A double gear hole grinding clamping tool

Abstract

This utility model relates to a double-jointed gear internal grinding clamping fixture, including a connecting plate and a retainer. An end face support is installed at the end of the connecting plate. The connecting plate has a gear groove guiding structure and a gear groove clamping mechanism. A clamping steel ball assembly is installed on the retainer. An axial through-hole is located in the center of the connecting plate, and guide holes and clamping holes are evenly distributed radially. The gear groove guiding structure includes a positioning rod fixed in the guide hole, with its inner end being V-shaped and extending into the central through-hole of the connecting plate. The gear groove clamping mechanism includes a push rod slidably installed in the guide hole, with a steel ball sleeve installed at its inner end, and a first steel ball located at the inner end of the steel ball sleeve. One end of a spring coil is connected to the connecting plate, and the other end of the spring coil is connected to the outer end of the push rod. This utility model features a novel structure, automatic centering of the fixture, simple and convenient operation, saving auxiliary time and improving efficiency; it enhances the practicality and wide applicability of CNC internal grinding machines.

Description

Technical Field

[0001] This utility model belongs to the field of machining tooling technology, and relates to a clamping tooling for grinding double-tooth internal holes. Background Technology

[0002] Double gears are commonly used transmission components in various types of equipment, such as... Figure 1 As shown, the double-tooth joint has a through hole in the middle, and the two ends of the double-tooth joint are the first gear section and the second gear section, respectively. After heat treatment, the double-tooth joint deforms, causing shrinkage of the inner hole and misalignment of the hole axis. This results in poor coaxiality between the inner hole and the outer teeth of the double-tooth joint. Therefore, the inner hole of the double-tooth joint must be ground to correct the coaxiality between the inner hole and the outer teeth. Due to the relatively long length of the double-tooth joint, ordinary jigs cannot clamp this type of specimen, and the clamping method of the jig determines the machining accuracy of the specimen. Summary of the Invention

[0003] The purpose of this invention is to provide a double-tooth internal hole grinding clamping fixture that can solve the above-mentioned problems and improve work efficiency.

[0004] According to the technical solution provided by this utility model: a double-tooth internal hole grinding clamping fixture includes a connecting plate and a retainer. An end face support is installed at the end of the connecting plate. The connecting plate is provided with a tooth groove guide structure and a tooth groove clamping mechanism. A clamping steel ball assembly is installed on the retainer. An axial through hole is axially penetrating the middle of the connecting plate. Guide holes and clamping holes are evenly distributed radially on the connecting plate. The tooth groove guide structure includes a positioning rod, which is fixed in the guide hole. The inner end of the positioning rod is V-shaped and extends into the middle through hole of the connecting plate. The tooth groove clamping mechanism includes a push rod, which is slidably installed in the guide hole. A steel ball sleeve is installed at the inner end of the push rod, and a first steel ball is provided at the inner end of the steel ball sleeve. One end of the connecting plate is connected to a spring ring, and the other end of the spring ring is connected to the outer end of the push rod. The retainer includes a fixing ring, which is connected to an elastic ring. The elastic ring is composed of several clamping plates in a ring shape. A deformation gap is left between adjacent clamping plates. A single clamping plate is connected to the fixing ring through an intermediate plate.

[0005] As a further improvement of this utility model, the connecting disc is connected to the rotating shaft of the grinding machine.

[0006] As a further improvement of this utility model, the end face support is fixed to the inner end face of the connecting plate by the first screw.

[0007] As a further improvement of this utility model, the guide hole and the clamping hole are located on different planes.

[0008] As a further improvement of this utility model, the steel ball sleeve is provided with a chamber and an opening, a first steel ball is placed in the chamber, the end of the push rod is located in the chamber, the first steel ball is pressed against the inner wall of the chamber, and part of the first steel ball is exposed from the opening of the steel ball sleeve.

[0009] As a further improvement of this utility model, the push rod is installed in the guide hole by a sleeve, the sleeve is fixedly installed in the guide hole, and the push rod slides in the sleeve.

[0010] As a further improvement of this utility model, the number of clamping steel ball units is adapted to the number of teeth of the second gear of the double-toothed system.

[0011] As a further improvement of this utility model, the clamping steel ball assembly consists of several clamping steel ball units. Each clamping steel ball unit includes a second steel ball and a steel wire clamping plate with a first steel wire hole, a second steel wire hole, and a third steel wire screw hole. The first and second steel wire holes are arranged radially and are parallel to each other. The third steel wire screw hole is arranged axially and is perpendicular to the first and second steel wire holes. The steel wire is bent, with both ends located in the first and second steel wire holes, respectively. The middle part of the steel wire is located inside the elastic ring and fitted with a second steel ball. The second steel ball is attached to the inner side of the clamping plate. A third screw is threaded into the third steel wire screw hole. The end of the third screw contacts the steel wire and deforms it, thus fixing the steel wire in the clamping plate.

[0012] The positive and progressive effects of this utility model are as follows: This utility model features a novel structure, automatic centering of the fixture and tooling, simple and convenient operation, saving auxiliary time and improving work efficiency; it enhances the practicality and wide applicability of CNC internal grinding machines. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of the double-tooth joint of this utility model.

[0014] Figure 2 This is a side view of the present invention.

[0015] Figure 3 This is the front view of the present invention.

[0016] Figure 4 This is a cross-sectional view of the cage of this utility model.

[0017] Figure 5 This is a side view of the retainer of this utility model. Detailed Implementation

[0018] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0019] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention 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 invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0020] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this utility model described herein. Furthermore, terms such as "comprising" and "having" mean that in addition to those already listed in "comprising" and "having," other unlisted contents may also be included; for example, a process, method, system, product, or device may include a series of steps or units, not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products, or devices.

[0021] Due to the angle of the drawing, some parts may not be drawn, but their positions and connections can be understood from the text descriptions.

[0022] like Figures 2-3 As shown, this utility model is a double-tooth 19 internal hole grinding clamping tool, including a connecting plate 3 and a retainer 10. The end face support 13 is installed at the end of the connecting plate 3. The connecting plate 3 is provided with a tooth groove guide structure and a tooth groove clamping mechanism. The retainer 10 is equipped with a clamping steel ball assembly.

[0023] The connecting plate 3 is connected to the rotating shaft of the grinding machine. The end face support 13 is fixed to the inner end face of the connecting plate 3 by the first screw 1, which serves as an axial limit for the double teeth 19.

[0024] The connecting plate 3 has an axial through hole in the center, and guide holes and clamping holes are evenly distributed radially on the connecting plate 3. The guide holes and clamping holes are located in different planes.

[0025] The toothed guide structure includes a positioning rod 14, which is fixed in the guide hole by a fourth screw 15. The inner end of the positioning rod 14 is V-shaped and extends into the through hole in the middle of the connecting plate 3. The V-shape of the inner end of the positioning rod 14 is for guiding the first gear 19-1 of the double-tooth 19.

[0026] The toothed clamping mechanism includes a push rod 5, which is slidably installed in a guide hole. A steel ball sleeve 6 is installed at the inner end of the push rod 5, and a first steel ball 2 is provided at the inner end of the steel ball sleeve 6. The steel ball sleeve 6 has a chamber and an opening. The first steel ball 2 is placed in the chamber, and the end of the push rod 5 is located in the chamber, pressing the first steel ball 2 against the inner wall of the chamber. Part of the first steel ball 2 protrudes from the opening into the steel ball sleeve 6.

[0027] The push rod 5 is installed in the guide hole through the sleeve 4, and the sleeve 4 is fixedly installed in the guide hole. The push rod 5 slides in the sleeve 4.

[0028] To achieve automatic reset of push rod 5, connecting plate 3 is connected to one end of spring ring 17 via sixth screw 18, and the other end of spring ring 17 is connected to the outer end of push rod 5. Spring ring 17 provides an outward pushing force to push rod 5. In the non-working state, push rod 5 drives steel ball sleeve 6 and first steel ball 2 to leave the tooth groove of the first gear 19-1 of double gear 19, but push rod 5 does not disengage from sleeve 4.

[0029] like Figures 4-5 As shown, the retainer 10 includes a fixed ring 10-1, which is connected to an elastic ring. The elastic ring is composed of several clamping pieces 10-2 in a ring shape. A deformation gap 10-3 is left between adjacent clamping pieces 10-2. Each clamping piece 10-2 is connected to the fixed ring 10-1 through an intermediate piece 10-4.

[0030] The clamping ball assembly consists of several clamping ball units, the number of which matches the number of teeth on the second gear 19-2 of the double-tooth 19. Each clamping ball unit includes a second steel ball 12 and a steel wire 11. The clamping plate 10-2 has a first wire hole 10-21, a second wire hole 10-22, and a third wire threaded hole 10-23. The first and second wire holes 10-21 and 10-22 are radially arranged and parallel to each other, while the third wire threaded hole 10-23 is axially arranged and perpendicular to the first and second wire holes 10-21 and 10-22. The steel wires 11 are bent and intersecting. The two ends of the steel wires 11 are located in the first steel wire hole 10-21 and the second steel wire hole 10-22, respectively. The middle part of the steel wires 11 is located inside the elastic ring and is fitted with the second steel ball 12. The second steel ball 12 is attached to the inner side of the clamping plate 10-2. The third screw 9 is threaded in the third steel wire screw hole 10-23. The end of the third screw 9 contacts the steel wires 11 and deforms them, thus fixing the steel wires 11 in the clamping plate 10-2.

[0031] The toothed clamping mechanism and the outer periphery of the retainer 10 are respectively provided with a first clamping mechanism and a second clamping mechanism. In this embodiment, the first clamping mechanism and the second clamping mechanism are respectively a first pawl and a second pawl. The first pawl can push the push rod 5 to move towards the center of the connecting plate 3, and the second pawl pushes the elastic ring composed of clamping plates 10-2 to tighten towards the center.

[0032] Working principle and process of this utility model: From the appendix Figure 2 and attached Figure 3 It is known that when clamping the double gear 19, the assembled retainer 10 is first pushed along the gear part with a smaller outer diameter to the gear part with a larger outer diameter (in this embodiment, the radial dimension of the first gear part 19-1 of the double gear 19 is larger than that of the second gear part 19-2, so the assembled retainer 10 is pushed along the second gear part 19-2 into the first gear part 19-1), so that the left end face of the retaining ring 10-1 of the retainer 10 rests on the right end face of the gear part (first gear part 19-1) with a larger outer diameter of the double gear 19, and then the double gear 19 and the retainer 10 are installed together into the connecting plate 3; during this process, the tooth groove of the first gear part 19-1 moves to the left along the positioning rod 14 until the left end face of the first gear part 19-1 rests on the right positioning end face of the end face support 13. Then, the first jaw moves the push rod 5, the steel ball sleeve 6, and the first steel ball 2 along the inner hole of the sleeve 4 towards the center, causing the first steel ball 2 to enter the tooth groove of the first gear part 19-1 until the first steel ball 2 is pressed against the tooth surface, thereby achieving the effect of clamping the first gear part 19-1. At the same time, the second jaw clamps the elastic ring (the three jaws are in contact with the three clamping plates 10-2 respectively). At this time, under the action of elastic deformation, the second steel ball 12 on the retainer 10 clamps the second gear part 19-2. Finally, the special tooling achieves the effect of simultaneously clamping the left and right sides of the double gear 19.

[0033] It is understood that the above embodiments are merely exemplary implementations used to illustrate the principles of this utility model, and the utility model is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of this utility model, and these modifications and improvements are also considered to be within the protection scope of this utility model.

Claims

1. A clamping fixture for grinding double-tooth internal holes, characterized in that, The device includes a connecting plate (3) and a retainer (10). An end face support (13) is installed at the end of the connecting plate (3). The connecting plate (3) is provided with a toothed guide structure and a toothed clamping mechanism. A clamping steel ball assembly is installed on the retainer (10). The connecting plate (3) has an axial through hole in the middle and guide holes and clamping holes are evenly distributed radially. The toothed guide structure includes a positioning rod (14), which is fixed in the guide hole. The inner end of the positioning rod (14) is V-shaped and extends into the middle through hole of the connecting plate (3). The toothed clamping mechanism includes a push rod (5), which is slidably installed on the guide. In the hole, a steel ball sleeve (6) is installed on the inner end of the push rod (5), and a first steel ball (2) is provided on the inner end of the steel ball sleeve (6); the connecting plate (3) is connected to one end of the spring ring (17), and the other end of the spring ring (17) is connected to the outer end of the push rod (5); the retainer (10) includes a fixed ring (10-1), the fixed ring (10-1) is connected to an elastic ring, the elastic ring is composed of several clamping pieces (10-2) in a ring shape, and a deformation gap (10-3) is left between adjacent clamping pieces (10-2), and a single clamping piece (10-2) is connected to the fixed ring (10-1) through an intermediate piece (10-4).

2. The double-tooth internal hole grinding clamping fixture as described in claim 1, characterized in that, The connecting plate (3) is connected to the rotating shaft of the grinding machine.

3. The double-tooth internal hole grinding clamping fixture as described in claim 1, characterized in that, The end face support (13) is fixed to the inner end face of the connecting plate (3) by the first screw (1).

4. The double-tooth internal hole grinding clamping fixture as described in claim 1, characterized in that, The guide hole and the clamping hole are located on different planes.

5. The double-tooth internal hole grinding clamping fixture as described in claim 1, characterized in that, The steel ball sleeve (6) has a chamber and an opening. The first steel ball (2) is placed in the chamber. The end of the push rod (5) is located in the chamber, and the first steel ball (2) is pressed against the inner wall of the chamber. Part of the first steel ball (2) is exposed from the opening of the steel ball sleeve (6).

6. The double-tooth internal hole grinding clamping fixture as described in claim 1, characterized in that, The push rod (5) is installed in the guide hole through the sleeve (4), the sleeve (4) is fixedly installed in the guide hole, and the push rod (5) slides in the sleeve (4).

7. The double-tooth internal hole grinding clamping fixture as described in claim 1, characterized in that, The number of clamping steel ball units is matched with the number of teeth of the second gear (19-2) of the double-tooth (19).

8. The double-tooth internal hole grinding clamping fixture as described in claim 1, characterized in that, The clamping steel ball assembly consists of several clamping steel ball units, each including a second steel ball (12) and a steel wire (11). A clamping plate (10-2) has a first steel wire hole (10-21), a second steel wire hole (10-22), and a third steel wire screw hole (10-23). ​​The first steel wire hole (10-21) and the second steel wire hole (10-22) are radially arranged and parallel to each other, while the third steel wire screw hole (10-23) is axially arranged. The third steel wire screw hole (10-23) is parallel to the first steel wire hole (10-21) and the second steel wire hole (10-22). 0-22) The steel wires (11) are bent and intersected vertically. The two ends of the steel wires (11) are located in the first steel wire hole (10-21) and the second steel wire hole (10-22) respectively. The middle part of the steel wire (11) is located inside the elastic ring and is fitted with a second steel ball (12). The second steel ball (12) is attached to the inner side of the clamping plate (10-2). The third screw (9) is installed in the thread of the third steel wire screw hole (10-23). ​​The end of the third screw (9) contacts the steel wire (11) and deforms it, fixing the steel wire (11) in the clamping plate (10-2).

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