A gear locking device based on gear transmission

Abstract

A kind of gear locking device based on gear drive, the device includes transmission shaft and the transmission gear equipped with at both ends thereof, transmission gear inside is supported axially by bearing seat with bearing, outside is equipped with expansion ring.One end of expansion ring is equipped with multiple broken slot and limiting slot, end of transmission shaft is fixed with the pressing washer with pressing block by bolt, pressing block is cooperated with limiting slot to provide axial thrust.Expansion ring outer periphery is equipped with expansion sleeve, and radial locking is realized by axial pre-tightening.The utility model adopts double locking mechanism, effectively ensures the concentricity of double gear drive, inhibits the axial displacement generated by helical gear, improves transmission stability, carrying capacity and structural reliability.

Description

Technical Field

[0001] This utility model relates to the field of transmission machinery technology, and in particular to a gear locking device based on gear transmission. Background Technology

[0002] In various mechanical transmission systems, rack and pinion transmission is a common way to convert rotary motion into linear motion. To improve transmission smoothness and load-bearing capacity, two transmission gears are usually placed at both ends of the transmission shaft to mesh with two parallel racks simultaneously, forming a "double gear drive" structure.

[0003] Existing locking devices mostly use simple locking nuts or flange connections. Due to machining and assembly errors, it is difficult to ensure that the rotation centers of the two gears are perfectly concentric, which will lead to uneven load distribution, with one gear overloaded and the other gear not properly engaged, generating vibration, noise, and accelerating gear wear. When using helical gears with better transmission smoothness, the gear meshing will generate significant axial force (lateral force), which will drive the drive shaft to move axially. Traditional locking nuts are prone to tensile fracture during long-term use.

[0004] Therefore, in view of the shortcomings of the existing technology, it is necessary to design a gear locking device based on gear transmission to solve the above problems.

[0005] It should be noted that the above introduction to the technical background is only for the purpose of providing a clear and complete explanation of the technical solution of this utility model and facilitating the understanding of those skilled in the art. It should not be assumed that the above content is known to those skilled in the art simply because it has been described in the background section of this utility model. Utility Model Content

[0006] To overcome the shortcomings of the prior art, the present invention aims to disclose a gear locking device based on gear transmission. This device can ensure the concentricity of the dual gear transmission, effectively suppress the axial force generated by the helical gear, and significantly improve the structural strength and stability of the transmission.

[0007] This utility model discloses a gear locking device based on gear transmission, comprising a drive shaft and drive gears mounted at both ends of the drive shaft and meshing with a rack. The inner side of the drive gears is axially supported by bearing seats with bearings; a tightening ring is fitted onto the drive shaft on the outer side of the drive gears; the end of the tightening ring away from the drive gears has multiple fracture grooves for radial deformation, and limit grooves are formed between the fracture grooves; pressure washers are bolted to both ends of the drive shaft, and pressure stops are formed on the pressure washers to cooperate with the limit grooves, providing axial thrust to the tightening rings; a tightening sleeve is fitted around the outer circumference of the tightening rings for radial locking. It should be noted that the tightening sleeve is a keyless mechanical component, and radial locking is achieved by adjusting the distance between the inner and outer rings axially.

[0008] A preferred technical solution: A lip seal is provided at the end of the bearing housing away from the transmission gear, and the lip seal is locked inside the bearing housing by a mounting plate. This structure effectively prevents external dust and impurities from entering the bearing, while also preventing internal grease leakage and extending the bearing's service life.

[0009] Preferred technical solution: The transmission gear is a helical gear. Helical gear transmission is smooth and has a large load-bearing capacity, but it will generate axial force. This locking device can effectively suppress the movement caused by this axial force.

[0010] A preferred technical solution: The outer periphery of the tightening ring has a conical surface structure with the larger end facing the pressure pad. This conical surface mates with the inner conical hole of the tightening sleeve, efficiently converting the axial thrust into a radial locking force.

[0011] Preferred technical solution: The drive shaft and the drive gear are connected by a flat key to achieve circumferential rotation limit and ensure torque transmission.

[0012] Preferred technical solution: The fracture grooves extend along the axial direction of the expansion ring, and there are no fewer than three of them, which are evenly distributed circumferentially to ensure that the expansion ring can undergo radial elastic deformation uniformly and stably.

[0013] Preferred technical solution: The expansion sleeve is a ZJ3 type expansion coupling sleeve, which is a standard part with good interchangeability and reliability.

[0014] Due to the application of the above technical solution, the beneficial effects of this utility model compared with the prior art are as follows:

[0015] This invention eliminates the need for threaded holes in the transmission gears. Instead, it uses pressure pads to axially push the expansion ring, locking the transmission gear onto a bearing housing with bearings. An expansion sleeve then radially locks the expansion ring to the transmission shaft, employing a double-locking and limiting method to ensure the reliability of the transmission gear locking connection. Furthermore, the elimination of flanges for transitions avoids the accumulation of installation and positioning errors in the transmission gears, resulting in better concentricity between the two gears and improved load balance. The double axial locking of the transmission gears also prevents axial movement when using helical gear transmissions. Attached Figure Description

[0016] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of a gear locking device based on gear transmission according to the present invention;

[0018] Figure 2 This is a schematic diagram of the shaft end structure of a gear locking device based on gear transmission according to the present invention;

[0019] Figure 3 This is an exploded view of the shaft end structure of a gear locking device based on gear transmission according to this utility model.

[0020] In the attached diagrams above, 100 is a rack, 1 is a drive shaft, 1a is a flat key, 2 is a drive gear, 3 is a bearing housing, 4 is a bearing, 5 is a shrinking ring, 51 is a fracture groove, 52 is a limiting groove, 6 is a pressure gasket, 61 is a pressure stop block, 7 is a shrinking sleeve, 8 is a lip seal, and 9 is a mounting plate. Detailed Implementation

[0021] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0022] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be used interchangeably where appropriate for the purposes of describing embodiments of this application herein. Furthermore, the terms "comprising" and "having," and their synonyms, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0023] In this application, the terms "upper," "lower," "left," "right," "front," "back," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this utility model and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0024] Furthermore, in addition to indicating direction or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this utility model according to the specific circumstances.

[0025] Furthermore, the terms "installation," "setting," "equipped with," "connection," "linking," "fitting," and "fitting" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, components, or parts. Similarly, "fitting" can mean completely or partially fitted. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0026] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0027] like Figure 1 , Figure 2 and Figure 3 As shown, this utility model discloses a gear locking device based on gear transmission, mainly including a transmission shaft 1, a transmission gear 2, a bearing seat 3, a bearing 4, a tightening ring 5, a pressure washer 6, and a tightening sleeve 7. The main components of this utility model will be described in detail below:

[0028] The drive shaft 1 is horizontally arranged, and its two ends are connected to two drive gears 2 via flat keys 1a for transmitting torque. The drive gears 2 are preferably helical gears that mesh with a rack 100. A bearing housing 3 is provided on the inner side (i.e., the opposite side) of each drive gear 2, and a bearing 4 is installed inside the bearing housing 3. The inner ring of the bearing 4 abuts against the drive gear 2 for axial positioning of the drive gear 2. It should be noted that the bearing housing 3 itself is fixedly connected to the drive shaft 1.

[0029] On the outside of each transmission gear 2, a tension ring 5 and a tension sleeve 7 are sequentially fitted onto the transmission shaft 1. The tension ring 5 is a sleeve-shaped part with four circumferentially evenly distributed fracture grooves 51 at its end near the pressure pad 6, giving this end the ability to undergo radial elastic deformation. An axial limiting groove 52 is also machined on the end face of the tension ring 5, located between adjacent fracture grooves 51. A threaded hole is machined at the end of the transmission shaft 1, and the pressure pad 6 is pressed onto the end face of the transmission shaft 1 by bolts. A pressure stop 61 is formed on the pressure pad 6, and the pressure stop 61 is used to cooperate with the limiting groove 52 to lock the tension ring 5 axially onto the bearing 4 of the bearing housing 3. It should be noted that the use of the pressure stop 61 in conjunction with the limiting groove 52 to push the tension ring 5 is to avoid interfering with the movement of the cylinder walls on both sides of the fracture groove 51, making it easier for it to undergo radial contraction. If the pressure pad 6 is used to directly cover and push the end of the expansion ring 5, the friction between the end of the expansion ring 5 and the pressure pad 6 needs to be overcome when the expansion ring 5 contracts radially. Therefore, a pressure stop 61 is required to cooperate with the limiting groove 52 for pushing and locking. The expansion sleeve 7 is a standard ZJ3 type expansion coupling sleeve, whose inner and outer rings are connected by multiple bolts evenly distributed around the circumference. When these bolts are tightened, the inner and outer rings move axially relative to each other, forcing the inner ring to contract radially, thereby pressing the expansion ring 5 onto the drive shaft 1, forming a double lock on the drive gear 2 with the pressure pad 6.

[0030] In some embodiments, such as Figure 1 , Figure 2 and Figure 3 As shown, a lip seal 8 is also provided at the outer end of the bearing housing 3. The lip seal 8 is pressed and fixed in the end cavity of the bearing housing 3 by a mounting plate 9, and is used to seal the bearing 4.

[0031] In some embodiments, such as Figure 1 , Figure 2 and Figure 3 As shown, the outer circumferential surface of the expansion ring 5 is machined into a conical surface, with the larger end facing the pressure pad 6. When the expansion sleeve 7 is locked, it will preferentially contact the end where the break groove 51 is located, thereby improving the locking strength.

[0032] like Figure 1 , Figure 2 and Figure 3 As shown, during installation, bearing 4 is installed inside bearing housing 3. A lip seal 8 and mounting plate 9 are installed on the other side of bearing housing 3. Drive shaft 1 passes through bearing housing 3, onto drive gear 2, and then through expansion ring 5. Pressure shim 6 is fastened, causing pressure stop 61 to insert into the limiting groove 52 of expansion ring 5. Bolts are screwed into the threaded holes at the end of drive shaft 1 and tightened. The bolts pull pressure shim 6, thus applying axial thrust to expansion ring 5. Expansion sleeve 7 is installed, and the bolts on expansion sleeve 7 are screwed in to cause radial contraction, thereby pressing the sidewalls of expansion ring 5 on both sides of the fracture groove 51 inward onto drive shaft 1. Finally, drive gear 2, expansion sleeve 7, expansion ring 5, and drive shaft 1 are tightly locked into a single unit, achieving backlash-free power transmission.

[0033] Finally, it should be noted that the above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A gear locking device based on gear transmission, comprising a transmission shaft (1) and transmission gears (2) mounted at both ends thereon and meshing with a rack, characterized in that: The inner side of the transmission gear (2) is axially supported by a bearing seat (3) with a bearing (4); a tension ring (5) is fitted on the transmission shaft (1) on the outer side of the transmission gear (2); a plurality of fracture grooves (51) are provided on the end of the tension ring (5) away from the transmission gear (2) for radial deformation, and a limit groove (52) is provided between the fracture grooves (51); pressure pads (6) are fixed at both ends of the transmission shaft (1) by bolts, and pressure blocks (61) that cooperate with the limit grooves (52) are formed on the pressure pads (6) to provide axial thrust for the tension ring (5); a tension sleeve (7) is fitted on the outer circumference of the tension ring (5) for radial locking.

2. The gear locking device based on gear transmission according to claim 1, characterized in that: The bearing housing (3) is provided with a lip seal (8) at one end away from the transmission gear (2), and the lip seal (8) is locked in the bearing housing (3) by the mounting plate (9).

3. The gear locking device based on gear transmission according to claim 1, characterized in that: The transmission gear (2) is a helical gear.

4. A gear locking device based on gear transmission according to claim 1, characterized in that: The outer periphery of the expansion ring (5) is a conical structure with the large end facing the pressure pad (6).

5. A gear locking device based on gear transmission according to claim 1, characterized in that: The drive shaft (1) and the drive gear (2) are connected by a flat key to achieve circumferential rotation limit.

6. A gear locking device based on gear transmission according to claim 1, characterized in that: The fracture groove (51) extends along the axial direction of the expansion ring (5), and there are no fewer than three of them, and they are evenly distributed circumferentially.

7. A gear locking device based on gear transmission according to claim 1, characterized in that: The expansion sleeve (7) is a ZJ3 type expansion coupling sleeve.

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