A dental handpiece and dental drill cyclic pressure life testing device

Abstract

A dental handpiece and drill cyclic pressure life testing device includes a base plate, an adjustment seat mounted on one side of the base plate, a support column above the adjustment seat, a mounting block connected to the support column, a dental handpiece mounting seat connected above the mounting block, and a pressure testing bracket mounted on the other side of the base plate. A side mounting plate and a front mounting plate are connected to the pressure testing bracket. A motor and a rotating shaft are mounted on the side mounting plate, the motor driving the rotating shaft to rotate. An eccentric wheel is mounted on the rotating shaft, and a cam is fitted around the eccentric wheel. A push rod is mounted on the front mounting plate, and the cam is connected to the tail of the push rod via a pin. A sleeve is mounted at the front end of the push rod, and a pressure sensor is installed inside the sleeve. A pressure seat is mounted at the front end of the sleeve, and a spring is installed between the pressure seat and the pressure sensor. A pressure block is mounted on the surface of the pressure seat. This invention simulates the continuous working state of a dental drill to complete the life test of the micro-bearings inside the dental drill.

Description

Technical Field

[0001] This utility model relates to the field of bearing testing, specifically to a device for testing the cyclic pressure life of a dental handpiece or dental drill. Background Technology

[0002] A dental handpiece is a dental treatment instrument. The head of the handpiece is fitted with a drill, and inside the drill is a miniature bearing. During use, the drill head of the handpiece remains in contact with the teeth, and the miniature bearing inside the drill is subjected to pressure. Therefore, the miniature bearing needs to be tested to simulate the use of a dental handpiece before leaving the factory to determine its lifespan. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a dental handpiece and dental drill cyclic pressure life testing device to address the shortcomings of the prior art.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0005] A dental handpiece and drill cyclic pressure life testing device includes a base plate, an adjustment seat mounted on one side of the base plate, a support column above the adjustment seat, a mounting block connected to the support column, a dental handpiece mounting seat connected above the mounting block, a pressure testing bracket mounted on the other side of the base plate, a side mounting plate and a front mounting plate connected to the pressure testing bracket, a motor and a rotating shaft mounted on the side mounting plate, the motor driving the rotating shaft to rotate, an eccentric wheel mounted on the rotating shaft, a cam sleeved on the outer side of the eccentric wheel, a push rod mounted on the front mounting plate, the cam and the tail of the push rod connected by a pin, a sleeve mounted on the front end of the push rod, a pressure sensor installed inside the sleeve, a pressure seat mounted on the front end of the sleeve, a spring between the pressure seat and the pressure sensor, and a pressure block mounted on the surface of the pressure seat.

[0006] Furthermore, the adjustment seat includes an adjustment base and an adjustment slider. The adjustment base is mounted on the base plate, and the adjustment slider slides between the adjustment base and the adjustment base through a dovetail groove. The back and side of the adjustment base are provided with a support baffle and a side baffle. The support baffle is provided with a feed screw, and the side baffle is provided with a locking screw.

[0007] Furthermore, a support column connecting plate is connected to the bottom of the support column, the support column connecting plate is fixed on the adjusting slider, and a limit block is connected to the support column, the limit block being located below the mounting block.

[0008] Furthermore, the dental handpiece mounting base includes an "arch"-shaped bracket, with both ends of the "arch"-shaped bracket connected to the mounting block. A fixed clamping block is provided inside the "arch"-shaped bracket, and a movable clamping block is provided above the fixed clamping block. A clamping screw is connected above the "arch"-shaped bracket.

[0009] Furthermore, a synchronous pulley is installed at one end of the output shaft and drive shaft of the motor, and the synchronous pulleys are connected by a synchronous belt.

[0010] Furthermore, the cam is machined with a connecting hole, which is fitted onto the eccentric wheel. The eccentric wheel of the rotating shaft is machined with a cam baffle on its side, and a cam stop is fitted onto the rotating shaft. The cam stop is connected to the eccentric wheel, and the cam stop and cam baffle restrict the cam on the eccentric wheel.

[0011] Furthermore, a linear bearing is mounted on the front mounting plate, and the push rod is disposed inside the linear bearing.

[0012] Furthermore, the pressure seat includes a pressure stop block and a pressure connecting seat, which are connected to each other. The pressure stop block and the pressure connecting seat are disposed inside the sleeve. A spring is disposed between the pressure stop block and the pressure sensor. The pressure block is mounted on the pressure connecting seat. A flange is machined inside the sleeve to block the pressure stop block.

[0013] Furthermore, a bushing is provided between the pressure connection seat and the sleeve.

[0014] Furthermore, the pressure block is a ceramic block.

[0015] Compared with the prior art, the dental handpiece and dental drill cyclic pressure life testing device of this utility model uses a motor to drive the pressure block to reciprocate and apply pressure to the dental drill, simulating the scenario of continuous operation of the dental drill, and completing the life test of the micro bearing inside the dental drill. This testing device helps to improve the service life of the bearing. Attached Figure Description

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

[0017] Figure 2 This is a schematic diagram of the structure of the dental handpiece mounting base of this utility model;

[0018] Figure 3 This is a schematic diagram showing the state of the dental handpiece when it is in place:

[0019] Figure 4 This is a schematic diagram of the connection between the motor and the rotating shaft of this utility model;

[0020] Figure 5 This is a schematic diagram of the structure of the rotating shaft of this utility model;

[0021] Figure 6 This is a schematic diagram of the structure of the cam of this utility model;

[0022] Figure 7 This is a schematic diagram of the structure of the cam stop block of this utility model;

[0023] Figure 8 This is a schematic diagram of the connection between the cam stop and the rotating shaft of this utility model;

[0024] Figure 9 This is a schematic diagram of the installation structure of the pressure block of this utility model;

[0025] The components are as follows: 1. Base plate; 2. Adjustable seat; 3. Support column; 4. Limiting block; 5. Mounting block; 6. Dental handpiece mounting base; 7. Support column connecting plate; 8. Dental handpiece; 9. Pressure test bracket; 10. Side mounting plate one; 11. Side mounting plate two; 12. Front mounting plate; 13. Motor; 14. Rotating shaft; 15. Synchronous belt; 16. Eccentric wheel; 17. Cam; 18. Push rod; 19. Pin; 20. Connecting hole; 21. Cam stop. 22. Plate, cam stop, 23. linear bearing, 24. sleeve, 25. pressure sensor, 26. spring, 27. pressure block, 28. pressure stop, 29. pressure connecting seat, 30. flange, 31. bushing, 211. adjusting base, 212. adjusting slider, 213. feed screw, 214. locking screw, 611. "bow" shaped bracket, 612. fixed clamping block, 613. movable clamping block, 614. clamping screw. Detailed Implementation

[0026] The technical solutions in the embodiments of this utility model will be clearly and completely described below.

[0027] like Figures 1-9 As shown, a dental handpiece and dental drill cyclic pressure life testing device includes a base plate 1, an adjustment seat 2 installed on one side of the base plate 1, a support column 3 above the adjustment seat 2, a limit block 4 and a mounting block 5 connected to the support column 3, the limit block 4 being below the mounting block 5, and a dental handpiece mounting seat 6 connected above the mounting block 5. In this embodiment, the adjustment seat 2 is a MISUMI XSL60 X-axis manual slide. The adjustment seat 2 includes an adjustment base 211 and an adjustment slider 212. The adjustment base 211 is installed on the base plate 1, and the adjustment slider 212 slides with the adjustment base 211 through a dovetail groove. The back and side of the adjustment base 211 are provided with a support baffle and a side baffle. The support baffle is provided with a feed screw 213, which is used to control the front and rear position of the adjustment slider 212. The side baffle is provided with a locking screw 214, which is used to lock and fix the adjustment slider 212.

[0028] The bottom of the support column 3 is connected to a support column connecting plate 7, which is fixed on the adjusting slider 212. In this embodiment, the limiting block 4 adopts the SSCS20-12 open-type fixing ring from MISUMI. The limiting block 4 can move up and down on the support column 3 to adjust the lower limit of the mounting block 5. Then, the limiting block 4 is locked with screws. The mounting block 5 is fitted onto the support column 3, and screws are provided on both sides of the mounting block 5 for fastening. The dental handpiece mounting base 6 includes an "arch"-shaped bracket 611. The two ends of the "arch"-shaped bracket 611 are connected to the mounting block 5. A fixing clamping block 612 is provided inside the "arch"-shaped bracket 611. The two ends of the fixing clamping block 612 are fixed inside the "arch"-shaped bracket 611 with screws. A movable clamping block 613 is provided above the fixing clamping block 612. A clamping hole is machined between the movable clamping block 613 and the fixing clamping block 612. The clamping hole is used to install the dental handpiece.

[0029] A clamping screw 614 is connected above the "bow"-shaped bracket 611, and the clamping screw 614 contacts the clamping screw 614. Figure 3 As shown, after tightening the clamping screw 614, the movable clamping block 613 clamps the dental handpiece 8.

[0030] A pressure test bracket 9 is installed on the other side of the base plate 1. A side mounting plate 10, a second side mounting plate 11, and a front mounting plate 12 are connected to the pressure test bracket 9. A motor 13 is installed on the first side mounting plate 10. A rotating shaft 14 is arranged between the second side mounting plates 11. The two ends of the rotating shaft 14 are connected to the second side mounting plates 11 through bearings. A synchronous pulley is installed at one end of the output shaft and the drive shaft of the motor 13. The synchronous pulleys are connected to each other through a synchronous belt 15. The motor drives the rotating shaft 14 to rotate through the synchronous pulleys and the synchronous belt.

[0031] An eccentric wheel 16 is machined on the rotating shaft 14, and a cam 17 is sleeved on the outer side of the eccentric wheel 16. A push rod 18 is provided on the front mounting plate 12, and a bayonet is machined at the tail of the push rod 18. The cam 17 is located in the bayonet, and the cam 17 is connected to the tail of the push rod 18 by a pin 19. In this embodiment, a connecting hole 20 is machined on the cam 17, and the connecting hole 20 is sleeved on the eccentric wheel 16. A cam baffle 21 is machined on the side of the eccentric wheel 16 of the rotating shaft 14, and a cam stop 22 is sleeved on the rotating shaft 14. The cam stop 22 is connected to the eccentric wheel 16, and the cam stop 22 and the cam baffle 21 restrict the cam 17 on the eccentric wheel 16.

[0032] A linear bearing 23 is mounted on the front mounting plate 12. A push rod 18 is disposed inside the linear bearing 23. A sleeve 24 is mounted on the front end of the push rod 18. The side of the sleeve 24 is fixed to the push rod 18 by a set screw. A pressure sensor 25 is disposed inside the sleeve 24. A pressure seat is mounted on the front end of the sleeve 24. A spring 26 is disposed between the pressure seat and the pressure sensor 25. A pressure block 27 is mounted on the surface of the pressure seat.

[0033] In this embodiment, the pressure seat includes a pressure stop 28 and a pressure connecting seat 29, which are connected to each other by screws. The pressure stop 28 and the pressure connecting seat 29 are disposed inside the sleeve 24. A flange 30 is machined inside the sleeve 24 to block the pressure stop 28. The spring 26 is disposed between the pressure stop 28 and the pressure sensor 25. A bushing 31 is disposed between the pressure connecting seat 29 and the sleeve 24. The side of the bushing 31 is fixed by a set screw on the sleeve 24. The pressure connecting seat 29 moves within the bushing 31.

[0034] The pressure block 27 is mounted on the pressure connector 29, and the side of the pressure block 27 is locked by a set screw. In this embodiment, the pressure block 27 is a ceramic block, which has good wear resistance and avoids being worn down quickly by the dental drill.

[0035] During the internal bearing test of the dental drill, first fix the dental handpiece on the dental handpiece mounting base 6, align the dental drill with the pressure block 27, start the motor 13 and set the motor speed. The motor 13 drives the rotating shaft 14 through the synchronous pulley and synchronous belt. The eccentric wheel 16 on the rotating shaft 14 drives the cam 17 to move eccentrically. The cam 17 drives the push rod 18 to reciprocate. The pressure block 27 follows the push rod 18 to reciprocate. Then, adjust the front and back position of the dental handpiece through the adjusting seat 2 so that the dental drill gradually contacts the pressure block 27. At this time, the pressure sensor will transmit a signal through the data line, and the reading meter will display the pressure value. Once the test pressure value is reached, turn off the motor, tighten the locking screw 214, and start the motor 13 again to test the dental drill. After testing for a period of time, check whether the bearing is damaged. Then adjust the front and back position of the dental handpiece again, change to different pressure values, record the bearing service life, and improve the bearing according to the bearing damage and location.

[0036] This utility model is not limited to the embodiments described. Those skilled in the art can still make some modifications or changes without departing from the spirit and scope of this utility model. Therefore, the scope of protection of this utility model shall be determined by the scope defined in the claims.

Claims

1. A dental handpiece bur cycle pressurization life testing device, characterized by: The device includes a base plate, an adjustment seat mounted on one side of the base plate, a support column above the adjustment seat, a mounting block connected to the support column, and a dental handpiece mounting seat connected above the mounting block. A pressure testing bracket is mounted on the other side of the base plate, and a side mounting plate and a front mounting plate are connected to the pressure testing bracket. A motor and a rotating shaft are mounted on the side mounting plate, the motor driving the rotating shaft to rotate. An eccentric wheel is mounted on the rotating shaft, and a cam is fitted around the eccentric wheel. A push rod is mounted on the front mounting plate, and the cam is connected to the tail of the push rod via a pin. A sleeve is mounted at the front end of the push rod, and a pressure sensor is installed inside the sleeve. A pressure seat is mounted at the front end of the sleeve, and a spring is installed between the pressure seat and the pressure sensor. A pressure block is mounted on the surface of the pressure seat.

2. The device for testing the life of a dental handpiece dental drill circulating pressurization according to claim 1, characterized in that: The adjustment seat includes an adjustment base and an adjustment slider. The adjustment base is mounted on the base plate, and the adjustment slider slides between the adjustment base and the adjustment base through a dovetail groove. The back and side of the adjustment base are provided with a support baffle and a side baffle. The support baffle is provided with a feed screw, and the side baffle is provided with a locking screw.

3. A dental handpiece bur cycle pressurization life testing device according to claim 2, wherein: The bottom of the support column is connected to a support column connecting plate, which is fixed to the adjusting slider. A limit block is connected to the support column, and the limit block is located below the mounting block.

4. The device of claim 1, wherein: The dental handpiece mounting base includes an "arch"-shaped bracket, with both ends of the "arch"-shaped bracket connected to mounting blocks. A fixed clamping block is provided inside the "arch"-shaped bracket, and a movable clamping block is provided above the fixed clamping block. A clamping screw is connected to the top of the "arch"-shaped bracket.

5. The device of claim 1, wherein: The output shaft and drive shaft of the motor are equipped with synchronous pulleys at one end, and the synchronous pulleys are connected by a synchronous belt.

6. The device of claim 1, wherein: The cam has a connecting hole that fits onto the eccentric wheel. The eccentric wheel of the rotating shaft has a cam baffle on its side. A cam stop is fitted onto the rotating shaft. The cam stop is connected to the eccentric wheel. The cam stop and the cam baffle restrict the cam to the eccentric wheel.

7. The device of claim 1, wherein: A linear bearing is mounted on the front mounting plate, and the push rod is disposed inside the linear bearing.

8. The device of claim 1, wherein: The pressure seat includes a pressure stop block and a pressure connecting seat, which are connected to each other. The pressure stop block and the pressure connecting seat are disposed inside the sleeve. A spring is disposed between the pressure stop block and the pressure sensor. The pressure block is mounted on the pressure connecting seat. A flange is machined inside the sleeve to block the pressure stop block.

9. A dental handpiece bur cycle pressurization life testing device according to claim 8, wherein: A bushing is provided between the pressure connector and the sleeve.

10. A dental handpiece and dental drill cyclic pressure life testing device according to claim 8, characterized in that: The pressure block is a ceramic block.

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