Gear marking device

Abstract

The utility model relates to the technical field of locomotive maintenance tools, in particular to a gear scribing device which comprises a connecting rod, a first scribing rod, a second scribing rod and a positioning rod are sequentially arranged on the connecting rod, the first scribing rod and the second scribing rod are used for being connected with a scribing pen for scribing, and a positioning piece is arranged at the end, away from the connecting rod, of the positioning rod. And the positioning piece is used for being clamped with a boss at the end of the gear for positioning, so that the inner hole surface of the gear is quickly marked, and the marking accuracy can be effectively improved.

Description

Technical Field

[0001] This application relates to the technical field of locomotive maintenance tools, and particularly to a gear scribing device. Background Art

[0002] The locomotive gear and the axle have an interference fit relationship with a taper, and the interference amount between the two needs to be measured and determined from a certain position on the inner hole surface of the gear.

[0003] Currently, the measurement of the interference amount between the locomotive gear and the axle is generally carried out by an operator holding a tape measure or a steel ruler by hand. Specifically, during the measurement, the operator needs to mark multiple points on the same circumference with a tape measure or a steel ruler, and generally needs to mark at least two circumferences at different positions, then scribe lines according to the marks, and measure according to the scribed lines.

[0004] Such an operation method not only has poor accuracy, but also has complicated scribing steps and low efficiency. Utility Model Content

[0005] This application provides a gear scribing device to solve the problems of poor accuracy and low efficiency in scribing the locomotive gear during the measurement of the interference amount between the locomotive gear and the axle.

[0006] To solve the above problems, this application adopts the following technical solutions:

[0007] A gear scribing device for gear scribing, including a connecting rod, on which a first scribing rod, a second scribing rod and a positioning rod are sequentially arranged. The first scribing rod and the second scribing rod are used to connect a scribing pen for scribing. A positioning member is arranged at one end of the positioning rod away from the connecting rod, and the positioning member is used to be clamped with a boss at the end of the gear for positioning.

[0008] In some possible designs, it further includes at least two adjusting members, and at least two of the first scribing rod, the second scribing rod, and the positioning rod are each connected to one of the adjusting members, so as to change the positions of at least two of the first scribing rod, the second scribing rod, and the positioning rod on the connecting rod through the adjusting members.

[0009] In some possible designs, the first scribing rod is fixedly connected to one end of the connecting rod, and the second scribing rod and the positioning rod are connected to the connecting rod through the adjusting members.

[0010] In some possible designs, sleeves are provided at one end of the second scribing rod and the positioning rod. The sleeves are sleeved outside the connecting rod. The adjusting member is a first bolt, and a first threaded hole for cooperating with the first bolt is provided on the sleeve, so as to limit the relative position between the sleeve and the connecting rod after the first bolt is screwed into the first threaded hole and its end abuts against the connecting rod.

[0011] In some possible designs, both the first scribing rod and the second scribing rod include receiving cavities for receiving a scribing pen. The receiving cavities are open at one end away from the connecting rod for the end of the scribing pen to extend out. At least one locking member is further provided on the first scribing rod and the second scribing rod to limit the position of the scribing pen in the receiving cavity through the locking member.

[0012] In some possible designs, the locking member is a second bolt, and two second threaded holes for cooperating with the second bolt are provided on the wall of the receiving cavity to limit the position of the scribing pen after the second bolt is screwed into the second threaded hole and abuts against the scribing pen.

[0013] In some possible designs, the positioning member is a bearing.

[0014] In some possible designs, the positioning member includes a positioning block connected to the positioning rod and a ball rotatably connected to the positioning block. The ball is used for rolling contact with the boss of the gear.

[0015] In some possible designs, at least part of the positioning rod is provided with an external thread, and the positioning block is threadedly connected to the positioning rod.

[0016] In some possible designs, the distance between the end face of the positioning member close to the connecting rod and the connecting rod is less than or equal to 300 mm.

[0017] Advantages of the present application: The gear scribing device provided by the present application is provided with a connecting rod, and a first scribing rod, a second scribing rod and a positioning rod are provided on the connecting rod. The first scribing rod and the second scribing rod are used to place a scribing pen for scribing. The positioning rod is stuck on the boss at the end of the gear. The positioning member is used to limit the positions of the first scribing rod and the second scribing rod when moving the connecting rod for scribing, so that the scribing pen moves along the same circumference of the inner hole surface of the gear for scribing, thereby realizing rapid scribing, improving the scribing efficiency, and effectively improving the accuracy of scribing. In addition, the operation is relatively simple, and the production cost of the device is also relatively low. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings here are incorporated into the specification and constitute a part of this specification, showing embodiments consistent with the present application, and are used together with the specification to explain the principles of the present application. Obviously, the accompanying drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0019] Figure 1 is the structure of the existing locomotive gear;

[0020] Figure 2 is the structure of the gear scribing device provided by the present application;

[0021] Figure 3 is Figure 2 a schematic structural diagram of the positioning rod in

[0022] Figure 4 is Figure 2 another schematic structural diagram of the positioning member in

[0023] Figure 5 is Figure 2 a schematic diagram of the separated state of the first scribing rod and the scribing pen in

[0024] Explanation of reference numerals:

[0025] 001 - boss; 002 - inner hole;

[0026] 100 - connecting rod; 200 - first scribing rod; 300 - second scribing rod; 400 - positioning rod; 410 - positioning member; 420 - external thread; 430 - positioning block; 440 - ball; 450 - sleeve; 500 - scribing pen; 600 - adjusting member; 700 - locking member.

[0027] Through the above accompanying drawings, specific embodiments of the present application have been shown, and there will be more detailed descriptions hereinafter. These drawings and textual descriptions are not intended to limit the scope of the concept of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. Detailed embodiments

[0028] First of all, those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present application and are not intended to limit the protection scope of the present application. Those skilled in the art can make adjustments according to needs to adapt to specific application scenarios.

[0029] Secondly, it should be noted that in the description of this application, unless otherwise clearly specified and limited, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, or an indirect connection through an intermediate medium, or it can be the internal connection of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0030] Then, it should also be noted that in the description of this application, the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of this application.

[0031] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of this application, unless otherwise stated, the meaning of "a plurality" is two or more.

[0032] The locomotive gears used in multiple unit trains, freight locomotives, etc. and the axles are basically in an interference fit relationship with a taper, and the interference amount between the gear and the axle is generally measured from the inner hole surface of the gear at 36 mm and 166 mm away from the large end face.

[0033] During measurement, it is necessary to draw lines on two corresponding circumferences of the inner hole surface of the gear at two large end faces. If there is a deviation in the positioning of these two circumferences, the measured interference amount data will be inaccurate. If the interference amount between the gear and the axle is less than the standard interference amount, it will cause the phenomenon of gear idling when the train is running under load. If the interference amount between the gear and the axle is greater than the standard interference amount, it will cause damage and scrapping of both when the gear and the axle are assembled, which will not only cause greater economic losses, but also have an adverse impact on the running safety of the train.

[0034] In order to avoid the above problems, this application provides a gear line marking device, which can draw lines on two circumferences of the inner hole surface of the gear at the same time, not only with high positioning accuracy, but also effectively improving the line marking efficiency.

[0035] To make the objectives, technical solutions, and advantages of this application clearer, the following will describe the technical solutions in the embodiments of this application in more detail with reference to the accompanying drawings in the preferred embodiments of this application. In the drawings, the same or similar reference numerals represent the same or similar components or components with the same or similar functions from beginning to end.

[0036] The gear scribing device provided in this embodiment is mainly applied to scribing locomotive gears similar to Figure 1 to measure the interference amount between the gear and the axle. As Figure 1 shown, an inner hole 002 for connecting with the axle is provided in the middle of the gear, and a boss 001 is provided on one end face of the gear. It can be understood that the gear scribing device provided in this embodiment is not only applicable to the gears in Figure 1 , but any gear with a boss 001 and an inner hole 002 as in Figure 1 can be used.

[0037] As Figure 2 shown, the gear scribing device provided in this embodiment includes a connecting rod 100. Among them, the cross-section of the connecting rod 100 can be of any shape, such as circular, polygonal, elliptical, etc., as long as it is convenient for the staff to hold and operate.

[0038] A first scribing rod 200, a second scribing rod 300, and a positioning rod 400 are provided on the connecting rod 100. A positioning member 410 is provided at one end of the positioning rod 400 away from the connecting rod 100. The positioning member 410 is used to be clamped with the boss 001 at the end of the gear for positioning. The first scribing rod 200 and the second scribing rod 300 are used to connect the scribing pen 500 for scribing. Since the positioning rod 400 is clamped on the boss 001 at the end of the gear, and scribing needs to be performed on the inner hole 002 surface of the gear, the first scribing rod 200, the second scribing rod 300, and the positioning rod 400 are arranged on the connecting rod 100 in sequence.

[0039] Among them, the first scribing rod 200 and the second scribing rod 300 can be of any shape, as long as they can fix the scribing pen 500 and the scribing pen 500 does not shake during the scribing process. This embodiment does not limit it here.

[0040] It can be understood that the first scribing rod 200, the second scribing rod 300, the positioning rod 400 and the connecting rod 100 can be detachably connected or fixedly connected.

[0041] If the first scribing rod 200, the second scribing rod 300, the positioning rod 400 and the connecting rod 100 are fixedly connected, the positions of the three on the connecting rod 100 can be designed according to the size of a specific gear, that is, when the positioning member 410 just engages with the boss 001 at the end of the gear, the scribing pens 500 fixed on the first scribing rod 200 and the second scribing rod 300 are just at the required scribing positions.

[0042] If the first scribing rod 200, the second scribing rod 300, the positioning rod 400 and the connecting rod 100 are detachably connected, multiple connection points can be set, so that when gears of different sizes are used, the corresponding first scribing rod 200, second scribing rod 300 and positioning rod 400 can be connected.

[0043] When using the gear scribing device of this embodiment for scribing, the positioning member 410 can be directly engaged with the boss 001 at the end of the gear. At this time, the scribing pens 500 on the first scribing rod 200 and the second scribing rod 300 are exactly at the positions on the inner surface of the gear inner hole 002 where scribing is required. At this time, only need to hold the connecting rod 100 and slowly move the connecting rod 100 along the boss 001 on the gear end face, then the scribing pens 500 can draw a circular ring on the same circumference of the gear inner hole 002 surface. The whole process takes extremely short time. After being proficient in operation, it can even be drawn within 5 seconds. Compared with the traditional method of scribing with the assistance of a tape measure or a steel ruler, it is not only simple to operate, but also greatly improves the efficiency, and the accuracy is also effectively improved, which helps to eliminate the potential safety hazards caused by the interference fit between the gear and the axle not meeting the standard. At the same time, the gear scribing device of this embodiment has a simple structure and is convenient for production. In addition, the only thing that is consumed relatively quickly during use is only the scribing pen 500, and the use cost is also low.

[0044] In addition, in order to meet the usage requirements of conventional locomotive gears, the linear distance between the end face of the positioning member 410 close to one end of the connecting rod 100 and the connecting rod 100 needs to be less than or equal to 300 mm, so that when the positioning member 410 engages with the boss 001 of the gear, one end of the connecting rod 100 provided with the first scribing rod 200 and the second scribing rod 300 can smoothly insert into the inner hole 002 of the gear and can smoothly rotate along the boss 001 of the gear, so that the scribing pen 500 scribes on the inner hole 002 surface of the gear.

[0045] In some possible embodiments, the gear scribing device further includes at least two adjusting members 600. At least two of the first scribing rod 200, the second scribing rod 300, and the positioning rod 400 are each connected to an adjusting member 600, that is, all three can be connected to the adjusting member 600, but at least two are connected to the adjusting member 600. By the adjusting member 600, the positions of at least two of the first scribing rod 200, the second scribing rod 300, and the positioning rod 400 on the connecting rod 100 can be changed, so as to correspondingly adjust the distances between the first scribing rod 200, the second scribing rod 300, and the positioning rod 400 according to the changes in the size of the gear or the measurement position, so as to adapt to the measurement requirements.

[0046] Exemplarily, the first scribing rod 200 is fixed to one end of the connecting rod 100, and the second scribing rod 300 and the positioning rod 400 are connected to the connecting rod 100 through the adjusting member 600. The first scribing rod 200 is located at one end of the connecting rod 100, and the distance between the second scribing rod 300 and the first scribing rod 200 is adjustable, and the distance between the second scribing rod 300 and the positioning rod 400 is adjustable. On the one hand, if the gear is placed on the platform, then the connecting rod 100 will not affect the penetration depth of the first scribing rod 200, so that the scribing position of the first scribing rod 200 is more flexible. On the other hand, only two adjusting members 600 need to be provided, and the structure of the gear scribing device is also simpler.

[0047] Further, when only the second scribing rod 300 and the positioning rod 400 are connected to the connecting rod 100 through the adjusting member 600, sleeves 450 are provided at one ends of the second scribing rod 300 and the positioning rod 400. The sleeves 450 are sleeved outside the connecting rod 100. The adjusting member 600 is a first bolt, and the sleeves 450 are provided with first threaded holes matching the first bolt. After the first bolt is screwed into the first threaded hole and the end abuts against the connecting rod 100, the relative positions of the sleeves 450 and the connecting rod 100 are restricted, so as to prevent the second scribing rod 300 and the positioning rod 400 from sliding relative to the connecting rod 100 during use.

[0048] During use, the tip of the scribing pen 500 on the first scribing rod 200 can be made to stay on the circumference to be scribed, then the position of the second scribing rod 300 is adjusted by the adjusting member 600 to make the tip of the scribing pen 500 stay at the corresponding position, and then the position of the positioning rod 400 is adjusted by the adjusting member 600 to make the positioning member 410 engage with the boss 001 of the gear, and then scribing can be carried out.

[0049] Such a setting method not only enables the second scribing rod 300 and the positioning rod 400 to stay at any position of the connecting rod 100, making the position adjustment of the two more flexible, but also has a simple structure, low use difficulty, no threshold, and is beneficial for the staff to operate.

[0050] It can be understood that the adjusting member 600 can also be any other structure capable of connecting the connecting rod 100 with the second scribing rod 300 and the positioning member 410, and the present embodiment does not limit it here. For example, a plurality of card slots can be sequentially arranged on the connecting rod 100, and clamps are arranged at the ends of the second scribing rod 300 and the positioning rod 400. When adjusting the position, the position where the clamp is inserted can be changed.

[0051] In some possible implementation manners, please refer to Figure 5 As shown, both the first scribing rod 200 and the second scribing rod 300 include receiving cavities for receiving the scribing pen 500. The receiving cavities are open at one end away from the connecting rod 100 for the end of the scribing pen 500 to extend out. At least one locking member 700 is further arranged on the first scribing rod 200 and the second scribing rod 300 to limit the position of the scribing pen 500 in the receiving cavity through the locking member 700.

[0052] It can be understood that the inner diameter of the receiving cavity can be adapted to the outer diameter of the scribing pen 500 to make the position of the pen tip more accurate.

[0053] Such a setting method not only facilitates the replacement of the new scribing pen 500, but also enables the insertion depth of the scribing pen 500 in the receiving cavity to be adjustable, so as to change the distance between the pen tip of the scribing pen 500 and the connecting rod 100, and to adapt to the scribing requirements of a variety of different gears when the position of the positioning member 410 remains unchanged.

[0054] It can be understood that one or more locking members 700 can be provided, as long as the scribing pen 500 can be fixed to prevent the scribing pen 500 from shaking during use. The present embodiment does not limit it here.

[0055] Exemplarily, the locking member 700 is a second bolt, and two locking members 700 are provided. Two second threaded holes for cooperating with the second bolt are provided on the cavity wall of the receiving cavity. After the second bolt is screwed into the second threaded hole and abuts against the scribing pen 500, the position of the scribing pen 500 is restricted to prevent the scribing pen 500 from shaking.

[0056] Specifically, the two locking members 700 and the two second threaded holes can be sequentially arranged along the extending direction of the receiving cavity, so as to fix the scribing pen 500 from two different positions to improve the fixing effect of the scribing pen 500.

[0057] During use, the positioning member 410 is engaged with the boss 001 of the gear, and then the position of the scribing pen 500 in the receiving cavity is adjusted through the locking member 700, so that the pen tips of the scribing pens 500 on the first scribing rod 200 and the second scribing rod 300 stay at the corresponding positions on the inner surface of the inner hole 002 of the gear, and then scribing can be performed.

[0058] It can be understood that the locking member 700 can also be of other structures, such as a clamp or the like, as long as it can loosen the marking pen 500 when the position of the marking pen 500 needs to be adjusted or the marking pen 500 needs to be replaced, and can fix the marking pen 500 when the marking pen 500 needs to be used. This embodiment does not limit it here.

[0059] In some possible implementation manners, the positioning member 410 is a bearing. The inner ring of the bearing is connected to the positioning rod 400, and the outer ring can rotate relative to the inner ring. When the positioning member 410 is clamped with the annular boss 001 at the end of the gear, one end of the bearing is stuck outside the boss 001. At this time, the outer ring of the bearing contacts the end face of the gear. When marking, the positioning member 410 needs to move along the annular boss 001 so that the marking pen 500 marks on the inner hole 002 surface of the gear. At this time, the outer ring of the gear can rotate as the positioning member 410 moves, reducing the friction force and improving the smoothness of the movement of the positioning member 410.

[0060] In some possible implementation manners, please refer to Figure 3 and Figure 4 As shown, the positioning member 410 includes a positioning block 430 connected to the positioning rod 400 and a ball 440 rotatably connected to the positioning block 430. The ball 440 is used for rolling contact with the boss 001 of the gear, and the size of the positioning block 430 can be slightly smaller, that is, it is only clamped outside the boss 001, and its bottom does not contact the end face of the gear.

[0061] Among them, the positioning block 430 can be of any shape, such as square, circular, oval, etc., as long as it can be clamped with the boss 001. This embodiment does not limit it here.

[0062] Exemplarily, the positioning block 430 includes a first housing and a second housing. An installation cavity for accommodating the ball 440 is formed between the second housing and the first housing. At the same time, a plurality of through holes for partially extending the ball 440 to the outside of the second housing are provided on the second housing, so that when the positioning block 430 is clamped with the boss 001 at the end of the gear, the ball 440 contacts the side of the boss 001 away from the inner hole 002 surface. When pulling the positioning member 410 to move along the boss 001, the ball 440 will rotate, reducing the resistance of the movement of the positioning member 410. It not only has a simple structure, but also is more convenient to use and maintain.

[0063] In addition, to facilitate the adjustment of the position of the positioning member 410 to adapt it to gears of different specifications, the positioning rod 400 can be provided with external threads 420 at least partially. The positioning block 430 is threadedly connected to the positioning rod 400. Thus, by screwing the positioning block 430, the positioning block 430 can move along the part of the positioning rod 400 provided with external threads 420, which can not only adjust the position of the positioning block 430 relative to the connecting rod 100, but also prevent the positioning block 430 from automatically moving during use.

[0064] It can be understood that the positioning rod 400 generally forms a threaded section for cooperating with the positioning block 430 by providing external threads 420 at one end away from the connecting rod 100, so that the positioning block 430 can adjust its position on this threaded section. And in some special cases, or when the positioning block 430 is damaged, it is also convenient to disassemble the positioning block 430 from the positioning rod 400.

[0065] In addition, the positioning rod 400 and the positioning block 430 can also be detachably connected in other ways, such as by bolts or snap connection between the two. This embodiment does not limit it here.

[0066] In the description of this specification, the descriptions with reference to terms such as "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0067] In addition, for convenient holding, an anti-slip handle can also be added to the connecting rod at the end away from the first marking rod.

[0068] It can be understood that the various numerical numbers involved in the embodiments of the present application are only for the convenience of description and are not used to limit the scope of the embodiments of the present application.

[0069] So far, the technical solutions of the present application have been described in combination with the preferred embodiments shown in the drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present application is obviously not limited to these specific embodiments. Without departing from the principle of the present application, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present application.

Claims

1. A gear scribing device, characterized in that: It includes a connecting rod, on which a first marking rod, a second marking rod and a positioning rod are sequentially arranged. The first marking rod and the second marking rod are used to connect a marking pen for marking. The positioning rod is provided with a positioning piece at one end away from the connecting rod. The positioning piece is used to engage with a boss at the end of the gear for positioning.

2. The gear scribing device according to claim 1, characterized in that: It also includes at least two adjusting parts, and at least two of the first marking rod, the second marking rod, and the positioning rod are each connected to one of the adjusting parts, so that the positions of at least two of the first marking rod, the second marking rod, and the positioning rod on the connecting rod can be changed through the adjusting parts.

3. The gear scribing device according to claim 2, characterized in that: The first marking rod is fixedly connected to one end of the connecting rod, and the second marking rod and the positioning rod are connected to the connecting rod through the adjusting member.

4. The gear scribing device according to claim 3, characterized in that: The second marking rod and the positioning rod are both provided with a sleeve at one end, and the sleeve is sleeved on the outside of the connecting rod. The adjusting member is a first bolt, and the sleeve is provided with a first threaded hole that cooperates with the first bolt to limit the relative position of the sleeve and the connecting rod after the first bolt is screwed into the first threaded hole and the end thereof is pressed against the connecting rod.

5. The gear scribing device according to claim 1, characterized in that: The first marking rod and the second marking rod each include a housing cavity for accommodating a marking pen, the housing cavity is arranged away from the opening at one end of the connecting rod so that the end of the marking pen can extend out, and at least one locking piece is also provided on the first marking rod and the second marking rod to limit the position of the marking pen in the housing cavity through the locking piece.

6. The gear scribing device according to claim 5, characterized in that: The locking member is a second bolt, and two second threaded holes for cooperating with the second bolt are arranged on the cavity wall of the accommodating cavity, so as to limit the position of the marking pen after the second bolt is screwed into the second threaded hole and pressed against the marking pen.

7. The gear scribing device according to any one of claims 1 to 6, characterized in that: The positioning member is a bearing.

8. The gear scribing device according to any one of claims 1 to 6, characterized in that: The positioning member comprises a positioning block connected to the positioning rod and a ball rotatably connected to the positioning block, and the ball is used for rolling contact with the boss of the gear.

9. The gear scribing device according to claim 8, characterized in that: The positioning rod is at least partially provided with external threads, and the positioning block is threadedly connected to the positioning rod.

10. The gear scribing device according to any one of claims 1 to 6, characterized in that: The distance between the end surface of the positioning member close to one end of the connecting rod and the connecting rod is less than or equal to 300 mm.

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