A bench work teaching apparatus

Abstract

The utility model relates to the technical field of bench work, in the prior art chain saw can only carry out dust removal cooling, cannot solve the technical problem that traditional butterfly bolt is easy to loosen after long time use, the utility model provides a bench work teaching equipment, including handle, bow, saw blade, the screw rod connected with saw blade, the nut of sleeve setting in the external screw rod still include: spray stability structure is located in handle and saw bow, is used for inhibiting dust and maintaining temperature, force transmission self -lock type limiting structure is located in the end of handle connected with saw blade, is used for preventing the nut loosening after long time use. The utility model not only can carry out dust removal cooling in the bench work sawing operation, but also can carry out the spacing to the nut, solved the problem that easy to loosen after long time use, and then avoided the saw blade fracture.

Description

Technical Field

[0001] This utility model relates to the field of fitter technology, and in particular to a fitter teaching device. Background Technology

[0002] Metalworking Practice (Metalworking Technology Practice) is an important practical course for mechanical and related majors. It aims to help students master basic metal processing techniques and cultivate engineering practice skills through hands-on experience. It covers various metal processing methods, including turning, fitting, welding, and CNC machine tools. Students are required to learn equipment operation, tool and fixture usage, and safety regulations.

[0003] Students frequently use saws during metalworking internships, but the following are the main problems with the sawing operations in metalworking internships: 1. Risk of saw blade breakage: Improper operation by students may cause the saw blade to overheat and break, potentially injuring the operator. 2. Dust hazards: Metal dust generated during sawing poses a health threat to patients with respiratory diseases (asthma / rhinitis); 3. Loosening of equipment: Traditional butterfly bolts are prone to loosening after long-term use, resulting in insufficient tension of the saw blade and breakage.

[0004] Utility model CN ​​222135256 U discloses a lightweight lithium-ion battery chainsaw, including a cutting assembly. The cutting assembly includes a housing with a mounting groove on one side. A brushless motor is mounted on the inner wall of the housing, with one end of the brushless motor connected to a connecting shaft. One end of the connecting shaft rotatably passes through the housing, and a drive gear is detachably mounted on the other end of the connecting shaft. The drive gear is located within the mounting groove. A fixing frame is fixedly mounted on the inner wall of one side of the mounting groove by welding. Two sets of fixing frames are provided, and a guide plate is detachably mounted on the fixing frame. One end of the guide plate has an opening adapted to the fixing frame. A saw blade is rotatably mounted on the outer wall of the guide plate, with one end of the saw blade connected to the drive gear. A control handle is connected to one side of the housing, and a start button is provided on one side of the control handle. A grip is fixedly mounted on the outer wall of one side of the housing by bolts, and a cover plate is fixedly mounted on the outer wall of one side of the housing by bolts. The cover plate is adapted to the mounting groove. A spray assembly for dust removal and cooling is connected to one side of the housing.

[0005] However, the chainsaw in this application can only remove dust and cool down, and cannot solve the problem that traditional butterfly bolts are prone to loosening after long-term use, which may cause the saw blade to break. Summary of the Invention

[0006] To address the aforementioned problems, this utility model aims to provide a fitter's teaching equipment. By setting up a spray stabilization structure and a force transmission self-locking limiting structure, it can not only remove dust and cool down during fitter's sawing operations, but also limit the nuts, solving the problem of easy loosening after long-term use, and thus preventing saw blade breakage.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A fitter's teaching device includes a handle, a saw bow, a saw blade, a screw connected to the saw blade, a nut fitted onto the outside of the screw, and further includes: The spray stabilization structure, located on the handle and saw bow, is used to suppress dust and maintain temperature. A force-transmitting self-locking limiting structure is located at the end where the saw blade connects to the handle to prevent the nut from loosening after prolonged use.

[0008] Furthermore, the spray stabilization structure includes: The liquid reservoir is located inside the handle and connected to the saw bow; The spray assembly is located inside the saw bow and is connected to the liquid storage assembly.

[0009] Furthermore, the liquid storage assembly includes: The liquid storage chamber, located above the handle, is connected to the spray assembly; The drive unit, located inside the handle, is connected to the liquid reservoir.

[0010] Furthermore, the force-transmitting self-locking limiting structure includes: The clamping assembly, located inside the screw, is used to limit the position of the nut; The push-pull assembly is fitted inside the screw and connected to the tightening assembly.

[0011] Furthermore, the push-pull assembly includes: The movable block is fitted inside the screw and connected to the clamping assembly; The lifting sleeve is fitted outside the moving block and located inside the screw, and is connected to the tightening assembly.

[0012] Furthermore, the clamping components include: Two slots are symmetrically opened on both sides of the screw; The central shaft is located inside the screw, with one end connected to the screw and the other end connected to the moving block; A sliding limiter, sleeved on the central shaft, is used to limit the movement of the nut.

[0013] Furthermore, the sliding limit component includes: The movable ring is fitted onto the central shaft and connected to the lifting sleeve; The spring is connected at one end to the movable ring and at the other end to the moving block; The four-bar linkage has one end connected to the central axis and the other end connected to the movable ring. Two limiting blocks are symmetrically arranged on both sides of the central axis and are respectively fitted into two slots.

[0014] Compared with the prior art, the beneficial effects of this utility model are: The spray stabilization structure driven by a micro air pump achieves full coverage of the atomized water curtain in the sawing area, improves the efficiency of metal powder settling, effectively reduces PM2.5 concentration, and significantly improves the operating environment.

[0015] The spray stabilization structure simultaneously reduces the frictional heat of the saw blade, keeping the working area temperature stable between 25-35℃, avoiding the overheating and deformation problems caused by traditional dry sawing, and extending the saw blade life.

[0016] The force-transmitting self-locking limiting structure utilizes spring force and a four-bar linkage to create a self-locking effect, automatically generating a continuous tightening force after the nut is pre-tightened. When the lifting sleeve triggers the limiting ball, the moving ring drives the symmetrically distributed limiting blocks to expand outward, forming a rigid constraint on the nut; simultaneously, the elastic potential energy provided by the compression spring serves as a secondary safeguard, ensuring the system maintains a stable locking force even under vibration conditions. Furthermore, the dynamic tightening function of the force-transmitting self-locking limiting structure reduces the risk of saw blade breakage, making it particularly suitable for high-intensity continuous operation scenarios. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0018] Figure 2 This utility model Figure 1 Enlarged schematic diagram of part A in the diagram.

[0019] Figure 3 This is a front view of the overall structure of this utility model.

[0020] Figure 4 This is a top view of the overall structure of this utility model.

[0021] Figure 5 This utility model Figure 4 A sectional view along the AA direction.

[0022] Figure 6 This is a side view of the overall structure of this utility model.

[0023] Figure 7 This utility model Figure 6 CC-direction sectional view.

[0024] Figure 8 This utility model Figure 7 Enlarged schematic diagram of part B in the diagram.

[0025] The components are: 1. Handle, 2. Saw bow, 3. Saw blade, 4. Liquid storage chamber, 5. Spray hole, 6. Connecting pipe, 7. Miniature air pump, 8. Screw, 9. Nut, 10. Moving block, 11. Long rod, 12. Short rod, 13. Limiting block, 14. Moving ring, 15. Spring, 16. Lifting sleeve, 17. Limiting ball, 18. Central shaft, 19. Groove. Detailed Implementation

[0026] To enable those skilled in the art to better understand the technical solution of this utility model, the technical solution of this utility model will be further described below in conjunction with the accompanying drawings and embodiments.

[0027] Please see Figures 1-8 This application discloses a fitter's teaching equipment, including a handle 1, a saw bow 2, and a saw blade 3. The saw blade 3 is fixedly disposed between the saw bow 2, and one end of the saw blade 3 is locked by a screw 6 and a nut 9, so that the saw blade 3 maintains tension and is easy to use. It should be noted that the handle 1 and the saw bow 2 in this application are made of hard plastic or wood, and the saw blade 3 is made of stainless steel. It also includes: a spray stabilization structure, which is disposed on the handle 1 and the saw bow 2 to suppress dust and maintain temperature; and a force transmission self-locking limiting structure, which is disposed at the end where the saw blade 3 is connected to the handle 1 to prevent the saw blade 3 from breaking.

[0028] The spray stabilization structure includes: a liquid storage component, located inside the handle 1 and connected to the saw bow 2; and a spray component, located inside the saw bow 2 and connected to the liquid storage component.

[0029] Specifically, the liquid storage assembly includes: a liquid storage chamber 4, located above the handle 1 and connected to the spray assembly; and a drive unit, located inside the handle 1 and connected to the liquid storage chamber 4. The liquid storage chamber 4 is specifically a spray bottle with its opening facing downwards, and is connected to both the spray assembly and the drive unit. The drive unit is specifically a miniature air pump 7. The output end of the miniature air pump 7 is connected to the spray hole 5 via a connecting pipe 6, and the operation button of the miniature air pump 7 is located at the bottom of the handle 1 for easy operation. The spraying assembly includes multiple spray holes 5 evenly distributed inside the saw bow 2. Each spray hole 5 is connected to the liquid storage chamber 4 and the micro air pump 7 through a connecting pipe 6. Each spray hole 5 is equipped with an atomizing nozzle, which can form a uniform spray in the working area of ​​the saw blade 3.

[0030] When in use, the operation button can be activated to pump water from the spray bottle into the connecting pipe 6 via the micro air pump 7. The water then enters the two rows of spray holes 5 on the saw frame 2 through the connecting pipe 6. Since the opening direction of the spray holes 5 is directly above the saw blade 3, the water sprayed from the spray holes 5 can form a uniform spray in the working area of ​​the saw blade 3, which facilitates the settling of metal powder generated during sawing and can prevent metal powder from posing a health threat to patients with respiratory diseases.

[0031] Because traditional butterfly bolts are prone to loosening after prolonged use, leading to insufficient tension in the saw blade and subsequent breakage, this application also includes a force transmission self-locking limiting structure to limit the bolt and prevent it from loosening after prolonged use. Specifically, the force transmission self-locking limiting structure includes: a tightening component, located inside the screw 8, used to limit the nut 9; and a push-pull component, sleeved inside the screw 8 and connected to the tightening component.

[0032] The push-pull assembly includes: a movable block 10, which is sleeved inside the screw 8 and connected to the tightening assembly; and a lifting sleeve 16, which is sleeved outside the movable block 10 and located inside the screw 8, and connected to the tightening assembly.

[0033] It should be noted that there is also a limiting ball 17 on the outside of the lifting sleeve 16. The limiting ball 17 penetrates the outer wall of the lifting sleeve 16 and is used to limit the moving block 10. When the moving block 10 moves to the required position, the limiting ball 17 can be pressed to make the limiting ball 17 press against the moving block 10, thereby preventing the moving block 10 from stopping.

[0034] To further reinforce the push-pull assembly and prevent it from loosening during use, this application provides a tightening component. Specifically, the tightening component includes: two slots 19 symmetrically located on both sides of the screw 8; a central shaft 18 located inside the screw 8, with one end connected to the screw 8 and the other end connected to the moving block 10; and a sliding limiter sleeved on the central shaft 18 for limiting the nut 9.

[0035] The sliding limiting component includes: a movable ring 14, which is sleeved on the central shaft 18 and fixedly connected to the lifting sleeve 16; two inverted L-shaped rods extending from both sides of the movable ring 14 are welded and fixedly connected to the edges of the lifting sleeve 16, so that the lifting sleeve 16 can move synchronously with the movable ring 14; a spring 15, one end of which is connected to the movable ring 14 and the other end of which is connected to the moving block 10; a four-bar linkage, one end of which is connected to the central shaft 18 and the other end of which is connected to the movable ring 14; and two limiting blocks 13, which are symmetrically arranged on both sides of the central shaft 18 and respectively sleeved in two slots 19.

[0036] It should be noted that the four-bar linkage includes two symmetrically arranged links. Each link includes a long rod 11 and a short rod 12 that are hinged together. One end of each of the two short rods 12 is hinged to a fixed block sleeved on the central shaft 18, and the fixed block is welded to the central shaft 18 for fixed connection. One end of each of the two long rods 11 is fixedly connected to a movable ring 14 sleeved on the central shaft 18, which can be fixed by bolts. The hinge joints of the two long rods 11 and the two short rods 12 are respectively fitted into two limiting blocks 13. Each limiting block 13 has a limiting groove for limiting the long rods 11 and the short rods 12. When it is necessary to tighten the nut 9, simply release the limiting ball 17 from the moving block 10 and the lifting sleeve 16, allowing the lifting sleeve 16 to move inside the screw 8. Here, we will use upward movement for tightening and downward movement for loosening as an example. When the lifting sleeve 16 moves upward inside the screw 8, it will drive the connected movable ring 14 upward. At this time, the spring 15 is in a compressed state. When the movable ring 14 moves upward, since the fixed block remains stationary, it will... The connecting rods located on both sides of the central shaft 18 are compressed, causing the hinge joints of the two connecting rods to move toward the slots 19 on both sides of the screw 8. Since the two connecting rods are respectively fitted into the two limiting blocks 13, the two connecting rods will drive the two limiting blocks 13 to move toward the slots 19 on both sides. When the limiting blocks 13 can no longer move, it means that the limiting blocks 13 have tightened the nut 9. At this time, press the limiting ball 17 to limit the lifting sleeve 16 and the moving block 10. Under the dual action of the elastic force of the spring 15 and the limiting ball 17, the two limiting blocks 13 continue to tighten the nut 9, thereby preventing the nut 9 from loosening during use.

[0037] When it is necessary to remove the limit on nut 9, simply remove the limit ball 17 from the lifting sleeve 16 and the moving block 10, and then pull the lifting sleeve 16 downward. Under the combined action of the elastic force of spring 15 and the downward pulling force, the hinge of the two connecting rods will retract inward, thereby driving the limit block 13 to move into the screw 8, so that the limit block 13 can release the tightening of nut 9. Example

[0038] Metalworking internship: Fitter sawing operation process: I. Preparations before operation Wear tight-fitting work clothes and protective glasses; long hair must be tied up and tucked into a work cap; check that the work surface is free of debris. Tool Preparation Choose a saw blade with appropriate tooth pitch; coarse-tooth saw blades are used for soft metals, and fine-tooth saw blades are used for hard materials. Install the saw blade: Insert the saw blade 3 with the teeth facing down into the saw bow 2. Adjust the screws 8 and nuts 9 at both ends until the saw blade 3 is taut and free from twisting. Then rotate the screws 8 to pre-tighten the nuts 9. Pull the lifting sleeve 16 upwards to compress the spring 15 and push the four-link rod to unfold. The limiting block 13 contacts the nuts 9 to generate a continuous tightening force.

[0039] II. Workpiece clamping Vise adjustment: Clean the jaws, remove metal filings, and adjust the width of the vise jaws to be slightly larger than the thickness of the workpiece; Workpiece fixing: The height of the workpiece extending out of the jaws should not exceed 2 / 3 of the jaw height. The vertical clamping force should prevent the workpiece from rotating but allow it to shake slightly. Important workpieces should be protected by copper pads. III. Saw Start Operation Initial positioning: The saw bow is at a 15° angle to the workpiece (near-start sawing method), and the thumb is placed on the edge of the workpiece as a guide; First sawing: Gently push the saw bow to form a 3-5mm deep saw mark. Be careful to keep the saw blade perpendicular to the workpiece. Apply no more than 1kg of pressure during the initial sawing stage. IV. Normal sawing The operator presses the button on the miniature air pump 7 at the bottom of the handle 1, driving the liquid in the spray bottle to be delivered to the inside of the saw blade 2 through the connecting pipe 6. This ensures that the atomizing nozzle forms water mist particles. Two rows of spray holes 5 spray towards the working area of ​​the saw blade 3, reducing the concentration of metal dust to meet OSHA respiratory safety standards.

[0040] End phase: Release the limiting ball 17, pull down the lifting sleeve 16 to release the tightening force, and the nut 9 can be freely adjusted.

[0041] After the miniature air pump 7 is turned off, the residual water mist is automatically discharged through the saw bow 2.

[0042] V. Post-operation processing Workpiece inspection: Use a 90° square to check the perpendicularity of the sawn surface; the measurement error should not exceed 0.2mm. Tool maintenance: Clean the metal shavings between the saw blade teeth, remove the saw blade and apply anti-rust oil, and check if the saw bow screws are loose; Precautions: Stop operation immediately if the saw blade breaks; if the workpiece is loose, it must be re-clamped before resuming operation; do not wear gloves when operating rotating equipment; clean up iron filings that accumulate to more than 5mm in time.

[0043] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A fitter's teaching equipment, comprising a handle (1), a saw bow (2), a saw blade (3), a screw (8) connected to the saw blade (3), and a nut (9) sleeved on the outside of the screw (8), characterized in that, Also includes: The spray stabilization structure is located on the handle (1) and the saw bow (2) to suppress dust and maintain temperature; A force transmission self-locking limiting structure is located at the end where the saw blade (3) connects to the handle (1) to prevent the nut from loosening after long-term use.

2. The fitter teaching equipment according to claim 1, characterized in that, The spray stabilization structure includes: The liquid storage assembly is located inside the handle (1) and connected to the saw bow (2); The spray assembly is located inside the saw bow (2) and is connected to the liquid storage assembly.

3. The fitter teaching equipment according to claim 2, characterized in that, The liquid storage assembly includes: The liquid storage chamber (4) is located above the handle (1) and is connected to the spray assembly; The drive unit is located inside the handle (1) and is connected to the liquid storage chamber (4).

4. The fitter teaching equipment according to claim 3, characterized in that, Force transmission self-locking limiting structure includes: A clamping assembly, located inside the screw (8), is used to limit the position of the nut (9); The push-pull assembly is fitted inside the screw (8) and connected to the tightening assembly.

5. A fitter teaching device according to claim 4, characterized in that, The push-pull assembly includes: The movable block (10) is fitted inside the screw (8) and connected to the clamping assembly; The lifting sleeve (16) is fitted outside the moving block (10) and located inside the screw (8), and is connected to the tightening assembly.

6. A fitter teaching device according to claim 5, characterized in that, The clamping assembly includes: Two slots (19) are symmetrically opened on both sides of the screw (8); The central shaft (18) is located inside the screw (8), with one end connected to the screw (8) and the other end connected to the moving block (10); A sliding limiter is sleeved on the central shaft (18) and is used to limit the nut (9).

7. A fitter teaching device according to claim 6, characterized in that, The sliding limit component includes: The movable ring (14) is fitted onto the central shaft (18) and connected to the lifting sleeve (16); The spring (15) is connected at one end to the movable ring (14) and at the other end to the moving block (10); The four-bar linkage has one end connected to the central axis (18) and the other end connected to the movable ring (14); Two limiting blocks (13) are symmetrically arranged on both sides of the central axis (18) and respectively fitted into two slots (19).

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