Driving clamp special for grinding outer circle of sector gear shaft

Abstract

The utility model discloses a special driving clamp for cylindrical grinding of a sector gear shaft, which belongs to the technical field of cylindrical grinding of sector gear shafts and comprises a driving sleeve, a transmission screw and an end cover. The driving sleeve is a circular ring sleeve; spline teeth which are distributed annularly are formed in the inner circular surface of the driving sleeve; a threaded hole is formed in the side face of the driving sleeve, the transmission screw is in threaded fit with the threaded hole to be fastened to the side face of the driving sleeve, and one end of the transmission screw extends out of the driving sleeve. A groove is formed in the bottom surface of one side of the driving sleeve, and the groove and the driving sleeve are concentric; the end cover is arranged in the groove, and the end cover is fixedly connected with the driving sleeve through a screw; the end cover is provided with a through hole concentric with the end cover. Compared with the prior art, the spline clamping structure is adopted, the probability that the driving clamp falls off from the sector gear shaft is effectively reduced, the stability in the grinding process is guaranteed, the clamping effect on the sector gear shaft is improved, and the driving sleeve is easy, convenient and fast to operate and low in difficulty when used.

Description

Technical Field

[0001] The utility model relates to the technical field of external circle grinding processing of a sector gear shaft, and more specifically, it especially belongs to a special driving fixture for external circle grinding of a sector gear shaft. Background Art

[0002] At present, when the external circle of a sector gear shaft is ground, a driving clamp combination with an end center + snap ring structure is used on a machine tool to clamp the sector gear shaft. However, on one hand, the driving clamp with a snap ring structure is not reliable in clamping during use. The spring is prone to breakage, and the positioning pin is also prone to wear, resulting in the easy detachment of the driving clamp. After detachment, the workpiece cannot be effectively driven for grinding, and it will cause the workpiece to be scrapped and the grinding wheel to be damaged, causing waste loss in the production workshop and loss of machine tool accuracy. On the other hand, when it is installed on the sector gear shaft, it is necessary to distinguish the front and back sides, which has certain technical requirements for operators. Summary of the Invention

[0003] The purpose of the utility model is to overcome the deficiencies of the above traditional technologies, and provide a special driving fixture for external circle grinding of a sector gear shaft, so as to achieve the purpose of improving the clamping effect on the sector gear shaft and the operation convenience during its use.

[0004] The special driving fixture for external circle grinding of a sector gear shaft provided by the utility model includes a driving sleeve, a transmission screw rod and an end cover; the driving sleeve is an annular sleeve; the inner circular surface of the driving sleeve is provided with spline teeth distributed in a ring; a threaded hole matched with the transmission screw rod is opened on the side surface of the driving sleeve, and the transmission screw rod is fastened on the side surface of the driving sleeve through threaded cooperation with the threaded hole, and one end of the transmission screw rod extends out of the driving sleeve; a circular groove is opened on the bottom surface of one side of the driving sleeve, and the groove is concentric with the driving sleeve; the end cover is arranged in the groove, and the end cover is fixedly connected with the driving sleeve through screws; a through hole concentric with it is opened on the end cover.

[0005] Further, the number of the threaded holes is two, which are symmetrically distributed on both sides of the driving sleeve; transmission screw rods are arranged at the threaded holes.

[0006] The utility model provides a special drive fixture for grinding the outer circle of a sector gear shaft, which is designed with a drive sleeve, and the inner circle surface of the drive sleeve is designed with spline teeth meshing with the outer splines of the sector gear shaft. It can be seen that the utility model can directly put the drive sleeve on the outer splines of the sector gear shaft through the spline teeth; the utility model also designs a pair of symmetrically distributed transmission screws on the side of the drive sleeve. When the machine tool rotates forward and reverse, the transmission rod on the main shaft contacts the transmission screw and drives the transmission screw to rotate, and the transmission screw drives the drive sleeve to rotate, and the drive sleeve drives the sector gear shaft to rotate, which constitutes the machine tool driving the sector gear shaft. The utility model is also provided with an end cover on the bottom surface of one side of the drive sleeve, and the end cover 3 is provided with a through hole 31 concentric with it; the diameter of the through hole 31 is larger than the small diameter of the top of the end face of the machine tool, and smaller than the large diameter of the top of the end face of the machine tool. During processing, the top of the machine tool end face passes through the through hole and supports one end of the sector gear shaft. The top of the machine tool end face is clamped with the through hole 31, and the driving sleeve is used to complete the clamping of the sector gear shaft on the machine tool.

[0007] As can be seen from the above, the utility model adopts a spline clamping structure, which effectively reduces the probability of the driving clamp falling off the sector gear shaft compared to the prior art, ensures the stability during the grinding process, improves the clamping effect of the sector gear shaft, and the operation of the driving sleeve is simple, convenient and low in difficulty. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a schematic diagram of the application structure of the utility model;

[0009] Figure 2 It is a structural schematic diagram of the utility model;

[0010] Figure 3 It is a rear view of the utility model;

[0011] Figure 4 It is a left side view of the utility model;

[0012] Figure 5 It is a top view of the utility model.

[0013] In the figure, the corresponding relationship between the component names and the figure numbers is as follows:

[0014] 1. Driving sleeve; 11. Spline teeth; 12. Threaded hole; 13. Groove; 2. Transmission screw; 3. End cover; 31. Through hole; 4. Sector gear shaft. DETAILED DESCRIPTION

[0015] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present invention.

[0016] In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0017] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0018] The present invention provides a special driving fixture for grinding the outer circle of a sector gear shaft, which includes a driving sleeve 1, a transmission screw 2, and an end cover 3. The driving sleeve 1 is a circular ring sleeve. The inner circular surface of the driving sleeve 1 is provided with spline teeth 11 distributed in a ring array, and the shape of the spline teeth 11 matches the external spline of the sector gear shaft 4. The driving sleeve 1 is directly sleeved on the external spline of the sector gear shaft 4 through the spline teeth 11.

[0019] The side surface of the driving sleeve 1 is provided with threaded holes 12 that match the transmission screw 2; the number of threaded holes 12 is two, and they are symmetrically distributed on both sides of the driving sleeve 1. The transmission screw 2 is threadedly connected to the threaded holes 12, and one end of the transmission screw 2 extends out of the driving sleeve 1. When the machine tool rotates forward and backward, the transmission rod on the main shaft contacts the transmission screw 2 and drives the transmission screw 2 to rotate. The transmission screw 2 then drives the driving sleeve to rotate, and the driving sleeve drives the sector gear shaft to rotate, constituting the driving rotation of the machine tool for the sector gear shaft.

[0020] On one side bottom surface of the driving sleeve 1, a circular groove 13 is provided, and the groove 13 is concentric with the driving sleeve 1. The end cover 3 is arranged in the groove 13, and the end cover 3 and the driving sleeve 1 are fixedly connected by screws. The end cover 3 is provided with a through hole 31 concentric with it; the diameter of the through hole 31 is 14 mm, and the major diameter of the machine tool end face center is 31 mm. It can be seen that the diameter of the through hole 31 is larger than the minor diameter of the machine tool end face center and smaller than the major diameter of the machine tool end face center. When the sector gear shaft 4 is subjected to external circle grinding, the machine tool end face center passes through the through hole 31 and contacts and abuts against one end of the sector gear shaft 4. The machine tool end face center is clamped with the through hole 31, and in cooperation with the driving sleeve 1, the clamping of the sector gear shaft 4 on the machine tool is realized.

[0021] As can be seen from the above, the utility model adopts a spline clamping structure. Compared with the prior art, the probability of the driving fixture falling off from the sector gear shaft is effectively reduced, the stability during the grinding process is ensured, and the clamping effect on the sector gear shaft is improved. The front and back of the driving sleeve 1 can be quickly judged through the end cover 3. Combined with the above spline clamping structure, the operation of the driving sleeve 1 during use is simple, convenient and has low difficulty.

[0022] The specific usage mode and function of this embodiment:

[0023] The utility model adopts manual operation. First, the bottom surface of the side of the driving sleeve 1 away from the end cover 3 is oriented towards the sector gear shaft 4, and it is sleeved on the external spline of the sector gear shaft 4 through the spline teeth 11; then, the machine tool end face center passes through the through hole 31 and contacts and abuts against one end of the sector gear shaft 4. The machine tool end face center is clamped with the through hole 31, and in cooperation with the driving sleeve 1, the clamping of the sector gear shaft 4 on the machine tool is completed. Subsequently, the machine tool is started to process the sector gear shaft 4; after the machine tool is started, the main shaft of the machine tool rotates, the transmission rod on the main shaft contacts the transmission screw 2 and drives the transmission screw 2 to rotate, the transmission screw 2 drives the driving sleeve to rotate, and the driving sleeve drives the sector gear shaft to rotate, constituting the driving rotation of the machine tool on the sector gear shaft.

[0024] When the external circle grinding of the sector gear shaft 4 is completed, the machine tool is operated to move the machine tool end face center to the outside of the driving sleeve 1 through the through hole 31, and then the operator can directly extract the sector gear shaft 4 from the driving sleeve 1.

[0025] In summary, compared with the prior art, the utility model effectively improves the clamping effect of the sector gear shaft and the operation convenience during its use.

Claims

1. A special drive fixture for grinding the outer cylindrical surface of a sector gear shaft, characterized in that: The invention comprises a driving sleeve (1), a driving screw (2) and an end cover (3); the driving sleeve (1) is a circular sleeve; the inner circumferential surface of the driving sleeve (1) is provided with spline teeth (11) distributed in a circular row; the side surface of the driving sleeve (1) is provided with a threaded hole (12) matched with the driving screw (2); the driving screw (2) is fastened to the side surface of the driving sleeve (1) by threadedly matching with the threaded hole (12); one end of the driving screw (2) extends out of the driving sleeve (1); a circular groove (13) is provided on the bottom surface of one side of the driving sleeve (1); the groove (13) is concentric with the driving sleeve (1); the end cover (3) is arranged in the groove (13), and the end cover (3) is fastened to the driving sleeve (1) by screws; the end cover (3) is provided with a through hole (31) concentric with the end cover (3).

2. The special drive fixture for grinding the outer cylindrical surface of a sector gear shaft according to claim 1, characterized in that: The threaded holes (12) are two in number and are symmetrically distributed on both sides of the drive sleeve (1); and a transmission screw (2) is provided at each of the threaded holes (12).

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