Connecting assembly for connecting roller and oiling device and oiling system

Abstract

The utility model discloses a connecting assembly for connecting a roller and an oiling device and an oiling system, and belongs to the technical field of oiling devices of finishing mills. The connecting assembly is used for connecting the roller and the oiling device, an oiling channel is formed in the roller, and conical internal threads are formed in the inner wall of the oiling channel; the connecting assembly comprises an oil nozzle and a connecting piece, the oil nozzle is in threaded connection with the connecting piece, conical external threads matched with the conical internal threads are formed in the connecting piece, the connecting piece is used for being in threaded connection with the oil injection channel, and the oil nozzle extends out of the roller and is used for being connected with an oil injection device. The connecting piece is connected with the roller through the conical threads, the conical threads have taper, so that the conical internal threads and the conical external threads have a self-tightening function when being matched, and when the conical external threads of the connecting assembly are screwed to the end position of the conical internal threads of the roller or rotated to the front of the end position of the conical internal threads, the roller can be tightened. The connecting assembly cannot be continuously screwed into the oil injection channel, and the length of the connecting assembly protruding out of the end face of the roller is guaranteed.

Description

Technical Field

[0001] The present application belongs to the technical field of oil injection devices for finishing mills, and in particular relates to a connecting assembly and an oil injection system for connecting a roller and an oil injection device. Background Art

[0002] When the finishing mill is working, the connecting assembly connecting the rolls and the oil injection device can normally transmit lubricating oil to the rolls, which is an important condition to ensure the operation of the roll bearings and roll bearing seats in the machine.

[0003] The connecting assembly is mounted on the roller, and the oil injection device supplies oil between the roller bearing and the bearing seat through the connecting assembly. Specifically, an oil injection channel is provided on the surface of the roller, and the connecting assembly is threadedly connected to the oil injection channel.

[0004] After the rolls and bearing seats are assembled, a special tool (such as a socket wrench) is required to screw the connecting assembly into the oiling channel. In the prior art, the connecting assembly, screwed continuously into the oiling channel using the special tool, results in a short protrusion of the connecting assembly from the roll end face, making it difficult to connect the oiling device to the connecting assembly and complicating roll oiling. Utility Model Content

[0005] The present application aims to at least to some extent solve the technical problem in the related art that the connecting assembly protrudes too short from the end face of the roller. To this end, the present application provides a connecting assembly and an oiling system for connecting the roller and an oiling device.

[0006] In a first aspect, an embodiment of the present application provides a connecting assembly for connecting a roller and an oil injection device, wherein an oil injection channel is provided on the roller, and a conical internal thread is provided on the inner wall of the oil injection channel, wherein the diameter of the conical internal thread decreases sequentially along the oil injection direction;

[0007] The connecting assembly includes an oil nozzle and a connecting piece, the oil nozzle is threadedly connected to the connecting piece, and the connecting piece is provided with a conical external thread adapted to the conical internal thread, and the diameter of the conical external thread decreases successively along the oil injection direction. The connecting piece is used to be threadedly connected to the oil injection channel, and the oil nozzle extends outside the rolling roller and is used to be connected to the oil injection device.

[0008] In some implementations, the specification of the conical internal thread is RC3 / 4, and the specification of the conical external thread is R3 / 4.

[0009] In some implementations, the length of the conical internal thread is 16 mm.

[0010] In some implementations, the tapered external thread has a length of 16 mm.

[0011] In some implementations, the oil injection channel has a diameter of 19 mm.

[0012] In some implementations, a sinking groove is provided on the surface of the roller, and the oil injection channel is provided on the bottom wall of the sinking groove.

[0013] In some implementations, the diameter of the sinking groove is 32 mm and the depth is 15 mm, and the sinking groove is coaxially arranged with the oil injection channel.

[0014] In some implementations, the connecting member is in a circular tubular shape, and the conical external thread is provided on the outer peripheral wall of the connecting member; the oil nozzle portion is located inside the connecting member and is threadedly connected to the inner peripheral wall of the connecting member.

[0015] In some implementations, an inner circumferential wall of the connector is provided with an internal pipe thread, the specification of which is G1 / 4; an outer circumferential wall of the nozzle is provided with an external pipe thread, the specification of which is G1 / 4A.

[0016] In the second aspect, an embodiment of the present application also provides an oil injection system, characterized in that it includes a rolling roller, an oil injection device and the connecting assembly described in the first aspect above; an oil injection channel is provided on the rolling roller, and a conical internal thread is provided on the inner wall of the oil injection channel; the oil nozzle is threadedly connected to the connecting piece, and a conical external thread adapted to the conical internal thread is provided on the connecting piece, the connecting piece is threadedly connected to the oil injection channel, the oil nozzle extends out of the rolling roller, and the oil nozzle is connected to the oil injection device.

[0017] The utility model has at least the following beneficial effects:

[0018] In the connecting assembly connecting the rolling roller and the oil injection device of the present application, the connecting part and the rolling roller are connected by a conical internal thread and a conical external thread. After such design, since the conical internal thread and the conical external thread have a taper, the conical internal thread and the conical external thread have a self-tightening effect when matched. When the conical external thread of the connecting assembly is screwed to the end of the conical internal thread of the rolling roller or before rotating to the end of the conical internal thread, the connecting assembly will not be able to continue to be screwed into the oil injection channel, thereby ensuring the length of the connecting assembly protruding from the end face of the rolling roller. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, a brief introduction will be given below to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0020] Figure 1A schematic diagram of the connection between the connecting components of the oil injection system and the rollers in one or more embodiments of the present application is shown.

[0021] Figure 2 A cross-sectional view of a roll illustrating an oil injection system according to one or more embodiments of the present application is shown.

[0022] Figure 3 A cross-sectional view of a connection assembly in one or more embodiments of the present application is shown.

[0023] Figure 4 A cross-sectional view of a grease nipple of a connection assembly in one or more embodiments of the present application is shown.

[0024] Figure 5 A cross-sectional view of a connector of a connection assembly in one or more embodiments of the present application is shown.

[0025] Figure numerals: 100 - oil injection system, 110 - roller, 110a - oil injection channel, 110b - sinking groove, 111 - conical internal thread, 120 - connecting assembly, 121 - oil nozzle, 1211 - internal thread of pipe, 122 - connecting piece, 1221 - conical external thread, 1222 - external thread of pipe. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not 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 efforts are within the scope of protection of the present invention.

[0027] It should be noted that all directional indications in the embodiments of the present invention are intended only to explain the relative positional relationships and movement between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly. In the present invention, unless otherwise specified or limited, the terms "connected" and "fixed" should be understood broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; and can mean internal communication between two components or an interaction between two components, unless otherwise specified. A person of ordinary skill in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances. In addition, the terms "first" and "second" in the present invention are for descriptive purposes only and should not be construed to indicate or imply relative importance or to implicitly specify the number of the technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that ordinary technicians in this field can implement them. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

[0028] When the finishing mill is working, the connecting assembly connecting the rolls and the oil injection device can normally transmit lubricating oil to the rolls, which is an important condition to ensure the operation of the roll bearings and roll bearing seats in the machine.

[0029] The connecting assembly is mounted on the roller, and the oil injection device supplies oil between the roller bearing and the bearing seat through the connecting assembly. Specifically, an oil injection channel is provided on the surface of the roller, and the connecting assembly is threadedly connected to the oil injection channel.

[0030] After the rolls and bearing seats are assembled, a special tool (such as a socket wrench) is required to screw the connecting assembly into the oiling channel. In the prior art, the connecting assembly, screwed continuously into the oiling channel using the special tool, results in a short protrusion of the connecting assembly from the roll end face, making it difficult to connect the oiling device to the connecting assembly and complicating roll oiling.

[0031] Theoretically, when the connecting assembly is rotated to the end of the internal threads of the oil injection channel using a dedicated tool, the connecting assembly is tightened and cannot be screwed further into the oil injection channel. However, in practice, the applicant discovered that even after the connecting assembly has been rotated to the end of the internal threads, it can still be screwed in, causing the connecting assembly to be screwed in too far, resulting in a shorter protrusion from the end face of the roller. In other words, the shorter length of the connecting assembly exposed outside the roller makes it difficult for the oil injection device to dock with the connecting assembly to complete the oil injection operation.

[0032] It should be noted that in the related art, if the connecting component is not further screwed after being rotated to the end of the internal thread, the connecting component is likely to loosen, and the connecting component is likely to fall off the roller, and there is a risk of oil leakage.

[0033] It should be noted that the oiling device is typically equipped with a quick-change connector. When docking with the connecting assembly, the quick-change structure needs to be pulled back to mate the quick-change connector with the connecting assembly. Similarly, when separating the oiling device from the quick-change connector, the quick-change connector also needs to be pulled back to detach the quick-change structure from the connecting assembly. The connecting assembly's short length outside the roll requires the quick-change connector to be partially located inside the roll, resulting in limited space for disassembly and assembly, making it difficult to dock the oiling device with the connecting assembly.

[0034] In summary, in the related art, the connection assembly has a technical problem of a short protrusion from the end face of the roller. The embodiment of the present application provides a connection assembly connecting the roller and the oil injection device, which can at least to some extent solve the technical problem of the short protrusion from the end face of the roller.

[0035] The present application is described below with reference to specific embodiments and with reference to the accompanying drawings:

[0036] like Figure 1 As shown, a connecting assembly 120 (hereinafter referred to as connecting assembly 120) connecting the roller and the oiling device is used to connect the roller 110 and the oiling device. The roller 110 is provided with an oiling channel 110a, and the inner wall of the oiling channel 110a is provided with a tapered internal thread 111. The diameter of the tapered internal thread 111 decreases along the oiling direction. Connecting assembly 120 includes an oil nozzle 121 and a connecting member 122. The oil nozzle 121 is threadedly connected to the connecting member 122. The connecting member 122 is provided with a tapered external thread 1221 that matches the tapered internal thread 111. The diameter of the tapered external thread 1221 decreases along the oiling direction. The connecting member 122 is threadedly connected to the oiling channel 110a. The oil nozzle 121 extends outside the roller 110 and is used to connect to the oiling device.

[0037] The oil nozzle 121 is mounted on the connecting member 122, and the connecting member 122 is mounted in the oil injection channel 110a. Generally, in order to ensure lubrication effect, the diameter of the oil injection channel 110a is relatively large, and the nominal diameter of the conical internal thread 111 processed thereon is also relatively large.

[0038] When filling oil, the oil nozzle 121 is easily damaged and often needs to be replaced. The oil nozzle 121 is usually purchased on the market. If the oil nozzle 121 is to be directly installed in the oil filling channel 110a, the oil nozzle 121 needs to be non-standard designed and specially sized. The production cost is high and the subsequent replacement cost is also high.

[0039] After the present application is designed in this way, the oil nozzle 121 and the oil injection channel 110a are connected by the connecting piece 122. The internal thread of the connecting piece 122 for installing the oil nozzle 121 is set to be compatible with the external thread of the existing oil nozzle 121 on the market, so that the oil nozzle 121 can be purchased directly from the market without special processing. When the oil nozzle 121 is damaged, the oil nozzle 121 can be directly replaced, which helps to reduce the replacement cost of the oil nozzle 121 and thus reduce the production cost of the enterprise.

[0040] The connecting member 122 of the connecting assembly 120 is provided with a conical external thread 1221 adapted to the conical internal thread 111 . The connecting member 122 is threadedly connected to the oil injection channel 110 a , and the oil nozzle 121 is used to connect to the oil injection device.

[0041] Specifically, the conical external thread 1221 of the connecting member 122 is threadably matched with the conical internal thread 111 on the inner wall of the oil injection channel 110 a , so that the connecting assembly 120 is threadedly connected to the oil injection channel 110 a .

[0042] Connecting assembly 120 is mounted within oil injection passage 110a. Its function is to connect the oil injection device and oil injection passage 110a during oil injection, allowing lubricating oil to be discharged through the oil injection device and then enter oil injection passage 110a through connecting assembly 120. The oil injection device is used to inject lubricating oil into connecting assembly 120. During oil injection, the oil injection device must be connected to the oil nozzle 121 of connecting assembly 120. The oil injection device may include components such as an oil pump, oil pipe, and a quick-connect structure.

[0043] The applicant of this application has measured various data of the oil injection channel 110a, connecting components, etc. in the relevant technology and found that the reason why the connecting component 120 continues to be screwed inward is not because the internal thread length of the oil injection channel 110a is too long, nor because the external thread length on the connecting component 120 is too short, etc., which is an unreasonable dimensional design.

[0044] After extensive testing and research, the applicant of this application creatively discovered that the reason why the connecting component 120 can continue to be screwed into the oil injection channel 110a after the connecting piece 122 of the connecting component 120 is rotated to the end of the internal thread is because the internal thread of the oil injection channel 110a is an ordinary thread, and the thread on the connecting component 120 that matches the oil injection channel 110a is also an ordinary thread, which causes the connecting component 120 to go further inward the more it is screwed. If the internal thread of the oil injection channel 110a is set as a conical internal thread 111, and the external thread of the connecting component 120 is set as a conical external thread 1221, since the conical internal thread 111 and the conical external thread 1221 have a taper, the conical internal thread 111 and the conical external thread 1221 have a self-tightening effect when they match. When the connecting component 120 is screwed into the oil injection channel 110a for a certain distance, the connecting component 120 can no longer be screwed into the oil injection channel 110a.

[0045] The above problems will not occur.

[0046] It should be noted that, as described above, for those skilled in the art, theoretically, when the connecting assembly 120 is rotated to the end of the internal thread of the oil injection channel 110a using a dedicated tool, the connecting assembly 120 cannot be further screwed into the oil injection hole. In other words, those skilled in the art would not expect or find it difficult to expect that the reason why the connecting assembly 120 can continue to be screwed into the oil injection hole is due to an unreasonable selection of the connecting assembly 120 and the thread type on the connecting assembly 120. Therefore, with respect to the present application, the applicant has discovered that the reason why the connecting assembly 120 can continue to be screwed into the oil injection hole is precisely due to an unreasonable selection of the thread type on the oil injection channel 110a and the connecting assembly 120, and the present application has a certain degree of inventiveness.

[0047] After the present application is designed in this way, when the conical external thread 1221 is screwed to the end of the conical internal thread 111 or is screwed to a point before the end of the conical internal thread 111, the connecting component 120 will not be able to continue to be screwed into the oil injection channel 110a, and the problem in the related art that the connecting component 120 can be continuously screwed into the oil injection channel 110a with the help of special tools will not occur, thereby ensuring the length of the connecting component protruding from the end face of the roller 110.

[0048] The specific specifications of the conical internal thread 111 and the conical external thread 1221 are not limited in this application, and the user can design the oil injection channel 110a and the connecting assembly 120 according to their size adaptability.

[0049] like Figure 2 and Figure 3 As shown, in some embodiments, the specification of the conical internal thread 111 is RC3 / 4, and the specification of the conical external thread 1221 is R3 / 4.

[0050] RC and R are thread designations. RC stands for tapered internal thread 111, and R stands for tapered external thread 1221. 3 / 4 represents the thread's engineering diameter, expressed in inches. It should be noted that the major diameter, minor diameter, thread angle, pitch, taper, pitch, and thread height of RC3 / 4 and R3 / 4 are well known to those skilled in the art and are not detailed here.

[0051] The lengths of the conical internal thread 111 and the conical external thread 1221 are not limited in this application, and the user can make an adaptive design based on the size of the connecting component 120.

[0052] like Figure 2 As shown, in some embodiments, the length of the conical internal thread 111 is 16 mm.

[0053] like Figure 3 As shown, in some embodiments, the length of the tapered external thread 1221 is 16 mm.

[0054] With this design, after the connecting assembly 120 is screwed into the oil injection channel 110 a by 16 mm, the connecting assembly 120 cannot be further screwed into the oil injection channel 110 a.

[0055] The diameter of the oil injection channel 110a is not limited in this application, and the user can make an adaptive design according to the actual situation. In some embodiments, the diameter of the oil injection channel 110a is 19 mm.

[0056] like Figure 2 As shown, in some embodiments, a sinking groove 110 b is opened on the surface of the roller 110 , and the oil injection channel 110 a is opened on the bottom wall of the sinking groove 110 b .

[0057] In some embodiments, the diameter of the sinking groove 110b is 32 mm and the depth is 15 mm. The sinking groove 110b is coaxially arranged with the oil injection channel 110a.

[0058] like Figure 3 As shown, in some embodiments, the connecting member 122 is in a cylindrical shape, and a conical external thread 1221 is provided on the outer peripheral wall of the connecting member 122 ; the oil nozzle 121 is partially located inside the connecting member 122 and is threadedly connected to the inner peripheral wall of the connecting member 122 .

[0059] It should be noted that the structure of the nozzle 121 is well known to those skilled in the art and will not be described in detail here. In these embodiments, the outer peripheral wall of one end of the nozzle 121 is provided with an external thread, and the end of the nozzle 121 provided with the external thread is located within the connector 122 and is threadedly connected to the internal thread on the inner wall of the connector 122.

[0060] like Figure 4 and Figure 5As shown, in some embodiments, the inner wall of the connecting member 122 is provided with an internal pipe thread 1211, and the specification of the internal pipe thread 1211 is G1 / 4; the outer wall of the oil nozzle 121 is provided with an external pipe thread 1222, and the specification of the external pipe thread 1222 is G1 / 4A.

[0061] It should be noted that the external pipe thread 1222 provided on the outer peripheral wall of the oil nozzle 121 and the tapered external thread 1221 provided on the outer peripheral wall of the connecting member 122 have the same thread direction, both being left-hand threads or both being right-hand threads.

[0062] Based on the same inventive concept, the embodiment of the present application also provides an oiling system 100, comprising a roller 110, an oiling device, and the aforementioned connecting assembly 120. The roller 110 is provided with an oiling channel 110a, the inner wall of which is provided with a conical internal thread 111. The connecting assembly 120 comprises an oil nozzle 121 and a connecting member 122. The oil nozzle 121 is threadedly connected to the connecting member 122. The connecting member 122 is provided with a conical external thread 1221 that matches the conical internal thread 111. The connecting member 122 is threadedly connected to the oiling channel 110a. The oil nozzle 121 extends out of the roller 110 and is connected to the oiling device.

[0063] The structure of the roller 110 is well known to those skilled in the art and will not be described in detail herein. The oiling device may be a grease pump or the like.

[0064] Since the oil injection system 100 includes the above-mentioned connection structure 100, it naturally has all the beneficial effects of the connection component 120, which will not be described in detail here.

[0065] When using the connecting assembly 120 of the present application, the oil nipple 121 is first screwed into the connecting piece 122, connecting the nipple 121 and the connecting piece 122 to form a whole, namely the connecting assembly 120. Then, using a tool such as a socket wrench, a sleeve is placed on the oil nipple 121, and the sleeve is screwed so that the connecting piece 122 of the connecting assembly 120 is gradually screwed into the oil injection channel 110a, until the tapered external thread 1221 of the connecting assembly 120 is screwed to the end of the tapered internal thread 111 of the roller 110, and the connecting assembly 120 can no longer be screwed inward.

[0066] After adopting the present application, compared with the related technology, the connecting component 120 of the present application obviously protrudes from the end face of the roller 110, and the length of the connecting component 120 protruding from the end face of the roller 110 is longer, which facilitates the connection between the oil injection device and the connecting component 120.

[0067] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations 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 any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification.

[0068] In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that ordinary technicians in this field can implement them. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0069] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and intent of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A connecting assembly (120) for connecting a roller and an oiling device, characterized in that: An oil injection channel (110a) is provided on the roller (110), and a conical internal thread (111) is provided on the inner wall of the oil injection channel (110a), wherein the diameter of the conical internal thread (111) decreases sequentially along the oil injection direction; The connecting assembly (120) comprises an oil nozzle (121) and a connecting piece (122), wherein the oil nozzle (121) is threadedly connected to the connecting piece (122), and the connecting piece (122) is provided with a conical external thread (1221) adapted to the conical internal thread (111), wherein the diameter of the conical external thread (1221) decreases successively along the oil injection direction, and the connecting piece (122) is used for being threadedly connected to the oil injection channel (110a), and the oil nozzle (121) extends outside the roller (110) and is used for being connected to the oil injection device.

2. The connecting assembly (120) for connecting a roller and an oil injection device according to claim 1, characterized in that: The specification of the conical internal thread (111) is RC3 / 4, and the specification of the conical external thread is R3 / 4.

3. The connecting assembly (120) for connecting a roller and an oil injection device according to claim 1, characterized in that: The length of the conical internal thread (111) is 16 mm.

4. The connecting assembly (120) for connecting a roller and an oil injection device according to claim 3, characterized in that: The length of the conical external thread (1221) is 16 mm.

5. The connecting assembly (120) for connecting a roller and an oil injection device according to claim 1, characterized in that: The diameter of the oil injection channel (110a) is 19 mm.

6. The connecting assembly (120) for connecting a roller and an oil injection device according to claim 1, characterized in that: A sinking groove (110b) is provided on the surface of the roller (110), and the oil injection channel (110a) is provided on the bottom wall of the sinking groove (110b).

7. The connecting assembly (120) for connecting a roller and an oil injection device according to claim 6, characterized in that: The diameter of the sinking groove (110b) is 32 mm and the depth is 15 mm. The sinking groove (110b) is coaxially arranged with the oil injection channel (110a).

8. The connecting assembly (120) for connecting a roller and an oil injection device according to any one of claims 1 to 7, characterized in that: The connecting piece (122) is in the shape of a circular tube, and the conical external thread (1221) is provided on the outer peripheral wall of the connecting piece (122); the oil nozzle (121) is partially located inside the connecting piece (122) and is threadedly connected to the inner peripheral wall of the connecting piece (122).

9. The connecting assembly (120) for connecting a roller and an oil injection device according to claim 8, characterized in that: The inner peripheral wall of the connecting piece (122) is provided with an internal pipe thread (1211), and the specification of the internal pipe thread (1211) is G1 / 4; the outer peripheral wall of the oil nozzle (121) is provided with an external pipe thread (1222), and the specification of the external pipe thread (1222) is G1 / 4A.

10. An oil injection system (100), characterized in that: The invention comprises a rolling roller (110), an oil injection device and a connecting assembly (120) according to any one of claims 1 to 9; an oil injection channel (110a) is provided on the rolling roller (110), and a conical internal thread (111) is provided on the inner wall of the oil injection channel (110a); the oil nozzle (121) is threadedly connected to the connecting member (122), and a conical external thread (1221) adapted to the conical internal thread (111) is provided on the connecting member (122); the connecting member (122) is threadedly connected to the oil injection channel (110a), the oil nozzle (121) extends out of the rolling roller (110), and the oil nozzle (121) is connected to the oil injection device.

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