Chip testing manual mechanical arm capable of achieving multi-angle adjustment

Abstract

The invention discloses a chip testing manual mechanical arm capable of realizing multi-angle adjustment, which comprises a bottom plate, a stand column and a lifting plate, the lifting plate is rotatably connected with a first section arm, the first section arm is rotatably connected with a second section arm, the second section arm is rotatably connected with a third section arm, the third section arm is connected with a rotating shaft index plate, and the rotating shaft index plate is connected with a rotating shaft. Connecting shafts and locking pieces are connected between the lifting plate and the first section arm, between the first section arm and the second section arm and between the second section arm and the third section arm, a rotating shaft is arranged in the third section arm in a penetrating mode, a first positioning assembly and a second positioning assembly are arranged on the third section arm, the second positioning assembly comprises a fixing plate, and a pressing plate is connected to the side face of the fixing plate. A second locking handle is rotationally arranged on the fixing plate, and the locking end of the second locking handle is in threaded connection with the pressing plate. The chip testing device has the advantages of being capable of meeting chip testing of different testing angles, simple in structure, easy to machine and assemble, low in production cost, capable of adapting to detection of a small number of chips and low in detection cost.

Description

Technical Field

[0001] The present invention relates to the technical field of chip testing, and in particular to a manual mechanical arm for chip testing which can realize multi-angle adjustment. Background Art

[0002] With the development of science and technology, the chip industry is developing faster and faster. The miniaturization and multi-function of chips are the development trend of the modern chip industry. Since chip production requires hundreds of steps, any error in any step may cause the device to fail, so the chip testing link is crucial. Chip testing requires the use of a chip tester. During the test, the chip needs to be placed between the test head and the machine of the chip tester. The test head is driven to move by a robotic arm to achieve chip testing. Existing robotic arms are mostly intelligent robot arms, which are expensive and not conducive to the development of small and medium-sized enterprises;

[0003] Some manual test manipulators cannot achieve testing at any angle and have low applicability. For example, a chip test manipulator disclosed in patent publication number CN115184780A is also a manual manipulator, but its structure is relatively complex and it cannot drive the test head to rotate at any angle, resulting in limitations in chip testing. Summary of the invention

[0004] The object of the present invention is to provide a manual robot arm for chip testing that can achieve multi-angle adjustment, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: A manual mechanical arm for chip testing that can achieve multi-angle adjustment, comprising a base plate, a column is provided on the base plate, a lifting plate is connected to the column, a first section arm is rotatably connected to the lifting plate, the first section arm is rotatably connected to the second section arm, the second section arm is rotatably connected to the third section arm, the third section arm is connected to a rotating shaft indexing plate, a connecting shaft and a locking member are connected between the lifting plate and the first section arm, the first section arm and the second section arm, and the second section arm and the third section arm, a rotating shaft is penetrated in the third section arm, the rotating shaft is inserted in the center of the rotating shaft indexing plate and is fixedly connected to the rotating shaft indexing plate, a first positioning assembly and a second positioning assembly are provided on the third section arm, the second positioning assembly comprises a fixed plate, a side of the fixed plate close to the rotating shaft indexing plate is connected to a pressing plate, the fixed plate and the pressing plate are respectively arranged on both sides of the rotating shaft indexing plate, a second locking handle is rotatably arranged on the fixed plate, and the locking end of the second locking handle is screwed to the pressing plate.

[0006] Further preferably, the rotating shaft dividing plate is a circular structure, and a plurality of positioning holes are provided on the rotating shaft dividing plate along its circumferential direction for positioning and fixing the rotating shaft dividing plate at different angles; a circular mounting plate is provided on the side of the rotating shaft dividing plate away from the third arm section for fixing a test head for chip testing.

[0007] Further preferably, the first positioning assembly includes a fixed block and a first positioning pin, the fixed block is fixed to the side of the third arm section, the first positioning pin is screwed to the fixed block, the end of the first positioning pin is a smooth rod and matches the positioning hole, the first positioning pin can be moved relative to the fixed block by rotating, and the smooth rod part of the first positioning pin is inserted into the positioning hole to fix the rotating shaft dividing plate.

[0008] Further preferably, the pressure plate is L-shaped and is clamped on the edge of the rotating shaft dividing plate so as not to hinder the rotation of the rotating shaft dividing plate; a pad is provided between the pressure plate and the fixed plate, and the pad is provided on the side of the rotating shaft dividing plate away from the pressure plate, which can assist the pressure plate in pressing and fixing the rotating shaft dividing plate.

[0009] Further preferably, at least one of the facing sides of the pad and the pressure plate has an anti-slip structure, which can increase the friction between the pad and / or the pressure plate and the rotating shaft dividing plate, thereby improving the positioning and fixing effect of the rotating shaft dividing plate.

[0010] Further preferably, the locking member includes a locking block and a first locking handle, the locking block is provided with a connecting shaft hole and a locking hole, the connecting shaft hole is connected with a slot passing through the locking block, the locking hole passes through the locking block and crosses the slot vertically, the first locking handle is cooperatively connected with the locking hole, the connecting shaft hole is used for the interlaced connection of the connecting shaft, and the gap of the slot can be reduced by rotating the locking hole through the first locking handle, thereby driving the connecting shaft hole to deform, locking the connecting shaft, and realizing the fixing of the position of the third section arm relative to the second section arm, the second section arm relative to the first section arm, and the first section arm relative to the lifting plate.

[0011] Further preferably, at least one fault-tolerant groove is provided on the locking block, and the fault-tolerant groove is connected to the connecting shaft hole. The cross-section of the fault-tolerant groove away from the connecting shaft hole end is wider than the cross-section close to the connecting shaft hole end, thereby reducing the difficulty of deformation of the connecting shaft hole.

[0012] Further preferably, the lifting plate is provided with two connecting seats connected to the first arm section, and the connecting shaft between the lifting plate and the first arm section is rotatably installed between the two connecting seats, and the connecting seat is used for installing the connecting shaft, so as to facilitate the rotation of the first arm section relative to the lifting plate; the first arm section and the third arm section are connected to the ends close to the second arm section with a connecting shaft, and the locking members matching the three connecting shafts are respectively fixed on the connecting seats and the two ends of the second arm section, and the third arm section is rotated relative to the second arm section and the second arm section is rotated relative to the first arm section through the connecting shaft, so as to realize the position adjustment of the rotating shaft dividing plate and the connected test head; the second arm section is I-shaped, and the first arm section and the second arm section are respectively rotatably arranged in the I-shaped groove of the second arm section, so as to facilitate the rotation of the third rotating arm relative to the second arm section and the second arm section relative to the first arm section.

[0013] Further preferably, a linear guide rail and an accordion curtain are connected between the lifting plate and the column, the accordion curtain cover is arranged on the outside of the linear guide rail, and the two accordion curtains are arranged on the upper and lower sides of the lifting plate. The linear guide rail facilitates the connection between the lifting plate and the column and the lifting of the lifting plate. The accordion curtain is used to prevent dust and insects, and its protective effect is good.

[0014] Further preferably, the lifting plate is provided with a third positioning assembly, the third positioning assembly includes a second positioning pin, a thread screwed to the lifting plate is provided in the middle of the second positioning pin, a connecting rod is vertically connected to the end of the second positioning pin away from the pin head, and balls are provided at both ends of the connecting rod. The second positioning pin is conveniently rotated through the connecting rod to rotate on the lifting plate, and the pin head of the second positioning pin can press the column or the linear guide rail to lock the lifting plate on the linear guide rail, so as to fix the lifting plate after the height is adjusted; the balls at both ends of the connecting rod can prevent the connecting rod from falling off the second positioning pin, and are convenient for the staff to hold and apply force.

[0015] Beneficial effects: The manual mechanical arm for chip testing that can achieve multi-angle adjustment of the present invention can achieve the front-to-back and left-to-right rotation of the first arm section, the second arm section and the third arm section through the setting of the connecting shaft and the locking piece, so as to achieve the position adjustment of the rotating shaft indexing plate, and then achieve the position adjustment of the test head for chip testing, so as to achieve chip testing at different positions with convenient adjustment; the rotating shaft indexing plate can be rotated to a set angle or a special angle through the first positioning component and the second positioning component, so as to meet the chip testing at different test angles; specifically, the first positioning pin of the first positioning component cooperates with the positioning hole of the rotating shaft indexing plate to achieve the setting Angle adjustment; the second locking handle of the second positioning component can pull the pressure plate closer to the shaft dividing plate, and the shaft dividing plate is fixed by pressing the pressure plate against the shaft dividing plate, which can realize the fixation of the shaft dividing plate at any rotation angle, that is, the chip test at a special angle can be realized; the second positioning pin of the third positioning component can fix the lifting plate on the column, so that the height of the lifting plate can be adjusted, and then the height of the test head can be adjusted; the manual robotic arm has a simple structure, is easy to process and assemble, and has a low production cost. At the same time, it is simple to adjust, can adapt to the detection of a small number of chips, and has a low detection cost, which is conducive to the use and development of small and medium-sized enterprises. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the isometric structure of a manual mechanical arm for chip testing that can achieve multi-angle adjustment according to an embodiment of the present invention;

[0017] Figure 2 A schematic diagram of a structure in which a first arm section, a second arm section and a third arm section are connected to each other according to an embodiment of the present invention;

[0018] Figure 3 A schematic diagram of the matching structure between the first arm section and the second arm section disclosed in an embodiment of the present invention;

[0019] Figure 4 A schematic diagram of the matching structure between the second arm section, the third arm section and the rotating shaft indexing plate disclosed in an embodiment of the present invention;

[0020] Figure 5 It is a schematic structural diagram of the locking block disclosed in an embodiment of the present invention.

[0021] Figure markings: 1-base plate, 2-column, 3-lifting plate, 4-first arm section, 41-avoidance groove, 5-second arm section, 6-third arm section, 7-rotating shaft dividing plate, 71-positioning hole, 72-mounting plate, 8-connecting shaft, 9-locking piece, 91-locking block, 911-connecting shaft hole, 912-slot, 913-locking hole, 914-fault-tolerant groove, 92-first locking handle, 10-rotating shaft, 11-first positioning assembly, 111-fixed block, 112-first positioning pin, 12-second positioning assembly, 121-fixed plate, 122-pressure plate, 123-second locking handle, 124-pad, 13-connecting seat, 14-third positioning assembly, 141-second positioning pin, 142-connecting rod, 15-organ curtain, 16-foot, 17-universal wheel. DETAILED DESCRIPTION

[0022] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0023] like Figure 1-5As shown, a manual mechanical arm for chip testing that can achieve multi-angle adjustment is used to connect with the test head of the chip test, can be moved in a specific space, and is easy to adjust manually, so as to drive the test head of the chip tester to move, and realize the detection of a small number of chips, which is convenient and low in cost. The manual mechanical arm includes a base plate 1, a column 2 is provided on the base plate 1, a lifting plate 3 is connected to the column 2, a first section arm 4 is rotatably connected to the lifting plate 3, the first section arm 4 is rotatably connected to the second section arm 5, the second section arm 5 is rotatably connected to the third section arm 6, the third section arm 6 is connected to the rotating shaft indexing plate 7, a connecting shaft 8 and a locking member 9 are connected between the lifting plate 3 and the first section arm 4, the first section arm 4 and the second section arm 5, and the second section arm 5 and the third section arm 6, a rotating shaft 10 is inserted in the third section arm 6, and the rotating shaft 10 is inserted in the center of the rotating shaft indexing plate 7 and fixedly connected to the rotating shaft indexing plate 7. Among them, the bottom plate 1 is used to support the column 2, and the foot 16 and the universal wheel 17 are set below the bottom plate 1. The height of the foot 6 is adjustable, which can fix the bottom plate 1 to prevent it from moving. At the same time, the column 2 and the segment arm and the test head connected thereto can be pushed to move through the universal wheel 17 to realize the position movement of the manual mechanical arm; the first segment arm 4, the second segment arm 5 and the third segment arm 6 can rotate relatively, so that the connected rotating shaft indexing plate 7 and the test head can move forward and backward and left and right in the corresponding horizontal plane, which is convenient for the test head to test the chip; the rotating shaft indexing plate 7 can rotate, which can meet the test head's chip testing at different angles. Specifically, the third segment arm 6 is provided with a first positioning component 11 and a second positioning component 12. The first positioning component 11 can be used to position and fix the rotating shaft indexing plate 7 to a set angle, so as to realize the rotation of the test head to a set angle; the second positioning component 12 can be used to position and fix the rotating shaft indexing plate 7 after rotating at any angle, so as to realize the rotation of the test head at any angle, so as to realize the test of chips placed at any angle, and the adaptability is high. The second positioning assembly 12 comprises a fixing plate 121, and a pressing plate 122 is connected to the side of the fixing plate 121 close to the rotating shaft indexing plate 7. The fixing plate 121 and the pressing plate 122 are respectively arranged on both sides of the rotating shaft indexing plate 7. A second locking handle 123 is rotatably arranged on the fixing plate 121, and the locking end of the second locking handle 123 is screwed to the pressing plate 122. The fixing plate 121 is used for installing the pressing plate 122 and the second locking handle 123. The pressing plate 122 can be pressed against the rotating shaft indexing plate 7 through the second locking handle 123, thereby realizing the positioning and fixing of the rotating shaft indexing plate 7.

[0024] In one solution of the present application, the rotating shaft indexing plate 7 is a circular structure, and a plurality of positioning holes 71 are provided on the rotating shaft indexing plate 7 along its circumferential direction. The rotating shaft indexing plate 7 can be fixed by cooperating with the positioning holes 71 and the first positioning assembly 11, so as to realize the positioning and fixing of the rotating shaft indexing plate 7. Since the positioning holes 71 on the rotating shaft indexing plate 7 are fixed, the rotating shaft indexing plate 7 can be rotated to a set angle, that is, the test head can be adjusted to a set angle. In this solution, the positioning holes 71 are evenly arranged along the circumferential direction of the rotating shaft indexing plate 7, and the positioning holes 71 are provided at the edge of the rotating shaft indexing plate 7, so as to fix the rotating shaft indexing plate 7 with minimal force; the first positioning assembly 11 can be a pin assembly or a rod assembly, which can be inserted into the positioning holes 71 to fix the rotating shaft indexing plate 7. A circular mounting plate 72 is provided on the side of the rotating shaft indexing plate 7 away from the third arm section 6 for installing the test head. The circular structure of the rotating shaft indexing plate 7 and the mounting plate 72 will not affect the installation of the second positioning assembly 12 when rotating, and can ensure smooth rotation.

[0025] Based on the above scheme, the first positioning assembly 11 includes a fixed block 111 and a first positioning pin 112. The fixed block 111 is fixed to the side of the third arm section 6. The first positioning pin 112 is screwed to the fixed block 111, so that the positioning pin 112 can be installed on the fixed block 111. By rotating the first positioning pin 112, the pin head of the first positioning pin 112 can be inserted into the positioning hole 71, and the first positioning pin 112 will not slip off.

[0026] Based on the above scheme, the pressure plate 122 is L-shaped, and is clamped on the edge of the shaft dividing disk 7. Since the shaft dividing disk 7 is a circular structure, it will not hinder the installation of the pressure plate 122; a pad 124 is provided between the pressure plate 122 and the fixed plate 121, and the pad 124 is arranged on the side of the shaft dividing disk 7 away from the pressure plate 122. Through the setting of the pad 124, when the second locking handle 123 of the second positioning assembly 12 is rotated, the pressure plate 122 can be pulled toward the shaft dividing disk 7, so that the two sides of the shaft dividing disk 7 are respectively squeezed by the pad 124 and the pressure plate 122, so that the shaft dividing disk 7 can be clamped to prevent the shaft dividing disk 7 from rotating, and the shaft dividing disk 7 can be fixed. At this time, the shaft dividing disk 7 can be rotated at any angle, that is, the test head can be rotated to any angle and fixed, so as to realize chip testing at special angles.

[0027] Based on the above scheme, at least one of the facing sides of the pad 124 and the pressure plate 122 has an anti-skid structure, that is, it can strengthen the friction between the pad 124 and the pressure plate 122 and the rotating shaft indexing plate 7, improve the firmness and stability of the rotating shaft indexing plate 7 when it is fixed, and ensure the accuracy of the test head on the chip test. Among them, the anti-skid structure can be a structure such as a frosted surface and an anti-skid layer set on the pad 124 and / or the pressure plate 122 to increase the friction between the pad 124 and / or the pressure plate 122 and the rotating shaft indexing plate 7.

[0028] In another embodiment of the present application, the locking member 9 includes a locking block 91 and a first locking handle 92. The locking block 91 is provided with a connecting shaft hole 911 and a locking hole 913. The connecting shaft hole 911 is connected to a slot 912 that passes through the locking block 91. The locking hole 913 passes through the locking block 91 and vertically intersects with the slot 912. The first locking handle 92 is connected in cooperation with the locking hole 913. The connection shaft 8 is fixed by the cooperation between the locking block 91 and the first locking handle 92. The locking and fixing of the connecting shaft 8 is achieved through the locking piece 9, wherein the connecting shaft hole 911 is used for the insertion of the connecting shaft 8, and the locking hole 913 is used for the installation of the first locking handle 92. The locking hole 913 is divided into two parts by the slot 912, one part is a smooth hole, and the other part is a screw hole. When the first locking handle 92 is rotated, the locking hole 913 divided into two parts can be gradually brought closer, thereby causing the connecting shaft hole 911 to deform and its hole area to gradually decrease, so that the hole wall of the connecting shaft hole 911 can lock the connecting shaft 8, thereby fixing the connecting shaft 8.

[0029] Based on the above scheme, at least one fault-tolerant groove 914 is provided on the locking block 91, and the fault-tolerant groove 914 is connected to the connecting shaft hole 911. Through the setting of the fault-tolerant groove 914, the difficulty of deformation of the connecting shaft hole 911 can be reduced, which facilitates the locking of the connecting shaft hole 911 to the connecting shaft 8; the cross section of the fault-tolerant groove 914 away from the connecting shaft hole 911 is wider than the cross section close to the connecting shaft hole 911, which can reduce the deformation difficulty of the fault-tolerant groove 914, and then indirectly reduce the deformation difficulty of the connecting shaft hole 911. In short, the design of the fault-tolerant groove 914 and its structure can reduce the deformation difficulty of the connecting shaft hole 911, and provide convenience for the connecting shaft hole 911 to clamp the connecting shaft 8.

[0030] In another scheme of the present application, two connecting seats 13 connected to the first arm 4 are provided on the lifting plate 3, and the connecting shaft 8 between the lifting plate 3 and the first arm 4 is rotatably installed between the two connecting seats 13. The setting of the connecting seat 13 facilitates the rotational connection between the lifting plate 3 and the first arm 4; the first arm 4 and the third arm 6 are connected to a connecting shaft 8 at the end close to the second arm 5, and the locking members 9 matched with the three connecting shafts 8 are respectively fixed on the connecting seat 13 and the two ends of the second arm 5. The second arm 5 is I-shaped, and the first arm 4 and the second arm 6 are respectively rotatably arranged in the I-shaped groove of the second arm 5, that is, when the second arm 5 rotates relative to the first arm 4 and the third arm 6 rotates relative to the second arm 5, the second arm 5 designed with the I-shaped structure can ensure the rotation of the second arm 5 and the third arm 6, so that they can rotate to the set angle, thereby effectively ensuring the range of motion and position of the manual mechanical arm, and ensuring that the test head connected thereto can meet the chip testing at different positions.

[0031] In the scheme of the present application, a linear guide rail and an accordion curtain 15 are connected between the lifting plate 3 and the column 2. The accordion curtain 15 is covered on the outer side of the linear guide rail. The two accordion curtains 15 are respectively arranged on the upper and lower sides of the lifting plate 3. The linear guide rail is used to facilitate the height adjustment of the lifting plate 3 on the column 2, thereby realizing the height adjustment of the connected test head. The design of the accordion curtain 15 can prevent dust and insects, ensure smooth height adjustment of the lifting plate 3, and at the same time improve the appearance and service life of the manual robotic arm. The two accordion curtains 15 ensure full coverage protection of the linear guide rail and other components installed on the column 2.

[0032] In another solution of the present application, a third positioning assembly 14 is provided on the lifting plate 3, and the lifting plate 3 is fixed by the third positioning assembly 14. The third positioning assembly 14 includes a second positioning pin 14, and a thread is provided in the middle of the second positioning pin 14 to be screwed to the lifting plate 3. The end of the second positioning pin 14 away from the pin head is vertically connected to a connecting rod 142, and both ends of the connecting rod 142 are respectively provided with a ball, that is, by rotating the connecting rod 142, the second positioning pin 14 can be driven to rotate relative to the lifting plate 3, so that the pin head of the second positioning pin 14 abuts against the column 2 or the linear guide on the column 2, and the lifting plate 3 is fixed to prevent the lifting plate 3 from sliding off, thereby fixing the lifting plate 3, and then fixing the test head connected to the manual mechanical arm.

[0033] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the invention content within the protection scope of the present invention.

Claims

1. A manual mechanical arm for chip testing capable of realizing multi-angle adjustment, comprising a base plate (1), a column (2) being provided on the base plate (1), a lifting plate (3) being connected to the column (2), a first section arm (4) being rotatably connected to the lifting plate (3), the first section arm (4) being rotatably connected to the second section arm (5), the second section arm (5) being rotatably connected to the third section arm (6), the third section arm (6) being connected to a rotating shaft indexing plate (7), a connecting shaft (8) and a locking member (9) being connected between the lifting plate (3) and the first section arm (4), the first section arm (4) and the second section arm (5), and the second section arm (5) and the third section arm (6), a rotating shaft (10) being inserted in the third section arm (6), the rotating shaft (10) being inserted in the center of the rotating shaft indexing plate (7) and being fixedly connected to the rotating shaft indexing plate (7), characterized in that: The third arm section (6) is provided with a first positioning assembly (11) and a second positioning assembly (12), the second positioning assembly (12) comprises a fixed plate (121), a side of the fixed plate (121) close to the rotating shaft indexing plate (7) is connected with a pressure plate (122), the fixed plate (121) and the pressure plate (122) are respectively arranged on two sides of the rotating shaft indexing plate (7), the fixed plate (121) is provided with a rotatably arranged second locking handle (123), and the locking end of the second locking handle (123) is screwed to the pressure plate (122).

2. The chip testing manual robot arm capable of realizing multi-angle adjustment according to claim 1, characterized in that: The rotating shaft indexing plate (7) is of a circular structure, a plurality of positioning holes (71) are provided on the rotating shaft indexing plate (7) along its circumferential direction, and a circular mounting plate (72) is provided on the side of the rotating shaft indexing plate (7) away from the third arm section (6).

3. The chip testing manual robot arm capable of realizing multi-angle adjustment according to claim 2, characterized in that: The first positioning assembly (11) comprises a fixing block (111) and a first positioning pin (112); the fixing block (111) is fixed to the side of the third arm section (6); the first positioning pin (112) is screwed onto the fixing block (111); the end of the first positioning pin (112) is a smooth rod and matches the positioning hole (71).

4. The chip testing manual robot arm capable of realizing multi-angle adjustment according to claim 2, characterized in that: The pressure plate (122) is L-shaped and is clamped on the edge of the rotating shaft indexing plate (7). A pad (124) is provided between the pressure plate (122) and the fixed plate (121). The pad (124) is arranged on the side of the rotating shaft indexing plate (7) away from the pressure plate (122).

5. The chip testing manual robot arm capable of realizing multi-angle adjustment according to claim 4, characterized in that: At least one of the facing sides of the pad (124) and the pressure plate (122) has an anti-slip structure.

6. The chip testing manual robot arm capable of realizing multi-angle adjustment according to claim 1, characterized in that: The locking member (9) comprises a locking block (91) and a first locking handle (92); the locking block (91) is provided with a connecting shaft hole (911) and a locking hole (913); the connecting shaft hole (911) is connected to a slot (912) penetrating the locking block (91); the locking hole (913) penetrates the locking block (91) and is perpendicularly intersected with the slot (912); the first locking handle (92) is cooperatively connected with the locking hole (913).

7. The chip testing manual robot arm capable of realizing multi-angle adjustment according to claim 6, characterized in that: The locking block (91) is provided with at least one fault-tolerant groove (914), the fault-tolerant groove (914) is connected to the connecting shaft hole (911), and the cross section of the fault-tolerant groove (914) at the end away from the connecting shaft hole (911) is wider than the cross section at the end close to the connecting shaft hole (911).

8. The chip testing manual robot arm capable of realizing multi-angle adjustment according to claim 1, characterized in that: The lifting plate (3) is provided with two connecting seats (13) connected to the first arm section (4); a connecting shaft (8) between the lifting plate (3) and the first arm section (4) is rotatably installed between the two connecting seats (13); the first arm section (4) and the third arm section (6) are each connected to a connecting shaft (8) at the end close to the second arm section (5); locking members (9) matched with the three connecting shafts (8) are respectively fixed on the connecting seat (13) and the two ends of the second arm section (5); the second arm section (5) is in an I-shaped shape; the first arm section (4) and the second arm section (6) are respectively rotatably arranged in the I-shaped groove of the second arm section (5).

9. The chip testing manual robot arm capable of realizing multi-angle adjustment according to claim 1, characterized in that: A linear guide rail and an accordion curtain (15) are connected between the lifting plate (3) and the column (2); the accordion curtain (15) is covered on the outside of the linear guide rail, and two accordion curtains (15) are respectively arranged on the upper and lower sides of the lifting plate (3).

10. The chip testing manual robot arm capable of realizing multi-angle adjustment according to claim 1, characterized in that: The lifting plate (3) is provided with a third positioning assembly (14), and the third positioning assembly (14) comprises a second positioning pin (14), the middle of which is provided with a thread that is screwed to the lifting plate (3), and the end of the second positioning pin (14) away from the pin head is vertically connected to a connecting rod (142), and both ends of the connecting rod (142) are respectively provided with balls.

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