Centering and fastening clamp for internal spline gear

Abstract

The utility model relates to the technical field of farming machine part machining, and discloses a centering and fastening clamp of an internal spline gear, which comprises a machine shell, a through hole is formed in the center of the interior of the machine shell, a centering and fastening assembly communicated into the through hole is arranged in the machine shell, air cylinders are installed on the opposite sides of a top plate and a bottom plate in a central symmetry mode, and the air cylinders are connected with the through hole. Sliding grooves are formed in the positions, corresponding to the air cylinders, of the upper side and the lower side of the machine shell, rack plates are slidably connected into the sliding grooves, the rack plates are fixedly installed at one ends of telescopic shafts of the air cylinders, and the rack plates are used for driving centering and fastening assemblies to conduct centering and fastening on gears. The gear ring rotates to drive the extrusion head to extrude the inclined face of the sliding block, so that the arc pressing plates are driven to slide towards the interior of the through hole, the arc pressing plates extrude the outer side of the internal gear for fastening and clamping, the gear can be positioned in the center by moving and extruding the gear at the same time through the four sets of arrayed arc pressing plates, and the clamping effect is good. Therefore, the centering, clamping and fastening effects can be achieved.

Description

Technical Field

[0001] This utility model relates to the field of agricultural machinery component processing technology, specifically a centering and fastening clamp for an internal spline gear. Background Technology

[0002] Internal spline gears are transmission gears whose inner bore is connected to the external spline tooth surface of the drive shaft using involute splines. Internal spline gears play an important role in agricultural machinery. Through their unique structural design, internal spline gears can effectively limit axial displacement while transmitting torque, ensuring the stability and reliability of the connection. This design enables agricultural machinery to maintain a stable transmission effect during operation, reducing the decrease in transmission efficiency and mechanical failures caused by axial displacement.

[0003] When machining internal splined gears, the gears need to be clamped and fixed in place using a fixture before boring can be performed. However, existing clamping fixtures are not convenient for positioning the gear center when clamping and fixing the gears, which affects the machining accuracy. Therefore, further improvements can be made. Utility Model Content

[0004] To address the aforementioned problems, this utility model provides the following technical solution: a centering and fastening fixture for an internal spline gear, comprising a housing, a top plate and a bottom plate fixedly mounted on the upper and lower sides of the housing respectively, the top plate and the bottom plate being centrally symmetrical, and lugs fixedly mounted on the front and rear sides of the bottom plate, a through hole being opened in the center of the housing, a centering and fastening assembly being provided inside the housing and passing through the through hole, a cylinder being centrally symmetrically mounted on one side opposite to the top plate and the bottom plate, and sliding grooves being opened on the upper and lower sides of the housing corresponding to the cylinders, a rack plate being slidably connected in the sliding grooves, and the rack plate being fixedly mounted on one end of the telescopic shaft of the cylinder, the rack plate being used to drive the centering and fastening assembly to center and fasten the gear.

[0005] As an optimization, the centering and fastening assembly includes a gear ring rotatably connected inside the housing, and the gear ring meshes with a rack plate. An extrusion head is fixedly installed on the inner wall of the gear ring. The housing is equipped with a centering component that is clamped by the extrusion head driving the extrusion and fastening gear. By starting the cylinder, the rack plate can be driven to slide, which in turn drives the gear ring to rotate, thereby causing the extrusion head to rotate and drive the centering component.

[0006] As an optimization, the centering component includes symmetrical L-shaped plates fixedly installed inside the housing, with a slider slidably connected between the two symmetrical L-shaped plates. The slider has inclined surfaces on both sides of one end relative to the extrusion head. An arc pressure plate is fixedly installed at one end of the slider through hole. When the extrusion head rotates, it will extrude the inclined surfaces of the slider, which will then drive the arc pressure plate to slide into the through hole, thus extruding it to the outside of the internal gear for fastening and clamping.

[0007] As an optimization, the slider has side grooves on both sides, and the right-angled side of the L-shaped plate is inserted into the bottom of the side groove. A compression spring is fixedly installed between the inner wall of the side groove and the right-angled side of the L-shaped plate. The compression spring can be compressed by the slider sliding along the inner wall of the L-shaped plate under pressure.

[0008] As an optimization, the slider has a groove at the center of its end, and the extrusion head is embedded in the groove. The slider is squeezed and slid by the rotation of the extrusion head, and the compression spring can always give the slider a reverse reset force, which will make the extrusion head embedded in the groove.

[0009] As an optimization, the bottom of the slider is provided with a movable groove that passes through the arc pressure plate, and a movable block is slidably connected inside the movable groove. A clamping head is fixedly installed on the bottom side of the movable block, and the clamping head is clamped between the outer teeth of the gear. By clamping the outer side of the gear downward by the arc pressure plate, the clamping head will be clamped between the outer teeth of the gear.

[0010] As an optimization, threaded cylinders are fixedly installed at both ends of the movable groove, and fastening screws are screwed into the inside of the threaded cylinders. A knob head is fixedly installed at one end of the fastening screws on both sides facing away from each other, and the knob head has an internal hexagonal groove. By inserting a hexagonal rod into the hexagonal groove, the fastening screw can be easily turned.

[0011] The beneficial effects of this utility model are:

[0012] 1. The centering and fastening fixture for the internal spline gear is activated by a cylinder that pushes the rack plate to rotate the gear ring. This causes the extrusion head to press the inclined surface of the slider, which in turn causes the arc pressure plate to slide into the through hole. This results in the arc pressure plate pressing against the outside of the internal gear for fastening. Furthermore, by moving and extruding the gear simultaneously through four arrays of arc pressure plates, the gear can be positioned in the center, thus achieving the function of centering, clamping, and fastening.

[0013] 2. The centering and fastening fixture for the internal spline gear clamps the gear downwards with an arc-pressure plate, causing the chuck to engage between the outer teeth of the gear, thus restricting the gear's rotation. Then, a hexagonal rod is inserted into the hexagonal slot, allowing the fastening screw to be easily turned. This causes the fastening screw to press against the outside of the movable block for a tighter position, further securing the gear teeth and improving the stability of the gear clamping. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a cross-sectional view of the internal structure of this utility model;

[0016] Figure 3 This is a schematic diagram of the centering and fastening structure of this utility model;

[0017] Figure 4 This is a front sectional view of the centering component structure of this utility model.

[0018] In the diagram: 1. Housing; 2. Top plate; 3. Bottom plate; 4. Support lug; 5. Centering and fastening assembly; 6. Cylinder; 7. Rack plate; 8. Gear ring; 9. Extrusion head; 10. L-shaped plate; 11. Slider; 12. Arc pressure plate; 13. Side groove; 14. Compression spring; 15. Movable groove; 16. Movable block; 17. Clamp; 18. Fastening screw; 19. Knob head. Detailed Implementation

[0019] In the description of this application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figure 1-2 A centering and fastening fixture for an internal spline gear includes a housing 1. A top plate 2 and a bottom plate 3 are fixedly installed on the upper and lower sides of the housing 1, respectively, and the top plate 2 and the bottom plate 3 are centrally symmetrical. Lugs 4 are fixedly installed on the front and rear sides of the bottom plate 3. A through hole is opened in the center of the housing 1. A centering and fastening component 5 is provided inside the housing 1 and passes through the through hole. A cylinder 6 is centrally symmetrically installed on the opposite side of the top plate 2 and the bottom plate 3. Slide grooves are opened on the upper and lower sides of the housing 1 corresponding to the cylinder 6. A rack plate 7 is slidably connected in the slide groove. The rack plate 7 is fixedly installed at one end of the telescopic shaft of the cylinder 6. The rack plate 7 is used to drive the centering and fastening component 5 to center and fasten the gear.

[0022] Please see Figure 3-4The centering and fastening assembly 5 includes a gear ring 8 rotatably connected inside the housing 1, and the gear ring 8 and the rack plate 7 are meshed together. The inner wall of the gear ring 8 is fixedly mounted with an array of extrusion heads 9. The housing 1 is provided with a centering component that is clamped by the extrusion head 9 driving the extrusion and fastening gear. By starting the cylinder 6, the rack plate 7 can be driven to slide, which in turn drives the gear ring 8 to rotate, so that the extrusion head 9 can rotate to drive the centering component.

[0023] Please see Figure 3-4 The centering component includes symmetrical L-shaped plates 10 fixedly installed inside the housing 1. A slider 11 is slidably connected between the two symmetrical L-shaped plates 10. The slider 11 has inclined surfaces on both sides of one end relative to the extrusion head 9. An arc pressure plate 12 is fixedly installed at one end of the through hole of the slider 11. When the extrusion head 9 is rotated, the inclined surface of the slider 11 will be extruded, which will drive the arc pressure plate 12 to slide into the through hole. It can be extruded on the outside of the internal gear for fastening and clamping. The gear can be positioned in the center by the simultaneous movement of the arc pressure plates 12 in the outer array, which plays the role of centering, clamping and fastening.

[0024] Please see Figure 3-4 The slider 11 has side grooves 13 on both sides, and the right-angled side of the L-shaped plate 10 is inserted into the bottom of the side groove 13. A compression spring 14 is fixedly installed between the inner wall of the side groove 13 and the right-angled side of the L-shaped plate 10. When the slider 11 is pressed and slides along the inner wall of the L-shaped plate 10, the compression spring 14 can be compressed, and the compression spring 14 can assist the L-shaped plate 10 to return to its original position through its own elasticity. The end center of the slider 11 has a groove, and the extrusion head 9 is embedded in the groove. The extrusion head 9 rotates and extrudes the slider 11 to slide. The compression spring 14 can always give the slider 11 a reverse return force, which will make the extrusion head 9 embedded in the groove, thus playing a positioning and limiting role.

[0025] Please see Figure 3-4 The bottom of the slider 11 has a movable groove 15 that passes through the arc pressure plate 12, and a movable block 16 is slidably connected inside the movable groove 15. A clamping head 17 is fixedly installed on the bottom side of the movable block 16, and the clamping head 17 is clamped between the outer teeth of the gear. By clamping the outer side of the gear downward by the arc pressure plate 12, the clamping head 17 will be clamped between the outer teeth of the gear, thereby restricting the rotation of the gear and further improving the fastening stability of the gear clamping.

[0026] Please see Figure 3-4 Threaded cylinders are fixedly installed at both ends of the movable groove 15. Fastening screws 18 are screwed into the inside of the threaded cylinders. A knob head 19 is fixedly installed at the opposite end of the two fastening screws 18. The knob head 19 has an internal hexagonal groove. By inserting the hexagonal rod into the hexagonal groove, the fastening screw 18 can be easily turned and rotated, which will then press against the outside of the movable block 16 for tight positioning, further tightening the gear teeth.

[0027] When in use, first place the gear to be processed into the through hole, and then start the cylinders 6 on the upper and lower sides at the same time. This will push the rack plate 7 to drive the gear ring 8 to rotate, which will then squeeze the inclined surface of the slider 11 through the extrusion head 9. This will drive the arc pressure plate 12 to slide into the through hole, which will then squeeze the arc pressure plate 12 on the outside of the internal gear for fastening and clamping. By moving and squeezing the gear at the same time through the four arrays of arc pressure plates 12, the gear can be positioned in the center.

[0028] At the same time, by clamping the arc plate 12 downwards on the outside of the gear, the chuck 17 will be locked between the outer teeth of the gear, thereby restricting the rotation of the gear. Then, by inserting the hexagonal rod into the hexagonal slot, the fastening screw 18 can be easily turned and rotated, thereby making the fastening screw 18 press against the outside of the movable block 16 for tight positioning, further tightening the gear teeth.

[0029] In summary, the centering and fastening fixture for the internal spline gear rotates by starting the cylinder 6, which pushes the rack plate 7 to rotate the gear ring 8. This causes the extrusion head 9 to press the inclined surface of the slider 11, which in turn causes the arc pressure plate 12 to slide into the through hole. This allows the arc pressure plate 12 to press against the outside of the internal gear for fastening. Furthermore, by moving and pressing the gear simultaneously with the four arrays of arc pressure plates 12, the gear can be positioned in the center, thus achieving the function of centering, clamping, and fastening.

[0030] By clamping the gear downwards with the arc pressure plate 12, the chuck 17 will be locked between the outer teeth of the gear, thus restricting the rotation of the gear. Then, by inserting the hexagonal rod into the hexagonal slot, the fastening screw 18 can be easily turned and rotated, thereby pressing the fastening screw 18 against the outside of the movable block 16 for tight positioning, further tightening the gear teeth, thereby improving the fastening stability of the gear clamping.

[0031] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," "join," and "fix" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0032] All standard parts used in this invention can be purchased from the market, and irregular parts can be customized according to the description and drawings.

[0033] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A centering and fastening fixture for an internal spline gear, comprising a housing (1), characterized in that: The top plate (2) and bottom plate (3) are fixedly installed on the upper and lower sides of the housing (1), respectively, and the top plate (2) and bottom plate (3) are centrally symmetrical. The bottom plate (3) is fixedly installed with lugs (4) on both the front and rear sides. The housing (1) has a through hole in the center. The housing (1) has a centering fastening assembly (5) that passes through the through hole. The top plate (2) and bottom plate (3) are centrally symmetrically installed on opposite sides. The housing (1) has a sliding groove on the upper and lower sides corresponding to the cylinder (6). A rack plate (7) is slidably connected in the sliding groove. The rack plate (7) is fixedly installed at one end of the telescopic shaft of the cylinder (6). The rack plate (7) is used to drive the centering fastening assembly (5) to center and fasten the gear.

2. The centering and fastening fixture for the internal spline gear according to claim 1, characterized in that: The centering and fastening assembly (5) includes a gear ring (8) rotatably connected inside the housing (1), and the gear ring (8) meshes with the rack plate (7). The inner wall of the gear ring (8) is fixedly mounted with an array of extrusion heads (9). The housing (1) is provided with a centering component that is clamped by the extrusion heads (9) driving the extrusion and fastening gear.

3. The centering and fastening fixture for the internal spline gear according to claim 2, characterized in that: The centering component includes symmetrical L-shaped plates (10) fixedly installed inside the housing (1), and a slider (11) is slidably connected between the two symmetrical L-shaped plates (10). The slider (11) has inclined surfaces on both sides of one end relative to the extrusion head (9), and an arc pressure plate (12) is fixedly installed at one end of the through hole of the slider (11).

4. The centering and fastening fixture for the internal spline gear according to claim 3, characterized in that: The slider (11) has side grooves (13) on both sides, and the right-angle side of the L-shaped plate (10) is inserted into the bottom of the side groove (13). A compression spring (14) is fixedly installed between the inner wall of the side groove (13) and the right-angle side of the L-shaped plate (10).

5. The centering and fastening fixture for the internal spline gear according to claim 4, characterized in that: The slider (11) has a groove at the center of its end, and the extrusion head (9) is embedded in the groove.

6. The centering and fastening fixture for the internal spline gear according to claim 4, characterized in that: The bottom of the slider (11) has an open movable groove (15) that passes through the arc pressure plate (12), and the movable groove (15) is slidably connected to a movable block (16). A locking head (17) is fixedly installed on the bottom side of the movable block (16), and the locking head (17) is locked between the outer teeth of the gear.

7. The centering and fastening fixture for the internal spline gear according to claim 6, characterized in that: The movable groove (15) has threaded cylinders fixedly installed at both ends. The threaded cylinders are screwed with fastening screws (18). A knob head (19) is fixedly installed at one end of the fastening screws (18) on both sides, and the knob head (19) has an internal hexagonal groove.

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