damping plate 11 and the shell 3.

[0076] For details, see Figure 2-Figure 6 As shown, the above-mentioned connecting component 5 includes a sliding sleeve 53 as the above-mentioned limiting member, a spring piece 52 as the above-mentioned elastic member and a slider 51 as the above-mentioned moving member, wherein: the slider 51 is located in the sliding sleeve 53, and a limiting gap is provided on the sliding sleeve 53 for the spring piece 52 to extend into and prevent the spring piece 52 from curling; one end of the spring piece 52 is a fixed end, and the other end passes through the limiting gap and is connected to the slider 51. The slider 51 can slide away from the sliding sleeve 53 and abut against the shell 3 or the damping plate 11 when the centrifugal force it is subjected to is greater than the elastic force it is subjected to.

[0077] The sliding sleeve 53 can fix the slider 51 on the damping plate 11 and is located inside the outer periphery of the damping plate 11. The spring sheet 52 provides elastic force for the slider 51 to return to its original position. When the speed of the winding drum 2 reaches the set speed, the centrifugal force on the slider 51 increases until it is greater than the elastic force on the spring sheet 52. The slider 51 slides away from the sliding sleeve 53 and slides to a position protruding from the outer periphery of the damping plate 11, such as Figure 5, and connected to the stationary part on the housing 3. The slider 51 is connected to the stationary part to limit the rotation of the damping plate 11. The resistance formed by the magnetic adsorption force between the damping plate 11 and the magnetic component 12 limits the rotation of the winding reel 2 and limits the movement speed of the pet. When the movement speed of the pet is limited and reduced, when the elastic force of the spring sheet 52 on the slider 51 is greater than the centrifugal force it is subjected to, the elastic force of the spring sheet 52 pulls the slider 51 to reset.

[0078] In order to connect the slider 51 to the stationary part on the housing 3, see Figure 6 As shown, the explosion-proof traction device also includes a blocking component 6 having a block 62, which is located at the periphery of the connecting component 5 and extends toward the connecting component 5; when the magnetic component 12 is arranged on the winding reel 2, the block 62 is located on the shell 3 and can abut against the connecting component 5 to connect the damping plate 11 and the shell 3.

[0079] See also Figure 6 As shown, the stopper 62 is arranged on the housing 3 and is located at the periphery of the damping plate 11. When the slider 51 slides out, the stopper 62 Figure 5 The state can be abutted against the slider 51, and the stopper 62 limits the rotation of the slider 51, thereby limiting the rotation of the damping plate 11. The resistance formed by the magnetic adsorption force between the damping plate 11 and the magnetic component 12 limits the rotation of the winding reel 2, generating resistance to the winding reel 2, and reducing the explosive speed of the pet. Among them, when the force exerted by the pet on the winding reel 2 through the traction rope is less than or equal to the resistance formed by the magnetic adsorption force between the winding reel 2 and the damping plate 11, the resistance can offset the force exerted by the pet on the winding reel 2; when the force exerted by the pet on the winding reel 2 through the traction rope is greater than the resistance between the winding reel 2 and the damping plate 11, the resistance can offset part of the force exerted by the pet on the winding reel 2.

[0080] Under the action of centrifugal force, the slider 51 slides out of the sliding sleeve 53 to a position protruding from the outer periphery of the damping plate 11, and the movement is smoother without causing a jamming problem.

[0081] Specifically, the blocking assembly 6 in this embodiment includes a blocking rib 61 and a blocking block 62, see Figure 6 As shown, the retaining rib 61 is annular, and the stopper 62 is arranged inside the retaining rib 61. The stopper 62 is arranged at a distance from the winding drum 2, that is, the stopper 62 does not contact the winding drum 2 to prevent the winding drum 2 from rotating. The retaining rib 61 extends toward the winding drum 2. The number of the above-mentioned stopper 62 is one or more, and is not specifically limited. Figure 2-Figure 6 As shown, when the magnetic component 12 in this embodiment is arranged on the winding drum 2, the retaining rib 61 and the stopper 62 are located on the shell 3, and the structure in which the stopper 62 abuts against the connecting component 5 connects the damping plate 11 and the shell 3.

[0082] The resisting assembly 6 formed by the above-mentioned retaining rib 61 and the block 62 is connected to the slider 51 as a stationary component, so that the damper 1 generates resistance to limit the rotation of the winding drum 2, thereby limiting the rotation of the winding drum 2, reducing the explosive speed of the pet, giving the owner a certain reaction time, and reducing the harm to the pet and the owner.

[0083] Example 2

[0084] See also Figure 7-Figure 9 As shown, another specific implementation of the connecting component 5 is provided in this embodiment. The connecting component 5 in this embodiment includes a retaining ring 56, a rotating block 54 as a moving part, and a torsion spring 55 as an elastic part, wherein: the torsion spring 55 is sleeved outside the rotating shaft and one end of it is a fixed end, and the other end extends into the rotating block 54 and is connected to the first end of the rotating block 54, and the retaining ring 56 is connected to the rotating block 54 to prevent the rotating block 54 from falling out; the second end of the rotating block 54 can rotate around the axis of the torsion spring 55 as the axis when the centrifugal force it receives is greater than the elastic force it receives, and abut against the shell 3 (or as in Example 3, the rotating block 54 and the damping plate 11 or the magnetic component 12).

[0085] Preferably, see Figure 7 The damping plate 11 is also provided with a fixed block 57 for resisting the rotating block 54. The fixed block 57 serves as a limiter to prevent the rotating block 54 from being away from the outer periphery of the damping plate 11 and being difficult to connect with the housing 3 under the action of centrifugal force.

[0086] The torsion spring 55 provides elastic force for restoring the position of the rotating block 54. When the centrifugal force on the rotating block 54 is less than or equal to the elastic force on it, the rotating block 54 is located on the damping plate 11; when the centrifugal force on the rotating block 54 is greater than the elastic force on it, the second end of the rotating block 54 rotates around the axis of the torsion spring 55 to a position protruding from the outer periphery of the damping plate 11 and connected to the stopper assembly 6 on the housing 3.

[0087] The above-mentioned resisting component 6 can adopt the same structure as in the above-mentioned embodiment.

[0088] Example 3

[0089] The difference between this embodiment and embodiment 1 and embodiment 2 is that, see Figure 7-Figure 9 As shown, the damper 1 of this embodiment is arranged on the housing 3 (as shown in FIG. Fig.11 and Fig.12 ), the connecting assembly 5 is arranged on the winding drum 2 (such as Fig.10 ); the damping plate 11 and the magnetic component 12 are synchronously stationary when the rotation speed of the winding drum 2 is lower than or equal to the set speed; the damping plate 11 can be connected to the winding drum 2 through the connecting component 5 when the rotation speed of the winding drum 2 exceeds the set speed. The connecting component 5 can adopt the structure of the above-mentioned embodiment 1 or embodiment 2, which will not be repeated here.

[0090] See also Fig.12 As shown, the magnet cover 122 can be fixed to the housing 3 by means of locking members such as screws, and the above-mentioned limiting ribs 111 and limiting grooves 1221 are also provided at the matching position between the magnet cover 122 and the damping plate 11 .

[0091] Alternatively, the damping plate 11 is fixed to the housing 3 by means of a screw fastener, and the magnetic assembly formed by the magnet 121 and the magnet cover 122 can be connected to the winding drum 2 through the connecting assembly 5 when the rotation speed of the winding drum 2 exceeds a set speed.

[0092] In order to realize the connection between the connecting component 5 on the winding drum 2 and the damping plate 11, the resisting component 6 in this embodiment is arranged on the outer periphery of the damping plate 11, see Fig.11 and Fig.13 As shown, specifically, the retaining rib 61 is located at the outer periphery of the damping plate 11 , and the stopper 62 is arranged at the inner circle of the retaining rib 61 . The structure in which the stopper 62 abuts against the connecting assembly 5 connects the damping plate 11 and the winding drum 2 .

[0093] During specific operation, the connecting component 5 moves synchronously with the winding reel 2, and the magnetic component 12 and the damping plate 11 in the damper 1 are located on the shell 3 and are stationary synchronously; when the pet pulls the traction rope to increase the speed of the winding reel 2 to the set speed, the centrifugal force exerted on the slider 51 (or the rotating block 54) is greater than the elastic force exerted on it, and the slider 51 (or the rotating block 54) slides (or rotates) to a position abutting against the stop block 62 on the damping plate 11, and the winding reel 2 is connected to the damping plate 11. The resistance formed by the magnetic adsorption force between the damping plate 11 and the magnetic component 12 on the shell 3 limits the rotation of the winding reel 2, thereby reducing the pet's explosive speed and giving the owner a certain amount of reaction time.

[0094] The above three embodiments are only used as examples, and the explosion-proof tractor is equipped with the above damper 1, which increases the service life of the tractor, reduces the heat generated by the damper 1, and has simple installation and compact structure.

[0095] In the description of this specification, specific features, structures or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0096] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art who is familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A damper, characterized in that: It includes a magnetic assembly and a damping sheet, wherein: The two are magnetically attracted and rotate synchronously or stop when the speed of the winding disc is less than the set speed; When the rotation speed of the winding drum exceeds the set speed, either the magnetic component or the damping plate is connected to the winding drum, and the other is connected to the stationary component. When the magnetic component and the damping plate rotate relative to each other, the magnetic adsorption force between the two forms a resistance to limit the rotation of the winding drum.

2. The damper according to claim 1, characterized in that The magnetic component is arranged on the winding drum, and the damping plate can be connected to the stationary component when the rotation speed of the winding drum exceeds the set speed; or, the magnetic component is arranged on the stationary component, and the damping plate can be connected to the winding drum when the rotation speed of the winding drum exceeds the set speed; The magnetic component and the damping plate can rotate relative to each other when the force exerted by the winding disk is greater than the resistance formed by the magnetic adsorption force.

3. The damper according to claim 1, characterized in that: The magnetic assembly includes a magnet cover and a magnet connected to each other, wherein the magnet cover is disposed outside the magnet and fixed to a stationary component or a winding disk, and the damping plate is magnetically adsorbed to the magnet.

4. The damper according to any one of claims 1 to 3, characterized in that: The damping plate is provided with a limiting rib, and a limiting groove is provided at a position of the magnetic component corresponding to the limiting rib. The limiting rib extends into the limiting groove and the matching structure of the two is used to limit the upward and downward displacement of the damping plate.

5. An explosion-proof traction device, characterized in that: The invention comprises the damper according to any one of claims 1 to 4, a winding drum and a shell as a stationary component, wherein the winding drum and the shell are rotatably connected.

6. The explosion-proof traction device according to claim 5, characterized in that: The explosion-proof traction device also includes a connecting component, and the connecting component is connected to the winding drum; When the magnetic component is disposed on the winding drum, the connecting component can connect the damping plate to the housing when the rotation speed of the winding drum exceeds a set speed; When the magnetic component is arranged on the shell, the connecting component can connect the damping plate to the winding drum when the rotation speed of the winding drum exceeds a set speed.

7. The explosion-proof traction device according to claim 6, characterized in that: The connecting assembly includes a limiting member, an elastic member and a moving member, wherein: The limiting member limits the movable member on the winding drum; one end of the elastic member is a fixed end, and the other end is connected to the movable member; when the centrifugal force applied to the movable member is greater than the elastic force applied to the movable member, the movable member slides or rotates to the side away from the limiting member to connect the damping plate to the housing or the winding drum.

8. The explosion-proof traction device according to claim 6 or 7, characterized in that: The connecting assembly includes a sliding sleeve, a spring sheet and a sliding block, wherein: The slider is located in the sliding sleeve, and a limiting gap is provided on the sliding sleeve for the spring sheet to extend into and prevent it from curling; one end of the spring sheet is a fixed end, and the other end passes through the limiting gap and is connected to the slider. The slider can slide away from the sliding sleeve and abut against the shell or the damping plate when the centrifugal force it is subjected to is greater than the elastic force it is subjected to.

9. The explosion-proof traction device according to claim 6 or 7, characterized in that: The connecting assembly includes a retaining ring, a rotating block, and a torsion spring, wherein: The torsion spring is sleeved outside the rotating shaft and one end of the torsion spring is a fixed end, and the other end extends into the rotating block and is connected to the first end of the rotating block. The retaining ring is connected to the rotating block to prevent the rotating block from falling out; the second end of the rotating block can rotate around the axis of the torsion spring as the axis when the centrifugal force it receives is greater than the elastic force it receives, and abut against the housing or the damping plate.

10. The explosion-proof traction device according to claim 6 or 7, characterized in that: The explosion-proof tractor also includes a blocking assembly having a block, wherein the block is located at the periphery of the connecting assembly and extends toward the connecting assembly; When the magnetic component is arranged on the winding drum, the block is located on the shell and can abut against the connecting component to connect the damping plate and the shell; when the magnetic component is arranged on the shell, the block is located on the outer periphery of the damping plate and can abut against the connecting component to connect the damping plate and the winding drum.

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