Dustproof universal shaft

Abstract

The utility model discloses a dustproof cardan shaft which comprises a shaft head and a shaft tube, a first protective cover and a second protective cover are arranged outside the shaft tube, the first protective cover and the second protective cover are connected through an inserting mechanism, grooves are formed in the first protective cover and the second protective cover, and the first protective cover and the second protective cover are arranged in the grooves. And a contact plate is arranged in the groove through a buffer mechanism. The first protective cover and the second protective cover are arranged to form a complete protective cover, external substances such as dust, sandy soil and water are effectively prevented from entering the shaft tube, damage to the cardan shaft is reduced, the service life of the cardan shaft is prolonged, and the performance of the cardan shaft is improved. The first protection cover and the second protection cover are connected through the insertion mechanism, can be relatively easily arranged on the shaft tube in a sleeving mode and can be conveniently detached when maintenance or replacement is needed, the installation and maintenance process is simplified, and time and labor force are saved.

Description

Technical Field

[0001] The utility model relates to the technical field of universal shafts, in particular to a dustproof universal shaft. Background Art

[0002] Dust-proof universal joints are mainly used to connect two transmission shafts with different axes to achieve the transmission of torque and rotational motion, while preventing dust and other contaminants from entering the interior of the shaft and protecting the normal operation of the shaft. Universal joints usually consist of the following parts: shaft tube: the main component for transmitting torque and rotational motion; universal joint: connecting the shaft tubes and allowing them to rotate relative to each other at different angles; dust-proof protective cover: covering the outside of the shaft tube and universal joint to prevent dust, moisture, oil and other contaminants from entering the interior of the shaft; seals: used to enhance the sealing performance of the dust-proof protective cover and prevent contaminants from entering the interior of the shaft through the connection; bearings: supporting the rotation of the shaft tube and universal joint, and reducing friction and wear.

[0003] In the prior art, the protective cover of the dustproof universal joint shaft is usually fixed with screws, nuts or other fasteners, and the disassembly and assembly of the screws, nuts or other fasteners usually requires the use of corresponding tools, such as screwdrivers, wrenches, etc. This means that when performing disassembly and assembly operations, these specific tools must be available, otherwise the disassembly and assembly work cannot be completed, which increases the complexity of the operation and the dependence on tools. The use of fasteners such as screws and nuts for fixing usually requires disassembly and installation one by one, which will consume a lot of time. Especially when the protective cover needs to be frequently disassembled and assembled for maintenance or overhaul, this fixing method will significantly increase the operation time and workload. Therefore, in order to address the above problems, a dustproof universal joint shaft is proposed herein. Utility Model Content

[0004] The utility model aims to solve the shortcomings in the prior art and proposes a dustproof universal shaft.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A dustproof universal shaft comprises a shaft head and a shaft tube. A first protective cover and a second protective cover are arranged outside the shaft tube. The first protective cover and the second protective cover are connected by an insertion mechanism. A groove is arranged on the first protective cover and the second protective cover. A contact plate is arranged in the groove by a buffer mechanism.

[0007] Preferably, the plug-in mechanism includes an insertion block installed on the first protective cover, the second protective cover is provided with a slot corresponding to the insertion block, the insertion block is also provided with an extrusion groove, a positioning block is provided in the extrusion groove through the extrusion mechanism, and the second protective cover is provided with a positioning hole corresponding to the positioning block and connected to the slot.

[0008] Preferably, the extrusion mechanism comprises an extrusion spring arranged in the extrusion groove, and two ends of the extrusion spring are elastically connected to the outer wall of the positioning block and the inner wall of the extrusion groove respectively.

[0009] Preferably, the buffer mechanism comprises a buffer spring arranged in the groove, and two ends of the buffer spring are elastically connected to the inner wall of the groove and the outer wall of the contact plate respectively.

[0010] Preferably, a protective pad is provided on the surface of the contact plate that contacts the shaft tube, and anti-slip grooves are provided on the surface of the protective pad that contacts the shaft tube.

[0011] Preferably, the vertical cross-sectional views of the first protective cover and the second protective cover are both semicircular, and the first protective cover and the second protective cover are cylindrical as a whole.

[0012] Preferably, the number of contact plates in each groove is three, and each contact plate is arc-shaped.

[0013] Beneficial effects of the utility model:

[0014] 1. The first protective cover and the second protective cover form a complete protective cover, which effectively prevents foreign substances such as dust, sand, and moisture from entering the shaft tube, reduces damage to the universal shaft, and improves the service life and performance of the universal shaft.

[0015] 2. The first protective cover and the second protective cover are connected by a plug-in mechanism, and can be relatively easily put on the shaft tube, and can also be conveniently removed when maintenance or replacement is required, which simplifies the installation and maintenance process and saves time and labor. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic structural diagram of a dustproof universal joint shaft proposed by the utility model;

[0017] Figure 2 is a schematic diagram of the structure of the first protective cover and the second protective cover;

[0018] Figure 3 for Figure 2 A schematic diagram of the structure at A;

[0019] Figure 4 for Figure 2 Enlarged schematic diagram of the structure at B.

[0020] In the figure: 1 shaft head, 2 shaft tube, 3 first protective cover, 4 second protective cover, 5 groove, 6 plug block, 7 extrusion groove, 8 positioning block, 9 extrusion spring, 10 slot, 11 positioning hole, 12 contact plate, 13 buffer spring, 14 protection pad. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0022] Reference Figure 1-4 A dustproof universal shaft comprises a shaft head 1 and a shaft tube 2. A first protective cover 3 and a second protective cover 4 are arranged outside the shaft tube 2. The first protective cover 3 and the second protective cover 4, as well as the first protective cover 3, the second protective cover 4 and the shaft tube 2 are all sealed and connected, which can be achieved by means of sealing strips and sealing rings.

[0023] The first protective cover 3 and the second protective cover 4 are connected via an inserting mechanism. A groove 5 is provided on the first protective cover 3 and the second protective cover 4 . A contact plate 12 is provided in the groove 5 via a buffer mechanism.

[0024] The plug-in mechanism includes an insert block 6 installed on the first protective cover 3, a slot 10 corresponding to the insert block 6 is provided on the second protective cover 4, an extrusion groove 7 is also provided on the insert block 6, a positioning block 8 is provided in the extrusion groove 7 through an extrusion mechanism, and a positioning hole 11 corresponding to the positioning block 8 and connected to the slot 10 is provided on the second protective cover 4.

[0025] The extrusion mechanism includes an extrusion spring 9 arranged in the extrusion groove 7, and the two ends of the extrusion spring 9 are elastically connected to the outer wall of the positioning block 8 and the inner wall of the extrusion groove 7 respectively. The extrusion spring 9 realizes the extrusion of the positioning block 8 and can squeeze it into the positioning hole 11 to ensure the stability of the connection between the first protective cover 3 and the second protective cover 4.

[0026] The buffer mechanism includes a buffer spring 13 arranged in the groove 5, and the two ends of the buffer spring 13 are elastically connected to the inner wall of the groove 5 and the outer wall of the contact plate 12 respectively. The compression of the buffer spring 13 will trigger its recovery trend, which will cause the contact plate 12 to apply pressure to the shaft tube 2 to make it tightly combined.

[0027] A protective pad 14 is provided on the surface where the contact plate 12 contacts the shaft tube 2, and anti-slip grooves are provided on the surface where the protective pad 14 contacts the shaft tube 2. The anti-slip grooves can increase the friction between the protective pad 14 and the shaft tube 2 to prevent the shaft tube 2 from sliding or rotating during operation. At the same time, the protective pad 14 can also play a buffering and protective role to prevent the contact plate 12 from directly scratching or damaging the surface of the shaft tube 2, which is very important for maintaining the appearance and performance of the shaft tube 2.

[0028] The vertical cross-sections of the first protective cover 3 and the second protective cover 4 are both semicircular, and the first protective cover 3 and the second protective cover 4 are cylindrical as a whole. The cylindrical design matches the shape of the shaft tube 2, and can fit the shaft tube 2 tightly to provide comprehensive protection. At the same time, the first protective cover 3 and the second protective cover 4 can be relatively easily sleeved on the shaft tube 2, and can also be easily removed when maintenance or replacement is required. This design simplifies the installation and maintenance process, saving time and labor.

[0029] There are three contact plates 12 in each groove 5, and each contact plate 12 is arc-shaped. The arc-shaped contact plate 12 can better adapt to the shape of the cylindrical shaft tube 2 and fit more closely to the surface of the shaft tube 2, which can provide more stable support and fixation and reduce the shaking and vibration of the shaft tube 2 during operation.

[0030] When the utility model is used, the first protective cover 3 and the second protective cover 4 are connected together through the plug-in mechanism to form a complete protective cover. The plug block 6 is inserted into the slot 10, and the positioning block 8 enters the positioning hole 11 under the action of the extrusion spring 9 to ensure the stability of the protective cover connection. The protective cover and the shaft tube 2 are sealed by a sealing strip or a sealing ring to prevent dust, moisture or other impurities from entering.

[0031] The first protective cover 3 and the second protective cover 4 are cylindrical as a whole, matching the shape of the shaft tube 2, and can effectively prevent foreign matter such as dust, sand, and moisture from entering the interior of the shaft tube 2, reducing damage to the universal shaft. The protective pad 14 further prevents wear and scratches on the surface of the shaft tube 2. At the same time, the anti-slip pattern increases the friction with the shaft tube 2, preventing the shaft tube 2 from sliding or rotating during operation.

[0032] This design allows the first protective cover 3 and the second protective cover 4 to be relatively easily sleeved on the shaft tube 2, and can also be conveniently removed when maintenance or replacement is required, which simplifies the process of installation and maintenance, saving time and labor.

[0033] Through the above working principle, the dustproof universal shaft can provide comprehensive protection during the operation of the shaft tube 2, prevent dust from entering, reduce wear and vibration, and improve the service life and performance of the universal shaft. In general, the working principle of this dustproof universal shaft is to achieve effective protection and stable operation of the shaft tube 2 through the synergistic effect of multiple mechanisms such as sealing connection, buffering fit and dustproof protection.

[0034] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A dustproof universal shaft, characterized in that: The invention comprises a shaft head (1) and a shaft tube (2); a first protective cover (3) and a second protective cover (4) are provided outside the shaft tube (2); the first protective cover (3) and the second protective cover (4) are connected via an insertion mechanism; a groove (5) is provided on the first protective cover (3) and the second protective cover (4); a contact plate (12) is provided in the groove (5) via a buffer mechanism.

2. The dustproof universal shaft according to claim 1, characterized in that: The plug-in mechanism comprises an insert block (6) mounted on the first protective cover (3); the second protective cover (4) is provided with a slot (10) corresponding to the insert block (6); the insert block (6) is also provided with an extrusion groove (7); a positioning block (8) is provided in the extrusion groove (7) via an extrusion mechanism; and the second protective cover (4) is provided with a positioning hole (11) corresponding to the positioning block (8) and connected to the slot (10).

3. A dustproof universal shaft according to claim 2, characterized in that: The extrusion mechanism comprises an extrusion spring (9) arranged in the extrusion groove (7), and two ends of the extrusion spring (9) are elastically connected to the outer wall of the positioning block (8) and the inner wall of the extrusion groove (7) respectively.

4. The dustproof universal shaft according to claim 3, characterized in that: The buffer mechanism comprises a buffer spring (13) arranged in the groove (5), and two ends of the buffer spring (13) are elastically connected to the inner wall of the groove (5) and the outer wall of the contact plate (12) respectively.

5. The dustproof universal shaft according to claim 4, characterized in that: A protective pad (14) is provided on the surface of the contact plate (12) that contacts the shaft tube (2), and an anti-slip pattern is provided on the surface of the protective pad (14) that contacts the shaft tube (2).

6. The dustproof universal shaft according to claim 5, characterized in that: The vertical cross-sectional views of the first protective cover (3) and the second protective cover (4) are both semicircular, and the first protective cover (3) and the second protective cover (4) are cylindrical as a whole.

7. The dustproof universal shaft according to claim 6, characterized in that: The number of contact plates (12) in each groove (5) is three, and each contact plate (12) is designed to be arc-shaped.

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