Weighing device capable of resisting impact by using cylinder pressure

Abstract

The invention belongs to the technical field of workpiece machining, and discloses a weighing device capable of resisting impact by utilizing cylinder pressure, which comprises a fixed plate, two L-shaped supporting plates are fixedly connected to the top of the fixed plate, a first connecting plate is fixedly connected between the tops of the two L-shaped supporting plates, and two protective plates are fixedly connected to the top of the first connecting plate. A second connecting plate is fixedly connected between the two protective plates, a sleeve is fixedly connected to the bottom of the first connecting plate, and a pressure rod is slidably connected into the sleeve. The device has the beneficial effects that the mechanical transmission eccentric wheel-pulley-pressure rod is deeply fused with cylinder pressure control and pressure detection, and a complete process of power transmission, pressure feedback and result judgment is constructed. The cylinder pressure impact resistance characteristic can counteract the pressing impact load and guarantee the pressure detection precision; the compaction state of the workpiece is intelligently judged through the cylinder pressure change, no additional complex sensor is needed, the structure is simplified, meanwhile, double precision of press fitting quality and weighing data is achieved, multiple scenes such as press riveting and weighing are adapted, and actual application and operation are facilitated.

Description

Technical Field

[0001] This invention relates to the field of workpiece processing technology, and in particular to a weighing device that utilizes cylinder pressure to resist impact. Background Technology

[0002] In industrial production scenarios such as press fitting and weighing, there is an urgent need for precise pressing and pressure testing of workpieces.

[0003] In practical applications, existing equipment often relies on a single mechanical structure, lacks a precise and controllable power source, has poor pressure rod movement accuracy and stability, and misalignment of the upper and lower molds can easily affect pressing quality and weighing accuracy. In terms of pressure detection and judgment, it is difficult to effectively perceive the compaction state of the workpiece, and it is impossible to intelligently judge whether the operation is in place based on pressure changes. Furthermore, it has weak resistance to impact loads, and the cylinder pressure utilization method is limited, which is not conducive to practical application and operation. Summary of the Invention

[0004] One object of the present invention is to provide a weighing device that utilizes cylinder pressure to resist impact.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a weighing device using cylinder pressure to resist impact, comprising a fixed plate, two L-shaped support plates fixedly connected to the top of the fixed plate, a first connecting plate fixedly connected between the tops of the two L-shaped support plates, two protective plates fixedly connected to the top of the first connecting plate, a second connecting plate fixedly connected between the two protective plates, a sleeve fixedly connected to the bottom of the first connecting plate, a pressure rod slidably connected inside the sleeve, the bottom of the pressure rod penetrating the sleeve and fixedly connected to an upper mold, a bidirectional cylinder mounted and connected to the bottom of the fixed plate, a piston rod at the top of the bidirectional cylinder penetrating the fixed plate and fixedly connected to a lower mold, the lower mold cooperating with the upper mold, the top of the pressure rod extending above the first connecting plate and rotatably connected to a pulley, an eccentric wheel rotatably connected to the outer side of the second connecting plate, the eccentric wheel cooperating with the pulley, and a pressure detector installed and connected to the air source connection of the bidirectional cylinder.

[0006] Preferably, a sliding groove is provided on the outer side of the sleeve, a rotating rod is rotatably connected between the two L-shaped support plates, a toggle rod is fixedly connected to the outer side of the rotating rod, and one end of the toggle rod passes through the sliding groove and is fixedly connected to the pressure rod.

[0007] Preferably, a speed reducer is installed on the side of the second connecting plate away from the eccentric wheel, the output shaft of the speed reducer is fixedly connected to the eccentric wheel, and a servo motor is installed on the outside of the speed reducer, the output shaft of the servo motor is installed and connected to the speed reducer.

[0008] Preferably, support rods are installed and connected to the four corners of the bottom of the fixed plate, and a base plate is fixedly connected between the bottoms of the four support rods. The piston rod at the bottom of the bidirectional cylinder extends to the top of the base plate and is threaded with adjusting caps at equal intervals on its outer side.

[0009] Preferably, the outer side of the fixed plate is provided with a through groove, the top of the actuating rod is fixedly connected to the first connecting plate with a spring, the two sides of the actuating rod are rotatably connected with connecting rods, the bottom of the connecting rods passes through the through groove and is rotatably connected with a pedal, and the pedal is rotatably connected to the base plate.

[0010] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0011] (1) This invention integrates mechanical transmission eccentric wheel-pulley-pressure rod with cylinder pressure control and pressure detection to construct a complete process of "power transmission + pressure feedback + result judgment". The cylinder pressure has anti-impact characteristics, which can offset the downward impact load and ensure the accuracy of pressure detection; the compaction state of the workpiece is intelligently determined by the change of cylinder pressure, without the need for additional complex sensors. While simplifying the structure, it can achieve double accuracy of pressing quality and weighing data, and is suitable for multiple scenarios such as riveting and weighing.

[0012] (2) The present invention provides a dual control dimension for the movement of the pressure rod through the "rigid auxiliary transmission" structure of the rotating rod and the actuating rod: it can both compensate for the possible motion deviation of the main transmission (eccentric wheel-pulley) and improve the alignment accuracy of the upper and lower molds; and through active actuation, it can accurately trigger the process node, so that the timing of the pressing action and the cylinder pressure detection is more matched, and strengthen the device's control over the pressing rhythm. It is especially suitable for complex processes that require precise triggering and step-by-step actions. The power combination of servo motor and reducer achieves the dual advantages of "precise speed regulation + torque matching": the servo motor accurately controls the speed, so that the eccentric wheel can ensure the stability of the pressure rod's pressing stroke and speed; after the reducer increases the torque, it can adapt to the pressing resistance of workpieces with different hardness, avoid motor overload, expand the applicability of the device, and the power output is linear and controllable, and the coordination with the cylinder pressure detection is smoother.

[0013] (3) The present invention strengthens the overall rigidity of the device by supporting rod + base plate, reduces the impact of downward vibration on cylinder pressure detection and mold alignment, and ensures accuracy; the adjusting cap uses the thread fine adjustment characteristics, only the adjustment amount is needed to adapt to the mold height difference, solves the clamping adaptation problem caused by "mold replacement / workpiece thickness fluctuation", eliminates the need for frequent adjustment of the cylinder body, simplifies operation and improves the efficiency of mold changeover, the spring realizes the "automatic reset" of the lever, reduces manual intervention, makes the reciprocating motion of the pressure rod smoother, and avoids abnormal cylinder pressure detection due to transmission jamming; the linkage rod + pedal constructs a "mechanical linkage-manual intervention" dual path: it not only expands the operation mode, but also indirectly monitors the pressure rod status through the pedal position, provides redundant feedback for the automation process, and improves the reliability and maintenance convenience of the device. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0015] Figure 2 This is a schematic diagram of the rear view structure of the present invention.

[0016] Figure 3 This is a schematic diagram of the main structure of the present invention.

[0017] Figure 4 This is a side view of the structure of the present invention.

[0018] In the diagram: 1. Fixed plate; 2. L-shaped support plate; 3. First connecting plate; 4. Guard plate; 5. Second connecting plate; 6. Support rod; 7. Base plate; 8. Sleeve; 9. Pressure rod; 10. Lower mold; 12. Pulley; 13. Eccentric wheel; 14. Reducer; 15. Servo motor; 16. Two-way cylinder; 17. Slide groove; 18. Rotating rod; 19. Actuating rod; 20. Adjusting cap; 21. Spring; 22. Linkage rod; 23. Through groove; 24. Pedal. Detailed Implementation

[0019] The present invention will now be further described in conjunction with specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0020] In the description of this invention, it should be noted that directional terms such as "center," "lateral," "longitudinal," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise" indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limiting the specific protection scope of this invention.

[0021] It should be noted that the terms "first" and "second" in the specification and claims of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0022] One preferred embodiment of the present invention, such as Figures 1 to 4As shown, a weighing device using cylinder pressure to resist impact includes a fixed plate 1. Two L-shaped support plates 2 are fixedly connected to the top of the fixed plate 1. A first connecting plate 3 is fixedly connected between the tops of the two L-shaped support plates 2. Two protective plates 4 are fixedly connected to the top of the first connecting plate 3. A second connecting plate 5 is fixedly connected between the two protective plates 4. A sleeve 8 is fixedly connected to the bottom of the first connecting plate 3. A pressure rod 9 is slidably connected inside the sleeve 8. The bottom of the pressure rod 9 passes through the sleeve 8 and is fixedly connected to an upper mold. A bidirectional cylinder 16 is installed and connected to the bottom of the fixed plate 1. The piston rod at the top of the bidirectional cylinder 16 passes through the fixed plate 1 and is fixedly connected to a lower mold 10. The lower mold 10 cooperates with the upper mold. The top of the pressure rod 9 extends above the first connecting plate 3 and is rotatably connected to a pulley 12. An eccentric wheel 13 is rotatably connected to the outside of the second connecting plate 5. The eccentric wheel 13 cooperates with the pulley 12. A pressure detector is installed and connected to the air source connection of the bidirectional cylinder 16.

[0023] In this embodiment, the servo motor 15 drives the eccentric wheel 13 to rotate via the reducer 14. The eccentric wheel 13, in cooperation with the pulley 12, converts the rotational motion into the linear reciprocating sliding of the pressure rod 9 within the sleeve 8, thereby realizing the pressing action of the upper mold. The bidirectional cylinder 16 is pre-charged to a set pressure to provide stable cylinder pressure to "hold" the workpiece in place. When the eccentric wheel-pulley-pressure rod transmission presses down, the pressure detector monitors the pressure change between the upper and lower molds 10 in real time. If the workpiece is relatively soft, the cylinder pressure will not change significantly during pressing, indicating that the riveting is in place. If the cylinder pressure increases with pressing, it indicates that the workpiece is gradually compacted. Finally, the corresponding kilogram of clamping force is calculated through the cylinder pressure data to complete the weighing / pressing judgment.

[0024] like Figures 1 to 4 As shown, a groove 17 is provided on the outer side of the sleeve 8, and a rotating rod 18 is rotatably connected between the two L support plates 2. A toggle rod 19 is fixedly connected to the outer side of the rotating rod 18. One end of the toggle rod 19 passes through the groove 17 and is fixedly connected to the pressure rod 9.

[0025] In this embodiment, when the rotating rod 18 is driven to rotate by an external force, it synchronously drives the actuating rod 19 to move. Since one end of the actuating rod 19 passes through the sliding groove 17 of the sleeve 8 and is rigidly connected to the pressure rod 9, it can directly intervene in the sliding trajectory and position of the pressure rod 9 in the sleeve 8, and assist the main transmission mechanism in adjusting the movement rhythm and stroke of the pressure rod 9. For example, it can cooperate with the triggering of the "fork start switch" to precisely control the timing of the downward pressure.

[0026] like Figures 1 to 4 As shown, a reducer 14 is installed on the side of the second connecting plate 5 away from the eccentric wheel 13. The output shaft of the reducer 14 is fixedly connected to the eccentric wheel 13. A servo motor 15 is installed on the outside of the reducer 14. The output shaft of the servo motor 15 is installed and connected to the reducer 14.

[0027] In this embodiment, the servo motor 15 serves as a power source, outputting high-speed, low-torque power. After being reduced and amplified by the reducer 14, the power is converted into a stable speed and torque that is compatible with the rotation of the eccentric wheel 13 to meet the downward pressure power requirements. This drives the eccentric wheel 13 to rotate continuously and stably, providing precise and controllable power input to the "eccentric wheel-pulley-pressure rod" transmission chain, ensuring the consistency of the downward pressure speed and stroke of the pressure rod 9.

[0028] like Figures 1 to 4 As shown, support rods 6 are installed and connected to the four corners of the bottom of the fixed plate 1. A base plate 7 is fixedly connected between the bottoms of the four support rods 6. The piston rod of the bottom of the bidirectional cylinder 16 extends to the top of the base plate 7 and is threaded with adjusting caps 20 at equal intervals on the outside.

[0029] In this embodiment, the support rod 6 and the base plate 7 form a rigid support frame at the bottom of the device, which stably supports the fixed plate 1 and the components above it; the piston rod at the bottom of the bidirectional cylinder 16 extends to the top of the base plate 7, and the adjusting cap 20 is threadedly fitted onto the piston rod. Rotating the adjusting cap 20 can change its axial position on the piston rod, thereby finely adjusting the height of the pressure detector at the top of the bidirectional cylinder 16 and the lower mold 10 to adapt to the clamping requirements of different workpieces.

[0030] like Figures 1 to 4 As shown, a through groove 23 is provided on the outer side of the fixed plate 1. A spring 21 is fixedly connected between the top of the toggle lever 19 and the first connecting plate 3. A connecting rod 22 is rotatably connected to both sides of the toggle lever 19. The bottom of the connecting rod 22 passes through the through groove 23 and is rotatably connected to a pedal 24. The pedal 24 is rotatably connected to the base plate 7.

[0031] In this embodiment, when the lever 19 moves, it compresses or stretches the spring 21. The spring 21 generates a reverse elastic force based on Hooke's law, which assists the lever 19 in resetting, making the movement cycle of the pressure lever 9 more continuous. At the same time, the lever 19 is hinged to the pedal 24 through the connecting rod 22. The displacement of the lever 19 can be converted into the swing of the pedal 24 around the base plate 7, realizing the mechanical feedback of "pressure lever movement - pedal linkage". The lever 19 can be manually triggered or intervened by the pedal 24, or the position of the pedal 24 can be used to feedback the state of the lever 19. Working principle:

[0032] In use, the servo motor 15 drives the eccentric wheel 13 to rotate via the reducer 14. The eccentric wheel 13, in cooperation with the pulley 12, converts the rotational motion into the linear reciprocating sliding of the pressure rod 9 within the sleeve 8, thereby realizing the pressing action of the upper mold. The bidirectional cylinder 16 is pre-charged to the set pressure to provide stable cylinder pressure to "hold" the pressure. When the eccentric wheel-pulley-pressure rod transmission presses down, the pressure detector monitors the pressure change between the upper and lower molds 10 in real time. If the workpiece is relatively soft, the cylinder pressure will not change significantly when pressed down, indicating that the riveting is in place. If the cylinder pressure increases with pressing down, it means that the workpiece is gradually compacted. Finally, the corresponding kilogram of clamping force is calculated by converting the cylinder pressure data to complete the weighing / pressing judgment. When the rotating rod 18 is driven to rotate by an external drive, it synchronously drives the moving rod 19 to move. Since one end of the moving rod 19 passes through the sliding groove 17 of the sleeve 8 and is rigidly connected to the pressure rod 9, it can directly intervene in the sliding trajectory and position of the pressure rod 9 in the sleeve 8, and assist the main transmission mechanism in adjusting the movement rhythm and stroke of the pressure rod 9. For example, it can be used in conjunction with triggering the "shift fork start switch" to accurately control the starting time of pressing down. The servo motor 15 serves as the power source, outputting high-speed, low-torque power. After being reduced and amplified by the reducer 14, it is converted into a stable speed and torque that matches the rotation of the eccentric wheel 13 to meet the pressing power requirements, driving the eccentric wheel 13 to rotate continuously and stably, providing precise and controllable power input to the "eccentric wheel-pulley-pressure rod" transmission chain, ensuring the consistency of the pressing speed and stroke of the pressure rod 9.

[0033] The basic principles, main features, and advantages of this invention have been described above. Those skilled in the art should understand that this invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made without departing from the spirit and scope of the invention, and all such changes and modifications fall within the scope of the invention as claimed. The scope of protection claimed by this invention is defined by the appended claims and their equivalents.

Claims

1. A weighing device that utilizes cylinder pressure to resist impact, characterized in that, The device includes a fixing plate (1), characterized in that: two L-shaped support plates (2) are fixedly connected to the top of the fixing plate (1), a first connecting plate (3) is fixedly connected between the tops of the two L-shaped support plates (2), two protective plates (4) are fixedly connected to the top of the first connecting plate (3), a second connecting plate (5) is fixedly connected between the two protective plates (4), a sleeve (8) is fixedly connected to the bottom of the first connecting plate (3), a pressure rod (9) is slidably connected inside the sleeve (8), and the bottom of the pressure rod (9) penetrates the sleeve (8) and is fixedly connected to an upper... The mold has a double-acting cylinder (16) installed at the bottom of the fixed plate (1). The piston rod at the top of the double-acting cylinder (16) passes through the fixed plate (1) and is fixedly connected to the lower mold (10). The lower mold (10) works with the upper mold. The top of the pressure rod (9) extends to the top of the first connecting plate (3) and is rotatably connected to the pulley (12). An eccentric wheel (13) is rotatably connected to the outside of the second connecting plate (5). The eccentric wheel (13) works with the pulley (12). A pressure detector is installed at the air source connection of the double-acting cylinder (16).

2. The weighing device using cylinder pressure to resist impact as described in claim 1, characterized in that: The sleeve (8) has a groove (17) on its outer side. A rotating rod (18) is rotatably connected between the two L support plates (2). A toggle rod (19) is fixedly connected to the outer side of the rotating rod (18). One end of the toggle rod (19) passes through the groove (17) and is fixedly connected to the pressure rod (9).

3. The weighing device using cylinder pressure to resist impact as described in claim 1, characterized in that: A speed reducer (14) is installed on the side of the second connecting plate (5) away from the eccentric wheel (13). The output shaft of the speed reducer (14) is fixedly connected to the eccentric wheel (13). A servo motor (15) is installed on the outside of the speed reducer (14). The output shaft of the servo motor (15) is installed and connected to the speed reducer (14).

4. A weighing device using cylinder pressure to resist impact as described in claim 1, characterized in that: Support rods (6) are installed and connected at the four corners of the bottom of the fixed plate (1). A base plate (7) is fixedly connected between the bottoms of the four support rods (6). The piston rod at the bottom of the bidirectional cylinder (16) extends to the top of the base plate (7) and is threaded with an adjusting cap (20) at equal intervals on the outside.

5. A weighing device using cylinder pressure to resist impact as described in claim 2, characterized in that: The outer side of the fixed plate (1) is provided with a through groove (23). The top of the actuating rod (19) is fixedly connected to the first connecting plate (3) with a spring (21). The two sides of the actuating rod (19) are rotatably connected with connecting rods (22). The bottom of the connecting rods (22) passes through the through groove (23) and is rotatably connected with a pedal (24). The pedal (24) is rotatably connected to the base plate (7).

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