Grinding machine eccentric chuck

Abstract

The utility model discloses a grinding machine eccentric chuck which comprises a grinding machine positioning disc, a grinding machine positioning through hole used for being connected with a grinding machine main shaft is formed in the center of the grinding machine positioning disc, and a fixing base perpendicular to one end face of the grinding machine positioning disc is arranged at the front end of the grinding machine positioning disc. A clamping groove used for clamping the positioning shaft is formed in the fixing base, kidney-shaped through holes are formed in the two sides, opposite to the fixing base, of the grinding machine positioning disc respectively, a first positioning screw is arranged in each kidney-shaped through hole, a positioning pressing plate is arranged above the fixing base, and a second positioning screw is arranged in each first positioning screw. And the positioning pressing plate is locked on the fixed seat through two locking screws. According to the structure, the longitudinally-formed kidney-shaped through hole is additionally formed and matched with the first positioning screw to be locked on the grinding machine main shaft, so that the adjusting range of the whole eccentricity is wider, eccentric wheels of different sizes can be positioned and clamped, and finally the universality of the chuck is improved.

Description

Technical Field

[0001] This utility model belongs to the technical field of sewing machine spindle connecting rod processing accessories, and in particular relates to an eccentric chuck for a grinding machine. Background Technology

[0002] Eccentric wheel 1 is also called eccentric ball, such as Figure 1 As shown, the eccentric wheel 1 is one of the most important components of a sewing machine. Before installing the eccentric wheel 1 into the connecting rod, its circumferential surface needs to be ground using a grinding machine. The current procedure is as follows: First, the through hole 101 of the eccentric wheel 1 is installed onto a positioning shaft 2. Then, an eccentric groove 201 is drilled on each end face of the positioning shaft 2 (ensuring that the offset of the eccentric groove 201 is consistent with the eccentricity of the through hole 101 on the eccentric wheel 1), forming an eccentric rod. Then, two symmetrical clamps are used, one rotatably mounted on a grinding machine and the other mounted on a chuck of the grinding machine, to clamp the eccentric rod. Due to the eccentricity... The eccentric groove point 201 on the bar is eccentrically set to ensure that it is in the same center as the rotating spindle of the grinding machine. Therefore, as the grinding machine spindle rotates, it can avoid the problem of product damage caused by the eccentric rotation of the eccentric wheel 1 affecting the subsequent grinding of the eccentric wheel 1 in the circumferential direction. However, this structure requires that when an eccentric groove point 201 is made on both ends of the positioning shaft 2, the eccentricity of the through hole 101 on the eccentric wheel 1 must exceed the eccentricity of the eccentric groove point 201 on the end face of the positioning shaft 2. If the eccentric groove point 201 cannot be made on the end face of the positioning shaft 2 at this time, this clamping method cannot be realized. Therefore, this operation method cannot achieve universality and needs to be improved. Utility Model Content

[0003] The purpose of this invention is to provide an eccentric chuck for grinding machines, which solves the problem of poor versatility in existing eccentric wheel positioning and clamping systems.

[0004] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0005] This utility model relates to an eccentric chuck for a grinding machine, comprising a grinding machine positioning plate. The center of the grinding machine positioning plate is provided with a grinding machine positioning through hole for connecting with the grinding machine spindle. The front end of the grinding machine positioning plate is provided with a fixing seat perpendicular to one end face of the grinding machine positioning plate. The fixing seat is provided with a clamping groove for clamping the positioning shaft. The grinding machine positioning plate is provided with an oblong through hole on each side relative to the fixing seat. A positioning screw is provided in each oblong through hole. A positioning pressure plate is provided above the fixing seat. The positioning pressure plate is locked to the fixing seat by two locking screws.

[0006] Preferably, the clamping groove has a triangular structure in order to clamp positioning shafts of different diameters.

[0007] As preferred, in order to clamp the positioning shaft, the lower surface of the positioning plate is provided with a semicircular groove, and a silica gel layer is arranged in the semicircular groove.

[0008] As preferred, in order to clamp the positioning shaft, the lower surface of the positioning plate is provided with a semicircular groove, and a silica gel layer is arranged in the semicircular groove.

[0009] As preferred, in order to improve the connection performance of the grinder positioning disc and the main shaft of the grinder, an electromagnet is arranged in the grinder positioning disc, a wiring plug electrically connected with the electromagnet is arranged on the side of the grinder positioning disc, and a metal disc connected with the electromagnet is arranged on the back of the grinder positioning disc.

[0010] As preferred, in order to facilitate the disassembly of the fixing seat, the fixing seat is connected with the fixing seat through two positioning screws.

[0011] As preferred, in order to avoid exposure of the screw, a screw through hole is arranged on the grinder positioning disc, the screw through hole is arranged away from the end of the fixing seat, and an end cover is arranged on the end of the fixing seat.

[0012] The utility model has the advantages that: the waist-shaped through hole arranged in the longitudinal direction is additionally arranged on the grinder positioning disc, the positioning screw is locked on the main shaft of the grinder, the adjustment range of the eccentricity is wider, different sizes of eccentric wheels can be positioned and clamped, and the universality of the chuck is improved. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a structural schematic view of the existing eccentric wheel;

[0014] Figure 2 It is a combined structural schematic view when the existing eccentric wheel is installed on the positioning shaft;

[0015] Figure 3 It is a structural perspective view of the grinder eccentric chuck in embodiment 1;

[0016] Figure 4 It is a side view of the grinder eccentric chuck in embodiment 1 without the installation of the positioning screw one;

[0017] Figure 5 It is a front view of the grinder eccentric chuck in embodiment 1 without the installation of the positioning screw one;

[0018] Figure 6 It is a front view of the grinder eccentric chuck in embodiment 2 without the installation of the positioning screw one;

[0019] Figure 7Figure 2 is a front view of the eccentric chuck of the grinding machine of Figure 1 without the installation of the positioning screw one at one time according to an embodiment of the present application;

[0020] Figure 8 Figure 2 is a front view of the eccentric chuck of the grinding machine of Figure 1 without the installation of the positioning screw one at one time according to an embodiment of the present application; Figure 7 Figure 2 is a front view of the eccentric chuck of the grinding machine of Figure 1 without the installation of the positioning screw one at one time according to an embodiment of the present application;

[0021] Figure 9 Figure 2 is a front view of the eccentric chuck of the grinding machine of Figure 1 without the installation of the positioning screw one at one time according to an embodiment of the present application;

[0022] Figure 10 Figure 2 is a front view of the eccentric chuck of the grinding machine of Figure 1 without the installation of the positioning screw one at one time according to an embodiment of the present application;

[0023] Figure 11 Figure 2 is a front view of the eccentric chuck of the grinding machine of Figure 1 without the installation of the positioning screw one at one time according to an embodiment of the present application.

[0024] Reference signs:

[0025] eccentric wheel 1, through hole 101, positioning shaft 2, eccentric groove point 201, grinding machine positioning disc 3, grinding machine positioning through hole 4, fixing seat 5, clamping groove 6, waist-shaped through hole 7, positioning screw one 8, positioning pressing plate 9, locking screw 10, semicircular arc groove 11, silica gel layer 12, semicircular arc chuck 13, rotating shaft 14, hinged seat 15, electromagnet 16, wiring plug 17, metal disc 18, positioning screw two 19, screw through hole 20, end cover 21. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme of the embodiments of the present application will be described below in a clear and complete manner. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0027] In the description of the present application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like 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 application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0028] In addition, the terms "first", "second", "third", etc. are used only for descriptive purposes and should not be construed as implying or implying a relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first", "second", etc. can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0029] Embodiment 1

[0030] Please refer to Figures 3-5 As shown in the drawings, the eccentric chuck of the grinding machine disclosed in the embodiment comprises a grinding machine positioning disc 3, a grinding machine positioning through hole 4 for connecting with the grinding machine spindle is arranged at the center of the grinding machine positioning disc 3, a fixed seat 5 perpendicular to one end face of the grinding machine positioning disc 3 is arranged at the front end of the grinding machine positioning disc 3, a clamping groove 6 for clamping and positioning the shaft 2 is arranged on the fixed seat 5, a waist-shaped through hole 7 is arranged on both sides of the grinding machine positioning disc 3 relative to the fixed seat 5, and a positioning screw 8 is arranged in each waist-shaped through hole 7, a positioning pressing plate 9 is arranged above the fixed seat 5, and the positioning pressing plate 9 is locked on the fixed seat 5 by two locking screws 10.

[0031] As a preferred, in order to clamp the positioning shaft 2 with different diameters, the clamping groove 6 is triangular structure, in this embodiment, since the clamping groove 6 is triangular, the positioning shaft 2 with different diameters can be clamped, and the versatility of the whole equipment is further improved.

[0032] The structure is characterized in that a specific grinding machine positioning disc 3 is arranged, a fixed seat 5 is arranged at an eccentric position at the front end of the grinding machine positioning disc 3, a clamping groove 6 for placing a positioning shaft 2 is arranged above the fixed seat 5, then the positioning shaft 2 is pressed in the clamping groove 6 by using an upper positioning pressing plate 9, then the whole chuck is placed at the front end of the grinding machine main shaft, then two positioning screws 8 pass through corresponding waist-shaped through holes 7 and are aligned with screw holes at the front end of the grinding machine main shaft, when locked, the position of the positioning screw 8 in the waist-shaped through hole 7 is adjusted according to the eccentric amount of the eccentric wheel 1, after adjustment, the positioning screw 8 is locked with the screw hole at the front end of the grinding machine main shaft, and the eccentric amount is adjusted by moving up and down in the waist-shaped through hole 7; it should be noted that when adjusting the eccentric amount, the positioning shaft 2 can rotate in the clamping groove 6 until the eccentric angle is adjusted and then locked by a locking screw 10, but the positioning shaft 2 is fixed in the V-shaped groove hole of the clamping groove 6; once locked, the grinding machine positioning disc 3 is installed at the front end of the grinding machine main shaft by using the eccentricity, and finally the eccentric amount of the eccentric wheel 1 is offset, so that the rotating track of the whole eccentric wheel 1 is circular when the grinding machine main shaft rotates, and the eccentric rotation caused by the eccentricity of the eccentric wheel 1 does not affect the grinding effect of the grinding wheel, and the structure is characterized in that the waist-shaped through hole 7 arranged in the longitudinal direction is locked on the grinding machine main shaft by cooperating with the positioning screw 8, so that the adjustment range of the whole eccentric amount is wider, the eccentric wheel 1 of different sizes can be positioned and clamped, and the universality of the chuck is finally improved.

[0033] Embodiment 2

[0034] Please refer to Figure 6 The embodiment discloses a grinding machine eccentric chuck, and the structure is the same as that of the embodiment 1, and the difference is that, as preferred, in order to conveniently clamp the positioning shaft 2, a semicircular groove 11 is arranged on the lower surface of the positioning pressing plate 9, and a silica gel layer 12 is arranged in the semicircular groove 11, so that the silica gel layer 12 can prevent the positioning shaft 2 from being damaged during clamping and can better clamp the positioning shaft 2.

[0035] Embodiment 3

[0036] Please refer to Figures 7-8As shown in the figure, the overall structure of the eccentric chuck of the grinding machine disclosed in this embodiment is the same as that of embodiment 1, except that, as a preferred embodiment, in order to facilitate clamping the positioning shaft 2, the lower surface of the positioning pressing plate 9 is provided with a semicircular arc chuck 13, the upper end of the semicircular arc chuck 13 is hinged to the hinge seat 15 on the lower surface of the positioning pressing plate 9 through a hinge shaft 14. In this embodiment, by adding the semicircular arc chuck 13, and hinging the semicircular arc chuck 13 to the hinge seat 15, when the positioning pressing plate 9 is pressed down, it can ensure that the groove below the semicircular arc chuck 13 can be better pressed against the corresponding positioning shaft 2, so that it is then locked by the locking screw 10, and finally it can better clamp the positioning shaft 2.

[0037] Embodiment 4

[0038] As shown in the figure, Figures 9-10 As shown in the figure, the overall structure of the eccentric chuck of the grinding machine disclosed in this embodiment is the same as that of embodiment 1, except that, as a preferred embodiment, in order to realize stronger connection performance between the grinding machine positioning disc 3 and the main shaft of the grinding machine, the grinding machine positioning disc 3 is provided with an electromagnet 16 inside, the side of the grinding machine positioning disc 3 is provided with a wire plug 17 electrically connected to the electromagnet 16, and the back of the grinding machine positioning disc 3 is provided with a metal disc 18 connected to the electromagnet 16. When working, first place the entire chuck in front of the main shaft of the grinding machine, then pass two positioning screws 18 through the corresponding waist-shaped through hole 7, and lock them in the screw hole provided at the front end of the main shaft of the grinding machine to fix the entire chuck. After fixing, connect the power supply to the wire plug 17, press the corresponding switch, at this time the electromagnet 16 has magnetism after being powered, then make the two metal discs 18 have magnetism, finally ensure that the metal disc 18 is magnetically connected with the main shaft of the grinding machine (the main shaft is made of metal), and further improve the connection performance between the entire chuck and the main shaft of the grinding machine.

[0039] Embodiment 5

[0040] As shown in the figure, Figure 11 As shown in the figure, the overall structure of the eccentric chuck of the grinding machine disclosed in this embodiment is the same as that of embodiment 1, except that, as a preferred embodiment, in order to facilitate clamping the positioning shaft 2, the lower surface of the positioning pressing plate 9 is provided with a semicircular arc chuck 13, the upper end of the semicircular arc chuck 13 is hinged to the hinge seat 15 on the lower surface of the positioning pressing plate 9 through a hinge shaft 14. In this embodiment, by adding the semicircular arc chuck 13, and hinging the semicircular arc chuck 13 to the hinge seat 15, when the positioning pressing plate 9 is pressed down, it can ensure that the groove below the semicircular arc chuck 13 can be better pressed against the corresponding positioning shaft 2, so that it is then locked by the locking screw 10, and finally it can better clamp the positioning shaft 2.

[0041] As a preferred embodiment, in order to avoid exposing the screws, screw through holes 20 are provided on the grinding machine positioning disc 3 for the positioning screws 19 to pass through, and end covers 21 are provided at the end of the screw through holes 20 away from the fixing seat 5. The above structure facilitates the later disassembly of the fixing seat 5, avoids the positioning screws 19 from being exposed outside and affecting the appearance, and can be shielded by adding end covers 21. At the same time, the setting of the end covers 21 ensures the overall flatness of the side of the grinding machine positioning disc 3 close to the grinding machine.

[0042] The above are only preferred embodiments of the present application, and do not limit the present application, any modification to the technical solutions recorded in the foregoing embodiments, equivalent replacement of part of the technical features, any modification, equivalent replacement, improvement made, all belong to the protection scope of the present application.

Claims

1. An off-center chuck for a grinding machine, characterized by: The grinding machine positioning disc (3) is provided with a grinding machine positioning hole (4) in the center for connecting with the main shaft of the grinding machine, the front end of the grinding machine positioning disc (3) is provided with a fixed seat (5) perpendicular to one end surface of the grinding machine positioning disc (3), the fixed seat (5) is provided with a clamping groove (6) for clamping the positioning shaft (2), the grinding machine positioning disc (3) is provided with a waist-shaped hole (7) on both sides relative to the fixed seat (5), a positioning screw (8) is arranged in each waist-shaped hole (7), the fixed seat (5) is provided with a positioning pressing plate (9) above, and the positioning pressing plate (9) is locked on the fixed seat (5) by two locking screws (10).

2. The eccentric chuck for a grinding machine according to claim 1, wherein: The clamping groove (6) is triangular in structure.

3. A grinder eccentric chuck according to claim 1 or 2, characterized in that: The lower surface of the positioning pressing plate (9) is provided with a semicircular arc groove (11), and the semicircular arc groove (11) is provided with a silica gel layer (12).

4. The eccentric chuck for a grinding machine of claim 2, wherein: The lower surface of the positioning pressing plate (9) is provided with a semicircular arc chuck (13), and the upper end of the semicircular arc chuck (13) is hinged to the hinge seat (15) of the lower surface of the positioning pressing plate (9) through a rotating shaft (14).

5. The eccentric chuck for a grinding machine of claim 1, wherein: The grinding machine positioning disc (3) is provided with an electromagnet (16) inside, the side of the grinding machine positioning disc (3) is provided with a wire plug (17) electrically connected with the electromagnet (16), and the back of the grinding machine positioning disc (3) is provided with a metal disc (18) connected with the electromagnet (16).

6. The eccentric chuck for a grinding machine of claim 1, wherein: The fixed seat (5) is connected with the fixed seat (5) through two positioning screws (19) passing through the grinding machine positioning disc (3).

7. A centerless grinder eccentric chuck according to claim 6, characterized in that: A screw hole (20) is arranged on the grinding machine positioning disc (3) to facilitate the positioning screw (19) to pass through, and an end cover (21) is arranged at the end away from the fixed seat (5) of the screw hole (20). A screw hole (20) is arranged on the grinding machine positioning disc (3) to facilitate the positioning screw (19) to pass through, and an end cover (21) is arranged at the end away from the fixed seat (5) of the screw hole (20).

Images