Universal joint cross shaft structure with automatic locking, automatic compensation and clearance elimination functions

Abstract

The utility model discloses a universal joint cross shaft structure capable of automatically locking, automatically compensating and eliminating a gap, which relates to the technical field of mechanical transmission and comprises a shaft body, four sides of the shaft body are respectively provided with a locking compensation mechanism used for automatically locking and eliminating the gap between a universal joint cross shaft and a bearing, the locking compensation mechanism comprises a shell assembly arranged on the four sides of the shaft body; the external expansion assembly is arranged in the shell assembly and comprises an external expansion block installed in the installation groove in a sliding mode, and limiting sliding blocks are fixedly installed at the top end and the bottom end of the external expansion block; the linkage assembly is arranged in the shell assembly; the kinetic energy assembly is arranged in the shell assembly, the external expansion assembly and the linkage assembly operate to drive the external expansion block to slide in the mounting groove and drive the shell to expand outwards, so that the connection of the bearing is locked when the bearing is mounted, and meanwhile, the external expansion distance of the external expansion block is adjustable; therefore, the clearance generated when the device is connected with the bearing is eliminated.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical transmission, in particular to a universal joint cross shaft structure capable of automatically locking, automatically compensating and eliminating gaps. Background Art

[0002] The universal joint cross shaft, also known as the cross universal shaft or universal joint, is an important mechanical component for achieving variable angle power transmission. Its main function is to keep the two ends of the shaft fixed and not hindered by each other during the transmission process, while being able to rotate and change direction.

[0003] According to the patent name: A universal joint cross-axis structure (patent publication number: CN218152061U, patent publication date: 2022-12-27), through the cooperation of the shaft body, the first connecting shaft, the second connecting shaft, the third connecting shaft and the fourth connecting shaft, it has the advantage of being able to reduce the inner cavity space of the bridge housing, so that the shaft body and the four connecting shafts can be in a concentric state, thereby greatly reducing the cross-axis's demand for the inner cavity space of the bridge housing, so that the weight of the bridge housing can be effectively reduced.

[0004] Based on the above-mentioned prior art, the currently existing universal joint cross-axis structure still has the following problems: during the transmission process, due to manufacturing and assembly errors, as well as long-term wear, a gap is generated between the universal joint cross-axis and the bearing, which not only affects the transmission accuracy, but also may cause mechanical vibration and noise. Therefore, the utility model provides a universal joint cross-axis structure with automatic locking and automatic compensation to eliminate the gap. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a universal joint cross-axis structure with automatic locking, automatic compensation and clearance elimination, which solves the following problems existing in the existing universal joint cross-axis structure: during the transmission process, the traditional universal joint cross-axis structure causes a gap between the universal joint cross-axis and the bearing due to manufacturing and assembly errors and long-term wear, which not only affects the transmission accuracy but also may cause mechanical vibration and noise.

[0006] To achieve the above purpose, the utility model is implemented by the following technical solutions: a universal joint cross shaft structure with automatic locking and automatic compensation to eliminate gaps, including a shaft body, and locking and compensation mechanisms are arranged on the four sides of the shaft body for automatic locking and eliminating gaps between the universal joint cross shaft and the bearing, and the locking and compensation mechanisms include:

[0007] The housing assembly is arranged on the four sides of the shaft body, and comprises a housing fixedly mounted on the four sides of the shaft body, six mounting grooves are opened on the outer side of the housing, and two limiting columns are fixedly mounted on the bottom of the inner cavity of the housing;

[0008] The external expansion assembly is arranged inside the housing assembly, and includes an external expansion block slidably mounted inside the mounting groove, the top and bottom ends of the external expansion block are fixedly mounted with limit sliders, the inner side of the external expansion block is fixedly mounted with a connecting block, and the interior of the connecting block is fixedly mounted with a sliding column;

[0009] The linkage assembly is arranged inside the housing assembly and is used to drive the external expansion assembly to move;

[0010] The kinetic energy component is arranged inside the shell component and is used to provide kinetic energy for the movement of the outward expansion component and the linkage component.

[0011] Preferably, the linkage assembly includes a threaded sleeve installed inside the shell, six linkage blocks are fixedly installed on the outer side of the threaded sleeve, a sliding groove is provided inside the linkage block, and two limiting holes are provided through the inside of the threaded sleeve.

[0012] Preferably, the kinetic energy assembly includes a top cover installed on the top of the shell by bolts, a slotted screw is installed through the middle of the top cover, a bottom shaft of the slotted screw is equipped with a locating bearing, and the locating bearing is fixedly installed at the bottom of the inner cavity of the shell.

[0013] Preferably, the limiting sliding blocks fixedly mounted at the top and bottom ends of the outer expansion block are adapted to slide inside the protruding grooves at the top and bottom ends of the installation groove.

[0014] Preferably, the sliding column is adapted to slide inside the sliding groove, and the specifications and dimensions of the sliding column are adapted to the sliding groove.

[0015] Preferably, the limiting column movably passes through the inside of the limiting hole, and the specifications and dimensions of the limiting column are adapted to those of the limiting hole.

[0016] Preferably, the threaded sleeve is threadably mounted on the surface of the slotted screw.

[0017] The utility model provides a universal joint cross shaft structure with automatic locking, automatic compensation and clearance elimination. Compared with the prior art, it has the following beneficial effects:

[0018] (1) The cross-axis structure of the universal joint with automatic locking and automatic compensation for eliminating clearance is provided with an expansion assembly. The operation of the linkage assembly drives the expansion block to slide inside the installation groove, and the shell expands outward, thereby locking the connection with the bearing when it is installed with the bearing. At the same time, the expansion distance of the expansion block is adjustable, thereby eliminating the clearance when the device is connected with the bearing.

[0019] (2) The cross-axis structure of the universal joint with automatic locking and automatic compensation for eliminating clearance is provided with a linkage assembly, six linkage blocks are fixedly installed on the outer side of the threaded sleeve, and the sliding column slides inside the sliding groove, so that the six outer expansion assemblies are driven to move synchronously when the threaded sleeve moves. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a right-side perspective structural diagram of the entire device of the utility model;

[0021] Figure 2 It is a right-side stereoscopic structural diagram of the housing assembly of the utility model;

[0022] Figure 3 This is a right-side stereoscopic structural diagram of the external expansion component of the utility model;

[0023] Figure 4 It is a right-side stereoscopic structural diagram of the linkage assembly of the utility model;

[0024] Figure 5 It is a right-side stereoscopic structural diagram of the kinetic energy component of the utility model.

[0025] In the figure: 1-shaft body, 2-locking compensation mechanism, 21-housing assembly, 211-housing, 212-mounting groove, 213-limiting column, 22-external expansion assembly, 221-external expansion block, 222-limiting slider, 223-connecting block, 224-sliding column, 23-linkage assembly, 231-threaded sleeve, 232-linkage block, 233-slide groove, 234-limiting hole, 24-kinetic energy assembly, 241-top cover, 242-slotted screw, 243-positioning bearing. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] See also Figure 1-5 , the utility model provides a technical solution:

[0028] A universal joint cross shaft structure with automatic locking, automatic compensation and clearance elimination includes a shaft body 1. The four sides of the shaft body 1 are provided with locking and compensation mechanisms 2 for automatic locking and clearance elimination between the universal joint cross shaft and the bearing. The locking and compensation mechanisms 2 include:

[0029] The housing assembly 21 is arranged on the four sides of the shaft body 1, and includes a housing 211 fixedly installed on the four sides of the shaft body 1, six mounting grooves 212 are opened on the outer side of the housing 211, and two limiting columns 213 are fixedly installed on the bottom of the inner cavity of the housing 211;

[0030] The outward expansion component 22 is arranged inside the housing component 21, and includes an outward expansion block 221 slidably installed inside the mounting groove 212. The top and bottom ends of the outward expansion block 221 are fixedly installed with a limit slider 222. A connecting block 223 is fixedly installed on the inner side of the outward expansion block 221. A sliding column 224 is fixedly installed inside the connecting block 223. The operation of the linkage component 23 drives the outward expansion block 221 to slide inside the mounting groove 212, and the housing 211 expands outward, thereby realizing locking the connection with the bearing when it is installed with the bearing. At the same time, the outward expansion distance of the outward expansion block 221 is adjustable, thereby realizing eliminating the gap when the device is connected with the bearing;

[0031] The linkage assembly 23 is disposed inside the housing assembly 21 and is used to drive the external expansion assembly 22 to move;

[0032] The kinetic energy component 24 is disposed inside the housing component 21 and is used to provide kinetic energy for the movement of the outward expansion component 22 and the linkage component 23 .

[0033] In this embodiment, the linkage assembly 23 includes a threaded sleeve 231 installed inside the shell 211, six linkage blocks 232 are fixedly installed on the outer side of the threaded sleeve 231, a slide groove 233 is provided inside the linkage block 232, two limiting holes 234 are provided through the inside of the threaded sleeve 231, six linkage blocks 232 are fixedly installed on the outer side of the threaded sleeve 231, and the sliding column 224 slides inside the slide groove 233, thereby realizing the synchronous movement of the six external expansion components 22 when the threaded sleeve 231 moves.

[0034] In this embodiment, the kinetic energy component 24 includes a top cover 241 installed on the top of the shell 211 by bolts, and a slotted screw 242 is installed through the middle of the top cover 241. The bottom shaft of the slotted screw 242 is equipped with a positioning bearing 243, and the positioning bearing 243 is fixedly installed at the bottom of the inner cavity of the shell 211. The user rotates the slotted screw 242 with a tool, and the rotation of the slotted screw 242 drives the threaded sleeve 231 to move up and down, thereby realizing the operation of the external expansion component 22, and the top cover 241 is bolted to the top of the shell 211, so that the top cover 241 is easy to disassemble and the internal maintenance of the shell 211 is convenient.

[0035] In this embodiment, the limiting sliders 222 fixedly installed at the top and bottom ends of the expansion block 221 are adapted to slide inside the protruding grooves at the top and bottom ends of the installation groove 212, thereby limiting the movement of the expansion block 221.

[0036] In this embodiment, the sliding column 224 is adapted to slide inside the sliding groove 233, and the sliding column 224 is adapted to the specifications and dimensions of the sliding groove 233. The sliding groove 233 is an oblique groove, so that when the sliding column 224 slides inside the sliding groove 233, it drives the external expansion block 221 to protrude from the inside of the installation groove 212 and retract into the inside of the installation groove 212.

[0037] In this embodiment, the limiting column 213 movably passes through the limiting hole 234 , and the size of the limiting column 213 matches that of the limiting hole 234 , thereby limiting the movement of the threaded sleeve 231 .

[0038] In this embodiment, the threaded sleeve 231 is threadably sleeved on the surface of the flat screw 242 , so that the threaded sleeve 231 can be moved up and down by rotating the flat screw 242 .

[0039] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0040] During operation, the bearing sleeve is first mounted on the outside of the housing 211, and then the operator rotates the slotted screw 242 with a tool. The rotation of the slotted screw 242 drives the threaded sleeve 231 to move up and down. When the threaded sleeve 231 moves up and down, the sliding column 224 slides inside the sliding groove 233, thereby driving the connecting block 223 to expand and retract through the linkage block 232, so that the expansion block 221 squeezes and locks the inner ring of the bearing and eliminates the gap.

[0041] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0042] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A universal joint cross-axis structure with automatic locking, automatic compensation and clearance elimination, comprising an axis body (1), characterized in that: The four sides of the shaft body (1) are all provided with locking compensation mechanisms (2) for automatically locking and eliminating the gap between the universal joint cross shaft and the bearing, and the locking compensation mechanism (2) comprises: The housing assembly (21) is arranged on four sides of the shaft body (1), and comprises a housing (211) fixedly mounted on the four sides of the shaft body (1), six mounting grooves (212) being provided on the outer side of the housing (211), and two limiting columns (213) being fixedly mounted on the bottom of the inner cavity of the housing (211); The external expansion assembly (22) is arranged inside the housing assembly (21), and comprises an external expansion block (221) slidably mounted inside the mounting groove (212), the top and bottom ends of the external expansion block (221) are fixedly mounted with a limit slider (222), the inner side of the external expansion block (221) is fixedly mounted with a connecting block (223), and the interior of the connecting block (223) is fixedly mounted with a sliding column (224); A linkage assembly (23) is disposed inside the housing assembly (21) and is used to drive the external expansion assembly (22) to move; The kinetic energy component (24) is arranged inside the housing component (21) and is used to provide kinetic energy for the movement of the outward expansion component (22) and the linkage component (23).

2. The cross-axis structure of a universal joint with automatic locking, automatic compensation and clearance elimination according to claim 1, characterized in that: The linkage assembly (23) comprises a threaded sleeve (231) installed inside the housing (211), six linkage blocks (232) are fixedly installed on the outside of the threaded sleeve (231), a sliding groove (233) is provided inside the linkage block (232), and two limiting holes (234) are provided through the inside of the threaded sleeve (231).

3. The cross-axis structure of a universal joint with automatic locking and automatic compensation for eliminating clearance according to claim 2, characterized in that: The kinetic energy assembly (24) comprises a top cover (241) mounted on the top of the housing (211) by means of bolts, a slotted screw (242) is movably installed in the middle of the top cover (241), a locating bearing (243) is installed on the bottom shaft of the slotted screw (242), and the locating bearing (243) is fixedly mounted on the bottom of the inner cavity of the housing (211).

4. The universal joint cross-axis structure with automatic locking, automatic compensation and clearance elimination according to claim 1, characterized in that: The limiting sliding blocks (222) fixedly mounted at the top and bottom ends of the external expansion block (221) are adapted to slide inside the protruding grooves at the top and bottom ends of the installation groove (212).

5. The universal joint cross-axis structure with automatic locking, automatic compensation and clearance elimination according to claim 2, characterized in that: The sliding column (224) is adapted to slide inside the sliding groove (233), and the specifications and dimensions of the sliding column (224) and the sliding groove (233) are adapted.

6. The universal joint cross-axis structure with automatic locking, automatic compensation and clearance elimination according to claim 2, characterized in that: The limiting column (213) movably passes through the inside of the limiting hole (234), and the specifications and dimensions of the limiting column (213) and the limiting hole (234) are compatible.

7. The universal joint cross-axis structure with automatic locking, automatic compensation and clearance elimination according to claim 3, characterized in that: The threaded sleeve (231) is threadably sleeved on the surface of the slotted screw (242).

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