Injection molding part gear ring convenient and rapid to position

Abstract

The utility model relates to the technical field of gear ring structures, in particular to an injection-molded part gear ring convenient and quick to position, which comprises an outer ring, a first inner ring and a second inner ring, and is characterized in that the outer ring is made of plastic, the first inner ring and the second inner ring are made of metal, a circular ring is fixedly connected to the inner wall of the outer ring, and the inner wall of the circular ring is fixedly connected with the outer ring. A plurality of through holes are formed in the side face of the circular ring, positioning holes are formed in the side face of the first inner ring, threaded holes are formed in the side face of the second inner ring, bolts are inserted into the positioning holes, and the bolts penetrate through the positioning holes and the through holes to be in threaded connection with the threaded holes. The outer ring has the advantages that after the outer ring is damaged, the bolts are taken out, the first inner ring and the second inner ring can be taken out from the outer ring, then a new outer ring is placed between the two inner rings, the two inner rings are inserted into the outer ring from the two sides of the outer ring respectively, and finally the bolts are used for fixing, only the outer ring needs to be replaced, operation is simple, time and labor are saved, and the working efficiency is improved. Therefore, the later maintenance cost is low.

Description

Technical Field

[0001] The utility model relates to the technical field of gear ring structures, in particular to an injection molded gear ring which can be positioned conveniently and quickly. Background Art

[0002] Injection molding is a processing method used in mass production of certain complex-shaped parts. Specifically, it refers to the process of injecting heated and melted plastic into the mold cavity under high pressure by the injection molding machine, and then cooling and solidifying to obtain a molded product. With the development of injection molding technology, the structure combining injection molding and metal has gradually been applied to various technical fields. Plastic injection molding has a simple structure and is light in weight, and is suitable for fields where the strength requirements of gears are not particularly high.

[0003] An injection-molded gear ring structure is disclosed in Chinese patent CN210290647U. The injection-molded gear ring structure is composed of a plastic outer ring gear structure and an inner ring metal structure formed by injection molding. The processing technology is simple, less material waste is caused, and a groove structure is used to fix the outer ring gear and the inner ring metal through the groove structure during the molding process. When the gear ring rotates, the inner ring and the outer ring do not rotate relative to each other. Compared with the traditional adhesive structure, the fixing reliability is greatly improved. However, while solving the problem, the injection-molded gear ring structure has the following defects:

[0004] The outer ring of plastic material has poor rigidity and is therefore easy to wear. If the outer ring is damaged later, there are two ways to repair it. One method is to directly replace the entire gear ring. The advantage of this method is high efficiency. The disadvantage is that the undamaged metal inner ring also needs to be replaced, which wastes materials and leads to high material costs. Another method is to remove the damaged outer ring and replace it with a new one. However, since the damaged outer ring is directly injection molded onto the surface of the inner ring and is tightly connected, it is time-consuming and labor-intensive to disassemble. When assembling the new outer ring, the groove structure is tightly connected, making installation more difficult, resulting in high labor costs and making repairs uneconomical. Summary of the invention

[0005] The purpose of the utility model is to solve at least one of the technical defects described in the background technology.

[0006] Therefore, one purpose of the utility model is to provide an injection molded gear ring that is convenient and quick to position, aiming to solve the problem of high cost in repairing the injection molded gear ring structure in the prior art.

[0007] In order to achieve the above-mentioned purpose, an embodiment of one aspect of the utility model provides an injection molded gear ring that is convenient and quick to position, including an outer ring, a first inner ring and a second inner ring, and is characterized in that the outer ring is made of plastic, the first inner ring and the second inner ring are made of metal, the inner wall of the outer ring is fixedly connected with a circular ring, a plurality of through holes are provided on the side of the circular ring, a positioning hole is provided on the side of the first inner ring, a threaded hole is provided on the side of the second inner ring, a bolt is inserted into the inside of the positioning hole, and the bolt passes through the positioning hole and the through hole and is threadedly connected to the threaded hole.

[0008] Preferably, any of the above schemes is that a plurality of positioning grooves are provided on both sides of the circular ring, and one side of the first inner ring and one side of the second inner ring are fixedly connected with positioning strips, and the positioning strips are inserted into the interior of the positioning grooves to enhance the firmness of the connection between the inner ring and the circular ring, and the positioning grooves and positioning strips are in the shape of prisms, and the side surfaces of the prisms are inclined, thereby facilitating the insertion of the positioning strips into the positioning grooves.

[0009] Preferably, the top and bottom surfaces of the positioning groove are similar trapezoids, and the upper sides of the top and bottom surfaces of the trapezoid are close to the inner wall of the circular ring, and the lower sides of the top and bottom surfaces of the trapezoid are close to the inner wall of the outer ring, and the length of the upper side is smaller than the length of the lower side. When the circular ring of the plastic material expands outward due to heat, the positioning strip can provide pulling force to the positioning groove to limit the expansion of the circular ring, thereby indirectly providing inward pulling force to the outer ring of the plastic material to limit the expansion of the outer ring.

[0010] Preferably, any of the above schemes has chamfers on both sides of the inner wall of the outer ring, and the outer surfaces of the first inner ring and the second inner ring are fixedly connected with pressure rings matching the chamfers, and the pressure rings clamp the outer ring to avoid the problem of the outer ring deforming outward due to long-term use.

[0011] Compared with the prior art, the advantages and beneficial effects of the utility model are:

[0012] 1. When the outer ring is damaged, you only need to replace the outer ring, which is simple to operate, saves time and effort, and thus reduces the subsequent maintenance cost.

[0013] 2. By setting the positioning strip and the positioning groove, the positioning strip and the positioning groove are engaged and stressed, so that the shear force on the bolt is small, avoiding the problem of bolt breakage.

[0014] 3. By setting the positioning groove and the positioning strip to be in the shape of a prism, and the side of the prism is an inclined surface, the inclined surface can play a guiding role when the positioning strip is inserted into the positioning groove, thereby facilitating the alignment and insertion of the positioning strip with the positioning groove.

[0015] 4. The top and bottom surfaces of the positioning groove are similar trapezoids, and the shape and size of the positioning strip are adapted to the positioning groove. Therefore, after the positioning strip is inserted into the positioning groove, it can limit the expansion of the ring, thereby indirectly providing tension to the outer ring through the ring, limiting the expansion of the outer ring, and improving the stability of the gear ring structure.

[0016] 5. The pressure ring clamps and fixes the chamfer of the outer ring, thereby achieving the purpose of clamping and fixing the outer ring, thereby avoiding the problem of deformation of the overlapping part of the outer ring and the inner ring to the outside, and improving the stability of the outer ring.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description and in part will become apparent from the following description or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1 It is a structural schematic diagram according to the utility model.

[0020] Figure 2 It is a schematic diagram of the exploded structure according to the utility model.

[0021] Figure 3 It is a schematic diagram of the structure of the outer ring according to the utility model.

[0022] Figure 4 It is a schematic structural diagram of the first inner ring according to the utility model.

[0023] Figure 5 It is a schematic structural diagram of the second inner ring according to the utility model.

[0024] Among them: 1. outer ring, 11. circular ring, 12. through hole, 13. positioning groove, 14. chamfer, 2. first inner ring, 21. positioning hole, 22. groove, 3. second inner ring, 31. threaded hole, 4. positioning strip, 5. pressure ring, 6. bolt, 7. fixing hole. DETAILED DESCRIPTION

[0025] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0026] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it 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 it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] The utility model provides an injection molded gear ring which can be positioned conveniently and quickly. Embodiment 1

[0028] like Figure 1-5 As shown, it includes an outer ring 1 made of plastic, a first inner ring 2 made of plastic and a second inner ring 3 made of plastic. The inner wall of the outer ring 1 is fixedly connected with a circular ring 11. The outer ring 1 and the circular ring 11 are formed by integral injection molding. A plurality of through holes 12 are provided on the side of the circular ring 11. A positioning hole 21 is provided on the side of the first inner ring 2. A threaded hole 31 is provided on the side of the second inner ring 3. Bolts 6 are inserted into the interior of the positioning holes 21. The bolts 6 penetrate through the positioning holes 21 and the through holes 12 and are threadedly connected with the threaded holes 31. The first inner ring 2 and the second inner ring 3 clamp and fix the circular ring 11, thereby assembling and connecting the first inner ring 2 and the second inner ring 3 made of metal with the outer ring 1 made of plastic.

[0029] Specifically, a groove 22 is provided on the side surface of the first inner ring 2 at a position corresponding to the positioning hole 21 , and the head of the bolt 6 is located in the groove 22 , so as not to protrude from the side surface of the first inner ring 2 .

[0030] Specifically, the side surfaces of the first inner ring 2 and the second inner ring 3 are both provided with a plurality of fixing holes 7 for connecting with an external rotating mechanism. Embodiment 2

[0031] like Figure 3-5 As shown, on the basis of embodiment 1, a plurality of positioning grooves 13 are provided on both sides of the circular ring 11, and a positioning bar 4 is fixedly connected to one side of the first inner ring 2 and one side of the second inner ring 3. After the first inner ring 2 and the second inner ring 3 are clamped on both sides of the circular ring 11, the positioning bar 4 is inserted into the inside of the positioning groove 13 to strengthen the connection strength between the inner ring and the circular ring 11, so that when the inner ring is rotated, the positioning bar 4 and the positioning groove 13 are meshed and subjected to force, driving the circular ring 11 to rotate, thereby causing the outer ring 1 to rotate synchronously, so that the shear force on the bolt 6 is small, thereby avoiding the problem of bolt 6 breaking.

[0032] Preferably, the positioning groove 13 and the positioning strip 4 are shaped like a prism, the upper and lower surfaces of the prism are parallel, and the side surfaces are inclined surfaces, so that when the positioning strip 4 is inserted into the positioning groove 13, the inclined surface can play a guiding role, thereby facilitating the alignment and insertion of the positioning strip 4 with the positioning groove 13.

[0033] Further preferably, the top and bottom surfaces of the positioning groove 13 are similar trapezoids, and the upper edges of the top and bottom surfaces of the trapezoids are close to the inner wall of the ring 11, such as Figure 3 As shown, the upper edge of the top surface of the positioning groove 13 is a, and the upper edge of the bottom surface of the positioning groove 13 is c, that is, the upper edge a of the top surface and the upper edge c of the bottom surface are close to the inner wall of the ring 11, and the lower edges of the top surface and the bottom surface of the trapezoid are close to the inner wall of the outer ring 1, as shown in FIG. Figure 3 As shown, the lower side of the top surface of the positioning groove 13 is b, and the lower side of the bottom surface of the positioning groove 13 is d, that is, the lower side b of the top surface of the positioning groove 13 and the lower side d of the bottom surface are close to the inner wall of the outer ring 1, and the upper side length is smaller than the lower side length, that is, a is smaller than b, and c is smaller than d. The shape and size of the positioning strip 4 are adapted to the positioning groove 13, so that after the positioning strip 4 is inserted into the positioning groove 13, when the ring 11 expands outward due to heat, the positioning strip 4 can provide a tightening tension to the ring 11 through the positioning groove 13 to limit its expansion, thereby indirectly providing a tension to the outer ring 1 through the ring 11 to limit the expansion of the outer ring 1. Embodiment 3

[0034] like Figure 2-5 As shown, on the basis of Example 1 or Example 2, chamfers 14 are provided on both sides of the inner wall of the outer ring 1, and the outer surfaces of the first inner ring 2 and the second inner ring 3 are fixedly connected with pressure rings 5 ​​adapted to the chamfers 14. The pressure ring 5 clamps and fixes the chamfer 14 of the outer ring 1, thereby achieving the purpose of clamping and fixing the outer ring 1, thereby avoiding the problem of deformation of the overlapping portion of the outer ring 1 and the inner ring to the outside, and the inner ring does not protrude from the outside of the outer ring 1.

[0035] The working principle of the utility model is as follows: during maintenance, if the outer ring 1 is damaged, the bolt 6 can be rotated and unscrewed from the threaded hole 31, so that the first inner ring 2 and the second inner ring 3 can be pulled out from both sides of the outer ring 1, and then the new outer ring 1 is placed between the two inner rings, so that the two inner rings are inserted into the inside from both sides of the outer ring 1, and the positioning strip 4 is inserted into the positioning groove 13 of the ring 11, and then the bolt 6 is inserted into the positioning hole 21, and penetrates the through hole 12 and is threadedly connected with the threaded hole 31, thereby completing the maintenance and replacement of the outer ring 1.

[0036] Compared with the prior art, the present invention has the following beneficial effects:

[0037] 1. When the outer ring 1 is damaged, take out the bolt 6, then the first inner ring 2 and the second inner ring 3 can be taken out from the outer ring 1, and then the new outer ring 1 is put between the two inner rings, so that the two inner rings are inserted into the inner part from both sides of the outer ring 1, and finally fixed with the bolt 6. Only the outer ring 1 needs to be replaced, and the operation is simple, saving time and effort, so that the later maintenance cost is low.

[0038] 2. By setting the positioning strip 4 and the positioning groove 13, after the first inner ring 2 and the second inner ring 3 are clamped on both sides of the circular ring 11, the positioning strip 4 is inserted into the inside of the positioning groove 13 to strengthen the connection strength between the inner ring and the circular ring 11, so that when the inner ring is rotated, the positioning strip 4 and the positioning groove 13 are engaged and driven to rotate the circular ring 11, so that the outer ring 1 rotates synchronously, so that the shear force on the bolt 6 is small, avoiding the problem of bolt 6 breaking.

[0039] 3. By setting the positioning groove 13 and the positioning strip to be in the shape of a prism, with the upper and lower surfaces of the prism parallel and the side surfaces being inclined, the inclined surface can play a guiding role during the insertion of the positioning strip 4 into the positioning groove 13, thereby facilitating the alignment and insertion of the positioning strip 4 with the positioning groove 13.

[0040] 4. The top and bottom surfaces of the positioning groove 13 are similar trapezoids, and the shape and size of the positioning strip 4 are adapted to the positioning groove 13. Therefore, after the positioning strip 4 is inserted into the positioning groove 13, when the ring 11 expands outward due to heat, the positioning strip 4 can provide a tightening tension to the ring 11 through the positioning groove 13 to limit its expansion, thereby indirectly providing a tension to the outer ring 1 through the ring 11 to limit the expansion of the outer ring 1, thereby improving the stability of the gear ring structure.

[0041] 5. By opening chamfers 14 on both sides of the inner wall of the outer ring and arranging pressure rings 5 ​​on the two inner rings, the pressure rings 5 ​​clamp and fix the chamfers 14 of the outer ring 1, thereby achieving the purpose of clamping and fixing the outer ring 1, thereby avoiding the problem of deformation of the overlapping part of the outer ring 1 and the inner ring outward, and improving the stability of the outer ring 1.

Claims

1. An injection molded gear ring that is easy to position quickly, comprising an outer ring (1), a first inner ring (2) and a second inner ring (3), characterized in that: The outer ring (1) is made of plastic, the first inner ring (2) and the second inner ring (3) are made of metal, a circular ring (11) is fixedly connected to the inner wall of the outer ring (1), a plurality of through holes (12) are provided on the side of the circular ring (11), a positioning hole (21) is provided on the side of the first inner ring (2), a threaded hole (31) is provided on the side of the second inner ring (3), a bolt (6) is inserted into the inside of the positioning hole (21), and the bolt (6) passes through the positioning hole (21) and the through hole (12) and is threadedly connected to the threaded hole (31).

2. The injection molded gear ring for convenient and quick positioning according to claim 1, characterized in that: A groove (22) is provided on the side surface of the first inner ring (2) at a position corresponding to the positioning hole (21).

3. The injection molded gear ring for convenient and quick positioning according to claim 1, characterized in that: A plurality of fixing holes (7) are provided on the side surfaces of the first inner ring (2) and the second inner ring (3).

4. The injection molded gear ring for convenient and quick positioning according to claim 1, characterized in that: A plurality of positioning grooves (13) are provided on both sides of the circular ring (11); one side of the first inner ring (2) and one side of the second inner ring (3) are fixedly connected with positioning strips (4); the positioning strips (4) are inserted into the interior of the positioning grooves (13).

5. The injection molded gear ring for convenient and quick positioning according to claim 4, characterized in that: The positioning groove (13) and the positioning strip (4) are in the shape of a prism.

6. The injection molded gear ring for convenient and quick positioning according to claim 5, characterized in that: The top and bottom surfaces of the positioning groove (13) are similar trapezoids, and the upper sides of the top and bottom surfaces of the trapezoid are close to the inner wall of the ring (11), and the lower sides of the top and bottom surfaces of the trapezoid are close to the inner wall of the outer ring (1), and the length of the upper side is shorter than the length of the lower side.

7. The injection molded gear ring for convenient and quick positioning according to claim 1, characterized in that: Chamfers (14) are provided on both sides of the inner wall of the outer ring (1), and pressure rings (5) matching the chamfers (14) are fixedly connected to the outer surfaces of the first inner ring (2) and the second inner ring (3).

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