Speed reducer

Abstract

The utility model relates to the technical field of power transmission equipment, and provides a speed reducer which comprises a first shell, a second shell, an inner gear ring, a gear set, a first coupler, a first bearing, a second coupler and a second bearing. The first shell, the inner gear ring and the second shell are connected in sequence; the gear set is mounted in the inner gear ring; the first coupler is installed in the first bearing, the first bearing is installed in the first shell, one end of the first coupler is used for being matched with the fixed end of a lead screw, and the other end of the first coupler is matched with the gear set; the second coupler is installed in the second bearing, the second bearing is installed in the second shell, one end of the second coupler is used for being matched with the output end of a motor, and the other end of the second coupler is matched with the gear set. On the basis, the length of the transmission structure can be reduced, and meanwhile the assembling time and the production cost are reduced.

Description

Technical Field

[0001] This invention relates to the field of power transmission equipment technology, and specifically to a speed reducer. Background Technology

[0002] Speed ​​reducers are used in mechanical equipment to increase the output torque of motors. Planetary gear reducers are widely used in small equipment or space-constrained scenarios due to their simple structure and small size. However, traditional planetary gear reducers require a coupling to transmit the output rotational motion to a lead screw, and the lead screw requires additional fixed and support seats. This results in a large installation space requirement and long length for the transmission system, increasing the number of installation structures and the precision requirements for fit, thereby extending assembly time and production costs.

[0003] Therefore, this application studies a speed reducer that eliminates the need for an external coupling and lead screw fixed end, simplifying the transmission mechanism, reducing installation space requirements, and lowering the transmission structure length. It is particularly suitable for small equipment and space-constrained transmission needs, while also reducing assembly time and production costs. Utility Model Content

[0004] In order to reduce the length of the transmission structure and at the same time reduce assembly time and production costs, this application provides a speed reducer.

[0005] The speed reducer provided in this application adopts the following technical solution:

[0006] A speed reducer includes a first housing, a second housing, an internal gear ring, a gear set, a first coupling, a first bearing, a second coupling, and a second bearing; the first housing, the internal gear ring, and the second housing are connected in sequence.

[0007] The gear set is installed in the internal gear ring; the first coupling is installed in the first bearing, the first bearing is installed in the first housing, one end of the first coupling is used to cooperate with the fixed end of the lead screw, and the other end is used to cooperate with the gear set;

[0008] The second coupling is installed inside the second bearing, which is installed inside the second housing. One end of the second coupling is used to engage with the output end of the motor, and the other end is used to engage with the gear set.

[0009] By adopting the above technical solution, the first coupling and the second coupling are integrated into the first housing and the second housing respectively, and directly cooperate with the gear set, eliminating the need for additional coupling installation space in traditional reducers. The direct cooperation between the first coupling and the fixed end of the lead screw, and the direct cooperation between the second coupling and the output end of the motor, further reduce the overall length of the transmission structure and the installation space requirements, making it particularly suitable for small equipment and space-constrained scenarios. At the same time, during installation, it is only necessary to install the lead screw and the output end of the motor into the first coupling and the second coupling respectively, thus reducing assembly time and production costs.

[0010] Optionally, the first coupling includes a first mounting part, which has an opening and closing groove. The two sides of the opening and closing groove have interconnected connecting holes. A mounting bolt passes through one of the connecting holes and is screwed into the other connecting hole. The first housing has a through hole corresponding to the connecting hole. During installation, the fixed end of the lead screw is inserted into the first mounting part, and the first mounting part is locked and the lead screw is fixed by the mounting bolt.

[0011] By adopting the above technical solution, it is only necessary to insert the fixed end of the lead screw into the first mounting part, and then tighten the screw through the through hole so that the first mounting part clamps the lead screw, thereby fixing the lead screw and facilitating the installation of the lead screw.

[0012] Optionally, the second coupling includes a second mounting part, which has an opening and closing groove. The two sides of the opening and closing groove have interconnected connecting holes. A mounting bolt passes through one of the connecting holes and is screwed into the other connecting hole. The second housing has a through hole corresponding to the connecting hole. During installation, the output end of the motor is inserted into the second mounting part, and the motor output end is fixed by locking the second mounting part with the mounting bolt.

[0013] Optionally, a dust cover may also be included, which covers the through hole.

[0014] Optionally, the gear set includes a central gear, a plurality of meshing planetary gears, a mounting shaft, a third bearing, and a mounting bracket. One end of the central gear is mounted in the second coupling, and the other end meshes with the planetary gears. The planetary gears mesh with the internal gear ring. The mounting shaft is mounted in the third bearing, and the third bearing is mounted in the planetary gears. Both the mounting shaft and the first coupling are mounted on the mounting bracket.

[0015] Optionally, the mounting bracket has a first mounting hole at its center and second mounting holes distributed around the circumference of the first mounting hole; the first coupling includes a first connecting part, which passes through the first bearing and is installed in the first mounting hole, and the mounting shafts are installed in the second mounting holes one by one.

[0016] Optionally, both the first housing and the second housing have through holes, and the internal toothed ring has threaded holes. Fixing bolts are inserted through the through holes of the first housing and the second housing respectively and then screwed into the threaded holes.

[0017] Optionally, a spacer is also included, which is installed between the second housing and the gear set.

[0018] By adopting the above technical solution, the partition can prevent friction between the gear set and the second housing when the gear set rotates.

[0019] Optionally, a fourth bearing is also included, which is installed inside the first housing. During installation, the fixed end of the lead screw is connected to the second coupling via the fourth bearing.

[0020] In summary, this application includes the following beneficial technical effects:

[0021] 1. By integrating the first coupling and the second coupling into the first housing and the second housing respectively, and directly engaging with the gear set, the additional coupling installation space in traditional reducers is eliminated. The direct engagement of the first coupling with the fixed end of the lead screw and the direct engagement of the second coupling with the motor output end further reduces the overall length of the transmission structure and the installation space requirements, making it particularly suitable for small equipment and space-constrained scenarios. At the same time, during installation, it is only necessary to install the lead screw and the motor output end into the first coupling and the second coupling respectively, thus reducing assembly time and production costs.

[0022] 2. Simply insert the fixed end of the lead screw into the first mounting part, and then tighten the screw through the through hole to clamp the lead screw in the first mounting part, thereby fixing the lead screw and making the installation of the lead screw convenient.

[0023] 3. The spacer can prevent friction between the gear set and the second housing when the gear set rotates. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other embodiments can be obtained based on these drawings without creative effort.

[0025] In the diagram:

[0026] Figure 1 This is a cross-sectional schematic diagram of the reducer according to an embodiment of this application;

[0027] Figure 2 This is a schematic diagram of the reducer according to an embodiment of this application;

[0028] Figure 3 This is an exploded view of the reducer according to an embodiment of this application;

[0029] Figure 4 This is a plan view of the reducer from one side of the first housing according to an embodiment of this application;

[0030] Figure 5 This is a plan view of the reducer in the embodiment of this application from one side of the second housing.

[0031] Reference numerals: 101, First housing; 102, Second housing; 103, Internal gear ring; 104, Second coupling; 105, Second bearing; 106, Spacer; 107, Central gear; 108, Planetary gear; 109, Mounting bracket; 110, Mounting shaft; 111, Third bearing; 112, First coupling; 121, First mounting part; 122, Opening groove; 123, First connecting part; 113, First bearing; 114, Fourth bearing; 115, Mounting bolt; 116, Fixing bolt; 117, Dust cover; 201, Motor; 202, Lead screw; 203, Fixing nut. Detailed Implementation

[0032] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0033] This application discloses a speed reducer. (Refer to...) Figure 1 The reducer includes a first housing 101, a second housing 102 and an internal gear ring 103, which are connected in sequence.

[0034] Reference Figure 2 In some embodiments, both the first housing 101 and the second housing 102 have through holes. In this embodiment, both the first housing 101 and the second housing 102 have four through holes, and their positions correspond one-to-one. The internal gear ring 103 has threaded holes, which are corresponding to the through holes. During installation, the fixing bolts 116 are inserted through the through holes of the first housing 101 and the second housing 102 and then screwed into the threaded holes. The first housing 101 has protrusions for aligning with the holes in the frame. The first housing 101 fits against the frame to achieve the axial positioning of the reducer, and the first housing 101 is fixed to the frame with screws.

[0035] Continue to refer to Figure 1 It also includes a gear set, a first coupling 112, a first bearing 113, a second coupling 104, and a second bearing 105. The gear set is installed in the internal gear ring 103; the first coupling 112 is installed inside the first bearing 113, which is installed inside the first housing 101. One end of the first coupling 112 is used to cooperate with the fixed end of the lead screw 202, and the other end is used to cooperate with the gear set; the second coupling 104 is installed inside the second bearing 105, which is installed inside the second housing 102. One end of the second coupling 104 is used to cooperate with the output end of the motor 201, and the other end is used to cooperate with the gear set.

[0036] By integrating the first coupling 112 and the second coupling 104 into the first housing 101 and the second housing 102 respectively, and directly engaging with the gear set, the additional coupling installation space in traditional reducers is eliminated, reducing the length of the transmission structure. This makes it particularly suitable for small equipment and space-constrained scenarios. Furthermore, its simple structure and easy installation reduce assembly time and production costs.

[0037] Reference Figure 3 In some embodiments, the first coupling 112 includes a first mounting portion 121, which has an opening and closing groove 122. Connecting holes are formed on both sides of the opening and closing groove 122, and a mounting bolt 115 passes through one connecting hole and is screwed into the other connecting hole. When the fixing bolt 116 is not installed, the opening and closing groove 122 allows the first mounting portion 121 to open, facilitating the insertion of the lead screw 202. The first housing 101 has a through hole corresponding to the connecting hole. During installation, the fixed end of the lead screw 202 is inserted into the first mounting portion 121, and the mounting bolt 115 is inserted into the connecting hole along the through hole, securing the lead screw 202 to the first mounting portion 121. When the mounting bolt 115 is engaged, the gap in the opening and closing groove 122 decreases, allowing the first mounting portion 121 to clamp the lead screw 202, thus facilitating stable installation of the lead screw 202.

[0038] In this embodiment, one opening groove 122 is provided on each of the two symmetrical sides of the first mounting portion 121. Connecting holes are provided corresponding to the opening grooves 122, and the two sets of connecting holes are used to install bolts 115 in opposite directions. That is, one of the connecting holes in one set has a thread for screwing the bolt 115. The threaded connecting holes in the two sets are located on opposite sides of the opening groove 122. In other words, if one mounting bolt 115 passes downward through one connecting hole and is screwed into the other, the other mounting bolt 115 passes upward through one connecting hole and is screwed into the other. The through hole of the first housing 101 is located corresponding to the installation direction of the fixing bolt 116.

[0039] In some embodiments, the second coupling 104 includes a second mounting portion, which has an opening and closing groove 122. Connecting holes are formed on both sides of the opening and closing groove 122, and a mounting bolt 115 passes through one connecting hole and is screwed into the other connecting hole. A through hole corresponding to the connecting hole is formed on the second housing 102. During installation, the output end of the motor 201 is inserted into the second mounting portion, and the output end of the motor 201 is fixed by locking the second mounting portion with the mounting bolt 115. In this embodiment, the opening method of the opening and closing groove 122 and the connecting hole in the second coupling 104 is the same as that in the first coupling 112, and the position of the through hole in the second housing 102 is also the same as that in the first housing 101, which will not be described in detail here.

[0040] Reference Figure 4 and Figure 5 In some embodiments, a dust cover 117 is also included, which covers the through hole. The through holes of the first housing 101 and the second housing 102 are both covered with dust covers 117. When it is necessary to tighten the fixing bolts 116, the dust cover 117 is removed. After tightening is completed, the dust cover 117 is put on to prevent foreign objects from entering the deceleration chamber and affecting the operation of the mechanism.

[0041] Refer again Figure 1 and Figure 3 In some embodiments, the gear set includes a central gear 107, multiple meshing planetary gears 108, a mounting shaft 110, a third bearing 111, and a mounting frame 109. In this embodiment, three planetary gears 108 are provided, and their center points are connected to form an equilateral triangle after meshing. One end of the central gear 107 is installed in the second coupling 104, and the other end meshes with the planetary gears 108. The planetary gears 108 mesh with the internal gear ring 103. The mounting shaft 110 is installed in the third bearing 111. The third bearings 111 are installed in the planetary gears 108. In this embodiment, six third bearings 111 are provided, with one planetary gear 108 corresponding to two third bearings 111, located near the sides of the planetary gears 108. The number of mounting shafts 110 corresponds to the number of planetary gears 108. The shaft passes through the third bearing 111 on one side of the planetary gear 108 and then through the third bearing 111 on the other side. The mounting shaft 110 and the first coupling 112 are both mounted on the mounting frame 109.

[0042] In some embodiments, the mounting bracket 109 has a first mounting hole at its center and second mounting holes distributed around the circumference of the first mounting hole; the first coupling 112 includes a first connecting part 123, the diameter of the first connecting part 123 is smaller than the diameter of the first mounting part 121, the first connecting part 123 passes through the first bearing 113 and is installed in the first mounting hole, and the mounting shafts 110 are installed in the second mounting holes one by one.

[0043] Motor 201 drives the second coupling 104 to rotate the central gear 107, which in turn drives the planetary gear 108, mounting shaft 110, and mounting bracket 109 to rotate. The gear set reduces the rotational motion output by motor 201 and increases torque. The mounting bracket 109 transmits the rotational motion to the first coupling 112 and outputs it to the lead screw 202. The lead screw 202 converts the rotational motion into linear motion. With the assistance of the first bearing 113, second bearing 105, and third bearing 111, energy loss and heat generation are reduced, and the efficiency of kinetic energy transmission is improved. In actual use, the lead screw 202 is paired with the fixing nut 203 to achieve linear motion; this is existing technology and will not be elaborated upon here.

[0044] In some embodiments, a spacer 106 is further included, which is installed between the second housing 102 and the gear set. In this embodiment, the spacer 106 has a through hole in its center, through which the central gear 107 passes and is fixed to the second coupling 104. Installing the spacer 106 between the second housing 102 and the gear set avoids friction between the gear set and the second housing 102 during rotation, and also avoids friction between the gear set and the second coupling 104 and the second bearing 105.

[0045] In some embodiments, a fourth bearing 114 is further included. The fourth bearing 114 and the first bearing 113 are installed side by side in the first housing 101. During installation, the fixed end of the lead screw 202 is connected to the second coupling 104 via the fourth bearing 114 and the first bearing 113. In this embodiment, the fourth bearing 114 is an angular contact ball bearing, and the lead screw 202 and the fourth bearing 114 are interference-fitted, which can further ensure the parallelism between the axis of the lead screw 202 and the transmission direction.

[0046] The implementation principle of a speed reducer according to an embodiment of this application is as follows: by integrating the first coupling 112 and the second coupling 104 into the first housing 101 and the second housing 102 respectively, and directly cooperating with the gear set, the additional coupling installation space in traditional speed reducers is eliminated; the direct cooperation between the first coupling 112 and the fixed end of the lead screw 202, and the direct cooperation between the second coupling 104 and the output end of the motor 201, further reduces the overall length of the transmission structure and the installation space requirements, making it particularly suitable for small equipment and space-constrained scenarios; at the same time, during installation, it is only necessary to install the output ends of the lead screw 202 and the motor 201 into the first coupling 112 and the second coupling 104 respectively, thus reducing assembly time and production costs.

[0047] The above are exemplary embodiments disclosed in this invention. However, it should be noted that various changes and modifications can be made without departing from the scope of the embodiments of this invention as defined by the claims. The functions, steps, and / or actions of the methods according to the disclosed embodiments described herein do not need to be performed in any particular order. Furthermore, although the elements disclosed in the embodiments of this invention may be described or claimed individually, they may be understood as multiple unless explicitly limited to a singular number.

[0048] It should be understood that, as used herein, the singular form "a" is intended to include the plural form as well, unless the context clearly supports an exception. It should also be understood that, as used herein, "and / or" refers to any and all possible combinations of one or more of the associatedly listed items. The embodiment numbers disclosed above are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0049] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the invention (including the claims) is limited to these examples. Within the framework of the invention, technical features of the above embodiments or different embodiments can be combined, and many other variations of different aspects of the invention exist, which are not provided in the details for the sake of brevity. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the invention should be included within the protection scope of the invention.

Claims

1. A speed reducer characterized by: The application relates to a transmission mechanism, which comprises a first shell, a second shell, an inner tooth ring, a gear set, a first coupling, a first bearing, a second coupling and a second bearing; the first shell, the inner tooth ring and the second shell are sequentially connected; The gear set is installed in the inner tooth ring; one end of the first coupling is used for cooperating with a fixed end of a lead screw, and the other end is used for cooperating with the gear set; the first coupling is installed in the first bearing, and the first bearing is installed in the first shell; The second coupling is installed in the second bearing, and the second bearing is installed in the second shell; one end of the second coupling is used for cooperating with an output end of a motor, and the other end is used for cooperating with the gear set.

2. A speed reducer according to claim 1, characterized in that: The first coupling comprises a first mounting part, the first mounting part is provided with an opening and closing groove, and connecting holes penetrating each other are formed on the two sides of the opening and closing groove; a mounting bolt is screwed into the connecting hole on one side and screwed into the connecting hole on the other side; the first shell is provided with through holes corresponding to the connecting holes; during installation, the fixed end of the lead screw is inserted into the first mounting part, and the first mounting part is locked by the mounting bolt to fix the lead screw.

3. A speed reducer according to claim 1, characterized in that: The second coupling comprises a second mounting part, the second mounting part is provided with an opening and closing groove, and connecting holes penetrating each other are formed on the two sides of the opening and closing groove; a mounting bolt is screwed into the connecting hole on one side and screwed into the connecting hole on the other side; the second shell is provided with through holes corresponding to the connecting holes; during installation, the output end of the motor is inserted into the second mounting part, and the second mounting part is locked by the mounting bolt to fix the output end of the motor.

4. A speed reducer according to claim 2 or 3, characterised in that: The transmission mechanism further comprises a dust cover, and the dust cover covers the through holes.

5. The speed reducer of claim 1, wherein: The gear set comprises a central gear, a plurality of mutually meshing planetary gears, a mounting shaft, a third bearing and a mounting frame; one end of the central gear is installed in the second coupling, and the other end is meshed between the planetary gears; the planetary gears are meshed in the inner tooth ring; the mounting shaft is installed in the third bearing, and the third bearing is installed in the planetary gears; the mounting shaft and the first coupling are both installed in the mounting frame.

6. A speed reducer according to claim 5, characterized in that: The mounting frame is provided with a first mounting hole in the center and a plurality of second mounting holes distributed along the circumference of the first mounting hole; the first coupling comprises a first connecting part, the first connecting part penetrates the first bearing and is installed in the first mounting hole, and the mounting shaft is installed in the second mounting hole.

7. The speed reducer of claim 1, wherein: The first shell and the second shell are both provided with through holes, the inner tooth ring is provided with threaded holes, and fixing bolts are screwed into the threaded holes after penetrating the through holes of the first shell and the second shell.

8. The speed reducer of claim 1, wherein: The transmission mechanism further comprises a spacer, and the spacer is installed between the second shell and the gear set.

9. The speed reducer of claim 1, wherein: The transmission mechanism further comprises a fourth bearing, and the fourth bearing is installed in the first shell; during installation, the fixed end of the lead screw is connected to the second coupling through the fourth bearing.

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