Cross coupling

Abstract

The utility model discloses a cross coupling which comprises a pair of connecting shaft blocks and a cross block, the cross block comprises a base body, connecting shafts are arranged on the four faces of the base body respectively, connecting arms are arranged on the connecting shaft blocks, and the connecting shafts are matched with the connecting arms in a sliding mode. After assembly, a gap is reserved between the inner surface of the connecting arm and the base body of the cross block. Compared with the prior art, the connecting shaft has the advantages that the connecting shaft is simple and reasonable in structure, the connecting shaft comprises the pair of connecting shaft blocks and the cross-shaped block, a gap is reserved between the inner surface of the connecting arm and a base body of the cross-shaped block after the connecting shaft is assembled, so that the connecting shaft and the connecting arm can slide relatively, and a certain adjusting range can be achieved when the two shafts are connected through sliding fit; and the connecting shaft and the connecting arm are in translation sliding, so that the parallelism after installation can be ensured, and the transmission efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of coupling manufacturing, in particular to a cross coupling. Background Art

[0002] The cross coupling is used for connecting and transmitting between shafts. For example, in the patent application with application number CN202023000634.7 and the name “A Cross Universal Coupling”, a cross universal coupling is disclosed, which includes an active end fork, an active end intermediate section connected to the active end fork through a cross block, a passive end intermediate section connected to the active end intermediate section through a connecting rod, and a passive end fork connected to the passive end intermediate section through a cross block. The top surface of the cross block and the two opposite side surfaces perpendicular to the top surface are provided with mounting holes. The active end fork and the active end intermediate section are connected through the mounting holes on the cross block by a fastening device, and the passive end fork and the passive end intermediate section are connected through the mounting holes on the cross block by a fastening device. However, the inner surface of the cross block and the fork are in contact with each other, and the fork and the cross block are rotated together. Such a connection cannot ensure the parallelism between the two shafts, and will cause work loss and reduce efficiency during force transmission. Therefore, its structure needs to be further improved. Utility Model Content

[0003] The purpose of the utility model is to make up for the above-mentioned deficiencies and disclose to the public a cross coupling which has a simple and reasonable structure, is easy to assemble and can ensure the parallelism of two axes.

[0004] The technical solution of the utility model is achieved in this way:

[0005] A cross coupling comprises a pair of coupling blocks and a cross block, wherein the cross block comprises a base body, and connecting shafts are arranged on the four sides of the base body respectively; a connecting arm is arranged on the coupling block, and the connecting shaft and the connecting arm can be slidably matched; after assembly, a gap is left between the inner surface of the connecting arm and the base body of the cross block.

[0006] The measures to further optimize this technical solution are:

[0007] As an improvement, the connecting arm is provided with an assembly hole, and a shaft sleeve is provided between the assembly hole and the connecting shaft. The shaft sleeve can improve the wear resistance and sliding smoothness between the connecting arm and the assembly hole.

[0008] As an improvement, the connecting arm and the coupling block are detachably matched, the connecting arm is provided with a positioning pin, and the coupling block is provided with a corresponding positioning hole. The matching of the positioning pin and the positioning hole facilitates the assembly between the connecting arm and the coupling block.

[0009] As an improvement, the coupling block includes a coupling portion, and the coupling portion is provided with a deformation groove along the length direction. The provision of the deformation groove enables the coupling portion to better hold the shaft and improve the reliability of the connection.

[0010] As an improvement, the coupling portion is provided with a pair of fixing members screwed in opposite directions, so that the force can be more balanced.

[0011] As an improvement, the connecting arm is connected and fixed to the coupling block via a fixing piece.

[0012] As an improvement, the fixing members are all provided with stop washers.

[0013] As an improvement, the base is a frame-shaped structure, and the connecting shaft is arranged in the middle of the four sides of the base. The frame-shaped structure can reduce the weight of the coupling block, thereby reducing the overall weight of the coupling.

[0014] As an improvement, the cross block is an integral structure formed in one piece.

[0015] The advantages of the utility model compared with the prior art are:

[0016] The utility model discloses a cross coupling with a simple and reasonable structure. It comprises a pair of coupling blocks and a cross. After assembly, a gap is left between the inner surface of the connecting arm and the base of the cross block, so that the connecting shaft and the connecting arm can slide relatively. Through sliding fit, a certain adjustment range can be provided when the two shafts are connected. Moreover, the connecting shaft and the connecting arm can slide in translation, so that the parallelism after installation can be ensured, thereby improving the transmission efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional structural diagram of the utility model;

[0018] Figure 2 It is the front view of the utility model;

[0019] Figure 3 yes Figure 2 Sectional view of AA in the middle;

[0020] Figure 4 It is an exploded view of the utility model.

[0021] The names of the reference numerals in the accompanying drawings of the present utility model are:

[0022] The coupling block 1, the positioning hole 1a, the connecting arm 11, the assembly hole 11a, the coupling portion 12, the deformation groove 12a, the cross block 2, the gap 2a, the base 21, the connecting shaft 22, the shaft sleeve 3, the fixing part 4, and the back-stopping washer 41. DETAILED DESCRIPTION

[0023] The utility model is further described in detail below with reference to the accompanying drawings:

[0024] The following description is used to disclose the utility model so that those skilled in the art can implement the utility model. The preferred embodiments described below are only examples, and those skilled in the art can think of other obvious variations. The basic principles of the utility model defined in the following description can be used for other implementation schemes, variations, improvements, equivalent schemes, and other technical solutions that do not deviate from the spirit and scope of the utility model.

[0025] Those skilled in the art should understand that, in the disclosure of the present invention, the directions or positions indicated by the terms "longitudinal", "lateral", "up", "down", "left", "right", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. are based on the directions or positional relationships shown in the accompanying drawings, which are only simplified descriptions for the convenience of describing the present invention, and do not indicate or imply that the device or component referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the above terms should not be understood as limitations on the present invention.

[0026] It is to be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0027] like Figures 1 to 4 As shown, a cross coupling includes a pair of coupling blocks 1 and a cross block 2, wherein the cross block 2 includes a base 21, and connecting shafts 22 are respectively arranged on four sides of the base 21. A connecting arm 11 is arranged on the coupling block 1, and the connecting shaft 22 and the connecting arm 11 can be slidably matched; after assembly, a gap 2a is left between the inner surface of the connecting arm 11 and the base 21 of the cross block 2.

[0028] The connecting arm 11 is provided with an assembly hole 11a, and a shaft sleeve 3 is provided between the assembly hole 11a and the connecting shaft 22. The shaft sleeve 3 is made of brass material and has good wear resistance. The shaft sleeve 3 can not only improve the wear resistance, but also improve the smoothness of sliding between the connecting shaft 22 and the connecting arm 11.

[0029] The connecting arm 11 and the coupling block 1 are detachably matched, and the connecting arm 11 is provided with a positioning pin 11b, and the coupling block 1 is correspondingly provided with a positioning hole 1a. The connecting arm 11 and the coupling block 1 facilitate the assembly of the coupling.

[0030] When the connecting arm 11 is installed and fixed to the coupling block 1, it is first positioned by the cooperation of the positioning pin 11b and the positioning hole 1a, and then connected and fixed by the fixing member 4. The fixing member 4 is provided with a stop washer 41 to prevent it from loosening, thereby improving the reliability of the fixation.

[0031] The coupling block 1 comprises a coupling portion 12, and the coupling portion 12 is provided with a deformation groove 12a along the length direction.

[0032] A pair of fixing members 4 screwed in opposite directions are arranged on the coupling portion 12. The two fixing members 4 are screwed in opposite directions, so that the forces are balanced and the fixing is more reliable.

[0033] The fixing member 4 is preferably a bolt.

[0034] The base 21 is a frame-shaped structure, and the connecting shaft 22 is arranged in the middle of the four sides of the base 21 .

[0035] The cross block 2 is an integral structure formed in one piece.

[0036] The base 21 adopts a frame-shaped structure, which can reduce the weight of the cross block 2 and thus reduce the overall weight of the coupling.

[0037] Directions:

[0038] Insert one shaft into the through hole of the coupling part 12 of one coupling block 1 and fix it with bolts, and insert the other shaft into the through hole of the coupling part 12 of the other coupling block 1 and fix it with bolts. The installation is very convenient.

[0039] After the cross coupling of the utility model is assembled, a gap 2a is left between the inner surface of the connecting arm 11 and the base 21 of the cross block 2, that is, the relative position between the two coupling blocks 1 can be adjusted within a certain range, which makes the positions of the two shafts have a certain adjustment range, making the connection and assembly more convenient. Due to the existence of the gap 2a, the coupling block 1 and the cross block 2 can slide relative to each other, so that it has a certain degree of adjustability. However, the coupling block 1 and the cross block 2 slide in translation, which can ensure the parallelism between the two shafts, reduce the waste of work, and improve the transmission efficiency.

[0040] The above are only preferred embodiments of the present invention, and do not limit the implementation mode and protection scope of the present invention. Those skilled in the art should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A cross coupling, comprising a pair of coupling blocks (1) and a cross block (2), characterized in that: The cross block (2) comprises a base (21), and connecting shafts (22) are respectively arranged on four sides of the base (21). A connecting arm (11) is arranged on the coupling block (1), and the connecting shaft (22) and the connecting arm (11) can be slidably matched; after assembly, a gap (2a) is left between the inner surface of the connecting arm (11) and the base (21) of the cross block (2).

2. A cross coupling according to claim 1, characterized in that: The connecting arm (11) is provided with an assembly hole (11a), and a shaft sleeve (3) is provided between the assembly hole (11a) and the connecting shaft (22).

3. A cross coupling according to claim 2, characterized in that: The connecting arm (11) and the coupling block (1) are detachably matched, and a positioning pin (11b) is provided on the connecting arm (11), and a positioning hole (1a) is correspondingly provided on the coupling block (1).

4. A cross coupling according to claim 3, characterized in that: The coupling block (1) comprises a coupling portion (12), and the coupling portion (12) is provided with a deformation groove (12a) along the length direction.

5. A cross coupling according to claim 4, characterized in that: The shaft coupling portion (12) is provided with a pair of fixing members (4) which are screwed in opposite directions.

6. A cross coupling according to claim 5, characterized in that: The connecting arm (11) is connected and fixed to the coupling block (1) via a fixing member (4).

7. A cross coupling according to claim 6, characterized in that: The fixing members (4) are all provided with stop washers (41).

8. A cross coupling according to any one of claims 1 to 7, characterized in that: The base (21) is a frame-shaped structure, and the connecting shaft (22) is arranged in the middle of the four sides of the base (21).

9. A cross coupling according to claim 8, characterized in that: The cross block (2) is an integrally formed structure.

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