Positioning tool for gear outer circle grinding machine

Abstract

The application discloses a positioning tool for a gear outer circle grinding machine, which comprises a mandrel, a bearing tray, a plurality of connecting holes and a connecting structure. The bearing tray is arranged on the mandrel, and a gear is coaxially arranged on the bearing tray. The plurality of connecting holes are arranged on the bearing tray in a circumferential direction at intervals, and a through hole corresponding to the connecting hole is arranged on the gear. The connecting structure is arranged on the connecting hole, and the gear is fixed to the bearing tray through the connecting structure. When the gear needs to be fixed to the mandrel for gear grinding process, the bearing tray is first installed on the mandrel. Then, the gear is installed on the bearing tray through the connecting structure, the connecting hole and the through hole on the gear, so that the gear and the mandrel are connected. The connecting hole arranged on the gear in a circumferential direction at intervals is used for fixing the gear. In the gear grinding process, the moment generated by the grinding force is small, and the stability of the gear in the grinding process is improved.

Description

Technical Field

[0001] This application relates to the field of gear fixture technology, and in particular to positioning fixtures for gear cylindrical grinding machines. Background Technology

[0002] After heat treatment, in order to improve the transmission noise and accuracy of gears, a gear grinding process is required to improve the performance of the outer cylindrical tooth surface of the gear. The outer cylindrical tooth surface of the gear is ground by grinding a grinding wheel on a special CNC machine tool, while a certain grinding force is applied at the same time, so as to improve the quality of the outer cylindrical tooth surface of the gear and improve the meshing and transmission performance of the gear.

[0003] During the grinding process of the outer cylindrical tooth surface of the gear, the gear needs to be fixed.

[0004] In existing technologies, gear fixing structures generally fix the gear by fixing the inner hole of the gear. However, during the grinding process, the distance between the outer tooth surface of the gear and the inner hole of the gear is large, and a certain grinding force needs to be provided during the grinding process, which makes the gear prone to vibration during the grinding process, affecting the grinding quality.

[0005] Therefore, it is necessary to propose positioning fixtures for gear cylindrical grinding machines to improve gear stability, which has become an important technical problem that urgently needs to be solved. Utility Model Content

[0006] This application provides a positioning fixture for a gear cylindrical grinding machine, which aims to solve the problem in the prior art that the large distance between the outer cylindrical tooth surface of the gear and the inner hole of the gear, coupled with the need to provide a certain grinding force during the grinding process, makes the gear prone to vibration during grinding, thus affecting the grinding quality.

[0007] To achieve the above objectives, this application proposes a positioning fixture for a gear cylindrical grinding machine, comprising: a mandrel; a support plate, wherein the support plate is disposed on the mandrel and the gear is coaxially disposed on the support plate; multiple connecting holes, wherein multiple connecting holes are provided at intervals along the circumference on the support plate and the gear is provided with through holes corresponding to the connecting holes; and a connecting structure, wherein the connecting structure is disposed on the connecting holes and the gear is fixed to the support plate through the connecting structure.

[0008] In some embodiments, the connection structure includes: a screw rod passing through a connecting hole and a through hole on the gear; and a locking nut screwed onto the screw rod, the locking nut abutting against the gear.

[0009] In some embodiments, the device further includes: a clamping nut screwed onto the mandrel; a pressure cap movably disposed on the mandrel and located below the clamping nut; and a tensioning sleeve movably disposed on the mandrel and located below the pressure cap.

[0010] In some embodiments, the device further includes: an auxiliary pressure cylinder movably disposed on the mandrel; and an elastic element disposed between the pressure cap and the auxiliary pressure cylinder.

[0011] In some embodiments, it further includes: a top locking member disposed on the spindle, the top locking member abutting against a compression nut.

[0012] In some embodiments, the device further includes: a lower limiting cylinder, wherein the lower limiting cylinder is disposed on the spindle and the bearing tray abuts against the lower limiting cylinder; and a retaining spring, wherein the retaining spring is disposed on the spindle and the retaining spring abuts against the bearing tray.

[0013] This application proposes a positioning fixture for a gear cylindrical grinding machine, comprising: a mandrel; a support plate, which is disposed on the mandrel, and the gear is coaxially mounted on the support plate; multiple connecting holes, which are spaced circumferentially on the support plate, and the gear has through holes corresponding to the connecting holes; and a connecting structure, which is disposed in the connecting holes, and the gear is fixed to the support plate through the connecting structure. When the gear needs to be fixed to the mandrel for gear grinding, the support plate is first installed on the mandrel. Then, the gear is installed onto the support plate through the connecting structure, the connecting holes, and the through holes on the gear, thereby achieving the connection between the gear and the mandrel. Fixing the gear through the circumferentially spaced connecting holes on the gear results in a smaller torque generated by the grinding force during the grinding process, which is beneficial for improving the stability of the gear during grinding. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0015] Figure 1 This is a three-dimensional structural schematic diagram of a positioning fixture for a gear external cylindrical grinding machine according to an embodiment of this application;

[0016] Figure 2 This is a top view of a positioning fixture for a gear external cylindrical grinding machine according to an embodiment of this application;

[0017] Figure 3 for Figure 2 Sectional view at point AA;

[0018] Figure 4 for Figure 3 A magnified view of a section at point B in the middle;

[0019] Figure 5 for Figure 3 A magnified view of a section at point C.

[0020] In the diagram: 1. Mandrel; 2. Gear; 3. Screw; 4. Auxiliary pressure cylinder; 5. Pressure nut; 6. Top locking component; 7. Pressure cap; 8. Elastic component; 9. Locking nut; 10. Tensioning sleeve; 11. Support plate; 12. Lower limit cylinder; 13. Buffer component; 14. Snap ring; 15. Flexible gasket. Detailed Implementation

[0021] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0022] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0023] It should also be noted that when a component is described as "fixed to" or "set on" another component, it can be directly on the other component or there may be an intervening component present. When a component is described as "connected to" another component, it can be directly connected to the other component or there may be an intervening component present.

[0024] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed in this application.

[0025] See Figure 1 , Figure 2 and Figure 3 As shown, this application proposes a positioning fixture for a cylindrical grinding machine with gear 2, including: a spindle 1; a support plate 11, the support plate 11 being disposed on the spindle 1, and the gear 2 being coaxially disposed on the support plate 11; multiple connecting holes, the support plate 11 being provided with multiple connecting holes spaced apart along the circumference, and the gear 2 being provided with through holes corresponding to the connecting holes; and a connecting structure, the connecting structure being disposed in the connecting holes, and the gear 2 being fixed to the support plate 11 through the connecting structure.

[0026] The mandrel 1 forms the structural basis of the positioning fixture for the external cylindrical grinding machine of gear 2. All other structures on the positioning fixture are directly or indirectly connected to the mandrel 1. The mandrel 1 is connected to the grinding machine. The support plate 11 is snapped onto the mandrel 1. Gear 2 has an inner hole, through which it can be fitted onto the mandrel 1, and is supported by the support plate 11. The outer diameter of the support plate 11 is smaller than the diameter of the root circle of the gear 2.

[0027] The multiple connecting holes and connecting structure are the core structure of the positioning fixture for the external cylindrical grinding machine of gear 2. By fixing gear 2 to the support plate 11 through the connecting structure, gear 2 is thus fixed to the spindle 1. Preferably, there are 8 connecting holes, which are evenly spaced along the circumference.

[0028] Specifically, when gear 2 needs to be fixed to mandrel 1 for gear grinding, the support plate 11 is first installed on mandrel 1. Then, gear 2 is installed on support plate 11 through the connecting structure, connecting holes, and through holes on gear 2, thus achieving the connection between gear 2 and mandrel 1. By fixing gear 2 through connecting holes that are circumferentially spaced, the torque generated by the grinding force is relatively small during the gear grinding process, which helps to improve the stability of gear 2 during the grinding process.

[0029] See Figure 1 , Figure 2 , Figure 3 and Figure 5 As shown, in some embodiments, the connection structure includes: a screw 3, which passes through a connecting hole and a through hole on the gear 2; the connecting hole has an internal thread adapted to the screw 3; the screw 3 is screwed onto the connecting hole; and the end of the screw 3 abuts against the bearing tray 11; and a locking nut 9, which is screwed onto the screw 3 and abuts against the gear 2. The screw 3 and the locking nut 9 achieve a stable connection between the bearing tray 11 and the gear 2, improving the stability of the gear 2 during the grinding process.

[0030] In this embodiment, a flexible washer 15 is also provided between the locking nut 9 and the gear 2, and the locking nut 9 abuts against the gear 2 through the flexible washer 15. Preferably, the flexible washer 15 is made of rubber. The flexible washer 15 helps to prevent the locking nut 9 from loosening during the gear grinding process and can also prevent the locking nut 9 from damaging the gear 2.

[0031] See Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, in some embodiments, the device further includes: a clamping nut 5, screwed onto the mandrel 1, the end of the mandrel 1 having an external thread adapted to the clamping nut 5; a pressure cap 7, movably mounted on the mandrel 1, axially movable on the mandrel 1, the pressure cap 7 located below the clamping nut 5; and a tensioning sleeve 10, movably mounted on the mandrel 1, located below the pressure cap 7. The mandrel 1 has a tapered section. When the gear 2 is placed on the support tray 11, the tapered section is located within the inner hole of the gear 2. When the gear 2 needs to be fixed, the clamping nut 5 is tightened, driving the clamping nut 5 to move downwards, thereby causing the pressure cap 7 to move downwards. The pressure cap 7 then causes the tensioning sleeve 10 to move downwards. The bottom end of the tensioning sleeve 10 expands within the inner hole of the gear 2 under the action of the tapered section, thereby achieving the connection between the mandrel 1 and the inner hole of the gear 2. Through this dual connection method, the stability of the gear 2 is further improved.

[0032] In this embodiment, a buffer 13 is provided between the gear 2 and the spindle 1. The buffer 13 is made of rubber, and the buffer 13 is provided to improve the stability of the gear 2.

[0033] See Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, in some embodiments, it further includes: an auxiliary pressure cylinder 4, which is movably disposed on the mandrel 1; and an elastic element 8, which is disposed between the pressure cap 7 and the auxiliary pressure cylinder 4. When installing the gear 2, the auxiliary pressure cylinder 4, under the action of the elastic element 8, presses the gear 2 against the support tray 11, achieving initial positioning and fixation of the gear 2. The elastic element 8 is a spring.

[0034] In this embodiment, both the auxiliary pressure cylinder 4 and the pressure cap 7 are provided with axial extensions, which restrict the deformation direction of the elastic member 8.

[0035] See Figure 1 , Figure 2 and Figure 3 As shown, in some embodiments, it further includes: a top locking member 6, which is disposed on the mandrel 1 and abuts against the clamping nut 5. The top locking member 6 is used to prevent the clamping nut 5 from loosening. The top locking member 6 is fixed to the mandrel 1 by screws, and the top end of the mandrel 1 is provided with a threaded hole.

[0036] See Figure 1 , Figure 2 and Figure 3As shown, in some embodiments, the device further includes: a lower limiting cylinder 12, which is disposed on the spindle 1, and the support tray 11 abuts against the lower limiting cylinder 12; the lower limiting cylinder 12 is located below the support tray 11; and a retaining spring 14, which is disposed on the spindle 1 and abuts against the support tray 11. The retaining spring 14 is located above the support tray 11, and the support tray 11 is fixed to the spindle 1 by the lower limiting cylinder 12 and the retaining spring 14. The spindle 1 is provided with a lower limiting platform, and the lower limiting cylinder 12 is disposed on the lower limiting platform.

[0037] The above description is only a part or preferred embodiment of this application. Neither the text nor the drawings should limit the scope of protection of this application. All equivalent structural transformations made using the content of this application's specification and drawings under the overall concept of this application, or direct / indirect applications in other related technical fields, are included within the scope of protection of this application.

Claims

1. A positioning tool for a gear cylindrical grinder, characterized by, include: mandrel (1); A support tray (11) is disposed on the spindle (1), and a gear (2) is coaxially disposed on the support tray (11); Multiple connecting holes are provided on the support tray (11) at intervals along the circumference, and the gear (2) is provided with through holes corresponding to the connecting holes; A connecting structure is provided in the connecting hole, and the gear (2) is fixed to the bearing tray (11) through the connecting structure.

2. The positioning tool for a gear outer circle grinding machine according to claim 1, characterized by, The connection structure includes: The screw (3) passes through the connecting hole and the through hole on the gear (2); Locking nut (9) is screwed onto the screw rod (3) and abuts against the gear (2).

3. The positioning tool for a gear outer circle grinding machine according to claim 1, wherein Also includes: A clamping nut (5) is screwed onto the mandrel (1); A pressure cap (7) is movably disposed on the spindle (1) and the pressure cap (7) is located below the clamping nut (5); A tensioning sleeve (10) is movably disposed on the mandrel (1) and is located below the pressure cap (7).

4. The positioning tool for a gear outer circle grinding machine according to claim 3, characterized by, Also includes: Auxiliary pressure cylinder (4), which is movably disposed on the mandrel (1); The elastic element (8) is disposed between the pressure cap (7) and the auxiliary pressure cylinder (4).

5. The positioning tool for a gear outer circle grinding machine according to claim 3, wherein Also includes: Top locking member (6), the top locking member (6) is disposed on the spindle (1), and the top locking member (6) abuts against the clamping nut (5).

6. The positioning tool for a gear outer circle grinding machine according to claim 5, wherein Also includes: The lower limit cylinder (12) is provided on the spindle (1), and the support tray (11) abuts against the lower limit cylinder (12). A retaining ring (14) is provided on the spindle (1), and the retaining ring (14) abuts against the bearing tray (11).

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