Variable-pitch structure and device

Abstract

The utility model discloses a variable pitch structure and device, and relates to the technical field of winding mechanisms. According to the main technical scheme, the device comprises a rotating head, a reel, a swing block and a floating shaft assembly, wherein a pin hole is formed in one end of the rotating head; the reel is arranged at one end of the rotating head; the swinging block is rotationally connected to one end of the rotating head; the floating shaft assembly comprises a floating shaft and a pin shaft, the floating shaft is arranged on the swing block, and the floating shaft and the reel are arranged in parallel; the pin shaft is arranged on the swinging block; when the pin shaft is in a state of being inserted into the pin hole, the floating shaft is located at a target position; when the pin shaft is not inserted into the pin hole, the floating shaft can rotate around the rotating axis of the swing block from the target position to the direction close to the reel. The pressure between the water hose and the reel is reduced, so that the aim of conveniently taking off the coiled belt-shaped objects such as the cloth belt and the water hose from the reel is fulfilled.

Description

TECHNICAL FIELD

[0001] The utility model relates to a winding mechanism technical field, concretely relates to a variable distance structure and device. BACKGROUND

[0002] The existing winding machine drags the water belt when winding the water belt, so that the water belt is tightly pressed on the winding shaft under the friction resistance between the water belt and the ground. With the rotation of the winding shaft, the water belt is layered, and the pressure between the water belt and the winding shaft gradually increases, finally making it difficult for the wound water belt to separate from the winding shaft. SUMMARY

[0003] The utility model discloses a variable distance structure and device, which solves the problem that the existing winding shaft is difficult to separate the water belt from the winding shaft after winding the water belt.

[0004] To solve the above technical problems, the utility model adopts the following technical scheme:

[0005] In one aspect, a variable distance structure is provided, including a rotating head, a winding shaft, a swing block and a floating shaft assembly. One end of the rotating head is provided with a pin hole. The winding shaft is arranged at one end of the rotating head. The swing block is rotationally connected to one end of the rotating head. The floating shaft assembly includes a floating shaft and a pin shaft. The floating shaft is arranged on the swing block, and the floating shaft and the winding shaft are arranged side by side. The pin shaft is arranged on the swing block. When the pin shaft is inserted into the pin hole, the floating shaft is located at the target position. When the pin shaft is not inserted into the pin hole, the floating shaft can rotate around the rotation axis of the swing block from the target position to the direction close to the winding shaft.

[0006] Further, the pin shaft is arranged in the floating shaft. The floating shaft assembly further includes a driving member. The driving member is arranged at one end of the pin shaft away from the pin hole. The driving member is used to drive the pin shaft to move relative to the floating shaft towards or away from the pin hole.

[0007] Further, the driving member comprises an elastic unit and a trigger; the elastic unit is arranged on the floating shaft, the elastic unit is sleeved on the pin shaft, and the two ends of the elastic unit are respectively abutted against the floating shaft and the pin shaft; the trigger is rotationally connected to the side wall of the pin shaft, and the trigger is abutted against the end face of the floating shaft; the trigger is used for rotating from a first position to a second position, so as to drive the pin shaft to move relative to the floating shaft in a direction away from the pin hole; the trigger is used for rotating from the second position to the first position, so as to drive the pin shaft to move relative to the floating shaft in a direction close to the pin hole; wherein, when the trigger is in the first position, the trigger extends along the radial direction of the pin shaft; when the trigger is in the second position, the trigger extends along the axial direction of the pin shaft.

[0008] Further, the driving member further comprises a protective sleeve; the protective sleeve is arranged on one end of the floating shaft close to the trigger, and the pin shaft is arranged in the protective sleeve at one end close to the trigger; a limiting groove is formed in the pin shaft; the limiting groove extends from the end face of the pin shaft close to the trigger to the end of the pin shaft away from the trigger; wherein, the two ends of the elastic unit are respectively abutted against the groove bottom of the limiting groove and the protective sleeve.

[0009] Further, the distance from the end face of one end of the trigger to the rotationally connected position between the trigger and the pin shaft is recorded as a first distance; the distance from the side wall of the trigger to the rotationally connected position between the trigger and the pin shaft is recorded as a second distance; wherein, the first distance is greater than the second distance, and when the trigger is in the first position, the side wall of the trigger is abutted against the floating shaft; when the trigger is in the second position, the end face of one end of the trigger is abutted against the floating shaft.

[0010] Further, the distance from the end face of the other end of the trigger to the rotationally connected position between the trigger and the pin shaft is recorded as a third distance; wherein, the third distance is greater than the first distance.

[0011] Further, an arc-shaped part is arranged between the end face of one end of the trigger and the side wall of the trigger; the arc-shaped part is curved towards the side close to the floating shaft, and the arc-shaped part is used for abutting against the floating shaft.

[0012] In the second aspect, a variable distance device is provided, comprising the variable distance structure as described in the first aspect, and further comprising a rotating member, the output end of the rotating member is connected to the other end of the rotating head, and the rotating direction of the rotating member is perpendicular to the extending direction of the reel.

[0013] Compared with the prior art, the utility model has the advantages of:

[0014] When the belt is wound up, the pin shaft is disengaged from the pin hole. At this time, the floating shaft is driven by the pressure of the belt winding to move the swing block around the rotation axis of the swing block from the target position to the direction close to the reel, thereby reducing the distance between the floating shaft and the reel. The purpose is to reduce the pressure between the hose and the reel, so as to facilitate the removal of the wound belt, hose and other belt-shaped objects from the reel. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is an exploded structural schematic diagram of a variable distance structure in the embodiment;

[0016] Figure 2 It is a structural schematic diagram of the floating shaft assembly when the trigger of the variable distance structure is in the first position;

[0017] Figure 3 It is a structural schematic diagram of the variable distance structure in the embodiment; Figure 2 It is a sectional view of A-A in the embodiment;

[0018] Figure 4 It is a structural schematic diagram of the floating shaft assembly when the trigger of the variable distance structure is in the second position;

[0019] Figure 5 It is a sectional view of B-B in the embodiment; Figure 4

[0020] It is a structural schematic diagram of the trigger of the variable distance structure in the embodiment; Figure 6

[0021] It is a structural schematic diagram of the variable distance device in the embodiment; Figure 7

[0022] It is an exploded structural schematic diagram of the variable distance device in the embodiment. Figure 8 Markings in the drawings and corresponding component names:

[0023] 1-rotating head; 2-pin hole; 3-reel; 4-swing block; 5-floating shaft; 6-pin shaft; 7-elastic unit; 8-trigger; 9-protective sleeve; 10-limiting groove; 11-arc-shaped part; 12-motor; 13-motor mounting plate; 14-mounting bracket; 15-reducer; 16-pressing cover.

[0024] DETAILED DESCRIPTION

[0025] The utility model will be further described below in combination with the drawings.

[0026] Embodiment 1

[0027] The embodiment provides a variable distance structure, which comprises a reel, a rotating head, a swing block, a floating shaft, a pin shaft, an elastic unit and a trigger. Figures 1-6 ​As shown, the variable-pitch structure comprises a rotating head 1, a reel 3, a swing block 4 and a floating shaft assembly. The rotating head 1 has a pin hole 2 at one end thereof. The reel 3 is arranged at one end of the rotating head 1. The swing block 4 is rotatably connected to one end of the rotating head 1. The floating shaft assembly comprises a floating shaft 5 and a pin shaft 6. The floating shaft 5 is arranged on the swing block 4 and is arranged in parallel with the reel 3. The pin shaft 6 is arranged on the swing block 4. When the pin shaft 6 is inserted into the pin hole 2, the floating shaft 5 is located at a target position. When the pin shaft 6 is not inserted into the pin hole 2, the floating shaft 5 can rotate around the rotation axis of the swing block 4 from the target position to the direction close to the reel 3.

[0028] For example, in the implementation process, the variable-pitch structure comprises a rotating head 1, a reel 3, a swing block 4 and a floating shaft assembly.

[0029] The end surface of one end of the rotating head 1 is provided with a pin hole 2.

[0030] The reel 3 is connected to the end surface of one end of the rotating head 1 by welding, screwing or one-piece forming, and the reel 3 extends along the direction from the other end of the rotating head 1 to one end of the rotating head 1.

[0031] The swing block 4 is rotatably connected to the end surface of one end of the rotating head 1 by shaft hole cooperation or bearing cooperation. For example, in an optional embodiment, a hole groove is formed in the end surface of one end of the rotating head 1, and a rotating shaft is arranged on the end surface of one end of the rotating head 1 by welding, screwing or one-piece forming, and the rotating shaft is rotatably connected to the hole groove in the rotating head 1 by shaft hole cooperation or bearing, so as to achieve the purpose of rotatably connecting the swing block 4 to the end surface of one end of the rotating head 1. In another optional embodiment, a rotating shaft is connected to the end surface of one end of the rotating head 1 by welding, screwing, shaft hole interference connection or one-piece forming, and the swing block 4 is sleeved on the rotating shaft, and a rotation gap exists between the swing block 4 and the rotating shaft, so as to achieve the purpose of rotatably connecting the swing block 4 to the end surface of one end of the rotating head 1.

[0032] The floating shaft assembly comprises a floating shaft 5 and a pin shaft 6. The floating shaft 5 is connected to the swing block 4 by welding, screwing or one-piece forming, so that the floating shaft 5 can rotate synchronously with the swing block 4. The floating shaft 5 is arranged in parallel with the reel 3, that is, the floating shaft 5 extends along the direction from the other end of the rotating head 1 to one end of the rotating head 1. The pin shaft 6 is arranged on the swing block 4, and the pin shaft 6 can be inserted into the pin hole 2.

[0033] In use, the rotating head 1 is installed on a winding machine. When it is necessary to wind a belt-shaped object such as a water hose or a cloth belt, the swing block 4 is first rotated, and the floating shaft 5 and the pin shaft 6 are rotated synchronously with the swing block 4. When the pin shaft 6 is rotated to a position corresponding to the pin hole 2, the pin shaft 6 is inserted into the pin hole 2. At this time, the floating shaft 5 is located at a target position and is spaced apart from the winding shaft 3. Then, the winding machine is operated, and the belt-shaped object is wound on the winding shaft 3 with the whole formed by the winding shaft 3 and the floating shaft 5 as a winding shaft. When the winding of the belt-shaped object is completed, the pin shaft 6 is separated from the pin hole 2. At this time, the floating shaft 5 is moved from the target position to a position close to the winding shaft 3 under the pressure of the winding of the belt-shaped object, and the swing block 4 is rotated about the rotation axis of the swing block 4, thereby reducing the distance between the floating shaft 5 and the winding shaft 3. The purpose is to reduce the pressure between the water hose and the winding shaft 3, so as to facilitate the removal of the wound cloth belt, water hose or other belt-shaped object from the winding shaft 3.

[0034] In the embodiment, as shown in Figure 1 the pin shaft 6 is arranged in the floating shaft 5; the floating shaft assembly further comprises a driving member; the driving member is arranged at one end of the pin shaft 6 away from the pin hole 2; and the driving member is used to drive the pin shaft 6 to move relative to the floating shaft 5 towards or away from the pin hole 2.

[0035] For example, in the implementation process, the floating shaft 5 is a tubular structure with an inner cavity, and the pin shaft 6 is arranged in the inner cavity of the floating shaft 5, so that the pin shaft 6 can move along the axial direction of the floating shaft 5.

[0036] The floating shaft assembly further comprises a driving member, which can be a pull ring, a telescopic motor 12, a pneumatic cylinder or other driving mechanism. The driving member is connected to one end of the pin shaft 6 away from the pin hole 2, and the driving member is used to drive the pin shaft 6 to move relative to the floating shaft 5 towards or away from the pin hole 2.

[0037] In use, when the pin shaft 6 is rotated to a position corresponding to the pin hole 2, the driving member is used to drive the pin shaft 6 to move relative to the floating shaft 5 towards the pin hole 2 until the pin shaft 6 is inserted into the pin hole 2. When the winding of the belt-shaped object is completed, the driving member is used to drive the pin shaft 6 to move relative to the floating shaft 5 away from the pin hole 2 until the pin shaft 6 is separated from the pin hole 2. The purpose is to facilitate the insertion of the pin shaft 6 into the pin hole 2 by the driving member, and the separation of the pin shaft 6 and the pin hole 2 from the floating shaft 5 away from the end of the rotating head after the winding of the belt-shaped object is completed.

[0038] In the embodiment, as shown in Figure 3 and Figure 5As shown, the driving member comprises an elastic unit 7 and a trigger 8; the elastic unit 7 is arranged in the floating shaft 5, the elastic unit 7 is sleeved on the pin shaft 6, and the two ends of the elastic unit 7 are respectively abutted against the floating shaft 5 and the pin shaft 6; the trigger 8 is rotationally connected to the side wall of the pin shaft 6, and the trigger 8 is abutted against the end face of the floating shaft 5; the trigger 8 is used to rotate from a first position to a second position, so as to drive the pin shaft 6 to move relative to the floating shaft 5 in a direction away from the pin hole 2; the trigger 8 is used to rotate from the second position to the first position, so as to drive the pin shaft 6 to move relative to the floating shaft 5 in a direction close to the pin hole 2; wherein, when the trigger 8 is in the first position, the trigger 8 extends along the radial direction of the pin shaft 6; when the trigger 8 is in the second position, the trigger 8 extends along the axial direction of the pin shaft 6.

[0039] For example, in the implementation process, the above-mentioned driving member comprises an elastic unit 7 and a trigger 8.

[0040] The elastic unit 7 can adopt a structure of a spring, rubber, etc. The elastic unit 7 is arranged in the interior of the floating shaft 5, and one end of the elastic unit 7 is connected to the inner wall of the floating shaft 5 by welding, clamping groove abutment, etc. The pin shaft 6 is arranged in the elastic unit 7, and the other end of the elastic unit 7 is connected to the outer wall of the pin shaft 6 by welding, clamping groove abutment, etc.

[0041] The trigger 8 is rotationally connected to the side wall of the pin shaft 6. For example, a rotating shaft is connected to the side wall of the pin shaft 6 by welding, screwing, etc., and an axle hole is formed in the trigger 8. The rotating shaft on the side wall of the pin shaft 6 is inserted into the axle hole of the trigger 8 and is rotationally connected to the axle hole of the trigger 8 by cooperation, bearing cooperation, etc. Thus, the trigger 8 is rotationally connected to the side wall of the pin shaft 6. Moreover, the trigger 8 is abutted against the end face of the floating shaft 5 under the elastic force of the elastic unit 7.

[0042] When the trigger 8 is rotated to extend along the radial direction of the floating shaft 5, the trigger 8 is in the first position. When the trigger 8 is rotated to extend along the axial direction of the floating shaft 5, the trigger 8 is in the second position.

[0043] The trigger 8 can be rotated from the first position to the second position / from the second position to the first position. When the trigger 8 is rotated from the first position to the second position, the pin shaft 6 moves relative to the floating shaft 5 in a direction away from the pin hole 2, and the elastic unit 7 is compressed. Moreover, when the trigger 8 is rotated to the second position, the pin shaft 6 is separated from the pin hole 2. When the trigger 8 is rotated from the second position to the first position, the elastic unit 7 is stretched, and under the elastic force of the elastic unit 7, the pin shaft 6 moves relative to the floating shaft 5 in a direction close to the pin hole 2. Moreover, when the trigger 8 is rotated to the first position, the pin shaft 6 can be inserted into the pin hole 2.

[0044] During use, when pin 6 rotates to correspond with the pin hole 2, the trigger 8 is rotated from the second position to the first position to extend the elastic unit 7. At this time, under the action of the elastic unit 7, pin 6 moves relative to the floating shaft 5 towards the pin hole 2 until the trigger 8 is rotated to the first position, at which point pin 6 is inserted into the pin hole 2. After the strip is wound, the trigger 8 is rotated from the first position to the second position, and pin 6 moves relative to the floating shaft 5 away from the pin hole 2. The elastic unit 7 is compressed until the trigger 8 is rotated to the second position, at which point pin 6 separates from the pin hole 2. This is intended to simplify the drive mechanism and allow pin 6 to be inserted into the pin hole 2 under the influence of the elastic unit 7.

[0045] In this embodiment, as Figure 3 or Figure 5 As shown, the driving component also includes a protective sleeve 9; the protective sleeve 9 passes through the end of the floating shaft 5 near the trigger 8, and the end of the pin 6 near the trigger 8 passes through the protective sleeve 9; a limiting groove 10 is formed on the pin 6; the limiting groove 10 extends from the end of the pin 6 near the trigger 8 to the end of the pin 6 away from the trigger 8; wherein, the two ends of the elastic unit 7 respectively abut against the bottom of the limiting groove 10 and the protective sleeve 9.

[0046] For example, in implementation, the aforementioned drive component also includes a protective sleeve 9. The outer wall of the protective sleeve 9 is provided with external threads, and the end of the floating shaft 5 near the trigger 8 is provided with internal threads. The protective sleeve 9 is screwed onto the internal threads of the floating shaft 5 near the trigger 8 via the external threads.

[0047] A limiting groove 10 is provided at the end of the pin 6 near the trigger 8. The limiting groove 10 extends from the end of the pin 6 near the trigger 8 to the end of the pin 6 away from the trigger 8. The end of the pin 6 near the trigger 8 passes through the protective sleeve 9.

[0048] The elastic unit 7 is sleeved on the end of the pin 6 near the trigger 8, and the two ends of the elastic unit 7 respectively abut against the groove wall of the limiting groove 10 and the end face of the protective sleeve 9 away from the trigger 8.

[0049] In use, the protective sleeve 9 is first connected in the floating shaft 5, and the elastic unit 7 is placed in the floating shaft 5. Secondly, the pin shaft 6 is arranged at one end of the limiting groove 10, and is inserted into the floating shaft 5 from the end of the floating shaft 5 away from the protective sleeve 9. With the insertion of the pin shaft 6, the groove wall of the limiting groove 10 gradually abuts against the end of the elastic unit 7 away from the protective sleeve 9, and pushes the elastic unit 7 to move towards the protective sleeve 9. When the elastic unit 7 contacts the protective sleeve 9, the elastic unit 7 is gradually compressed until the end of the pin shaft 6 arranged with the limiting groove 10 is inserted out of the floating shaft 5. Then, the trigger 8 is rotationally connected at the end of the pin shaft 6 arranged with the limiting groove 10. After the trigger 8 is connected, the elastic force of the elastic unit 7 drives the pin shaft 6 to move relative to the floating shaft 5 in a direction away from the protective sleeve 9 until the trigger 8 abuts against the end surface of the floating shaft 5. The purpose is to ensure that the elastic unit 7 is stably connected between the floating shaft 5 and the pin shaft 6, thereby reducing the risk of displacement or falling of the elastic unit 7 in use, and enhancing the stability of the system.

[0050] In this embodiment, as shown in Figure 6 the distance from the end surface of one end of the trigger 8 to the position of the rotational connection between the trigger 8 and the pin shaft 6 is recorded as the first distance, and the distance from the side wall of the trigger 8 to the position of the rotational connection between the trigger 8 and the pin shaft 6 is recorded as the second distance. The first distance is greater than the second distance, and when the trigger 8 is in the first position, the side wall of the trigger 8 abuts against the floating shaft 5. When the trigger 8 is in the second position, the end surface of one end of the trigger 8 abuts against the floating shaft 5.

[0051] For example, in the implementation process, the distance from the end surface of one end of the trigger 8 to the position of the rotational connection between the trigger 8 and the pin shaft 6 is recorded as the first distance P, and the distance from the side wall of the trigger 8 to the position of the rotational connection between the trigger 8 and the pin shaft 6 is recorded as the second distance C. The first distance P is greater than the second distance C. When the trigger 8 is in the first position, the side wall of the trigger 8 abuts against the end surface of the floating shaft 5. When the trigger 8 is in the second position, the end surface of one end of the trigger 8 abuts against the end surface of the floating shaft 5. In this way, when the trigger 8 is rotated from the first position to the second position, the pin shaft 6 is separated from the pin hole 2, and when the trigger 8 is rotated from the second position to the first position, the pin shaft 6 can be inserted into the pin hole 2.

[0052] In this embodiment, as shown in Figure 6 the distance from the end surface of the other end of the trigger 8 to the position of the rotational connection between the trigger 8 and the pin shaft 6 is recorded as the third distance. The third distance is greater than the first distance.

[0053] Exemplarily, in the implementation process, the distance from the end face of the other end of the trigger 8 to the position where the trigger 8 is rotationally connected with the pin shaft 6 is recorded as a third distance L. The third distance L is greater than the first distance P, so as to facilitate the staff to apply force to the other end of the trigger 8 to rotate the trigger 8.

[0054] In the embodiment, as shown in the figure, Figure 3 the end face of one end of the trigger 8 is provided with an arc-shaped part 11 relative to the side wall of the trigger 8; the arc-shaped part 11 is curved towards the side close to the floating shaft 5, and the arc-shaped part 11 is used to abut against the floating shaft 5.

[0055] Exemplarily, in the implementation process, the arc-shaped part 11 is arranged between the end face of one end of the trigger 8 and the side wall of the trigger 8, and the arc-shaped part 11 is curved towards the side close to the floating shaft 5. When the trigger 8 rotates from the first position to the second position or from the second position to the first position, the arc-shaped part 11 abuts against the floating shaft 5. This is expected to reduce the resistance during the rotation of the trigger 8, thereby facilitating the staff to rotate the trigger 8.

[0056] In a preferred embodiment, the end face of one end of the rotating head 1 is provided with a mounting groove, the pin hole 2 is arranged at the groove bottom of the mounting groove, and the swing block 4 is rotationally connected to the groove bottom of the mounting groove. The variable distance structure further comprises a gland 16. The gland 16 is arranged through the reel 3 and the floating shaft 5, and the gland 16 is used to be connected to the groove opening of the mounting groove. This is expected to reduce the risk of the swing block 4 and other mechanisms falling out of the mounting groove.

[0057] A sliding groove is arranged on the gland 16, and the sliding groove matches the movement track of the floating shaft 5 when the floating shaft 5 moves from the target position to the reel 3. This is expected to reduce the risk of the gland 16 causing the floating shaft 5 to move harshly, and to guide the movement direction of the floating shaft 5.

[0058] Embodiment 2

[0059] The embodiment provides a variable distance device, as shown in the figure, Figures 7-8 which comprises the variable distance structure as described in Embodiment 1, and further comprises a rotating member. The output end of the rotating member is connected with the other end of the rotating head 1, and the rotating direction of the rotating member is perpendicular to the extension direction of the reel 3.

[0060] Exemplarily, in the implementation process, the variable distance device comprises the variable distance structure and the rotating member. The rotating member is used to be installed on a winding machine, the variable distance structure is arranged on the rotating member, and the extension direction of the reel 3 is perpendicular to the rotating direction of the rotating member. This is expected to achieve the purpose of winding the belt-shaped object on the floating shaft 5 and the reel 3 during the rotation of the rotating member.

[0061] In one optional embodiment, the rotating component includes a motor 12, which is connected to the winding machine by means of screwing, snap-fitting, or other methods. The output shaft of the motor 12 is connected to the end of the rotating head 1 away from the reel 3. This is to achieve the purpose of driving the rotating head 1 to rotate when the motor 12 is working, thereby winding the strip onto the floating shaft 5 and the reel 3.

[0062] In another optional embodiment, the rotating component includes a motor 12, a motor 12 mounting plate, a mounting bracket 14, and a reducer 15. The mounting bracket 14 is mounted on the winding machine by welding, screwing, or other methods. The reducer 15 passes through the mounting bracket 14, with one end connected to the end of the rotating head 1 away from the winding shaft 3. The motor 12 is connected to the motor 12 mounting plate by screwing, snapping, or other methods, and the output shaft of the motor 12 is connected to the end of the reducer 15 away from the rotating head 1. The motor 12 mounting plate is connected to the mounting bracket 14 by studs. This arrangement allows the motor 12 to drive the reducer 15 to rotate when it is operating, thereby driving the rotating head 1 to rotate, thus winding the strip material onto the floating shaft 5 and the winding shaft 3.

[0063] Although the present invention has been described herein with reference to several illustrative embodiments, it should be understood that many other modifications and implementations can be devised by those skilled in the art, which will fall within the scope and spirit of the principles disclosed herein. More specifically, various variations and modifications can be made to the components and / or layout of the subject matter combination within the scope of the disclosure, drawings, and claims. Besides variations and modifications to the components and / or layout, other uses will be apparent to those skilled in the art.

Claims

1. A variable pitch structure, characterized by, The variable distance structure comprises: a rotating head (1) having a pin hole (2) at one end thereof; a reel (3) arranged at one end of the rotating head (1); a swing block (4) rotationally connected to one end of the rotating head (1); a floating shaft assembly comprising a floating shaft (5) and a pin shaft (6), the floating shaft (5) being arranged on the swing block (4) and being arranged in parallel with the reel (3), and the pin shaft (6) being arranged on the swing block (4); wherein, when the pin shaft (6) is inserted into the pin hole (2), the floating shaft (5) is located at a target position, and when the pin shaft (6) is not inserted into the pin hole (2), the floating shaft (5) can rotate around the rotation axis of the swing block (4) from the target position to the direction close to the reel (3).

2. The variable distance structure according to claim 1, wherein: the pin shaft (6) is arranged in the floating shaft (5); the floating shaft assembly further comprises a driving member; the driving member is arranged at one end of the pin shaft (6) away from the pin hole (2); the driving member is used to drive the pin shaft (6) to move relative to the floating shaft (5) to the direction close to or away from the pin hole (2).

3. The variable distance structure according to claim 2, wherein: the driving member comprises an elastic unit (7) and a trigger (8); the elastic unit (7) is arranged in the floating shaft (5), the elastic unit (7) is sleeved on the pin shaft (6), and the two ends of the elastic unit (7) are respectively abutted against the floating shaft (5) and the pin shaft (6); the trigger (8) is rotationally connected to the side wall of the pin shaft (6), and the trigger (8) is abutted against the end face of the floating shaft (5); the trigger (8) is used to rotate from a first position to a second position to drive the pin shaft (6) to move relative to the floating shaft (5) to the direction away from the pin hole (2); the trigger (8) is used to rotate from the second position to the first position to drive the pin shaft (6) to move relative to the floating shaft (5) to the direction close to the pin hole (2); wherein, when the trigger (8) is in the first position, the trigger (8) extends along the radial direction of the pin shaft (6), and when the trigger (8) is in the second position, the trigger (8) extends along the axial direction of the pin shaft (6).

4. The variable distance structure according to claim 3, wherein: the driving member further comprises a protective sleeve (9); the protective sleeve (9) is arranged at one end of the floating shaft (5) close to the trigger (8), and one end of the pin shaft (6) close to the trigger (8) is arranged in the protective sleeve (9); a limiting groove (10) is arranged on the pin shaft (6); the limiting groove (10) extends from the end face of the pin shaft (6) close to the trigger (8) to the end of the pin shaft (6) away from the trigger (8). Two ends of the elastic unit (7) respectively abut against the groove bottom of the limiting groove (10) and the protective sleeve (9).

5. The variable distance structure according to claim 3, characterized in that: The distance from the end face of one end of the trigger (8) to the position where the trigger (8) and the pin shaft (6) are rotationally connected is recorded as a first distance. The distance from the side wall of the trigger (8) to the position where the trigger (8) and the pin shaft (6) are rotationally connected is recorded as a second distance. The first distance is greater than the second distance, and when the trigger (8) is in the first position, the side wall of the trigger (8) abuts against the floating shaft (5); when the trigger (8) is in the second position, the end face of one end of the trigger (8) abuts against the floating shaft (5).

6. The variable distance structure according to claim 5, characterized in that: The distance from the end face of the other end of the trigger (8) to the position where the trigger (8) and the pin shaft (6) are rotationally connected is recorded as a third distance. The third distance is greater than the first distance.

7. The variable distance structure according to claim 5, characterized in that: An arc-shaped part (11) is arranged between the end face of one end of the trigger (8) and the side wall of the trigger (8). The arc-shaped part (11) is curved towards the side close to the floating shaft (5), and the arc-shaped part (11) is used to abut against the floating shaft (5).

8. A variable pitch device characterized by, The variable distance device comprises the variable distance structure according to any one of claims 1-7, and further comprises: A rotating member, the output end of the rotating member is connected with the other end of the rotating head (1), and the rotating direction of the rotating member is perpendicular to the extension direction of the reel (3).

Images