KR200429421Y1 - Vacancy prevention equipment of the screw spindle which ascends and descends - Google Patents

Abstract

The present invention forms a screw jack with no gap between noise and thread during operation, and makes it possible to compensate for the precision, and is firmly supported by the improvement of wear resistance and the impact of heavy weight. An object of the present invention is to provide a clearance preventing device of a lifting type screw jack. In the present invention, the main shaft can be driven up and down by transmitting the rotational force generated from the worm gear to the main shaft by a screw thread formed evenly inside the main shaft and the worm gear. In addition, it is possible to maximize the precision of the spindle and worm gear wheels by transmitting a certain pressure device (disc spring) and this pressure to the spindle to compensate for noise and thread gap and precision during operation. The feature is that one pressure wheel is applied.

 screw jack, Non backrush screw jack, dual structure worm gear wheel

Description

Vacancy prevention equipment of the screw spindle which ascends and descends}

1 is a perspective view of the screw jack of the present invention.

Figure 2 is a schematic exploded perspective view of the major components stacked on each other sequentially to implement the inventive screw jack.

Figure 3 (a) (b) is a partially enlarged view showing in detail that the clearance between the thread can be removed by the interaction of the disk spring and the worm wheel which is the main part of the present invention.

Figure 4 is a longitudinal cross-sectional view of the screw jack constructed in accordance with a preferred embodiment of the present invention.

Figure 5 (a) (b) is another embodiment showing an example that the connection portion of the present invention can be configured in various forms.

6 is a schematic half sectional and plan view of a conventional screw jack operated only by one worm gear wheel.

Figure 7 (a) (b) is a schematic diagram showing the configuration differences between the screw jack of the present invention and the conventional screw jack.

* Description of the symbols for the main parts of the drawings *

1. HOUSING 2. WORM GEAR WHEEL

3. PRESS WHEEL 4. SCREW SPINDLE

5. DISK SPRING 6. Worm

7. HOUSING COVER 8. TAPER ROLL BEARING

9. BALL BEARING 10. BALL BEARING

11.KEY 12.BALL BEARING

13. BALL BEARING 14. DUST RUBBER COVER

15.SEAL 16.STOPPER

17. KEY HOME 18. Connection

The present invention relates to a screw spindle elevating screw jack that induces a heavier object to be elevated evenly without deviation using the spiral principle, and more specifically, the interaction between the worm and the worm gear wheel. In order to enable the up and down movement of the main shaft, a screw thread is formed on the outer side of the main shaft, and several disk springs and one pressurizing wheel are positioned inside the screw jack to remove noise, as well as to remove the play between the threads, to maximize the contact surface. In addition, the present invention relates to a play prevention device for the main shaft lifting screw jack, which enables safer and more accurate control by preventing a backlash that may occur during vertical movement of the main shaft.

In general, screw jacks are a useful tool for easily moving up and down relatively heavy objects with mechanical force, so that they can perform their intended work properly. These jack jacks are widely used in various fields. In addition, it is also used as a tool suitable for lifting the vehicle lower body as needed for tire puncture or snow chain installation, basic maintenance, etc. of the vehicle, as well as widely used in industrial plant and machinery fields.

In particular, the screw jack is also used as a component of a device that is essential for the nonwoven fabric manufacturing process.At least 9 sets and at least 20 sets of at least one device are attached to such a device, so that the device is absolutely It has become an important component. However, the equipment required for manufacturing the nonwoven fabric described above is vibrating in nature, and the screw jack is held upside down to carry out work while the load is held down, such as noise, vibration, and abrasion reduction due to thread play. The problem is more serious, and this has led to a defect directly related to the defective product of the device.

Despite these persistent problems, screw jacks, which have been used for the past 20 years, have been designed and manufactured without any intention of development, so that customers who purchase the device prefer to use quiet devices, long-life devices, and high quality products. It became. Although there are still companies that manufacture screw jacks professionally, it is difficult to expect the effect to actively solve the above problems.

As such, in the present invention, a screw jack is applied to various devices so that the object can be evenly raised and lowered. In this design, various problems arising from the vertical movement of the screw, namely, wear of the thread due to continuous work and Such as the impact of vertical operation with a relatively heavy object supported, the inaccuracy caused by the play of the screw and the noise caused by machine operation, and the bounce or backlash that may be caused by continuous lifting. It is intended to provide a superior and differentiated main shaft lifting screw jack by reconfiguring to complement the problem.

The present invention is devised to solve the above problems, it is formed in the structure without the gap between the noise and the thread during operation, it is possible to compensate for the impact relaxation and precision to be firmly supported by the improvement of wear resistance and heavy weight impact It is an object of the present invention to provide a play prevention device for a main shaft lifting screw jack that can be moved uniformly without any deviation in driving. In addition, another object of the present invention is to prevent the backlash (backlash) that may occur during the vertical movement of the screw jack in order to implement a screw jack capable of more safe and accurate control.

In order to achieve the above object, in the present invention, the main shaft may be driven up and down by transmitting the rotational force generated from the wheel gear to the main shaft by a screw thread formed evenly in the main shaft and the worm gear wheel. Another disc that maximizes the precision of the spindle and worm gear wheels by transmitting several disc springs and the pressure provided by the disc springs to the spindle to compensate for noise and thread clearance, impact relief and accuracy during operation. Its feature is that the pressure wheel is applied.

Hereinafter, the play prevention device of the main shaft lifting screw jack according to the present invention will be described in detail with reference to the accompanying drawings.

Figure 1 is a perspective view of the screw jack of the present invention, Figure 2 is a schematic exploded perspective view of the main components are sequentially stacked to implement the screw jack of the present invention, Figure 3 (a) (b) is the main part of the present invention Partial enlarged view showing in detail that the clearance between the thread can be removed by the interaction of the in-disk spring and the pressure wheel, Figure 4 is a longitudinal cross-sectional view of the screw jack constructed in accordance with a preferred embodiment of the present invention, Figure 5 (a (b) is another exemplary embodiment showing that the connection portion of the present invention can be configured in various forms, Figure 6 is a schematic half-sectional view and plan view of a conventional screw jack that is operated only by one worm gear wheel Figure 7 (a) (b) shows a schematic diagram showing the difference in configuration of the screw jack of the present invention and the conventional screw jack.

The present invention relates to a lifting screw jack configured to enable vertical movement of the main shaft (4) associated with the connecting portion (18) by the interaction of the worm and the worm gear wheel, which was operated only with one main shaft and one worm gear wheel. Unlike conventional screw jacks, several disk springs 5 and one pressure wheel 3 are provided inside the main body 1 so as to remove the noise generated during vertical movement of the main shaft 4 and the clearance between the threads. It is further provided to improve the wear resistance, and to complement the impact mitigation and precision is characterized by the implementation of a screw jack that can be elevated evenly without heavier weight objects.

As shown in FIGS. 2 to 4, the screw jack of the present invention has a structure similar to that of the conventional one implemented by the engagement driving method of the conventional worm 6 and the worm gear wheel 2, and their driving force is consequently the main shaft. By rotating (4), vertical reciprocating motion is possible.

On the other hand, Figure 6 and Figure 7 (a) shows a conventional screw jack, it can be seen that it is composed of only one worm gear wheel (2) which is driven in engagement with the worm (6) inside the main body (1). . This is a system in which the conventional screw jack is operated with only one worm gear wheel 2, whereas the present invention further attaches one worm gear wheel 2 and another pressurizing wheel 3 to their organic action. It is characterized by being a screw jack for precision lifting.

The present invention provides a plurality of bearings (8, 9, 10, 12, 13), worm and worm gear wheels (6, 2), pressure wheel (3), spindle (4), connecting portion (18) and disk spring (disk spring, The combination of 5) enables a series of organic driving, which is shown in detail in FIG. 2.

Figure 2 shows a schematic exploded perspective view of the main components constituting the screw jack main body 1 of the present invention, as well as to establish the position so that the worm gear wheel 2 is meshed with the worm 6, The tapered roller bearing 8, the worm gear wheel 2, the ball bearing 9, the pressure wheel 3, the disk spring 5, the dust cover 14, and the cover 7 are sequentially accommodated. For reference, the inner surface of the worm gear wheel 2 to form a predetermined thread so that the main shaft (4) can be fitted.

The main shaft (4) is formed into the worm gear wheel (2) while being screwed to form a screw thread (screw) on the outer surface so as to be able to engage, as well as coupled to the predetermined connection portion 18 in the upper end of the main shaft and raised and Will implement the descent movement.

The pressure wheel 3 is positioned between the ball bearing 9 and the ball bearing 10 positioned above the worm gear wheel 2 so as to maintain a constant space with the worm gear wheel 2 and the pressure wheel 3 at the same time. An annular engaging piece 16 is formed in the center portion, and provides a predetermined space until the main shaft 4 is guided into the worm gear wheel 2. In addition, the worm gear wheel 2 is a rotational movement, in this case, the key groove 17 is formed in common at one end portion adjacent to each other so that the movement of the pressure wheel 3 and the worm gear wheel 2 can be integrated. Then, predetermined keys 11 are inserted to fix them.

On the other hand, the pressing wheel (3) is located on the upper side of the worm gear wheel (2), it is assembled while maintaining a 2-3mm interval with the worm gear (2) wheel. This is to allow the pressure wheel 3 to naturally flow under pressure by several disc springs 5 formed on the upper end of the screw jack body 1, thereby raising and lowering the main shaft 4 It is possible to completely eliminate fine thread tolerances.

The pressure wheel (3) is supported by the ball bearings (9, 10), the disc spring (5) by pressing the outer diameter of the ball bearing (10) fine sliding friction force between the outer diameter of the ball bearing and the screw jack body inner diameter As the pressure wheel 3 is configured to have the same direction of rotation in connection with the worm gear wheel 2 and the key 11, the key groove 17 in which the key 11 is accommodated is the pressure wheel 3. In order to provide a clearance for the vertical movement), it is preferable that the space is configured with a somewhat more space than the key (11).

Hereinafter, referring to (a) and (b) of FIG. 3, the functions and interactions of the disc spring 5 and the pressure wheel 3, which are main parts of the present invention, will be described.

The present invention utilizes the elastic force of the disk spring by applying the disk spring (5) and the pressure wheel (3) to the screw jack main body (1) to eliminate the absence of the buffer against the wear and vertical impact of the conventional screw jack Of course, the present invention relates to an improved screw jack configured to prevent noise, vibration, and the like caused by thread play, and to actively reduce the elasticity caused by the rise of the spindle.

As shown in (a) and (b) of FIG. 3, the screw jack of the present invention is first engaged with the worm gear wheel inner thread while the worm gear wheel 2 is rotated by driving the worm and the worm gear wheels 6 and 2. As the main shaft 4 naturally rotates in one direction, the main shaft is raised or lowered to achieve the desired purpose. Figure 3 (b) shows the thread (a) of the worm gear wheel and the screw thread (A) of the main shaft is not affected by the disk spring (5), the main part of the present invention, Figure 3 (a) is The disk spring 5 located above the pressing wheel 3 shows the pressing wheel thread C and the spindle screw A in a situation in which the pressing wheel 3 presses the pressing wheel 3 downward.

Here, referring to the main shaft (4), due to the rotational force of the worm gear wheel, the screw thread (a) of the worm gear wheel is pressed against the screw thread (A) of the main shaft engaged with the worm gear wheel thread (a), the main shaft is gradually vertically upward movement Will be This is shown in detail by partially expanding through (b) of FIG.

In the conventional screw jack, which is dependent on the method as shown in FIG. 3 (b), a space spaced on a corresponding friction surface of the thread is generated due to the above-described action performed continuously and repeatedly, causing noise and vibration. In the present invention, as shown in FIG. 3 (a), the disk spring 5 is further provided on the upper side of the pressure wheel 3, so that the pressure pressurized by the rise of the main shaft 4 is engaged. By pressing only in one direction to maximize the adhesion of these threads to solve the problem that the contact surface of the other side of the thread is spaced apart. That is, in the case where the screw thread C of the pressure wheel is pushed up in a state in close contact with the spindle thread A for the upward movement of the spindle 4, the pressure wheel screw C and the same shape as in FIG. The lower ends of the spindle threads A are in close contact with each other. At this time, the disc spring 5 positioned at the upper end of the main body 1 has a relatively retracting force, and the pressure wheel (3) is caused by the repulsive force of the disc spring not to contract. The downward pressure is applied to the thread (C) of the pressing wheel to press the downward direction (in this case, the pressing wheel will move up and down due to the spaced space with the worm gear). Thereby, the pressure supplied in a certain direction is canceled out so that the adhesion of these threads in contact can be maintained, as shown in FIG.

However, (a) (b) of FIG. 3 illustrates a phenomenon of relatively offsetting the pressure limited to only one surface as the thread C of the pressure wheel is pressed downward by the disc spring 5. The spacing grooves between the threads shown in the drawings are only intentionally shown to help understanding of the present invention, and it will be apparent that such spacing grooves are not substantially generated.

Hereinafter, a brief description of the operation and effects of the present invention screw jack.

A predetermined worm 6 fitted to and supported by the conventional ball bearings 23 and 13 may be engaged with the worm gear wheel 2, and the worm gear wheel 2 provided inside the main body may perform a shaft function. It is formed to extend in the longitudinal direction, the inner thread is provided with a screw thread to be coupled to the main shaft (4), the worm gear wheel (2) is in the organic drive together with the worm (6) in the worm gear wheel The main shaft (4) fitted to the side is vertical vertical movement.

In the vertical axis of the main shaft 4, a tapered roller bearing 8 is formed on the main body 1 so that a worm gear wheel can be supported and rotated therebetween, and a space between the ball bearings 9 and 10 ball bearings is predetermined. The pressure wheel 3 is provided to provide pressure until the main shaft is guided to the worm gear wheel 2, and the inner surface of the pressure wheel 3 also forms a thread. Subsequently, the disk spring 5 is positioned at the upper end of the main body, and then a separate cover 7 is provided to completely accommodate the above-mentioned components inside the main body, thereby being firmly fixed with screws or the like.

The cover 7 preferably forms a 2 to 3 mm spaced space from the main body in the state where the disc spring 5 is accommodated, and then is firmly fastened with a bolt or the like. Therefore, a constant pressure is always applied to the inside of the main body. You lose.

The disk spring (5) is provided in an even number so that the lowermost spring is in contact with the outer circumference of the ball bearing 10, the uppermost spring is the outer circumference of the pressure on the outer circumference of the cover body Place it in the applied state and assemble it with bolts.

On the other hand, reference numeral 14 denotes a dust cover, 15 is a part for preventing dust mixing in order to ensure precision as a seal, the connection portion 18 of the present invention is shown in (a) (b) of FIG. It will be obvious that it can be configured in various shapes as described.

Embodiments described above are configured to help the understanding of the present invention, it is only one embodiment that can be applied to the present invention, and the scope of the present invention is not limited to the above-described embodiment.

According to the screw jack of the present invention implemented in the above configuration, there is an effect that can also function as a shock absorber to ensure the wear resistance to the impact and to prepare for the vertical impact, especially the noise between the thread and the thread during operation of the device This eliminates the need for more precise screw jacks without deviation.

Claims (2)

The main shaft is driven up and down by being coupled to the connecting portion in the main body, and the main shaft forms a screw thread so as to be combined with the worm gear wheel. In the screw jack which can be configured to be capable of vertical movement of the main shaft, The bearing and the pressure wheel is installed on the upper side of the worm gear wheel, the pressure preventing device of the spindle jack lifting screw jack, characterized in that the pressure wheel is configured to apply a constant pressure to the main shaft in the direction of the worm gear wheel by a disk spring as a pressure device. The method of claim 1, As the repulsive force of the disc spring presses the pressure wheel in the direction of the worm gear wheel, the pressure wheel flows as much as the spaced space between the worm gear wheel and the main shaft, so that the play of the thread is applied to the thread surfaces in mutual friction with one direction. A play preventing device of a spindle lift screw jack characterized by being constructed so that it does not occur.

Images