Lifting mechanism for tightening machine

Abstract

The utility model discloses a lifting mechanism for a tightening machine, and relates to the technical field of assembly production lines. Comprising a mounting base plate, linear bearings are fixedly mounted on the periphery of the mounting base plate, guide rods are slidably connected into the linear bearings, a fixing ring and a shaft seat are sequentially mounted at the bottom end of each guide rod from top to bottom, and a clamping piece is fixedly mounted at the top end of each guide rod; and floating joints are mounted at the output ends of the air cylinder and the electric cylinder. According to the lifting mechanism for the tightening machine, stable positioning and guiding can be provided through the arranged linear bearing and the arranged guide rod, vibration and free swing caused by machine movement can be eliminated, track deviation can be prevented, the tightening machine box is indirectly connected through cooperation of the linear bearing and the guide rod, and the tightening machine box is convenient to use. Torque force generated by the tightening machine cannot completely act on the air cylinder or the electric cylinder, and therefore the operation accuracy of the tightening machine body and the stability and safety of the lifting mechanism are guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of assembly production lines, in particular to a lifting mechanism for a tightening machine. Background Art

[0002] During the engine assembly process, almost all parts are connected by one or more bolts, among which the connection between the cylinder block and the cylinder head is particularly important. The bolts are tightened to produce uniform and appropriate compression force on the cylinder head gasket to seal the high-temperature and high-pressure gas in the cylinder, and at the same time seal the cooling water and lubricating oil. At present, the tightening of the cylinder head bolts mainly relies on the operation of a tightening machine. Since there are multiple bolts on the engine cylinder head, the tightening machine needs to constantly change its position to adjust the working position of the tightening gun to meet the tightening needs of the cylinder head bolts, which is time-consuming and laborious.

[0003] The patent with the patent publication number CN207309358U discloses a servo end cover tightening machine suitable for multiple models, including a slide rail assembly, a lifting cylinder, a tightening chassis, at least one bolt tightening electric gun, a drive device and a control device. The slide rail assembly and the lifting cylinder control the movement of the tightening chassis on the X-axis, Y-axis and Z-axis, which can realize the fast and accurate change of the position of the bolt tightening electric gun and is suitable for mixed-line production of multiple models.

[0004] However, due to the large size of the cylinder head bolts, a large tightening torque will be generated when tightening them, which will also generate a certain torque force when tightening the chassis. If the chassis is only suspended and tightened by the lifting cylinder, the torque force will directly act on the cylinder rod of the lifting cylinder, which may easily cause the cylinder rod to bend and affect the accuracy of the tightening operation. There is even a risk of the tightening machine falling off, and it is difficult to ensure the stability and safety of the lifting mechanism. Utility Model Content

[0005] The utility model provides a lifting mechanism for a tightening machine to solve the problems in the background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a lifting mechanism for a tightening machine, comprising a mounting base, linear bearings are fixedly installed around the mounting base, and a guide rod is slidably connected in the linear bearing, the bottom end of the guide rod is sequentially installed with a fixing ring and a shaft seat from top to bottom, and a clamping piece is fixedly installed on the top end, a cylinder and an electric cylinder are respectively installed on the mounting base, and floating joints are installed on the output ends of the cylinder and the electric cylinder, columns are fixedly installed around the mounting base, and a top plate is fixedly installed on the top of the column, a slewing bearing is fixedly installed on the top plate, and a connecting plate is fixedly installed on the slewing bearing, a brake shaft is fixedly installed on the connecting plate, and a power-loss brake is installed on the brake shaft.

[0007] Furthermore, a drag chain is provided on the installation base plate, and the drag chains are located on both sides thereof.

[0008] Furthermore, the guide rods are located around the mounting base plate, and two of the guide rods are connected via clamping members.

[0009] Furthermore, the air cylinder and the electric cylinder are located on the center line of the mounting base plate and are arranged symmetrically with respect to each other.

[0010] Furthermore, a lifting ring is fixedly installed on the bottom of the top plate, and the lifting ring is located at both ends thereof.

[0011] Furthermore, a lower limit block is arranged on the top plate, and an upper limit block is arranged on the connecting plate, and the upper limit block and the lower limit block are close to each other.

[0012] Compared with the prior art, the utility model provides a lifting mechanism for a tightening machine, which has the following

[0013] Beneficial effects:

[0014] 1. The lifting mechanism of the tightening machine is provided with linear bearings and guide rods, which can provide stable positioning and guidance, eliminate vibration and free swing caused by machine movement, and prevent trajectory deviation. The tightening machine chassis is indirectly connected through the linear bearings and guide rods, so that the torque force generated by the tightening machine will not be completely applied to the cylinder or electric cylinder, thereby ensuring the accuracy of the tightening machine operation and the stability and safety of the lifting mechanism.

[0015] 2. The lifting mechanism of the tightening machine is provided with a slewing bearing, which can axially rotate the tightening machine case connected to the lifting mechanism according to the working needs. After rotating into place, the parking brake is performed by the cooperation between the brake shaft and the power-off brake, which can ensure that the machine can stop rotating quickly and accurately when it needs to stop, thereby ensuring the stable operation and safety of the mechanical equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 For the utility model Figure 1 ;

[0018] Figure 3 For the utility model Figure 2 .

[0019] In the figure: 1. Mounting base plate; 2. Linear bearing; 3. Guide rod; 4. Fixing ring; 5. Shaft seat; 6. Clamp; 7. Cylinder; 8. Electric cylinder; 9. Floating joint; 10. Column; 11. Top plate; 12. Slewing bearing; 13. Connecting plate; 14. Brake shaft; 15. Power-off brake; 16. Drag chain; 17. Lifting ring; 18. Lower limit block; 19. Upper limit block. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1-Figure 3 The utility model discloses a lifting mechanism for a tightening machine, including a mounting base 1, linear bearings 2 are fixedly mounted around the mounting base 1, and a guide rod 3 is slidably connected in the linear bearing 2, a fixing ring 4 and an axle seat 5 are sequentially mounted on the bottom end of the guide rod 3 from top to bottom, and a clamping member 6 is fixedly mounted on the top end thereof, the linear bearing 2 and the guide rod 3 are arranged to provide stable positioning and guiding, and eliminate vibration and free swing caused by machine movement, and prevent trajectory deviation, and the tightening machine chassis is indirectly connected by the linear bearing 2 and the guide rod 3, so that the torque force generated by the tightening machine will not completely act on the cylinder 7 or the electric cylinder 8, thereby ensuring the accuracy of the tightening machine operation and the stability and safety of the lifting mechanism, and the cylinder 7 is respectively mounted on the mounting base 1 And electric cylinder 8, and floating joints 9 are installed on the output ends of the air cylinder 7 and the electric cylinder 8, columns 10 are fixedly installed around the mounting base plate 1, and a top plate 11 is fixedly installed on the top of the column 10, a slewing bearing 12 is fixedly installed on the top plate 11, and a connecting plate 13 is fixedly installed on the slewing bearing 12, a brake shaft 14 is fixedly installed on the connecting plate 13, and a power-loss brake 15 is installed on the brake shaft 14. The slewing bearing 12 can be axially rotated according to the needs of the operation, and after rotating into place, the parking brake is performed by using the cooperation between the brake shaft 14 and the power-loss brake 15, which can ensure that the machine can stop rotating quickly and accurately when it needs to stop, thereby ensuring the stable operation and safety of the mechanical equipment.

[0022] Specifically, the mounting substrate 1 is provided with a drag chain 16 , and the drag chain 16 is located on both sides thereof.

[0023] In this embodiment, the drag chain 16, also known as the wire and cable protection drag chain, is a device for restraining cables or wires or air pressure pipes and oil pressure pipes to facilitate their rotation and movement. It is mainly used to protect and guide cables, air pipes, hydraulic pipes and other components to ensure that these components can work stably and safely during the movement of the equipment. The design of the drag chain 16 enables it to retract and bend, and keep the internal cables and other equipment relatively stable, thereby avoiding damage caused by external environmental factors (such as friction, impact, etc.).

[0024] Specifically, the guide rods 3 are located around the mounting base plate 1 , and two of the guide rods 3 are connected by clamping members 6 .

[0025] In this embodiment, the bottom end of the guide rod 3 is connected to the tightening chassis through the shaft seat 5. The function of the clamping member 6 is to support and fix the guide rod 3 and determine the distance between the two guide rods 3 so that the guide rods 3 can be accurately positioned relative to each other to ensure the accuracy and stability of assembly. The main function of the linear bearing 2 and guide rod 3 used here is to provide linear motion and guiding functions.

[0026] Specifically, the air cylinder 7 and the electric cylinder 8 are located on the center line of the mounting base plate 1 and are arranged symmetrically with respect to each other.

[0027] In this embodiment, the electric cylinder 8 is a common mechatronics device, which is widely used in industrial automation control systems. Its working principle is based on the rotational motion of the motor, which converts the rotational motion into linear motion through a transmission mechanism to achieve push-pull operations on objects. The core components of the electric cylinder 8 are the motor and the transmission mechanism. The motor converts electrical energy into mechanical energy to generate rotational force to drive the transmission mechanism to work. The transmission mechanism usually uses screws, gears or belts to convert the rotational motion of the motor into linear motion, and transmits the linear motion to the working object through working parts such as pistons or sliders. The air cylinder 7 and the electric cylinder 8 are both power devices widely used as actuators in mechanical automation control systems. Among them, the electric cylinder 8 is a device that uses a motor as power to convert electrical energy into mechanical energy to drive the load, while the air cylinder 7 uses compressed air to generate thrust and converts the compressed air energy into mechanical energy to complete the work. On the automated production line, the combination of the air cylinder 7 and the electric cylinder 8 can achieve fast and precise motion control and improve production efficiency.

[0028] Specifically, a lifting ring 17 is fixedly installed on the bottom of the top plate 11, and the lifting ring 17 is located at both ends thereof.

[0029] In this embodiment, the lifting ring 17 is a lifting tool commonly used in industrial production. The lifting ring 17 has a strong bearing capacity and can well ensure the firmness of the fixed object. The lifting ring 17 is mainly used to cooperate with the iron chain to lock and tighten the mechanism to the chassis, which can achieve the purpose of mechanical fall prevention.

[0030] Specifically, a lower limit block 18 is disposed on the top plate 11 , and an upper limit block 19 is disposed on the connecting plate 13 , and the upper limit block 18 and the lower limit block 19 are close to each other.

[0031] In this embodiment, the main function of the upper limit block 18 and the lower limit block 19 is to limit the movement range of the object to prevent it from exceeding the predetermined position or range, thereby protecting the equipment and operating safety. The slewing bearing 12 is a large bearing that can withstand comprehensive loads and can simultaneously withstand large axial, radial loads and tilting moments. It is used to achieve smooth rotation between two structural components and is usually used in heavy machinery and industrial equipment. The power-off brake 15 is an electromagnetically disengaged (released) spring-loaded friction plate brake. When the electromagnetic is disengaged, friction is generated between the spring-loaded friction plate and the machine base and the armature, and the transmission shaft is braked through the gear sleeve to achieve rapid parking and accurate positioning. This brake can safely (prevent danger) brake when power is off, and is suitable for occasions that require rapid parking and safe braking. The combined use of the brake shaft 14 and the power-off brake 15 can ensure that the machine can stop rotating quickly and accurately when it needs to stop, which is crucial to ensuring the stable operation and safety of mechanical equipment. Especially in power outages or other emergency situations, the power-off brake 15 can play a key role in ensuring the safety of equipment and personnel.

[0032] When in use, the lifting mechanism is fixed on the ceiling rail of the assembly workshop, and connected and tightened to the chassis through the shaft seat 5 and the floating joint 9 (equivalent to the coupling, which is used to eliminate errors, protect related components and make the equipment run smoothly. The main function here is to absorb the eccentricity between the piston rod of the cylinder 7 and the electric cylinder 8 and the load, or the eccentric load and lateral load on the piston rod caused by the non-parallel installation. The design of this joint allows small offsets or non-parallel installations during the installation process, which are compensated by the micro-offset function of the joint, thereby protecting the piston rod from bending damage). The linear bearing 2 and guide rod 3 can provide stable positioning and guidance, and eliminate the eccentricity caused by the machine operation. The vibration and free swing caused by the movement can also prevent the trajectory from deviating. The tightening machine chassis is indirectly connected through the linear bearing 2 and the guide rod 3, so that the torque force generated by the tightening machine will not completely act on the cylinder 7 or the electric cylinder 8, thereby ensuring the accuracy of the tightening body operation and the stability and safety of the lifting mechanism. The slewing bearing 12 can be arranged to axially rotate the tightening machine chassis connected to the lifting mechanism according to the operation needs. After rotating into place, the parking brake is performed by the cooperation between the brake shaft 14 and the power-off brake 15, which can ensure that the machine can stop rotating quickly and accurately when it needs to stop, thereby ensuring the stable operation and safety of the mechanical equipment.

[0033] To sum up, the lifting mechanism of the tightening machine, the linear bearing 2 and the guide rod 3 provided can provide stable positioning and guidance, eliminate the vibration and free swing caused by the movement of the machine, and prevent trajectory deviation. The tightening machine chassis is indirectly connected through the cooperation of the linear bearing 2 and the guide rod 3, so that the torque force generated by the tightening machine will not completely act on the cylinder 7 or the electric cylinder 8, thereby ensuring the accuracy of the tightening body operation and the stability and safety of the lifting mechanism; the slewing bearing 12 provided can axially rotate the tightening machine chassis connected to the lifting mechanism according to the operation needs. After rotating into place, the parking brake is performed by using the cooperation between the brake shaft 14 and the power-off brake 15, which can ensure that the machine can stop rotating quickly and accurately when it needs to stop, thereby ensuring the stable operation and safety of the mechanical equipment.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A lifting mechanism for a tightening machine, comprising a mounting base (1), characterized in that: The installation base (1) is fixedly mounted with linear bearings (2) around it, and a guide rod (3) is slidably connected in the linear bearing (2). The bottom end of the guide rod (3) is sequentially mounted with a fixing ring (4) and a shaft seat (5) from top to bottom, and a clamping member (6) is fixedly mounted on the top end. A cylinder (7) and an electric cylinder (8) are respectively mounted on the installation base (1), and floating joints (9) are mounted on the output ends of the cylinder (7) and the electric cylinder (8). The installation base (1) is fixedly mounted with columns (10) around it, and a top plate (11) is fixedly mounted on the top of the column (10). A slewing bearing (12) is fixedly mounted on the top plate (11), and a connecting plate (13) is fixedly mounted on the slewing bearing (12). A brake shaft (14) is fixedly mounted on the connecting plate (13), and a power-off brake (15) is mounted on the brake shaft (14).

2. A lifting mechanism for a tightening machine according to claim 1, characterized in that: The installation base plate (1) is provided with a drag chain (16), and the drag chain (16) is located on both sides thereof.

3. The lifting mechanism for a tightening machine according to claim 1, characterized in that: The guide rods (3) are located around the mounting base plate (1), and two of the guide rods (3) are connected via clamping members (6).

4. The lifting mechanism for a tightening machine according to claim 1, characterized in that: The air cylinder (7) and the electric cylinder (8) are located on the center line of the mounting base plate (1), and are arranged symmetrically with respect to each other.

5. The lifting mechanism for a tightening machine according to claim 1, characterized in that: A lifting ring (17) is fixedly mounted on the bottom of the top plate (11), and the lifting ring (17) is located at both ends thereof.

6. A lifting mechanism for a tightening machine according to claim 1, characterized in that: The top plate (11) is provided with a lower limit block (18), and the connecting plate (13) is provided with an upper limit block (19), and the upper limit block (19) and the lower limit block (18) are close to each other.

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