Locking structure and multi-joint constant-speed training device

Abstract

The utility model discloses a locking structure and a multi-joint constant-speed training device. The locking structure comprises a fixing ring, a rotating shaft and a threaded rod; the fixing ring comprises a ring wall and a through hole located in the ring wall, an open groove is formed in the ring wall, locking holes are formed in the positions, located on the two sides of the open groove, of the ring wall, and internal threads are formed in the locking holes; one end of the rotating shaft is used for being inserted into the through hole; the threaded rod is provided with an external thread; during working, the threaded rod is inserted into one of the locking holes, and the opening size of the opening groove is tightened and reduced through matching of the external threads of the threaded rod and the internal threads of the two locking holes, so that the inner wall of the fixing ring is in firm contact with the rotating shaft inserted into the through hole. The fixing ring can be screwed down by rotating the threaded rod, and axial and rotary fixing of the rotating shaft is achieved in a low-cost mode.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of the connection locking of rotating parts, and particularly relates to a locking structure and a multi-joint constant speed training device. BACKGROUND

[0002] At present, there are various locking mechanisms, which can be roughly divided into three categories. The first category is to use friction force for locking, but this kind of friction force locking not only has small torque, but also the friction material is easy to slip after frequent use, and the service life is short. The second category is to use steel balls, steel pins and the like to be inserted into the reserved holes of the rotating shaft to realize positioning, but this is a kind of step positioning, which does not belong to the stepless range. The third category is to use hydraulic machinery for positioning, mainly using connecting rods, pistons and other hydraulic elements for positioning. This kind of device can realize stepless positioning, but due to high manufacturing precision and complex mechanism, it is not only expensive, but also has high maintenance cost.

[0003] For example, a rotating mechanism connecting fixed shaft of a steam turbine generator disclosed in Chinese utility model patent CN206918033U, comprising a fixed seat and a connecting shaft, the fixed seat is provided with a recess with an internal thread structure on the upper side, a first positioning hole in the form of a circle is arranged in the middle of the recess, an internal thread hole structure fixing hole is arranged on the left side of the fixed seat, a square notch is arranged on the front side of the fixed seat, the connecting shaft is arranged on the right side of the fixed seat, and the connecting shaft is provided with an external thread structure on both sides, and a cylindrical structure is arranged in the middle. The connecting fixed shaft provided by the utility model realizes positioning in the form of a reserved hole, but it cannot realize stepless positioning. SUMMARY

[0004] In order to solve at least one of the problems existing in the prior art, the utility model provides a locking structure and a multi-joint constant speed training device. The rotating shaft of the locking structure is inserted into the fixed ring. The fixed ring is tightened under the action of the threaded rod, the axial and rotational fixation of the rotating shaft can be realized, the stepless fixation in the rotational direction can be realized, and the fixation at any rotation angle can be realized.

[0005] In order to achieve the purpose of the utility model, the utility model provides a locking structure, which comprises a fixed ring, a rotating shaft and a threaded rod.

[0006] The fixed ring comprises a ring wall and a through hole in the ring wall. An open slot is arranged on the ring wall. Locking holes are arranged on both sides of the open slot on the ring wall. An internal thread is arranged in the locking hole.

[0007] One end of the rotating shaft is used for being inserted into the through hole.

[0008] An external thread is arranged on the threaded rod.

[0009] In operation, the threaded rod is inserted into one of the locking holes, and the opening size of the opening slot is reduced by the cooperation of the external thread of the threaded rod and the internal thread of the two locking holes, so that the inner wall of the fixed ring is in firm contact with the rotating shaft inserted into the through hole.

[0010] By the above technical scheme, in operation, the fixed ring can be tightened by rotating the threaded rod, so that the rotating shaft is fixed at any rotation angle.

[0011] As a preferred technical scheme, the contact surfaces of the rotating shaft and the fixed ring are knurled and toothed.

[0012] As a preferred technical scheme, the knurling and the toothed processing are performed on any one of the contact surfaces of the rotating shaft and the fixed ring.

[0013] As a preferred technical scheme, the knurling shape of the knurling processing is any one of straight lines, diagonal lines, and mesh lines.

[0014] As a preferred technical scheme, the knurls of the knurling processing are uniformly distributed on the surface of the contact surface.

[0015] As a preferred technical scheme, the initial diameter of the knurling processing is 0.2 mm smaller than the standard diameter, and the diameter of the knurling after the knurling processing is within 5 wires of the standard diameter.

[0016] As a preferred technical scheme, the material of the rotating shaft is AISI304, and the material of the fixed ring is AISI304.

[0017] As a preferred technical scheme, in the toothed processing, the tooth root depth is 15-20 wires.

[0018] As a preferred technical scheme, the fixed ring is inserted into the knurled area of the rotating shaft, the threaded rod is rotated, the fixed ring is tightened, and the fastening torque is 12-13 N*M.

[0019] As a preferred technical scheme, a handle is arranged on the threaded rod.

[0020] The utility model also provides a multi-joint constant speed training device, including preceding locking structure, wherein, the power head in the constant speed training device is connected with the rotating shaft in the locking structure, the rotating shaft is inserted into the fixed ring, the threaded rod is arranged in the fixed ring inside, rotates the threaded rod, tightens the fixed ring, makes the rotating shaft fixed immovably at any rotation angle.

[0021] Compared with the prior art, the utility model has at least the following beneficial effects:

[0022] (1) The utility model provides a kind of locking structure, rotating shaft is inserted into fixed ring, fixed ring is tightened fixed ring under the action of threaded rod, the axial direction and rotation of rotating shaft are realized with low-cost mode Fixed, it can also realize stepless fixing in the direction of rotation, and the fixing of any rotation angle can be realized.

[0023] (2) The utility model can be extracted in the contact surface of rotating shaft and fixed ring Increase knurling processing and gear ring processing, so that the contact friction when tightening fixed ring can be increased. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 The overall structure diagram of the locking structure provided in the utility model embodiment.

[0025] Figure 2 For Figure 1 Another angle structure schematic view.

[0026] Figure 3 The overall structure diagram of the locking structure provided in the utility model embodiment is applied to adjust power head.

[0027] Figure 4 The structure section schematic view of fixed ring in the utility model embodiment.

[0028] In the drawing: 1-rotating shaft, 2-fixed ring, 3-threaded rod, 3-1-threaded rod handle, 4-power head, 5-power head fixed support, 6-worm gear reducer, 7-locking hole, 7-1-first locking hole, 7-2-second locking hole, 8-opening slot. DETAILED DESCRIPTION

[0029] To make the purpose, technical scheme and advantages of the utility model embodiment clearer, the technical scheme in the utility model embodiment will be described clearly and completely in the following with the drawings in the utility model embodiment, obviously, the described embodiment is part of the utility model embodiment, rather than all the embodiments. Based on the embodiment in the utility model, all other embodiments obtained by the person skilled in the art without making creative labor are within the protection scope of the utility model.

[0030] In addition, the description of "first", "second" and the like in the present application is only for the purpose of description, and does not mean to particularly indicate the order or sequence, nor to limit the present application. It is only to distinguish the components or operations described by the same technical terms, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled in the art. When the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor within the protection scope required by the present application.

[0031] Embodiment 1

[0032] Please refer to Figure 1 , Figure 2 and Figure 4 , the locking structure provided by the embodiment comprises a fixed ring 2, a rotating shaft 1 and a threaded rod 3.

[0033] The fixed ring 2 comprises a ring wall and a through hole in the ring wall, and an open slot 8 is arranged on the ring wall. Locking holes 7 are arranged on the ring wall on both sides of the open slot 8, and internal threads are arranged in the locking holes 7.

[0034] One end of the rotating shaft 1 is used for inserting into the through hole;

[0035] The threaded rod 3 is provided with external threads;

[0036] In operation, the threaded rod 3 is inserted into one of the locking holes, and the opening size of the open slot 8 is tightened and reduced by the cooperation of the external threads of the threaded rod 3 and the internal threads of the two locking holes, so that the inner wall of the fixed ring 2 is in firm contact with the rotating shaft 1 inserted into the through hole.

[0037] Embodiment 2

[0038] Please refer to Figure 1 , Figure 2 and Figure 4The utility model provides a kind of locking structure, including rotating shaft 1, fixed ring 2 and threaded rod 3, the fixed ring 2 includes ring wall and the through hole in the ring wall, opening slot 8 is provided on the ring wall, locking hole 7 is opened in the ring wall and located the both sides of opening slot 8, defined as first locking hole 7-1 and second locking hole 7-2, inner thread is equipped in first locking hole 7-1 and second locking hole 7-2;Rotating shaft 1 can be inserted into the through hole of fixed ring 2;The outer wall of one end of threaded rod 3 is opened with external thread;When working, the end of threaded rod 3 opened with external thread is inserted into first locking hole 7-1, rotating threaded rod 3, the external thread on threaded rod 3 and the inner thread in first locking hole 7-1 are matched, and threaded rod 3 is screwed into second locking hole 7-2 and is matched with the inner thread in second locking hole 7-2, so that the opening size of opening slot 8 on the fixed ring 2 can be tightened and reduced, so that rotating shaft 1 can be firmly contacted with the inner wall of fixed ring 2, rotating shaft 1 is locked, so that rotating shaft 1 is fixedly immovable at any rotation angle.

[0039] Example 3

[0040] Please refer to Figure 1 、 Figure 2 And Figure 4 The utility model provides a kind of locking structure, including rotating shaft 1, fixed ring 2 and threaded rod 3, the fixed ring 2 includes ring wall and the through hole in the ring wall, opening slot 8 is provided on the ring wall, locking hole 7 is opened in the ring wall and located the both sides of opening slot 8, defined as first locking hole 7-1 and second locking hole 7-2, inner thread is equipped in first locking hole 7-1 and second locking hole 7-2;Rotating shaft 1 can be inserted into the through hole of fixed ring 2;The outer wall of one end of threaded rod 3 is opened with external thread;When working, the end of threaded rod 3 opened with external thread is inserted into first locking hole 7-1, rotating threaded rod 3, the external thread on threaded rod 3 and the inner thread in first locking hole 7-1 are matched, and threaded rod 3 is screwed into second locking hole 7-2 and is matched with the inner thread in second locking hole 7-2, so that the opening size of opening slot 8 on the fixed ring 2 can be tightened and reduced, so that rotating shaft 1 can be firmly contacted with the inner wall of fixed ring 2, rotating shaft 1 is locked, so that rotating shaft 1 is fixedly immovable at any rotation angle.

[0041] In the embodiment, the contact surface of rotating shaft 1 and fixed ring 2 is processed. Preferably, the contact surface of rotating shaft 1 is knurled, and the inner ring of fixed ring 2 is treated as a gear ring.

[0042] In the embodiment, the knurling treatment and the gear ring treatment can be performed on any one of the contact surfaces of the rotating shaft 1 and the fixed ring 2. Specifically, the treatment scheme of the contact surface of the rotating shaft 1 and the fixed ring 2 can be knurling treatment and knurling treatment, knurling treatment and gear ring treatment, and gear ring treatment and knurling treatment. By performing the surface treatment on the contact surface, the friction coefficient of the surface can be increased, and the rotation locking torque can be increased.

[0043] In the embodiment, the fixed ring 2 is inserted into the knurling area of the rotating shaft 1, and the threaded rod 3 is rotated to tighten the fixed ring 2, and the fastening torque is 12-13 N*M; N*M is the unit of torque (Newton meter), N is the unit of force (Newton), and M is the unit of length (meter); the torque is the size of the moment in physics, which is equal to the product of the force and the force arm.

[0044] In the embodiment, the material of the rotating shaft is AISI304, and the material of the fixed ring is AISI304, so that the surface contact hardness is achieved.

[0045] Embodiment 4

[0046] Please refer to Figure 1 , Figure 2 and Figure 4 , the utility model provides a kind of locking structure, including rotating shaft 1, fixed ring 2 and threaded rod 3, the fixed ring 2 includes ring wall and the through hole in the ring wall, opening slot 8 is arranged on the ring wall, locking hole 7 is set on the ring wall and located at the both sides of the opening slot 8, defined as first locking hole 7-1 and second locking hole 7-2, inner thread is equipped in the first locking hole 7-1 and the second locking hole 7-2;The rotating shaft 1 can be inserted into the through hole of the fixed ring 2;The outer wall of one end of the threaded rod 3 is provided with external thread;When working, the end of the threaded rod 3 provided with external thread is inserted into the first locking hole 7-1, the threaded rod 3 is rotated, the external thread on the threaded rod 3 and the inner thread in the first locking hole 7-1 are matched, and the threaded rod 3 is screwed into the second locking hole 7-2 and matched with the inner thread in the second locking hole 7-2, so that the opening size of the opening slot 8 on the fixed ring 2 can be tightened and reduced, so that the rotating shaft 1 can be firmly contacted with the inner wall of the fixed ring 2, the rotating shaft 1 is locked, and the rotating shaft 1 is fixedly rotated at any rotation angle.

[0047] In the embodiment, the knurling treatment and the gear ring treatment are performed on any one of the contact surfaces of the rotating shaft and the fixed ring.

[0048] In the embodiment, the knurling shape of the knurling treatment is any one of straight line, diagonal line and net pattern.

[0049] In the knurling treatment, the knurls are uniformly distributed on the surface of the contact surface.

[0050] In the knurling treatment, the initial diameter processed is 0.2mm smaller than the standard diameter, and the diameter after the knurling is within 5 wires of the standard diameter, so as to ensure the rotation locking torque when the fixing ring 2 is tightened.

[0051] In the knurling treatment, the tooth root depth is 15-20 wires.

[0052] Embodiment 5

[0053] Please refer to Figure 1 , Figure 2 and Figure 4 , the utility model provides a kind of locking structure, including rotating shaft 1, fixed ring 2 and threaded rod 3, the fixed ring 2 includes ring wall and the through-hole in the ring wall, opening slot 8 is provided on the ring wall, locking hole 7 is set on the ring wall and is located at the both sides of opening slot 8, it is defined as first locking hole 7-1 and second locking hole 7-2, inner thread is equipped in first locking hole 7-1 and second locking hole 7-2;The rotating shaft 1 can be inserted into the through-hole of the fixed ring 2;The outer wall of one end of the threaded rod 3 is opened and is equipped with external thread;When working, the end of the threaded rod 3 opened with external thread is inserted into first locking hole 7-1, rotating threaded rod 3, the external thread on threaded rod 3 and the inner thread in first locking hole 7-1 are matched, and threaded rod 3 is screwed into second locking hole 7-2 and is matched with the inner thread in second locking hole 7-2, so that the opening size of opening slot 8 on the fixed ring 2 can be tightened and reduced, so that the rotating shaft 1 can be firmly contacted with the inner wall of the fixed ring 2, the rotating shaft 1 is locked, so that the rotating shaft 1 is fixedly rotated at any rotation angle.

[0054] In the embodiment, one end of the threaded rod 3 is provided with a threaded rod handle 3-1, which is used to provide a force arm when rotating the threaded rod 3 to tighten and reduce the opening size of the opening slot 8 on the fixed ring 2, so as to easily rotate the threaded rod 3 through the threaded rod handle 3-1.

[0055] The locking structure provided in the foregoing embodiments of the application is provided with the opening slot 8 and the locking hole 7 with inner thread on the fixed ring 2, the threaded rod 3 is inserted into the locking hole 7, the threaded rod 3 is rotated, the opening slot 8 on the fixed ring 2 is tightened through the cooperation of inner and outer threads, so that the contact surface of the rotating shaft 1 and the fixed ring 2 is firmly contacted, and the threaded rod 3 can fix the rotating shaft 1 at any rotation angle when tightening the fixed ring 2.

[0056] Embodiment 6

[0057] The embodiments are combined with the drawings Figure 3 The lock structure provided by the foregoing embodiments of the utility model has specific application in the technical field of multi-joint constant speed training devices, and can be applied to other technical fields and is not limited to the following mode. The present embodiment specifically describes its use in a multi-joint constant speed training device.

[0058] The multi-joint constant speed training device adjusts the rotation angle of the power head 4 according to the joint rehabilitation movement of the patient to meet different patient use conditions. During use, due to the structural defects of the worm gear reducer 6 itself, the worm gear has a certain gap, and the power head 4 will rotate during use, and there is no way to fix it at the appropriate rotation angle for the patient to work.

[0059] Please refer to Figure 3 The power head 4 is connected to the output shaft of the worm gear reducer 6 at one end through a key groove, and is connected to the rotating shaft 1 at the other end. The rotating shaft 1 is inserted into the fixed ring 2, and the contact surface between the rotating shaft 1 and the fixed ring 2 is knurled and toothed. The threaded rod 3 is arranged inside the fixed ring 2, and the fixed ring 2 is connected and fixed to the power head fixed support 5.

[0060] The handle rotates the input shaft of the worm gear reducer 6, which drives the rotation of the power head 4. When the power head 4 is rotated to any angle suitable for the patient to use, the threaded rod 3 is rotated to tighten the fixed ring 2, so that the rotating shaft 1 is fixed, and the power head 4 is fixed.

[0061] The above is only the preferred embodiment of the utility model, and is not used to limit the utility model. For those skilled in the art, the utility model can have various changes and changes. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A lock structure characterized by comprising: The fixed ring, the rotating shaft and the threaded rod are included. The fixed ring includes a ring wall and a through hole in the ring wall, and an open slot is arranged on the ring wall, and locking holes are arranged on both sides of the open slot in the ring wall, and internal threads are arranged in the locking holes. One end of the rotating shaft is used for inserting into the through hole. An external thread is arranged on the threaded rod. In operation, the threaded rod is inserted into one of the locking holes, and the opening size of the open slot is reduced by the cooperation of the external thread of the threaded rod and the internal threads of the two locking holes, so that the inner wall of the fixed ring is in firm contact with the rotating shaft inserted into the through hole.

2. The locking structure according to claim 1, wherein The contact surfaces of the rotating shaft and the fixed ring are knurled and treated with a gear ring.

3. The locking structure of claim 2, wherein Either one of the knurling and the gear ring treatment is performed on any one surface of the contact surfaces of the rotating shaft and the fixed ring.

4. The locking structure of claim 2, wherein The knurling shape of the knurling treatment is any one of straight lines, inclined lines and net lines.

5. The locking structure of claim 2, wherein The knurls of the knurling treatment are uniformly distributed on the surface of the contact surface.

6. The locking structure of claim 2, wherein In the gear ring treatment, the root depth is 15-20 threads.

7. The locking structure of claim 2, wherein In the knurling treatment, the initial diameter of the processing is 0.2mm smaller than the standard diameter, and in the knurling treatment, the diameter after the knurling is within 5 threads of the standard diameter.

8. The locking structure of claim 1, wherein The material of the rotating shaft is AISI304, and the material of the fixed ring is AISI304.

9. The locking structure according to any one of claims 1 to 8, wherein A handle is arranged on the threaded rod.

10. A multi-articulating isokinetic exercise apparatus, characterized by, The locking structure of any one of claims 1-9 is included, wherein the power head in the constant speed training device is connected with the rotating shaft in the locking structure, the rotating shaft is inserted into the fixed ring, the threaded rod is arranged inside the fixed ring, the threaded rod is rotated, the fixed ring is tightened, and the rotating shaft is fixed and immovable at any rotating angle.

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