Jack guide sleeve tightening machine

Abstract

The invention discloses a jack guide sleeve tightening machine, which is suitable for a jack in which a piston rod group and a cylinder are assembled. The head of the cylinder is provided with an internal thread matched with the guide sleeve, the tail of the cylinder is provided with a pin hole ear, and the flange outer edge of the guide sleeve is provided with a groove. The operating table of the tightening machine is provided with: a clamping mechanism having a clamping claw for clamping the cylinder; a rotation-stopping mechanism, which is provided on one side of the clamping mechanism and has a clamping unit for clamping the pin hole ear, and a first propulsion unit is provided between the clamping unit and the operating table; a tightening mechanism, which is provided on the other side of the clamping mechanism and has a tightening unit for screwing the guide sleeve, and a second propulsion unit is provided between the tightening unit and the operating table. The invention has a simple structure and is easy to use, can realize the automatic tightening of the jack guide sleeve, effectively reduces the labor intensity of workers, and ensures the tightening effect and pre-tightening force of the guide sleeve thread.

Description

Technical Field

[0001] The invention relates to the technical field of jack assembly, in particular to a jack guide sleeve tightening machine. Background Art

[0002] The hydraulic support is one of the key equipment for comprehensive mining in coal mines, and the jack is one of the important components of the hydraulic support, which plays a vital role in the safe and stable operation of the hydraulic support. The assembly of the jack mainly includes the cleaning of incoming materials, the installation of the piston rod, the assembly of the cylinder piston rod assembly, the tightening of the guide sleeve, and the pressure test of the finished product. Among them, the tightening of the guide sleeve is done manually, that is, the guide sleeve thread is screwed into the cylinder with a toothed wrench and pre-tightened. The above-mentioned manual installation method of the guide sleeve cannot guarantee the tightening effect and pre-tightening force of the guide sleeve thread, resulting in low production efficiency and assembly quality of the jack, and high labor intensity of the workers. Summary of the invention

[0003] In order to solve the above problems, the present invention provides a jack guide sleeve tightening machine, which can specifically adopt the following technical solutions:

[0004] The jack guide sleeve tightening machine of the present invention is suitable for a jack in which a piston rod group and a cylinder are assembled. The head of the cylinder is provided with an internal thread matched with the guide sleeve, the tail of the cylinder is provided with a pin hole ear, and the outer edge of the flange of the guide sleeve is provided with a groove.

[0005] A clamping mechanism having a clamping jaw for clamping the cylinder barrel;

[0006] A rotation-stopping mechanism is arranged on one side of the clamping mechanism and has a clamping unit for clamping the pin hole ear, and a first propulsion unit is arranged between the clamping unit and the operating table;

[0007] The tightening mechanism is arranged on the other side of the clamping mechanism and has a tightening unit for screwing the guide sleeve. A second propulsion unit is arranged between the tightening unit and the operating table.

[0008] The clamping jaws are arranged in pairs and connected to a driving unit, and the driving unit includes

[0009] A first support frame, disposed below the clamping jaws;

[0010] A sliding frame is slidably connected to the first supporting frame, and comprises a left frame and a right frame, wherein the top of the left frame and the top of the right frame are respectively connected to a clamping claw;

[0011] Drive components, including

[0012] A driving cylinder is arranged on the first support frame, and its piston rod is connected to the left frame;

[0013] A fixed gear, arranged on the first support frame and located between the left frame and the right frame;

[0014] An active rack, one end of which is meshed with the fixed gear and the other end of which is connected to the left frame;

[0015] One end of the driven rack is meshed with the fixed gear, and the other end is connected to the right frame.

[0016] The operating table is connected to the first support frame via a longitudinal linear rail, and a position adjustment unit is also provided on the first support frame.

[0017] The clamping mechanism is provided in two sets.

[0018] The clamping unit comprises:

[0019] The card slot has a receiving cavity, and an opening structure is provided on a side of the receiving cavity opposite to the clamping mechanism;

[0020] A plurality of clamping assemblies are arranged in the accommodating cavity, each of which comprises

[0021] A horizontal clamping plate, disposed near one side of the opening of the accommodating cavity and slidably connected to the clamping slot;

[0022] A telescopic guide rod, one end of which is connected to the horizontal clamping plate, and the other end of which is connected to the clamping slot;

[0023] The elastic reset member is sleeved on the telescopic guide rod.

[0024] The first propulsion unit comprises

[0025] A second support frame is arranged below the clamping unit, and the two are slidably connected;

[0026] The anti-rotation propulsion cylinder is arranged on the second support frame and connected to the clamping unit.

[0027] The second supporting frame is arranged on the clamping mechanism.

[0028] The tightening unit comprises

[0029] A third support frame, slidably connected to the operating table;

[0030] A rotating chuck is arranged on the third support frame, the rotating chuck is an annular structure, a radial groove is arranged on the rotating chuck, and a claw matching with the groove on the outer edge of the guide sleeve flange is arranged in the radial groove;

[0031] The rotary drive mechanism is arranged on the third support frame and is used for driving the rotary chuck to rotate.

[0032] The clamping claw is connected to the clamping cylinder; the rotary drive mechanism comprises a gear ring arranged concentrically with the rotary chuck, and the gear ring is meshed with a rotary gear driven by a tightening motor.

[0033] The second propulsion unit includes a tightening propulsion cylinder arranged on the third support frame, and the tightening propulsion cylinder is connected to a limit block arranged on the operating table.

[0034] The jack guide sleeve tightening machine provided by the present invention has a simple structure and is easy to use. It can realize automatic tightening of the jack guide sleeve, effectively reduces the labor intensity of workers, ensures the tightening effect and pre-tightening force of the guide sleeve thread, and when it is used in the jack automatic assembly production line, the working cycle is stable within 180s, which is stable and reliable, meets the requirements of the assembly line, and significantly improves the tightening efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a structural schematic diagram of the present invention.

[0036] Figure 2 yes Figure 1 Schematic diagram of the structure of the jack for tightening the guide sleeve.

[0037] Figure 3 yes Figure 1 Lateral view of the clamping mechanism.

[0038] Figure 4 yes Figure 1 Schematic diagram of the structure of the stop transfer mechanism.

[0039] Figure 5 yes Figure 1 Lateral view of the tightening mechanism.

[0040] Figure 6 yes Figure 5 Longitudinal section of . DETAILED DESCRIPTION

[0041] The following is a detailed description of an embodiment of the present invention in conjunction with the accompanying drawings. This embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation method and a specific working process are given, but the protection scope of the present invention is not limited to the following embodiment.

[0042] like Figure 1-6 As shown in FIG. 1 , the jack guide sleeve tightening machine of the present invention is composed of a clamping mechanism A, a rotation-stopping mechanism B and a tightening mechanism C arranged on an operating table. It is suitable for a jack Q (see FIG. 1 ) in which a cylinder a and a piston rod b are assembled. Figure 2 ), wherein the head of the cylinder a is provided with an internal thread c1 matched with the guide sleeve c, the tail of the cylinder a is provided with a pin hole ear a1, and the outer edge of the flange of the guide sleeve c is provided with a groove c2.

[0043] The clamping mechanism A comprises a position adjustment unit and a clamping jaw connected to a driving unit, and the clamping jaws are arranged in pairs and are used to clamp the cylinder a. Specifically, the driving unit comprises a first support frame A101, the bottom plate of the first support frame A101 is connected to the operating table through a longitudinal linear rail A102, and a transverse slide rail A103 is installed on the top plate of the first support frame A101. The transverse slide rail A103 is used to connect the sliding frame of the door-type structure. The sliding frame is divided into a left frame A104 and a right frame A105, and the top of the left frame A104 and the top of the right frame A105 are respectively connected with a clamping jaw A2; in order to allow the clamping jaw to open and close freely, the first support frame A101 is provided with a plurality of clamping jaws A2. A driving assembly is also installed on 101, which includes a driving cylinder A301 installed horizontally on the left side of the first support frame A101, and its piston rod is connected to the left frame A104; a horizontally arranged active rack A302 is also connected to the left frame A104, and the other end of the active rack A302 is meshed with a fixed gear A303 installed in the middle of the first support frame A101, and at the same time, the fixed gear A303 is also meshed with a driven rack A304 connected to the right frame A105. The above-mentioned active rack A302 and the driven rack A304 are meshed and parallel to each other, and are respectively located at the top and bottom of the fixed gear A303; when the piston rod of the driving cylinder A301 is pushed out, the left frame A104 and the active rack A302 move to the right, driving the fixed gear A303 to rotate, so that the driven rack A304 and the right frame A105 connected thereto move to the left, so that the clamping jaws A2 are clamped together.

[0044] The above-mentioned method of using a cylinder to push the rack and thus drive the clamping claws to clamp can not only clamp the outer circumferential surfaces of cylinders of different diameters, but also because the gear transmission is more precise, the axis of the cylinders of different diameters can be positioned on the rotation center line of the tightening mechanism C, avoiding the need to repeatedly adjust the position of the tightening mechanism C according to the cylinder axis when tightening.

[0045] Normally, there are two sets of clamping mechanisms A, and the clamping claws of the two sets can clamp the head and tail of the cylinder a respectively, making the clamping more stable. Therefore, a position adjustment unit is also installed on the bottom plate of the first support frame A101, which can adjust the position of the clamping mechanism A on the longitudinal linear rail A102 according to the specifications of the jack. The above-mentioned position adjustment unit includes a servo motor A401 installed above the bottom plate of the first support frame A101, and the servo motor A401 is used to drive the position adjustment gear A402 under the bottom plate, and the position adjustment gear A402 is meshed with the adjustment rack A403 fixed on the operating table parallel to the longitudinal linear rail A102.

[0046] The anti-rotation mechanism B can be directly installed on the operating table, or it can be installed on the bottom plate of the first right support frame A101, and move longitudinally with it, which is conducive to reducing the number of adjustment steps. The anti-rotation mechanism B in this embodiment has a clamping unit for clamping the pin hole ear a1, and a first propulsion unit arranged between the clamping unit and the bottom plate of the first support frame A101. Specifically, the clamping unit includes a clamping slot B1 composed of a bottom plate, a left side plate, a right side plate and a rear side plate, so that the accommodating cavity of the clamping slot B1 has an opening structure opposite to the clamping mechanism A; multiple groups of clamping components are installed in the above-mentioned accommodating cavity from top to bottom, and each group of clamping components includes a horizontal clamping plate B201, a telescopic guide rod B202 and an elastic reset member B203. Among them, the horizontal card plate B201 is slidably installed in the longitudinal guide grooves opened on the left and right plates. The horizontal card plate B201 is arranged near the opening of the accommodating cavity, and its rear part is connected to the horizontally arranged telescopic guide rod B202. The tail of the telescopic guide rod B202 is fixed on the rear side plate, and the elastic reset member B203 is sleeved on the telescopic guide rod B202. The above-mentioned first propulsion unit includes a second support frame B301 installed on the bottom plate of the first support frame A101. A longitudinal slide rail B302 is installed on the top surface of the second support frame B301 for connecting the bottom plate of the card slot B1; a horizontally arranged anti-rotation propulsion cylinder B303 is also installed on the second support frame B301, and its piston rod is connected to the bottom plate of the card slot B1.

[0047] When the pin hole ear a1 at the rear of the cylinder a needs to be clamped, the clamping slot B1 is pulled toward the pin hole ear a1 through the anti-rotation propulsion cylinder B303. As the distance shortens, the pin hole ear a1 first contacts the horizontal clamping plate B201 opposite to it, and then the horizontal clamping plate B201 is pressed toward the rear of the clamping slot B1. The pin hole ear a1 then enters the accommodating cavity and is clamped between the horizontal clamping plates B201 above and below it, achieving the anti-rotation effect. Due to the action of the elastic reset member B203, when the pin hole ear a1 exits the accommodating cavity, the telescopic guide rod B202 and the horizontal clamping plate B201 will both return to their original state, ready for the next anti-rotation.

[0048] Considering the different thicknesses of pin holes of different types of cylinder barrels, multiple sets of clamping assemblies are usually designed, and the spacing of the clamping assemblies can be set according to actual needs. When stopping the rotation, pin holes of different thicknesses press against different numbers of horizontal clamping plates and are clamped between the horizontal clamping plates, thereby stopping the rotation of different types of jack cylinder barrels.

[0049] The tightening mechanism C is arranged on the other side of the clamping mechanism A relative to the anti-rotation mechanism B, and has a tightening unit for screwing the guide sleeve, and a second propulsion unit is arranged between the tightening unit and the operating table. Specifically, the tightening unit includes a third support frame C101 slidably mounted on the longitudinal linear rail A102, and a rotating chuck C102 of an annular structure is mounted on the third support frame C101 through a cross roller bearing, and its central circular hole is used to pass through the guide sleeve c; in order to connect and fix the flange sleeve c, four radial grooves corresponding to the outer edge groove c2 of the flange of the guide sleeve c are evenly opened on the rotating chuck C102, and a clamping cylinder C103 corresponding to the radial groove is installed on the outer circumference of the rotating chuck C102, and the piston rod of the clamping cylinder C103 is inserted in the corresponding radial groove, and the end of the piston rod is installed with a T-shaped claw C104 adapted to the outer edge groove c2 of the flange of the guide sleeve c. The rotation of the rotating chuck C102 relies on a rotating drive mechanism, which includes a tightening motor C105 installed on the third support frame C101. A rotating gear is installed on the motor shaft of the tightening motor C105, and the rotating gear is meshed with a ring gear C106 installed on the rotating chuck C102. The ring gear C106 is located on the inner side of the third support frame C101 and is concentrically arranged with the rotating chuck C102. The second propulsion unit includes a tightening propulsion cylinder C107 installed at the bottom of the third support frame C101, which is connected to a limit block C108 installed on the operating table.

[0050] During the tightening process, first push the guide sleeve c into the central circular hole of the rotating chuck C102, then the clamping cylinder C103 is activated to make the T-shaped claw C104 extend out of the outer edge groove c2 of the clamping guide sleeve c flange, and then the tightening motor C105 is started to rotate the rotating chuck C102 to screw the guide sleeve c. When screwing, first use a low torque to realize thread recognition, and then use a large torque to pre-tighten after tightening in place; and during the screwing process, the tightening push cylinder C107 pushes the third support frame C101 to feed toward one side of the jack.

[0051] Considering that the thread may not be screwed in or damaged when the guide sleeve is screwed in, low torque is used to screw in and tighten the guide sleeve c first; if it is not screwed in, the tightening motor C105 is reversed and screwed in again, and a large torque is used to pre-tighten the guide sleeve c after it is screwed in place. Tightening process parameters such as screwing in and pre-tightening torque are automatically adjustable according to the product type. The control system uses real-time dynamic monitoring of torque. When the torque value exceeds the set value, the system will alarm, so that the thread will not be damaged during the screwing and screwing process of the guide sleeve.

[0052] The control system of the present invention uses S7-1500 PLC as the controller, Siemens Smart Screen as the human-machine interface, servo motors and cylinders as the power elements, and position detection is performed through magnetic and proximity switches. The tightening process parameters are saved in the Smart Screen formula, the jack type is read out through the RFID on the material frame, and the tightening process data of the corresponding type of cylinder in the formula is loaded. The control system controls the servo motor and cylinder to drive according to the parameters to realize the clamping, stopping and tightening processes. During the whole process, the control system monitors the equipment status, torque data, etc. in real time and alarms for faults.

[0053] The working process of the present invention is as follows: first, the control system reads the type of jack to be assembled; then, according to the type of jack, the control system PLC loads the corresponding tightening process parameters in the process recipe; then, the clamping mechanism A adjusts its position on the longitudinal linear rail A102 according to the parameters, and accepts the robot material, so that the clamping claw A2 clamps the jack cylinder a; then, the anti-rotation mechanism B clamps the pin hole ear a1 to stop the cylinder a from rotating; finally, the clamping mechanism A transfers the jack to the rotating chuck C102, and after the T-shaped clamping claw C104 clamps the guide sleeve c, the tightening mechanism C screws the guide sleeve c into the cylinder a and pre-tightens it, and finally completes the tightening of the guide sleeve c.

[0054] The invention realizes automatic tightening of the jack guide sleeve and is compatible with most types of jacks currently, reducing the labor intensity of workers. When it is used in the automatic assembly production line of jacks, the working cycle can be stabilized within 180s, which is stable and reliable and meets the requirements of the assembly line. At the same time, the invention can also be used in other types of production lines to solve the tightening problem of other threaded workpieces.

[0055] It should be noted that, in the description of the present invention, terms indicating orientation or positional relationships, such as "front", "rear", "left", "right", "vertical", "horizontal", "inside", "outside", etc., are based on the orientation or positional relationships shown in the drawings and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

Claims

1. A jack guide sleeve tightening machine, suitable for a jack in which a piston rod group and a cylinder are assembled, the head of the cylinder is provided with an internal thread adapted to the guide sleeve, the tail of the cylinder is provided with a pin hole ear, and the outer edge of the flange of the guide sleeve is provided with a groove, characterized in that: The operating table of the tightening machine is provided with A clamping mechanism having a clamping jaw for clamping the cylinder barrel; The anti-rotation mechanism is arranged on one side of the clamping mechanism and has a clamping unit for clamping the pin hole ear, and a first propulsion unit is arranged between the clamping unit and the operating table; A tightening mechanism, arranged at the other side of the clamping mechanism, having a tightening unit for screwing the guide sleeve, wherein a second propulsion unit is arranged between the tightening unit and the operating table; The clamping unit comprises The card slot has a receiving cavity, and an opening structure is provided on a side of the receiving cavity opposite to the clamping mechanism; A plurality of clamping assemblies are arranged in the accommodating cavity, each of which comprises A horizontal clamping plate, disposed near one side of the opening of the accommodating cavity and slidably connected to the clamping slot; A telescopic guide rod, one end of which is connected to the horizontal clamping plate, and the other end of which is connected to the clamping slot; An elastic reset member, sleeved on the telescopic guide rod; The first propulsion unit comprises A second support frame is arranged below the clamping unit, and the two are slidably connected; A rotation-stopping propulsion cylinder is arranged on the second support frame and connected to the clamping unit; The tightening unit comprises A third support frame, slidably connected to the operating table; A rotating chuck is arranged on the third support frame, the rotating chuck is an annular structure, a radial groove is arranged on the rotating chuck, and a claw matching with the groove on the outer edge of the guide sleeve flange is arranged in the radial groove; The rotary drive mechanism is arranged on the third support frame and is used for driving the rotary chuck to rotate.

2. The jack guide sleeve tightening machine according to claim 1, characterized in that: The clamping jaws are arranged in pairs and connected to a driving unit, and the driving unit includes A first support frame, disposed below the clamping jaws; A sliding frame is slidably connected to the first supporting frame, and comprises a left frame and a right frame, wherein the top of the left frame and the top of the right frame are respectively connected to a clamping claw; Drive components, including A driving cylinder is arranged on the first support frame, and its piston rod is connected to the left frame; A fixed gear, arranged on the first support frame and located between the left frame and the right frame; An active rack, one end of which is meshed with the fixed gear and the other end of which is connected to the left frame; One end of the driven rack is meshed with the fixed gear, and the other end is connected to the right frame.

3. The jack guide sleeve tightening machine according to claim 2, characterized in that: The operating table is connected to the first support frame via a longitudinal linear rail, and a position adjustment unit is also provided on the first support frame.

4. The jack guide sleeve tightening machine according to claim 1, characterized in that: The clamping mechanism is provided in two sets.

5. The jack guide sleeve tightening machine according to claim 1, characterized in that: The second supporting frame is arranged on the clamping mechanism.

6. The jack guide sleeve tightening machine according to claim 1, characterized in that: The clamping claw is connected to the clamping cylinder; the rotary drive mechanism comprises a gear ring arranged concentrically with the rotary chuck, and the gear ring is meshed with a rotary gear driven by a tightening motor.

7. The jack guide sleeve tightening machine according to claim 1, characterized in that: The second propulsion unit includes a tightening propulsion cylinder arranged on the third support frame, and the tightening propulsion cylinder is connected to a limit block arranged on the operating table.

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