Flat shaft hole machining and positioning device of supporting shaft

Abstract

The utility model discloses a machining and positioning device for a flat shaft hole of a supporting shaft. The machining and positioning device comprises a clamp body, a drill bushing, a movable pressing plate, a first knurled screw and a second knurled screw. A to-be-machined supporting shaft blank piece is longitudinally arranged on the inner side of the clamp body in a penetrating mode. A hollow drill bushing is vertically inserted into the upper part of the clamp body; the drill bushing is located over the shaft flat part of the supporting shaft blank piece. The right side of the clamp body is in threaded connection with the first knurled screw; the first knurled screw is used for leftwards jacking and supporting the shaft outer circle end face on the right side of the shaft flat part of the shaft blank; the front end of the lower portion of the clamp body is hinged to the lower end of the movable pressing plate. The upper end of the movable pressing plate is in threaded connection with a longitudinally distributed second knurled screw; and the second knurled screw is used for backwards pressing and supporting the workpiece front end face on the front side of the shaft flat part of the shaft blank. The positioning device can conveniently and reliably position a supporting shaft blank to be machined, the pressing effect is guaranteed, the shaft hole machining positioning requirement of a supporting shaft is met, and the machining quality is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical processing, in particular to a positioning device for processing a flat shaft hole of a support shaft. Background Art

[0002] See also Figures 1a to 1d As shown, the support shaft 1 is a common shaft-type part that plays a connecting role in mechanical products. The workpiece symmetry center is the workpiece axis 107. The front end of the support shaft 1 is provided with a shaft flat portion 100. The front side surface of the shaft flat portion 100 is the workpiece front end surface 106. The upper and lower sides of the shaft flat portion 100 are provided with two flat end surfaces 101 that are symmetrical up and down. The rear end of the support shaft 1 is provided with a threaded rod 103. The shaft flat portion 100 and the threaded rod 103 are connected to each other and are located on the same longitudinal axis. The left and right sides of the shaft flat portion 100 have arc-shaped shaft outer circular end surfaces 105. The rear end surface of the shaft flat portion 100 is a shaft shoulder positioning end surface 104. A shaft hole 102 that vertically passes through the shaft flat portion 100 is provided at a straight line distance L (for example, an actual size of 10 mm) from the shaft shoulder positioning end surface 104 (that is, the distance between the center point of the shaft hole 102 and the shaft shoulder positioning end surface 104 is L);

[0003] See also Figures 2a to 2d As shown, in order to process the shaft hole 102 in the support shaft blank 1-0 to obtain the finished support shaft 1 (the difference between the support shaft blank 1-0 and the finished support shaft 1 is that there is no shaft hole 102, and the rest are the same), it is necessary to use the shaft shoulder positioning end face 104, the shaft outer circular end face 105 and the flat end face 101 on one side of the shaft flat part 100 to position, and then perform the shaft hole processing operation. At this time, a clamping structure needs to be set on the opposite side of the workpiece positioning surface.

[0004] However, since the distance A between the front end face 106 of the workpiece and the shaft shoulder 104 is small (only 18 mm in length), the space above the workpiece is limited and can only accommodate one drill sleeve (the drill sleeve is used to determine the position of the hole to be processed on the workpiece, guide the tool for processing, and improve the rigidity of the tool during processing and prevent vibration during processing). The existing technology cannot set a clamping structure. If it is pressed from the direction of the outer cylindrical end face 105 of the shaft, since the workpiece has a tendency to warp upward, it will cause the workpiece to flip and warp when processing the shaft hole, resulting in processing failure, forming waste, causing serious economic losses, and great processing difficulty. Utility Model Content

[0005] The purpose of the utility model is to provide a positioning device for machining a flat shaft hole of a support shaft in response to the technical defects of the prior art.

[0006] To this end, the utility model provides a device for machining and positioning a flat shaft hole of a support shaft, comprising a clamping body, a drill sleeve, a movable pressing plate, a first knurled screw and a second knurled screw;

[0007] A supporting shaft blank to be processed is longitudinally provided on the inner side of the clamping body;

[0008] A hollow drill sleeve is vertically inserted into the upper part of the concrete;

[0009] The drill sleeve is located just above the flat portion of the support shaft blank;

[0010] The right side of the clamp body is threadedly connected to the first knurled screw distributed laterally;

[0011] The first knurled screw is used to tighten the outer circular end surface of the shaft on the right side of the flat portion of the supporting shaft blank to the left;

[0012] The front end of the lower part of the clamping body is hinged to the lower end of the movable pressing plate;

[0013] The upper end of the movable pressing plate is threadedly connected to a second knurled screw distributed longitudinally;

[0014] The second knurled screw is used to rotate and move the movable pressure plate, and to press the front end surface of the workpiece on the front side of the flat part of the supporting shaft blank backward.

[0015] It can be seen from the technical solution provided by the above utility model that compared with the existing technology, the utility model provides a device for processing and positioning the shaft hole on the flat part of the support shaft. Its structural design is scientific, and it can conveniently and reliably position the support shaft blank to be processed, ensuring the clamping effect, which is conducive to further processing operations on the shaft hole on the flat part of the workpiece to be processed (i.e., the support shaft blank), meeting the shaft hole processing and positioning requirements of the support shaft, ensuring the processing quality, and has great practical significance.

[0016] For the utility model, the support shaft blank to be processed is pressed by the first knurled screw located on the side, and the pressing position is at a position slightly above the axis of the support shaft blank. By adopting a positioning and pressing structure that cooperates with the outer circle positioning surface of the shaft on the workpiece positioning hole, it can effectively promote the close contact between the workpiece to be processed and the positioning surface, and can effectively prevent the upward warping tendency of the workpiece.

[0017] The utility model adopts a rotary movable pressing plate pressing structure, which is conducive to the rapid disassembly and assembly of workpieces.

[0018] By applying the utility model, the problem of positioning the shaft hole in the flat part of the shaft workpiece (specifically the support shaft) can be solved. The utility model is convenient and quick to operate, which is beneficial to improving the processing accuracy and improving the processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1a : Schematic diagram of the three-dimensional structure of the support shaft;

[0020] Figure 1b : Top view of the support shaft after processing;

[0021] Figure 1c : Front view of the support shaft after machining;

[0022] Figure 1d : Right view of the finished support shaft;

[0023] Figure 2a : Schematic diagram of the three-dimensional structure of the support shaft blank with the shaft hole to be machined; Figure 2b : Top view of the support shaft blank with the shaft hole to be machined;

[0024] Figure 2c : Front view of the support shaft blank with the shaft hole to be machined;

[0025] Figure 2d : Right view of the support shaft blank with the shaft hole to be machined;

[0026] Figure 3 : A schematic diagram of the three-dimensional structure of a support shaft flat hole processing and positioning device provided by the utility model when pressing and positioning a support shaft blank;

[0027] Figure 4a : A device for machining and positioning a flat shaft hole of a support shaft provided by the present invention, a front view of a support shaft blank being pressed and positioned;

[0028] Figure 4b : A left view of a support shaft blank being pressed and positioned by a device for machining a flat shaft hole provided by the present invention;

[0029] Figure 4c : A top view of a support shaft blank being pressed and positioned by a device for machining a flat shaft hole provided by the present invention;

[0030] Figure 5a : A schematic diagram of the three-dimensional structure of a support shaft flat hole processing and positioning device provided by the utility model when a support shaft blank is pressed and positioned, and the movable pressure plate and knurled screw are removed in this figure;

[0031] Figure 5b : A schematic diagram of the three-dimensional structure of a support shaft flat hole processing and positioning device provided by the utility model when the support shaft blank is placed;

[0032] Figure 5c : A schematic diagram of the three-dimensional structure of a support shaft flat hole processing and positioning device provided by the utility model when the support shaft blank is not placed;

[0033] Figure 6a : A schematic diagram of the three-dimensional structure of a support shaft flat hole processing and positioning device provided by the present invention when the support shaft blank is not placed;

[0034] Figure 6b : A front view of a device for machining and positioning a flat shaft hole of a support shaft provided by the present invention when a support shaft blank is not placed therein;

[0035] Figure 6c : A right side view of a positioning device for machining a flat shaft hole of a support shaft provided by the present invention when the support shaft blank is not placed;

[0036] Figure 6d : A top view of a device for machining and positioning a flat shaft hole of a support shaft provided by the present invention when a support shaft blank is not placed therein;

[0037] Figure 7a : A front view of a clamping structure in a device for machining and positioning a flat shaft hole of a support shaft provided by the present invention;

[0038] Figure 7b : The utility model provides a support shaft flat shaft hole processing and positioning device, the clamping concrete right view;

[0039] Figure 7c : A rear view of a clamping structure in a device for machining and positioning a flat shaft hole of a support shaft provided by the present invention;

[0040] Figure 7d : A top view of a specific clamp in a device for machining and positioning a flat shaft hole of a support shaft provided by the present invention;

[0041] Figure 7e : Schematic diagram of the matching state with the support shaft blank if the open surface of the workpiece positioning hole is not tangent to the outer circle positioning surface of the shaft (hypothetical situation, contrary to the actual situation of this patent);

[0042] Figure 7f : Schematic diagram of the direction of the pressing force applied by the first knurled screw located on the side surface of the clamp body to the workpiece to be processed (i.e., the support shaft blank);

[0043] Figure 8 : A three-dimensional view of the front side of the clamping body in a device for machining and positioning a flat shaft hole of a support shaft provided by the present invention;

[0044] Figure 9 : A three-dimensional view of the back side of the clamp body in a device for machining and positioning a flat shaft hole of a support shaft provided by the present invention;

[0045] Figure 10 : A structural diagram of a drill sleeve;

[0046] Figure 11a : A schematic diagram of the front structure of a movable pressing plate in a device for machining and positioning a flat shaft hole of a support shaft provided by the present invention;

[0047] Figure 11b : A left view of a movable pressing plate in a device for machining and positioning a flat shaft hole of a support shaft provided by the present invention;

[0048] Figure 12a : A schematic structural diagram of a first knurled screw in a device for machining and positioning a flat shaft hole of a support shaft provided by the present invention;

[0049] Figure 12b : A schematic structural diagram of the second knurled screw in a device for machining and positioning a flat shaft hole of a support shaft provided by the present invention;

[0050] Figure 13 : A schematic structural diagram of a shoulder positioning plate in a flat shaft hole machining and positioning device for a support shaft provided by the present invention;

[0051] Figure 14 : A schematic structural diagram of a pin in a device for machining and positioning a flat shaft hole of a support shaft provided by the present invention;

[0052] In the figure, 1. Support shaft; 1-0. Support shaft blank;

[0053] 100. Shaft flat portion; 101. Flat end face; 102. Shaft hole; 103. Threaded rod; 104. Shaft shoulder positioning end face; 105. Shaft outer cylindrical end face; 106. Workpiece front face; 107. Workpiece axis;

[0054] 2. Clamping base; 201. Workpiece positioning hole; 202. Shaft outer cylindrical positioning surface; 203. Open surface; 204. Flat positioning surface; 205. Drill sleeve hole;

[0055] 206. Chip removal hole; 207. Center of the clamping body; 208. Positioning plate mounting slot; 209. Upper end face of the workpiece positioning hole; 210. Right end face of the positioning hole;

[0056] 211. Side knurled screw mounting hole; 212. Boss; 213. Movable pressure plate mounting slot; 214. Pin hole; 215. Pressure plate rotating arc slot; 216. Slot bottom; 217. Slot end arc surface;

[0057] 3. Drill sleeve; 4. Movable pressure plate;

[0058] 401. Pressure plate pin hole; 402. Pressure plate arc surface; 403. Pressure plate knurled screw mounting hole;

[0059] 51. First knurled screw; 52. Second knurled screw;

[0060] 501. Knurled big end; 502. Locking thread; 503. Clamping post;

[0061] 6. Shoulder positioning plate; 601. Shoulder positioning surface; 602. Screw hole; 603. Threaded rod hole;

[0062] 7. Pin. DETAILED DESCRIPTION

[0063] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0064] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0065] In the description of this patent, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," "connected," and "set" should be understood in a broad sense. For example, they can refer to fixed connection or set, detachable connection or set, or integral connection or set. Those skilled in the art will understand the specific meanings of the above terms in this patent based on the specific circumstances.

[0066] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0067] See also Figures 1a to 1d 、 Figures 2a to 2d 、 Figure 3 、 Figures 4a to 4c 、 Figures 5a to 5c 、 Figures 6a to 6d 、 Figures 7a to 7f、 Figures 8 to 10 、 Figures 11a to 11b 、 Figures 12a to 12b 、 Figures 13 and 14 The utility model provides a device for machining and positioning a flat shaft hole of a support shaft, comprising: a clamping body 2, a drill sleeve 3, a movable pressing plate 4, a first knurled screw 51 and a second knurled screw 52;

[0068] The inner side of the clamp body 2 is provided with a support shaft blank 1-0 to be processed running through the longitudinal direction;

[0069] A hollow drill sleeve 3 is vertically inserted into the upper part of the clamp body 2;

[0070] The drill sleeve 3 is located directly above the flat portion 100 of the supporting shaft blank 1-0;

[0071] The right side of the clamp body 2 is threadedly connected to the first knurled screw 51 distributed laterally;

[0072] The first knurled screw 51 is used to tighten the outer cylindrical end surface 105 of the right side of the flat portion 100 of the supporting shaft blank 1-0 to the left;

[0073] The lower front end of the clamp body 2 is hinged to the lower end of the movable pressing plate 4 (i.e., rotatably connected);

[0074] The upper end of the movable pressing plate 4 is threadedly connected to a longitudinally distributed second knurled screw 52;

[0075] The second knurled screw 52 is used to rotate and move the movable pressing plate 4 (rotated by the hand of the staff) and to press the front end surface 106 of the workpiece on the front side of the flat portion 100 of the supporting shaft blank 1-0 backward;

[0076] It should be noted that the drill sleeve is used to determine the position of the hole to be machined (ie, the shaft hole 102 ) on the workpiece, guide the tool for machining, and improve the rigidity of the tool during machining and prevent vibration during machining.

[0077] In this utility model, see Figures 7a to 7d 、 Figure 8 As shown, the clamp body 2 is an L-shaped structure;

[0078] A workpiece positioning hole 201 is provided at the upper middle portion of the clamp body 2 and extends through the clamp body 2;

[0079] The support shaft blank 1-0 is placed longitudinally in the workpiece positioning hole 201;

[0080] In specific implementation, the upper left corner (i.e., the upper left side) of the workpiece positioning hole 201 is provided with a shaft outer circle positioning surface 202;

[0081] The bottom of the workpiece positioning hole 201 is provided with a flat positioning surface 204;

[0082] An open surface 203 is provided at the lower left side of the workpiece positioning hole 201;

[0083] The upper and lower ends of the open surface 203 are connected to the lower end of the shaft outer circle positioning surface 202 and the left end of the flat positioning surface 204 respectively;

[0084] It should be noted that the open surface 203 extends downward to the flat positioning surface 204 .

[0085] The top of the workpiece positioning hole 201 is provided with a workpiece positioning hole upper end surface 209;

[0086] On the right side of the workpiece positioning hole 201, a positioning hole right end surface 210 (i.e., a vertically distributed plane) is provided;

[0087] Furthermore, the shaft outer circle positioning surface 202 corresponds to and matches the shape and size of the upper end of the shaft outer circle end surface 105 on the support shaft blank 1 - 0 to be processed.

[0088] It should be noted that the shaft outer circle positioning surface 202 is equal in size to the shaft outer circle end surface 105 on the support shaft blank 1 - 0 to be processed.

[0089] Furthermore, the open surface 203 is tangent to the shaft outer circumferential positioning surface 202 .

[0090] Figure 7e This is a schematic diagram of the matching state with the support shaft blank if the open surface of the workpiece positioning hole is not tangent to the outer circle positioning surface of the shaft (a hypothetical situation, contrary to the actual situation of this patent); see Figure 7e As shown, the shaft outer circle positioning surface 202 is used to position the shaft outer circle end face 105 of the workpiece to be processed (i.e., the support shaft blank 1-0). The utility model adopts half of the positioning surface located above the axis of the workpiece to be processed (i.e., the support shaft blank 1-0) and on the upper left side of the workpiece positioning hole 201 as the shaft outer circle positioning surface 202, and an open surface 203 tangent to it (i.e., the shaft outer circle positioning surface 202) is provided below the axis to avoid the workpiece to be processed from being unable to fully contact the flat positioning surface 204 due to the unequal distance from the axis center of the workpiece to be processed to the flat positioning surface 204.

[0091] See also Figure 7e As shown, if the open surface 203 of the workpiece positioning hole 201 is as shown Figure 7e The state shown is: the open surface 203 cannot be tangent to the shaft outer circle positioning surface 202, then the distance from the axis of the workpiece to be processed to the flat positioning surface 204 will be unequal, resulting in a gap, so that the workpiece to be processed 1-0 cannot fully contact the flat positioning surface 204.

[0092] Further, see Figure 7aAs shown, there is a gap of preset width D1 (for example, a gap of 1 mm in width) between the upper end face 209 of the workpiece positioning hole and the flat end face 101 at the top of the support shaft blank 1-0 to be processed, as well as between the right end face 210 of the positioning hole and the outer circular end face 105 on the right side of the support shaft blank 1-0 to be processed, to facilitate loading and unloading of the workpiece to be processed.

[0093] In a specific implementation, a drill sleeve hole 205 is provided at the center of the upper portion of the clamp body 2, which vertically penetrates from top to bottom to the workpiece positioning hole 201; that is, the lower end of the drill sleeve hole 205 is directly connected to the upper end of the workpiece positioning hole 201;

[0094] Inside the drill sleeve hole 205, a drill sleeve 3 is provided;

[0095] It should be noted that the drill sleeve 3 is used to perform hole processing operations on the flat portion 100 of the support shaft blank 1-0 through the drill bit of the bench drill.

[0096] See also Figure 7d As shown, the lower part of the clamp body 2 is provided with vertically distributed chip removal holes 206 just below the drill sleeve hole 205;

[0097] The top of the chip removal hole 206 extends through the flat positioning surface 204 at the bottom of the workpiece positioning hole 201;

[0098] The bottom opening of the chip removal hole 206 is located on the bottom surface of the clamp body 2 .

[0099] It should be noted that the chip removal hole 206 extends downward from the flat positioning surface 204 to the bottom of the device of the present invention;

[0100] Further, the drill sleeve 3 is coaxial with the drill sleeve hole 205;

[0101] The chip removal hole 206 and the drill sleeve hole 205 are located on the same central axis.

[0102] Furthermore, the center position of the workpiece positioning hole 201 has a clamp body center 207;

[0103] When the support shaft blank 1-0 is placed in the workpiece positioning hole 201, the position in the clamp body 2 corresponding to the workpiece axis 107 of the support shaft blank 1-0 is the clamp body center 207, that is, the workpiece axis 107 and the clamp body center 207 of the support shaft blank 1-0 are located on the same longitudinal straight line.

[0104] In specific implementation, the rear end surface of the clamp body 2 is provided with a positioning plate mounting groove 208 at a position corresponding to the workpiece positioning hole 201;

[0105] The shoulder positioning plate 6 is fixedly installed in the positioning plate installation groove 208;

[0106] The shoulder positioning plate 6 is used to tighten the shoulder positioning end surface 104 on the rear side of the flat portion 100 of the supporting shaft blank 1-0 located in the front.

[0107] Furthermore, the shoulder positioning plate 6 is mounted in the positioning plate mounting slot 208 by two screws;

[0108] It should be noted that the shape of the shoulder positioning plate 6 is consistent with the shape of the positioning plate mounting slot 208;

[0109] Furthermore, the front end surface of the shoulder positioning plate 6 is provided with a shoulder positioning surface 601;

[0110] The shoulder positioning surface 601 is used to tightly contact the shoulder positioning end surface 104 on the rear side of the flat portion 100 of the support shaft blank 1-0;

[0111] Furthermore, a screw through hole 602 is provided on each of the left and right sides of the shoulder positioning plate 6;

[0112] A threaded rod through hole 603 is provided in the middle of the shoulder positioning plate 6;

[0113] The diameter of the threaded rod through hole 603 is larger than the outer diameter of the threaded rod 103 at the rear end of the support shaft blank 1-0.

[0114] Furthermore, the diameter of the threaded rod through hole 603 is 1 mm larger than the outer diameter of the threaded rod 103 of the support shaft blank 1 - 0 .

[0115] In this utility model, the specific implementation is as follows Figure 6c As shown, when the shoulder positioning plate 6 is set in the positioning plate installation groove 208 of the clamp body 2, the dimension L1 from the center axis of the drill sleeve hole 205 to the shoulder positioning surface 601 is equal to the distance L between the center axis of the shaft hole 102 and the shaft shoulder positioning end surface 104.

[0116] It should be noted that, for the present invention, after the device of the present invention is assembled, the distance dimension L1 from the center axis of the drill sleeve hole 205 to the shoulder positioning surface 601 is consistent with the distance dimension L from the shaft hole 102 of the finished support shaft 1 to the shaft shoulder 104.

[0117] It should be noted that the thickness of the shoulder positioning plate 6 is equal to the depth (ie, the longitudinal width) of the positioning plate mounting groove 208 .

[0118] In specific implementation, a side knurled screw mounting hole 211 (an internal threaded hole) is provided at the middle of the right end of the clamp body 2, which extends horizontally from right to left to the workpiece positioning hole 201;

[0119] It should be noted that the left side of the side knurled screw mounting hole 211 is directly connected to the right side of the workpiece positioning hole 201 ; that is, the side knurled screw mounting hole 211 passes through the workpiece positioning hole 201 .

[0120] A first knurled screw 51 is threadedly connected to the side knurled screw mounting hole 211;

[0121] The first knurled screw 51 is used to tighten the outer circular end surface 105 of the shaft on the right side of the flat portion 100 of the support shaft blank 1-0 placed in the workpiece positioning hole 201 to the left.

[0122] Furthermore, the central axis of the side knurled screw mounting hole 211 is higher than the center 207 of the clamp body in the workpiece positioning hole 201 and lower than the workpiece positioning hole upper end surface 209 of the workpiece positioning hole 201 .

[0123] It should be noted that, in the middle of the right end of the clamp body 2, at a position higher than the center 207 of the clamp body by a distance H1 (specifically 1 mm above), a side knurled screw mounting hole 211 is provided which penetrates to the workpiece positioning hole 201.

[0124] It should be noted that, see Figure 7f The schematic diagram of the direction of the clamping force applied by the first knurled screw located on the side of the clamp body to the workpiece to be processed (i.e., the support shaft blank 1-0) is shown. The clamping force of the side knurled screw (i.e., the first knurled screw 51) acts on the arc surface above the axis of the workpiece to be processed (i.e., the support shaft blank 1-0) (i.e., the position above the outer circular end face 105 of the shaft on the right side). The clamping force on the workpiece to be processed is decomposed into: horizontal clamping force and vertical clamping force. The vertical clamping force can cause the workpiece to be processed to be in close contact with the flat positioning surface 204 of the clamp body 2, thereby effectively preventing the workpiece to be processed from flipping.

[0125] In a specific implementation, the lower part of the clamp body 2 is provided with a boss 212 protruding forward;

[0126] A movable pressure plate mounting groove 213 is provided in the middle of the boss 212 and extends vertically upward and downward.

[0127] A pin hole 214 is provided at the center of the front end surface of the boss 212 and extends longitudinally through the rear end surface of the clamp body 2;

[0128] A pin 7 is provided in the pin hole 214;

[0129] Furthermore, the pin hole 214 and the pin 7 are interference fit;

[0130] In specific implementation, the front end surface of the clamp body 2 is provided with a pressing plate rotation arc groove 215;

[0131] Further, see Figure 7aAs shown, the left side of the rotating arc groove 215 of the pressing plate is connected to the right end surface 210 of the positioning hole 201 of the workpiece;

[0132] The shape of the pressing plate rotating arc groove 215 is an arc, and the arc has the axis of the pin hole 214 as the center and the distance R2 from the pin hole 214 to the center of the clamp body 207 as the radius.

[0133] It should be noted that the front end face of the clamp body 2, at the junction with the right end face 210 of the positioning hole of the workpiece positioning hole 201, is provided with a pressure plate rotating arc groove 215 with the axis of the pin hole 214 as the center of the circle and the distance R2 from the pin hole 214 to the center of the clamp body 207 as the radius.

[0134] Furthermore, the right end of the pressing plate rotating arc groove 215 has a groove end arc surface 217 .

[0135] Specifically, the lower end of the movable pressing plate 4 is hinged to the boss 212 through the pin 7 in the pin hole 214 (ie, it is rotatably connected);

[0136] A second knurled screw 52 is mounted on the upper end of the movable pressing plate 4;

[0137] The lower end of the movable pressing plate 4 is located in the movable pressing plate mounting groove 213 of the clamp body 2;

[0138] The pressing post 503 at the rear end of the second knurled screw 52 is located in the rotating arc groove 215 of the pressing plate;

[0139] The pressing column 503 of the second knurled screw 52 is used to press the front end surface 106 of the workpiece on the front side of the flat portion 100 of the supporting shaft blank 1-0;

[0140] Furthermore, the width of the pressing plate rotating arc groove 215 is larger than the diameter of the pressing column 503 at the rear end of the second knurled screw 52 (for example, slightly larger by 1 mm);

[0141] Further, as shown in FIG5 , the groove bottom 216 on the rear side of the pressing plate rotating arc groove 215 is flush with the front end surface 106 of the support shaft blank 1 - 0 placed in the workpiece positioning hole 201 (ie, located on the same vertical plane);

[0142] It should be noted that the angle at which the movable pressing plate 5 rotates on the pressing plate rotating arc groove 215 is preferably such that when the movable pressing plate 5 rotates to the arc surface 217 at the groove end, it is convenient to load and unload the completed support shaft 1;

[0143] For specific implementation, see Figure 11a 、 Figure 11b As shown, the lower part of the movable pressing plate 4 is provided with a pressing plate pin hole 401;

[0144] The pin 7 passes longitudinally through the pin hole 214 on the clamp body 2 and the pressure plate pin hole 401 on the movable pressure plate 4;

[0145] Furthermore, the pressure plate pin hole 401 and the pin 7 are rotatably clearance-fitted;

[0146] In specific implementation, the lower end of the movable pressing plate 4 is provided with a pressing plate arc surface 402 which is concentric with the pressing plate pin hole 401;

[0147] The upper part of the movable pressing plate 4 is provided with a pressing plate knurled screw mounting hole 403 (an internal threaded hole) running longitudinally through the upper part of the movable pressing plate 4;

[0148] The knurled screw mounting hole 403 of the pressure plate is threadedly connected to the locking thread 502 in the middle of the second knurled screw 52;

[0149] Further, see Figure 11a As shown, the distance between the axis of the pressing plate knurled screw mounting hole 403 and the axis of the pressing plate pin hole 401 is R2;

[0150] R2 is equal to the distance R1 from the pin hole 214 in the clamp body 2 to the center 207 of the clamp body.

[0151] It should be noted that a knurled screw mounting hole 403 for the pressing plate is provided on the upper portion of the movable pressing plate 4 at a distance R2 from the pressing plate pin hole 401. R2 here is equal to the distance R1 from the pin hole 214 in the clamp body 2 to the center 207 of the clamp body.

[0152] It should be noted that the movable pressing plate 4 is rotatably connected to the movable pressing plate mounting groove 213 of the clamp body 2 by the pin 7. The length of the pin 7 driven into the pin hole 214 is required not to pass through the chip removal hole 206;

[0153] In this utility model, the specific implementation is as follows Figure 12a 、 Figure 12b As shown, the first knurled screw 51 and the second knurled screw 52 have the same shape and size;

[0154] In the present invention, in a specific implementation, the right end portion of the first knurled screw 51 is provided with a knurled large end 501;

[0155] A locking thread 502 is provided in the middle of the first knurled screw 51;

[0156] A pressing post 503 is provided at the left end portion of the first knurled screw 51;

[0157] In the present invention, in a specific implementation, the front end portion of the second knurled screw 52 is provided with a knurled large end 501;

[0158] A locking thread 502 is provided in the middle portion of the second knurled screw 52;

[0159] A compression post 503 is provided at the rear end of the second knurled screw 52;

[0160] In order to more clearly understand the technical solution of the present invention, the working process of the present invention is described below.

[0161] First, the staff places the device of the present invention on the workbench, holds the second knurled screw 52 on the upper end of the movable pressing plate 4 and rotates it clockwise to drive the movable pressing plate 4 to rotate to the groove end arc surface 217 at the right end of the pressing plate rotating arc groove 215;

[0162] Then, the support shaft blank 1-0 to be processed is inserted from one end of the threaded rod 103 into the workpiece positioning hole 201 of the clamp body 2 from front to back, and the shoulder positioning end surface 104 on the rear side of the flat part 100 of the support shaft blank 1-0 is abutted against the shoulder positioning surface 601 on the front side of the shoulder positioning plate 6 for positioning, and the flat end surface 101 on the lower side of the flat part 100 of the support shaft blank 1-0 is tightly positioned with the flat positioning surface 204 at the bottom of the workpiece positioning hole 201;

[0163] Then, insert the drill sleeve 3 into the drill sleeve hole 205 of the clamp body 2, and the bottom of the drill sleeve 3 is

[0164] Then, tighten the first knurled screw 51 on the right side of the clamp body 2. The first knurled screw 51 presses the outer cylindrical end surface 105 on the right side of the flat portion 100 of the support shaft blank 1-0 to the left, so that the outer cylindrical end surface 105 on the left side of the support shaft blank 1-0 is abutted against the outer cylindrical positioning surface 202 at the upper left corner of the workpiece positioning hole 201.

[0165] Then, the staff member holds the second knurled screw 52 on the upper end of the movable pressing plate 4 and rotates it counterclockwise to drive the movable pressing plate 4 to rotate to the front position of the workpiece positioning hole 201. Specifically, it is preferred to: drive the movable pressing plate 4 to rotate to the position just in front of the center 207 of the clamping body at the center of the workpiece positioning hole 201 (that is, the central axis of the second knurled screw 52 and the center 207 of the clamping body at the center of the workpiece positioning hole 201 are located on the same longitudinal straight line. At this time, the rear side surface of the clamping column 503 of the second knurled screw 52 faces the front end surface 106 of the workpiece at the front side of the flat portion 100 of the supporting shaft blank 1-0, and the central axis of the second knurled screw 52 intersects the central axis of the drill sleeve 3 at right angles).

[0166] It should be noted that, in specific operations, when the staff holds the second knurled screw 52 on the upper end of the movable pressure plate 4 and rotates it, they can visually observe that the movable pressure plate 4 is turned to a vertical position, so as to visually align the movable pressure plate 4 with the workpiece positioning hole 201 front and back, and the movable pressure plate 4 is rotated to a position directly in front of the workpiece positioning hole 201.

[0167] Then, tighten the second knurled screw 52 at the upper end of the movable pressure plate 4, and the clamping column 503 of the second knurled screw 52 presses the front end face 106 of the workpiece on the front side of the flat portion 100 of the support shaft blank 1-0. At this time, the positioning and clamping operation of the workpiece (i.e., the support shaft blank 1-0) in the device is completed.

[0168] Finally, the bench drill is started, and the drill bit of the bench drill passes through the hollow drill sleeve 3 to perform hole machining on the flat shaft portion 100 of the support shaft blank 1-0 directly below, thereby obtaining the shaft hole 102, thereby finally obtaining the finished support shaft 1 with the shaft hole 102 machined.

[0169] It should be noted that the apparatus of the present invention is moved with the workpiece to be processed, so that the drill bit on the bench drill is aligned vertically with the drill sleeve hole 205, the bench drill is started, and the operating handle is controlled to cause the drill bit to cut downward along the drill sleeve 3 to cut through the workpiece, thereby obtaining the axial hole 102. The drill sleeve 3 serves to position and guide the drill bit during the cutting process.

[0170] After the processing is completed, the finished support shaft 1 can be removed by loosening the two knurled screws and rotating the movable pressing plate 4 to the groove end arc surface 217 at the right end of the pressing plate rotating arc groove 215.

[0171] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A device for machining and positioning a flat shaft hole of a support shaft, characterized in that: It comprises a clamping body (2), a drill sleeve (3), a movable pressing plate (4), a first knurled screw (51) and a second knurled screw (52); A support shaft blank (1-0) to be processed is longitudinally provided on the inner side of the clamp body (2); A hollow drill sleeve (3) is vertically inserted into the upper portion of the clamp body (2); A drill sleeve (3) is located directly above the flat portion (100) of the supporting shaft blank (1-0); The right side of the clamp body (2) is threadedly connected to a first knurled screw (51) distributed laterally; A first knurled screw (51) is used for tightening the outer cylindrical end surface (105) of the right side of the flat portion (100) of the supporting shaft blank (1-0) to the left; The lower front end of the clamp body (2) is hinged to the lower end of the movable pressing plate (4); The upper end of the movable pressing plate (4) is threadedly connected to a second knurled screw (52) distributed longitudinally; The second knurled screw (52) is used for rotating and moving the movable pressing plate (4) and for pressing the front end surface (106) of the workpiece on the front side of the flat portion (100) of the supporting shaft blank (1-0) backward.

2. The device for machining and positioning a flat shaft hole of a support shaft according to claim 1, characterized in that: A workpiece positioning hole (201) is provided at the upper middle portion of the clamp body (2) and extends through the front and back of the clamp body; The support shaft blank (1-0) is placed longitudinally in the workpiece positioning hole (201).

3. The device for machining and positioning a flat shaft hole of a support shaft according to claim 2, characterized in that: The upper left corner of the workpiece positioning hole (201) is provided with a shaft outer circle positioning surface (202); The bottom of the workpiece positioning hole (201) is provided with a flat positioning surface (204); An open surface (203) is provided at the lower left side of the workpiece positioning hole (201); The upper and lower ends of the open surface (203) are respectively connected to the lower end of the shaft outer circle positioning surface (202) and the left end of the flat positioning surface (204); The top of the workpiece positioning hole (201) is provided with a workpiece positioning hole upper end surface (209); A positioning hole right end surface (210) is provided on the right side of the workpiece positioning hole (201).

4. The device for machining and positioning a flat shaft hole of a support shaft according to claim 3, characterized in that: The shaft outer circle positioning surface (202) corresponds in shape and size to the upper end of the shaft outer circle end surface (105) on the supporting shaft blank (1-0) to be processed.

5. The device for machining and positioning a flat shaft hole of a support shaft according to claim 2, characterized in that: A drill sleeve hole (205) is provided at the center of the upper portion of the clamp body (2) and vertically penetrates from top to bottom to the workpiece positioning hole (201); A drill sleeve (3) is provided in the drill sleeve hole (205); The lower part of the clamp body (2) is provided with vertically distributed chip removal holes (206) at a position directly below the drill sleeve hole (205); The top of the chip removal hole (206) penetrates to the flat positioning surface (204) at the bottom of the workpiece positioning hole (201); The bottom opening of the chip removal hole (206) is located on the bottom surface of the clamp body (2).

6. The device for machining and positioning a flat shaft hole of a support shaft according to claim 2, characterized in that: The rear end surface of the clamp body (2) is provided with a positioning plate mounting groove (208) at a position exactly corresponding to the workpiece positioning hole (201); A shoulder positioning plate (6) is fixedly installed in the positioning plate installation groove (208); The shoulder positioning plate (6) is used for tightening the shoulder positioning end surface (104) on the rear side of the shaft flat portion (100) of the supporting shaft blank (1-0) located in the front.

7. The device for machining and positioning a flat shaft hole of a support shaft according to claim 6, characterized in that: The center position of the workpiece positioning hole (201) has a clamp body center (207); When the support shaft blank (1-0) is placed in the workpiece positioning hole (201), the workpiece axis (107) and the center (207) of the clamp body of the support shaft blank (1-0) are located on the same longitudinal straight line; and / or, The front end surface of the shoulder positioning plate (6) is provided with a shoulder positioning surface (601); The shoulder positioning surface (601) is used for tightly contacting the shoulder positioning end surface (104) on the rear side of the flat shaft portion (100) of the supporting shaft blank (1-0); and / or, A screw through hole (602) is provided on each of the left and right sides of the shoulder positioning plate (6); and / or, A threaded rod through hole (603) is provided in the middle of the shoulder positioning plate (6); The diameter of the threaded rod through hole (603) is larger than the outer diameter of the threaded rod (103) at the rear end of the support shaft blank (1-0); and / or, When the shoulder positioning plate (6) is arranged in the positioning plate mounting groove (208) of the clamp body (2), the dimension L1 from the center axis of the drill sleeve hole (205) to the shoulder positioning surface (601) is equal to the distance L between the center axis of the shaft hole (102) and the shaft shoulder positioning end surface (104).

8. The device for machining and positioning a flat shaft hole of a support shaft according to claim 2, wherein: A side knurled screw mounting hole (211) is provided at the middle portion of the right end of the clamp body (2) and extends horizontally from right to left to the workpiece positioning hole (201); A first knurled screw (51) is threadedly connected in the side knurled screw mounting hole (211); A first knurled screw (51) is used for tightening the outer circular end surface (105) on the right side of the flat portion (100) of the support shaft blank (1-0) placed in the workpiece positioning hole (201) to the left; The central axis of the side knurled screw mounting hole (211) is higher than the center of the clamp body (207) in the workpiece positioning hole (201) and lower than the workpiece positioning hole upper end surface (209) of the workpiece positioning hole (201).

9. The device for machining and positioning a flat shaft hole of a support shaft according to claim 2, wherein: The front end surface of the clamp body (2) is provided with a pressing plate rotating arc groove (215); The left side of the pressing plate rotating arc groove (215) is connected to the right end surface (210) of the positioning hole of the workpiece positioning hole (201); The shape of the pressing plate rotating arc groove (215) is an arc, and the arc has the axis of the pin hole (214) as the center and the distance R (2) from the pin hole (214) to the center of the clamp body (207) as the radius; The lower part of the clamp body (2) is provided with a boss (212) protruding toward the front; A movable pressing plate mounting groove (213) is provided in the middle of the boss (212) and extends vertically upward and downward. A pin hole (214) is provided at the center of the front end surface of the boss (212) and extends longitudinally through the rear end surface of the clamp body (2); The lower end of the movable pressing plate (4) is hinged to the boss (212) via a pin (7) in a pin hole (214); A second knurled screw (52) is mounted on the upper end of the movable pressing plate (4); The lower end of the movable pressing plate (4) is located in the movable pressing plate installation groove (213) of the clamp body (2); The pressing column (503) at the rear end of the second knurled screw (52) is located in the rotating arc groove (215) of the pressing plate; The pressing column (503) of the second knurled screw (52) is used to press the front end surface (106) of the workpiece on the front side of the flat part (100) of the supporting shaft blank (1-0); A pressing plate pin hole (401) is provided at the lower portion of the movable pressing plate (4); The pin (7) passes longitudinally through the pin hole (214) on the clamp body (2) and the pressure plate pin hole (401) on the movable pressure plate (4); The lower end of the movable pressing plate (4) is provided with a pressing plate arc surface (402) which is concentric with the pressing plate pin hole (401); The upper portion of the movable pressing plate (4) is provided with a pressing plate knurled screw mounting hole (403) running longitudinally therethrough; The pressure plate knurled screw mounting hole (403) is threadedly connected to the locking thread (502) in the middle of the second knurled screw (52).

10. The device for machining and positioning a flat shaft hole of a support shaft according to claim 2, wherein: The width of the rotating arc groove (215) of the pressing plate is larger than the diameter of the pressing column (503) at the rear end of the second knurled screw (52); and / or, The groove bottom (216) at the rear side of the pressing plate rotating arc groove (215) is flush with the front end surface (106) of the support shaft blank (1-0) placed in the workpiece positioning hole (201); and / or, The distance between the axis of the pressing plate knurled screw mounting hole (403) and the axis of the pressing plate pin hole (401) is R2; R2 is equal to the distance R1 from the pin hole (214) in the clamp body (2) to the center (207) of the clamp body.

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