Drilling and positioning fixture for manufacturing lift assembly housing

Abstract

The drilling positioning fixture used for manufacturing the housing of the lift assembly relates to the technical field of clamping and positioning fixtures, including a horizontal support plate, which is a square plate, and two longitudinally extending clamping limit rails are provided on both sides of the horizontal support plate, and the clamping limit rails are U-shaped rails with side openings; a laterally extending mobile connecting port is provided on the upper surface of the horizontal support plate, and a square mobile base is provided in the mobile connecting port, and a clamping and positioning frame is provided above the mobile base for lifting, and the clamping and positioning frame is a square frame with a side opening. The present invention solves the problems that the clamping fixture in the traditional technology is used in the process of double-sided drilling of the through deep hole of the lift housing, such as incomplete clamping and positioning, which may easily lead to drilling deviation, inconvenient loading and unloading and transportation of the lift housing, poor coordination between the clamping fixture and the drilling tool, and frequent disassembly and assembly when processing multiple hole positions.

Description

Technical Field

[0001] The invention relates to the technical field of clamping and positioning tooling, and in particular to a drilling and positioning tooling fixture used for manufacturing a lift assembly shell. Background Art

[0002] The lifter is a hydraulic device used to lift the plow on agricultural machinery. It is the most complex part of the hydraulic system of agricultural machinery. In principle, the lifter relies on the liquid pressure generated by oil to achieve the lifting action.

[0003] The agricultural machinery hydraulic lifter structurally includes an outer lift arm and an inner lift arm connected together by a lift arm shaft, and a piston rod hinged on the inner lift arm, wherein the piston rod is connected to the piston of a hydraulic cylinder, and the hydraulic cylinder is installed in a sealed lifter housing. The lifter housing contains hydraulic oil, and a reversing valve is fixedly installed on one side of the lifter housing. The two oil outlets on the reversing valve are respectively connected to the lifting oil inlet and the lowering oil inlet on the hydraulic cylinder, and the lower part of the lifter housing is connected to the oil inlet of the hydraulic pump through a pipeline.

[0004] From the production process, the processing of the lift includes casting, forging, stamping, mechanical finishing, welding, surface spraying and assembly of various parts. Among them, for the lift shell, its main processing technology includes forging, stamping, mechanical processing and assembly, and specifically for mechanical processing, it includes turning, milling, drilling, etc. Since the lift shell is essentially a square thin-walled shell, it is necessary to drill 8 through deep holes on the vertical wall of the shell. Combined with the existing production conditions and the deep hole structure characteristics of the lift shell, the processing plan adopted is: effectively decompose the deep hole processing, divide the deep hole processing into two processes, and drill from the two side end faces of the shell respectively. Although this avoids the problems of poor rigidity and easy deviation during processing, it is necessary to use a positioning fixture to ensure the coaxiality of the processing at both ends.

[0005] In summary, when drilling on both sides of the lifter housing to perform through-hole deep hole processing, the positioning accuracy of the clamping fixture is required to be high. Due to the large number of holes to be drilled, the following problems generally exist when the existing fixture is used to drill and clamp the lifter housing:

[0006] 1. The clamping positioning is not comprehensive, and the freedom of the lifter housing is insufficiently limited, which causes the lifter housing to be easily displaced during the drilling process, resulting in processing deviation.

[0007] 2. The problem of inconvenience in loading and unloading materials before and after drilling of the lift shell.

[0008] 3. Compared with single-side drilling, the clamping tool is more likely to block the feeding of the drilling tool during the drilling process on both sides of the lifter housing.

[0009] 4. Since the finished lifter shell has more than one through-hole, and the existing fixture has poor adjustability and the processing position of the drilling tool is relatively fixed, the lifter shell needs to be disassembled and re-clamped after each through-hole is processed, which is cumbersome and greatly reduces the processing efficiency.

[0010] In summary, the prior art obviously has inconveniences and defects in practical use, so it is necessary to improve it. Summary of the invention

[0011] In view of the defects in the prior art, the present invention provides a drilling positioning tooling fixture for the manufacture of the lifter assembly shell, so as to solve the problems of incomplete clamping positioning in the traditional technology used for the double-sided drilling of the through deep holes of the lifter shell, which may easily lead to drilling deviation, inconvenient loading and unloading and transportation of the lifter shell, poor coordination between the clamping fixture and the drilling tool, and frequent disassembly and assembly when processing multiple hole positions.

[0012] To achieve the above object, the present invention provides the following technical solutions:

[0013] A drilling positioning fixture for manufacturing a lift assembly shell comprises a horizontal support plate, wherein the horizontal support plate is a square plate, and two longitudinally extending clamping limit rails are arranged on both sides of the horizontal support plate, wherein the clamping limit rails are U-shaped rails with side openings.

[0014] As an optimized solution, a laterally extending movable connecting port is provided on the upper surface of the horizontal support plate, a square movable base is provided in the movable connecting port, a clamping and positioning frame is provided above the movable base for lifting and lowering, and the clamping and positioning frame is a square frame with a laterally opening.

[0015] As an optimized solution, a circular tool feed opening is respectively provided on each longitudinal outer end face of the clamping and positioning frame.

[0016] As an optimized solution, two laterally symmetrical conveying drive motors are fixedly connected to each longitudinal outer end face of the clamping and positioning frame, and the two conveying drive motors are arranged on both sides of the tool feed port. The output shaft end of each conveying drive motor passes through the side wall of the clamping and positioning frame and is fixedly connected to a horizontal conveying side roller. A support limit seat is respectively sleeved on the outer peripheral wall of each conveying side roller near the end, and the support limit seat is fixedly connected to the longitudinal inner wall of the clamping and positioning frame.

[0017] As an optimized solution, a lower conveyor belt is sleeved between the two laterally opposite conveying side rollers.

[0018] As an optimized solution, two symmetrical vertical mounting plates are laterally fixedly connected to the inner top surface of the clamping and positioning frame, two symmetrical center rollers are rotatably arranged between the two vertical mounting plates, two symmetrical stepper motors are respectively fixedly connected to the longitudinal outer wall of each of the vertical mounting plates, the stepper motors are arranged opposite to the center rollers, and the output shaft ends of the stepper motors respectively pass through the vertical mounting plates and are fixedly connected to the side end surfaces of the center rollers.

[0019] As an optimized solution, an upper conveyor belt is sleeved between the two central rollers.

[0020] As an optimized solution, a downward clamping frame is also provided on the inner top surface of the clamping and positioning frame, and the downward clamping frame is a U-shaped frame with an opening facing downward. The vertical part of the downward clamping frame is lifted and lowered between the vertical mounting plate and the upper conveyor belt.

[0021] As an optimized solution, a plurality of centrally symmetrical electrically controlled telescopic cylinders are fixedly connected to the inner top surface of the clamping and positioning frame, and the lower telescopic ends of the electrically controlled telescopic cylinders are fixedly connected to the upper surface of the downward clamping frame.

[0022] As an optimized solution, two symmetrical hydraulic telescopic cylinders are laterally fixedly connected to the inner bottom surface of the clamping and positioning frame, and the upper telescopic ends of the two hydraulic telescopic cylinders are fixedly connected with horizontal top support positioning plates. The top support positioning plates are laterally extending strip plates, and the top support positioning plates are arranged between the four conveying side rollers.

[0023] As an optimized solution, a displacement drive motor is fixedly connected to the lateral outer end surface of the horizontal support plate, and the output shaft end of the displacement drive motor extends into the movable communication port and is fixedly connected to a main transmission wheel.

[0024] As an optimized solution, two symmetrical threaded drive rods are rotatably provided in the mobile connecting port, the two threaded drive rods are laterally extended, and the two ends of each threaded drive rod are rotatably supported on the lateral inner wall of the mobile connecting port, and the two threaded drive rods respectively pass through and are threadedly connected to the mobile base.

[0025] As an optimized solution, an auxiliary transmission wheel is fixedly connected to the outer peripheral wall of each threaded driving rod near the end, and the two auxiliary transmission wheels are respectively abutted against the main transmission wheel for transmission.

[0026] As an optimized solution, four centrosymmetrical lifting and telescopic cylinders are fixedly connected to the upper surface of the movable base, and the upper telescopic end of each lifting and telescopic cylinder is respectively fixedly connected to the lower surface of the clamping and positioning frame.

[0027] As an optimized solution, four fixed clamping plates symmetrically connected in pairs are fixedly connected to each lateral outer end face of the horizontal support plate, the card-mounted limit rail is installed between two fixed clamping plates opposite to each other, and the upper surface of each of the upper fixed clamping plates is fixedly connected to a transmission drive motor, and the output shaft end of the transmission drive motor passes downward through the fixed clamping plate and is fixedly connected to a drive roller, and the outer peripheral surface of the drive roller is abutted against the inner groove surface of the card-mounted limit rail.

[0028] As an optimized solution, a lateral clamping plate is telescopically provided on each longitudinal inner wall of the clamping and positioning frame. The lateral clamping plate is tightly attached to the upper surface of the lower conveyor belt and is arranged opposite to the tool feed port. A positioning connecting port is respectively opened on each of the lateral clamping plates.

[0029] As an optimized solution, two symmetrical clamping telescopic cylinders are fixed on the longitudinal inner wall of the clamping and positioning frame corresponding to each of the lateral clamping plates, and the telescopic ends of the clamping telescopic cylinders are fixedly connected to the back side of the lateral clamping plates.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] The clamping and positioning mechanism provided in the present invention can fully limit multiple degrees of freedom of the lifter housing to prevent the lifter housing from being offset during the drilling process, thereby improving the drilling accuracy. Specifically, the clamping and positioning mechanism in the present invention includes a downward clamping frame, a top support positioning plate and a lateral clamping plate, and by controlling the hydraulic telescopic cylinder, the electric control telescopic cylinder and the clamping telescopic cylinder to shorten respectively, the downward clamping frame, the top support positioning plate and the lateral clamping plate are used to clamp and position the upper surface, the lower surface and the two side end faces of the lifter housing respectively.

[0032] The present invention provides an upper conveyor belt and a lower conveyor belt for conveying and transferring materials for loading and unloading of the lift shell. By starting the conveying drive motor, the conveying side rollers can be driven to rotate, thereby driving the lower conveyor belt to circulate and roll. By starting the stepping motor, the center roller can be driven to rotate, thereby driving the upper conveyor belt to circulate and roll. By cooperating with the upper conveyor belt and the lower conveyor belt, the lateral loading and unloading transfer of the lift shell can be realized.

[0033] The longitudinal outer end surface of the clamping and positioning frame in the present invention is provided with a tool feed port, and each lateral clamping plate is provided with a positioning communication port. The tool feed port and the positioning communication port can avoid the drilling tool during the drilling process.

[0034] The clamping and positioning frame provided in the present invention can, on the one hand, move laterally along the moving connecting port following the moving base under the control of the displacement driving motor, and on the other hand, move longitudinally along the two clamping limit rails following the horizontal support plate under the control of the transmission driving motor. At the same time, the height of the clamping and positioning frame can be adjusted by controlling the extension and retraction of the lifting and telescopic cylinder. Therefore, under the premise that the position of the drilling tool remains unchanged, the position of the clamping and positioning frame can be adjusted to realize the switching processing of multiple through deep holes, thereby realizing the one-time clamping of the lifter shell and the processing of multiple hole positions, thereby improving the drilling processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for the specific embodiments or the description of the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn according to the actual scale.

[0036] Figure 1 It is a schematic cross-sectional view of the internal structure of each component in the present invention in a top view direction;

[0037] Figure 2 It is a schematic cross-sectional view of the internal structure of each component in the present invention in the main viewing direction;

[0038] Figure 3 It is a schematic cross-sectional view of the internal structure of each component in the present invention in the side view direction;

[0039] Figure 4 It is a half-section schematic diagram of the internal structure of the conveying mechanism in the present invention in a top view;

[0040] Figure 5 It is a schematic diagram of the external overall structure of the present invention in the main viewing direction;

[0041] Figure 6 It is a schematic diagram of the external overall structure of the present invention in a top view;

[0042] Figure 7 It is a schematic diagram of the external overall structure of the present invention when viewed from the side.

[0043] In the figure: 1-horizontal support plate, 2-card-mounted limit rail, 3-movable connecting port, 4-movable base, 5-clamping positioning frame, 6-displacement drive motor, 7-main transmission wheel, 8-threaded drive rod, 9-secondary transmission wheel, 10-lifting telescopic cylinder, 11-fixed clamping plate, 12-transmission drive motor, 13-driving roller, 14-tool feed port, 15-conveying drive motor, 16-conveying side roller, 17-supporting limit seat, 18-lower conveyor belt, 19-vertical mounting plate, 20-center rotating roller, 21-stepping motor, 22-upper conveyor belt, 23-downward clamping frame, 24-electrically controlled telescopic cylinder, 25-hydraulic telescopic cylinder, 26-top support positioning plate, 27-lateral clamping plate, 28-positioning connecting port, 29-clamping telescopic cylinder. DETAILED DESCRIPTION

[0044] The following embodiments of the technical solution of the present invention are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and are therefore only used as examples, and cannot be used to limit the protection scope of the present invention.

[0045] like Figures 1 to 7 As shown, a drilling and positioning tooling fixture for manufacturing a lift assembly shell includes a horizontal support plate 1, which is a square plate. Two longitudinally extending clamping limit rails 2 are provided on both sides of the horizontal support plate 1, and the clamping limit rails 2 are U-shaped rails with side openings.

[0046] A transversely extending movable communication opening 3 is provided on the upper surface of the horizontal support plate 1. A square movable base 4 is provided in the movable communication opening 3. A clamping and positioning frame 5 is provided above the movable base 4 for lifting. The clamping and positioning frame 5 is a transversely opened square frame.

[0047] A displacement drive motor 6 is fixedly connected to the transverse outer end surface of the horizontal support plate 1 , and the output shaft end of the displacement drive motor 6 extends into the movable communication port 3 and is fixedly connected to a main transmission wheel 7 .

[0048] Two symmetrical threaded drive rods 8 are rotatably provided in the mobile connecting port 3. The two threaded drive rods 8 are extended laterally. Both ends of each threaded drive rod 8 are rotatably supported on the lateral inner wall of the mobile connecting port 3. The two threaded drive rods 8 pass through and are threadedly connected to the mobile base 4 respectively.

[0049] An auxiliary transmission wheel 9 is fixedly connected to the outer peripheral wall of each threaded driving rod 8 near the end, and the two auxiliary transmission wheels 9 are respectively abutted against the main transmission wheel 7 for transmission.

[0050] Four centrosymmetrical lifting and telescopic cylinders 10 are fixedly connected to the upper surface of the movable base 4 , and the upper telescopic end of each lifting and telescopic cylinder 10 is fixedly connected to the lower surface of the clamping and positioning frame 5 .

[0051] Four fixed clamping plates 11 symmetrically connected in pairs are fixedly connected to each lateral outer end face of the horizontal support plate 1. The clamping limit rail 2 is installed between two fixed clamping plates 11 opposite to each other. A transmission drive motor 12 is fixedly connected to the upper surface of each fixed clamping plate 11 located above. The output shaft end of the transmission drive motor 12 passes downward through the fixed clamping plate 11 and is fixedly connected to a drive roller 13. The outer peripheral surface of the drive roller 13 is against the inner groove surface of the clamping limit rail 2.

[0052] A circular tool feed opening 14 is respectively formed on each longitudinal outer end surface of the clamping and positioning frame 5 .

[0053] Two laterally symmetrical conveying drive motors 15 are fixedly connected to each longitudinal outer end face of the clamping and positioning frame 5. The two conveying drive motors 15 are arranged on both sides of the tool feed port 14. The output shaft end of each conveying drive motor 15 passes through the side wall of the clamping and positioning frame 5 and is fixedly connected to a horizontal conveying side roller 16. A support limit seat 17 is respectively sleeved on the outer peripheral wall near the end of each conveying side roller 16. The support limit seat 17 is fixedly connected to the longitudinal inner wall of the clamping and positioning frame 5.

[0054] A lower conveyor belt 18 is sleeved between two conveyor side rollers 16 that are laterally opposite to each other.

[0055] Two symmetrical vertical mounting plates 19 are laterally fixedly connected to the upper edge of the inner top surface of the clamping positioning frame 5, and two symmetrical center rollers 20 are rotatably arranged between the two vertical mounting plates 19. Two symmetrical stepper motors 21 are respectively fixedly connected to the longitudinal outer wall of each vertical mounting plate 19. The stepper motors 21 and the center rollers 20 are arranged opposite to each other, and the output shaft ends of the stepper motors 21 respectively pass through the vertical mounting plates 19 and are fixedly connected to the side end surfaces of the center rollers 20.

[0056] An upper conveyor belt 22 is sleeved between the two central rollers 20 .

[0057] A downward clamping frame 23 is also provided on the inner top surface of the clamping and positioning frame 5 for lifting and lowering. The downward clamping frame 23 is a U-shaped frame with its opening facing downward. The vertical part of the downward clamping frame 23 is lifted and lowered between the vertical mounting plate 19 and the upper conveyor belt 22.

[0058] A plurality of centrally symmetrical electric telescopic cylinders 24 are fixedly connected to the inner top surface of the clamping and positioning frame 5 , and the lower telescopic ends of the electric telescopic cylinders 24 are fixedly connected to the upper surface of the downward clamping frame 23 .

[0059] Two symmetrical hydraulic telescopic cylinders 25 are laterally fixedly connected to the upper edge of the inner bottom surface of the clamping positioning frame 5, and the upper telescopic ends of the two hydraulic telescopic cylinders 25 are fixedly connected with horizontal supporting positioning plates 26. The supporting positioning plates 26 are laterally extending strip plates, and the supporting positioning plates 26 are arranged between the four conveying side rollers 16.

[0060] A lateral clamping plate 27 is telescopically provided on each longitudinal inner wall of the clamping and positioning frame 5. The lateral clamping plate 27 is closely attached to the upper surface of the lower conveyor belt 18 and is arranged opposite to the tool feed port 14. A positioning communication port 28 is opened on each lateral clamping plate 27.

[0061] Two symmetrical clamping telescopic cylinders 29 are fixed on the longitudinal inner wall of the clamping and positioning frame 5 corresponding to each lateral clamping plate 27 , and the telescopic ends of the clamping telescopic cylinders 29 are fixed to the back side of the lateral clamping plate 27 .

[0062] When the present invention is used: first, the housing of the lifter assembly to be drilled is placed on the two lower conveyor belts 18 from the opening on one side of the clamping and positioning frame 5, and the four conveying drive motors 15 are started respectively. The conveying drive motors 15 drive the conveying side rollers 16 to rotate, and then drive the lower conveyor belt 18 to roll in a cycle, so as to transport the lifter housing horizontally; during the transportation process, the stepping motor 21 is started synchronously, and the stepping motor 21 drives the central rotating roller 20 to rotate, and drives the upper conveyor belt 22 to roll in a cycle, so as to realize auxiliary transfer; after the lifter housing is transferred to the clamping and positioning frame 5, control the hydraulic telescopic cylinder 25 to extend, drive the supporting positioning plate 26 to rise, and support and position the lower surface of the lifter shell. At the same time, control the electric telescopic cylinder 24 to extend, drive the pressing clamping frame 23 to descend, and press and clamp the upper surface of the lifter shell. Control the clamping telescopic cylinder 29 to extend, and drive the two lateral clamping plates 27 to move in opposite directions, clamp the longitudinal end surface of the lifter shell from both sides, so as to completely position the lifter shell to be processed; start the transmission drive motor 12 respectively, and the transmission drive motor 12 drives the drive The roller 13 rotates, thereby driving the horizontal support plate 1 to move back and forth longitudinally along the two clamping limit rails 2, so that the drilling tools located on both sides of the clamping positioning frame 5 pass through the tool feed port 14 and the positioning connecting port 28 respectively, thereby drilling the longitudinal end surface of the lifter shell on both sides; after one drilling is completed, the displacement drive motor 6 is started, and the displacement drive motor 6 drives the main transmission wheel 7 to rotate, thereby driving the auxiliary transmission wheel 9 and the threaded drive rod 8 to rotate, driving the mobile base 4 to move horizontally along the mobile connecting port 3, controlling the extension and retraction of the lifting and telescopic cylinder 10, and driving the clamping positioning The frame 5 is lifted as a whole, thereby adjusting the drilling position and height of the lifter shell; after all the holes on the lifter shell are processed, the hydraulic telescopic cylinder 25, the electric telescopic cylinder 24 and the clamping telescopic cylinder 29 are controlled to shorten respectively, so that the downward clamping frame 23, the supporting positioning plate 26 and the lateral clamping plate 27 release the clamping of the lifter shell, thereby transferring the lifter shell again between the lower conveyor belt 18 and the upper conveyor belt 22; the conveying drive motor 15 and the stepping motor 21 are started respectively to transport the processed lifter shell horizontally.

[0063] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents, and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention.

Claims

1. A drilling and positioning fixture for manufacturing a lift assembly housing, characterized in that: It comprises a horizontal support plate (1), the horizontal support plate (1) is a square plate, two sides of the horizontal support plate (1) are provided with two longitudinally extending clamping limit rails (2), the clamping limit rails (2) are U-shaped rails with side openings; The upper surface of the horizontal support plate (1) is provided with a transversely extending movable communication opening (3), a square movable base (4) is arranged in the movable communication opening (3), a clamping and positioning frame (5) is arranged on the upper side of the movable base (4) for lifting, and the clamping and positioning frame (5) is a square frame with a transverse opening; A circular tool feed opening (14) is respectively provided on each longitudinal outer end surface of the clamping and positioning frame (5); Two transversely symmetrical conveying drive motors (15) are respectively fixedly connected to each longitudinal outer end face of the clamping and positioning frame (5), and the two conveying drive motors (15) are respectively arranged on both sides of the tool feed port (14), and the output shaft end of each conveying drive motor (15) passes through the side wall of the clamping and positioning frame (5) and is fixedly connected to a horizontal conveying side roller (16), and a supporting limit seat (17) is respectively sleeved on the outer peripheral wall near the end of each conveying side roller (16), and the supporting limit seat (17) is fixedly connected to the longitudinal inner wall of the clamping and positioning frame (5); A lower conveyor belt (18) is sleeved between the two conveyor side rollers (16) that are laterally opposite to each other; Two symmetrical vertical mounting plates (19) are fixedly connected in a transverse direction to the inner top surface of the clamping and positioning frame (5); two symmetrical central rollers (20) are rotatably arranged between the two vertical mounting plates (19); two symmetrical stepping motors (21) are fixedly connected to the longitudinal outer wall of each vertical mounting plate (19); the stepping motors (21) and the central rollers (20) are arranged opposite to each other; the output shaft ends of the stepping motors (21) respectively pass through the vertical mounting plates (19) and are fixedly connected to the side end surfaces of the central rollers (20); An upper conveyor belt (22) is sleeved between the two central rollers (20); A downward clamping frame (23) is also provided on the inner top surface of the clamping and positioning frame (5) and is capable of being lifted and lowered. The downward clamping frame (23) is a U-shaped frame with its opening facing downward, and the vertical portion of the downward clamping frame (23) is lifted and lowered between the vertical mounting plate (19) and the upper conveyor belt (22); A plurality of centrally symmetrical electrically controlled telescopic cylinders (24) are fixedly connected to the inner top surface of the clamping and positioning frame (5), and the lower telescopic ends of the electrically controlled telescopic cylinders (24) are fixedly connected to the upper surface of the downward clamping frame (23); Two symmetrical hydraulic telescopic cylinders (25) are fixedly connected laterally to the inner bottom surface of the clamping and positioning frame (5); the upper telescopic ends of the two hydraulic telescopic cylinders (25) are fixedly connected to horizontal supporting and positioning plates (26); the supporting and positioning plates (26) are strip-shaped plates extending laterally; and the supporting and positioning plates (26) are arranged between the four conveying side rollers (16); A lateral clamping plate (27) is telescopically provided on each longitudinal inner wall of the clamping and positioning frame (5), the lateral clamping plate (27) is closely attached to the upper surface of the lower conveyor belt (18) and is arranged opposite to the tool feed port (14), and a positioning communication port (28) is provided on each lateral clamping plate (27).

2. The drilling and positioning fixture for manufacturing the lift assembly housing according to claim 1 is characterized in that: A displacement drive motor (6) is fixedly connected to the transverse outer end surface of the horizontal support plate (1), and the output shaft end of the displacement drive motor (6) extends into the movable communication port (3) and is fixedly connected to a main transmission wheel (7).

3. The drilling and positioning fixture for manufacturing the lift assembly housing according to claim 2 is characterized in that: Two symmetrical threaded drive rods (8) are rotatably arranged in the movable communication port (3), the two threaded drive rods (8) are extended transversely, and the two ends of each threaded drive rod (8) are rotatably supported on the transverse inner wall of the movable communication port (3), and the two threaded drive rods (8) respectively pass through and are threadedly connected to the movable base (4).

4. The drilling and positioning fixture for manufacturing the lift assembly housing according to claim 3 is characterized in that: An auxiliary transmission wheel (9) is fixedly connected to the outer peripheral wall of each threaded driving rod (8) near the end, and the two auxiliary transmission wheels (9) are respectively abutted against the main transmission wheel (7) for transmission.

5. The drilling and positioning fixture for manufacturing the lift assembly housing according to claim 1 is characterized in that: Four centrally symmetrical lifting and telescopic cylinders (10) are fixedly connected to the upper surface of the movable base (4), and the upper telescopic end of each lifting and telescopic cylinder (10) is respectively fixedly connected to the lower surface of the clamping and positioning frame (5).

6. The drilling and positioning fixture for manufacturing the lift assembly housing according to claim 1 is characterized in that: Four fixed clamping plates (11) are fixedly connected to each lateral outer end surface of the horizontal support plate (1), and are symmetrical in pairs. The clamping limit rail (2) is installed between two fixed clamping plates (11) that are opposite to each other in an upper and lower direction. A transmission drive motor (12) is fixedly connected to the upper surface of each fixed clamping plate (11) located at the top. The output shaft end of the transmission drive motor (12) passes downward through the fixed clamping plate (11) and is fixedly connected to a drive roller (13). The outer peripheral surface of the drive roller (13) abuts against the inner groove surface of the clamping limit rail (2).

7. The drilling and positioning fixture for manufacturing the lift assembly housing according to claim 1 is characterized in that: Two symmetrical clamping telescopic cylinders (29) are fixed on the longitudinal inner wall of the clamping positioning frame (5) corresponding to each of the lateral clamping plates (27), and the telescopic ends of the clamping telescopic cylinders (29) are fixedly connected to the back side of the lateral clamping plates (27).

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