Drilling device for automobile upper swing arm assembly

Abstract

The invention relates to the field of machining, in particular to a drilling device for an automobile upper swing arm assembly. The device comprises a main tool and an integrated tool, and the main tool is configured to drill a swing arm hole of a swing arm on an automobile; a containing cavity penetrating through the side wall of the main cutter is formed in the main cutter, the integrated cutter comprises a countersink frame, countersink blades, a chamfering cutter frame and chamfering blades, one end of the countersink frame is rotationally arranged in the containing cavity of the main cutter, the two countersink blades are arranged on the two side faces of the countersink frame respectively, and the chamfering cutter frame is arranged on the countersink frame in a sliding mode in the extending direction of the countersink frame. The two chamfering blades are symmetrically arranged at the two ends, extending out of the countersink holder, of the chamfering cutter holder. Various types of tools are integrated together, the automobile upper swing arm can be vertically placed during machining, space is saved, double-hole drilling, plane finish machining and chamfering procedures can be completed through one-time workpiece clamping, the integration degree is high, economical efficiency is good, meanwhile, the clamping and tool setting procedures are simplified, and machining precision and machining efficiency are improved.

Description

Technical Field

[0001] The present invention relates to the field of machining, and particularly to a drilling device for an upper swing arm assembly of an automobile. Background Art

[0002] The upper swing arm of an automobile is an important part of the vehicle suspension system. It connects the wheel and the body and plays a key role in absorbing road vibrations during driving and maintaining the stability and comfort of the vehicle. When machining the swing arm hole of the upper swing arm of an automobile, multiple processes such as drilling, precision machining of the plane, and chamfering are required. In related technologies, when machining the swing arm hole of the upper swing arm, different processes require different equipment and tools, and multiple clamping and positioning operations are needed, which is cumbersome. In addition, some devices install multiple tools on a machining center at the same time. During machining, multiple clamping is not required, but the workbench needs to be displaced for tool alignment, and the numerous tools increase the machining area of the machining equipment, which is not conducive to space layout and has poor economy.

[0003] The information disclosed in the background art part of the present invention is only intended to deepen the understanding of the general background art of the present invention, and should not be regarded as an admission or any form of suggestion that this information constitutes the prior art known to those skilled in the art. Summary of the Invention

[0004] According to the deficiencies of the prior art, the present invention provides a drilling device for an upper swing arm assembly of an automobile to solve the problems of cumbersome operation and poor economy of the existing drilling devices for upper swing arms of automobiles.

[0005] A drilling device for an upper swing arm assembly of an automobile according to the present invention adopts the following technical solutions: including a main tool and an integrated tool; the main tool can rotate and move up and down to drill the swing arm hole of the upper swing arm of the automobile; a receiving cavity penetrating the side wall is arranged inside the main tool; The integrated tool includes a countersinking tool holder, countersinking blades, a chamfering tool holder, and chamfering blades; One end of the countersinking tool holder is rotatably arranged in the receiving cavity of the main tool. There are two countersinking blades, which are respectively arranged on both side surfaces of the countersinking tool holder. The countersinking blades can perform countersinking processing on the planes at both ends of the swing arm hole; the chamfering tool holder is slidably arranged on the countersinking tool holder along the extending direction of the countersinking tool holder. An elastic support member is arranged between the chamfering tool holder and the countersinking tool holder. The elastic support member makes the chamfering tool holder tend to rotate closer to the rotation center of the countersinking tool holder. The two ends of the chamfering tool holder extend out of the countersinking tool holder along the direction perpendicular to the extending direction of the countersinking tool holder. There are two chamfering blades, which are symmetrically arranged at the two ends of the chamfering tool holder extending out of the countersinking tool holder. The chamfering blades can chamfer the edges of the swing arm hole; The integrated tool is configured such that: in the drilling state, the countersinking tool holder drives the chamfering tool holder to be received into the main tool; in the countersinking plane state, the countersinking tool holder extends out of the main tool, the countersinking blade is exposed, and the chamfering tool holder is located inside the main tool; in the chamfering state, the countersinking tool holder extends out of the main tool, the countersinking blade is exposed, the chamfering tool holder is located outside the main tool, and the chamfering blade is exposed.

[0006] Optionally, a first slideway and a first water inlet are provided inside the main tool. The top of the first slideway is communicated with the first water inlet, the bottom is communicated with the accommodating cavity. A first movable block and a first long tube are slidably arranged in the first slideway. The first movable block is located above the first long tube. A first elastic member is arranged on the first long tube, and the first elastic member makes the first long tube tend to move upward. The lower end of the first long tube corresponds to one side of the countersinking tool holder close to its rotation center.

[0007] Optionally, the inside of the first long tube is hollow and communicated with the first slideway, and a first liquid outlet is opened at the bottom of the first long tube.

[0008] Optionally, a second slideway and a second water inlet are provided inside the main tool. The top of the second slideway is communicated with the second water inlet, the bottom is communicated with the accommodating cavity. A second movable block and a second long tube are slidably arranged in the second slideway. The second movable block is located above the second long tube. A second elastic member is arranged on the second long tube, and the second elastic member makes the second long tube tend to move upward. The lower end of the second long tube corresponds to one side of the countersinking tool holder far from its rotation center.

[0009] Optionally, the inside of the second long tube is hollow and communicated with the second slideway, and a second liquid outlet is opened at the bottom of the second long tube.

[0010] Optionally, the height of the cutting surface of the countersinking blade is greater than its opposite side.

[0011] Optionally, in the width direction of the chamfering tool holder, the distance from the cutting edge of the chamfering blade to the center of the chamfering tool holder is greater than the distance from the opposite edge to the center of the chamfering tool holder.

[0012] Optionally, the chamfering blade is detachably connected to the chamfering tool holder.

[0013] Optionally, the countersinking blade is detachably connected to the countersinking tool holder.

[0014] Optionally, the main tool includes a tool shank and a twist drill, and the twist drill is detachably connected to the lower end of the tool shank.

[0015] The beneficial effects of the present invention are as follows: The drilling device for the upper swing arm assembly of an automobile in the present invention integrates various types of tools. During processing, the upper swing arm of the automobile can be placed vertically, saving space. Moreover, there are two countersinking blades and two chamfering blades respectively. The workpiece can complete the drilling, plane finishing and chamfering processes of double holes with one clamping. The integration degree is high, the economy is good, and at the same time, the clamping and tool setting processes are simplified, and the processing accuracy and processing efficiency are improved. Brief Description of the Drawings

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0017] Figure 1 It is a usage state diagram of a drilling device for an upper swing arm assembly of an automobile according to the present invention; Figure 2 It is an overall schematic diagram of a drilling device for an upper swing arm assembly of an automobile according to the present invention in a drilling state; Figure 3 is Figure 2 the internal structure diagram of; Figure 4 is Figure 3 the enlarged view at position I in; Figure 5 is Figure 3 the enlarged view at position II in; Figure 6 It is an overall schematic diagram of a drilling device for an upper swing arm assembly of an automobile according to the present invention in a counterboring state; Figure 7 is Figure 6 the internal structure diagram; Figure 8 is Figure 7 the enlarged view at position III in; Figure 9 is Figure 8 the enlarged view at position IV in; Figure 10 It is an overall schematic diagram of a drilling device for an upper swing arm assembly of an automobile according to the present invention in a chamfering state; Figure 11 is Figure 10 the enlarged view at position V in; Figure 12 is Figure 10 the internal structure diagram of; Figure 13 is Figure 12 the enlarged view at position VI in.

[0018] In the figure: 100, upper swing arm; 200, Main tool; 201, Tool shank; 2011, Upper rod body; 2012, Lower rod body; 2013, First water inlet; 2014, First slideway; 2015, Second water inlet; 2016, Second slideway; 202, Twist drill bit; 203, First movable block; 204, Second movable block; 205, First long tube; 2051, First elastic member; 2052, First liquid outlet; 206, Second long tube; 2061, Second elastic member; 2062, Second liquid outlet; 2063, Stopper; 207, Limiting plate; 300, Integrated tool; 301, Countersink tool holder; 302, Support block; 303, Countersink blade; 304, Elastic support member; 305, Chamfering tool holder; 3051, Clamping block; 306, Chamfering blade. Specific embodiments

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0020] As Figures 1 to 13 shown, a drilling device for an upper swing arm assembly of an automobile provided by an embodiment of the present invention is used to process a swing arm hole of an upper swing arm 100 of an automobile, and includes a main tool 200 and an integrated tool 300.

[0021] The main tool 200 is configured to be rotatable and movable up and down to drill a swing arm hole of the upper swing arm 100 of the automobile; a receiving cavity penetrating through its side wall is provided inside the main tool 200, and the integrated tool 300 is arranged at the receiving cavity; specifically, the main tool 200 includes a tool shank 201 and a twist drill bit 202 provided at the bottom of the tool shank 201, and the twist drill bit 202 is used for drilling, and the receiving cavity is opened on the tool shank 201.

[0022] The integrated tool 300 includes a countersink tool holder 301, a countersink blade 303, a chamfering tool holder 305, and a chamfering blade 306.

[0023] One end of the countersinking tool holder 301 is rotatably arranged in the receiving cavity of the main tool 200. When the countersinking tool holder 301 rotates around its rotation center, it can be received into the receiving cavity or extended out of the receiving cavity. There are two countersinking blades 303 which are respectively arranged on both side surfaces of the countersinking tool holder 301, and the countersinking blades 303 can perform countersinking processing on the planes at both ends of the swing arm hole; the chamfering tool holder 305 is slidably arranged on the countersinking tool holder 301 along the extending direction of the countersinking tool holder 301. An elastic support member 304 is arranged between the chamfering tool holder 305 and the countersinking tool holder 301. The elastic support member 304 makes the chamfering tool holder 305 tend to be close to the rotation center of the countersinking tool holder 301. Along the direction perpendicular to the extension of the countersinking tool holder 301, both ends of the chamfering tool holder 305 extend out of the countersinking tool holder 301. There are two chamfering blades 306 which are symmetrically arranged at both ends of the chamfering tool holder 305 extending out of the countersinking tool holder 301, and the chamfering blades 306 can chamfer the edges of the swing arm hole.

[0024] The integrated tool 300 is configured such that: in the drilling state, the countersinking tool holder 301 drives the chamfering tool holder 305 to be received into the main tool 200; in the countersinking plane state, the countersinking tool holder 301 extends out of the main tool 200, the countersinking blades 303 are exposed, and the chamfering tool holder 305 is located inside the main tool 200; in the chamfering state, the countersinking tool holder 301 extends out of the main tool 200, the countersinking blades 303 are exposed, the chamfering tool holder 305 is located outside the main tool 200, and the chamfering blades 306 are exposed.

[0025] Refer to Figure 1 , the upper swing arm 100 of an automobile generally includes a C-shaped body and shaft protrusions arranged at both ends of the C-shaped body. Swing arm holes are formed in the shaft protrusions for installing structures such as rubber sleeves; the processing of the swing arm holes generally includes drilling, finish machining of both ends of the plane, and chamfering. In the related art, when some devices process the swing arm holes, they usually drill holes on a drilling device, then disassemble the workpiece and replace it with another device for countersinking the plane, and then replace it with another device for chamfering. This processing method requires frequent disassembly and clamping of the workpiece, which is time-consuming and laborious and has low efficiency; when other devices process the swing arm holes, the upper swing arm 100 of the automobile is placed horizontally, and multiple tools are installed on the same device to process the swing arm holes. There are many tools, which is not only poor in economy, but also increases the area of the processing region. At the same time, the workbench needs to move multiple times for tool alignment according to the process during the processing, which is not conducive to improving the efficiency and accuracy.

[0026] The solution provided by the embodiment of the present invention integrates various types of cutting tools. When processing, the upper swing arm 100 of the vehicle can be placed vertically, saving space. When drilling, the integrated cutting tool 300 is received inside the main cutting tool 200, and the main cutting tool 200 completes the double-hole processing from top to bottom at one time. After that, the countersinking tool holder 301 unfolds and extends out of the main cutting tool 200, exposing the countersinking blade 303. Since there are two countersinking blades 303, the lower countersinking blade 303 is used when processing the upper end face, and the upper countersinking blade 303 is used when processing the lower end face. The finish machining of the plane can be completed without changing the tool. After that, the chamfering tool holder 305 moves outward along the countersinking tool holder 301 and extends out of the main cutting tool 200, and the chamfering blade 306 is exposed. Similarly, since there are two chamfering blades 306, the lower chamfering blade 306 is used when processing the edge of the upper end face of the swing arm hole, and the upper chamfering blade 306 is used when processing the edge of the lower end face of the swing arm hole. The chamfering operation of the double holes can also be completed without changing the tool. It has a high degree of integration, good economy, simplifies the clamping and tool setting processes, and improves the machining accuracy and machining efficiency.

[0027] In a further embodiment, to facilitate the control and switching of the state of the integrated cutting tool 300, a first control component and a second control component are provided inside the main cutting tool 200.

[0028] Among them, the first control component includes a first movable block 203 and a first long tube 205. A first slideway 2014 and a first water inlet 2013 are provided inside the main cutting tool 200. The top of the first slideway 2014 is communicated with the first water inlet 2013, and the bottom is communicated with the accommodation cavity. The first movable block 203 and the first long tube 205 are slidably arranged in the first slideway 2014. The first movable block 203 is located above the first long tube 205. A first elastic member 2051 is provided on the first long tube 205. The first elastic member 2051 makes the first long tube 205 tend to move upward and thus abut against the first movable block 203. The lower end of the first long tube 205 corresponds to one side of the countersinking tool holder 301 close to its rotation center. Water is injected into the first slideway 2014 through the first water inlet 2013. Under the action of water pressure, the first movable block 203 moves downward and pushes the first long tube 205 downward. When the first long tube 205 moves downward, it can push the top surface of one end of the countersinking tool holder 301 close to the rotation center, so that the countersinking tool holder 301 rotates upward and is received inside the main cutting tool 200.

[0029] It should also be noted that the countersinking tool holder 301 is rotatably connected to the main cutting tool 200 with resistance, that is, after the countersinking tool holder 301 is received inside the main cutting tool 200, without external force, it will not easily rotate to extend out of the main cutting tool 200.

[0030] Among them, the second control component includes a second movable block 204 and a second long tube 206. A second slideway 2016 and a second water inlet 2015 are arranged in the main tool 200. The top of the second slideway 2016 is communicated with the second water inlet 2015, and the bottom is communicated with the accommodating cavity. The second movable block 204 and the second long tube 206 are slidably arranged in the second slideway 2016. The second movable block 204 is located above the second long tube 206. A second elastic member 2061 is arranged on the second long tube 206. The second elastic member 2061 makes the second long tube 206 tend to move upward and thus abut against the second movable block 204. The lower end of the second long tube 206 corresponds to one side of the countersink tool holder 301 away from its rotation center. Water is injected into the second slideway 2016 through the second water inlet 2015. Under the action of water pressure, the second movable block 204 moves downward and pushes the second long tube 206 to move downward. When the second long tube 206 moves downward, it can limit the positions of the countersink tool holder 301 and the chamfering tool holder 305, so that the countersink tool holder 301 and the chamfering tool holder 305 have correct positions.

[0031] Specifically, in the initial state, the first water inlet 2013 and the second water inlet 2015 do not inject water. The second long tube 206 is in the state of being retracted upward, and the countersink tool holder 301 is received inside the main tool 200.

[0032] When drilling the swing arm hole, referring to Figure 2 、 Figure 3 、 Figure 4 and Figure 5 , water is injected into the second water inlet 2015. Under the action of water pressure, the second movable block 204 moves downward and pushes the second long tube 206 to move downward. The lower end of the second long tube 206 abuts against the chamfering blade 306, preventing the countersink tool holder 301 from rotating and avoiding the countersink tool holder 301 being thrown outwards under the action of centrifugal force, ensuring that the main tool 200 smoothly drills the swing arm hole. When countersinking the two end faces of the swing arm hole, referring to Figure 6 、 Figure 7 、 Figure 8 and Figure 9 , stop injecting water into the second water inlet 2015. The second long tube 206 rises, and the main tool 200 rotates slowly. The countersink tool holder 301 rotates to extend out of the main tool 200 under the action of centrifugal force. At this time, the chamfering tool holder 305 basically keeps its position unchanged under the action of the elastic support member 304. Then, water is injected into the second water inlet 2015 again. The second long tube 206 descends and abuts against the countersink tool holder 301, and at the same time hinders the extreme position of the chamfering tool holder 305 from moving outwards. The main tool 200 rotates at a normal speed. The chamfering tool holder 305 stops moving after moving to abut against the second long tube 206 and is thus restricted inside the main tool 200. The countersink blade 303 performs a countersinking process on the end face of the swing arm hole. When chamfering the edge of the swing arm hole, referring to Figure 10 、 Figure 11 、 Figure 12 andFigure 13 , the main tool 200 stops rotating, the chamfering tool rest 305 resets, the second water inlet 2015 stops injecting water, the second long pipe 206 resets to make way for the movement of the chamfering tool rest 305, the main tool 200 rotates rapidly, and the chamfering tool rest 305 moves outward to the limit position under the action of centrifugal force, overcoming the elastic force of the elastic support 304. The second water inlet 2015 injects water, and the second long pipe 206 moves downward to abut against the countersinking tool rest 301. At the same time, the chamfering tool rest 305 is blocked to prevent the chamfering tool rest 305 from resetting. At this time, the chamfering tool rest 305 extends out of the main tool 200, and the chamfering blade 306 is exposed. The main tool 200 rotates at a normal speed and uses the chamfering blade 306 to chamfer the edge of the swing arm hole.

[0033] Further, the first long pipe 205 is hollow inside and communicates with the first slideway 2014. The bottom of the first long pipe 205 is provided with a first liquid outlet 2052. When water is passed into the first slideway 2014, the water in the first slideway 2014 can enter the first long pipe 205 through the gap between the first slideway 2014 and the first movable block 203 and flow out from the first liquid outlet 2052, which is convenient for cooling the workpiece.

[0034] The second long pipe 206 is hollow inside and communicates with the second slideway 2016. The bottom of the second long pipe 206 is provided with a second liquid outlet 2062. When water is passed into the second slideway 2016, the water in the second slideway 2016 can enter the second long pipe 206 through the gap between the second slideway 2016 and the second movable block 204 and flow out from the second liquid outlet 2062 to cool the workpiece.

[0035] Further, for the convenience of structural arrangement and machining and assembly, the tool bar 201 of the main tool 200 includes an upper rod body 2011 and a lower rod body 2012. The upper rod body 2011 is detachably connected to the lower rod body 2012. The twist drill 202 is connected to the lower rod body 2012. The receiving cavity is opened in the lower rod body 2012, and a stepped surface is provided in the lower rod body 2012 to install the first elastic member 2051 and the second elastic member 2061.

[0036] It should be further supplemented that after the countersinking tool rest 301 rotates to the horizontal state, its bottom surface contacts and stops against the bottom surface of the receiving cavity on the main tool 200, and thus it cannot continue to rotate to ensure that the countersinking tool rest 301 is in the horizontal state. At the same time, a limiting plate 207 is arranged inside the receiving cavity of the main tool 200. The limiting plate 207 is located on one side of the countersinking tool rest 301 close to its rotation center. The limiting plate 207 is used to limit the rotation angle of the countersinking tool rest 301 so that the countersinking tool rest 301 remains in the horizontal state when it extends out of the main tool 200. Among them, an avoidance groove is opened at the bottom of the limiting plate 207, and the avoidance groove is used to make way for the chamfering tool rest 305 when the countersinking tool rest 301 rotates.

[0037] In a further embodiment, referring to Figure 9 A clamping block 3051 is provided on the chamfering tool holder 305, and a stopper 2063 is provided on the second long tube 206. In the countersinking state, the clamping block 3051 and the stopper 2063 are stopped to prevent the second long tube 206 from moving upward, so that the second long tube 206 can limit the countersinking tool holder 301 more reliably, avoiding the countersinking tool holder 301 from having a tendency to retract, and ensuring that the countersinking blade 303 can reliably process the workpiece.

[0038] In a further embodiment, the height of the cutting surface of the countersinking blade 303 is greater than the opposite side thereof, so as to prevent the rear side (the end surface located behind the cutting surface along the rotation direction) of the countersinking blade 303 from damaging the cut surface of the workpiece. Figure 11 From the perspective, a refers to the cutting surface of the countersinking blade 303 .

[0039] In a further embodiment, the side opposite to the cutting surface of the chamfering blade 306 is a beveled surface, so that in the width direction of the chamfering tool holder 305, the distance from the cutting edge of the chamfering blade 306 to the center of the chamfering tool holder 305 is greater than the distance from the edge opposite to the center of the chamfering tool holder 305, so that the edge opposite to the cutting edge of the chamfering blade 306 does not contact the cut surface of the workpiece, preventing the rear side of the chamfering blade 306 (the end face located behind the cutting surface along the rotation direction) from damaging the cut surface of the workpiece. It can be understood that the chamfering blade 306 is tilted, and the cutting surface of the chamfering blade 306 is on the same side as the cutting surface of the countersinking blade 303. Figure 11 From the perspective, b indicates the cutting edge of the chamfering blade 306 .

[0040] In a further embodiment, in order to facilitate the installation of the chamfering tool holder 305 on the countersinking tool holder 301, refer to Figure 5 , Figure 8 and Figure 13 The countersinking tool holder 301 is U-shaped as a whole, and the opening is located at the end face of one end away from its rotation center. The chamfering tool holder 305 is slidably inserted into the interior of the countersinking tool holder 301 from the opening. A support block 302 is provided inside the countersinking tool holder 301. The support block 302 is detachably connected to the countersinking tool holder 301 and is located at the opening of the countersinking tool holder 301. The elastic support member 304 is connected between the chamfering tool holder 305 and the support block 302. The countersinking blade 303 is detachably connected to the two side surfaces of the countersinking tool holder 301 (specifically, the upper and lower side surfaces after the countersinking tool holder 301 is flattened). The countersinking blade 303 is U-shaped to avoid the chamfering tool holder 305 and facilitate the sliding of the chamfering tool holder 305.

[0041] In a further embodiment, the first liquid outlet 2052 penetrates the first long tube 205 along the radial direction of the first long tube 205 , and the first liquid outlet 2052 has a greater height in the vertical direction to avoid the chamfering tool holder 305 when the countersinking tool holder 301 rotates.

[0042] Further, the chamfering blade 306 is detachably connected to the chamfering tool holder 305, facilitating the replacement of the chamfering blade 306.

[0043] Further, the twist drill 202 of the main tool 200 is detachably connected to the tool shank 201, facilitating the replacement of the twist drill 202.

[0044] Further, preferably in the present invention, the first elastic member 2051, the second elastic member 2061, and the elastic support member 304 are all springs.

[0045] It should also be added that the drilling device for the upper swing arm assembly of the vehicle in the present invention further includes a drill press body (not shown in the figure). A power mechanism and an operating table are provided on the drill press body. The main tool 200 is installed on the power mechanism, and the power mechanism is used to drive the main tool 200 to rotate and move up and down. A fixture is provided on the operating table to clamp and position the upper swing arm 100.

[0046] Combined with the above embodiments, the working principle and process of the present invention are as follows: In the initial state, the second long tube 206 retracts upward, the countersinking tool holder 301 is received into the lower rod body 2012, the chamfering tool holder 305 is located at the first liquid outlet 2052. The upper swing arm 100 is installed on the workbench in a vertical posture and positioned and clamped, and the tool is aligned to position the main tool 200 at the drilling position.

[0047] In the drilling state, referring to Figure 2 , Figure 3 , Figure 4 and Figure 5 , at this time, water is injected through the second water inlet 2015 and the second slideway 2016. The second movable block 204 moves downward under the action of water pressure. The second movable block 204 pushes the second long tube 206, causing the second long tube 206 to move downward until the second long tube 206 abuts against the chamfering blade 306. During the water injection process, the water in the second slideway 2016 enters the second long tube 206 through the gap between the second movable block 204 and the second slideway 2016 and flows out from the second liquid outlet 2062 to cool and lower the temperature of the workpiece. Then, the main tool 200 is rotated. Since the second long tube 206 is pressed against the chamfering blade 306, when the main tool 200 rotates, the integrated tool 300 will not be thrown out due to centrifugal force. At this time, the upper swing arm 100 is drilled using the twist drill 202. When processing in this state, water can be injected into the first long tube 205 so that the coolant flows out from the second liquid outlet 2062 to better cool and lower the temperature of the workpiece.

[0048] After the drilling is completed, the main tool 200 is lifted, the first water inlet 2013 and the second water inlet 2015 stop passing water, and the second long tube 206 resets upward, and the device switches to the countersinking plane state. Referring to Figure 6 ,Figure 7 , Figure 8 and Figure 9 , at this time, first make the main tool 200 rotate slowly. The countersink tool holder 301 is thrown out under the action of centrifugal force. Since the rotation speed of the main tool 200 is slow, the centrifugal force borne by the chamfering tool holder 305 is not enough to overcome the elastic force of the elastic support 304. Therefore, the position of the chamfering tool holder 305 relative to the countersink tool holder 301 basically does not change. Then, water is passed through the second water inlet 2015, and the second long tube 206 moves downward to abut against the countersink tool holder 301. Then, the main tool 200 is rotated at a normal speed. At this time, the chamfering tool holder 305 will move outward along the countersink tool holder 301 under the action of centrifugal force. When it moves to the second long tube 206, the chamfering tool holder 305 cannot move any further. The chamfering tool holder 305 is still inside the main tool 200. And at this time, the clamping block 3051 is clamped with the stop block 2063, preventing the second long tube 206 from moving upward. The abutment between the second long tube 206 and the countersink tool holder 301 is more reliable, so that the countersink tool holder 301 will not retract when a downward force is applied. When machining the upper end face of the swing arm hole, after the countersink tool holder 301 extends out of the main tool, the main tool 200 moves downward until the lower countersink blade 303 contacts the workpiece end face, and the main tool 200 rotates to machine this plane. When machining the lower end face of the swing arm hole, the main tool 200 first passes through the swing arm hole, and then the countersink tool holder 301 extends out, and the upper countersink blade 303 is used to machine the lower end face. The same principle applies when machining the lower swing arm hole. When machining in this state, water can be injected into the first long tube 205 so that the coolant flows out from the second liquid outlet 2062 to better cool and cool down the workpiece.

[0049] When the two end faces of the swing arm hole are countersunk flat, the main tool 200 stops rotating, and the device enters the chamfering state. Refer to Figure 10 , Figure 11 , Figure 12 , Figure 13, at this time, the second water inlet 2015 stops injecting water, the first long tube 205 and the second long tube 206 reset upward, so that the main tool 200 rotates rapidly. The chamfering tool holder 305 moves under the action of centrifugal force to overcome the elastic force of the elastic support 304 until it abuts against the support block 302. After that, water is injected into the second water inlet 2015 to make the second long tube 206 move downward and abut against the countersinking tool holder 301. Then the main tool 200 resumes its normal rotation speed. Since the second long tube 206 abuts against the chamfering tool holder 305 on the side close to the center of the main tool 200, the chamfering tool holder 305 cannot be retracted at this time, and the chamfering blade 306 can chamfer the swing arm hole. When machining the upper edge of the swing arm hole above, after the chamfering tool holder 305 extends, the main tool 200 moves downward until the lower chamfering blade 306 contacts the edge of the swing arm hole, and the main tool 200 rotates to machine this plane. When machining the lower edge of the swing arm hole below, the main tool 200 first passes through the swing arm hole, and then the countersinking tool holder 301 and the chamfering tool holder 305 extend, and the upper chamfering blade 306 is used to machine the lower edge. Usually, the edges that need to be chamfered are the two edges of the two swing arm holes that are far away from each other. The same principle applies when machining other edges. When machining in this state, the second long tube 206 continuously injects water, so that the second long tube 206 reliably abuts against the countersinking tool holder 301. The first long tube 205 does not inject water, and the first long tube 205 has a small top thrust on the countersinking tool holder 301 under the support of the first elastic member 2051, preventing the countersinking tool holder 301 from being retracted.

[0050] After the machining is completed, the water injection into the second water inlet 2015 is stopped, and the second long tube 206 is retracted. Then water is injected into the first water inlet 2013, and the first long tube 205 moves downward to push the countersinking tool holder 301 to make the countersinking tool holder 301 rotate and retract. After the countersinking tool holder 301 is retracted, the chamfering tool holder 305 is located at the first liquid outlet 2052. The water injection into the first long tube 205 is stopped, and the supporting force of the first elastic member 2051 on the first long tube 205 is basically balanced with the gravity of the first long tube 205 and the first movable block 203. The first long tube 205 does not generate an upward pulling force on the chamfering tool holder 305, and the countersinking tool holder 301 is received in the main tool 200, and the device returns to its initial state.

[0051] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A drilling device for the upper swing arm assembly of an automobile, characterized in that, It includes a main tool and an integrated tool; the main tool can rotate and move up and down to drill the swing arm holes of the upper swing arm of an automobile; a receiving cavity penetrating through its side wall is arranged inside the main tool; The integrated tool includes a countersinking tool holder, countersinking blades, a chamfering tool holder and chamfering blades; One end of the countersinking tool holder is rotatably arranged in the receiving cavity of the main tool. There are two countersinking blades which are respectively arranged on both side surfaces of the countersinking tool holder. The countersinking blades can perform countersinking processing on the planes at both ends of the swing arm hole. The chamfering tool holder is slidably arranged on the countersinking tool holder along the extending direction of the countersinking tool holder. An elastic support member is arranged between the chamfering tool holder and the countersinking tool holder. The elastic support member makes the chamfering tool holder tend to approach the rotation center of the countersinking tool holder. The two ends of the chamfering tool holder extend out of the countersinking tool holder along the direction perpendicular to the extension of the countersinking tool holder. There are two chamfering blades which are symmetrically arranged at the two ends where the chamfering tool holder extends out of the countersinking tool holder. The chamfering blades can chamfer the edges of the swing arm hole; The integrated tool is configured such that in the drilling state, the countersinking tool holder drives the chamfering tool holder to be received into the main tool; in the countersinking plane state, the countersinking tool holder extends out of the main tool, the countersinking blades are exposed, and the chamfering tool holder is located inside the main tool; In the chamfering state, the countersinking tool holder extends out of the main tool, the countersinking blades are exposed, the chamfering tool holder is located outside the main tool, and the chamfering blades are exposed.

2. The drilling device for the upper swing arm assembly of an automobile according to claim 1, wherein A first slideway and a first water inlet are arranged inside the main tool. The top of the first slideway is communicated with the first water inlet, and the bottom is communicated with the receiving cavity. A first movable block and a first long tube are slidably arranged in the first slideway. The first movable block is located above the first long tube. A first elastic member is arranged on the first long tube. The first elastic member makes the first long tube tend to move upward. The lower end of the first long tube corresponds to one side of the countersinking tool holder close to its rotation center.

3. The drilling device for the upper swing arm assembly of an automobile according to claim 2, characterized in that, The inside of the first long tube is hollow and is communicated with the first slideway. A first liquid outlet is opened at the bottom of the first long tube.

4. A drilling device for the upper swing arm assembly of an automobile according to claim 2, characterized in that A second slideway and a second water inlet are arranged inside the main tool. The top of the second slideway is communicated with the second water inlet, and the bottom is communicated with the receiving cavity. A second movable block and a second long tube are slidably arranged in the second slideway. The second movable block is located above the second long tube. A second elastic member is arranged on the second long tube. The second elastic member makes the second long tube tend to move upward. The lower end of the second long tube corresponds to one side of the countersinking tool holder far from its rotation center.

5. The drilling device for the upper swing arm assembly of an automobile according to claim 4, characterized in that The inside of the second long tube is hollow and is communicated with the second slideway. A second liquid outlet is opened at the bottom of the second long tube.

6. The drilling device for the upper swing arm assembly of an automobile according to claim 1, characterized in that, The height of the cutting surface of the countersinking blade is greater than its opposite side surface.

7. A drilling device for the upper swing arm assembly of an automobile according to claim 1, characterized in that, In the width direction of the chamfering tool holder, the distance from the cutting edge of the chamfering blade to the center of the chamfering tool holder is greater than the distance from the opposite edge to the center of the chamfering tool holder.

8. The drilling device for the upper swing arm assembly of an automobile according to claim 1, characterized in that, The chamfering blade is detachably connected to the chamfering tool holder.

9. A drilling device for the upper swing arm assembly of an automobile according to claim 1, characterized in that The countersinking blade is detachably connected to the countersinking tool holder.

10. The drilling device for the upper swing arm assembly of an automobile according to claim 1, characterized in that, The main tool includes a tool rod and a twist drill bit. The twist drill bit is detachably connected to the lower end of the tool rod.

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