Winch brake front cam

Abstract

The invention provides a winch brake front cam, and belongs to the technical field of winches. The abutting sleeve head is arranged at the end, deviating from the first spiral face, of the conical disc body, the multiple sliding grooves with the connecting pieces are formed in the conical head of the conical disc body, meanwhile, the mounting cavity is formed in the end, deviating from the abutting sleeve head, of each sliding groove, the deformation clamping head is hinged into the mounting cavity, and one end of the deformation clamping head abuts against the connecting pieces. Moreover, at least one clamping groove is formed in the brake hub, so that when the load is heavy and auxiliary brake is needed and the conical disc body moves towards the brake hub under the action of the first spiral surface, the abutting sleeve head moves relative to the conical disc body, the abutting sleeve head pushes the deformation clamping head through the connecting piece, and the deformation clamping head protrudes out of the conical surface of the conical head; the deformation clamping head is clamped into the clamping groove to achieve clamping and limiting of the conical disc body and the brake hub, auxiliary braking is achieved, and compared with an existing mode only depending on contact friction, braking is more reliable, and safety is higher.

Description

Technical Field

[0001] The present invention relates to the technical field of winches, and more particularly to a front cam of a winch brake. Background Art

[0002] As a device for winding ropes, a winch has a cable drum, a power assembly, and a braking assembly. The power assembly drives the cable drum to rotate, thereby realizing the winding of the telescopic cable. And the braking assembly is used to brake the cable drum to improve the safety of use. As a key structure in the braking assembly, the front cam of the brake directly determines the performance of the braking assembly. Therefore, the improvement of the front cam of the brake has always been a concern.

[0003] Currently, the braking structure of existing winches on the market is usually a winch brake device disclosed in Patent CN102730591A, which includes a brake shaft and an outer brake cone disk, an inner brake cone disk, a brake hub, a spiral clutch mechanism, and a brake coupling sleeve provided on the brake shaft. The brake drum is key-engaged with the drum of the winch. The brake shaft drives the spiral clutch mechanism to disengage. The disengagement process of the spiral clutch mechanism causes the outer brake cone disk and the inner brake cone disk to clamp the brake hub respectively. When in use, the outer brake cone disk and the inner brake cone disk clamp the brake hub respectively to achieve braking. Although the above structure has met the use requirements of braking through conical surface contact, however, since only the outer surface of the inclined plane contacts between the inner brake cone disk and the outer brake cone disk and the brake hub, there is only surface contact friction between the two contact surfaces, which can meet the use requirements under normal no-load conditions. But for heavy-load situations, if the drive motor fails during use and the load pulls the drum to rotate in the reverse direction, there is still a risk of slipping and potential safety hazards. Summary of the Invention

[0004] Aiming at the above problems existing in the prior art, the present invention aims to provide a front cam of a winch brake, which is provided as a split structure, including a cone disk main body, a pressing sleeve head, a deformation clamping head, a connecting member, and a reset member. The pressing sleeve head is arranged at the small head end of the cone disk main body, and an embedding groove is provided on the cone disk main body. The deformation clamping head is arranged in the embedding groove, and the deformation clamping head is connected to the pressing sleeve head through the connecting member. At the same time, a reset member is also arranged on the deformation clamping head, so that when the front cam of the brake moves towards the brake hub under the action of the spiral surface of the rear cam of the brake, the pressing sleeve head can be synchronously compressed and moved, and the pressing sleeve head causes the deformation clamping head to deform through the connecting member and protrude from the embedding groove of the cone disk main body to be clamped into the clamping groove on the brake hub, realizing auxiliary braking and improving the braking reliability. After the acting force of the rear cam of the brake on the front cam of the brake decreases, the deformation clamping head automatically retracts into the embedding groove under the action of the reset member, releasing the auxiliary braking and being consistent with the original use mode.

[0005] The specific technical solutions are as follows: A winch brake front cam, including a cone disc body, the conical surface of the cone disc body cooperates with the brake hub, has such characteristics, and also includes: a pressing sleeve, a deformation clamp, a connecting piece and a reset piece, one end of the cone disc body is a conical head, the other end of the cone disc body is provided with a sleeve, the end surface of the sleeve away from the conical head is provided with a first spiral surface, the conical surface of the cone head is in contact with or separated from the brake hub, the pressing sleeve is arranged in a cylindrical shape, the pressing sleeve is arranged at the end of the cone head away from the sleeve, and the pressing sleeve A plurality of connecting pieces arranged along the axial direction of the sleeve are provided on the side of the head close to the conical head, and a plurality of sliding grooves corresponding to the connecting pieces are opened on the outer side wall of the end of the conical head away from the sleeve. At the same time, an installation cavity is provided on the end of each sliding groove away from the pressing sleeve head. The deformation clamp is a rod body structure, and the middle part of the deformation clamp is hinged in the installation cavity. One end of the deformation clamp is in contact with the connecting piece, and a reset piece is provided between the deformation clamp and the installation cavity. At the same time, at least one clamping groove is opened on the inner wall of the brake hub.

[0006] In the above-mentioned winch brake front cam, the connecting piece is a telescopic rod, which includes an outer tube, an inner tube and a spring. The outer tube and the inner tube are coaxially sleeved, and a spring is arranged between the inner tube and the outer tube.

[0007] The above-mentioned winch brake front cam, wherein the reset member is a reset torsion spring, one end of the reset torsion spring is fixed on the cavity wall of the mounting cavity of the conical head, the other end of the reset torsion spring is fixed on the deformation clamp, and the torque loaded on the deformation clamp by the connecting member is greater than the torque loaded on the deformation head by the reset torsion spring.

[0008] The above-mentioned winch brake front cam, wherein a semicircular groove is provided below the cavity opening of each mounting cavity, the opening of the semicircular groove is arranged toward the outer side of the conical surface of the conical head, and a protruding rotating arm is provided on the side wall of the middle part of each deformation clamp, and when the deformation clamp is installed in the corresponding mounting cavity, the rotating arm is embedded in the corresponding semicircular groove.

[0009] The above-mentioned winch brake front cam, wherein the cone disc body is sleeved on the brake shaft, and a brake rear cam is also sleeved on the end of the brake shaft and located on the end of the sleeve where the first spiral surface is provided. The brake rear cam is spline-connected to the brake shaft, and a second spiral surface matching the first spiral surface is provided on the end face of the brake rear cam close to the sleeve.

[0010] In the above-mentioned winch brake front cam, a limit stop ring is arranged on the brake shaft and located on the side of the cone disc body away from the brake rear cam. The limit stop ring is fixed on the brake shaft and contacts with the pressing sleeve.

[0011] In the above-mentioned winch brake front cam, a gap is provided between the limit stop ring and the pressing sleeve.

[0012] The above-mentioned front cam of a winch brake, wherein the pressing socket head includes a collar and a contact arm. The collar is sleeved on the brake shaft, and several contact arms extending radially are arranged at one end of the collar close to the conical head. At the same time, several avoidance holes are radially opened at one end of the conical head facing away from the shaft sleeve, and one avoidance hole corresponds to one chute. The contact arm is arranged in the avoidance hole and one end abuts against the connecting piece.

[0013] The above-mentioned front cam of a winch brake, wherein several convex blocks extending towards the inside of the chute are arranged at the notch of the chute, and when the connecting piece is located in the chute, the convex blocks press the connecting piece.

[0014] The above-mentioned front cam of a winch brake, wherein an installation enlarged hole is further opened at one end of the conical head facing away from the shaft sleeve. The aperture of the installation enlarged hole is larger than the outer diameter of the collar. One end of a pre-tightening torsion spring extends into the installation enlarged hole, and the pre-tightening torsion spring is sleeved outside the collar and there is a gap between the pre-tightening torsion spring and the collar. At the same time, a fixing hole is opened in the installation enlarged hole, and one end of the pre-tightening torsion spring is inserted into the fixing hole.

[0015] The positive effects of the above technical solutions are: For the above-mentioned front cam of a winch brake, by arranging a pressing socket head at one end of the conical disc body facing away from the first spiral surface, several chutes are opened on the conical head of the conical disc body, a connecting piece is arranged in the chute, at the same time, a deformation clamping head is arranged at one end of the chute facing away from the pressing socket head and abuts against the connecting piece, and at least one clamping groove is opened on the brake hub, so that when heavy load requires auxiliary braking, when the conical disc body moves towards the brake hub under the action of the first spiral surface, the pressing socket head pushes the deformation clamping head through the connecting piece, so that the deformation clamping head protrudes out of the conical surface of the conical head, and the conical disc body and the brake hub are clamped and limited by the deformation clamping head being clamped into the clamping groove, realizing auxiliary braking. Compared with the existing method relying only on contact friction, the braking reliability is higher and the safety is better. Description of the Drawings

[0016] Figure 1 It is a structural diagram of an embodiment of the front cam of a winch brake of the present invention; Figure 2 It is a cross-sectional view of an embodiment of the front cam of a winch brake of the present invention; Figure 3 It is Figure 2 The enlarged view of part A in

[0017] In the accompanying drawings: 1. Cone disc body; 11. Conical head; 12. Sleeve; 111. Slide groove; 112. Installation cavity; 113. Semi-circular groove; 114. Avoidance hole; 115. Protrusion; 116. Installation reaming; 117. Fixing hole; 121. First helical surface; 2. Brake hub; 21. Card slot; 3. Pressing sleeve head; 31. Collar; 32. Contact arm; 4. Deformable chuck; 41. Rotating arm; 5. Connecting piece; 51. Outer cylinder; 52. Inner cylinder; 53. Spring; 6. Reset piece; 7. Brake shaft; 71. Limit retaining ring; 8. Rear brake cam; 81. Second helical surface; 9. Pre-tightening torsion spring. Detailed implementation manners

[0018] In order to make the technical means, creative features, achieved purposes and functions of the present invention easy to understand, the following embodiments are combined with the attached Figure 1 to the attached Figure 2 to specifically elaborate on the technical solutions provided by the present invention, but the following content is not a limitation of the present invention.

[0019] Figure 1 is a structural diagram of an embodiment of the front brake cam of a winch of the present invention; Figure 2 is a cross-sectional view of an embodiment of the front brake cam of a winch of the present invention; Figure 3 is Figure 2 an enlarged view of part A in Figure 1 . As Figure 2 and Figure 3 shown, the front brake cam of the winch provided in this embodiment includes: a cone disc body 1, a pressing sleeve head 3, a deformable chuck 4, a connecting piece 5 and a reset piece 6. At this time, both ends of the cone disc body 1 are a conical head 11 and a sleeve 12 respectively. The hole of the sleeve 12 penetrates through the conical head 11, providing conditions for the subsequent sleeving of the cone disc body 1 on the brake shaft 7. And, a first helical surface 121 is provided on the end surface of the sleeve 12 away from the conical head 11, so that when the cone disc body 1 rotates, the height of the end surface of the sleeve 12 away from the conical head 11 can change, providing conditions for subsequent axial displacement in cooperation with the rear brake cam 8. In addition, during operation, the conical surface of the conical head 11 contacts or separates from the brake hub 2. When the conical surface of the conical head 11 contacts the brake hub 2, braking is achieved, and when the two are separated, braking is released, meeting the usage requirements.

[0020] Specifically, the pressing socket 3 is arranged in a cylindrical shape and can also be sleeved on the brake shaft 7. At this time, the pressing socket 3 is arranged at one end of the conical head 11 away from the shaft sleeve 12. And several connecting pieces 5 arranged along the axial direction of the shaft sleeve 12 are provided on the side of the pressing socket 3 close to the conical head 11, so that the pressing socket 3 can push the connecting pieces 5 to move. In addition, several sliding grooves 111 corresponding to the connecting pieces 5 one by one are formed on the outer side wall of the end of the conical head 11 away from the shaft sleeve 12, so that the connecting pieces 5 can be installed in the sliding grooves 111 in a concealed manner without affecting the conical surface of the conical head 11. At the same time, an installation cavity 112 is provided at one end of each sliding groove 111 away from the pressing socket 3. The installation and movement space is enlarged through the installation cavity 112. At this time, the deformation chuck 4 is in a rod structure, and the middle part of the deformation chuck 4 is hinged in the installation cavity 112, so that the deformation chuck 4 can swing in the installation cavity 112, providing conditions for one end of the deformation chuck 4 to protrude from the conical surface of the conical head 11 and cooperate with the card slot 21 on the brake hub 2 in the future. At this time, one end of the deformation chuck 4 is abutted against the connecting piece 5, so that the pressing socket 3 can push the deformation chuck 4 to deflect through the connecting piece 5, meeting the use requirements of the auxiliary brake. And a resetting piece 6 is arranged between the deformation chuck 4 and the installation cavity 112, that is, when the conical disc body 1 is reset in the reverse direction and the acting force of the connecting piece 5 on the deformation chuck 4 is reduced or lost, the deformation chuck 4 can automatically retract into the installation cavity 112 under the action of the resetting piece 6, closing the auxiliary brake function and meeting the normal use requirements. At the same time, at least one card slot 21 is formed on the inner wall of the brake hub 2, and the auxiliary brake is realized by the cooperation of the card slot 21 and the protruding deformation chuck 4, improving the braking reliability and having higher safety. When auxiliary braking is required, the conical disc body 1 moves towards the side of the brake hub 2 under the action of the first spiral surface 121, realizing the cooperative braking of the conical surface of the conical disc body 1 and the brake hub 2. And the pressing socket 3 moves relative to the conical disc body 1, so that the pressing socket 3 pushes the deformation chuck 4 to deflect through the connecting piece 5, so that one end of the deformation chuck 4 can extend out of the conical surface of the conical head 11 and press against the inner wall of the brake hub 2, realizing the auxiliary brake. If relative rotation accidentally occurs between the conical disc body 1 and the brake hub 2, the protruding end of the deformation chuck 4 can be clamped into the card slot 21 of the brake hub 2, realizing the clamping limit and improving the braking reliability. On the contrary, when the conical disc body 1 moves in the reverse direction, at this time, the pressing socket 3 also moves in the reverse direction relative to the conical disc body 1, and the deformation chuck 4 loses the acting force of the connecting piece 5, so that the deformation chuck 4 automatically retracts into the installation cavity 112 under the action of the resetting piece 6, releasing the auxiliary brake function, so as to be consistent with the existing brake structure and usage mode and meet the traditional use requirements, which will not be elaborated here.

[0021] More specifically, the connecting member 5 for driving the deformation chuck 4 to deflect is a telescopic rod. At this time, the telescopic rod further includes an outer cylinder 51, an inner cylinder 52, and a spring 53. During assembly, the outer cylinder 51 and the inner cylinder 52 are coaxially sleeved, and a spring 53 is provided between the inner cylinder 52 and the outer cylinder 51, so that there is a floating space for the length of the connecting member 5. That is, when the deformation chuck 4 is not aligned with the card slot 21 on the brake hub 2 under the action of the traditional brake, the deformation chuck 4 is restricted by the brake hub 2 and cannot swing. At this time, the pressing sleeve 3 will still move relative to the cone disc body 1, so that it can be adapted by the expansion and contraction of the connecting member 5, avoiding the problem of damage to the deformation chuck 4, the pressing sleeve 3, and the connecting member 5. In addition, the auxiliary brake function can be started in any braking state, and the deformation chuck 4 can automatically find the card slot 21 to achieve clamping and limiting in the case of the failure of the existing brake structure, and the structural design is more reasonable.

[0022] More specifically, the reset member 6 for driving the deformation chuck 4 to reset is a reset torsion spring. At this time, one end of the reset torsion spring is fixed on the wall of the installation cavity 112 of the conical head 11, and the other end of the reset torsion spring is fixed on the deformation chuck 4, so that the deflected deformation chuck 4 can be automatically reset under the action of the reset torsion spring, meeting the requirements for the next auxiliary brake use. And, the torsion force applied by the connecting member 5 to the deformation chuck 4 is greater than the torsion force applied by the reset torsion spring to the deformation head, that is, when the connecting member 5 drives the deformation chuck 4 to deflect, except when the deformation chuck 4 cannot be aligned with the card slot 21, the connecting member 5 can drive the deformation chuck 4 to deflect, and after deflection, the deformation chuck 4 will not be automatically reset when the connecting member 5 does not lose its acting force, and the structural design is more reasonable.

[0023] More specifically, a semi-circular groove 113 is further opened below the orifice of each installation cavity 112. At this time, the opening of the semi-circular groove 113 is arranged facing the outside of the conical surface of the conical head 11, so that the deformation chuck 4 can be installed from the opening of the semi-circular groove 113 later. And, a protruding rotating arm 41 is provided on the side wall of the middle part of each deformation chuck 4, and when the deformation chuck 4 is installed in the corresponding installation cavity 112, the rotating arm 41 is embedded in the corresponding semi-circular groove 113. The cooperation between the semi-circular groove 113 and the rotating arm 41 realizes the rapid installation of the deformation chuck 4 in the installation cavity 112, and the disassembly and assembly are more convenient. Preferably, the orifice of the semi-circular groove 113 is arranged with a constricted opening, so that the rotating arm 41 of the deformation chuck 4 will not be disengaged in the reverse direction after being caught in the semi-circular groove 113, and the structure is more reliable.

[0024] More specifically, the cone disc body 1 is sleeved on the brake shaft 7. At this time, a brake rear cam 8 is also sleeved on the brake shaft 7 and on the end of the sleeve 12 where the first helical surface 121 is provided. The brake rear cam 8 is splined to the brake shaft 7, and a second helical surface 81 that cooperates with the first helical surface 121 is provided on the end surface of the brake rear cam 8 close to the sleeve 12, that is, the second helical surface 81 of the brake rear cam 8 can cooperate with the first helical surface 121 on the brake front cam to achieve axial push on the brake front cam, so that the conical surface of the conical head 11 on the brake front cam can be pressed against the inner wall of the brake hub 2, thereby realizing the braking function of the existing structure, such as the structure in a winch brake device disclosed in patent CN102730591A, which will not be repeated here.

[0025] More specifically, a limit stop ring 71 is further provided on the brake shaft 7 and on the side of the cone disc body 1 away from the brake rear cam 8. At this time, the limit stop ring 71 is fixed on the brake shaft 7, that is, a limit structure is formed on the brake shaft 7 through the limit stop ring 71, which provides conditions for the subsequent cooperation of the pressing sleeve 3 to move relative to the cone disc body 1. In addition, the limit structure is in contact with the pressing sleeve 3, that is, when the cone disc body 1 moves toward the brake hub 2, the cone disc body 1 slides on the brake shaft 7, and the limit stop ring 71 blocks the pressing sleeve 3 at this time, so that the pressing sleeve 3 moves relative to the cone disc body 1, so that the pressing sleeve 3 acts on the deformation clamp 4 through the connecting member 5, meeting the auxiliary braking requirements.

[0026] More specifically, a gap is provided between the limit stop ring 71 and the pressing sleeve 3, so that the pressing sleeve 3 needs to follow the cone disc body 1 to move a predetermined distance before it contacts the limit stop ring 71, that is, when the cone disc body 1 initially moves a predetermined distance toward the brake hub 2, it will first cooperate with the brake hub 2 to brake, and at this time the pressing sleeve 3 follows the movement of the cone disc body 1, and when the cone disc body 1 is close to moving to the end state, the limit stop ring 71 contacts the pressing sleeve 3, and the cone disc body 1 continues to move so that the cone disc body 1 and the pressing sleeve 3 move relative to each other, thereby pushing the deformation clamp 4 to deflect through the connecting member 5 to achieve auxiliary braking, that is, the auxiliary brake is only started at the end of the normal operation of the existing brake structure, thereby meeting the use demand of auxiliary brake when the load on the brake shaft 7 is too heavy, and also avoiding the problem of excessive size of the structural parts required due to excessive changes caused by premature startup of the auxiliary brake structure, and the structural design is more reasonable.

[0027] More specifically, the pressing sleeve 3 further includes a collar 31 and contact arms 32. Preferably, the collar 31 and the contact arms 32 are of an integral structure, with higher structural strength. At this time, the collar 31 is sleeved on the brake shaft 7 so that the collar 31 can slide on the brake shaft 7. At the same time, several contact arms 32 extending radially are provided at one end of the collar 31 close to the conical head 11. The contact arms 32 expand the scope of action of the collar 31, providing conditions for subsequent action on the connecting member 5 in the chute 111. At the same time, several avoidance holes 114 are radially formed at one end of the conical head 11 facing away from the shaft sleeve 12, and one avoidance hole 114 corresponds to one chute 111. The contact arms 32 are arranged in the avoidance holes 114 and one end abuts against the connecting member 5. Preferably, the avoidance holes 114 are strip-shaped holes arranged axially along the brake shaft 7, providing conditions for subsequent relative movement of the pressing sleeve 3 with respect to the conical disc body 1. In addition, one end of the avoidance hole 114 penetrates the end face of the conical head 11 facing away from the rear sleeve, facilitating the installation of the contact arms 32 in the avoidance holes 114, and the structural design is more reasonable.

[0028] More specifically, several convex blocks 115 extending towards the inside of the chute are further provided at the notch of the chute 111. The convex blocks 115 reduce the notch size of the chute 111, so that when the connecting member 5 is subsequently installed in the chute 111, the connecting member 5 can be pressed by the convex blocks 115 to prevent the connecting member 5 from slipping out of the chute 111, and the structural design is more reasonable.

[0029] More specifically, an installation enlarged hole 116 is further formed at one end of the conical head 11 facing away from the shaft sleeve 12. At this time, it is set that the aperture of the installation enlarged hole 116 is larger than the outer diameter of the collar 31. During subsequent installation, one end of a pre-tightening torsion spring 9 is inserted into the installation enlarged hole 116, and the pre-tightening torsion spring 9 is sleeved outside the collar 31 and there is a gap between the pre-tightening torsion spring 9 and the collar 31, so that the pre-tightening torsion spring 9 can cooperate with the conical disc body 1 through the installation enlarged hole 116. At the same time, a fixing hole 117 is further formed in the installation enlarged hole 116, and one end of the pre-tightening torsion spring 9 is inserted into the fixing hole 117, realizing the installation of one end of the pre-tightening torsion spring 9 on the conical disc body 1. And the other end of the pre-tightening torsion spring 9 is fixed on the brake shaft 7. The pre-tightening torsion spring 9 enables the front brake cam and the rear brake cam 8 to be in a semi-clutch state, and can also stagger the lugs of the front brake cam and the rear brake cam 8 by a predetermined angle through the pre-tightening torsion spring 9 to meet the usage requirements of traditional brakes. Since its structure has been disclosed in Patent CN102730591A, it will not be elaborated here. By sleeving the pre-tightening torsion spring 9 outside the collar 31 and setting a gap between the pre-tightening torsion spring 9 and the collar 31, it can not only ensure the normal operation of the pre-tightening torsion spring 9 and meet the usage requirements of the existing brake structure, but also not interfere with the collar 31 and meet the auxiliary brake requirements, and the structural design is more reasonable.

[0030] The winch brake front cam provided in this embodiment includes a cone disc body 1, a pressing sleeve 3, a deformation clamp 4, a connecting piece 5 and a reset piece 6; the pressing sleeve 3 is provided at one end of the cone disc body 1 away from the first spiral surface 121, and a plurality of slide grooves 111 with connecting pieces 5 are provided on the conical head 11 of the cone disc body 1, and at the same time, an installation cavity 112 is provided at one end of the slide groove 111 away from the pressing sleeve 3, and a deformation clamp 4 is hinged in the installation cavity 112, one end of the deformation clamp 4 is in contact with the connecting piece 5, and on the brake hub 2 At least one card slot 21 is provided, so that when the load is heavy and auxiliary braking is required, when the cone disc body 1 moves toward the brake hub 2 under the action of the first spiral surface 121, the pressing sleeve 3 moves relative to the cone disc body 1, so that the pressing sleeve 3 pushes the deformation card head 4 through the connecting piece 5 so that the deformation card head 4 protrudes out of the conical surface of the cone head 11, and the deformation card head 4 is inserted into the card slot 21 to realize the card connection and limit of the cone disc body 1 and the brake hub 2, thereby realizing auxiliary braking. Compared with the existing method that only relies on contact friction, the braking is more reliable and safer.

[0031] The above are only preferred embodiments of the present invention, and are not intended to limit the implementation methods and protection scope of the present invention. Those skilled in the art should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A winch brake front cam, comprising a cone disc body, the cone surface of which cooperates with a brake hub, characterized in that: Also includes: A pressing sleeve, a deformation clamp, a connecting piece and a reset piece, one end of the cone disc body is a conical head, the other end of the cone disc body is provided with a sleeve, the end face of the sleeve away from the conical head is provided with a first spiral surface, the conical surface of the conical head is in contact with or separated from the brake hub, the pressing sleeve is arranged in a cylindrical shape, the pressing sleeve is arranged at the end of the conical head away from the sleeve, and the side of the pressing sleeve close to the conical head is provided with a plurality of the Connecting piece, a plurality of slide grooves corresponding to the connecting piece are provided on the outer side wall of the end of the conical head away from the sleeve, and at the same time, an installation cavity is provided on the end of each slide groove away from the pressing sleeve head, the deformation clamp is a rod structure, the middle part of the deformation clamp is hinged in the installation cavity, one end of the deformation clamp is in contact with the connecting piece, and the reset piece is provided between the deformation clamp and the installation cavity, and at least one groove is provided on the inner wall of the brake hub.

2. The winch brake front cam according to claim 1, characterized in that: The connecting piece is a telescopic rod, which includes an outer tube, an inner tube and a spring. The outer tube and the inner tube are coaxially sleeved, and a spring is arranged between the inner tube and the outer tube.

3. The winch brake front cam according to claim 1, characterized in that: The reset member is a reset torsion spring, one end of which is fixed to the cavity wall of the mounting cavity of the conical head, and the other end of which is fixed to the deformation clamp, and the torque loaded on the deformation clamp by the connecting member is greater than the torque loaded on the deformation head by the reset torsion spring.

4. The winch brake front cam according to claim 1, characterized in that: A semicircular groove is provided below the cavity opening of each installation cavity, and the opening of the semicircular groove is arranged toward the outer side of the conical surface of the conical head. A protruding rotating arm is provided on the side wall of the middle part of each deformation clamp, and when the deformation clamp is installed in the corresponding installation cavity, the rotating arm is embedded in the corresponding semicircular groove.

5. The winch brake front cam according to claim 1, characterized in that: The cone disc body is sleeved on the brake shaft, and a brake rear cam is sleeved on the end of the brake shaft and located on the sleeve where the first helical surface is provided. The brake rear cam is spline-connected to the brake shaft, and a second helical surface that cooperates with the first helical surface is provided on the end surface of the brake rear cam close to the sleeve.

6. The winch brake front cam according to claim 5, characterized in that: A limit stop ring is arranged on the brake shaft and located on the side of the cone disc body away from the brake rear cam. The limit stop ring is fixed on the brake shaft and contacts the pressing sleeve.

7. The winch brake front cam according to claim 6, characterized in that: A gap is arranged between the limit stop ring and the pressing sleeve.

8. The winch brake front cam according to claim 1, characterized in that: The pressing sleeve head includes a ring and a contact arm, the ring is sleeved on the brake shaft, and one end of the ring close to the conical head is provided with a plurality of contact arms extending radially thereof. At the same time, the conical head is provided with a plurality of avoidance holes radially opened at one end away from the sleeve, and one avoidance hole corresponds to a slide groove, the contact arm is arranged in the avoidance hole and one end thereof is pressed against the connecting piece.

9. The winch brake front cam according to claim 1, characterized in that: A plurality of protrusions extending toward the inside of the groove are arranged at the notch of the slide groove, and when the connecting member is located in the slide groove, the protrusions press the connecting member.

10. The winch brake front cam according to claim 8, characterized in that: A mounting hole is also provided at the end of the conical head away from the sleeve, the diameter of the mounting hole is larger than the outer diameter of the ring, one end of a preloaded torsion spring extends into the mounting hole, and the preloaded torsion spring is sleeved outside the ring with a gap between the preloaded torsion spring and the ring. At the same time, a fixing hole is provided in the mounting hole, and one end of the preloaded torsion spring is inserted into the fixing hole.

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