A worm gear adjusting device and a machine tool

Abstract

The utility model discloses a worm gear adjusting device and lathe belongs to lathe technical field, including the compression ring, locking nut and elastic piece of the sleeve of the shaft sleeve outside circumference is connected in proper order, worm gear mandrel is equipped with the first guide that is parallel to the worm gear axle, the second guide is equipped in the compression ring, and the axis of second guide and the axis of first guide are located in the same straight line, and there is a gap between first guide and second guide, and elastic piece is located on first guide and second guide, and one end of elastic piece is in contact with the sleeve, and the other end is in contact with the inner wall of compression ring, and locking nut is extruded compression ring when rotating and tightening outside circumference of the sleeve, and elastic piece generates compression, thereby adjusting the size of gap. The present application sets up elastic piece and ball in the inside of worm gear mandrel and compression ring, and the compression ring is extruded through the rotation and tightening of locking nut, and the compression of elastic piece is provided, thereby adjusting the gap between worm gear mandrel and compression ring, and the problem that the existing structure needs to be adjusted for many times and the reverse gap is not easy to solve is solved.

Description

Technical Field

[0001] This utility model relates to the field of machine tool technology, and in particular to a worm gear adjustment device and a machine tool. Background Technology

[0002] In CNC horizontal lathes, the tailstock primarily serves to clamp and support the workpiece. The tailstock's position adjusts to the length of the workpiece being machined, thus increasing its clamping capacity. Current technology employs a single pre-tightening of the worm gear using a long spacer and locking nut. This structure prevents adjustment of the backlash during reversal, causing creeping during movement and increasing the instability of the device. Furthermore, multiple pre-adjustments are time-consuming, labor-intensive, and costly. Summary of the Invention

[0003] In order to overcome the shortcomings of the prior art, the purpose of this utility model is to realize a worm gear adjustment device and machine tool that eliminates the reversing clearance of the device by adjusting the distance between the pressure ring and the worm gear spindle.

[0004] The objective of this utility model is achieved through the following technical solution: A worm gear adjustment device includes a worm gear shaft, a worm gear mandrel, and a bushing. The bushing is fitted around the outer circumference of the worm gear shaft, and the worm gear mandrel is fitted around the outer circumference of the bushing. The worm gear adjustment device further includes a pressure ring, a locking nut, and an elastic element. The pressure ring and the locking nut are sequentially fitted around the outer circumference of the bushing. The worm gear mandrel has a first guide parallel to the worm gear shaft, and the pressure ring has a second guide. The axis of the second guide is collinear with the axis of the first guide, and there is a gap between the first guide and the second guide. The elastic element is located on the first guide and the second guide, with one end abutting against the bushing and the other end abutting against the inner wall of the pressure ring. When the locking nut is rotated and tightened around the outer circumference of the bushing, it squeezes the pressure ring, causing the elastic element to compress, thereby adjusting the gap size.

[0005] Preferably, the bushing includes a continuous portion and an extension portion that are perpendicular to each other, the elastic element abuts against the extension portion, and the worm gear spindle, the pressure ring, and the locking nut are fitted to the outer periphery of the continuous portion.

[0006] Preferably, the worm gear adjusting device further includes a spacer sleeve, which is sleeved around the outer periphery of the through portion.

[0007] Preferably, the number of spacers is multiple.

[0008] Preferably, the first guide is a first channel, the second guide is a second channel, and the central axis of the second channel is on the same straight line as the central axis of the first channel.

[0009] Preferably, the worm gear adjusting device further includes a positioning member, which is located in the first channel and abuts against the extension. The elastic member is located in the first channel and extends into the second channel. One end of the elastic member abuts against the positioning member, and the other end abuts against the inner wall of the second channel.

[0010] Preferably, the positioning element is a sphere.

[0011] Preferably, the first guide is a first column, the second guide is a second column, and the elastic element is sleeved on the first column and extends to the outer periphery of the second column.

[0012] A machine tool includes the aforementioned worm gear adjusting device, and the machine tool further includes a worm gear transmission device, which is meshed with the worm gear adjusting device.

[0013] Preferably, the machine tool further includes a worm gear box, and the worm gear adjustment device is located inside the worm gear box.

[0014] Compared with existing technologies, the worm gear adjusting device and machine tool of this invention have the following advantages: This application's worm gear adjustment device incorporates an elastic element and a ball inside the worm gear spindle and pressure ring. When the locking nut is tightened by rotating the outer circumference of the bushing, it squeezes the pressure ring, causing the elastic element to compress and thus adjusting the gap between the worm gear spindle and the pressure ring. By reversing once, the device's reversing gap is eliminated. One forward and one reverse pre-adjustment ensures the worm gear assembly is perfectly aligned, solving the problem of existing structures requiring multiple adjustments and difficulty in reversing the gap. This reduces the difficulty of on-site assembly while improving work efficiency. By using the bearing outer ring as a spacer, sufficient rigidity of the worm gear and worm drive is ensured. The steel ball positioning element controls the positioning error to a very small range, guaranteeing precise worm gear transmission. Furthermore, the rolling connection method, compared to a sliding connection, effectively reduces frictional loss between components, extending the equipment's service life and reducing maintenance costs. Attached Figure Description

[0015] Figure 1 This is a structural cross-sectional view of the worm gear adjusting device of this application; Figure 2 For the reason Figure 1 A schematic diagram of the worm gear adjustment device and the worm gear transmission device of this application; Figure 3 This is a partial structural cross-sectional view of the machine tool in this application.

[0016] In the figure: 100, worm gear adjusting device; 101, worm gear shaft; 102, bushing; 1021, continuous part; 1022, extension part; 103, worm gear spindle; 1031, first guide; 104, pressure ring; 1041, second guide; 105, positioning part; 106, elastic part; 107, spacer; 108, locking nut; 200, worm gear transmission device; 300, worm gear box. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or it can be fixed through another intermediate component. When a component is said to be "connected to" another component, it can be directly connected to the other component or it may be fixed through another intermediate component. When a component is said to be "set on" another component, it can be set directly on the other component or it may be set through another intermediate component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0020] Figures 1-3 This utility model discloses a worm gear adjusting device 100 and a machine tool. The worm gear adjusting device 100 includes a worm gear shaft 101, a worm gear spindle 103, and a bushing 102. The bushing 102 is sleeved on the worm gear shaft 101 along its length, and the worm gear spindle 103 is sleeved on the outer circumference of the bushing 102. The worm gear adjusting device 100 also includes a pressure ring 104, a locking nut 108, and an elastic element 106. The pressure ring 104 and the locking nut 108 are sequentially sleeved on the outer circumference of the bushing 102.

[0021] The worm gear spindle 103 has a first guide 1031 parallel to the worm gear shaft 101 inside, and the pressure ring 104 has a second guide 1041 inside. There is a gap between the first guide 1031 and the second guide 1041. The elastic element 106 is located on the first guide 1031 and the second guide 1041. One end of the elastic element 106 abuts against the bushing 102, and the other end abuts against the inner wall of the pressure ring 104. When the locking nut 108 is rotated and tightened on the outer circumference of the bushing 102, it squeezes the pressure ring 104, causing the elastic element 106 to be compressed, thereby adjusting the gap size.

[0022] Specifically, the axis of the second guide 1041 is on the same straight line as the axis of the first guide 1031.

[0023] The bushing 102 includes a continuous portion 1021 and an extension portion 1022. The continuous portion 1021 is parallel to the worm gear shaft 101, and the extension portion 1022 is perpendicular to the axis of the worm gear shaft 101.

[0024] The elastic element 106 abuts against the extension 1022, and the worm gear spindle 103, pressure ring 104 and locking nut 108 are located on the outer periphery of the through part 1021.

[0025] In one embodiment of this application, the first guide 1031 is a first channel, the second guide 1041 is a second channel, and the central axis of the second channel is located on the same straight line as the central axis of the first channel.

[0026] In a preferred embodiment, the inner diameter of the second channel is equal to that of the first channel.

[0027] The worm gear adjustment device 100 also includes a positioning element 105. In a preferred embodiment of this application, the positioning element 105 is a sphere. The sphere is located in the first channel and abuts against the extension 1022. The elastic element 106 is located in the first channel and extends into the second channel. One end of the elastic element 106 abuts against the sphere, and the other end abuts against the inner wall of the second channel.

[0028] Specifically, the sphere is a steel sphere. On one hand, due to its spherical geometry, the steel sphere, upon contact with the elastic element 106, can quickly and accurately adapt to the predetermined spatial position based on the stable elastic force provided by the elastic element 106 in real time. Compared to other positioning elements 105 in this application, such as block-shaped or columnar positioning elements 105, the steel sphere can control the positioning error within a very small range, ensuring precise transmission of the worm gear. On the other hand, when an external driving force is applied to move the steel sphere, it can roll smoothly on the contact surface with minimal friction. This rolling connection method, compared to a sliding connection, effectively reduces frictional loss between components, which helps extend the service life of the equipment, reduce maintenance costs, and makes the entire mechanical movement process smoother and more efficient.

[0029] Specifically, the elastic element 106 is a spring. The inner diameter of the first channel is adapted to the lateral dimension of the spring.

[0030] In another embodiment of this application, the first guide 1031 is a first column, the second guide 1041 is a second column, and the elastic member 106 is sleeved on the first column and extends to the outer periphery of the second column.

[0031] Specifically, the lateral dimension of the elastic element 106 is larger than the dimensions of the first column and the second column, and the dimensions of the sphere are adapted to the lateral dimension of the elastic element 106, so that the first column and the second column are located inside the elastic element 106.

[0032] The worm gear adjusting device 100 also includes a spacer 107, which is sleeved on the outer periphery of the through portion 1021.

[0033] Specifically, there are multiple spacers 107. In this embodiment, the spacer 107 is the outer ring of the bearing, which greatly improves its own precision and rigidity.

[0034] Specifically, spacer 107 is located between worm gear spindle 103 and bushing 102, and spacer 107 is located between pressure ring 104 and locking nut 108.

[0035] The machine tool also includes a worm gear drive 200, which is meshed with the worm wheel adjustment device 100.

[0036] The machine tool also includes a worm gear box 300, within which the worm gear adjustment device 100 is located. The worm gear box 300 provides a relatively enclosed and stable operating environment for the worm gear adjustment device 100, isolating it from external dust, moisture, and debris. Simultaneously, the structure of the worm gear box 300 itself acts as a buffer and vibration absorber, ensuring the worm gear adjustment device 100 operates smoothly and guarantees the accuracy of each adjustment action.

[0037] When the worm gear adjustment device 100 of this application is in use, firstly, the locking nut 108 applies force to the elastic element 106 and ball inside the worm gear spindle 103 and the pressure ring 104 to adjust the distance between the worm gear spindle 103 and the pressure ring 104. Then, by reversing once, the reversing clearance during the movement of this device is eliminated. Next, the worm gear transmission device 200 and the worm gear spindle 103 mesh to transmit power to the worm gear shaft 101, which is then transmitted to the bed rack through the gear on the worm gear shaft. The meshing of the gear and rack drives the moving device to move. This application's worm gear adjustment device 100 and machine tool incorporate an elastic element 106 and a ball inside the worm gear spindle 103 and pressure ring 104. The clamping force of the elastic element 106 is adjusted by tightening the lock nut 108, thereby adjusting the distance between the worm gear spindle 103 and pressure ring 104. A single reverse rotation eliminates the device's reversing clearance. One forward and one reverse pre-adjustment ensures proper assembly of the worm gear device, solving the problem of existing structures requiring multiple adjustments and difficulty in reversing clearance. This reduces on-site assembly difficulty and improves work efficiency. Using the bearing outer ring as a spacer 107 ensures sufficient rigidity for the worm gear and worm drive. The steel ball positioning element 105 controls positioning errors to a minimal range, guaranteeing precise worm gear and worm transmission. Furthermore, the rolling connection method, compared to a sliding connection, effectively reduces frictional loss between components, extending equipment lifespan and reducing maintenance costs.

[0038] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the utility model patent. It should be noted that for those skilled in the art, several modifications and improvements can be made without departing from the concept of this utility model. These are all equivalent modifications and improvements made to the above embodiments based on the essential technology of this utility model, and all of these fall within the protection scope of this utility model.

Claims

1. A worm gear adjusting device, comprising a worm gear shaft, a worm gear spindle, and a bushing, wherein the bushing is sleeved around the outer periphery of the worm gear shaft, and the worm gear spindle is sleeved around the outer periphery of the bushing, characterized in that: The worm gear adjustment device further includes a pressure ring, a locking nut, and an elastic element. The pressure ring and the locking nut are sequentially sleeved on the outer circumference of the bushing. A first guide parallel to the worm gear shaft is provided inside the worm gear spindle, and a second guide is provided inside the pressure ring. The axis of the second guide is on the same straight line as the axis of the first guide, and there is a gap between the first guide and the second guide. The elastic element is located on the first guide and the second guide, with one end abutting against the bushing and the other end abutting against the inner wall of the pressure ring. When the locking nut is rotated and tightened on the outer circumference of the bushing, it squeezes the pressure ring, causing the elastic element to compress, thereby adjusting the size of the gap.

2. The worm gear adjusting device according to claim 1, characterized in that: The bushing includes a continuous portion and an extension portion that are perpendicular to each other. The elastic element abuts against the extension portion, and the worm gear spindle, the pressure ring, and the locking nut are fitted to the outer periphery of the continuous portion.

3. The worm gear adjusting device according to claim 2, characterized in that: The worm gear adjusting device also includes a spacer sleeve, which is sleeved on the outer periphery of the through section.

4. The worm gear adjusting device according to claim 3, characterized in that: The number of spacers is multiple.

5. The worm gear adjusting device according to claim 2, characterized in that: The first guide is a first channel, the second guide is a second channel, and the central axis of the second channel is on the same straight line as the central axis of the first channel.

6. The worm gear adjusting device according to claim 5, characterized in that: The worm gear adjustment device further includes a positioning element, which is located in the first channel and abuts against the extension. The elastic element is located in the first channel and extends into the second channel. One end of the elastic element abuts against the positioning element, and the other end abuts against the inner wall of the second channel.

7. The worm gear adjusting device according to claim 6, characterized in that: The positioning element is a sphere.

8. The worm gear adjusting device according to claim 1, characterized in that: The first guide is a first column, the second guide is a second column, and the elastic element is sleeved on the first column and extends to the outer periphery of the second column.

9. A machine tool, comprising the worm gear adjusting device as described in any one of claims 1 to 8, characterized in that: The machine tool also includes a worm gear transmission device, which is meshed with the worm wheel adjustment device.

10. The machine tool according to claim 9, characterized in that: The machine tool also includes a worm gear box, and the worm gear adjustment device is located inside the worm gear box.

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