Speed reducer for ice maker

Abstract

The utility model discloses a reduction gear for an ice maker, which comprises a gear box shell, the gear box shell is provided with a power input end and a power output end, the driving force of the power input end is provided by a stator injection molding motor fixedly arranged on the gear box shell, and a plurality of reduction gear components are in transmission connection between the power input end and the power output end. The reduction gear assembly comprises a transmission shaft, a reduction gear connected to the transmission shaft and a bearing, the gearbox shell is provided with installation positions corresponding to the bearing, and reinforcing ribs are connected between the installation positions and the side wall of the gearbox shell and between the adjacent installation positions. The speed reducer has the effects of improving the running stability of the speed reduction gear assembly, reducing the running noise and prolonging the service life.

Description

Technical Field

[0001] The utility model relates to the technical field of ice making machines, in particular to a deceleration device for ice making machines. Background Art

[0002] The existing Chinese patent with announcement number CN202123455948 discloses a power gearbox that is convenient for automated assembly, which is characterized in that it includes a gearbox body, a power unit and N groups of reduction gear assemblies are arranged in the gearbox body, where N ≥ 2, the power unit is transmission-connected with the N groups of reduction gear assemblies, a circuit board is arranged in the power unit, and a window for exposing part of the circuit board is opened on the gearbox body; the gearbox body includes an upper cover and a lower cover, a first mounting position for mounting the power unit is formed on the upper cover, and a second mounting position for mounting the N groups of reduction gear assemblies is formed inside the upper cover after the upper cover and the lower cover are covered. The first mounting position is provided with a hollow column at the center thereof, and the hollow column connects the first mounting position and the second mounting position; the power unit comprises a stator, a rotor and a transmission shaft, the stator is interference-fitted on the outer periphery of the hollow column, the transmission shaft is fitted on the inner periphery of the hollow column through a bearing, the transmission shaft is fixedly connected to the rotor and rotates synchronously, the circuit board is located below the stator, and the window is located on the upper cover; the dynamic shaft is tightly fitted with the bearing, a first limiting surface for tightening the bearing is provided in the mounting groove, and a second limiting surface for tightening the bearing is provided in the hollow column, the first limiting surface and the second limiting surface limit the axial movement of the transmission shaft.

[0003] However, the above-mentioned gearbox has the following disadvantages: the bearings of the gearbox are installed in corresponding mounting grooves, and the existing upper cover and lower cover are relatively thin, so that the bearings are not supported enough when rotating, which will cause large vibrations in the bearing position and generate large noise. In addition, the gearbox with insufficient structural strength has a short service life and urgently needs to be improved. Utility Model Content

[0004] The purpose of the utility model is to provide a reduction gear device for an ice maker, which has the effects of improving the operating stability of a reduction gear assembly, reducing the operating noise of the reduction gear device, and extending the service life.

[0005] The above technical objectives of the present utility model are achieved through the following technical solutions: a deceleration device for an ice maker, comprising a gearbox housing, the gearbox housing being provided with a power input end and a power output end, the driving force of the power input end being provided by a stator injection molded motor fixedly mounted on the gearbox housing, a plurality of reduction gear assemblies being transmission-connected between the power input end and the power output end, the reduction gear assemblies comprising a transmission shaft, a reduction gear connected to the transmission shaft and a bearing, the gearbox housing being provided with a mounting position corresponding to the bearing, and reinforcing ribs being connected between the mounting position and the side wall of the gearbox housing and between adjacent mounting positions.

[0006] By adopting the above technical solution, the stator injection molding motor has the characteristics of high precision and sealing and low operating noise. The driving force is provided by the stator injection molding motor, and then the power output is provided under the deceleration action of the reduction gear assembly. The utility model sets a mounting position for the bearing of the reduction gear assembly on the gear box housing, and sets the bearing on the corresponding mounting position. At the same time, a plurality of reinforcing ribs are added between adjacent mounting positions and between the mounting position and the side wall of the gear box housing, so that the installation stability of the bearing in the mounting position is higher, thereby reducing the operating jitter of each reduction gear assembly in the gear box housing, thereby reducing the noise caused by the shaking of parts during the operation of the utility model, thereby extending the service life of the device, and having the effects of improving the operating stability of the reduction gear assembly, reducing the operating noise of the reduction device, and extending the service life.

[0007] The present invention is further configured as follows: the gearbox housing includes a first housing and a second housing; the transmission shaft is provided with bearings at both ends of the reduction gear; and the mounting positions are relatively arranged on the first housing and the second housing corresponding to the bearings.

[0008] By adopting the above technical solution, the bearings symmetrically arranged at both ends of the transmission shaft can make the rotation concentricity of the transmission shaft higher.

[0009] The utility model is further configured as follows: an installation groove is provided in the installation position corresponding to the bearing, an annular step is protruded from the bottom of the installation groove, the outer ring of the bearing abuts against the annular step, so that an avoidance gap is formed between the end of the transmission shaft and the bottom wall of the installation groove.

[0010] By adopting the above technical solution, the contact area between the transmission shaft and the gearbox housing can be reduced, thereby improving the smoothness of the transmission shaft rotation.

[0011] The present invention is further configured as follows: a fastener mounting portion is correspondingly provided between the first shell and the second shell, and a reinforcing rib is connected between the mounting position and the fastener mounting portion.

[0012] By adopting the above technical solution, the connection structural strength between the installation position and the corresponding first shell and second shell is further enhanced.

[0013] The present invention is further configured as follows: the stator injection molding motor and the gear box housing are detachably connected via a positioning structure, the positioning structure comprising a plurality of positioning lugs and fasteners, the plurality of positioning lugs extending radially are arranged on the outer wall of the stator injection molding motor, and the positioning lugs are fixedly connected to the gear box housing via corresponding fasteners.

[0014] By adopting the above technical solution, the utility model adds multiple positioning lugs around the stator injection molded motor, and then locks the positioning lugs to the gear box housing through fasteners. Different from the existing motor fixing method on the market in which threaded holes are directly opened on the end face of the motor housing and then the motor housing is directly screwed and fixed to the gear box housing with screws, the addition of multiple positioning lugs of the utility model is equivalent to indirectly increasing the travel distance between adjacent fasteners, which is beneficial to improving the installation firmness and operating stability of the stator injection molded motor.

[0015] The present invention is further configured as follows: the gearbox housing is provided with a positioning fitting portion corresponding to the positioning lug, and the positioning lug is locked and fixed to the corresponding positioning fitting portion by the corresponding fastener.

[0016] The present invention is further configured as follows: two positioning lugs are provided, and the two positioning lugs are symmetrically distributed on the side wall of the stator injection-molded motor.

[0017] By adopting the above technical solution, the arrangement of the two positioning lugs occupies less space, which can make the structure of the device more compact and improve the installation flexibility of the utility model in the ice maker.

[0018] The present invention is further configured as follows: the gearbox housing is provided with a plurality of positioning posts, and the end faces of the plurality of positioning posts and the positioning matching parts are on the same plane. When the positioning lugs are locked and fixed with the corresponding positioning matching parts, the stator injection molding motor is tightly positioned against the positioning posts.

[0019] By adopting the above technical solution, multiple positioning columns and positioning matching parts cooperate with each other to jointly realize the support and positioning of the stator injection molded motor, which can effectively improve the installation stability and anti-sway performance of the stator injection molded motor on the gearbox housing.

[0020] The present invention is further configured as follows: the power input end includes a helical gear shaft arranged at the output end of the stator injection molding motor, the stator injection molding motor is provided with an embedded portion around the helical gear shaft, the gear box housing is provided with an embedded matching portion corresponding to the embedded portion, and the embedded portion is plug-fitted with the embedded matching portion.

[0021] By adopting the above technical solution, the connection firmness between the stator injection molding motor and the gear box housing can be further improved.

[0022] The present invention is further configured as follows: the gearbox housing is provided with a water collecting groove around the power output end, and the gearbox housing is provided with a water leakage hole corresponding to the water collecting groove.

[0023] By adopting the above technical solution, short circuit caused by water accumulation on the top of the gear box housing can be effectively prevented.

[0024] In summary, the present invention has the following beneficial effects:

[0025] The motor is set as a stator injection molding motor, and the stator injection molding motor itself has the characteristics of high precision, high sealing and low operating noise. The stator injection molding motor is then used to provide driving force, and then the power output is provided under the deceleration action of the reduction gear assembly. The utility model sets a mounting position for the bearing of the reduction gear assembly on the gear box housing, and sets the bearing on the corresponding mounting position. At the same time, a plurality of reinforcing ribs are added between adjacent mounting positions and between the mounting position and the side wall of the gear box housing, so that the installation stability of the bearing in the mounting position is higher, thereby reducing the operating jitter of each reduction gear assembly in the gear box housing, thereby reducing the noise caused by the shaking of parts during the operation of the utility model, thereby extending the service life of the device, and having the effects of improving the operating stability of the reduction gear assembly, reducing the operating noise of the reduction device, and extending the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural diagram of a specific embodiment of the present utility model.

[0027] Figure 2 It is a longitudinal sectional view of a first specific embodiment of the present utility model.

[0028] Figure 3 This utility model Figure 1 A partial enlarged view of area A in the middle.

[0029] Figure 4 It is an exploded view of the first specific embodiment of the present utility model.

[0030] Figure 5 It is an exploded view of another perspective of a specific embodiment of the present invention.

[0031] Figure 6 It is a structural diagram of the first shell in the first specific embodiment of the present utility model.

[0032] Figure 7 It is a structural diagram of the second shell in the first specific embodiment of the present utility model.

[0033] Figure 8 It is an overall structural diagram of the second specific embodiment of the present utility model.

[0034] Figure 9 This is a structural diagram of a second specific embodiment of the present invention, wherein the stator injection molding motor is not shown.

[0035] In the figure: 1. Gearbox housing; 11. First housing; 12. Second housing; 13. Mounting position; 131. Mounting groove; 1311. Annular step; 1312. Avoidance gap; 14. Reinforcement rib; 15. Positioning fitting portion; 16. Embedding fitting portion; 17. Leakage hole; 18. Water collecting trough; 2. Stator injection-molded motor; 21. Positioning lug; 22. Fastener; 23. Helical gear shaft; 24. Embedding portion; 3. Reduction gear assembly; 31. Drive shaft; 32. Reduction gear; 33. Bearing; 4. Shock-absorbing seal ring. DETAILED DESCRIPTION

[0036] The present invention will be further described below with reference to the accompanying drawings. Specific embodiment 1

[0038] A deceleration device for an ice maker, such as Figure 1 and Figure 6-7 As shown, it includes a gearbox housing 1, which is provided with a power input end and a power output end. The driving force of the power input end is provided by a stator injection molding motor 2 fixed to the gearbox housing 1. A plurality of reduction gear assemblies 3 are connected between the power input end and the power output end. The reduction gear assembly 3 includes a transmission shaft 31, a reduction gear 32 connected to the transmission shaft 31, and a bearing 33. The gearbox housing 1 is provided with a mounting position 13 corresponding to the bearing 33, and a reinforcing rib 14 is connected between the mounting position 13 and the side wall of the gearbox housing 1 and between adjacent mounting positions 13. The gearbox housing 1 includes a first housing 11 and a second housing 12. The transmission shaft 31 is provided with bearings 33 at both ends of the reduction gear 32. The mounting position The corresponding bearings 33 are relatively arranged on the first shell 11 and the second shell 12, and the bearings 33 are symmetrically arranged at both ends of the drive shaft 31, which can make the rotation concentricity of the drive shaft 31 higher; the gearbox shell 1 is provided with a water collecting tank 18 around the power output end, and the gearbox shell 1 is provided with a leakage hole 17 corresponding to the water collecting tank 18, which can effectively prevent the short circuit caused by water accumulation on the top of the gearbox shell 1; in addition, a fastener mounting part 19 is provided between the first shell 11 and the second shell 12, and a reinforcing rib 14 is also connected between the mounting position 13 and the fastener mounting part 19, thereby further enhancing the connection structure strength between the mounting position 13 and the corresponding first shell 11 and the second shell 12.

[0039] like Figure 2-5As shown, the mounting position 13 is provided with a mounting groove 131 corresponding to the bearing 33, and an annular step 1311 is protruding from the bottom of the mounting groove 131. The outer ring of the bearing 33 abuts against the annular step 1311, so that an avoidance gap 1312 is formed between the end of the transmission shaft 31 and the bottom wall of the mounting groove 131, which can reduce the contact area between the transmission shaft 31 and the gearbox housing 1, thereby improving the smoothness of the rotation of the transmission shaft 31; a shock-absorbing sealing ring 4 is provided between the first housing 11 and the second housing 12, which can not only seal the assembly gap between the first housing 11 and the second housing 12, but also buffer and dampen the vibration generated during the operation of the device, thereby reducing the operating noise of the device.

[0040] like Figure 1-5 As shown, the stator injection molded motor 2 and the gear box housing 1 are detachably connected through a positioning structure, and the positioning structure includes a plurality of positioning lugs 21 and fasteners 22. The plurality of positioning lugs 21 extend radially and are arranged on the outer wall of the stator injection molded motor 2. The positioning lugs 21 are fixedly connected to the gear box housing 1 through corresponding fasteners 22. The utility model adds a plurality of positioning lugs 21 around the stator injection molded motor 2, and then locks the positioning lugs 21 to the gear box housing 1 through fasteners 22. This is different from the existing motor fixing method on the market in which threaded holes are directly opened on the end face of the motor housing and then the motor housing is directly screwed and fixed to the gear box housing 1 with screws. The addition of multiple positioning lugs 21 of the utility model is equivalent to indirectly increasing the travel distance between adjacent fasteners 22, which is beneficial to improving the installation firmness and operation stability of the stator injection molded motor 2; the gear box housing 1 corresponds to the positioning lugs 21 A positioning fitting portion 15 is provided, and a positioning lug 21 is locked and fixed to the corresponding positioning fitting portion 15 by a corresponding fastener 22; the corresponding contact surfaces of the several positioning lugs 21 and the positioning fitting portion 15 are all in the same horizontal plane; in this embodiment, there are three positioning lugs 21, and the three positioning lugs 21 are evenly spaced and distributed on the side wall of the stator injection molded motor 2, and the three positioning lugs 21 are arranged in a triangular shape around the stator injection molded motor 2. The triangular stability of the three positioning lugs 21 is utilized to improve the connection firmness between the stator injection molded motor 2 and the gear box housing 1; the power input end includes a helical gear shaft 23 arranged at the output end of the stator injection molded motor 2, and the stator injection molded motor 2 is provided with an embedded portion 24 around the helical gear shaft 23, and the gear box housing 1 is provided with an embedded fitting portion 16 corresponding to the embedded portion 24, and the embedded portion 24 is plugged into the embedded fitting portion 16, which can further improve the connection firmness between the stator injection molded motor 2 and the gear box housing 1.

[0041] The basic working principle of the present invention is: the motor is set as a stator injection molding motor 2, and the stator injection molding motor 2 itself has the characteristics of high precision, high sealing and low operating noise. The driving force is then provided by the stator injection molding motor 2, and then the power output is provided under the deceleration action of the reduction gear assembly 3. The present invention provides a mounting position 13 on the gear box housing 1 corresponding to the bearing 33 of the reduction gear assembly 3, and sets the bearing 33 on the corresponding mounting position 13. At the same time, a plurality of reinforcing ribs 14 are added between adjacent mounting positions 13 and between the mounting position 13 and the side wall of the gear box housing 1, so that the installation stability of the bearing 33 in the mounting position 13 is higher, thereby reducing the operating jitter of each reduction gear assembly 3 in the gear box housing 1, thereby reducing the noise caused by the shaking of parts during the operation of the present invention, thereby extending the service life of the device, and having the effects of improving the operating stability of the reduction gear assembly, reducing the operating noise of the reduction device, and extending the service life. Specific embodiment 2

[0043] A deceleration device for an ice maker, such as Figure 8-9 As shown, the difference between this embodiment and the specific embodiment 1 is that: in this embodiment, there are two positioning lugs 21, and the two positioning lugs 21 are symmetrically distributed on the side wall of the stator injection motor 2. The arrangement of the two positioning lugs 21 takes up less space, which can make the structure of the device more compact and improve the installation flexibility of the utility model in the ice maker; the gear box housing 1 is provided with a plurality of positioning columns 121, and the end faces of the plurality of positioning columns 121 and the positioning matching parts 15 are on the same plane. When the positioning lugs 21 are locked and fixed with the corresponding positioning matching parts 15, the stator injection motor 2 is tightly positioned against the positioning columns 121. The plurality of positioning columns 121 cooperate with the positioning matching parts 15 to jointly realize the support and positioning of the stator injection motor 2, which can effectively improve the installation stability and anti-sway performance of the stator injection motor 2 on the gear box housing 1.

[0044] The other structures of this embodiment are consistent with those of the first embodiment and will not be described again here.

[0045] The above description is only a preferred embodiment of the present invention. Therefore, any equivalent changes or modifications made according to the structure, features and principles described in the scope of the present invention patent application are included in the scope of the present invention patent application.

Claims

1. A speed reduction device for an ice maker, comprising a gear box housing (1), characterized in that: The gearbox housing (1) is provided with a power input end and a power output end. The driving force of the power input end is provided by a stator injection molding motor (2) fixed on the gearbox housing (1). A plurality of reduction gear assemblies (3) are connected in a transmission manner between the power input end and the power output end. The reduction gear assemblies (3) include a transmission shaft (31), a reduction gear (32) connected to the transmission shaft (31), and a bearing (33). The gearbox housing (1) is provided with a mounting position (13) corresponding to the bearing (33), and reinforcing ribs (14) are connected between the mounting position (13) and the side wall of the gearbox housing (1) and between adjacent mounting positions (13).

2. A deceleration device for an ice maker according to claim 1, characterized in that: The gearbox housing (1) comprises a first housing (11) and a second housing (12); the transmission shaft (31) is provided with bearings (33) at both ends of the reduction gear (32); and the mounting position (13) is relatively arranged on the first housing (11) and the second housing (12) corresponding to the bearings (33).

3. The deceleration device for an ice maker according to claim 1, characterized in that: The mounting position (13) is provided with a mounting groove (131) corresponding to the bearing (33); an annular step (1311) is protruded from the bottom of the mounting groove (131); the outer ring of the bearing (33) abuts against the annular step (1311), so that an avoidance gap (1312) is formed between the end of the transmission shaft (31) and the bottom wall of the mounting groove (131).

4. The deceleration device for an ice maker according to claim 2, characterized in that: A fastener mounting portion (19) is correspondingly provided between the first shell (11) and the second shell (12), and a reinforcing rib (14) is connected between the mounting position (13) and the fastener mounting portion (19).

5. The deceleration device for an ice maker according to claim 1, characterized in that: The stator injection molding motor (2) and the gear box housing (1) are detachably connected via a positioning structure, wherein the positioning structure comprises a plurality of positioning lugs (21) and fasteners (22), wherein the plurality of positioning lugs (21) are radially extended and arranged on the outer wall of the stator injection molding motor (2), and the positioning lugs (21) are fixedly connected to the gear box housing (1) via corresponding fasteners (22).

6. The deceleration device for an ice maker according to claim 5, characterized in that: The gearbox housing (1) is provided with a positioning fitting portion (15) corresponding to the positioning lug (21), and the positioning lug (21) is locked and fixed to the corresponding positioning fitting portion (15) by the corresponding fastener (22).

7. The deceleration device for an ice maker according to claim 6, characterized in that: Two positioning lugs (21) are provided, and the two positioning lugs (21) are symmetrically distributed on the side wall of the stator injection molding motor (2).

8. The deceleration device for an ice maker according to claim 6, characterized in that: The gearbox housing (1) is provided with a plurality of positioning columns (121), and the end faces of the plurality of positioning columns (121) and the positioning matching portions (15) are located on the same plane. When the positioning lugs (21) are locked and fixed with the corresponding positioning matching portions (15), the stator injection molding motor (2) and the positioning columns (121) are tightly pressed and positioned.

9. The deceleration device for an ice maker according to claim 5, characterized in that: The power input end includes a helical gear shaft (23) arranged at the output end of the stator injection molding motor (2); the stator injection molding motor (2) is provided with an embedded portion (24) around the helical gear shaft (23); the gear box housing (1) is provided with an embedded matching portion (16) corresponding to the embedded portion (24); the embedded portion (24) is plug-fitted with the embedded matching portion (16).

10. The deceleration device for an ice maker according to claim 1, characterized in that: The gearbox housing (1) is provided with a water collecting groove (18) around the power output end, and the gearbox housing (1) is provided with a water leakage hole (17) corresponding to the water collecting groove (18).

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