Novel energy-saving electric telescopic positioning pin

Abstract

The invention belongs to the technical field of positioning pins, and particularly relates to a novel energy-saving electric telescopic positioning pin which comprises a power supply component, a telescopic mechanism, a friction reduction assembly, a guide assembly and a displacement monitoring assembly. And a shell is mounted at the upper end of the mounting base. According to the invention, an intermediate control element pneumatic electromagnetic valve is not needed any more, so that the control structure is simplified, the element cost is greatly saved, and the response speed of a product is improved; the low-efficiency mode that electric energy generates compressed air through an air compressor and then the compressed air is converted into mechanical energy through an air cylinder is changed into the high-efficiency mode that the electric energy is directly converted into the mechanical energy, the electric energy is directly converted into the mechanical energy, the energy conversion efficiency is improved, energy consumption is reduced, and the production cost is reduced. Unsafe uncontrollable actions are reduced, and the workpiece positioning accuracy and the safety of operators are ensured.

Description

Technical Field

[0001] The invention belongs to the technical field of positioning pins, and in particular relates to a novel energy-saving electric telescopic positioning pin. Background Art

[0002] Before welding, the sheet metal materials of automobile body-in-white welding lines, sheet metal parts welding lines, and battery pack boxes must be positioned by tooling. One method is to use telescopic positioning pins to match the positioning holes on the workpiece material to position the workpiece to be welded, and then the welding process is carried out to ensure the position and dimensional accuracy of the welded components.

[0003] The telescopic positioning pins currently used in the market are mainly divided into two types: manual and pneumatic. Manual telescopic positioning pins are mainly used in manual production stations with low production cycles, while pneumatic telescopic positioning pins (see Figure 7 As shown in the figure, it is mainly used in automated production lines or workstations with high production rhythm.

[0004] At present, in the automated production line, the composition and control principle of the production line using pneumatic telescopic positioning pins are as follows (see Figure 8 PLC (Logic Control) controls the pneumatic solenoid valve (the automotive industry usually uses pneumatic solenoid valve islands - see Fig. 9 The coil (as shown) works to change the path of the air circuit, thereby changing the direction of action of the cylinder with the pneumatic telescopic positioning pin as the driving force to achieve the position state of the telescopic positioning pin (extended positioning or retracted state). The power source of the telescopic positioning pin cylinder comes from the compressed air provided by the air compressor (see Fig.10 as shown).

[0005] For example, the Chinese patent announcement number CN201900432U discloses a pneumatic propulsion device for the locating pin of a car body welding fixture. After the cylinder is connected to the air source, the locating pin is driven by the cylinder transmission rod to pass through the connecting plate and the shaft sleeve and into the reserved locating hole on the stamping part. Another example is the Chinese patent announcement number CN106392440B, which discloses a pneumatic positioning locking pin hook mechanism, which uses the cylinder air supply to push the pin for locking.

[0006] Such pneumatic telescopic locating pins, according to the current status of using pneumatic telescopic locating pins in automation lines, have complex and costly air supply systems, high-cost pneumatic solenoid valves, and compressed air is converted into mechanical energy through cylinders. During the transmission of compressed air in the air path, there will be energy losses such as pressure drop and leakage, resulting in low efficiency of energy conversion, which leads to high production costs. When the air pipe of the pneumatic telescopic locating pin with the cylinder as the driving force source accidentally falls off or ruptures, the pneumatic telescopic locating pin will have uncontrollable movements under the load gravity, reverse force or external force, resulting in the inability to maintain the position and the loss of power, resulting in unsafe problems such as inaccurate positioning or falling of the workpiece. Summary of the invention

[0007] The purpose of the present invention is to provide a new type of energy-saving electric telescopic positioning pin, which can directly convert electrical energy into mechanical energy, improve energy conversion efficiency, reduce energy consumption, reduce production costs, reduce unsafe and uncontrollable actions, and ensure the accuracy of workpiece positioning and the safety of operators.

[0008] The technical solution adopted by the present invention is as follows: A novel energy-saving electric telescopic positioning pin comprises a power supply component, a telescopic mechanism, a friction reduction component, a guide component and a displacement monitoring component, wherein a mounting base is mounted on the upper part of the power supply component, a shell is mounted on the upper end of the mounting base, a telescopic pin is arranged inside the shell, the telescopic mechanism is mounted inside the telescopic pin, the telescopic mechanism is connected to the output end of the power supply component, the friction reduction component is mounted between the shell and the telescopic mechanism, the guide component is mounted inside the shell and located outside the telescopic pin, the displacement monitoring component is mounted on one side of the shell, a sensor assembly is mounted outside the power supply component, and the sensor assembly is connected to the displacement monitoring component; Among them, when the power providing component drives the telescopic mechanism to operate and drives the telescopic pin to move inside the shell, the friction between the shell and the telescopic mechanism is reduced by the friction reduction component, and the moving direction of the telescopic pin is limited by the guide component, and the moving distance of the telescopic pin is detected by the displacement monitoring component.

[0009] In a preferred solution, a copper sleeve is installed inside the upper end of the shell and outside the telescopic pin.

[0010] In a preferred solution, a dustproof sealing ring is installed inside the upper end of the shell and above the copper sleeve, and the dustproof sealing ring is slidably connected to the telescopic pin rod.

[0011] In a preferred embodiment, the telescopic mechanism includes a nut and a trapezoidal screw, the trapezoidal screw is arranged inside the telescopic pin, the lower end of the trapezoidal screw is fixedly connected to the output end of the power providing component, the nut is threadedly connected to the outside of the trapezoidal screw, and the nut is located inside the telescopic pin.

[0012] In a preferred embodiment, the trapezoidal lead screw is made of alloy steel.

[0013] In a preferred embodiment, the friction reduction component includes a bearing seat and an angular contact ball bearing, the bearing seat is installed inside the lower end of the shell, the angular contact ball bearing is sleeved on the outer side of the lower end of the trapezoidal screw, and the angular contact ball bearing is installed inside the bearing seat.

[0014] In a preferred embodiment, the guide assembly includes an open guide sleeve and a limiting member, wherein the open guide sleeve is installed inside the shell and located above the bearing seat, a slide groove is provided on one side of the open guide sleeve, and the limiting member is installed on the outside of the telescopic pin and inside the slide groove.

[0015] In a preferred embodiment, the limiting member includes a limit block and a guide roller, wherein the guide roller is installed at the lower part of the outer side of the telescopic pin and located inside the slide groove, and the limit block is installed at the outer side of the guide roller and located inside the slide groove.

[0016] In a preferred embodiment, the displacement monitoring component includes an extended position sensor probe and a sensor bracket, wherein the sensor bracket is fixed on the outside of the shell, and the extended position sensor probe is fixed on one side of the sensor bracket and close to the limit block, and the extended position sensor probe is electrically connected to the sensor assembly.

[0017] In a preferred solution, a detection rod is installed on a side of the limit block close to the extension position sensor probe.

[0018] The technical effects achieved by the present invention are: The present invention no longer requires an intermediate control element, a pneumatic solenoid valve, thereby simplifying the control structure, greatly saving the cost of components, and improving the response speed of the product. The energy conversion mode is changed from an inefficient mode in which electrical energy is converted into compressed air through an air compressor and then the compressed air is converted into mechanical energy through a cylinder to an efficient mode in which electrical energy is directly converted into mechanical energy. Electrical energy is directly converted into mechanical energy, thereby improving energy conversion efficiency, reducing energy consumption, reducing production costs, reducing unsafe and uncontrollable actions, and ensuring the accuracy of workpiece positioning and the safety of operators. The self-locking property of the trapezoidal screw rod adopted by the present invention can ensure that the mechanism can still maintain the clamping position unchanged even when the power is off, which can fully ensure the safety after abnormal power failure during operation. In addition, the self-locking property of the trapezoidal screw rod can be utilized, and the motor only needs a small holding power supply after reaching the position to further reduce energy consumption; The present invention adopts a programmable stepping motor to achieve lightweight and meet the requirements of flexible control, and can be widely used in applications with different extension strokes; The present invention adopts a trapezoidal screw as an output transmission mechanism, thereby cooperating with a low-voltage and low-power motor as a main power source, so as to adapt to power sources of different powers, improve adaptability, and meet positioning requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a partial cross-sectional view of the present invention; Figure 3It is a sectional view of the main part of the present invention Figure 4 is an exploded view of the present invention; Figure 5 It is a structural schematic diagram of the extended position sensor probe of the present invention installed on the sensor bracket; Figure 6 This is a control principle diagram of the electric telescopic positioning pin of the present invention; Figure 7 It is a working schematic diagram of a pneumatic telescopic positioning pin in the prior art; Figure 8 It is a control principle diagram of pneumatic telescopic positioning pin in the prior art; Fig. 9 It is a pneumatic solenoid valve island in the prior art; Fig.10 The utility model relates to a compressed air supply system in the prior art.

[0020] In the accompanying drawings, the names of the components represented by the reference numerals are as follows: 1. Power supply component; 2. Mounting base; 3. Shell; 4. Bearing seat; 5. Angular contact ball bearing; 6. Open guide sleeve; 7. Telescopic pin; 8. Nut; 9. Copper sleeve; 10. Dustproof seal; 11. Trapezoidal screw; 12. Extended position sensor probe; 13. Limit block; 14. Guide roller; 15. Sensor bracket; 16. Sensor assembly; 17. Probe rod. DETAILED DESCRIPTION

[0021] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0022] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0023] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. The phrase "in a preferred embodiment" that appears in different places in this specification does not refer to the same embodiment, nor is it a separate or selective embodiment that is mutually exclusive with other embodiments.

[0024] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0025] Please see attached Figures 1 to 6 As shown, a novel energy-saving electric telescopic positioning pin is provided, comprising a power supply component 1, a telescopic mechanism, a friction reduction component, a guide component and a displacement monitoring component. A mounting base 2 is mounted on the upper part of the power supply component 1, a housing 3 is mounted on the upper end of the mounting base 2, a telescopic pin 7 is arranged inside the housing 3, the telescopic mechanism is mounted inside the telescopic pin 7, the telescopic mechanism is connected to the output end of the power supply component 1, the friction reduction component is mounted between the housing 3 and the telescopic mechanism, the guide component is mounted inside the housing 3 and located outside the telescopic pin 7, the displacement monitoring component is mounted on one side of the housing 3, a sensor assembly 16 is mounted on the outside of the power supply component 1, and the sensor assembly 16 is connected to the displacement monitoring component; Among them, when the power providing component 1 drives the telescopic mechanism to operate and drives the telescopic pin rod 7 to move inside the shell 3, the friction between the shell 3 and the telescopic mechanism is reduced by the friction reduction component, and the moving direction of the telescopic pin rod 7 is limited by the guide component, and the moving distance of the telescopic pin rod 7 is detected by the displacement monitoring component.

[0026] Specifically, when the telescopic pin 7 is moved out from the interior of the shell 3 to position the workpiece, the power providing component 1 is started, so that the power providing component 1 drives the telescopic mechanism to operate, which will drive the telescopic pin 7 to limit the moving direction of the telescopic pin 7 through the guide component, so that the telescopic pin 7 is moved out from the interior of the shell 3. At the same time, the friction between the telescopic mechanism and the shell 3 is reduced by the friction reduction component, and the moving distance of the telescopic pin 7 is detected by the displacement monitoring component and transmitted to the interior of the sensor assembly 16, and the operation of the power providing component 1 is controlled, thereby controlling the moving position of the telescopic pin 7.

[0027] It should be noted that the power supply component 1 is a stepper motor, which is connected to the PLC control system for precise control. It can achieve lightweight size while meeting the requirements of flexible control. It can be used for applications with different extension strokes. For example, within a stroke of 60 mm, the extension stroke, operating speed, start and stop acceleration and deceleration can all be set within the stroke range of the mechanical design to achieve fully flexible application. The stepper motor can be low-voltage and low-power. Of course, in other embodiments, the power supply component 1 can also be an electric or various forms of cylinder or rotary power devices.

[0028] It is worth mentioning that a copper sleeve 9 is installed inside the upper end of the shell 3 and on the outside of the telescopic pin 7 to protect the upper end of the shell 3 and the telescopic pin 7. A dustproof sealing ring 10 is installed inside the upper end of the shell 3 and above the copper sleeve 9. The dustproof sealing ring 10 is slidably connected to the telescopic pin 7 for dustproof treatment to prevent dust and impurities from entering the interior of the shell 3 through the gap between the shell 3 and the telescopic pin 7.

[0029] In a preferred embodiment, please refer to Figures 2 to 4 The telescopic mechanism includes a nut 8 and a trapezoidal screw rod 11. The trapezoidal screw rod 11 is arranged inside the telescopic pin rod 7. The lower end of the trapezoidal screw rod 11 is fixedly connected to the output end of the power providing component 1. The nut 8 is threadedly connected to the outside of the trapezoidal screw rod 11, and the nut 8 is located inside the telescopic pin rod 7.

[0030] It should be noted that the material of the trapezoidal lead screw 11 is alloy steel, and the surface is heat treated, and a grinding process is used to minimize the friction coefficient and enhance the wear resistance of the trapezoidal lead screw 11, thereby enhancing the service life. The trapezoidal lead screw 11 is used as the output transmission mechanism, so as to cooperate with a low-voltage and low-power motor as the main power source to achieve adaptation to power sources of different power, improve adaptability, meet positioning requirements, and utilize the self-locking characteristics of the trapezoidal lead screw 11, so that the mechanism can still maintain the clamping position unchanged even in the event of a power outage, and can fully guarantee the safety after an abnormal power outage during operation. After reaching the position, the motor only needs a small amount of power to maintain the power supply to further reduce energy consumption, ensuring that the electric telescopic positioning pin can achieve mechanical self-locking in any position, thereby ensuring that no accidents will occur due to accidental interruptions in the air source or electrical energy, thereby ensuring the safety of the mechanism.

[0031] It is worth mentioning that the friction reduction component includes a bearing seat 4 and an angular contact ball bearing 5. The bearing seat 4 is installed inside the lower end of the housing 3, and the angular contact ball bearing 5 is sleeved on the outer side of the lower end of the trapezoidal screw 11. The angular contact ball bearing 5 is installed inside the bearing seat 4. When the trapezoidal screw 11 rotates, the angular contact ball bearing 5 can simultaneously bear radial load and axial load, can work at a higher speed, reduce friction, and improve service life.

[0032] Next, please refer to Figures 2 to 4 The guide assembly includes an open guide sleeve 6 and a limiting member. The open guide sleeve 6 is installed inside the shell 3 and is located above the bearing seat 4. A slide groove is opened on one side of the open guide sleeve 6. The limiting member is installed on the outside of the telescopic pin rod 7 and is connected to the inside of the slide groove.

[0033] Wherein, through the cooperation between the open guide sleeve 6 and the copper sleeve 9, the accuracy of the telescopic pin rod 7 in the X and Y directions can be improved when the telescopic pin rod 7 moves.

[0034] It should be noted that the limiting member includes a limit block 13 and a guide roller 14. The guide roller 14 is installed at the lower part of the outer side of the telescopic pin 7 and is located inside the slide groove. The limit block 13 is installed at the outer side of the guide roller 14 and is located inside the slide groove.

[0035] Secondly, please also refer to Figures 2 to 5 The displacement monitoring component includes an extended position sensor probe 12 and a sensor bracket 15. The sensor bracket 15 is fixed to the outside of the shell 3. The extended position sensor probe 12 is fixed to one side of the sensor bracket 15 and close to the position of the limit block 13. The extended position sensor probe 12 is electrically connected to the sensor assembly 16.

[0036] It should be noted that a detection rod 17 is installed on the side of the limit block 13 close to the extension position sensor probe 12, which can drive the detection rod 17 to move with the limit block 13 when it moves, so that the extension position sensor probe 12 detects the detection rod 17 to identify the moving distance of the limit block 13.

[0037] In this embodiment, when the telescopic pin 7 is extended from the inside of the housing 3, the power supply component 1 is started, which will drive the trapezoidal screw 11 to rotate. Since the nut 8 is threadedly connected to the trapezoidal screw 11, the nut 8 is located inside the telescopic pin 7, the guide roller 14 is installed on the telescopic pin 7, and the limit block 13 is installed on the outside of the guide roller 14. The limit block 13 is located inside the slide groove of the open guide sleeve 6, so that the limit block 13 and the guide roller 14 move inside the slide groove to drive the telescopic pin 7 to make a linear motion in the open guide sleeve 6 and the copper sleeve 9, so that the telescopic pin 7 is extended or retracted from the inside of the housing 3. When the limit block When 13 moves inside the open guide sleeve 6, it will drive the detection rod 17 to move along, and the position of the detection rod 17 is detected by the extended position sensor probe 12, which is then used to determine the moving distance of the telescopic pin 7. The self-locking property of the trapezoidal screw 11 can ensure that the electric telescopic positioning pin can maintain its clamping working position even when the power is off. The forward and reverse pulses set by the controller can control the number of rotations of the working output of the stepping motor to control the forward and reverse travel distance of the trapezoidal screw 11, thereby realizing the control of the extension and retraction stroke of the telescopic pin 7, so as to adapt to different work application scenarios and meet flexible production.

[0038] The working principle of the present invention is as follows: when the telescopic pin 7 is moved out from the inside of the shell 3 to position the workpiece, the power supply component 1 is started, so that the power supply component 1 drives the telescopic mechanism to operate, and the telescopic pin 7 is driven to limit the moving direction of the telescopic pin 7 through the guide component, so that the telescopic pin 7 is moved out from the inside of the shell 3. At the same time, the friction between the telescopic mechanism and the shell 3 is reduced by the friction reduction component, and the moving distance of the telescopic pin 7 is detected by the displacement monitoring component, which is transmitted to the inside of the sensor assembly 16, and the operation of the power supply component 1 is controlled, thereby controlling the moving position of the telescopic pin 7. The intermediate control element pneumatic solenoid valve is no longer required, thereby simplifying the control structure, greatly saving component costs, and improving the response speed of the product. The energy conversion mode is changed from the inefficient mode of electric energy generating compressed air through an air compressor and then the compressed air is converted into mechanical energy through a cylinder to the efficient mode of direct conversion of electric energy into mechanical energy, directly converting electric energy into mechanical energy, improving energy conversion efficiency, reducing energy consumption, reducing production costs, reducing unsafe and uncontrollable actions, and ensuring the accuracy of workpiece positioning and the safety of operators.

[0039] The above is only a preferred embodiment of the present invention. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principles of the present invention, and these improvements and modifications should also be considered as the protection scope of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention shall be implemented according to the conventional means in the art unless otherwise specified and limited.

Claims

1. A new energy-saving electric telescopic positioning pin, characterized in that: The invention comprises a power supply component (1), a telescopic mechanism, a friction reduction component, a guide component and a displacement monitoring component, wherein a mounting base (2) is mounted on the upper part of the power supply component (1), a housing (3) is mounted on the upper end of the mounting base (2), a telescopic pin (7) is arranged inside the housing (3), the telescopic mechanism is mounted inside the telescopic pin (7), the telescopic mechanism is connected to the output end of the power supply component (1), the friction reduction component is mounted between the housing (3) and the telescopic mechanism, the guide component is mounted inside the housing (3) and located outside the telescopic pin (7), the displacement monitoring component is mounted on one side of the housing (3), a sensor assembly (16) is mounted on the outside of the power supply component (1), and the sensor assembly (16) is connected to the displacement monitoring component; When the power supply component (1) drives the telescopic mechanism to operate and drives the telescopic pin (7) to move inside the housing (3), the friction between the housing (3) and the telescopic mechanism is reduced by the friction reduction component, while the moving direction of the telescopic pin (7) is limited by the guide component, and the moving distance of the telescopic pin (7) is detected by the displacement monitoring component.

2. The new energy-saving electric telescopic positioning pin according to claim 1 is characterized in that: A copper sleeve (9) is installed inside the upper end of the housing (3) and outside the telescopic pin (7).

3. The new energy-saving electric telescopic positioning pin according to claim 2 is characterized in that: A dustproof sealing ring (10) is installed inside the upper end of the housing (3) and above the copper sleeve (9). The dustproof sealing ring (10) is slidably connected to the telescopic pin (7).

4. The new energy-saving electric telescopic positioning pin according to claim 1 is characterized in that: The telescopic mechanism comprises a nut (8) and a trapezoidal screw rod (11); the trapezoidal screw rod (11) is arranged inside the telescopic pin rod (7); the lower end of the trapezoidal screw rod (11) is fixedly connected to the output end of the power supply component (1); the nut (8) is threadedly connected to the outside of the trapezoidal screw rod (11), and the nut (8) is located inside the telescopic pin rod (7).

5. The new energy-saving electric telescopic positioning pin according to claim 4 is characterized in that: The trapezoidal lead screw (11) is made of alloy steel.

6. The new energy-saving electric telescopic positioning pin according to claim 4 is characterized in that: The friction reduction component comprises a bearing seat (4) and an angular contact ball bearing (5), wherein the bearing seat (4) is mounted inside the lower end of the housing (3), the angular contact ball bearing (5) is sleeved on the outer side of the lower end of the trapezoidal lead screw (11), and the angular contact ball bearing (5) is mounted inside the bearing seat (4).

7. The new energy-saving electric telescopic positioning pin according to claim 6 is characterized in that: The guide assembly comprises an open guide sleeve (6) and a limiting member, the open guide sleeve (6) being mounted inside the housing (3) and located above the bearing seat (4), a slide groove being provided on one side of the open guide sleeve (6), and the limiting member being mounted on the outside of the telescopic pin rod (7) and inside the slide groove.

8. The novel energy-saving electric telescopic positioning pin according to claim 7 is characterized in that: The limiting member comprises a limiting block (13) and a guide roller (14); the guide roller (14) is mounted on the lower part of the outer side of the telescopic pin (7) and is located inside the slide groove; the limiting block (13) is mounted on the outer side of the guide roller (14) and is located inside the slide groove.

9. The novel energy-saving electric telescopic positioning pin according to claim 8, characterized in that: The displacement monitoring assembly comprises an extended position sensor probe (12) and a sensor bracket (15), wherein the sensor bracket (15) is fixed to the outside of the housing (3), the extended position sensor probe (12) is fixed to one side of the sensor bracket (15) and at a position close to the limit block (13), and the extended position sensor probe (12) is electrically connected to the sensor assembly (16).

10. The novel energy-saving electric telescopic positioning pin according to claim 9, characterized in that: A detection rod (17) is installed on one side of the limit block (13) close to the extension position sensor probe (12).

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