Coupling block, cross coupling and gear motor

Abstract

The embodiment of the utility model provides a coupling block, a cross coupling and a speed reducing motor, the coupling block is used for being inserted into one side of a middle disc of the cross coupling, a mounting groove is formed in the side wall of the coupling block, and the mounting groove is used for being in interference insertion connection with a rotating part. The mounting grooves have at least two groove widths, and the groove widths of the mounting grooves are gradually reduced in the direction close to the middle disc. According to the coupling block provided by the embodiment of the invention, the coupling block can adapt to rotating pieces of various sizes, multiple times of mold opening are not needed, and the manufacturing cost is saved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mechanical transmission, in particular to a shaft coupling block, a cross shaft coupling and a speed reduction motor. BACKGROUND

[0002] At present, the cross shaft coupling is widely used in the mechanical industry, which has the advantages of compact structure, large carrying capacity, high transmission efficiency, low noise and long service life. The cross shaft coupling usually comprises a middle disc and shaft coupling blocks inserted on both sides of the middle disc, and the shaft coupling blocks on both sides are respectively fixedly connected with corresponding rotating members, so as to realize the transmission between the two rotating members.

[0003] However, the existing cross shaft coupling block can only be fixedly connected with a rotating member of a single preset size, and the scope of application is small. When a rotating member of a size different from the preset size is encountered, a new mold needs to be opened, which increases the manufacturing cost. SUMMARY

[0004] In view of the above, the first aspect of the embodiments of the present application provides a shaft coupling block for a cross shaft coupling, which aims to solve the problem that the existing cross shaft coupling can only be fixedly connected with a rotating member of a single size. The shaft coupling block is used to be inserted on one side of a middle disc of the cross shaft coupling. A side wall of the shaft coupling block is provided with a mounting groove, and the mounting groove is used to be inserted with a rotating member in interference. The mounting groove has at least two groove widths, and the groove width of the mounting groove gradually decreases from the direction close to the middle disc.

[0005] Preferably, the mounting groove is a through groove axially penetrating the shaft coupling block.

[0006] Preferably, the mounting groove has three groove widths.

[0007] Preferably, the shaft coupling block is provided with a first limiting hole, and the first limiting hole is used to be inserted with a first protrusion corresponding to the middle disc. Alternatively, a second protrusion is arranged on the side of the shaft coupling block facing the middle disc, and the second protrusion is used to be inserted with a second limiting hole corresponding to the middle disc.

[0008] Preferably, the shaft coupling block is provided with two first limiting holes, and the two first limiting holes are arranged on both sides of the mounting groove and are symmetrical about the axial center line.

[0009] The second aspect of the embodiments of the present application provides a cross shaft coupling, which comprises a middle disc and two shaft coupling blocks according to any one of the above-mentioned embodiments. The two shaft coupling blocks are inserted on both sides of the middle disc, and the mounting grooves of the two shaft coupling blocks are respectively inserted with corresponding rotating members located on both sides of the middle disc.

[0010] Preferably, both side walls of the middle disc are provided with insertion grooves, and the two insertion grooves are respectively inserted with the two shaft coupling blocks one by one.

[0011] Preferably, the bottom wall of the slot is provided with two first protrusions, the two first protrusions are symmetrical about the axial center line, the coupling block is provided with two first limiting holes, and the two first protrusions are inserted into the two first limiting holes one by one when the coupling block is inserted into the slot.

[0012] The third aspect of the embodiment of the application provides a speed reduction motor, the speed reduction motor comprising a speed reducer, a motor body and the cross shaft coupling described in any of the above embodiments, the mounting slots of the two coupling blocks are respectively inserted into the output shaft of the speed reducer and the rotating shaft of the motor body.

[0013] According to the coupling block, the cross shaft coupling and the speed reduction motor provided in the above embodiment, the stepped slot structure is arranged on the coupling block, so that the coupling block can be fixedly connected with rotating members of various sizes, and multiple mold opening is not required, thereby saving manufacturing cost. BRIEF DESCRIPTION OF DRAWINGS

[0014] Fig. 1 A combined state structure schematic diagram of a cross shaft coupling provided by the embodiment of the application is shown in the figure;

[0015] Fig. 2 An exploded state structure schematic diagram of a cross shaft coupling provided by the embodiment of the application is shown in the figure;

[0016] Fig. 3 A combined state structure schematic diagram of a speed reduction motor provided by the embodiment of the application is shown in the figure.

[0017] BRIEF DESCRIPTION OF DRAWINGS

[0018] 2-cross shaft coupling, 3-speed reducer, 4-motor body, 20-coupling block, 21-intermediate disc, 200-mounting slot, 201-first limiting hole, 210-slot, 211-first protrusion, 30-output shaft, 40-rotating shaft. DETAILED DESCRIPTION

[0019] The application will be described in further detail below with specific embodiments and with reference to the drawings. Similar elements in different embodiments are denoted by similar reference numerals. In the following embodiments, many details are described in order to make the application better understood. However, a person skilled in the art can easily recognize that some features can be omitted in different cases, or can be replaced by other elements, materials or methods. In some cases, some operations related to the application are not shown or described in the specification, in order to avoid the core part of the application being overwhelmed by too much description, and it is not necessary to describe these related operations in detail for a person skilled in the art according to the description in the specification and general technical knowledge in the art.

[0020] In addition, features described in the specification, operations or characteristics can be combined in any appropriate manner to form various embodiments. Meanwhile, the steps or actions in the method description can also be sequentially exchanged or adjusted in a manner that is apparent to those skilled in the art. Therefore, the various sequences in the specification and the drawings are only for the purpose of clearly describing a certain embodiment, and do not mean that the sequence is necessary, unless otherwise stated that a certain sequence must be followed.

[0021] The serial numbers of the components in the specification, such as "first", "second", etc., are only used to distinguish the described objects, and do not have any sequence or technical meaning. The "connection" and "coupling" in the present application include direct and indirect connection (coupling) unless otherwise specified.

[0022] Please refer to Figs. 1 to 3 The first aspect of the present application provides a coupling block 20 for a cross coupling 2, the coupling block 20 is used for inserting one side of the intermediate disc 21 of the cross coupling 2, the side wall of the coupling block 20 is provided with a mounting groove 200, the mounting groove 200 is used for interference fit with the rotating member, wherein the mounting groove 200 has at least two groove widths and the groove width of the mounting groove 200 gradually decreases from the direction close to the intermediate disc.

[0023] It can be understood that the groove width, that is, the width of the groove. The interference fit means that the size of the rotating member is larger than the groove width of the mounting groove 200 in the natural state, so that the two can be inserted and fixed. Specifically, the interference fit can be achieved by heating the coupling block 20 to expand and increase the mounting groove 200, and then inserting the rotating member and finally cooling and shrinking to clamp the rotating member. In addition, the above-mentioned stepped groove is arranged to gradually decrease in groove width from the direction close to the intermediate disc, so as to ensure that the rotating member with large size can enter the mounting groove and be connected with interference.

[0024] According to the coupling block 20 provided by the embodiment of the present application, by arranging the above-mentioned stepped groove structure, it can be adapted to fixedly connect with rotating members of various sizes, without the need for multiple mold opening and without the need for other installation tools for installation, thereby saving the manufacturing cost.

[0025] As one of the examples, the mounting groove 200 is arranged as a through groove axially penetrating the coupling block 20. By arranging the mounting groove as a through groove, it can be more easily expanded by heating during interference fit processing, further simplifying the installation process.

[0026] Specifically, the mounting groove 200 can be provided with three groove widths, thereby adapting to the insertion of rotating members of three sizes.

[0027] As one of the examples, the shaft coupling block 20 is provided with a first limiting hole 201 for inserting the first protrusion 211 corresponding to the intermediate disc 21, or the shaft coupling block 20 is provided with a second protrusion (not shown in the figure) on the side facing the intermediate disc 21, and the second protrusion is used for inserting the second limiting hole (not shown in the figure) corresponding to the intermediate disc 21. In other words, the shaft coupling block 20 can be provided with limiting holes or protrusions matched with the limiting holes. By setting the limiting holes and the protrusions to be inserted and matched, the connection stability between the shaft coupling block and the intermediate disc is further improved.

[0028] Specifically, the shaft coupling block 20 can be provided with two first limiting holes 201, and the two first limiting holes 201 are arranged on both sides of the mounting groove 200 and are symmetrical about the axial center line, so as to further improve the connection stability between the shaft coupling block and the intermediate disc. It can be understood that the axial direction is the length direction of the rotating member (for example, the rotating shaft of the motor).

[0029] Referring to Fig. 1 and Fig. 3 , the second aspect of the embodiment of the present application further provides a cross shaft coupling 2, which comprises an intermediate disc 21 and two shaft coupling blocks 20 of any of the above embodiments, and the two shaft coupling blocks 20 are respectively inserted on both sides of the intermediate disc 21, and the mounting grooves 200 of the two shaft coupling blocks 20 are respectively inserted with the rotating members corresponding to both sides of the intermediate disc 21.

[0030] As one of the examples, both sides of the intermediate disc 21 are provided with an insertion slot 210, and the two insertion slots 210 are respectively inserted with the two shaft coupling blocks 20. Based on this structure, the cross shaft coupling block can be further miniaturized.

[0031] Specifically, the bottom wall of the insertion slot 210 can be provided with two first protrusions 211, and the two first protrusions 211 are symmetrical about the axial center line, and the shaft coupling block 20 is provided with two first limiting holes 201, and the two first protrusions 211 are respectively inserted with the two first limiting holes 201 when the shaft coupling block 20 is inserted in the insertion slot 210. By setting the limiting holes and the protrusions to be inserted and matched, the connection stability between the shaft coupling block and the intermediate disc is further improved.

[0032] Referring to 3, the third aspect of the embodiment of the present application further provides a speed reduction motor, which comprises a speed reducer 3, a motor body 4 and a cross shaft coupling 2 as described in any of the above embodiments, and the mounting grooves 200 of the two shaft coupling blocks 20 are respectively inserted with the output shaft 30 of the speed reducer 3 and the rotating shaft 40 of the motor body 4. The shafts of the motor body 4 and the speed reducer 3 are connected through the cross shaft coupling, so as to improve the transmission efficiency between the motor body 4 and the speed reducer 3.

[0033] It should be understood that the above description is only used to help understand the present application and is not used to limit the present application. Those skilled in the art can make several simple deductions, modifications or replacements according to the idea of the present application.

Claims

1. A coupling block for a cross coupling, characterized in that The coupling block is used for being inserted into one side of the intermediate disc of the cross coupling, a side wall of the coupling block is provided with a mounting groove, the mounting groove is used for being inserted into the rotating member in interference fit, wherein the mounting groove has at least two groove widths, and the groove width of the mounting groove gradually decreases from the direction close to the intermediate disc.

2. The coupling block of claim 1, wherein, The mounting groove is a through groove axially penetrating the coupling block.

3. The coupling block of claim 1, wherein, The mounting groove has three groove widths.

4. A coupling block according to any one of claims 1 to 3, wherein The coupling block is provided with a first limiting hole used for being inserted into a corresponding first protrusion of the intermediate disc, or a second protrusion is arranged on the side of the coupling block facing the intermediate disc, and the second protrusion is used for being inserted into a corresponding second limiting hole of the intermediate disc.

5. The coupling block of claim 4, wherein, The coupling block is provided with two first limiting holes, and the two first limiting holes are arranged on both sides of the mounting groove and are symmetric about the axial center line.

6. A cross coupling, characterized by The cross coupling comprises an intermediate disc and two coupling blocks as claimed in any one of claims 1-5, the two coupling blocks are respectively inserted into both sides of the intermediate disc, and the mounting grooves of the two coupling blocks are respectively inserted into corresponding rotating members located on both sides of the intermediate disc.

7. The cross coupling of claim 6 wherein, Both side walls of the intermediate disc are provided with insertion grooves, and the two insertion grooves are respectively inserted into the two coupling blocks in one-to-one correspondence.

8. The cross coupling of claim 7 wherein, A bottom wall of the insertion groove is provided with two first protrusions symmetric about the axial center line, the coupling block is provided with two first limiting holes, and the two first protrusions are respectively inserted into the two first limiting holes when the coupling block is inserted into the insertion groove.

9. A reduction motor characterized by, The speed reduction motor comprises a speed reducer, a motor body and a cross coupling as claimed in any one of claims 6-8, and the mounting grooves of the two coupling blocks are respectively inserted into an output shaft of the speed reducer and a rotating shaft of the motor body.

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