Speed reducer gear for injection molding machine

Abstract

The speed reducer gear for the injection molding machine comprises a main body, a gear assembly and a fixing mechanism, the main body comprises a mounting shaft, a fixing ring and connecting keys, the fixing ring is fixedly arranged on the outer side of the mounting shaft in a sleeved mode, two sets of key grooves are symmetrically formed in the outer side of the mounting shaft, and the two sets of connecting keys are embedded into the two sets of key grooves respectively. The gear assembly comprises two sets of half gears capable of being spliced into a complete gear, the two sets of half gears are in joggle joint with each other and are arranged on the outer side of the mounting shaft in a sleeving mode, clamping grooves penetrating front and back are axially formed in the inner sides of the two sets of half gears correspondingly, and the two sets of connecting keys are clamped into the two sets of clamping grooves correspondingly. The gear has the beneficial effects that the two groups of half gears are mutually spliced to form the complete gear, so that the whole mounting shaft does not need to be disassembled when the gear needs to be maintained or replaced subsequently, the working process is simplified, and compared with the prior art, the maintenance cost is reduced, and the maintenance efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molding machine accessories, in particular to a speed reducer gear for an injection molding machine. Background Technique

[0002] An injection molding machine is a mechanical device used to manufacture plastic products. Through the injection molding process, the plastic raw materials are heated and melted, and then the molten plastic is injected into the mold under high pressure, cooled and formed, and finally the plastic products with the required shape are produced. A speed reducer is a commonly used mechanical device for injection molding machines, mainly used to reduce the motor speed of the injection molding machine and increase the output torque to ensure precise control of various mechanical actions during the injection process.

[0003] The performance of the speed reducer directly affects the overall working efficiency and production accuracy of the injection molding machine. Usually, the gears inside the speed reducer need to be maintained or replaced regularly to ensure the long-term stable operation of the equipment. However, in the existing speed reducer design, replacing the gears requires disassembling the entire rotating shaft, resulting in a complex work process, long time consumption, and increased maintenance costs. Therefore, a speed reducer gear for an injection molding machine is proposed. Content of the Utility Model

[0004] The purpose of this part is to outline some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this part, as well as in the abstract and title of the specification of this application, to avoid obscuring the purpose of this part, the abstract of the specification, and the title of the utility model. However, such simplifications or omissions shall not be used to limit the scope of the utility model.

[0005] In view of the above problems of a speed reducer gear for an injection molding machine, the present utility model is proposed.

[0006] Therefore, the purpose of the present utility model is to provide a speed reducer gear for an injection molding machine, which is used to solve problems such as the need to disassemble the entire rotating shaft for maintaining or replacing gears in existing injection molding machines.

[0007] To solve the above technical problems, the present utility model provides the following technical solution: A speed reducer gear for an injection molding machine, comprising:

[0008] A main body, which includes a mounting shaft, a fixing ring, and a connection key. The fixing ring is fixedly sleeved outside the mounting shaft. Two groups of key grooves are symmetrically opened on the outside of the mounting shaft, and the two connection keys are respectively embedded in the two key grooves.

[0009] A gear assembly, which includes two half gears that can be assembled into a complete gear. The two half gears are mortised with each other and sleeved outside the mounting shaft. Axially through slots are opened in the inner sides of the two half gears in the front and rear directions, and the two connection keys are respectively snapped into the two slots.

[0010] A fixing mechanism, which includes a pressing ring and a pressing sleeve. Two sets of the pressing rings are sleeved outside the mounting shaft. The two sets of pressing rings are respectively located on both sides of the half gear and press against the half gear tightly. The pressing sleeve is sleeved outside the mounting shaft and is detachably connected to the mounting shaft. The pressing sleeve presses against one set of pressing rings away from the fixed ring, and one set of pressing rings close to the fixed ring presses against the fixed ring.

[0011] As a preferred solution of the reducer gear for an injection molding machine of the present utility model, wherein: Four positioning columns are fixedly connected to one side of each of the two sets of pressing rings close to the half gear. The four positioning columns on the two sets of pressing rings are evenly distributed annularly around the mounting shaft. Positioning circular grooves are opened at positions of the two half gears facing the respective positioning columns. Each of the positioning columns is inserted into the corresponding positioning circular groove.

[0012] As a preferred solution of the reducer gear for an injection molding machine of the present utility model, wherein: Three through holes are radially opened on the side wall of the pressing sleeve. Three countersunk bolts are fitted with the three through holes. Thread holes that fit the countersunk bolts are opened at positions of the mounting shaft facing the three through holes. The three countersunk bolts respectively pass through the three through holes and are screwed into the corresponding thread holes. The pressing sleeve is detachably connected to the mounting shaft 101 through the three countersunk bolts.

[0013] As a preferred solution of the reducer gear for an injection molding machine of the present utility model, wherein: The through holes are countersunk holes. The three through holes are evenly distributed around the pressing sleeve.

[0014] As a preferred solution of the reducer gear for an injection molding machine of the present utility model, wherein: T-shaped protrusions are provided on the splicing surfaces of the two half gears. The positions of the T-shaped protrusions of the two half gears are symmetrically arranged at the center. T-shaped grooves that fit the T-shaped protrusions are opened at positions of the two half gears facing the T-shaped protrusions. The two T-shaped protrusions are respectively inserted into the corresponding T-shaped grooves. The two half gears are mutually tenoned through the cooperation of the two T-shaped protrusions and the two T-shaped grooves.

[0015] As a preferred solution of the reducer gear for an injection molding machine of the present utility model, wherein: The axes of the mounting shaft, the fixed ring, the pressing ring and the pressing sleeve are coaxially arranged, and the mounting shaft and the fixed ring are integrally formed.

[0016] The beneficial effects of the present utility model: By arranging two half gears to be spliced with each other to form a complete gear, when the device needs to be maintained or the gear needs to be replaced later, it is not necessary to disassemble the entire mounting shaft, which simplifies the work process. Compared with the prior art, the maintenance cost is reduced and the maintenance efficiency is improved. Description of the Drawings

[0017] To more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings. Among them:

[0018] Figure 1 It is a three-dimensional structural schematic diagram of a speed reducer gear for an injection molding machine of the present utility model.

[0019] Figure 2 It is a disassembled structural schematic diagram of a speed reducer gear for an injection molding machine of the present utility model.

[0020] Figure 3 It is a partially disassembled structural schematic diagram of two groups of half gears of a speed reducer gear for an injection molding machine of the present utility model.

[0021] Description of the drawings: 100, main body; 101, mounting shaft; 101a, keyway; 102, fixing ring; 103, connecting key; 200, gear assembly; 201, half gear; 201a, positioning circular groove; 201b, T-shaped groove; 201c, clamping groove; 300, fixing mechanism; 301, abutting ring; 302, positioning column; 303, abutting sleeve; 304, countersunk head bolt. Detailed implementation manners

[0022] To make the above objects, features and advantages of the present utility model more obvious and understandable, the following will make a detailed description of the specific implementation manners of the present utility model in conjunction with the drawings of the specification.

[0023] Many specific details are set forth in the following description in order to fully understand the present utility model, but the present utility model can also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.

[0024] Secondly, the so-called "one embodiment" or "embodiment" herein refers to a specific feature, structure or characteristic that can be included in at least one implementation manner of the present utility model. The "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that excludes other embodiments.

[0025] Next, the present utility model will be described in detail with reference to the schematic diagrams. When describing the embodiments of the present utility model in detail, for the convenience of explanation, the cross-sectional views showing the device structure will be locally enlarged out of the general proportion, and the schematic diagrams are only examples and should not limit the scope of protection of the present utility model herein. In addition, in actual production, three-dimensional spatial dimensions including length, width, and depth should be included.

[0026] Referring to Figures 1 - 3 , an embodiment of the present utility model provides a reduction gear for an injection molding machine, which includes:

[0027] A main body 100, which includes a mounting shaft 101, a fixing ring 102, and a connecting key 103. The fixing ring 102 is fixedly sleeved outside the mounting shaft 101. Two groups of key grooves 101a are symmetrically opened on the outside of the mounting shaft 101, and two groups of connecting keys 103 are respectively embedded in the two groups of key grooves 101a;

[0028] A gear assembly 200, which includes two half gears 201 that can be assembled into a complete gear. The two half gears 201 are tenoned with each other and sleeved outside the mounting shaft 101. Axial through grooves 201c are opened in the inner sides of the two half gears 201 in the front-back direction, and the two groups of connecting keys 103 are respectively clamped into the two groups of grooves 201c;

[0029] A fixing mechanism 300, which includes a retaining ring 301 and a retaining sleeve 303. Two groups of retaining rings 301 are sleeved outside the mounting shaft 101. The two groups of retaining rings 301 are respectively located on both sides of the half gear 201 and press against the half gear 201. The retaining sleeve 303 is sleeved outside the mounting shaft 101 and is detachably connected to the mounting shaft 101. The retaining sleeve 303 presses against one group of retaining rings 301 away from the fixing ring 102, and one group of retaining rings 301 close to the fixing ring 102 presses against the fixing ring 102. Three through holes are radially opened on the side wall of the retaining sleeve 303, and three countersunk bolts 304 are fitted to the three through holes. Threaded holes that fit the countersunk bolts 304 are opened at positions on the mounting shaft 101 opposite to the three through holes. The three countersunk bolts 304 respectively pass through the three through holes and are screwed into the corresponding threaded holes, and the retaining sleeve 303 is detachably connected to the mounting shaft 101 through the three countersunk bolts 304.

[0030] Among them, four positioning columns 302 are fixedly connected to the side of each of the two retaining rings 301 close to the half gear 201. The four positioning columns 302 on the two retaining rings 301 are evenly distributed annularly around the mounting shaft 101. Positioning circular grooves 201a are opened at positions on the two half gears 201 opposite to the positioning columns 302. Each positioning column 302 is inserted into the corresponding positioning circular groove 201a. The positioning columns 302 are used to further improve the stability of the gear formed by splicing the two half gears 201.

[0031] In addition, the through holes are countersunk holes, and the three groups of through holes are equidistantly distributed around the abutting sleeve 303. T-shaped protrusions are provided on the splicing surfaces of the two groups of half gears 201, and the centers of the positions of the T-shaped protrusions of the two groups of half gears 201 are symmetrically arranged. T-shaped grooves 201b that fit with the T-shaped protrusions are provided at the positions of the two groups of half gears 201 opposite to the T-shaped protrusions. The two T-shaped protrusions are respectively inserted into the corresponding T-shaped grooves 201b, and the two groups of half gears 201 are mortised with each other through the cooperation of the two T-shaped protrusions and the two T-shaped grooves 201b.

[0032] It should be noted that the axes of the mounting shaft 101, the fixing ring 102, the abutting ring 301 and the abutting sleeve 303 are arranged to coincide, ensuring the structural stability. The mounting shaft 101 and the fixing ring 102 are integrally formed, and the integral formation is beneficial to ensuring the structural strength.

[0033] Working principle: During installation, as Figure 2 shown, after sleeving the abutting ring 301 arranged between the keyway 101a and the fixing ring 102 onto the mounting shaft 101, the two connecting keys 103 are respectively embedded into the two keyways 101a, and then the two groups of half gears 201 are sleeved onto the mounting shaft 101 after being spliced as shown in the figure. The two connecting keys 103 are respectively clamped into the two clamping grooves 201c, and then another abutting ring 301 is sleeved on. The four positioning posts 302 on the two abutting rings 301 are respectively inserted into the corresponding positioning circular grooves 201a, and finally the abutting sleeve 303 is sleeved on and three countersunk bolts 304 are screwed in to complete the installation;

[0034] When the half gears 201 need to be maintained or replaced, the three countersunk bolts 304 are unscrewed externally, and the abutting sleeve 303 and one abutting ring 301 close to the abutting sleeve 303 are slid in a direction away from the half gears 201, and then the two groups of half gears 201 can be disassembled as Figure 3 shown. After disassembly, the half gears 201 that need to be replaced can be removed for replacement. The mounting shaft 101 does not need to be removed during the maintenance and replacement process.

[0035] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A reducer gear for an injection molding machine, characterized in that: include: A main body (100) comprising a mounting shaft (101), a fixing ring (102) and a connecting key (103); the fixing ring (102) is fixedly sleeved on the outside of the mounting shaft (101); two groups of key grooves (101a) are symmetrically formed on the outside of the mounting shaft (101); and the two groups of connecting keys (103) are respectively embedded in the two groups of key grooves (101a); A gear assembly (200) comprising two groups of half gears (201) that can be assembled into a complete gear, the two groups of half gears (201) being mortise-jointed with each other and sleeved on the outside of a mounting shaft (101), the inner sides of the two groups of half gears (201) being axially provided with front-to-back through-cutting grooves (201c), and the two groups of connecting keys (103) being respectively inserted into the two groups of grooves (201c); The fixing mechanism (300) comprises a butt ring (301) and a butt sleeve (303). Two groups of the butt ring (301) are sleeved on the outside of the installation shaft (101). The two groups of the butt ring (301) are respectively located on both sides of the half gear (201) and press against the half gear (201). The butt sleeve (303) is sleeved on the outside of the installation shaft (101) and is detachably connected to the installation shaft (101). The butt sleeve (303) presses against a group of the butt rings (301) away from the fixing ring (102), and a group of the butt rings (301) close to the fixing ring (102) presses against the fixing ring (102).

2. A reducer gear for an injection molding machine according to claim 1, characterized in that: Four groups of positioning columns (302) are fixedly connected to one side of the two groups of the retaining rings (301) close to the half gears (201); the four groups of positioning columns (302) on the two groups of the retaining rings (301) are equidistantly distributed in a ring around the mounting shaft (101); the two groups of the half gears (201) and the positions of the positioning columns (302) facing each group are provided with positioning circular grooves (201a); and each group of the positioning columns (302) is respectively inserted into a corresponding positioning circular groove (201a).

3. The reducer gear for an injection molding machine according to claim 1, characterized in that: The side wall of the sleeve (303) is radially provided with three groups of through holes, each of which is equipped with a countersunk bolt (304). The mounting shaft (101) is provided with threaded holes that match the countersunk bolts (304) at positions opposite to the three groups of through holes. The three groups of countersunk bolts (304) pass through the three groups of through holes respectively and are screwed into the corresponding threaded holes. The sleeve (303) is detachably connected to the mounting shaft (101) via the three groups of countersunk bolts (304).

4. A reducer gear for an injection molding machine according to claim 3, characterized in that: The through holes are countersunk holes, and three groups of through holes are equidistantly distributed around the abutment sleeve (303).

5. The reducer gear for an injection molding machine according to claim 1, characterized in that: The splicing surfaces of the two groups of half gears (201) are both provided with T-shaped protrusions, the positions of the T-shaped protrusions of the two groups of half gears (201) are centrally symmetrically arranged, the positions of the two groups of half gears (201) facing the T-shaped protrusions are both provided with T-shaped grooves (201b) that fit with the T-shaped protrusions, the two groups of T-shaped protrusions are respectively inserted into corresponding T-shaped grooves (201b), and the two groups of half gears (201) are mutually mortise-jointed through the cooperation of the two groups of T-shaped protrusions and the two groups of T-shaped grooves (201b).

6. The reducer gear for an injection molding machine according to claim 1, characterized in that: The axes of the installation shaft (101), the fixing ring (102), the abutment ring (301) and the abutment sleeve (303) are arranged to coincide with each other, and the installation shaft (101) and the fixing ring (102) are integrally formed.

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