Reciprocating take-up and pay-off device realized by utilizing cylindrical cam

Abstract

The invention discloses a reciprocating type take-up and pay-off device achieved through a cylindrical cam. The reciprocating type take-up and pay-off device comprises a supporting frame, a winding reel, a motor, a winding assembly, a guide rod, the cylindrical cam, a large gear, a synchronous belt and a small gear. The supporting frame comprises two supporting plates, the winding reel is located in a cavity formed by the two supporting plates in a clamping mode, one end of the winding reel is connected with the motor, and the other end of the winding reel is connected with the small gear. Fixing plates are installed above the two supporting plates, guide rods and cylindrical cams located below the guide rods are installed on the fixing plates, one ends of the cylindrical cams penetrate through the fixing plates to be connected with large gears, and synchronous belts are assembled outside the large gears and the small gears. A winding assembly with a cable hole is assembled on a rod body of the guide rod and a rod body of the cylindrical cam, and the winding assembly conducts reciprocating rectilinear motion in the length direction of the guide rod along with rotation of the cylindrical cam under the positioning effect of the guide rod, so that a cable penetrating through the cable hole is wound on the outer side wall of a winding reel which conducts rotating motion. And the cables are orderly wound and unwound layer by layer.

Description

Technical Field

[0001] The invention relates to the field of cable retraction and release, and in particular to a reciprocating cable retraction and release device realized by a cylindrical cam. Background Art

[0002] In daily life, it is often necessary to wind cables neatly on a reel for easy collection and storage. When in use, the cables can be released from the reel in an orderly manner without being tangled or messy. Currently, the common retractable devices are spiral spring type and folding type, which are mainly used in various occasions where cables need to be collected and released on mobile carriers.

[0003] The spiral spring type wire-retracting and -releasing device integrates a steel spiral spring and a cable. The two ends of the cable are respectively fixed on two objects that move relative to each other. The cable is released by pulling with external force, and is retracted by the elastic force of the spring. Therefore, the length of the cable cannot be too long, otherwise the elastic force of the spring cannot retract the cable. At the same time, the elastic coefficient of the spring cannot be too large, otherwise the cable cannot be effectively released. The elastic coefficient cannot be too small, otherwise the cable cannot be stored regularly and orderly after being retracted.

[0004] The foldable cable retracting device is composed of multiple rectangular tubes stacked up and down, with the two ends of the rectangular tubes connected by hinges. The rectangular tubes can reach a certain height when unfolded, and only occupy a smaller height when folded. The cables are fixed inside the rectangular tubes, and the two ends of the entire device are respectively fixed on two objects with relative motion (up and down motion). The cables are released by pulling the rectangular tubes with external force, and can only be retracted by their own gravity. Therefore, the foldable cable retracting device is only suitable for occasions where the cables are retracted vertically. When working in an inclined state, it is also easy to interfere and be damaged. Summary of the invention

[0005] The object of the present invention is to provide a reciprocating wire-reeling and winding device realized by a cylindrical cam, comprising a support frame, a winding drum, a motor, a winding assembly, a guide rod, a cylindrical cam, a large gear, a synchronous belt and a small gear.

[0006] The support frame comprises two support plates with through holes.

[0007] A cavity is sandwiched between the two support plates.

[0008] The winding drum is located in the cavity, one end of which is connected to the motor, and the other end of which is connected to the pinion gear.

[0009] A fixing plate is installed above the two support plates.

[0010] The guide rod and the cylindrical cam are mounted on the fixing plate.

[0011] The rod body of the cylindrical cam is provided with a right-handed cam groove and a left-handed cam groove, the starting point and the end point of which are coincident.

[0012] One end of the cylindrical cam passes through the fixing plate and is connected with the large gear.

[0013] The large gear and the small gear are located on the same side of the support frame.

[0014] The large gear and the small gear are externally equipped with a synchronous belt.

[0015] The guide rod is located above the cylindrical cam.

[0016] The guide rod and the rod body of the cylindrical cam are equipped with a winding assembly.

[0017] The winding assembly is provided with a cable hole.

[0018] Under the positioning action of the guide rod, the winding assembly performs reciprocating linear motion along the length direction of the guide rod as the cylindrical cam rotates, so that the cable passing through the cable hole is wound on the outer side wall of the rotating winding drum.

[0019] Furthermore, the axes of the winding drum, the guide rod and the cylindrical cam are parallel.

[0020] Furthermore, the joining surface where the starting point and the end point of the right-handed cam groove and the left-handed cam groove overlap is transitioned through an arc to form a transition arc at the intersection of the two cam grooves.

[0021] Furthermore, the lead of the right-handed cam groove and the left-handed cam groove is equal to 2 to 2.5 times the diameter of the cable.

[0022] Furthermore, the winding assembly includes a cam follower and a sliding block.

[0023] The sliding block is provided with a hole I and a hole II, and the axis of the hole I is orthogonal to the axis of the hole II.

[0024] The shaft of the cylindrical cam passes through hole I.

[0025] The cam follower is located in the hole II, has a clearance fit with the hole II, and can rotate in the hole II.

[0026] The cam follower comprises a cylindrical body at an upper end and a crescent portion at a lower end.

[0027] The crescent portion extends into the hole I and matches with the right-handed cam groove or the left-handed cam groove on the cylindrical cam.

[0028] When the cylindrical cam rotates, the cam follower moves in the cam groove. When it moves to the position where the starting points or end points of the two cam grooves overlap, the cam follower will automatically rotate and switch to the other cam groove, and move in the opposite direction in the other cam groove.

[0029] Furthermore, the winding assembly also includes a limiting cover and a wire pressing block.

[0030] A limit cover is arranged above the sliding block and the cam follower to limit the up and down movement of the cam follower.

[0031] The lower end of the sliding block and the wire pressing block are both provided with semicircular grooves, and the wire pressing block is fixed to the sliding block by fastening screws so that the semicircular grooves provided on the two are aligned to form a cylindrical cable hole.

[0032] Furthermore, the diameter of the cam follower cylinder is equal to the diameter of the cylindrical cam, so that the length of the crescent portion is more than twice the width of the gap, and the width of the gap is the width of the gap generated at the intersection of the two cam grooves.

[0033] Furthermore, the gear ratio between the large gear and the small gear is 2 to 2.5.

[0034] Furthermore, when the line is taken up, the motor works and drives the winding drum to rotate, and the cable is automatically wound around the winding drum.

[0035] At the same time, the rotation of the winding drum drives the rotation of the small gear, the large gear and the cylindrical cam. The winding assembly moves in a straight line under the rotation of the cylindrical cam, and the cable is wound neatly and regularly on the winding drum. When the winding drum is full of a layer of cable, the winding assembly will automatically reverse and move in the opposite direction to wind a second layer of cable on the winding drum. This process is repeated until all the cables are collected.

[0036] The object of the present invention is to provide another reciprocating wire-reeling and winding device realized by a cylindrical cam, comprising a support frame, a winding drum, a winding assembly, a guide rod, a cylindrical cam, a large gear, a hand crank, a synchronous belt and a small gear.

[0037] The support frame comprises two support plates with through holes.

[0038] A cavity is sandwiched between the two support plates.

[0039] The winding drum is located in the cavity, and one end of the winding drum is connected to the pinion gear.

[0040] A fixing plate is installed above the two support plates.

[0041] The guide rod and the cylindrical cam are mounted on the fixing plate.

[0042] One end of the cylindrical cam passes through a fixed plate and is connected to a large gear equipped with a hand crank.

[0043] The large gear and the small gear are located on the same side of the support frame.

[0044] The large gear and the small gear are externally equipped with a synchronous belt.

[0045] The guide rod is located above the cylindrical cam.

[0046] The guide rod and the rod body of the cylindrical cam are equipped with a winding assembly.

[0047] The winding assembly is provided with a cable hole.

[0048] Under the positioning action of the guide rod, the winding assembly performs reciprocating linear motion along the length direction of the guide rod as the cylindrical cam rotates, so that the cable passing through the cable hole is wound on the outer side wall of the rotating winding drum.

[0049] The technical effect of the present invention is unquestionable, and the beneficial effects of the present invention are as follows:

[0050] 1. The length of the retractable cable of the present invention is relatively long, which can reach hundreds of meters. It can be used not only for retracting and releasing cables on mobile carriers such as vehicles and ships, but also for retracting and releasing cables on tethered rotorcraft;

[0051] 2. The winding assembly of the present invention can reel the cable in layers on the reel in a regular and orderly manner, and release the cable in a regular and orderly manner;

[0052] 3. The present invention can work in any working state, such as tilted, inverted, or vertical;

[0053] 4. The one-way transmission feature of the cylindrical cam in the present invention ensures that the cable will not drag the winding drum, that is, when the motor (or hand crank) is not working, the cable will not be automatically released or retracted;

[0054] 5. In the present invention, the cam follower follows the law of cosine acceleration when switching, and only produces a flexible impact, so the effect of medium-speed cable retraction and release can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] Figure 1 It is a structural diagram of the present invention.

[0056] Figure 2 This is a structural diagram of the winding assembly.

[0057] Figure 3 This is a structural diagram of a cylindrical cam with only a right-hand cam groove.

[0058] Figure 4 This is a structural diagram of a cylindrical cam with only a left-hand cam groove.

[0059] Figure 5 This is a structural diagram of a cylindrical cam with a bidirectional cam groove.

[0060] Figure 6 is a front view of the cam follower.

[0061] Figure 7 is a bottom view of the cam follower.

[0062] In the figure: 1-support frame; 101-support plate; 2-winding drum; 3-motor; 4-winding assembly; 401-cam follower; 4011-cylinder; 4012-crescent; 402-limiting cover; 403-sliding block; 404-pressing block; 405-cable hole; 406-fastening screw; 5-guide rod; 6-cylindrical cam; 601-right-hand cam groove; 602-left-hand cam groove; 603-transition arc at the intersection of two cam grooves; 7-large gear; 8-hand crank; 9-synchronous belt; 10-small gear. DETAILED DESCRIPTION

[0063] The present invention is further described below in conjunction with the embodiments, but it should not be understood that the above subject matter of the present invention is limited to the following embodiments. Without departing from the above technical ideas of the present invention, various substitutions and changes are made according to the common technical knowledge and customary means in the art, which should all be included in the protection scope of the present invention.

[0064] Embodiment 1:

[0065] The invention discloses a reciprocating wire-winding and -releasing device realized by a cylindrical cam, which reels and releases the wire through a motor. The device comprises a support frame 1, a winding drum 2, a motor 3, a winding assembly 4, a guide rod 5, a cylindrical cam 6, a large gear 7, a synchronous belt 9 and a small gear 10.

[0066] The support frame 1 includes two support plates 101 with through holes at two ends of the support frame 1. A cavity is sandwiched between the two support plates 101.

[0067] The winding drum 2 is located in the cavity, one end of which is connected to the motor 3 , and the other end of which is connected to the pinion 10 .

[0068] A fixing plate is installed above the two support plates 101 .

[0069] The guide rod 5 and the cylindrical cam 6 are mounted on a fixed plate.

[0070] The rod body of the cylindrical cam 6 is provided with a right-handed cam groove 601 and a left-handed cam groove 602 whose starting point and end point are coincident.

[0071] The right-handed cam groove 601 and the left-handed cam groove 602 are arranged alternately.

[0072] One end of the cylindrical cam 6 passes through the fixing plate and is connected to the large gear 7 .

[0073] The large gear 7 and the small gear 10 are located on the same side of the support frame 1 .

[0074] The large gear 7 and the small gear 10 are externally equipped with a synchronous belt 9 .

[0075] The guide rod 5 is located above the cylindrical cam 6 .

[0076] The guide rod 5 and the cylindrical cam 6 are provided with a winding assembly 4 .

[0077] The winding assembly 4 has a cable hole 405 .

[0078] Under the positioning action of the guide rod 5, the winding assembly 4 performs reciprocating linear motion along the length direction of the guide rod 5 as the cylindrical cam 6 rotates, so that the cable passing through the cable hole 405 is wound around the outer side wall of the rotating winding drum 2.

[0079] Embodiment 2:

[0080] The main structure of this embodiment is the same as that of Embodiment 1. Furthermore, the axes of the winding drum 2, the guide rod 5 and the cylindrical cam 6 are parallel.

[0081] Embodiment 3:

[0082] The main structure of this embodiment is the same as any one of Embodiments 1 to 2. Furthermore, the joint surface where the starting point and the end point of the right-handed cam groove 601 and the left-handed cam groove 602 coincide is transitioned through an arc to form a transition arc 603 at the intersection of the two cam grooves.

[0083] Embodiment 4:

[0084] The main structure of this embodiment is the same as any one of Embodiments 1 to 3. Furthermore, the lead of the right-handed cam groove 601 and the left-handed cam groove 602 is equal to 2 to 2.5 times the diameter of the cable.

[0085] Embodiment 5:

[0086] The main structure of this embodiment is the same as any one of Embodiments 1 to 3. Furthermore, the lead of the right-handed cam groove 601 and the left-handed cam groove 602 is equal to twice the diameter of the cable.

[0087] Embodiment 6:

[0088] The main structure of this embodiment is the same as any one of Embodiments 1 to 3. Furthermore, the lead of the right-handed cam groove 601 and the left-handed cam groove 602 is equal to 2.5 times the diameter of the cable.

[0089] Embodiment 7:

[0090] The main structure of this embodiment is the same as any one of Embodiments 1 to 6. Furthermore, the winding assembly 4 includes a cam follower 401 and a sliding block 403 .

[0091] The sliding block 403 is provided with a hole I and a hole II, and the axis of the hole I is orthogonal to the axis of the hole II.

[0092] The shaft of the cylindrical cam 6 passes through the hole I.

[0093] The cam follower 401 is located in the hole II, has a clearance fit with the hole II, and can rotate in the hole II.

[0094] The cam follower 401 includes a cylindrical body 4011 at an upper end and a crescent portion 4012 at a lower end.

[0095] The crescent portion 4012 extends into the hole I and matches with the right-handed cam groove 601 or the left-handed cam groove 602 on the cylindrical cam 6.

[0096] When the cylindrical cam 6 rotates, the cam follower 401 moves in the cam groove. When it moves to the position where the starting points or end points of the two cam grooves overlap, the cam follower 401 will automatically rotate and switch to the other cam groove, and move in the opposite direction in the other cam groove.

[0097] Embodiment 8:

[0098] The main structure of this embodiment is the same as that of Embodiment 7. Furthermore, the winding assembly 4 also includes a limiting cover 402 and a wire pressing block 404 .

[0099] A limit cover 402 is disposed above the sliding block 403 and the cam follower 401 to limit the up and down movement of the cam follower 401 .

[0100] Semicircular grooves are provided on the lower end of the sliding block 403 and the wire pressing block 404 ; the wire pressing block 404 is fixed to the sliding block 403 by fastening screws 406 so that the semicircular grooves provided on the two are aligned to form a cylindrical cable hole 405 .

[0101] Embodiment 9:

[0102] The main structure of this embodiment is the same as any one of Embodiments 7 to 8. Furthermore, the diameter of the cylinder of the cam follower 401 is approximately equal to the diameter of the cylindrical cam 6, so that the length of the crescent portion 4012 is more than twice the width of the gap, and the width of the gap is the width of the gap generated at the intersection of the two cam grooves.

[0103] Embodiment 10:

[0104] The main structure of this embodiment is the same as any one of Embodiments 1 to 9. Furthermore, the gear ratio between the large gear 7 and the small gear 10 is 2 to 2.5.

[0105] Embodiment 11:

[0106] The main structure of this embodiment is the same as any one of Embodiments 1 to 9. Furthermore, the gear ratio between the large gear 7 and the small gear 10 is 2.

[0107] Embodiment 12:

[0108] The main structure of this embodiment is the same as any one of Embodiments 1 to 9. Furthermore, the gear ratio between the large gear 7 and the small gear 10 is 2.5.

[0109] Embodiment 13:

[0110] The main structure of this embodiment is the same as any one of Embodiments 1 to 12. Furthermore, when winding the wire, the motor 3 works and drives the winding drum 2 to rotate. At this time, the cable will be automatically wound around the winding drum 2.

[0111] At the same time, the rotation of the winding drum 2 drives the rotation of the small gear 10, the large gear 7 and the cylindrical cam 6. The winding assembly 4 moves linearly under the rotation of the cylindrical cam 6, and the cable is wound regularly and neatly on the winding drum 2. When the winding drum 2 is full of a layer of cable, the winding assembly 4 will automatically reverse and move in the opposite direction to wind a second layer of cable on the winding drum 2. This process is repeated until all the cables are collected.

[0112] Embodiment 14:

[0113] The reciprocating wire-winding and -releasing device realized by a cylindrical cam reels and releases the wire by hand cranking. The device comprises a support frame 1, a winding drum 2, a winding assembly 4, a guide rod 5, a cylindrical cam 6, a large gear 7, a hand crank 8, a synchronous belt 9 and a small gear 10.

[0114] The support frame 1 includes two support plates 101 with through holes at two ends of the support frame 1. A cavity is sandwiched between the two support plates 101.

[0115] The winding drum 2 is located in the cavity, and one end of the winding drum is connected to the pinion gear 10 .

[0116] A fixing plate is installed above the two support plates 101 .

[0117] The guide rod 5 and the cylindrical cam 6 are mounted on a fixed plate.

[0118] One end of the cylindrical cam 6 passes through a fixed plate and is connected to a large gear 7 equipped with a hand crank 8 .

[0119] The large gear 7 and the small gear 10 are located on the same side of the support frame 1 .

[0120] The large gear 7 and the small gear 10 are externally equipped with a synchronous belt 9 .

[0121] The guide rod 5 is located above the cylindrical cam 6 .

[0122] The guide rod 5 and the cylindrical cam 6 are provided with a winding assembly 4 .

[0123] The winding assembly 4 is provided with a cable hole 405 .

[0124] Under the positioning action of the guide rod 5, the winding assembly 4 performs reciprocating linear motion along the length direction of the guide rod 5 as the cylindrical cam 6 rotates, so that the cable passing through the cable hole 405 is wound around the outer side wall of the rotating winding drum 2.

[0125] Embodiment 15:

[0126] The main structure of this embodiment is the same as that of Embodiment 14. Furthermore, the axes of the winding drum 2, the guide rod 5 and the cylindrical cam 6 are parallel.

[0127] Embodiment 16:

[0128] The main structure of this embodiment is the same as any one of Embodiments 14 to 15. Furthermore, the joint surface where the starting point and the end point of the right-handed cam groove 601 and the left-handed cam groove 602 coincide is transitioned through an arc to form a transition arc 603 at the intersection of the two cam grooves.

[0129] Embodiment 17:

[0130] The main structure of this embodiment is the same as any one of Embodiments 14 to 16. Furthermore, the lead of the right-handed cam groove 601 and the left-handed cam groove 602 is equal to 2 to 2.5 times the diameter of the cable.

[0131] Embodiment 18:

[0132] The main structure of this embodiment is the same as any one of Embodiments 14 to 16. Furthermore, the lead of the right-handed cam groove 601 and the left-handed cam groove 602 is equal to twice the diameter of the cable.

[0133] Embodiment 19:

[0134] The main structure of this embodiment is the same as any one of Embodiments 14 to 16. Furthermore, the lead of the right-handed cam groove 601 and the left-handed cam groove 602 is equal to 2.5 times the diameter of the cable.

[0135] Embodiment 20:

[0136] The main structure of this embodiment is the same as any one of Embodiments 14 to 19. Furthermore, the winding assembly 4 includes a cam follower 401 and a sliding block 403.

[0137] The sliding block 403 is provided with a hole I and a hole II, and the axis of the hole I is orthogonal to the axis of the hole II.

[0138] The shaft of the cylindrical cam 6 passes through the hole I.

[0139] The cam follower 401 is located in the hole II, has a clearance fit with the hole II, and can rotate in the hole II.

[0140] The cam follower 401 includes a cylindrical body 4011 at an upper end and a crescent portion 4012 at a lower end.

[0141] The crescent portion 4012 extends into the hole I and matches with the right-handed cam groove 601 or the left-handed cam groove 602 on the cylindrical cam 6.

[0142] When the cylindrical cam 6 rotates, the cam follower 401 moves in the cam groove. When it moves to the position where the starting points or end points of the two cam grooves overlap, the cam follower 401 will automatically rotate and switch to the other cam groove, and move in the opposite direction in the other cam groove.

[0143] Embodiment 21:

[0144] The main structure of this embodiment is the same as that of Embodiment 20. Furthermore, the winding assembly 4 also includes a limiting cover 402 and a wire pressing block 404.

[0145] A limit cover 402 is disposed above the sliding block 403 and the cam follower 401 to limit the up and down movement of the cam follower 401 .

[0146] Semicircular grooves are provided on the lower end of the sliding block 403 and the wire pressing block 404 . The wire pressing block 404 is fixed to the sliding block 403 by fastening screws 406 so that the semicircular grooves provided on the two are aligned to form a cylindrical cable hole 405 .

[0147] Embodiment 22:

[0148] The main structure of this embodiment is the same as any one of Embodiments 20 to 21. Furthermore, the diameter of the cylinder of the cam follower 401 is approximately equal to the diameter of the cylindrical cam 6, so that the length of the crescent portion 4012 is more than twice the width of the gap, and the width of the gap is the width of the gap generated at the intersection of the two cam grooves.

[0149] Embodiment 23:

[0150] The main structure of this embodiment is the same as any one of Embodiments 14 to 22. Furthermore, the gear ratio between the large gear 7 and the small gear 10 is 2 to 2.5.

[0151] Embodiment 24:

[0152] The main structure of this embodiment is the same as any one of Embodiments 14 to 22. Furthermore, the gear ratio between the large gear 7 and the small gear 10 is 2.

[0153] Embodiment 25:

[0154] The main structure of this embodiment is the same as any one of Embodiments 14 to 22. Furthermore, the gear ratio between the large gear 7 and the small gear 10 is 2.5.

[0155] Embodiment 26:

[0156] The main structure of this embodiment is the same as any one of Embodiments 14 to 25. Furthermore, when winding the line, the large gear 7 is driven to rotate by the hand crank 8, and the large gear 7 further drives the small gear 10 and the winding drum 2 to rotate through the synchronous belt 9. At this time, the cable will be automatically wound around the winding drum 2.

[0157] At the same time, the rotation of the large gear 7 further drives the rotation of the cylindrical cam 6. The winding assembly 4 moves linearly under the rotation of the cylindrical cam 6, and the cable is regularly and neatly wound on the winding drum 2. When the winding drum 2 is full of a layer of cable, the winding assembly 4 will automatically reverse and move in the opposite direction to wind a second layer of cable on the winding drum 2. This process is repeated until all the cables are collected.

[0158] Embodiment 27:

[0159] The main structure of this embodiment is the same as any one of Embodiments 1 to 26. Furthermore, the support frame 1 is arranged at both ends, and is the installation base and bearing base of the present invention, and most of the parts are assembled on it.

[0160] The winding drum 2 is horizontally mounted in the middle of the support frame 1, with the motor 3 mounted on the left end and the pinion 10 mounted on the right end.

[0161] The guide rod 5 and the cylindrical cam 6 are horizontally installed on the upper end of the base support frame 1, and the winding assembly 4 is assembled with the guide rod 5 and the cylindrical cam 6 at the same time. The outer end of the cylindrical cam 6 is equipped with a large gear 7, and a foldable hand crank 8 is provided on its end surface.

[0162] The large gear 7 and the small gear 10 are connected by a synchronous belt 9 to achieve non-slip transmission. The entire structural layout is shown in Figure 1 .

[0163] In the present invention, the function of the wire reel 2 is to wind the cable thereon; the function of the winding assembly 4 is to ensure that the cable is regularly and neatly wound up in one layer and then continues to wind up the next layer; the function of the cylindrical cam 6 is to make the winding assembly 4 reciprocate left and right; the function of the guide rod 5 is to prevent the winding assembly 4 from rotating and ensure the linear motion of the winding assembly 4; the large gear 7, the small gear 10 and the synchronous belt 9 are used for transmission; the function of the motor 3 and the hand crank 8 is used for electric and manual retraction and release of the cable.

[0164] The upper end of the cam follower 401 in the winding assembly 4 is a cylinder 4011, which fits with the hole gap of the sliding block 403 and can rotate in the hole of the sliding block 403; the top end is limited by a limit cover 402 to limit one degree of freedom of movement to ensure that it does not move upward.

[0165] The lower end of the cam follower 401 is a flat crescent 4012 that cooperates with the right-handed cam groove 601 (or the left-handed cam groove 602 ) of the cylindrical cam 6 .

[0166] When the cylindrical cam 6 rotates, the cam follower 401 moves in the cam groove, and when it moves to the transition arc 603 where the two cam grooves intersect, it automatically switches to the other cam groove, and the cam follower 401 automatically rotates and performs a reversing (reverse) motion.

[0167] The wire pressing block 404 is a detachable part, and its function is to facilitate the installation of the cable into the cable hole 405, and then fix it on the sliding block 403 with screws 406.

[0168] When the cam follower 401 changes direction at the transition arc 603 where the two cam grooves intersect, it follows the law of cosine acceleration motion, has a sudden change in speed, and only produces a flexible impact, which will not damage any mechanism and parts in the present invention. Therefore, the present invention has high reliability.

[0169] The cam follower 401 can only be driven by the cylindrical cam to move, but cannot drive the cam in the opposite direction. Therefore, when the present invention stops working, the cable is locked and will not slide off automatically.

[0170] 1) The left-handed and right-handed cam grooves are machined on the cylindrical cam 6 at the same time. The starting and ending points of the two cam grooves completely overlap, and the joint surfaces at the overlap are transitioned with circular arcs. The lead of the cam groove is equal to 2 to 2.5 times the diameter of the cable;

[0171] 2) The gear ratio between the large gear 7 and the small gear 10 is 2 to 2.5 times:

[0172] 3) The diameter of the cylinder of the cam follower 401 is approximately equal to the diameter of the bidirectional cam, so that the span of the crescent is more than twice the width of the gap generated at the intersection of the two cam grooves.

[0173] Embodiment 28:

[0174] The main structure of this embodiment is the same as any one of the embodiments 1 to 27. Furthermore, when winding the wire, the motor 3 works and drives the winding drum 2, and the cable is wound on the winding drum 2. At the same time, the small gear 10 at the right end of the winding drum drives the large gear 7 and the cylindrical cam 6 to rotate through the synchronous belt 9. The winding assembly 4 moves linearly under the drive of the cam follower 401, and the cable is wound regularly and neatly on the winding drum. When one layer is covered, the winding assembly 4 automatically reverses and moves in the opposite direction to wind the second layer, and repeats this process until the cable is completely wound. Paying off the wire is the reverse process of taking it in. The present invention can also be manually operated by a hand crank 8 to achieve winding and paying off the wire.

[0175] Embodiment 29:

[0176] The main structure of this embodiment is the same as any one of Embodiments 1 to 28. Furthermore, the winding assembly 4 includes a cam follower 401 , a limiting cover 402 and a sliding block 403 .

[0177] The upper end of the cam follower 401 is a cylinder 4011, which fits with the hole gap of the sliding block 403 and can rotate in the hole of the sliding block 403; the lower end is a flat crescent 4012, which fits with the right-handed cam groove 601 (or the left-handed cam groove 602) of the cylindrical cam 6.

[0178] The present invention realizes linear motion and automatic reversing by utilizing the principle of cam mechanism.

[0179] The cam groove of the cylindrical cam 6 cooperates with the cam follower 401 . When the cylindrical cam 6 rotates, the cam follower 401 moves in the cam groove of the cylindrical cam 6 and only moves in a straight line under the restriction of the guide rod 5 .

[0180] After the cylindrical surface of the cam follower 401 cooperates with the circular hole of the sliding block 403, two degrees of freedom of movement and two degrees of freedom of rotation are constrained. The upper end of the cam follower 401 is constrained by one degree of freedom of movement by the limit cover 402, and one degree of freedom is not constrained. The unconstrained degree of freedom is used for the cam follower 401 to rotate freely in the sliding block 403. When the cam follower 401 moves along the left-handed (right-handed) cam groove to the transition arc 603 where the right-handed (left-handed) cam groove intersects, the cam follower 401 automatically rotates under the guidance of the arc joint surface of the cam groove and switches to the right-handed (left-handed) cam groove. When the rotation direction of the cylindrical cam remains unchanged, the cam follower 401 moves along the right-handed (left-handed) cam groove, thereby realizing automatic reversing.

Claims

1. A reciprocating wire-reeling and retracting device realized by a cylindrical cam, characterized in that: It comprises a support frame (1), a winding drum (2), a motor (3), a winding assembly (4), a guide rod (5), a cylindrical cam (6), a large gear (7), a synchronous belt (9) and a small gear (10); The support frame (1) comprises two support plates (101) with through holes; A cavity is sandwiched between the two support plates (101); The winding drum (2) is located in the cavity, one end of which is connected to the motor (3) and the other end of which is connected to the pinion (10); A fixing plate is installed above the two support plates (101); The guide rod (5) and the cylindrical cam (6) are mounted on a fixed plate; The rod body of the cylindrical cam (6) is provided with a right-handed cam groove (601) and a left-handed cam groove (602) whose starting points and end points coincide with each other; One end of the cylindrical cam (6) passes through the fixed plate and is connected to the large gear (7); The large gear (7) and the small gear (10) are located on the same side of the support frame (1); The large gear (7) and the small gear (10) are externally equipped with a synchronous belt (9); The guide rod (5) is located above the cylindrical cam (6); The guide rod (5) and the cylindrical cam (6) are equipped with a winding assembly (4); The winding assembly (4) has a cable hole (405); Under the positioning action of the guide rod (5), the winding assembly (4) performs reciprocating linear motion along the length direction of the guide rod (5) as the cylindrical cam (6) rotates, so that the cable passing through the cable hole (405) is wound around the outer side wall of the rotating winding drum (2).

2. The reciprocating wire-retracting and -releasing device realized by a cylindrical cam according to claim 1, characterized in that: The axes of the winding drum (2), the guide rod (5) and the cylindrical (6) cam are parallel.

3. The reciprocating wire-retracting and -releasing device realized by a cylindrical cam according to claim 1, characterized in that: The joint surface where the starting point and the end point of the right-handed cam groove (601) and the left-handed cam groove (602) coincide with each other is transitioned through an arc to form a transition arc (603) at the intersection of the two cam grooves.

4. The reciprocating wire-retracting and -releasing device realized by a cylindrical cam according to claim 1, characterized in that: The lead of the right-handed cam groove (601) and the left-handed cam groove (602) is equal to 2 to 2.5 times the diameter of the cable.

5. The reciprocating wire-retracting and -releasing device realized by a cylindrical cam according to claim 1, characterized in that: The winding assembly (4) comprises a cam follower (401) and a sliding block (403); The sliding block (403) is provided with a hole I and a hole II, and the axis of the hole I is orthogonal to the axis of the hole II; The shaft of the cylindrical cam (6) passes through the hole I; The cam follower (401) is located in hole II, has a clearance fit with hole II, and can rotate in hole II; The cam follower (401) comprises a cylindrical body (4011) at an upper end and a crescent portion (4012) at a lower end; The crescent portion (4012) extends into the hole I and matches with the right-handed cam groove (601) or the left-handed cam groove (602) on the cylindrical cam (6). When the cylindrical cam (6) rotates, the cam follower (401) moves in the cam groove. When it moves to the point where the starting points or end points of the two cam grooves overlap, the cam follower (401) automatically rotates and switches to the other cam groove, and moves in the opposite direction in the other cam groove.

6. The reciprocating wire-retracting and -releasing device realized by a cylindrical cam according to claim 5, characterized in that: The winding assembly (4) further comprises a limiting cover (402) and a wire pressing block (404); A limit cover (402) is provided above the sliding block (403) and the cam follower (401) to limit the up and down movement of the cam follower (401); The lower end of the sliding block (403) and the wire pressing block (404) are both provided with semicircular grooves; the wire pressing block (404) is fixed to the sliding block (403) by means of a fastening screw (406) so that the semicircular grooves provided on the two are aligned to form a cylindrical cable hole (405).

7. The reciprocating wire-retracting and -releasing device realized by a cylindrical cam according to claim 5, characterized in that: The diameter of the cylindrical body of the cam follower (401) is equal to the diameter of the cylindrical cam (6), so that the length of the crescent of the crescent portion (4012) is more than twice the width of the gap, and the width of the gap is the width of the gap generated at the intersection of the two cam grooves.

8. The reciprocating wire-retracting and -releasing device realized by a cylindrical cam according to claim 1, characterized in that: The gear ratio between the large gear (7) and the small gear (10) is 2 to 2.

5.

9. The reciprocating wire-retracting and -releasing device realized by a cylindrical cam according to claim 1, characterized in that: When the cable is reeled in, the motor (3) works and drives the cable reel (2) to rotate, and the cable is automatically wound around the cable reel (2); At the same time, the rotation of the winding drum (2) drives the small gear (10), the large gear (7) and the cylindrical cam (6) to rotate. The winding assembly (4) moves linearly under the rotation of the cylindrical cam (6) to wind the cable regularly and neatly on the winding drum (2). When the winding drum (2) is fully covered with a layer of cable, the winding assembly (4) will automatically reverse direction and move in the reverse direction to wind a second layer of cable on the winding drum (2). This process is repeated until all the cables are collected.

10. A reciprocating wire-reeling and retracting device realized by a cylindrical cam, characterized in that: The invention comprises a support frame (1), a winding drum (2), a winding assembly (4), a guide rod (5), a cylindrical cam (6), a large gear (7), a hand crank (8), a synchronous belt (9) and a small gear (10). The support frame (1) comprises two support plates (101) with through holes; A cavity is sandwiched between the two support plates (101); The winding drum (2) is located in the cavity, and one end of the winding drum is connected to the pinion gear (10); A fixing plate is installed above the two support plates (101); The guide rod (5) and the cylindrical cam (6) are mounted on a fixed plate; One end of the cylindrical cam (6) passes through a fixed plate and is connected to a large gear (7) equipped with a hand crank (8); The large gear (7) and the small gear (10) are located on the same side of the support frame (1); The large gear (7) and the small gear (10) are externally equipped with a synchronous belt (9); The guide rod (5) is located above the cylindrical cam (6); The guide rod (5) and the cylindrical cam (6) are equipped with a winding assembly (4); The winding assembly (4) is provided with a cable hole (405); Under the positioning action of the guide rod (5), the winding assembly (4) performs reciprocating linear motion along the length direction of the guide rod (5) as the cylindrical cam (6) rotates, so that the cable passing through the cable hole (405) is wound around the outer side wall of the rotating winding drum (3).

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