Lifter guide rail support shaft penetrating and height adjusting screw positioning and tightening automatic equipment

Abstract

The utility model discloses a lifter guide rail support shaft penetrating and height adjusting screw positioning and tightening automatic device which comprises a device platform. The bracket penetrating shaft and short screw tightening and positioning mechanism is fixed on one side of the equipment platform and is used for tightening and positioning a guide rail bracket penetrating shaft and a short screw; the long screw tightening and positioning mechanism is fixed on the other side of the equipment platform and is used for tightening and positioning a guide rail long screw; the guide rail tool positioning and nut end positioning mechanism is fixed on the equipment platform and is used for fixedly positioning two ends of the guide rail and ensuring that a screw is aligned with a guide rail nut hole; and shaft penetrating and screw tightening positioning of the guide rail bracket, guide rail positioning and long screw tightening positioning are realized. According to the utility model, the production efficiency is improved, the automation degree is improved, the product quality is improved, and in addition, the cost for developing equipment in the early stage and the maintenance cost for equipment in the later stage are greatly reduced.

Description

Technical Field

[0001] The invention relates to the technical field of automobile glass lifter production, and in particular to an automatic device for threading axles of guide rail brackets of lifters and for positioning and tightening height-adjusting screws. Background Art

[0002] The existing lifter sub-assembly guide rail bracket shaft and adjustment screw positioning and tightening mainly use manual loading, cylinder shaft, different height adjustment blocks, positioning screw position, use brand screw gun, screw in and reach the torque after reverse a certain angle, convenient limit block return, complete the processing.

[0003] There are currently the following issues:

[0004] 1. The failure rate of the shaft-through mechanism is high, the damage rate of the follower bearing is high, and it takes a long time to disassemble the mechanism for maintenance;

[0005] 2. The position of the bracket lifting mechanism is easily offset, resulting in the bracket and the pre-pierced shaft space not being aligned, causing the shaft to not be inserted in place;

[0006] 3. There are many specifications of height adjustment screws and height adjustment blocks, which cannot be error-proofed and are prone to installation errors;

[0007] 4. The minimum thickness of the height adjustment block is only 1mm, which makes the height adjustment block very easy to be damaged, and the subsequent maintenance costs are increased;

[0008] 5. Error prevention of long and short screws, using a bracket to lift the cylinder to extend the signal and program interlocking, unstable, resulting in defective parts;

[0009] 6. When workers hold screw guns for a whole day, the labor intensity is high;

[0010] 7. Branded screw guns are expensive. Summary of the invention

[0011] Purpose of the invention: In order to overcome the shortcomings of the background technology, the present invention discloses an automatic device for threading the shaft of a guide rail bracket of a lifter and for positioning and tightening the height-adjusting screws.

[0012] Technical solution: The utility model discloses an automatic device for threading the shaft of the guide rail bracket of the lifter and positioning and tightening the height-adjusting screws, including:

[0013] Device platform;

[0014] The bracket shaft insertion and short screw tightening positioning mechanism is fixed on one side of the equipment platform and is used for the guide rail bracket shaft insertion and short screw tightening positioning;

[0015] The long screw tightening and positioning mechanism is fixed on the other side of the equipment platform and is used for tightening and positioning the long screws of the guide rail;

[0016] The guide rail fixture positioning and nut end positioning mechanism are fixed on the equipment platform and are used to fix and position both ends of the guide rail to ensure that the screws and the guide rail nut holes are aligned;

[0017] Together they form the guide rail bracket through the shaft, the short screws tightening the positioning, the guide rail positioning, and the long screws tightening the positioning.

[0018] Furthermore, the bracket shaft-penetrating and short screw tightening positioning mechanism comprises a bracket shaft-penetrating mechanism, a servo positioning and tightening system, a column and a main back plate;

[0019] The support shaft-threading mechanism is fixed on the equipment platform;

[0020] The servo positioning and tightening system is connected and fixed on the equipment platform through a column and a main back plate.

[0021] Further, the support shaft threading mechanism includes a translation cylinder, a pressing cylinder, a shaft threading cylinder, a shaft threading push rod, a shaft tooling, a support tooling, a support extension mechanism, a pre-threaded shaft rod, a cylinder mechanical connector and a pre-threaded shaft cylinder;

[0022] The translation cylinder is installed on the equipment platform and extends above the workpiece during operation. The clamping cylinder is fixed at the front end of the translation cylinder. When the translation cylinder is extended, the clamping cylinder is extended and aligned with the bracket extension mechanism in the vertical direction; the shaft-penetrating cylinder and the shaft-penetrating push rod are connected and fixed by the cylinder mechanical connector, the shaft tooling is fixed on the equipment platform and is level with the shaft-penetrating push rod, the bracket tooling is connected to the bracket extension mechanism and installed on the left side of the shaft tooling, the pre-penetrating shaft rod and the pre-penetrating shaft cylinder are fixedly connected by screws and fixed on the left side of the bracket tooling, the shaft-penetrating cylinder and the shaft-penetrating push rod, the shaft tooling, the bracket tooling and the pre-penetrating shaft cylinder are aligned through mechanical adjustment so that the pre-penetrating shaft rod and the shaft-penetrating push rod are kept on the same center line; the pre-penetrating shaft cylinder drives the pre-penetrating shaft rod to extend and enter the bracket and guide rail holes. After it is in place, the shaft-penetrating cylinder drives the shaft-penetrating push rod to press the shaft in the shaft tooling into the bracket hole, and press the pre-penetrating shaft rod back into place together, so as to realize the function of the bracket shaft-penetrating.

[0023] Furthermore, the support extension mechanism includes a support extension cylinder and a support clamping block. The support extension cylinder is connected to the support clamping block. The former drives the latter to move vertically. The support extension cylinder extends to push the support into the guide rail.

[0024] Furthermore, the servo positioning tightening system includes a pressing cylinder, a servo motor, a reducer, a coupling, a tightening shaft, a displacement control mechanism, a screwdriver connector, a screwdriver cylinder, an elastic pressure plate, a screwdriver, a screw positioning and holding mechanism, a servo motor connecting plate, a clamping connecting plate, a linear guide rail, and a back plate;

[0025] The displacement control mechanism includes a displacement sensor, a displacement measuring tooling plate, and a spring;

[0026] The screw positioning and holding mechanism comprises a magnet, a guide rail pressure plate, and a screw positioning tool;

[0027] The servo positioning tightening system is installed on the main back plate, the main back plate is installed on the column, the column is fixed on the equipment platform, the downward pressure cylinder is connected to the clamping connecting plate, the screwdriver head cylinder is fixed on the clamping connecting plate, and is connected to the servo motor connecting plate. The servo motor is fixed on the servo motor connecting plate. The servo motor is connected to the reducer, and the tightening shaft is connected to it by a coupling. The screwdriver head connector is hard-connected to the tightening shaft, the screwdriver head is installed at the front, and is concentric with the nut end of the workpiece in the vertical direction; the displacement control mechanism is installed on the elastic pressure plate, the displacement sensor is fixed on the displacement measurement tooling plate, the displacement measurement tooling plate is fixed on the elastic pressure plate, and the spring presses the elastic pressure plate to ensure that the displacement sensor is in the initial position The screw positioning and holding mechanism is fixed on the displacement measurement tooling plate and moves synchronously with the displacement measurement tooling plate to ensure the accurate displacement of the displacement sensor. The magnet is installed on the wall of the screw positioning tooling to adsorb the screw. The screw is manually placed inside the tooling and the screw is automatically adsorbed to the tooling surface. The downward pressure cylinder drives the clamping connecting plate to move downward and descend to the bracket plane. After the guide rail is clamped, the short screw falls into the bracket hole and the servo motor starts to start. As the screw is screwed in, the displacement control mechanism runs downward together. When the set position parameter is reached, the servo motor stops immediately, and the screw head withdrawal cylinder drives the screw head to move upward and withdraw from the screw hole. The downward pressure cylinder drives the servo positioning and tightening system to move upward and return to its original position.

[0028] Furthermore, the long screw tightening and positioning mechanism has the same structure as the servo positioning and tightening system, and realizes the long screw positioning and tightening function together with the guide rail tooling positioning and nut end positioning mechanism;

[0029] The guide rail tooling positioning and nut end positioning mechanism includes a guide rail nut end positioning and a guide rail tooling positioning, and works in conjunction with a long screw tightening positioning mechanism.

[0030] Beneficial effects: Compared with the prior art, the advantages of the utility model are: improved production efficiency, improved automation, improved product quality, and greatly reduced the cost of early equipment development and maintenance costs of later equipment;

[0031] Specifically:

[0032] Productivity: low equipment failure rate, good stability and high output;

[0033] Operation: The operation is simple and greatly reduces the labor intensity of workers;

[0034] Cost: Compared with the price of screw guns, the price of servos is about 70%-80% lower;

[0035] Control accuracy: The product stops by servo positioning, has good consistency, and does not require reversal, ensuring that the screw thread glue does not fall off;

[0036] Efficiency: The cycle time for single-sided short screw driving is 10 seconds, and the cycle time for long screw driving is 7 seconds. The two can be performed simultaneously. Compared with the previous manual system, the cycle time can be effectively reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0038] Figure 2 This is a schematic diagram of the structure of the bracket through-shaft and short screw tightening positioning mechanism of the utility model;

[0039] Figure 3 This is a schematic diagram of the structure of the shaft-threading mechanism of the bracket of the utility model;

[0040] Figure 4 This is a schematic diagram of the structure of the support extension mechanism of the utility model;

[0041] Figure 5 This is a schematic diagram of the structure of the servo positioning tightening system of the utility model;

[0042] Figure 6 It is a structural schematic diagram of the displacement control mechanism of the utility model;

[0043] Figure 7 This is a schematic diagram of the structure of the screw positioning and holding mechanism of the utility model;

[0044] Figure 8 This is a schematic diagram of the structure of the nut end positioning mechanism of the utility model;

[0045] Fig. 9 It is a schematic diagram of the positioning structure of the guide rail tooling of the utility model. DETAILED DESCRIPTION

[0046] The technical solution of the utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0047] like Figure 1-9 The automatic device for threading the shaft of the guide rail bracket of the lifter and positioning and tightening the height adjustment screws shown includes:

[0048] Device platform 1;

[0049] The bracket shaft threading and short screw tightening positioning mechanism 2 is fixed to one side of the equipment platform 1 and is used for the guide rail bracket shaft threading and short screw tightening positioning;

[0050] The long screw tightening and positioning mechanism 3 is fixed to the other side of the equipment platform 1 and is used for tightening and positioning the long screws of the guide rail;

[0051] The guide rail fixture positioning and nut end positioning mechanism 4 is fixed on the equipment platform 1 and is used for fixing and positioning the two ends of the guide rail to ensure that the screw and the guide rail nut hole are aligned;

[0052] Together they form the guide rail bracket through the shaft, the short screws tightening the positioning, the guide rail positioning, and the long screws tightening the positioning.

[0053] The bracket shaft-threading and short screw tightening positioning mechanism 2 comprises a bracket shaft-threading mechanism 2.1, a servo positioning and tightening system 2.2, a column 2.3 and a main back plate 2.4;

[0054] The support shaft threading mechanism 2.1 is fixed on the equipment platform 1;

[0055] The servo positioning and tightening system 2.2 is connected and fixed on the equipment platform 1 through the column 2.3 and the main back plate 2.4.

[0056] The support shaft threading mechanism 2.1 includes a translation cylinder 2.1.9, a pressing cylinder 2.1.2, a shaft threading cylinder 2.1.1, a shaft threading push rod 2.1.6, a shaft tooling 2.1.7, a support tooling 2.1.10, a support extension mechanism 2.1.3, a pre-threaded shaft rod 2.1.8, a cylinder mechanical connector 2.1.5 and a pre-threaded shaft cylinder 2.1.4;

[0057] The translation cylinder 2.1.9 is installed on the equipment platform 1 and extends above the workpiece during operation. The clamping cylinder 2.1.2 is fixed at the front end of the translation cylinder 2.1.9. When the translation cylinder is extended, the clamping cylinder 2.1.2 is extended and aligned with the bracket extension mechanism 2.1.3 in the vertical direction. The shaft-piercing cylinder 2.1.1 and the shaft-piercing push rod 2.1.6 are connected and fixed by the cylinder mechanical connector 2.1.5. The shaft fixture 2.1.7 is fixed on the equipment platform 1 and is kept in line with the shaft-piercing push rod 2.1.6. The bracket fixture 2.1.10 is connected to the bracket extension mechanism 2.1.3 and installed on the left side of the shaft fixture 2.1.7. The pre-piercing shaft rod 2.1.8 and the pre-piercing shaft cylinder 2.1.4 is fixedly connected by screws and fixed on the left side of the bracket tooling 2.1.10. The shaft-threading cylinder 2.1.1 and the shaft-threading push rod 2.1.6, the shaft tooling 2.1.7, the bracket tooling 2.1.10 and the pre-threading cylinder 2.1.4 are aligned through mechanical adjustment to keep the pre-threading shaft rod 2.1.8 and the shaft-threading push rod 2.1.6 on the same center line; the pre-threading cylinder 2.1.4 drives the pre-threading shaft rod 2.1.8 to extend and enter the bracket and guide rail holes. After it is in place, the shaft-threading cylinder 2.1.1 drives the shaft-threading push rod 2.1.6 to press the shaft in the shaft tooling 2.1.7 into the bracket hole, and press the pre-threading shaft rod 2.1.8 back into place together, thereby realizing the function of the bracket threading shaft.

[0058] The translation cylinder 2.1.9 realizes the avoidance effect with the short screw tightening positioning mechanism, the clamping cylinder 2.1.2 realizes the guide rail clamping and positioning function, the shaft penetration cylinder 2.1.1 realizes the power function of pressing the shaft, the shaft penetration push rod 2.1.6 is used to realize the positioning function of the shaft, the shaft tooling 2.1.7 realizes the area for shaft placement, the bracket tooling 2.1.10 realizes the area function for bracket placement, the bracket extension mechanism 2.1.3 realizes the function of pressing the bracket into the guide rail, the pre-penetration shaft rod 2.1.8 realizes the positioning function of the bracket and the guide rail, and the pre-penetration shaft cylinder 2.1.4 realizes the power function of providing pre-penetration shaft rod action.

[0059] The support extension mechanism 2.1.3 includes a support extension cylinder 2.1.3.2 and a support clamping block 2.1.3.1. The support extension cylinder 2.1.3.2 is connected to the support clamping block 2.1.3.1. The former drives the latter to move vertically. The support extension cylinder 2.1.3.2 extends to push the support into the guide rail.

[0060] The support extension cylinder 2.1.3.2 is used to realize the function of pressing the support into the guide rail; the support clamping block 2.1.3.1 is used to realize the function of positioning the support.

[0061] The solenoid valve of the pre-through-shaft cylinder needs to use a mid-drain valve, which can be active when the solenoid valve is not powered, ensuring that the through-shaft cylinder will push the pre-through-shaft cylinder back to the position. There is a sensor at this position as an error prevention to ensure that there is no possibility of missing shafts. If there is no shaft, the through-shaft cylinder cannot push the pre-through-shaft cylinder to the position of the sensor, and the device will alarm.

[0062] The servo positioning tightening system 2.2 includes a downward pressure cylinder 2.2.1, a servo motor 2.2.2, a reducer 2.2.3, a coupling 2.2.4, a tightening shaft 2.2.5, a displacement control mechanism 2.2.6, a screwdriver bit connector 2.2.7, a screwdriver bit retracting cylinder 2.2.8, an elastic pressure plate 2.2.9, a screwdriver bit 2.2.10, a screw positioning holding mechanism 2.2.11, a servo motor connecting plate 2.2.12, a clamping connecting plate 2.2.13, a linear guide rail 2.2.14, and a back plate 2.2.15;

[0063] The displacement control mechanism 2.2.6 comprises a displacement sensor 2.2.6.1, a displacement measuring tooling plate 2.2.6.2, and a spring 2.2.6.3;

[0064] The screw positioning and holding mechanism 2.2.11 comprises a magnet 2.2.11.1, a guide rail pressure plate 2.2.11.2, and a screw positioning tool 2.2.11.3;

[0065] The servo positioning tightening system 2.2 is installed on the main back plate 2.4, the main back plate 2.4 is installed on the column 2.3, the column 2.3 is fixed on the equipment platform 1, the downward pressure cylinder 2.2.1 is connected to the clamping connecting plate 2.2.13, the screw head cylinder 2.2.8 is fixed on the clamping connecting plate 2.2.13, and is connected to the servo motor connecting plate 2.2.12, the servo motor is fixed on the servo motor connecting plate 2.2.12, the servo motor 2.2.2 is connected to the reducer 2.2.3, and the coupling 2.2.4 is used to tighten the screw. The tightening shaft 2.2.5 is connected with it, the screwdriver bit connector 2.2.7 is hard-connected to the tightening shaft 2.2.5, the screwdriver bit 2.2.10 is installed at the front and is concentric with the nut end of the workpiece in the vertical direction; the displacement control mechanism 2.2.6 is installed on the elastic pressure plate 2.2.9, the displacement sensor 2.2.6.1 is fixed on the displacement measurement fixture plate 2.2.6.2, the displacement measurement fixture plate 2.2.6.2 is fixed on the elastic pressure plate 2.2.9, and the spring 2.2.6.3 presses the elastic pressure plate 2.2.9 to ensure Keep the displacement sensor 2.2.6.1 in the initial position, the screw positioning and holding mechanism 2.2.11 is fixed on the displacement measuring fixture plate 2.2.6.2, and moves synchronously with the displacement measuring fixture plate 2.2.6.2 to ensure the displacement of the displacement sensor 2.2.6.1 is accurate, the magnet 2.2.11.1 is installed on the wall of the screw positioning fixture 2.2.11.3, adsorbs the screw, manually places the screw inside the fixture, the screw is automatically adsorbed to the fixture surface, and the downward pressure cylinder 2.2.1 drives the compression connecting plate 2.213 downward The servo motor 2.2.2 starts to start, and as the screw is screwed in, the displacement control mechanism 2.2.6 moves downward. When the set position parameter is reached, the servo motor 2.2.2 stops immediately, and the screw head retracting cylinder 2.2.8 drives the screw head 2.2.10 to move upward and withdraw from the screw hole. The downward pressure cylinder 2.2.1 drives the servo positioning and tightening system 2.2 to move upward and return to its original position. The above mechanism is used to realize the function of screw positioning and tightening.

[0066] The downward pressure cylinder 2.2.1 is used to realize the descending function of the servo positioning tightening mechanism, the servo motor 2.2.2, the reducer 2.2.3, the coupling 2.2.4 and the tightening shaft 2.2.5 are used to realize the hardware composition of the servo positioning system, the displacement control mechanism 2.2.6 is used to measure the control function of the movement of the screwdriver bit, the screwdriver bit connector 2.2.7 is used to realize the connection function with the screwdriver bit, the screwdriver bit retracting cylinder 2.2.8 is used to prevent the screw from being lifted up, the elastic pressure plate 2.2.9 is used to realize the return function of the displacement sensor, the screwdriver bit 2.2.10 is used to realize the connection with the screw, the screw positioning and holding mechanism 2.2.11 is used to realize the automatic adsorption function of the screw, the servo motor connecting plate 2.2.12, the clamping connecting plate 2.2.13, the linear guide 2.2.14 and the back plate 2.2.15 components are used for connection and fixing.

[0067] The displacement sensor 2.2.6.1 is used to realize position measurement, the displacement measurement fixture plate 2.2.6.2 is used to realize the connection function with the displacement sensor, and the spring 2.2.6.3 is used to realize the return function of the displacement sensor, so as to realize the displacement acquisition control function as a whole.

[0068] The magnet 2.2.11.1 is used to realize the function of adsorbing the screws and preventing them from falling, the guide rail pressure plate 2.2.11.2 is used to realize the function of clamping the guide rail and fixing it, and the screw positioning tooling 2.2.11.3 is used for the screw placement area function to realize the function of positioning the screws and preventing them from falling.

[0069] Different types of guide rails in this process have different height adjustment screw positions, which are set in the program recipe function, and the required screw-in height is switched by changing the type. Error prevention function: 1. Error prevention of long and short screws. If long screws are used by mistake, the initial position of the displacement sensor will not be within the normal range, and the equipment will alarm to prompt employees. 2. The screw is not screwed into the screw hole. Within 2 seconds, the displacement sensor does not produce a displacement change. The equipment thinks that it is not screwed in, and the equipment alarms. 3. The screw is screwed in to the bottom, fits against the guide rail surface or is tightened and does not move. If it is in the normal area, the servo speed is 0, and the equipment thinks that it is screwed in too low or not in place. The equipment alarms to prevent defective parts from flowing out.

[0070] The long screw tightening and positioning mechanism 3 has the same structure as the servo positioning and tightening system 2.2, and together with the guide rail fixture positioning and nut end positioning mechanism 4 realizes the long screw positioning and tightening function;

[0071] The guide rail fixture positioning and nut end positioning mechanism 4 includes a guide rail nut end positioning 4.1 and a guide rail fixture positioning 4.2, which cooperate with the long screw tightening positioning mechanism 3 to work.

[0072] The design of this mechanism is the same as the short screw tightening positioning mechanism, so it will not be described in detail. The guide rail nut end positioning 4.1 is used to realize the guide rail nut end positioning function, and the guide rail fixture positioning 4.2 is used to realize the limiting function of different types of guide rail positions to prevent the guide rails from swinging. Different types of guide rails can be quickly switched according to the model. The guide rail fixture positioning 4.2 is fixed to the equipment platform 1 by pins, and different guide rail fixtures are designed through profiling to ensure the stability of the guide rail placement. The guide rail nut end positioning 4.1 is fixed to the equipment platform 1 by profiling positioning to keep the horizontal and vertical directions of the tightening and screwing in stable. The above mechanisms jointly complete the function of long screw positioning and tightening.

[0073] In actual operation, the first step is to place the guide rail on the bracket shaft and screw tightening mechanism 2 on the left, and first process the bracket and short screws. The second step is to place the guide rail of the first step into the guide rail tooling positioning and nut end positioning mechanism 4. The third step is to tighten and position the long screws with the long screw tightening positioning mechanism 3 on the right to complete all the processes.

Claims

1. An automatic device for threading the shaft of the guide rail bracket of a lifter and positioning and tightening the height-adjusting screws, characterized in that: include: Device Platform (1); The bracket shaft threading and short screw tightening positioning mechanism (2) is fixed to one side of the equipment platform (1) and is used for the guide rail bracket shaft threading and short screw tightening positioning; A long screw tightening and positioning mechanism (3) is fixed to the other side of the equipment platform (1) and is used for tightening and positioning the long screws of the guide rail; The guide rail fixture positioning and nut end positioning mechanism (4) is fixed on the equipment platform (1) and is used to fix and position the two ends of the guide rail to ensure that the screw and the guide rail nut hole are aligned; Together they form the guide rail bracket through the shaft, the short screws tightening the positioning, the guide rail positioning, and the long screws tightening the positioning.

2. The automatic device for threading the shaft of the guide rail bracket and positioning and tightening the height-adjusting screws of the lifter according to claim 1 is characterized by: The bracket shaft-penetrating and short screw tightening positioning mechanism (2) comprises a bracket shaft-penetrating mechanism (2.1), a servo positioning tightening system (2.2), a column (2.3) and a main back plate (2.4); The support shaft threading mechanism (2.1) is fixed on the equipment platform (1); The servo positioning tightening system (2.2) is connected and fixed on the equipment platform (1) via a column (2.3) and a main back plate (2.4).

3. The automatic device for threading the shaft and positioning and tightening the height-adjusting screws of the guide rail bracket of the lifter according to claim 2 is characterized by: The support shaft threading mechanism (2.1) comprises a translation cylinder (2.1.9), a pressing cylinder (2.1.2), a shaft threading cylinder (2.1.1), a shaft threading push rod (2.1.6), a shaft tooling (2.1.7), a support tooling (2.1.10), a support extension mechanism (2.1.3), a pre-threaded shaft rod (2.1.8), a cylinder mechanical connector (2.1.5) and a pre-threaded shaft cylinder (2.1.4); The translation cylinder (2.1.9) is installed on the equipment platform (1) and extends above the workpiece during operation. The clamping cylinder (2.1.2) is fixed to the front end of the translation cylinder (2.1.9). When the translation cylinder is extended, the clamping cylinder (2.1.2) is extended and aligned with the support extension mechanism (2.1.3) in the vertical direction. The shaft-piercing cylinder (2.1.1) and the shaft-piercing push rod (2.1.6) are connected and fixed by the cylinder mechanical connector (2.1.5). The shaft fixture (2.1.7) is fixed on the equipment platform (1) and is aligned with the shaft-piercing push rod (2.1.6) in a horizontal direction. The support fixture (2.1.10) is connected to the support extension mechanism (2.1.3) and installed on the left side of the shaft fixture (2.1.7). The pre-pierced shaft rod (2.1.8) and the pre-pierced shaft cylinder (2.1.9) are connected to the support extension mechanism (2.1.3). The cylinder (2.1.4) is connected by screws and fixed on the left side of the bracket fixture (2.1.10). The shaft-threading cylinder (2.1.1) and the shaft-threading push rod (2.1.6), the shaft fixture (2.1.7), the bracket fixture (2.1.10) and the pre-threading cylinder (2.1.4) are aligned through mechanical adjustment so that the pre-threading shaft rod (2.1.8) and the shaft-threading push rod (2.1.6) are kept on the same center line; the pre-threading cylinder (2.1.4) drives the pre-threading shaft rod (2.1.8) to extend and enter the bracket and the guide rail hole. After it is in place, the shaft-threading cylinder (2.1.1) drives the shaft-threading push rod (2.1.6) to press the shaft in the shaft fixture (2.1.7) into the bracket hole, and press the pre-threading shaft rod (2.1.8) back into place together, thereby realizing the function of the bracket threading shaft.

4. The automatic device for threading the shaft of the guide rail bracket of the lifter and positioning and tightening the height-adjusting screws according to claim 3 is characterized by: The support extension mechanism (2.1.3) comprises a support extension cylinder (2.1.3.2) and a support pressing block (2.1.3.1). The support extension cylinder (2.1.3.2) is connected to the support pressing block (2.1.3.1). The former drives the latter to move vertically. 2.1.3.2) Stretch out and push the bracket into the guide rail.

5. The automatic device for threading the shaft of the guide rail bracket of the lifter and positioning and tightening the height-adjusting screws according to claim 4 is characterized by: The servo positioning tightening system (2.2) comprises a downward pressure cylinder (2.2.1), a servo motor (2.2.2), a reducer (2.2.3), a coupling (2.2.4), a tightening shaft (2.2.5), a displacement control mechanism (2.2.6), a screwdriver bit connector (2.2.7), a screwdriver bit retracting cylinder (2.2.8), an elastic pressure plate (2.2.9), a screwdriver bit (2.2.10), a screw positioning holding mechanism (2.2.11), a servo motor connecting plate (2.2.12), a clamping connecting plate (2.2.13), a linear guide rail (2.2.14), and a back plate (2.2.15); The displacement control mechanism (2.2.6) comprises a displacement sensor (2.2.6.1), a displacement measuring tooling plate (2.2.6.2), and a spring (2.2.6.3); The screw positioning and holding mechanism (2.2.11) comprises a magnet (2.2.11.1), a guide rail pressure plate (2.2.11.2), and a screw positioning tool (2.2.11.3); The servo positioning tightening system (2.2) is installed on the main back plate (2.4), the main back plate (2.4) is installed on the column (2.3), the column (2.3) is fixed on the equipment platform (1), the downward pressure cylinder (2.2.1) is connected to the clamping connecting plate (2.2.13), the screw head cylinder (2.2.8) is fixed on the clamping connecting plate (2.2.13), and is connected to the servo motor connecting plate (2.2.12), the servo motor is fixed on the servo motor connecting plate (2.2.12), the servo motor (2.2.2) is connected to the reducer (2.2.3), and The tightening shaft (2.2.5) is connected to the tightening shaft (2.2.5) by a coupling (2.2.4), the screwdriver bit connector (2.2.7) is rigidly connected to the tightening shaft (2.2.5), the screwdriver bit (2.2.10) is installed at the front and is concentric with the nut end of the workpiece in the vertical direction; the displacement control mechanism (2.2.6) is installed on the elastic pressure plate (2.2.9), the displacement sensor (2.2.6.1) is fixed on the displacement measuring fixture plate (2.2.6.2), the displacement measuring fixture plate (2.2.6.2) is fixed on the elastic pressure plate (2.2.9), and the spring (2.

2. 6.3) Press the elastic pressure plate (2.2.9) to ensure that the displacement sensor (2.2.6.1) is in the initial position. The screw positioning and holding mechanism (2.2.11) is fixed on the displacement measurement fixture plate (2.2.6.2) and moves synchronously with the displacement measurement fixture plate (2.2.6.2) to ensure that the displacement sensor (2.2.6.1) is accurately moved. The magnet (2.2.11.1) is installed on the wall of the screw positioning fixture (2.2.11.3) to absorb the screw. The screw is manually placed inside the fixture. The screw is automatically absorbed on the fixture surface. The cylinder (2.2.11.1) is pressed down. 2.1) drives the clamping connecting plate (2.2.13) to move downward and descend to the bracket plane. After the guide rail is clamped, the short screw falls into the bracket hole, and the servo motor (2.2.2) starts to start. As the screw is screwed in, the displacement control mechanism (2.2.6) moves downward together. When the set position parameter is reached, the servo motor (2.2.2) stops immediately, and the screw head retracting cylinder (2.2.8) drives the screw head (2.2.10) to move upward and withdraw from the screw hole. The downward pressure cylinder (2.2.1) drives the servo positioning tightening system (2.2) to move upward and return to its original position.

6. The automatic device for threading the shaft of the guide rail bracket of the lifter and positioning and tightening the height-adjusting screws according to claim 5 is characterized by: The long screw tightening and positioning mechanism (3) has the same structure as the servo positioning and tightening system (2.2), and together with the guide rail tooling positioning and nut end positioning mechanism (4), realizes the long screw positioning and tightening function; The guide rail fixture positioning and nut end positioning mechanism (4) comprises a guide rail nut end positioning (4.1) and a guide rail fixture positioning (4.2), and works in conjunction with the long screw tightening positioning mechanism (3).

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