Cylindrical gear inner hole grinding clamp

Abstract

The utility model discloses a cylindrical gear inner hole grinding clamp which comprises a body, a nut, an elastic sleeve, a positioning measuring rod, supporting nails and a connecting plate, a circular groove with taper is formed in one side of the body, a bottom plate is arranged at the bottom of the circular groove, and the three supporting nails which are arranged at intervals are connected into the bottom plate in a threaded mode. An elastic sleeve with taper is arranged in the circular groove and is wedged in the circular groove; a circular connecting plate is arranged between the elastic sleeve and the bottom plate of the circular groove and in the body; one end of each of three positioning measuring rods at intervals is fixed at the edge of the plate surface of the connecting plate close to one side of the elastic sleeve, and the rod bodies of the positioning measuring rods are positioned in the elastic sleeve; the end of the supporting nail abuts against the plate face of the side, away from the elastic sleeve, of the connecting plate, the outer portion of the circular groove is in threaded connection with a nut, an annular top plate is fixed to the top of the nut, and the top plate abuts against the elastic sleeve. The center of a part hole can be quickly found during alignment, and the production efficiency is improved while the precision of the part is ensured.

Description

Technical Field

[0001] The utility model relates to a cylindrical gear inner hole grinding fixture, belonging to the technical field of mechanical processing. Background Art

[0002] A certain artillery part is a gear transmission component, widely used in the mechanical field. Gear parts play a role in transmitting force and motion, making precision control of these parts extremely important. Gear grinding can be performed in many ways, the most important of which is tooth surface grinding. As the benchmark for tooth surface grinding, the machining of the shaft hole must be precise.

[0003] The grinding of shaft holes is different from the grinding of tooth surfaces. When grinding tooth surfaces, it is easier to find the center of the circle because there is a grinding allowance. For parts that have been surface hardened, the gear teeth are no longer processed but can be used directly. However, when grinding holes, it is more difficult to find the center of the circle and it takes a longer time, resulting in low production efficiency.

[0004] During mass production, a cylindrical gear inner hole grinding fixture is designed to improve production efficiency. Utility Model Content

[0005] In order to overcome the deficiencies of the prior art, the utility model provides a cylindrical gear inner hole grinding fixture, which can quickly find the center of the part hole during timing, thereby ensuring the part accuracy while improving production efficiency.

[0006] The technical solution adopted by the utility model to solve its technical problems is: a cylindrical gear inner hole grinding fixture, including a body, a nut, an elastic sleeve, a positioning measuring rod, a supporting nail and a connecting plate, a circular groove with a taper is provided inside one side of the body, a bottom plate is provided at the bottom of the circular groove, and three spaced supporting nails are threadedly connected in the bottom plate; a tapered elastic sleeve is installed in the circular groove, and a circular connecting plate is provided in the body between the elastic sleeve and the bottom plate of the circular groove; on the side close to the elastic sleeve, one end of three spaced positioning measuring rods is fixed at the edge of the plate surface of the connecting plate, and the rod body of the positioning measuring rod is located in the elastic sleeve; the end of the supporting nail is placed on the plate surface of the connecting plate away from the elastic sleeve, a nut is threadedly connected to the outside of the circular groove, and a circular ring-shaped top plate is fixed on the top of the nut, and the top plate is against the elastic sleeve.

[0007] Furthermore, the elastic sleeve is wedged tightly in the circular groove of the main body.

[0008] Furthermore, the supporting pins and the positioning and measuring rods are evenly spaced in the circumferential direction.

[0009] Furthermore, the supporting pins and the positioning and measuring rods are in the same direction.

[0010] Furthermore, the diameter of the circular groove opening is small, and the diameter of the bottom of the circular groove is large.

[0011] The beneficial effects of the utility model are: the utility model has a reasonable structure, is very convenient for loading and unloading workpieces, and has high positioning accuracy; the center of the part hole can be quickly found during batch production and timing, thereby ensuring the accuracy of the parts and improving production efficiency; the fixture is suitable for the inner hole grinding of cylindrical spur gears. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0013] Figure 1 It is a structural diagram of the present utility model.

[0014] Numbers in the figure:

[0015] 1. Main body, 101. Round groove, 102. Bottom plate, 2. Nut, 201. Top plate, 3. Elastic sleeve, 4. Positioning measuring rod, 5. Support pin, 6. Workpiece, 7. Connecting plate. DETAILED DESCRIPTION

[0016] like Figure 1 As shown, a cylindrical gear inner hole grinding fixture includes a body 1, a nut 2, an elastic sleeve 3, a positioning measuring rod 4, a supporting pin 5 and a connecting plate 7. A tapered circular groove 101 is provided inside one side of the body 1. The notch diameter of the circular groove 101 is small and the bottom diameter of the circular groove 101 is large; a bottom plate 102 is provided at the bottom of the circular groove 101, and three spaced supporting pins 5 are threadedly connected to the bottom plate 102; a tapered elastic sleeve 3 is installed inside the circular groove 101, and the elastic sleeve 3 is wedged in the circular groove 101; between the elastic sleeve 3 and the bottom plate 102 of the circular groove 101, the body 1 A circular connecting plate 7 is provided in the middle; on the side close to the elastic sleeve 3, one end of three spaced positioning measuring rods 4 is fixed at the edge of the plate surface of the connecting plate 7, and the rod body of the positioning measuring rod 4 is located in the elastic sleeve 3; the supporting nails 5 and the positioning measuring rods 4 are evenly spaced in the circumferential direction, and the directions of the supporting nails 5 and the positioning measuring rods 4 are consistent; the end of the supporting nail 5 is on the plate surface of the connecting plate 7 away from the elastic sleeve 3, and the external thread of the circular groove 101 is connected to a nut 2, and a circular ring-shaped top plate 201 is fixed on the top of the nut 2, and the top plate 201 is against the elastic sleeve 3.

[0017] During use, the center of the end face swing can be determined based on the outer circle as the reference, but the center of the center hole cannot be determined based on the outer circle as the reference. It should be found using the pitch circle, because the reference of the gear is the pitch circle. To find the center based on the pitch circle, it is necessary to insert a suitable positioning measuring rod 4 into the tooth groove of the workpiece 6 and find the center on its outside. The positioning measuring rod 4 is fixed to the connecting plate 7 in advance, and then each positioning measuring rod 4 is inserted into the tooth groove of the workpiece 6 respectively. After the workpiece 6 is positioned on the tooth surface by the measuring rod 4, the tapered elastic sleeve 3 is inserted, and then the whole is installed in the body 1 of the fixture and wedged. The nut 2 is rotated to fix the workpiece 6, and the supporting pin 5 is pressed against the connecting plate 7. The inner hole is positioned and ground with the involute tooth profile of the gear. The fixture uses the gear tooth surface after heat treatment as the positioning reference to reduce the error caused by the gear heat treatment deformation and grind the centering inner hole of the gear to ensure the radial runout requirement of the gear ring.

Claims

1. A cylindrical gear inner hole grinding fixture, characterized by: The invention comprises a body (1), a nut (2), an elastic sleeve (3), a positioning measuring rod (4), a supporting pin (5) and a connecting plate (7), wherein a tapered circular groove (101) is provided inside one side of the body (1), a bottom plate (102) is provided at the bottom of the circular groove (101), and three spaced supporting pins (5) are threadedly connected in the bottom plate (102); a tapered elastic sleeve (3) is provided inside the circular groove (101), and a positioning measuring rod (4) is provided in the body (1) between the elastic sleeve (3) and the bottom plate (102) of the circular groove (101). A circular connecting plate (7) is provided; one end of three spaced positioning measuring rods (4) is fixed at the edge of the plate surface of the connecting plate (7) on the side close to the elastic sleeve (3), and the rod body of the positioning measuring rod (4) is located in the elastic sleeve (3); the end of the supporting nail (5) is placed on the plate surface of the connecting plate (7) away from the elastic sleeve (3), and a nut (2) is connected to the external thread of the circular groove (101), and a circular top plate (201) is fixed on the top of the nut (2), and the top plate (201) is against the elastic sleeve (3).

2. The cylindrical gear inner hole grinding fixture according to claim 1, characterized in that: The elastic sleeve (3) is wedged in the circular groove (101) of the body (1).

3. The cylindrical gear inner hole grinding fixture according to claim 1, characterized in that: The supporting pins (5) and the positioning measuring rods (4) are evenly spaced in the circumferential direction.

4. The cylindrical gear inner hole grinding fixture according to claim 1, characterized in that: The directions of the supporting pin (5) and the positioning measuring rod (4) are consistent.

5. The cylindrical gear inner hole grinding fixture according to claim 1, characterized in that: The diameter of the notch of the circular groove (101) is small, and the diameter of the bottom of the circular groove (101) is large.

Images