A locking mechanism for a rotating part and a rail grinding device containing the same

Abstract

The present invention relates to the technical field of locking mechanisms, and discloses a locking mechanism of a rotating part, wherein a fixed locking cylinder is coaxially penetrated outside the rotating part, and an annular gap is formed between the inner wall of the locking cylinder and the outer cylindrical surface of the rotating part; a toothed disc group meshing and connected under the action of a preload force is arranged in the annular gap; the toothed disc group includes a movable toothed disc that can move in the annular gap, a evasion hole is opened in the middle of the movable toothed disc and is slidably penetrated on the rotating part, and a fixed toothed disc fixedly sleeved on the rotating part, and the movable toothed disc and the fixed toothed disc are connected by end face teeth; the outer cylindrical surface of the movable toothed disc and the inner wall of the locking cylinder are key connections that limit the rotation of the movable toothed disc. A rail grinding device containing the above-mentioned locking mechanism is also disclosed, wherein a grinding fixing frame is fixedly connected to the rotating part, and a plurality of grinding units arranged in a series are fixed on the outer periphery of the grinding fixing frame. The locking mechanism of the rotating part uses a continuous force applied to press the meshing part when the end face teeth are meshed, thereby locking the rotating part to prevent it from rotating freely.

Description

Technical Field

[0001] The invention relates to the technical field of locking mechanisms, in particular to a locking mechanism of a rotating part and a rail grinding device containing the locking mechanism. Background Art

[0002] The commonly used rotation locking methods for rotating parts (rotating shafts) are mainly the following:

[0003] 1. The motor with brake locks the rotating parts.

[0004] 2. Use pins to lock the rotating parts axially or radially.

[0005] 3. Achieve locking effect through self-locking of friction angle, such as worm wheel-worm connection, locking the worm.

[0006] All of the above rotation locking methods have some disadvantages:

[0007] 1. Conventional locking is generally used in relatively static environments, so there will not be much problem. However, when conventional locking methods are used in special environments, such as the railway industry, due to long-term and large-scale vibrations during vehicle operation, it is easy to cause locking failure.

[0008] Second, the redundancy is not high. Once one set of locking methods fails, the overall locking will fail. As in the second scheme, although multiple sets of locking mechanisms can be arranged (multiple sets of pins are fixedly installed on the circumference of the rotating part), due to the limited space of the mechanism, the number of locking mechanisms is small, and it will also increase the complexity of the overall mechanism, making daily maintenance inconvenient, and correspondingly increasing the cost of use.

[0009] 3. Schemes 1 and 3 rely on friction locking, but their disadvantage is that when they are used in an environment with a lot of vibration, the locking mechanism may be slightly offset, resulting in locking failure. In addition, in Scheme 2, the rotating part is locked axially or radially by a pin. At this time, the pin is subject to shear force. In an environment with a lot of vibration, the pin and the pin hole will be squeezed or even torn, resulting in an increase in the gap between the matching surfaces of the pin and the pin hole, and the locking failure.

[0010] In summary, there is an urgent need for a high-stability, high-reliability locking mechanism for locking a rotating part (rotating shaft) to effectively prevent the rotating part from locking and failing, especially for the special industry of railway transportation. Summary of the invention

[0011] The present invention aims to provide a locking mechanism for a rotating part and a rail grinding device containing the same, so as to solve the above-mentioned technical problems in the prior art. By continuously applying a pre-tightening force, when the end face teeth of the toothed disc group are meshed and locked with each other, the rotating part can be stably and reliably locked in a vibrating state to prevent the rotating part from rotating due to locking failure.

[0012] One or more technical solutions adopted by the present invention are:

[0013] A locking mechanism for a rotating part, wherein a fixed locking cylinder is coaxially penetrated outside the rotating part, and an annular gap is formed between the inner wall of the locking cylinder and the outer cylindrical surface of the rotating part; a toothed disc group meshingly connected under the action of a preload is arranged in the annular gap; the toothed disc group includes a movable toothed disc movable in the annular gap, a middle part of the movable toothed disc is provided with an avoidance hole and is slidably penetrated on the rotating part, and a fixed toothed disc fixedly sleeved on the rotating part, the movable toothed disc and the fixed toothed disc are connected by end face teeth; the outer cylindrical surface of the movable toothed disc and the inner wall of the locking cylinder are key-connected to limit the rotation of the movable toothed disc.

[0014] According to the locking mechanism of the rotating member provided by the present invention, the key connection is a spline connection, the inner wall of the locking cylinder is formed with an internal spline, and the outer circle of the movable gear plate is formed with an external spline that matches the internal spline.

[0015] According to the locking mechanism of the rotating member provided by the present invention, an elastic member is fixedly arranged in the annular gap, and the elastic member abuts against an end of the movable gear plate away from the fixed gear plate.

[0016] According to the locking mechanism of the rotating member provided by the present invention, the elastic member is a spring assembly, which includes spring fixing rings arranged opposite to each other, and a plurality of springs arranged in a ring shape are fixed between the two spring fixing rings.

[0017] According to the locking mechanism of the rotating member provided by the present invention, the spring is a rectangular spring, and two ends of the rectangular spring are respectively fixedly connected to two spring fixing rings.

[0018] According to the locking mechanism of the rotating member provided by the present invention, the spring fixing ring is slidably arranged on the rotating member, the outer circle of the spring fixing ring is formed with an outer spline adapted to the inner spline, and the spring fixing ring is spline-connected to the locking cylinder.

[0019] According to the locking mechanism of the rotating member provided by the present invention, a rotating member support seat is provided at the end of the rotating member close to the fixed gear plate.

[0020] According to the locking mechanism of the rotating member provided by the present invention, the rotating member support seat includes a supporting cylinder, in which the rotating member is inserted, and a rolling bearing is embedded and fixed between the supporting cylinder and the rotating member.

[0021] Another one or more technical solutions adopted by the present invention are:

[0022] A rail grinding device comprises a locking mechanism of a rotating part as described in any one of the above technical solutions; the other end of the rotating part is fixedly connected to a rotating part support seat, a grinding fixing frame is fixedly connected to the rotating part, and a plurality of grinding units arranged in a series are fixed on the outer periphery of the grinding fixing frame.

[0023] According to the rail grinding device provided by the present invention, two groups of rail grinding devices are provided corresponding to the width of the rails on the rails, and a frame is fixedly connected between the two groups of rail grinding devices.

[0024] The beneficial effects of the present invention are:

[0025] The locking mechanism of the rotating part of the present invention can lock the rotating part and prevent it from rotating, and the locking is stable and safe. The locking mechanism of the rotating part uses a continuous force to press the meshing point when the end face teeth are engaged, and locks the rotating part to prevent it from rotating freely. The locking mechanism of the rotating part can stably and reliably lock the rotating part in rotation under vibration or other harsh working conditions. In addition, the greater the force that presses the end face teeth, the tighter the meshing degree of the end face teeth, and the meshing end face teeth are not easy to slip and disengage, causing the rotation lock to fail.

[0026] Railway transportation has heavy loads, small friction coefficient, long braking distance, large inertia, and complex railway trunk lines. Failures will cause chain reactions. This locking mechanism is applied to the special industry of railway transportation. The end-face toothed gear set is used to lock the rotating parts. Compared with the traditional rotary locking method, it has greater advantages in safety, reliability, and redundancy. It can ensure the safe and effective normal operation of railway transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of a preferred embodiment of the present invention;

[0028] Figure 2 is a schematic diagram of the structure of the elastic member;

[0029] Figure 3 It is a schematic diagram of the structure of the locking cylinder;

[0030] Figure 4 It is a structural schematic diagram of a preferred embodiment of the present invention;

[0031] To facilitate the display of the internal structure, the locking cylinder is omitted;

[0032] Figure 5 yes Figure 4 A cross-sectional schematic diagram of

[0033] Figure 6 It is a structural schematic diagram of a preferred embodiment of the present invention;

[0034] Figure 7 This is a schematic diagram of grinding (partial, some parts omitted); DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0036] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore they cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0037] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; of course, it can also be a mechanical connection or an electrical connection; in addition, it can also be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] like Figure 1-Figure 7 Shown

[0039] Embodiment 1

[0040] The present invention provides a locking mechanism of a rotating member 7, wherein a fixed locking cylinder 3 is coaxially penetrated outside the rotating member 7, and an annular gap is formed between the inner wall of the locking cylinder 3 and the outer cylindrical surface of the rotating member 7; a gear plate group meshingly connected under the action of a preload force is arranged in the annular gap; the gear plate group includes a movable gear plate 4 movable in the annular gap, a avoidance hole is opened in the middle of the movable gear plate 4 and is slidably penetrated on the rotating member 7, and a fixed gear plate 5 fixedly sleeved on the rotating member 7, and the movable gear plate 4 and the fixed gear plate 5 are connected by end face teeth; the outer cylindrical surface of the movable gear plate 4 and the inner wall of the locking cylinder 3 are key-connected to limit the rotation of the movable gear plate 4.

[0041] As for the end face teeth, they are composed of many small teeth combined into a continuous circle, surrounding the surfaces of the movable gear plate 4 and the fixed gear plate 5. The end face teeth of the movable gear plate 4 and the fixed gear plate 5 mesh with each other under the action of the preload force. Even if a few tooth blocks are accidentally broken, the other normal end face teeth will not fail to mesh and fasten in a short period of time, thereby continuing to ensure the state of the locked rotating part 7. The redundancy is high and there will be no locking failure. In addition, the meshing surface between the end face teeth is a mutually matching inclined surface or curved surface (depending on the shape of the tooth block). Under the action of the preload force, the meshing surface will have a higher and higher fit, and the degree of meshing and fastening will be greatly improved, thereby increasing the safety of the fastening and locking.

[0042] The key connection is a spline connection, the inner wall of the locking cylinder 3 is formed with an internal spline, and the outer circle of the movable gear plate 4 is formed with an external spline that matches the internal spline.

[0043] The length directions of the keyway of the internal spline and the key of the external spline are the same as the axis of the rotating member 7 .

[0044] The spline connection can lock the movable toothed disc 4, the fixed toothed disc 5 (when the fixed toothed disc 5 is meshed with the movable toothed disc 4) and the rotating member 7 to rotate in the circumferential direction. The keyway length of the internal spline is set longer, and the movable toothed disc 4 can slide in the keyway of the internal spline with the help of its external spline.

[0045] An elastic member 2 is fixedly disposed in the annular gap, and the elastic member 2 abuts against an end of the movable gear plate 4 away from the fixed gear plate 5 .

[0046] The elastic member 2 is a spring assembly, which includes relatively arranged spring fixing rings, and a plurality of springs arranged in a ring shape are fixed between the two spring fixing rings.

[0047] The spring is a rectangular spring, and two ends of the rectangular spring are respectively fixedly connected to two spring fixing rings.

[0048] The spring fixing ring is slidably inserted into the rotating member 7 , and the outer circle of the spring fixing ring is formed with an outer spline matched with the inner spline, and the spring fixing ring is spline-connected to the locking cylinder 3 .

[0049] The spring assembly is arranged on the outer periphery of the rotating member 7 by means of the through hole in the middle thereof, and under the elastic force of multiple evenly arranged springs, a stable, effective and evenly applied preload force is provided for the meshing of the toothed disc assembly. The spring of the spring assembly preferably uses a rectangular spring with a high spring rate, which can provide a large and stable elastic force, and helps the toothed disc assembly to work stably.

[0050] The structure and principle of the spline connection between the spring fixing ring and the locking cylinder 3 are the same as the spline connection between the movable gear plate 4 and the locking cylinder 3, and will not be repeated here.

[0051] One end of the locking cylinder 3 on which the elastic member 2 is arranged is fixedly connected with a spring fixed end cover 1 for fixing and restricting the elastic member 2 .

[0052] A rotating member support seat 6 is provided at the end of the rotating member 7 close to the fixed gear plate 5 .

[0053] The rotating member support seat 6 includes a supporting cylinder, in which the rotating member 7 is inserted, and a rolling bearing is embedded and fixed between the supporting cylinder and the rotating member 7.

[0054] The rotating member 7 has two ends. When the rotating member 7 is long, a rotating member support seat 6 is fixedly provided at its free end (the opposite end of the rotating member 7 where the gear plate group is provided) to improve the rotation stability (stability) of the rotating member 7.

[0055] The locking principle of the present invention is as follows: the fixed toothed disc 5 is fixed on the rotating member 7 (or rotating member or main shaft), and when the rotating member 7 rotates, it will rotate together. The movable toothed disc 4 is pressed and meshed with the fixed toothed disc 5 under the elastic force of the spring member, and the movable toothed disc 4 cannot rotate in the circumferential direction. At this time, the locking of the rotating member 7 is completed (the rotating member 7 cannot rotate). The movable toothed disc 4 transmits the torque to the locking cylinder 3 through the spline, and the locking cylinder 3 is fixed, completing the force transmission, and the movable toothed disc 4 cannot rotate. Due to safety considerations, the locking mechanism of the rotating member 7 of the present invention adopts a normally closed design, so the rotating member 7 cannot rotate under normal working conditions.

[0056] Embodiment 2

[0057] A rail grinding device comprises a locking mechanism of a rotating member 7 as described in any one of the above technical solutions; the other end of the rotating member 7 is fixedly connected to a rotating member support seat 6, a grinding fixing frame 8 is fixedly connected to the rotating member 7, and a plurality of grinding units 9 arranged in a series are fixed on the outer periphery of the grinding fixing frame 8.

[0058] The rail grinding devices are provided in two groups corresponding to the width of the rails on the rails, and a frame 10 is fixedly connected between the two groups of rail grinding devices.

[0059] When the rail grinding device is working, it moves forward along the length direction of the rail. The top surface of the rail (the surface where the rail is combined with the train roller) has defects such as cracks or other pits, and needs to be ground and maintained. When the rail grinding device moves forward, one row of grinding units 9 is tightly pressed against the top surface of the rail. The grinding stone of the grinding unit 9 rotates and grinds the rail under the action of friction, grinding off the top surface of the rail. This is passive grinding, that is, the grinding stone of the grinding unit 9 has no power drive mechanism, but only completes grinding while moving forward under the action of friction. Since the rotating part 7 is connected to the grinding fixed frame 8, the skew deviation is usually caused by the rotating part 7 not being stably locked. Therefore, a stable locking mechanism of the rotating part 7 is provided in the first embodiment. The main function of the locking mechanism of the rotating part 7 is to ensure that the rotating part 7 is locked and cannot rotate during the grinding operation, and to try to eliminate the rotation of the rotating part 7 and drive the grinding unit 9 to deviate, thereby causing damage to the top surface of the rail, and then affecting driving safety. When one row of grinding units 9 needs to be replaced and maintained, the rotating member 7 drives the grinding fixed frame 8 to rotate a certain angle, and another row of normal grinding units 9 is rotated to the top of the rail to engage with the rail and continue the grinding operation. Regarding the rotation method of the grinding unit 9, after the movable toothed disc 4 and the fixed toothed disc 5 of the toothed disc group are separated, the fixed toothed disc 5 drives the rotating member 7 to rotate a certain angle to match the position of the normal grinding unit 9.

[0060] Finally, it should be noted that the above embodiments are only preferred embodiments of the present invention to illustrate the technical solutions of the present invention, rather than limiting them, and certainly not limiting the patent scope of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention. In addition, the direct or indirect application of the technical solutions of the present invention in other related technical fields is also included in the patent protection scope of the present invention.

[0061] The names of the components represented by the reference numerals in the above text are as follows:

[0062] Spring fixed end cover 1, elastic member 2, locking cylinder 3, movable gear plate 4, fixed gear plate 5, rotating member support seat 6, rotating member 7, grinding fixed frame 8, grinding unit 9, frame body 10.

Claims

1. A locking mechanism for a rotating part, characterized in that: A fixed locking cylinder is coaxially penetrated outside the rotating part, and an annular gap is formed between the inner wall of the locking cylinder and the outer cylindrical surface of the rotating part; a toothed disc group meshingly connected under the action of a preload is arranged in the annular gap; the toothed disc group includes a movable toothed disc movable in the annular gap, a avoidance hole is opened in the middle of the movable toothed disc and is slidably penetrated on the rotating part, and a fixed toothed disc fixedly sleeved on the rotating part, and the movable toothed disc and the fixed toothed disc are connected by end face teeth; the outer cylindrical surface of the movable toothed disc and the inner wall of the locking cylinder are key connections for limiting the rotation of the movable toothed disc; the key connection is a spline connection, the inner wall of the locking cylinder is formed with an internal spline, and the outer circle of the movable toothed disc is formed with an external spline adapted to the internal spline; an elastic member is fixedly arranged in the annular gap, and the elastic member abuts against one end of the movable toothed disc away from the fixed toothed disc.

2. The locking mechanism of the rotating member according to claim 1, characterized in that: The elastic member is a spring assembly, which includes spring fixing rings arranged opposite to each other, and a plurality of springs arranged in a ring shape are fixed between the two spring fixing rings.

3. The locking mechanism of the rotating member according to claim 2, characterized in that: The spring is a rectangular spring, and two ends of the rectangular spring are respectively fixedly connected to two spring fixing rings.

4. The locking mechanism of the rotating member according to claim 3, characterized in that: The spring fixing ring is slidably inserted into the rotating member, the outer circle of the spring fixing ring is formed with an outer spline matched with the inner spline, and the spring fixing ring is spline-connected with the locking cylinder.

5. The locking mechanism of the rotating member according to claim 1, characterized in that: The end of the rotating member close to the fixed gear plate is provided with a rotating member supporting seat.

6. The locking mechanism of the rotating member according to claim 5, characterized in that: The rotating member support seat comprises a supporting cylinder, in which the rotating member is inserted, and a rolling bearing is embedded and fixed between the supporting cylinder and the rotating member.

7. A rail grinding device, characterized in that: It comprises a locking mechanism of a rotating part as claimed in any one of claims 1 to 6; the other end of the rotating part is fixedly connected to a rotating part support seat, a grinding fixing frame is fixedly connected to the rotating part, and a plurality of grinding units arranged in a series are fixed on the outer periphery of the grinding fixing frame.

8. The rail grinding device according to claim 7, characterized in that: The rail grinding devices are provided with two groups corresponding to the width of the rails on the rails, and a frame is fixedly connected between the two groups of rail grinding devices.

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