A hand-cranked grinding wheel device

Abstract

The utility model discloses a hand-cranked grinding wheel device, which is characterized in that it comprises a base, a mounting shell is arranged on the base, a driving shaft and a driven shaft are arranged in the mounting shell, the driving shaft and the driven shaft are connected through a gear transmission mechanism, a crank is arranged at one end of the driving shaft, a grinding wheel is installed at one end of the driven shaft, and the crank and the grinding wheel are respectively located on two sides of the mounting shell, a mounting rod is arranged on the mounting shell, a retaining frame is movably arranged on the mounting rod, and the retaining frame comprises a U-shaped placing table which is clearance matched with the outer edge of the grinding wheel and a V-shaped placing table which is clearance matched with one side of the grinding wheel; the mounting rod and the retaining frame of the scheme can be adjusted to the corresponding position according to the size of the grinding wheel, so that the retaining frame can be adapted to grinding wheels of different sizes, and it has strong practicality; at the same time, the U-shaped placing table and the V-shaped placing table on the retaining frame can assist in limiting the workpiece and selectively contact and grind with the peripheral wall and side wall of the grinding wheel, thereby enhancing the stability of workpiece grinding.

Description

Technical Field

[0001] The utility model relates to the technical field of grinding wheels, in particular to a hand-cranked grinding wheel device. Background Art

[0002] With the advancement of science and technology, people nowadays use machinery very commonly. Now in the mechanized era, various machines drive the progress of society, and small machines have also entered people's lives. With the wear of workpieces, hand-cranked grinders have begun to come into people's sight, bringing great convenience to our lives. When using a hand-cranked grinder, the operator needs to manually crank the handle while placing the tool on the grinding wheel for grinding; however, the existing hand-cranked grinder has a simple structure, and the mounting holder structure that cooperates with the grinding wheel and is used to assist in limiting and fixing the workpiece is fixed, and cannot cooperate with grinding wheels of different sizes, which limits the grinding function; at the same time, when grinding, the crank handle needs to be quickly cranked to reach the expected speed of the grinding wheel, which undoubtedly makes the operator's labor intensity high and prone to fatigue. Utility Model Content

[0003] In view of the above-mentioned deficiencies in the prior art, the utility model provides a hand-cranked grinding wheel device which can be adapted to grinding wheels of different sizes.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] A hand-cranked grinding wheel device is provided, which is characterized in that it includes a base, a mounting shell is provided on the base, a driving shaft and a driven shaft are provided in the mounting shell, the driving shaft and the driven shaft are connected through a gear transmission mechanism, a crank is provided at one end of the driving shaft, a grinding wheel is installed at one end of the driven shaft, and the crank and the grinding wheel are respectively located on both sides of the mounting shell, a mounting rod is provided on the mounting shell, and a position-adjustable retaining frame is provided on the mounting rod, and the retaining frame includes a U-shaped placing table that is clearance-matched with the outer edge of the grinding wheel and a V-shaped placing table that is clearance-matched with one side of the grinding wheel.

[0006] Furthermore, the gear transmission mechanism includes a driving gear arranged on the driving shaft and a driven gear arranged on the driven shaft. A transmission shaft is also arranged in the mounting housing, and a first transmission gear meshing with the driving gear and a second transmission gear meshing with the driven gear are arranged on the transmission shaft.

[0007] Furthermore, the driving gear, the driven gear, the first transmission gear and the second transmission gear are all helical gears of different sizes, the radial size of the driving gear is larger than the radial size of the first transmission gear, and the radial size of the second transmission gear is larger than the radial size of the driven gear.

[0008] Furthermore, a first strip hole and a second strip hole are provided in the extension direction of the mounting rod, and two threaded holes cooperating with the fixing bolts are provided in the gap on the mounting shell, and the two fixing bolts both pass through the first strip hole and fix the mounting rod on the mounting shell, and the retaining frame is fixed on the second strip hole by the cooperation and limitation of the adjusting bolt and the adjusting nut.

[0009] Furthermore, a sliding groove is provided on one side of the mounting rod in an extending direction, and a sliding block is provided on the retaining frame and is slidably engaged with the sliding groove.

[0010] Furthermore, the adjusting nut is in a disc shape, and a plurality of ratchet teeth are arranged on the peripheral wall of the adjusting nut.

[0011] Furthermore, the end of the driven shaft is provided with an external thread matching with the locking nut, a baffle is fixedly arranged on the driven shaft, a grinding wheel is sleeved on the driven shaft between the baffle and the locking nut, and a gasket is arranged between the locking nut and the grinding wheel.

[0012] The beneficial effects of the utility model are:

[0013] 1. The mounting rod and the retaining frame of this solution can be adjusted to the corresponding position according to the size of the grinding wheel, so that the retaining frame can adapt to grinding wheels of different sizes, and its practicality is strong; at the same time, the U-shaped placement table and the V-shaped placement table on the retaining frame can assist in limiting the workpiece and selectively contact and grind with the peripheral wall and side wall of the grinding wheel, thereby enhancing the stability of workpiece grinding.

[0014] 2. This solution uses the transmission coordination of the driving gear, the first transmission gear, the second transmission gear and the driven gear to enable the crank to provide driving force for the grinding wheel and achieve secondary acceleration of the grinding wheel, so that the operator can reach the expected rotation speed of the grinding wheel without quickly cranking the crank. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of a hand-cranked grinding wheel device.

[0016] Figure 2 This is a schematic diagram of the structure of a hand-cranked grinding wheel device when the grinding wheel is removed.

[0017] Figure 3 It is a top view of the hand-cranked grinding wheel device.

[0018] Among them, 1. base, 2. mounting shell, 3. driving shaft, 4. driven shaft, 5. crank handle, 6. grinding wheel, 7. mounting rod, 8. retaining frame, 9. U-shaped placement table, 10. V-shaped placement table, 11. driving gear, 12. driven gear, 13. transmission shaft, 14. first transmission gear, 15. second transmission gear, 16. first strip hole, 17. second strip hole, 18. fixing bolt, 19. adjusting bolt, 20. adjusting nut, 21. sliding groove, 22. sliding block, 23. ratchet, 24. locking nut, 25. baffle plate, 26. gasket. DETAILED DESCRIPTION

[0019] The specific implementation methods of the utility model are described below to facilitate technical personnel in this technical field to understand the utility model, but it should be clear that the utility model is not limited to the scope of the specific implementation methods. For ordinary technical personnel in this technical field, as long as various changes are within the spirit and scope of the utility model defined and determined by the attached claims, these changes are obvious, and all utility model creations using the concept of the utility model are protected.

[0020] like Figures 1 to 3 As shown, the hand-cranked grinding wheel 6 device of the present scheme comprises a base 1, a mounting shell 2 is arranged on the base 1, a driving shaft 3 and a driven shaft 4 are arranged in the mounting shell 2, the driving shaft 3 and the driven shaft 4 are connected through a gear transmission mechanism, a crank 5 is arranged at one end of the driving shaft 3, a grinding wheel 6 is installed at one end of the driven shaft 4, and the crank 5 and the grinding wheel 6 are respectively located on both sides of the mounting shell 2, a mounting rod 7 is arranged on the mounting shell 2, and a position-adjustable retaining frame 8 is arranged on the mounting rod 7, the retaining frame 8 comprises a U-shaped placing table 9 which is gap-matched with the outer edge of the grinding wheel 6 and a V-shaped placing table 10 which is gap-matched with one side of the grinding wheel 6, the U-shaped placing table 9 and the V-shaped placing table 10 can assist in limiting the workpiece and selectively contact and grind with the peripheral wall and side wall of the grinding wheel 6 to enhance the stability of workpiece grinding.

[0021] The gear transmission mechanism includes a driving gear 11 arranged on the driving shaft 3 and a driven gear 12 arranged on the driven shaft 4. A transmission shaft 13 is also arranged in the mounting housing 2. The transmission shaft 13 is provided with a first transmission gear 14 meshing with the driving gear 11 and a second transmission gear 15 meshing with the driven gear 12.

[0022] The driving gear 11, the driven gear 12, the first transmission gear 14 and the second transmission gear 15 are all helical gears of different sizes. Compared with spur gears, helical gears have the characteristics of smooth operation, low noise and stronger load-bearing capacity. The radial dimension of the driving gear 11 is larger than the radial dimension of the first transmission gear 14, and the radial dimension of the second transmission gear 15 is larger than the radial dimension of the driven gear 12. Such an arrangement enables the crank 5 to provide driving force for the grinding wheel 6. At the same time, the cooperation between the driving gear 11 and the first transmission gear 14 can achieve a primary increase in the rotation speed, and the first transmission gear 14 and the second transmission gear 15 are coaxially arranged and have the same angular velocity. Through the cooperation between the second transmission gear 15 and the driven gear 12, a secondary increase in the rotation speed can be achieved, thereby achieving a secondary acceleration of the grinding wheel 6, so that the operator can reach the expected rotation speed of the grinding wheel 6 without having to quickly crank the crank 5 by hand.

[0023] A first strip hole 16 and a second strip hole 17 are provided in the extending direction of the mounting rod 7, and two threaded holes cooperating with the fixing bolts 18 are provided in the gap on the mounting shell 2, and the two fixing bolts 18 both pass through the first strip hole 16 and fix the mounting rod 7 on the mounting shell 2, and the retaining frame 8 is fixed on the second strip hole 17 by the cooperation and limitation of the adjusting bolt 19 and the adjusting nut 20. The mounting rod 7 and the retaining frame 8 of this scheme can be adjusted to the corresponding position according to the size of the grinding wheel 6, so that the retaining frame 8 can adapt to grinding wheels 6 of different sizes, and its practicality is strong.

[0024] Preferably, a sliding groove 21 is provided in the extension direction of one side of the mounting rod 7, and a sliding block 22 is provided on the retaining frame 8 and is slidably engaged with the sliding groove 21 to prevent the retaining frame 8 from being offset; the adjusting nut 20 is disc-shaped, and a plurality of ratchet teeth 23 are provided on the peripheral wall of the adjusting nut 20 to facilitate the operator to tighten or loosen the adjusting nut 20.

[0025] The end of the driven shaft 4 is provided with an external thread that cooperates with the locking nut 24, and a baffle 25 is fixedly arranged on the driven shaft 4. The grinding wheel 6 is sleeved on the driven shaft 4 between the baffle 25 and the locking nut 24, and a gasket 26 is arranged between the locking nut 24 and the grinding wheel 6; the grinding wheel 6 can be fixed on the driven shaft 4 by tightening the locking nut 24, and the operation is convenient.

Claims

1. A hand-cranked grinding wheel device, characterized in that: It includes a base, a mounting shell is provided on the base, a driving shaft and a driven shaft are provided in the mounting shell, the driving shaft and the driven shaft are connected through a gear transmission mechanism, a crank is provided at one end of the driving shaft, a grinding wheel is installed at one end of the driven shaft, and the crank and the grinding wheel are respectively located on both sides of the mounting shell, a mounting rod is provided on the mounting shell, a retaining frame is movably provided on the mounting rod, and the retaining frame includes a U-shaped placing table which is clearance-matched with the outer edge of the grinding wheel and a V-shaped placing table which is clearance-matched with one side of the grinding wheel.

2. The hand-cranked grinding wheel device according to claim 1, characterized in that: The gear transmission mechanism includes a driving gear arranged on the driving shaft and a driven gear arranged on the driven shaft. A transmission shaft is also arranged in the mounting housing. The transmission shaft is provided with a first transmission gear meshing with the driving gear and a second transmission gear meshing with the driven gear.

3. The hand-cranked grinding wheel device according to claim 2, characterized in that: The driving gear, the driven gear, the first transmission gear and the second transmission gear are all helical gears of different sizes. The radial size of the driving gear is larger than that of the first transmission gear, and the radial size of the second transmission gear is larger than that of the driven gear.

4. The hand-cranked grinding wheel device according to claim 1, characterized in that: A first strip hole and a second strip hole are provided in the extension direction of the mounting rod, two threaded holes cooperating with fixing bolts are provided in the gap on the mounting shell, and both fixing bolts pass through the first strip hole and fix the mounting rod on the mounting shell, and the retaining frame is fixed on the second strip hole by the cooperation and limitation of the adjusting bolt and the adjusting nut.

5. The hand-cranked grinding wheel device according to claim 4, characterized in that: A sliding groove is arranged in the extending direction of one side of the mounting rod, and a sliding block which is slidably engaged with the sliding groove is arranged on the retaining frame.

6. The hand-cranked grinding wheel device according to claim 4, characterized in that: The adjusting nut is in the shape of a disc, and a plurality of ratchet teeth are arranged on the peripheral wall of the adjusting nut.

7. The hand-cranked grinding wheel device according to claim 1, characterized in that: The end of the driven shaft is provided with an external thread matched with a locking nut, a baffle is fixedly arranged on the driven shaft, the grinding wheel is sleeved on the driven shaft between the baffle and the locking nut, and a gasket is arranged between the locking nut and the grinding wheel.

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