A gear center distance optimization structure and slide rail assembly

Abstract

The utility model provides a gear center distance optimization structure and a slide rail assembly, belonging to the technical field of transmission structure, including: a base frame, which is provided with a first positioning part and a second positioning part; a driving gear, which is provided with a third positioning part, the third positioning part is aligned with the first positioning part, and the driving gear is rotatably connected to the first positioning part through the third positioning part; a driven gear, which is provided with a fourth positioning part, the fourth positioning part is aligned with the second positioning part, and the driven gear is rotatably connected to the second positioning part through the fourth positioning part. The beneficial effect of the utility model is that the center distance tolerance of the driving gear and the driven gear is only related to the center distance tolerance of the first positioning part and the second positioning part and the size tolerance of each positioning part, the assembly tolerance deviation is almost zero, and the center distance tolerance is greatly optimized.

Description

Technical Field

[0001] The utility model belongs to the technical field of transmission structures and relates to a gear center distance optimization structure and a slide rail assembly. Background Art

[0002] Gears are precision transmission structures, and the smoothness of transmission is greatly affected by tolerance. When the gear center distance tolerance is large, vibration or even jamming will occur. For some gear structures with gears, such as electric slide rails for car seats, the smoothness of gear transmission will greatly affect the comfort experience of passengers. The main factor affecting the smoothness of gear transmission of slide rails is the gear center distance tolerance, and the main source of the gear center distance tolerance is the assembly tolerance.

[0003] In some existing technical solutions, for example, an electric slide rail, the driving gear is fixed on the motor, and the motor and the driven gear are respectively connected to the frame. The motor is directly fixed to the nuts on the frame by bolts. To ensure the assembly of the motor, the mounting hole of the motor is a through hole, and a gap is left between the bolt and the through hole. Therefore, the positioning accuracy of the motor is poor, which leads to an excessively large center distance tolerance between the driving gear and the driven gear, affecting the smoothness of the gear transmission. There is a large room for improvement. Summary of the invention

[0004] The utility model aims to solve the above problems in the prior art and proposes a gear center distance optimization structure and a slide rail assembly.

[0005] The purpose of the utility model can be achieved through the following technical solutions: a gear center distance optimization structure, comprising:

[0006] A base frame, which is provided with a first positioning portion and a second positioning portion;

[0007] A driving gear, which is provided with a third positioning portion, the third positioning portion is aligned with the first positioning portion, and the driving gear is rotatably connected to the first positioning portion through the third positioning portion;

[0008] The driven gear is provided with a fourth positioning portion, the fourth positioning portion is aligned with the second positioning portion, and the driven gear is rotatably connected to the second positioning portion through the fourth positioning portion.

[0009] In the above-mentioned gear center distance optimization structure, it also includes a positioning member, the first positioning part is set as a first positioning hole, the third positioning part is set as a first positioning groove, the positioning member can pass through the first positioning hole and form a first positioning protrusion, and the first positioning protrusion is inserted into the first positioning groove.

[0010] In the above-mentioned gear center distance optimization structure, the first positioning portion is configured as a second positioning protrusion, the third positioning portion is configured as a second positioning groove, and the second positioning protrusion is inserted into the second positioning groove.

[0011] In the above-mentioned center distance optimization structure between gears, the second positioning portion is configured as a positioning pin, the fourth positioning portion is configured as a second positioning hole, and the positioning pin passes through the second positioning hole.

[0012] In the above-mentioned gear center distance optimization structure, it also includes a bearing, and the driven gear is rotatably connected to the positioning pin through the bearing.

[0013] In the above-mentioned structure for optimizing the center distance between gears, the driven gear is provided with a receiving cavity, and the bearing is arranged in the receiving cavity.

[0014] In the above-mentioned gear center distance optimization structure, it also includes a motor, the motor is connected to the base frame, and the driving gear is connected to the output shaft of the motor.

[0015] In the above-mentioned gear center distance optimization structure, it also includes a shell, the driving gear is installed in the shell, and the motor is installed in the shell.

[0016] In the above-mentioned gear center distance optimization structure, it also includes a fastener, the base frame is also provided with a first mounting hole, the shell is provided with a second mounting hole, and the fastener can pass through the second mounting hole and be connected to the first mounting hole.

[0017] Secondly, a slide rail assembly includes the above-mentioned center distance optimization structure between gears.

[0018] Compared with the prior art, the beneficial effects of the utility model are:

[0019] 1. By positioning the first positioning part by the third positioning part and positioning the second positioning part by the fourth positioning part, the driving gear and the driven gear are positioned separately based on the base frame, so that the center distance tolerance of the driving gear and the driven gear is only related to the center distance tolerance of the first positioning part and the second positioning part and the size tolerance of each positioning part. The assembly tolerance deviation is almost zero, which greatly optimizes the center distance tolerance.

[0020] 2. The positioning member can pass through the first positioning hole and form a first positioning protrusion, the first positioning protrusion is inserted into the first positioning groove, the positioning member is installed through the first positioning hole, and the first positioning groove is positioned by the positioning member to realize the positioning of the base frame to the driving gear.

[0021] 3. The positioning pin passes through the second positioning hole to realize the positioning of the driven gear by the base frame.

[0022] 4. The fastener can pass through the second mounting hole and connect with the first mounting hole. Here, the fastener connects the base frame and the shell only for connection, not for positioning, and does not affect the assembly tolerance.

[0023] 5. The first positioning portion is set as the second positioning protrusion and the third positioning portion is set as the second positioning groove, and the positioning of the driving gear by the base frame is achieved by directly inserting the second positioning protrusion into the second positioning groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is an exploded view of the first embodiment of the present utility model.

[0025] Figure 2 This is a schematic structural diagram of the first embodiment of the present utility model.

[0026] Figure 3 This is a schematic diagram of the structure of the motor of the first embodiment of the utility model.

[0027] Figure 4 This is a schematic diagram of the assembly of the first embodiment of the present utility model.

[0028] Figure 5 This is an assembly diagram of the second embodiment of the present utility model.

[0029] Figure 6 It is a structural schematic diagram of the slide rail assembly of the utility model.

[0030] In the figure, 100, base frame; 111, first positioning hole; 112, second positioning protrusion; 120, positioning pin; 130, first mounting hole; 200, driving gear; 211, first positioning groove; 212, second positioning groove; 300, driven gear; 310, second positioning hole; 320, accommodating chamber; 400, positioning member; 500, bearing; 600, motor; 700, housing; 710, second mounting hole; 800, fastener. DETAILED DESCRIPTION

[0031] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0032] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0033] In addition, in the present invention, the descriptions of "first", "second", "one", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0034] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0036] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0037] Embodiment 1

[0038] like Figure 1-Figure 4 As shown, a gear center distance optimization structure includes: a base frame 100, a driving gear 200 and a driven gear 300.

[0039] The base frame 100 is provided with a first positioning portion and a second positioning portion.

[0040] The driving gear 200 is provided with a third positioning portion, the third positioning portion is aligned with the first positioning portion, and the driving gear 200 is rotatably connected to the first positioning portion through the third positioning portion.

[0041] The driven gear 300 is provided with a fourth positioning portion, the fourth positioning portion is aligned with the second positioning portion, and the driven gear 300 is rotatably connected to the second positioning portion through the fourth positioning portion.

[0042] In this embodiment, by positioning the first positioning portion by the third positioning portion and positioning the second positioning portion by the fourth positioning portion, the driving gear 200 and the driven gear 300 are respectively positioned with reference to the base frame 100, so that the center distance tolerance of the driving gear 200 and the driven gear 300 is only related to the center distance tolerance of the first positioning portion and the second positioning portion and the size tolerance of each positioning portion, and the assembly tolerance deviation is almost zero, thereby greatly optimizing the center distance tolerance.

[0043] like Figure 1-Figure 4 As shown, on the basis of the above embodiment, it also includes a positioning member 400, the first positioning portion is set as a first positioning hole 111, the third positioning portion is set as a first positioning groove 211, the positioning member 400 can pass through the first positioning hole 111 and form a first positioning protrusion, and the first positioning protrusion is inserted into the first positioning groove 211.

[0044] In this embodiment, the positioning member 400 can pass through the first positioning hole 111 and form a first positioning protrusion, the first positioning protrusion is inserted into the first positioning groove 211, the positioning member 400 is installed through the first positioning hole 111, and then the positioning member 400 positions the first positioning groove 211 to realize the positioning of the base frame 100 on the driving gear 200.

[0045] like Figure 1-Figure 4 As shown, on the basis of the above embodiment, the second positioning portion is configured as a positioning pin 120 , the fourth positioning portion is configured as a second positioning hole 310 , and the positioning pin 120 passes through the second positioning hole 310 .

[0046] In this embodiment, the positioning pin 120 passes through the second positioning hole 310 to achieve positioning of the driven gear 300 by the base frame 100 .

[0047] like Figure 1-Figure 4 As shown, on the basis of the above embodiment, a bearing 500 is further included, and the driven gear 300 is rotatably connected to the positioning pin 120 through the bearing 500 .

[0048] In this embodiment, the driven gear 300 is rotatably connected to the positioning pin 120 via the bearing 500, so that the sliding friction between the driven gear 300 and the positioning pin 120 is converted into rolling friction, and the rotation is smoother.

[0049] like Figure 1-Figure 4 As shown, on the basis of the above embodiment, the driven gear 300 is provided with a receiving cavity 320 , and the bearing 500 is disposed in the receiving cavity 320 .

[0050] In this embodiment, the second positioning hole 310 may be located on the side wall of the accommodating cavity 320 , and the second positioning hole 310 may be rotatably connected to the positioning pin 120 via a bearing 500 .

[0051] like Figure 1-Figure 4 As shown, based on the above embodiment, it further includes a motor 600 , the motor 600 is connected to the base frame 100 , and the driving gear 200 is connected to the output shaft of the motor 600 .

[0052] Specifically, it further includes a housing 700 , the driving gear 200 is installed in the housing 700 , and the motor 600 is installed in the housing 700 .

[0053] More specifically, a fastener 800 is further included. The base frame 100 is further provided with a first mounting hole 130 , and the housing 700 is provided with a second mounting hole 710 . The fastener 800 can pass through the second mounting hole 710 and be connected to the first mounting hole 130 .

[0054] In this embodiment, the fastener 800 can pass through the second mounting hole 710 and connect with the first mounting hole 130. Here, the fastener 800 connects the base frame 100 and the shell 700 only for connection, not positioning, and does not affect the assembly tolerance.

[0055] Embodiment 2

[0056] like Figure 5 As shown, other structures of the second embodiment are the same as those of the first embodiment, except that the first positioning portion is configured as a second positioning protrusion 112 , the third positioning portion is configured as a second positioning groove 212 , and the second positioning protrusion 112 is inserted into the second positioning groove 212 .

[0057] In this embodiment, the first positioning portion is set as the second positioning protrusion 112 and the third positioning portion is set as the second positioning groove 212 , and the base frame 100 positions the driving gear 200 directly by inserting the second positioning protrusion 112 into the second positioning groove 212 .

[0058] like Figure 1-6 As shown, a slide rail assembly includes the gear center distance optimization structure described in Example 1 or Example 2.

Claims

1. A gear center distance optimization structure, characterized in that: include: A base frame, which is provided with a first positioning portion and a second positioning portion; A driving gear, which is provided with a third positioning portion, the third positioning portion is aligned with the first positioning portion, and the driving gear is rotatably connected to the first positioning portion through the third positioning portion; The driven gear is provided with a fourth positioning portion, the fourth positioning portion is aligned with the second positioning portion, and the driven gear is rotatably connected to the second positioning portion through the fourth positioning portion.

2. The gear center distance optimization structure according to claim 1, characterized in that: It also includes a positioning member, the first positioning portion is set as a first positioning hole, the third positioning portion is set as a first positioning groove, the positioning member can pass through the first positioning hole and form a first positioning protrusion, and the first positioning protrusion is inserted into the first positioning groove.

3. The gear center distance optimization structure according to claim 1, characterized in that: The first positioning portion is configured as a second positioning protrusion, the third positioning portion is configured as a second positioning groove, and the second positioning protrusion is inserted into the second positioning groove.

4. The gear center distance optimization structure according to claim 1, characterized in that: The second positioning portion is configured as a positioning pin, the fourth positioning portion is configured as a second positioning hole, and the positioning pin passes through the second positioning hole.

5. The gear center distance optimization structure according to claim 4, characterized in that: A bearing is also included, and the driven gear is rotatably connected to the positioning pin through the bearing.

6. The gear center distance optimization structure according to claim 5, characterized in that: The driven gear is provided with an accommodating cavity, and the bearing is arranged in the accommodating cavity.

7. The gear center distance optimization structure according to claim 1, characterized in that: It also includes a motor, which is connected to the base frame, and the driving gear is connected to the output shaft of the motor.

8. The gear center distance optimization structure according to claim 7, characterized in that: It also includes a shell, the driving gear is installed in the shell, and the motor is installed in the shell.

9. The gear center distance optimization structure according to claim 8, characterized in that: It also includes a fastener, the base frame is further provided with a first mounting hole, the shell is provided with a second mounting hole, and the fastener can pass through the second mounting hole and be connected to the first mounting hole.

10. A slide rail assembly, characterized in that: It comprises a gear center distance optimization structure as described in any one of claims 1-9.

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