Inner clamping disc brake device and take-up and pay-off wheel

Abstract

The utility model discloses an inner clamping disc brake device which comprises a shaft sleeve, a rotating shaft, a second brake disc and a disc brake disc, the shaft sleeve is fixedly connected with a wheel body of a take-up and pay-off wheel and rotates along with the wheel body, and a first brake disc is fixedly installed or integrally formed on the end face of one side of the shaft sleeve; the rotating shaft is rotationally installed in the shaft sleeve through a bearing, the two ends of the rotating shaft extend out of the shaft sleeve, one end of the rotating shaft is provided with an anti-reversing mechanism, and the other end of the rotating shaft is provided with a force application mechanism. The second brake disc rotationally sleeves the rotating shaft, a limiting reset mechanism is arranged between the first brake disc and the second brake disc, and under the action of the limiting reset mechanism, the first brake disc and the second brake disc synchronously rotate and get close to and get away from each other in the axial direction; the disc brake disc is sleeved on the rotating shaft and rotates along with the rotating shaft. According to the utility model, double-sided friction is realized, the number of spare and accessory parts is reduced, the processing and assembling cost is reduced, and the size miniaturization of the shaft sleeve is facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to a take-up reel technical field especially relates to a kind of inner clamping disc brake device and take-up reel. BACKGROUND

[0002] Take-up reel is a kind of tool needed in fishing, kite flying. Take-up reel generally includes the support and winding reel disc relatively rotating, winding reel disc is wound with fishing line, kite line, realizes the take-up of lifting hook, kite by the rotation of winding reel disc. Inventor has been committed to the research and production and sales of kite reel for many years, and has made many structural improvements on kite reel. In the utility model with patent No. CN201720450321.0, the utility model discloses a kite reel, which comprises a kite reel spindle, a line reel connected with the kite reel spindle in rotation, a friction pressing plate for synchronously rotating the line reel with the kite reel spindle by pressing the line reel, and a reset member for enabling the friction pressing plate to make reciprocating motion and a brake wrench for driving the friction pressing plate to contact with the line reel. Correspondingly, the line reel is provided with a containing groove for accommodating the reset member, and the friction pressing plate is arranged on the side corresponding to the containing groove. The kite reel further comprises an anti-reversing mechanism for preventing the line reel from reversing when the line is being taken out.

[0003] The inventor found in actual production that the structure only presses the friction pressing plate on one side, especially in large kite reel, the brake effect is not good enough. There is another technology that more than two pressing plates, two friction plates and clamping plates are installed in the shaft sleeve, and the clamping plate is limited in the circumferential direction between the shaft sleeve. However, this structure makes the spare parts complicated, increases the processing and assembly cost, and makes the shaft sleeve unable to be miniaturized.

[0004] Therefore, to develop a new kind of inner clamping disc brake device and take-up reel not only has urgent research value, but also has good economic benefits and industrial application potential, which is the driving force and basis for the completion of the utility model. SUMMARY

[0005] In order to overcome the defects of the prior art pointed out above, the present inventors have made in-depth research, and after a lot of creative labor, the utility model is completed.

[0006] Specifically, the technical problem to be solved by the utility model is to provide an inner clamping disc brake device and take-up reel to improve the effect of brake braking.

[0007] To solve the above technical problems, the technical scheme of the utility model is:

[0008] An inner clamping disc brake device, comprising

[0009] A shaft sleeve is fixedly connected with a wheel body of a take-up reel and rotates with the wheel body, and a first brake disc is fixedly installed or integrally formed on one side end face of the shaft sleeve;

[0010] A rotating shaft is rotatably installed in the shaft sleeve by bearings, and extends out of the shaft sleeve at both ends, one end of the rotating shaft is provided with an anti-reverse mechanism, the other end is provided with a force applying mechanism, and a rotation preventing surface is arranged on the surface of the rotating shaft;

[0011] A second brake disc is rotatably sleeved on the rotating shaft, a limiting reset mechanism is arranged between the first brake disc and the second brake disc, the first brake disc and the second brake disc rotate synchronously under the action of the limiting reset mechanism, and are close to or away from each other in the axial direction;

[0012] A disc brake is sleeved on the rotating shaft and is between the first brake disc and the second brake disc, and the disc brake has a rotation preventing through hole matched with the rotation preventing surface, so that the disc brake rotates with the rotating shaft.

[0013] As an improvement, a gear shifting shell is arranged on the rotating shaft, and both ends of the gear shifting shell are rotatably connected with the rotating shaft by bearings, and a gear shifting device is installed in the gear shifting shell.

[0014] In the utility model, when the force applying mechanism does not apply pressure, the first brake disc and the second brake disc are away from each other under the action of the limiting reset mechanism, and there is a space between the two for the disc brake to rotate freely, at this time, the relationship between the rotating shaft and the shaft sleeve is a bearing connection (under the premise of not considering the anti-reverse mechanism), the shaft sleeve and the wheel body can rotate around the rotating shaft without obstruction, and the take-up reel is in a free take-up state;

[0015] When the force applying mechanism applies pressure, the limiting reset mechanism is compressed, the first brake disc and the second brake disc are close to each other under the action of the force applying mechanism, and are clamped and abutted on both sides of the disc brake, forming a brake effect, which is equivalent to the first brake disc, the second brake disc and the disc brake forming a whole rotating body, since the disc brake is always rotating with the rotating shaft, therefore, in this state, the shaft sleeve and the wheel body rotate with the rotating shaft.

[0016] As an improvement, the opposite surfaces of the first brake disc and the second brake disc are fixedly connected or integrally formed with friction materials.

[0017] As an improvement, the first brake disc and the second brake disc are both provided with heat dissipation holes.

[0018] As an improvement, the rotating shaft is mounted on the shaft sleeve by at least two bearings to ensure the stability of the rotating shaft.

[0019] As an improvement, the limiting reset mechanism between the first brake disc and the second brake disc comprises

[0020] a guide pin post, the first brake disc and the second brake disc are axially moved and circumferentially rotated by the guide pin post,

[0021] and a compression spring, the compression spring is sleeved on the guide pin post to move the first brake disc and the second brake disc away from each other in a non-force state, so that the first brake disc and the second brake disc have a space for the free rotation of the disc brake.

[0022] As an improvement, the guide pin post is fixedly connected or integrally formed on the second brake disc, and the second brake disc is provided with a guide pin hole matched with the guide pin post.

[0023] As an improvement, the shaft sleeve is extended with a receiving cavity, and the receiving cavity wraps the second brake disc.

[0024] As an improvement, the anti-rotation section is at least two planes cut from the circumferential surface of the rotating shaft, matched with the anti-rotation through hole of the disc brake, so that the rotating shaft and the disc brake cannot rotate relative to each other.

[0025] As an improvement, the anti-reverse rotation mechanism comprises a housing, a ratchet wheel, a pawl, an elastic member and an adjusting knob,

[0026] the housing is fixedly connected with the other side of the shaft sleeve, the ratchet wheel is fixedly installed inside the housing and rotates synchronously with the shaft sleeve,

[0027] the end of the rotating shaft is fixedly connected or integrally formed with a hollow mounting groove, the side wall of the mounting groove is circumferentially provided with a receiving groove, the pawl is rotatably installed in the receiving groove by a positioning column, and the clamping head of the pawl can extend out of the receiving groove and be matched with the ratchet wheel to control the one-way movement of the ratchet wheel;

[0028] the elastic member is installed in the receiving groove and abuts against the pawl to reset the pawl,

[0029] The adjusting knob is limited and rotatably installed in the installation groove cavity by the integrally fixed adjusting handle, the tail of the pawl is in contact with the surface of the adjusting handle, the adjusting handle is provided with a groove, and the tail of the pawl falls into the groove after the adjusting handle is rotated to a corresponding position, the clamping head of the pawl can extend out of the containing groove and be clamped with the ratchet wheel, and the one-way movement of the ratchet wheel is controlled.

[0030] That is, when the tail of the pawl is in contact with the circumferential surface of the adjusting handle, the elastic member is compressed, the pawl is in a retracted state, the pawl and the ratchet wheel are in a disengaged state, the rotating shaft is disengaged from the shell, and the shaft sleeve and the wheel body fixedly connected with the shell can be freely rotated in the positive and negative directions.

[0031] When the tail of the pawl falls into the groove of the adjusting handle, the elastic member is expanded, the clamping head of the pawl is popped out, the clamping head of the pawl is clamped with the ratchet wheel, the ratchet wheel is fixed in the shell, the shaft sleeve is fixedly connected with the shell, the wheel body is fixedly connected with the reel, and therefore the wheel body can only move in one direction at this time, and the reverse rotation of the wheel body is avoided.

[0032] As an improvement, the adjusting knob is rotatably installed at the end of the shaft sleeve by a pressing ring, and the rotation angle between the inside of the pressing ring and the adjusting knob is limited, so that the adjusting handle is rotatably installed in the installation groove cavity.

[0033] As an improvement, the adjusting knob is integrally formed with a ring of pressing steps around the periphery, the pressing ring and the end of the shaft sleeve form a cavity containing the pressing steps, and the pressing steps are rotatable in the cavity; and the pressing steps and the pressing ring are provided with rotation angle limiting blocks matched with each other.

[0034] That is, the pressing ring can be directly engaged and installed at the end of the shaft sleeve by threads, so that the adjusting knob is installed at the end of the shaft sleeve, the adjusting knob can be rotated within a certain angle range, the adjusting handle can be rotated within a certain angle range in the installation groove cavity, when the adjusting handle is rotated to a corresponding position, the tail of the pawl falls into the groove, the clamping head of the pawl can extend out of the containing groove and be clamped with the ratchet wheel, and the one-way movement of the ratchet wheel is controlled.

[0035] As an improvement, the force applying mechanism comprises a brake spanner, a first brake seat and a second brake seat, the brake spanner is rotatably sleeved at the end of the rotating shaft by a bearing, and a pressing piece is threadedly connected with the rotating shaft to prevent the brake spanner from being axially separated from the end of the rotating shaft.

[0036] The brake spanner is internally provided with a mounting groove, a first brake seat is arranged in the mounting groove, a limiting protrusion is arranged on the outer peripheral wall of the first brake seat and is matched with a limiting groove arranged on the inner wall of the mounting groove, so that the first brake seat is circumferentially limited and axially displaced in the mounting groove;

[0037] The second brake seat is fixedly arranged on the end side of the gear shifting housing,

[0038] The first brake seat and the second brake seat are both provided with arc-shaped slopes matched with each other and enabling the first brake seat to be axially displaced.

[0039] As an improvement, the first brake seat and the second brake seat are both provided with at least three arc-shaped slopes matched with each other.

[0040] In the utility model, the arc-shaped slopes are arranged on the first brake seat and the second brake seat, so that the first brake seat is axially displaced when the brake spanner is rotated, the rotating shaft is axially moved, the space between the first brake disc and the second brake disc is compressed, and the brake effect is realized.

[0041] A take-up reel comprises the inner clamping disc brake device as described above, and the rest of the structure is not described.

[0042] After the above technical scheme is adopted, the utility model has the beneficial effects that:

[0043] The inner clamping disc brake device provided by the utility model adopts the structure that the first brake disc and the second brake disc are arranged with the disc brake disc therebetween, the first brake disc and the second brake disc press the disc brake disc from both sides when the force applying mechanism applies pressure, the friction force is increased, the brake effect is realized, the technical problem that the single-sided pressing friction pressing piece brake effect is poor in the prior art is avoided, and the brake effect is poor, especially in a large kite reel.

[0044] Meanwhile, the first brake disc is directly fixedly arranged with or integrally formed with one side end face of the shaft sleeve, the opposite faces of the first brake disc and the second brake disc are both fixedly connected with or integrally formed with friction materials, the number of spare parts is reduced, the machining and assembling cost is reduced, the volume of the shaft sleeve is miniaturized, and the like.

[0045] In summary, the utility model realizes double-sided friction, reduces the number of spare parts, reduces the machining and assembling cost, and is beneficial to the miniaturization of the volume of the shaft sleeve. BRIEF DESCRIPTION OF DRAWINGS

[0046] Figure 1 is a structural schematic view of the whole kite reel;

[0047] Figure 2It is the partial enlarged structure schematic view of the inner clamping disc brake device;

[0048] Figure 3 It is the exploded structure schematic view of the inner clamping disc brake device;

[0049] Figure 4 It is the cross section structure schematic view of the inner clamping disc brake device;

[0050] Figure 5 It is the structure schematic view of the assembled inner clamping disc brake device;

[0051] Figure 6 It is the partial enlarged structure schematic view of the force applying mechanism;

[0052] Figure 7 It is the exploded structure schematic view of the force applying mechanism;

[0053] Figure 8 It is the structure schematic view of the anti-reversing mechanism;

[0054] Figure 9 It is the exploded structure schematic view of the anti-reversing mechanism;

[0055] Figure 10 It is the pawl installation structure schematic view of the anti-reversing mechanism.

[0056] In the figure, shaft sleeve 1, rotating shaft 2, second brake disc 3, disc brake disc 4, wheel body 5, first brake disc 6, bearing 7, anti-rotation section 8, anti-rotation through hole 9, heat dissipation hole 10, gear shifting shell 11, guide pin post 12, guide pin hole 13, accommodating cavity 14, shell 15, ratchet wheel 16, pawl 17, elastic member 18, adjusting knob 19, accommodating groove 20, adjusting handle 21, installation groove cavity 22, recess 23, pressing ring sleeve 24, pressing step 25, brake wrench 26, first brake seat 27, second brake seat 28, pressing piece 29, installation groove 30, limiting protrusion 31, limiting recess 32, arc-shaped slope 33, rocking handle 34, gear shifting device 35. DETAILED DESCRIPTION

[0057] The utility model will be further explained in combination with specific embodiments. But the purpose and the goal of these exampled embodiments are only used for example the utility model, and do not constitute any form of any limitation to the actual protection range of the utility model, and more non-limiting the protection range of the utility model to this.

[0058] Example 1

[0059] As Figures 2-10As shown, an inner clamping disc brake device includes a shaft sleeve 1, a rotating shaft 2, a second brake disc 3 and a disc brake 4, wherein the shaft sleeve 1, the disc brake 4 and the second brake disc 3 are sequentially arranged and are sleeved on the rotating shaft 2. The shaft sleeve 1 and the second brake disc 3 are rotatably installed relative to the rotating shaft 2, and the disc brake 4 cannot rotate on the rotating shaft 2. However, the second brake disc 3 and the disc brake 4 can axially move on the rotating shaft 2.

[0060] The shaft sleeve 1 is fixedly connected with a wheel body 5 of a take-up reel, that is, the shaft sleeve and the wheel body 5 rotate synchronously, and a first brake disc 6 is fixedly installed or integrally formed on one side end surface of the shaft sleeve 1. The rotating shaft 2 is rotatably installed in the shaft sleeve 1 by bearings. In order to achieve stable rotation effect, in the embodiment, the rotating shaft is installed in the shaft sleeve by two bearings 7, the inner rings of the two bearings are fixedly installed on the rotating shaft, and the outer rings of the two bearings 7 are dampingly assembled on the inner walls of the two ends of the shaft sleeve 1. In this way, the purpose of rotating the rotating shaft in the shaft sleeve is achieved, and the two ends of the rotating shaft extend out of the shaft sleeve (that is, extend out of the two bearings). A rotation-preventing surface 8 is arranged on the surface of the rotating shaft. The second brake disc 3 is rotatably sleeved on the rotating shaft, a limiting reset mechanism is arranged between the first brake disc 6 and the second brake disc 3, the first brake disc and the second brake disc synchronously rotate under the action of the limiting reset mechanism, and are axially close to and away from each other. The disc brake is sleeved on the rotating shaft and is between the first brake disc and the second brake disc, and the disc brake has a rotation-preventing through hole 9 matched with the rotation-preventing surface, so that the disc brake rotates with the rotating shaft. In the embodiment, the rotation-preventing surface is a circumferential surface of the rotating shaft which is cut into two planes, and is matched with the rotation-preventing through hole of the disc brake to achieve that the two cannot relatively rotate. In order to ensure the friction force of the disc brake, the first brake disc and the second brake disc, and to reduce the number of assembled components, a friction material is fixedly connected or integrally formed on the opposite surfaces of the first brake disc and the second brake disc. In order to ensure that the heat generated by friction is quickly dissipated, the disc brake, the first brake disc and the second brake disc are all provided with heat dissipation holes 10.

[0061] The limiting reset mechanism between the first brake disc and the second brake disc in the embodiment comprises a guide pin post 12 and a compression spring (not shown in the figure), the first brake disc and the second brake disc are axially moved and limited to rotate circumferentially by the guide pin post 12, and the compression spring is sleeved on the guide pin post to realize the far away of the first brake disc and the second brake disc in the non-force state, so that the first brake disc and the second brake disc have a space for the free rotation of the disc brake. In order to facilitate installation, the guide pin post is fixedly connected or integrally formed on the second brake disc, and the second brake disc is provided with a guide pin hole 13 matched with the guide pin post. In order to reduce the entry of external sundries into the shaft sleeve, the shaft sleeve extends a containing cavity 14, and the containing cavity 14 wraps the second brake disc 3.

[0062] In the embodiment, the rotating shaft is provided with a gear shift housing 11, and the mounting structure of the shaft sleeve and the rotating shaft is similar. Both ends of the gear shift housing are rotatably connected with the rotating shaft by bearings, and a gear shift device is installed in the gear shift housing. The gear shift device adopts the technology disclosed in Chinese patent CN202223584088.5. In this structure, the second brake disc 3 has a protrusion, which is abutted or fixedly connected to the inner ring of the bearing of the gear shift housing 11, that is, it is ensured that the second brake disc 3 cannot axially move to the position of the gear shift housing 11 under the blocking action of the gear shift housing 11, but can rotate around the rotating shaft.

[0063] In the embodiment, one end of the rotating shaft is provided with an anti-reverse mechanism, and the other end is provided with a force applying mechanism.

[0064] The anti-reverse mechanism comprises a housing 15, a ratchet wheel 16, a pawl 17, an elastic member 18 and an adjusting knob 19. The housing 15 is fixedly connected with or integrally formed with the other side of the shaft sleeve. The ratchet wheel is fixedly installed inside the housing 15 and rotates synchronously with the shaft sleeve. The end of the rotating shaft is integrally formed with a hollow installation groove. The side wall of the installation groove is provided with an accommodating groove 20 in the circumferential direction. The pawl 17 is rotatably installed in the accommodating groove 20 by means of a positioning column. The clamping head of the pawl can extend out of the accommodating groove and is adapted to the ratchet wheel to control the one-way movement of the ratchet wheel. The elastic member is installed in the accommodating groove 20 and abuts against the pawl to reset the pawl. The adjusting knob 19 is rotatably installed in the installation groove 22 by means of an integrally formed adjusting handle 21. The tail of the pawl 17 abuts against the surface of the adjusting handle 21. The adjusting handle is provided with a groove 23. After the adjusting handle is rotated to a corresponding position, the tail of the pawl falls into the groove 23. The clamping head of the pawl can extend out of the accommodating groove and is adapted to the ratchet wheel to control the one-way movement of the ratchet wheel.

[0065] In order to ensure the stability of installation, the adjusting knob is rotatably installed at the end of the shaft sleeve by means of a pressing ring 24. The rotation angle of the adjusting knob is limited between the inside of the pressing ring and the adjusting knob, so that the adjusting handle is rotatably installed in the installation groove. Furthermore, the periphery of the adjusting knob is integrally formed with a ring of pressing steps 25. The pressing ring 24 and the end of the shaft sleeve form a cavity for accommodating the pressing steps 25. The pressing steps 25 are rotatable in the cavity. The pressing steps 25 and the pressing ring 24 are provided with matched rotation angle limiting blocks (not shown in the figure). More specifically, the pressing ring 24 is directly engaged and installed at the end of the shaft sleeve by means of threads, so that the adjusting knob is installed at the end of the shaft sleeve. The adjusting knob can be rotated within a certain angle range, so that the adjusting handle is rotatable within a certain angle range in the installation groove. When the adjusting handle is rotated to a corresponding position, the tail of the pawl falls into the groove. The clamping head of the pawl can extend out of the accommodating groove and is adapted to the ratchet wheel to control the one-way movement of the ratchet wheel.

[0066] The anti-reverse mechanism has also been mentioned in existing technologies. Some structural details are readily understood by those skilled in the art. Its specific working principle is as follows: When the tail of the pawl abuts against the circumferential surface of the adjusting handle, the elastic element is compressed, the pawl is in a retracted state, and the pawl and ratchet are disengaged. This is equivalent to the shaft being disengaged from the housing. Therefore, the bushing and wheel, which are fixedly connected to the housing, can rotate freely in both directions. When the tail of the pawl enters the groove of the adjusting handle, the elastic element expands, the pawl's locking head pops out, and the pawl's locking head locks the ratchet. Since the ratchet is fixed inside the housing, the bushing is fixedly connected to the housing, and the bushing is fixedly connected to the wheel of the take-up and untake-down reel, the wheel can only move in one direction at this time, preventing the wheel from reversing.

[0067] In this embodiment, the force-applying mechanism includes a brake lever 26, a first brake seat 27, and a second brake seat 28. The brake lever is rotatably mounted on the end of the rotating shaft 2 using a bearing, and a pressure member 29 is threadedly connected to the rotating shaft 2 to prevent the brake lever from axially disengaging from the end of the rotating shaft. The brake lever 26 has an internal mounting groove 30, within which the first brake seat 27 is mounted. The outer peripheral wall of the first brake seat has a limiting protrusion 31 that matches a limiting groove 32 on the inner wall of the mounting groove, achieving circumferential limiting and axial displacement of the first brake seat and the mounting groove 30 (i.e., the brake lever 26). The second brake seat 28 is fixedly mounted on the end side of the shift housing, and both the first and second brake seats have mutually adaptable arc-shaped ramps 33 that allow the first brake seat to rotate in the axial direction of the rotating shaft. Each of the first and second brake seats has at least three cooperating arc-shaped ramps. In this embodiment, three are provided, evenly distributed.

[0068] In this way, by using the brake wrench, bearing, and pressure ring sleeve 24, the bushing and shift housing are axially fixed on the rotating shaft. When the brake wrench is applied, the only part that can be compressed is the limiting and resetting mechanism between the first brake disc and the second brake disc. The gap between the first brake disc and the second brake disc will increase or decrease, thereby causing the first brake disc and the second brake disc to contact or disengage from the disc brake disc.

[0069] Example 2

[0070] like Figure 1 As shown, the reel in this embodiment is a kite reel, which has the internal disc brake device of Embodiment 1, and also has a reel body, a crank handle 34, a shifting device 35, etc. Of course, it can also be a fishing reel.

[0071] The general working process of this utility model is as follows:

[0072] By setting the arc-shaped slope on the first brake seat and the second brake seat, when the brake handle rotates, the first brake seat can be axially displaced to drive the rotating shaft to axially move, so that the space between the first brake disc and the second brake disc is compressed to achieve the brake effect.

[0073] More specifically, when no pressure is applied, the first brake disc and the second brake disc are away from each other under the action of the limiting reset mechanism, and there is a space between them for the disc brake to rotate freely, at this time, the relationship between the rotating shaft and the shaft sleeve is a bearing connection (without considering the anti-reverse mechanism), the shaft sleeve and the wheel body can rotate around the rotating shaft without obstruction, and the take-up reel is in a free take-up state.

[0074] When the force applying mechanism is applied, the limiting reset mechanism is compressed, the first brake disc and the second brake disc are close to each other under the action of the force applying mechanism and are clamped and contacted on both sides of the disc brake to form a brake effect, which is equivalent to the first brake disc, the second brake disc and the disc brake forming a common rotating whole, since the disc brake is always rotating with the rotating shaft, therefore, in this state, the shaft sleeve and the wheel body will rotate with the rotating shaft.

[0075] For the structural devices known to those skilled in the art in the embodiments, no further description is given, and it is believed that those skilled in the art can obtain them by searching and finally realize the technical solutions described in the utility model.

[0076] It should be understood that the use of these embodiments is only for the purpose of illustrating the utility model and is not intended to limit the protection scope of the utility model. In addition, it should also be understood that after reading the technical content of the utility model, those skilled in the art can make various changes, modifications and / or variations to the utility model, and all these equivalent forms also fall within the protection scope defined by the claims attached to the present application.

Claims

1. An inner clip disc brake device, characterized by: Comprising a shaft sleeve, which is fixedly connected with a wheel body of a winding and unwinding wheel and rotates with the wheel body, and a first brake disc is fixedly installed or integrally formed on one side end face of the shaft sleeve; a rotating shaft, which is rotatably installed in the shaft sleeve by a bearing and extends to the outside of the shaft sleeve at both ends, one end of the rotating shaft is provided with an anti-reverse mechanism, the other end is provided with a force applying mechanism, and a rotation preventing surface is arranged on the surface of the rotating shaft; a second brake disc, which is rotatably sleeved on the rotating shaft, a limiting reset mechanism is arranged between the first brake disc and the second brake disc, the first brake disc and the second brake disc rotate synchronously under the action of the limiting reset mechanism, and are close to or away from each other in the axial direction; and a disc brake disc, which is sleeved on the rotating shaft and is between the first brake disc and the second brake disc, and the disc brake disc has a rotation preventing through hole matched with the rotation preventing surface, so that the disc brake disc rotates with the rotating shaft.

2. An inner clamp disc brake device as claimed in claim 1, characterized in that: The opposite surfaces of the first brake disc and the second brake disc are fixedly connected or integrally formed with friction materials.

3. An inner clamp disc brake device as claimed in claim 2, characterized in that: The first brake disc and the second brake disc are both provided with heat dissipation holes.

4. An inner clamp disc brake device as claimed in claim 1, characterized in that: The limiting reset mechanism between the first brake disc and the second brake disc comprises a guide pin, which is used to realize the axial movement and limit the circumferential rotation of the first brake disc and the second brake disc, and a compression spring, which is sleeved on the guide pin to realize the away of the first brake disc and the second brake disc in the non-force applying state, so that the first brake disc and the second brake disc have a space for the free rotation of the disc brake disc.

5. An inner clamp disc brake device as claimed in claim 4, characterized in that: The guide pin is fixedly connected or integrally formed on the second brake disc, and a guide pin hole matched with the guide pin is arranged on the second brake disc.

6. An inner clamp disc brake device as claimed in claim 1, characterized in that: The rotation preventing surface is at least two planes cut from the circumferential surface of the rotating shaft, which are matched with the rotation preventing through hole of the disc brake disc to realize the relative rotation of the two.

7. An inner clamp disc brake device as claimed in claim 1, characterized in that: The anti-reverse mechanism comprises a housing, a ratchet wheel, a pawl, an elastic member and an adjusting knob, the housing is fixedly connected or integrally formed with the other side of the shaft sleeve, the ratchet wheel is fixedly installed inside the housing and rotates synchronously with the shaft sleeve, the end of the rotating shaft is fixedly connected or integrally formed with a hollow installation groove, the side wall of the installation groove is circumferentially provided with a containing groove, the pawl is rotatably installed in the containing groove by a positioning column, and the clamping head of the pawl can extend out of the containing groove and be matched with the ratchet wheel to control the one-way movement of the ratchet wheel; the elastic member is installed in the containing groove and abuts against the pawl to reset the pawl, the adjusting knob is limitingly and rotatably installed in the installation groove by a fixedly connected adjusting handle, the tail of the pawl abuts against the surface of the adjusting handle, the adjusting handle is provided with a groove, after the adjusting handle is rotated to the corresponding position, the tail of the pawl falls into the groove, the clamping head of the pawl can extend out of the containing groove and be clamped with the ratchet wheel to control the one-way movement of the ratchet wheel.

8. An inner clamp disc brake device as claimed in claim 7, characterized in that: The adjusting knob is rotatably installed on the end of the shaft sleeve by a pressing ring, and the rotation angle is limited between the inside of the pressing ring and the adjusting knob.

9. An inner clamp disc brake device as claimed in claim 1, characterized in that: A shift housing is arranged on the rotating shaft, and both ends of the shift housing are rotatably connected with the rotating shaft by bearings, and a shift device is arranged in the shift housing. The force applying mechanism comprises a brake wrench, a first brake seat and a second brake seat, the brake wrench is rotatably sleeved on the end of the rotating shaft by a bearing, a pressing member is threadedly connected with the rotating shaft to prevent the brake wrench from being axially separated from the end of the rotating shaft. An installation groove is formed in the inside of the brake wrench, the first brake seat is arranged in the installation groove, a limiting protrusion is arranged on the outer circumferential wall of the first brake seat and is matched with a limiting groove formed in the inner wall of the installation groove to limit the first brake seat in the circumferential direction of the installation groove and axially displace. The second brake seat is fixedly installed on the end side of the shift housing, and the first brake seat and the second brake seat are both provided with arc slopes which are matched with each other and allow the first brake seat to displace in the axial direction of the rotating shaft.

10. A reel, characterised in that: An inner clamping disc brake device as claimed in any one of claims 1-9.

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