Positioning fixture for drilling a connecting seat

Abstract

This invention discloses a positioning fixture for drilling connecting seats, applicable to the field of fixture technology. The invention involves sliding the shaft-hole workpiece on a push plate, moving it to the bottom of the positioning cover. The drill bit passes through the positioning sleeve to precisely drill the shaft-hole workpiece at the desired drilling position. Positioning blocks and positioning baffles clamp the shaft-hole workpiece, and the positioning pin is inserted into the central shaft hole of the workpiece, effectively improving the clamping stability and facilitating quick release from fixation. This facilitates continuous drilling and improves drilling efficiency. Furthermore, by using the positioning blocks and positioning baffles to fix the shaft-hole workpiece, and controlling the extension length of the angle push rod to adjust the flip angles of the upper and lower angle blocks, the shaft-hole workpiece rotates around the positioning pin, allowing for specified angle adjustments and further improving drilling accuracy.

Description

Technical Field

[0001] This invention relates to the field of clamping technology, and in particular to a positioning clamp for drilling connecting seats. Background Technology

[0002] In the field of machining, many parts require drilling. Due to their inherent function, these parts often have a specific central bore. The purpose of drilling is to create a side hole that connects to the central bore from the side of the part. Examples include bearing caps, air guide clamps, and irregularly shaped nuts. These parts vary in shape and are produced in relatively small batches. Manually fixing these parts with positioning fixtures is labor-intensive, impacting drilling efficiency. For instance, Chinese patent CN117884683A discloses a quick-clamping drilling and positioning fixture for bearing caps, but this currently doesn't address the drilling efficiency of these parts. Machining often requires the use of large CNC machine tools. The positioning fixture is fixed on the connecting seat of the CNC machine tool, and the drilling of parts is realized through the digital control of the CNC machine tool. However, most traditional drilling positioning fixtures use bolts to fix and lock the parts. For example, a suspended multi-angle rotary positioning drilling fixture disclosed in Chinese patent CN105690126B fixes and clamps the parts by locking nuts and positioning locking cores. The fixing and clamping process of traditional positioning fixtures cannot be adapted to the automatic production line mode of CNC machine tools, which affects the drilling efficiency of parts. Summary of the Invention

[0003] The core of this invention lies in solving the problem that traditional positioning fixtures in the prior art cannot adapt to the automatic production line mode of CNC machine tools by quickly clamping and fixing the workpiece with the fixed shaft hole through positioning clamping block and positioning baffle.

[0004] To solve the above problems, the present invention adopts the following technical solution.

[0005] A positioning fixture for drilling a connecting seat includes a base, a push plate fixedly connected to the top of the base, a shaft hole workpiece placed on the top of the push plate, a support base fixedly connected to one end of the top of the base, a positioning cover fixedly connected to the top of the support base, and a positioning sleeve movably connected to the middle of the positioning cover. A telescopic push rod is fixedly connected to the back of the support base. A positioning clamping block is fixedly connected to the telescopic end of the telescopic push rod. A positioning pin is fixedly connected to the middle of the positioning clamping block. The positioning pin is inserted into the central shaft hole of the shaft hole workpiece. A positioning baffle is slidably connected to the end of the push plate away from the support base. The positioning clamping block and the positioning baffle respectively clamp the two ends of the central shaft hole of the shaft hole workpiece. An upper angle clamping block is rotatably connected to the bottom of one end of the positioning cover. A movable opening is provided in the middle of the push plate. A lower angle clamping block is rotatably connected inside the movable opening. The upper angle clamping block and the lower angle clamping block together clamp the outer end of the shaft hole workpiece. An angle push rod is hinged between the back of the upper angle clamping block and the positioning cover and between the back of the lower angle clamping block and the base.

[0006] Furthermore, a fixed end block is fixedly connected to the top of the end of the positioning cover near the support base, and a sleeve stud is rotatably connected to the middle of the fixed end block, with the sleeve stud rotatably connected to the positioning sleeve.

[0007] Furthermore, a fixed base is fixedly connected to the end of the push plate away from the support base, and a baffle stud is fixedly connected to the middle of the fixed base, with the baffle stud rotatably connected to the middle of the positioning baffle.

[0008] Furthermore, when the angle push rod retracts and causes the upper angle clamping block to flip upward, the lower surface of the upper angle clamping block is flush with the lower surface of the positioning cover.

[0009] Furthermore, when the angle push rod retracts and causes the lower angle clamping block to flip downwards, the upper surface of the lower angle clamping block is flush with the upper surface of the push plate.

[0010] Optionally, a cleaning brush is fixedly connected to the rotating connection end of the upper angle clamping block and the positioning cover, and the cleaning brush slides in contact with the upper surface of the shaft hole workpiece.

[0011] Furthermore, a chip removal groove is provided at the rotating connection end between the movable port and the lower angle clamping block. The chip removal groove is vertically aligned with the cleaning brush, and multiple internal grooves are evenly provided at the end of the chip removal groove away from the lower angle clamping block.

[0012] Furthermore, the lower angle clamping block and the rotating connection end of the movable opening are fixedly connected with a connecting tooth. The top of the connecting tooth is flush with the upper surface of the lower angle clamping block, and the connecting tooth is inserted into the inner groove.

[0013] Compared with the prior art, the advantages of this invention are: This invention involves sliding the shaft-hole workpiece on a push plate, moving it to the bottom of the positioning cover. A drill bit passes through the positioning sleeve to precisely drill the workpiece at the desired drilling position. Positioning clamps and baffles hold the workpiece, and the positioning pin is inserted into the central hole of the workpiece, effectively improving the clamping stability and facilitating quick release from fixation. This allows for continuous drilling and significantly increases drilling efficiency. Furthermore, by using the positioning clamps and baffles to hold and fix the workpiece, and controlling the extension length of the angle push rod to adjust the flip angles of the upper and lower angle clamps, the workpiece rotates around the positioning pin, allowing for specified angle adjustments and further improving drilling accuracy.

[0014] (2) The present invention uses the cleaning brush on the upper angle clamping block to clean the upper surface of the shaft hole workpiece. The cleaning brush cleans the fallen debris and it falls into the chip groove, which effectively improves the cleanliness of the push plate. When the shaft hole workpiece moves on the push plate, it pushes the debris left on the push plate into the chip groove, which further improves the debris cleaning effect. The inner groove increases the space of the chip groove, which makes it easier for debris to pass through the chip groove. When the lower angle clamping block flips down to restore itself, the connecting teeth on the lower angle clamping block flip up and insert into the inner groove. The connecting teeth fill the gap in the chip groove, so that the shaft hole workpiece can pass smoothly through the top of the chip groove, which effectively improves the movement ability of the shaft hole workpiece on the push plate. Attached Figure Description

[0015] Figure 1 This is a top-view perspective view of the present invention. Figure 2 This is a bottom-view perspective structural diagram of the present invention; Figure 3 This is a cross-sectional perspective view of the positioning clamp and positioning baffle of the present invention. Figure 4 This is a three-dimensional structural diagram of the upper and lower angle clamping blocks of the present invention clamping the shaft hole workpiece; Figure 5 This is a demonstration diagram showing how the upper and lower angle clamping blocks of the present invention adjust the angle of the shaft hole workpiece. Figure 6 This is a three-dimensional structural diagram of the upper angle clamping block and the lower angle clamping block of the present invention; Figure 7 This is a bottom-view perspective view of the angle clamping block of the present invention; Figure 8 This is a top perspective view of the chip removal groove and inner groove of the present invention; Figure 9 This is a demonstration diagram of the tilting motion of the angled clamping block in this invention; Figure 10 This is a three-dimensional structural diagram of the angle clamping block of the present invention.

[0016] Explanation of the labels in the diagram: 1. Base, 101. Push plate, 102. Shaft hole workpiece, 103. Support seat, 104. Positioning cover, 105. Positioning sleeve, 106. Fixed end block, 107. Sleeve stud, 2. Telescopic push rod, 201. Positioning clamp, 202. Positioning pin head, 203. Positioning baffle, 204. Upper angle clamp, 205. Movable opening, 206. Lower angle clamp, 207. Angle push rod, 208. Fixed seat, 209. Baffle stud, 3. Cleaning brush, 301. Chip removal groove, 302. Inner groove, 303. Engaging tooth. Detailed Implementation

[0017] The technical solutions will now be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention.

[0018] First implementation method: Please see Figures 1 to 3 A positioning fixture for drilling a connecting seat includes a base 1, a push plate 101 fixedly connected to the top of the base 1, a shaft hole workpiece 102 placed on the top of the push plate 101, a support base 103 fixedly connected to one end of the top of the base 1, a positioning cover 104 fixedly connected to the top of the support base 103, and a positioning sleeve 105 movably connected to the middle of the positioning cover 104. The shaft hole workpiece 102 slides on the push plate 101, moving the shaft hole workpiece 102 to the bottom of the positioning cover 104, through which a drill bit for drilling passes. The positioning sleeve 105 is used to make the drill bit accurately aligned with the drilling position of the shaft hole workpiece 102. The top of the positioning cover 104 near the support base 103 is fixedly connected to the top of the fixed end block 106. The middle of the fixed end block 106 is rotatably connected to the sleeve stud 107. The sleeve stud 107 is rotatably connected to the positioning sleeve 105. By rotating and adjusting the sleeve stud 107, the distance between the fixed end block 106 and the positioning sleeve 105 can be adjusted, so that the positioning sleeve 105 can be pre-aligned with the drilling position of the shaft hole workpiece 102. When drilling the shaft hole workpiece 102, the shaft hole workpiece 102 is placed on the push plate 101 and pushed to slide on the push plate 101, so that the shaft hole workpiece 102 moves to the bottom of the positioning cover 104. The sleeve stud 107 is rotated to adjust the distance between the fixed end block 106 and the positioning sleeve 105, so that the positioning sleeve 105 is aligned with the drilling position of the shaft hole workpiece 102 in advance. Then, the drill bit passes through the positioning sleeve 105 to drill the shaft hole workpiece 102.

[0019] Please see Figure 3A telescopic push rod 2 is fixedly connected to the back of the support base 103. A positioning clamping block 201 is fixedly connected to the telescopic end of the telescopic push rod 2. A positioning pin 202 is fixedly connected to the middle of the positioning clamping block 201. The positioning pin 202 is inserted into the central shaft hole of the shaft hole workpiece 102. A positioning baffle 203 is slidably connected to the end of the push plate 101 away from the support base 103. The positioning clamping block 201 and the positioning baffle 203 respectively clamp the two ends of the central shaft hole of the shaft hole workpiece 102. After the shaft hole workpiece 102 moves to the bottom of the positioning cover 104, the telescopic push rod 2 pushes the positioning clamping block 201, and the positioning clamping block 201 and the positioning baffle 203 are used to... 03 The shaft hole workpiece 102 is clamped, and the positioning pin 202 is inserted into the central shaft hole of the shaft hole workpiece 102, which effectively improves the clamping stability of the shaft hole workpiece 102. The end of the push plate 101 away from the support base 103 is fixedly connected to the fixed base 208. The middle part of the fixed base 208 is fixedly connected to the baffle stud 209. The baffle stud 209 is rotatably connected to the middle part of the positioning baffle 203. Rotating the baffle stud 209 pushes the positioning baffle 203 closer to the support base 103, thereby adjusting the initial distance between the positioning baffle 203 and the positioning clamping block 201 to adapt to the clamping operation of shaft hole workpieces 102 of different lengths. After the shaft hole workpiece 102 moves to the bottom of the positioning cover 104, the telescopic push rod 2 pushes the positioning clamping block 201. The positioning clamping block 201 and the positioning baffle 203 clamp the shaft hole workpiece 102, and the positioning pin 202 is inserted into the central shaft hole of the shaft hole workpiece 102, which effectively improves the clamping stability of the shaft hole workpiece 102. After the shaft hole workpiece 102 is drilled, the telescopic push rod 2 retracts and drives the positioning clamping block 201 to return to its original position, quickly releasing the clamping and fixing of the shaft hole workpiece 102, and continuing to push the shaft hole workpiece 102 to slide on the push plate 101, quickly performing drilling and positioning of a new shaft hole workpiece 102, effectively improving the drilling efficiency of the shaft hole workpiece 102.

[0020] Please see Figures 3 to 5An upper angle clamping block 204 is rotatably connected to the bottom of one end of the positioning cover 104. A movable opening 205 is provided in the middle of the push plate 101. A lower angle clamping block 206 is rotatably connected inside the movable opening 205. The upper angle clamping block 204 and the lower angle clamping block 206 together clamp the outer end of the shaft hole workpiece 102. Angle push rods 207 are hinged between the back of the upper angle clamping block 204 and the positioning cover 104, and between the back of the lower angle clamping block 206 and the base 1. When the positioning clamping block 201 and the positioning baffle 203 clamp and fix the shaft hole workpiece 102, the angle push rods 207 push the upper angle clamping block 204 and the lower angle clamping block 206 to clamp the outer end of the shaft hole workpiece 102. By controlling the extension length of the angle push rods 207, the flip angles of the upper angle clamping block 204 and the lower angle clamping block 206 are adjusted respectively. The angle adjustment allows the shaft hole workpiece 102 to rotate around the positioning pin head 202 as the axis, thereby improving the drilling accuracy of the shaft hole workpiece 102. When the angle push rod 207 retracts and drives the upper angle clamping block 204 to flip upward, the lower surface of the upper angle clamping block 204 is flush with the lower surface of the positioning cover 104. When the angle push rod 207 retracts and drives the lower angle clamping block 206 to flip downward, the upper surface of the lower angle clamping block 206 is flush with the upper surface of the push plate 101. After the angle push rod 207 retracts and drives the upper angle clamping block 204 to flip upward, and the angle push rod 207 retracts and drives the lower angle clamping block 206 to flip downward, the moving space of the shaft hole workpiece 102 above the push plate 101 is restored, making it easier for the shaft hole workpiece 102 to be pushed away from the area below the positioning cover 104. When the shaft hole workpiece 102 moves to the bottom of the positioning cover 104, the angle push rod 207 pushes the upper angle clamping block 204 to flip downward and the lower angle clamping block 206 to flip upward. The upper angle clamping block 204 and the lower angle clamping block 206 pre-block the sliding of the shaft hole workpiece 102, so that the positioning clamping block 201 and the positioning baffle 203 can clamp and fix the shaft hole workpiece 102. Then, after the shaft hole workpiece 102 is fixedly clamped, the angle push rod 207 pushes the upper angle clamping block 204 and the lower angle clamping block 206 to clamp the outer end of the shaft hole workpiece 102. By controlling the extension length of the angle push rod 207, the flipping angle of the upper angle clamping block 204 and the lower angle clamping block 206 are adjusted respectively, so that the shaft hole workpiece 102 can rotate around the positioning pin head 202 as the axis, and the shaft hole workpiece 102 can be adjusted at a specified angle, further improving the drilling accuracy of the shaft hole workpiece 102.

[0021] Second implementation method: Compared to the first embodiment, the main additions are a cleaning brush 3 and a chip removal groove 301. The specific additions are as follows, while the remaining structures are the same as in the first embodiment.

[0022] Please see Figures 6 to 10A cleaning brush 3 is fixedly connected to the rotating connection end of the upper angle clamping block 204 and the positioning cover 104. The cleaning brush 3 slides in contact with the upper surface of the shaft hole workpiece 102. After drilling of the shaft hole workpiece 102 is completed, the shaft hole workpiece 102 is pushed to slide on the push plate 101. The cleaning brush 3 on the upper angle clamping block 204 cleans the upper surface of the shaft hole workpiece 102. A chip removal groove 301 is provided at the rotating connection end of the movable port 205 and the lower angle clamping block 206. The chip removal groove 301 is vertically corresponding to the cleaning brush 3. The chips cleaned by the cleaning brush 3 fall downward into the chip removal groove 301. The chips on the push plate 101 are pushed into the chip removal groove 301 by the next pushed shaft hole workpiece 102. At this time, the lower angle clamping block 206 is in an upward flipping position. The chips pushed by the shaft hole workpiece 102 are guided into the chip removal groove 301 by the inclined surface formed by the lower angle clamping block 206. 1. Multiple inner grooves 302 are evenly provided at one end away from the lower angle clamping block 206. The inner grooves 302 increase the space size of the chip removal groove 301 and effectively reduce the influence of the chip removal groove 301 on the sliding of the shaft hole workpiece 102 on the push plate 101. The lower angle clamping block 206 and the rotating connection end of the movable port 205 are fixedly connected with a connecting tooth 303. The top of the connecting tooth 303 is flush with the upper surface of the lower angle clamping block 206, and the connecting tooth 303 is inserted into the inner groove 302. When the angle push rod 207 retracts and drives the lower angle clamping block 206 to flip down and return to its original position, the connecting tooth 303 on the lower angle clamping block 206 is inserted into the inner groove 302 to build the connection structure at the left and right ends of the chip removal groove 301, so that the shaft hole workpiece 102 can pass smoothly over the chip removal groove 301, effectively improving the movement ability of the shaft hole workpiece 102 on the push plate 101. After drilling is completed on the shaft hole workpiece 102, the shaft hole workpiece 102 is pushed to slide on the push plate 101. The cleaning brush 3 on the upper angle clamping block 204 cleans the upper surface of the shaft hole workpiece 102. The cleaning brush 3 cleans the fallen debris and it falls downward into the chip groove 301, effectively improving the cleanliness of the push plate 101. When the next shaft hole workpiece 102 to be drilled is pushed to the bottom of the positioning cover 104, the shaft hole workpiece 102 pushes the debris left on the push plate 101 into the chip removal groove 301. At this time, the lower angle clamping block 206 is in an upward flipped state. The inclined surface formed by the lower angle clamping block 206 guides the debris into the chip removal groove 301, further improving the cleaning effect of the debris. The inner groove 302 increases the space size of the chip removal groove 301, making it easier for the debris to pass through the chip removal groove 301. When the angle push rod 207 retracts and drives the lower angle clamping block 206 to flip downwards and return to its original position, the engaging tooth 303 at the rotating connection end of the lower angle clamping block 206 flips in the opposite direction, so that the engaging tooth 303 and the inner groove 302 are inserted and engaged. The engaging tooth 303 is used to build the connection structure at the left and right ends of the chip removal groove 301, fill the gap in the chip removal groove 301, and enable the shaft hole workpiece 102 to pass smoothly above the chip removal groove 301, effectively improving the movement ability of the shaft hole workpiece 102 on the push plate 101.

[0023] The above description is merely a preferred embodiment of the present invention; it encompasses all the protection scope of the present invention. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in the present invention, based on the technical solutions and improved concepts of the present invention, should be covered within the protection scope of the present invention.

Claims

1. A positioning fixture for drilling a connecting seat, comprising a base (1), characterized in that: A push plate (101) is fixedly connected to the top of the base (1), and a shaft hole workpiece (102) is placed on the top of the push plate (101). A support base (103) is fixedly connected to one end of the top of the base (1), and a positioning cover (104) is fixedly connected to the top of the support base (103). A positioning sleeve (105) is movably connected to the middle of the positioning cover (104). A telescopic push rod (2) is fixedly connected to the back of the support base (103). A positioning clamp (201) is fixedly connected to the telescopic end of the telescopic push rod (2). A positioning pin (202) is fixedly connected to the middle of the positioning clamp (201). The positioning pin (202) is inserted into the central shaft hole of the shaft hole workpiece (102). A positioning baffle (203) is slidably connected to one end of the push plate (101) away from the support base (103). The positioning clamp (201) and the positioning baffle (203) respectively clamp the two ends of the central shaft hole of the shaft hole workpiece (102). An upper angle clamping block (204) is rotatably connected to the bottom of one end of the positioning cover (104). A movable opening (205) is provided in the middle of the push plate (101). A lower angle clamping block (206) is rotatably connected inside the movable opening (205). The upper angle clamping block (204) and the lower angle clamping block (206) together clamp the outer end of the shaft hole workpiece (102). An angle push rod (207) is hinged between the back of the upper angle clamping block (204) and the positioning cover (104) and between the back of the lower angle clamping block (206) and the base (1).

2. The positioning fixture for drilling a connecting seat according to claim 1, characterized in that: The positioning cover (104) is fixedly connected to a fixed end block (106) at the top of one end near the support base (103). A sleeve stud (107) is rotatably connected to the middle of the fixed end block (106). The sleeve stud (107) is rotatably connected to the positioning sleeve (105).

3. The positioning fixture for drilling a connecting seat according to claim 1, characterized in that: The push plate (101) is fixedly connected to a fixed seat (208) at one end away from the support seat (103). A baffle stud (209) is fixedly connected to the middle of the fixed seat (208). The baffle stud (209) is rotatably connected to the middle of the positioning baffle (203).

4. A positioning fixture for drilling a connecting seat according to claim 1, characterized in that: When the angle push rod (207) retracts and causes the upper angle clamping block (204) to flip upward, the lower surface of the upper angle clamping block (204) is flush with the lower surface of the positioning cover (104).

5. A positioning fixture for drilling a connecting seat according to claim 1, characterized in that: When the angle push rod (207) retracts and causes the lower angle clamp (206) to flip downward, the upper surface of the lower angle clamp (206) is flush with the upper surface of the push plate (101).

6. A positioning fixture for drilling a connecting seat according to claim 1, characterized in that: A cleaning brush (3) is fixedly connected to the rotating connection end of the upper angle clamping block (204) and the positioning cover (104), and the cleaning brush (3) slides in contact with the upper surface of the shaft hole workpiece (102).

7. A positioning fixture for drilling a connecting seat according to claim 6, characterized in that: The movable opening (205) and the rotating connection end of the lower angle clamp (206) are provided with a chip removal groove (301). The chip removal groove (301) is vertically corresponding to the cleaning brush (3), and a plurality of inner grooves (302) are evenly provided at the end of the chip removal groove (301) away from the lower angle clamp (206).

8. A positioning fixture for drilling a connecting seat according to claim 7, characterized in that: The lower angle clamp (206) and the rotating connection end of the movable port (205) are fixedly connected with a connecting tooth (303). The top of the connecting tooth (303) is flush with the upper surface of the lower angle clamp (206), and the connecting tooth (303) is inserted into the inner groove (302).

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