Guiding method for gear engagement

Abstract

The invention belongs to the technical field of composite material preparation, and particularly relates to a gear meshing guiding method, a gear comprises a transmission gear and a guiding gear, two ends of a tooth crest of each tooth of the guiding gear are subjected to secondary chamfering processing, and the processed tooth crest is changed into a sharp corner structure from an original arc tooth crest surface. The transmission gears comprise a driving transmission gear and a driven transmission gear which have the same parameters, the guide gears comprise a main guide gear and an auxiliary guide gear which have the same parameters, the driving transmission gear and the main guide gear are coaxially mounted, and the driven transmission gear and the auxiliary guide gear are coaxially mounted; the guiding method comprises the following steps that S1, in the meshing process of the driving transmission gear and the driven transmission gear, the tooth top of the rotating driving transmission gear and the tooth top of the static driven transmission gear can have the relative relation of two limit states; the gear can be guided in advance, so that the collision risk during radial meshing of the rotating gear and the static gear is reduced or eliminated, and the service life of the gear is prolonged.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of composite material preparation, and particularly relates to a gear meshing guiding method. BACKGROUND

[0002] The preparation process of a composite material (prepreg) needs to use a pair of heating rollers to extrude the prepreg, and the pair of heating rollers need to transmit power during use. The pair of heating rollers need a large transmission force during use, so the current power transmission mostly adopts a chain transmission or a gear.

[0003] In the existing transmission scheme, the chain transmission cannot realize rotation direction conversion because of the existence of a tensioning sprocket (the tensioning sprocket is installed on the loose side), and can only rotate in the designed direction. When the gear transmission is used, the heating rollers need to be separated and combined, and at this time, the meshing gears are separated from each other due to the linear movement of the heating rollers. When the heating rollers are combined, the rotation function of the heating rollers (only one roller rotates) needs to be started in advance due to the production process, so that the rotating gear and the non-rotating gear collide with each other at a certain probability when they are combined. This problem will cause the risk of tooth tip fragmentation after long-term use.

[0004] Therefore, in view of the above technical problems, it is necessary to provide a gear meshing guiding method.

[0005] The information disclosed in this BACKGROUND section is only intended to increase an understanding of the general background of the application and should not be taken as an acknowledgement or any form of suggestion that this information forms prior art that is already known to those of ordinary skill in the art. SUMMARY

[0006] The purpose of the present application is to provide a gear meshing guiding method, which can solve the problem of gear collision at a certain probability when a rotating gear and a static gear are radially meshed.

[0007] In order to achieve the above-mentioned purpose, the technical scheme provided by an embodiment of the present application is as follows:

[0008] A gear meshing guiding method, the gear includes a transmission gear and a guiding gear, the tooth top of each tooth of the guiding gear is processed by twice chamfering, and the tooth top after processing is changed from an original circular arc tooth top surface to an angular structure. The transmission gear includes a driving transmission gear and a driven transmission gear with the same parameters, and the guiding gear includes a driving guiding gear and a driven guiding gear with the same parameters. The driving transmission gear and the driving guiding gear are coaxially installed, and the driven transmission gear and the driven guiding gear are coaxially installed.

[0009] The guiding method includes the following steps:

[0010] S1, in the process of engaging the driving gear and the driven gear, the tooth tip of the driving gear and the tooth tip of the stationary driven gear will have two extreme states of relative relationship, i.e. the tooth tip is opposite to the tooth root state and the tooth tip is opposite to the tooth tip state.

[0011] S2, when the tooth tip is opposite to the tooth root state occurs in the process of engaging the driving gear and the driven gear, the driven gear continues to advance, and the engagement is completed, and the process guides the gear to participate in the guiding work.

[0012] S3, when the tooth tip is opposite to the tooth tip state occurs in the process of engaging the driving gear and the driven gear, the driven gear advances, the main guide gear contacts the tooth tip of the driven gear. Since the main guide gear and the driven gear are both sharp corner structures, the driven gear continues to advance and the sharp corner is dislocated, the bevel of the tooth tip of the main guide gear applies a circumferential force to the tooth tip of the driven gear, drives the driven gear to rotate, and the main guide gear and the driven gear gradually approach the meshing state.

[0013] S4, the driven gear continues to advance and mesh, at this time, the tooth tip chamfer of the main guide gear and the tooth tip chamfer of the driven gear have completed the guiding work. The involute tooth surface of the main guide gear contacts the involute tooth surface of the driven gear, and the main guide gear and the driven gear enter the meshing state. At the same time, due to the guiding action of the main guide gear and the driven gear, the tooth tips of the driving gear and the driven gear also enter the meshing state, and the tooth tip of the driven gear is aligned with the tooth root region of the driving gear.

[0014] S5, the driven gear continues to advance under the guidance of the main guide gear and the driven gear, and the tooth tip of the driven gear completely enters the tooth root region of the driving gear, at this time, the driving gear and the driven gear are engaged.

[0015] In one or more embodiments of the present application, the number of teeth of the driving gear is n·z, the center distance is d, the modulus is m, and the addendum circle diameter is da=d+2(h a * ·m).

[0016] In one or more embodiments of the present application, the number of teeth of the guide gear is z, the center distance is d, the modulus is n·m, and the addendum circle diameter is da2=d+2(h a * ·n·m).

[0017] In one or more embodiments of the present application, the center line of each tooth of the main guide gear is coincident with the center line of every n teeth of the driving gear in the axial direction.

[0018] In one or more embodiments of the present application, the center line of each tooth of the guide gear coincides with the center line of every n teeth of the driven gear in the axial direction.

[0019] In one or more embodiments of the present application, the transmission gear is a standard involute cylindrical spur gear.

[0020] In one or more embodiments of the present application, the guide gear is a secondary processed standard involute cylindrical spur gear.

[0021] In one or more embodiments of the present application, the addendum circle radius of the guide gear is (n-1)h larger than that of the transmission gear. a * ·m.

[0022] In one or more embodiments of the present application, the addendum chamfer parameters of the guide gear are chamfer c1 and chamfer c2.

[0023] In one or more embodiments of the present application, the chamfer c1≤(n-1)h a * ·m, and the chamfer c2=t / 2, wherein t is the addendum tip circle arc surface size of the guide gear.

[0024] Compared with the prior art, the guide method of gear meshing of the present application can guide the gear in advance, thereby reducing or eliminating the risk of collision when the rotating gear and the static gear are radially meshed, and improving the service life of the gear. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments described in the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0026] Figure 1 It is a front view of the transmission gear and the guide gear in an embodiment of the present application.

[0027] Figure 2 It is a sectional view of the transmission gear and the guide gear in an embodiment of the present application.

[0028] Figure 3 It is a schematic diagram of the first meshing state of the transmission gear and the guide gear in an embodiment of the present application.

[0029] Figure 4 It is a schematic diagram of the second meshing state of the transmission gear and the guide gear in an embodiment of the present application.

[0030] Figure 5 Figure 3 is a schematic diagram of the third meshing state of the driving gear and the guide gear in an embodiment of the present application;

[0031] Figure 6 Figure 4 is a schematic diagram of the fourth meshing state of the driving gear and the guide gear in an embodiment of the present application;

[0032] Figure 7 Figure 5 is a schematic diagram of the guide gear structure in an embodiment of the present application.

[0033] Explanation of main reference signs:

[0034] 1 - driving gear, 2 - driven gear, 3 - main guide gear, 4 - from guide gear. DETAILED DESCRIPTION

[0035] In order to make the person skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by the person skilled in the art without creative labor should belong to the protection scope of the present application.

[0036] As shown in Figure 1, an embodiment of the present application is a guide method of gear meshing, which includes a driving gear and a guide gear. The tooth top of each tooth of the guide gear is twice chamfered at both ends, and the tooth top after processing is changed from the original circular tooth top surface to an angular structure, as shown in Figure 2. Figures 1 to 7 Figure 7 The driving gear is used for normal power transmission of the gear. When the driving gear intervenes in power transmission, the chamfered tooth tip of the guide gear no longer has a transmission function and does not contact the gear surface, i.e. the involute tooth surface of the untreated part still has a power transmission function. The chamfered tooth tip of the guide gear is used for guiding. When the gear enters normal meshing, the guide gear affects the end face coincidence of the gear due to the chamfered tooth tip, so that a large gap is generated during gear transmission, and the implicit transmission efficiency is low.

[0037]

[0038] ​​The transmission gear includes an active transmission gear 1 and a passive transmission gear 2 with the same parameters, and the guide gear includes a main guide gear 3 and a slave guide gear 4 with the same parameters. The active transmission gear 1 is coaxially mounted with the main guide gear 3, and the slave transmission gear 2 is coaxially mounted with the slave guide gear 4. The center line of each tooth of the main guide gear 3 is fixedly aligned with the center line of every n teeth of the active transmission gear 1 in the axial direction. The center line of each tooth of the slave guide gear 4 is fixedly aligned with the center line of every n teeth of the slave transmission gear 2 in the axial direction. This application ensures the synchronous operation and guiding function of the dual gears by utilizing the characteristics of the same center distance and the coincidence of the center lines of the tooth tips of the transmission gear and the guide gear.

[0039] Preferably, the transmission gear is a standard involute cylindrical spur gear, and the guide gear is a secondary processed standard involute cylindrical spur gear.

[0040] Specifically, the number of teeth of the transmission gear is: n·z, the center distance is: d, the module is: m, and the diameter of the tooth top circle is: da=d+2(h a * ·m). The number of teeth of the guide gear is: z, the center distance is: d, the module is: n·m, and the diameter of the tooth top circle is: da2=d+2(h a * ·n·m).

[0041] According to the above parameters, the radius of the guide gear tooth tip circle is (n-1) h larger than the semi-diameter of the transmission gear tooth tip circle. a * ·m.

[0042] like Figure 7 As shown, the chamfer parameters of the tooth top of the guide gear are chamfer c1 and chamfer c2. Chamfer c1≤(n-1)h a * m, chamfer c2 = t / 2, where t is the size of the arc surface of the guide gear tooth tip.

[0043] A method for guiding gear meshing, comprising the following steps:

[0044] S1. During the meshing process between the driving transmission gear 1 and the driven transmission gear 2, the tooth tip of the rotating driving transmission gear 1 and the tooth tip of the stationary driven transmission gear 2 will change from the state where the tooth tip is facing the tooth root area to the state where the tooth tip is facing the tooth root area. Figure 3 The relative relationship between the two limit states. In actual operation, the state of the tooth tip facing the tooth root area is different from Figure 3 It can exist at any position between Figure 3 It represents the worst state of meshing transmission, where the tooth tips are facing each other.

[0045] S2. When the driving transmission gear 1 and the driven transmission gear 2 are meshed and the tooth tip is facing the tooth root, the driven transmission gear 2 continues to move forward and the meshing is completed. In this process, the guide gear participates in the guiding work.

[0046] S3, occurs when the driving transmission gear 1 and the driven transmission gear 2 are meshed Figure 3 When the tooth tip is facing the tooth tip in the worst state, the driven transmission gear 2 moves forward and the main guide gear 3 contacts the tooth tip of the slave guide gear 4. Because the main guide gear 3 and the slave guide gear 4 are both sharp-angle structures, the slave guide gear 4 or the driven transmission gear 2 continues to move forward and the sharp angle is misaligned, such as Figure 4 As shown, the chamfered bevel at the tooth tip of the main guide gear 3 applies a circumferential force to the tooth tip of the slave guide gear 4, driving the slave guide gear 4 to rotate, and at the same time, the main guide gear 3 and the slave guide gear 4 gradually approach a meshing state.

[0047] S4, continue to move forward from the guide gear 4 or the driven transmission gear 2 to engage, that is, Figure 5 In the state shown, the chamfered tooth tips of the main guide gear 3 and the follower guide gear 4 have completed their guiding operation. The involute tooth surfaces of the main guide gear 3 and the follower guide gear 4 are in contact, and the main guide gear 3 and the follower guide gear 4 enter a meshing state. Simultaneously, due to the guiding effect of the main guide gear 3 and the follower guide gear 4, the tooth tips of the driving transmission gear 1 and the driven transmission gear 2 are also in a state of near meshing, with the tooth tips of the driven transmission gear 2 aligned with the tooth root area of ​​the driving transmission gear 1.

[0048] S5, continue to move forward from the guide gear 4 or the driven transmission gear 2, that is, Figure 6 In the state shown, under the guidance of the main guide gear 3 and the slave guide gear 4, the tooth tip of the driven transmission gear 2 completely enters the tooth root area of ​​the driving transmission gear 1, and the engagement of the driving transmission gear 1 and the driven transmission gear 2 is completed.

[0049] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0050] Furthermore, it should be understood that although the specification is described in terms of embodiments, not every embodiment includes every feature or implementation described herein. The specification can include implicit combinations of explicitly mentioned features and / or implicit combinations of implicitly mentioned features. Such combinations are also expressly included within the scope of the specification and an embodiment.

Claims

1. A method for guiding gear meshing, characterized in that: The gear includes a transmission gear and a guide gear. Both ends of the tooth top of each tooth of the guide gear are chamfered twice. The tooth top after processing is changed from the original arc tooth top surface to a sharp angle structure. The transmission gear includes an active transmission gear and a driven transmission gear with the same parameters. The guide gear includes a main guide gear and a slave guide gear with the same parameters. The active transmission gear is coaxially mounted with the main guide gear, and the driven transmission gear is coaxially mounted with the slave guide gear. The guiding method includes the following steps: S1. During the meshing process between the driving transmission gear and the driven transmission gear, the tooth tips of the rotating driving transmission gear and the stationary driven transmission gear will have two extreme relative states, namely, the state where the tooth tip is directly opposite to the tooth root and the state where the tooth tip is directly opposite to the tooth tip; S2. When the driving transmission gear and the driven transmission gear are meshing and the tooth tip is facing the tooth root, the driven transmission gear continues to move forward and the meshing is completed. During this process, the guide gear participates in the guiding work; S3. When the driving transmission gear and the driven transmission gear are meshing and the tooth tips are facing each other, the driven transmission gear moves forward, and the tooth tips of the main guide gear and the slave guide gear come into contact. Since both the main guide gear and the slave guide gear have sharp angles, the slave guide gear continues to move forward and the sharp angles are misaligned. The chamfered surface of the tooth tip of the main guide gear exerts a circumferential force on the tooth tip of the slave guide gear, driving the slave guide gear to rotate. At the same time, the main guide gear and the slave guide gear gradually approach the meshing state. S4, the slave guide gear continues to move forward and engages. At this time, the chamfers of the tooth tips of the main guide gear and the slave guide gear have completed the guiding work. The involute tooth surfaces of the main guide gear and the slave guide gear are in contact, and the main guide gear and the slave guide gear enter a meshing state. At the same time, due to the guiding effect of the main guide gear and the slave guide gear, the tooth tips of the active transmission gear and the driven transmission gear also enter a meshing state. The tooth tip of the driven transmission gear has been aligned with the tooth root area of ​​the active transmission gear; S5. The slave guide gear continues to move forward. Under the guidance of the master guide gear and the slave guide gear, the tooth tip of the driven transmission gear completely enters the tooth root area of ​​the driving transmission gear. At this time, the engagement of the driving transmission gear and the driven transmission gear is completed.

2. A gear meshing guiding method according to claim 1, characterized in that: The number of teeth of the transmission gear is: n·z, the center distance is: d, the module is: m, and the diameter of the tooth top circle is: da=d+2(h a * ·m).

3. A gear meshing guiding method according to claim 2, characterized in that: The number of teeth of the guide gear is: z, the center distance is: d, the module is: n·m, and the diameter of the tooth top circle is: da2=d+2(h a * ·n·m).

4. A gear meshing guiding method according to claim 3, characterized in that: The center line of each tooth of the main guide gear is fixedly aligned with the center line of every n teeth of the active transmission gear in the axial direction.

5. The gear meshing guiding method according to claim 4, characterized in that: The center line of each tooth of the guide gear is fixedly aligned with the center line of every n teeth of the driven transmission gear in the axial direction.

6. The method for guiding gear meshing according to claim 5, characterized in that: The transmission gear is a standard involute cylindrical spur gear.

7. A gear meshing guiding method according to claim 6, characterized in that: The guide gear is a secondary processed standard involute cylindrical spur gear.

8. The gear meshing guiding method according to claim 7, characterized in that: The radius of the guide gear tooth top circle is (n-1)h larger than the semi-diameter of the transmission gear tooth top circle a * ·m.

9. The gear meshing guiding method according to claim 8, characterized in that: The tooth top chamfer parameters of the guide gear are chamfer c1 and chamfer c2.

10. The gear meshing guiding method according to claim 9, characterized in that: The chamfer c1≤(n-1)h a * m, the chamfer angle c2 = t / 2, where t is the size of the arc surface of the guide gear tooth tip.

Images