Cold drink machine rotating shaft sealing structure

Abstract

The utility model discloses a cold -drinks machine pivot seal structure belongs to cold -drinks machine's pivot seal technology, and the sealing assembly of existing cold -drinks machine evaporimeter realizes assembly through embedding fixed cover of through cover and front end opening, and the assembly reliability and sealability are difficult to guarantee, the utility model discloses a sealing structure including first pressure block, second pressure block and oil seal through the assembly of through -hole, first pressure block is assembled in the through -hole, and second pressure block is assembled in first pressure block, oil seal is restrained between first pressure block and second pressure block, and first pressure block, second pressure block and oil seal have corresponding axle hole, and the pivot is worn in the axle hole and is sealed with oil seal cooperation. First pressure block as the installation basis of sealing structure on evaporimeter casing, need not rely on other components cooperation, and the assembly is reliable, when receiving the greater impact from pivot, can keep good assembly reliability and sealability. Moreover, because first pressure block is assembled in the through -hole, need not cooperate with other components when assembling, increase the convenience of assembly.

Description

Technical Field

[0001] This utility model relates to the shaft sealing technology of cold drink machines, specifically to a shaft sealing structure for cold drink machines. Background Technology

[0002] A beverage cooler is used to make cold drinks such as beverages and slushies. It relies on an evaporator inside the cylinder to cool the cold drinks and on a rotating shaft that drives a scraper to stir and mix them. When ice forms on the outer wall of the evaporator, the scraper is also used to scrape the ice. The rotating shaft runs through the center of the evaporator, so it needs to be reliably sealed to prevent leakage.

[0003] Patent document CN223004418U discloses a sealing assembly for an evaporator. The sealing assembly includes an outer bushing that abuts against a rotating shaft, a through sleeve embedded around the outer bushing, and a fixing sleeve disposed on the inner wall of the evaporator housing. The through sleeve passes through a front opening and is embedded in the fixing sleeve. A first gasket sleeve is also provided between the through sleeve and the evaporator housing. An inner bushing that abuts against the rotating shaft is provided within the inner circumference of the fixing sleeve. The rear end of the inner bushing is embedded in the rear end of the evaporator housing, and the front end of the inner bushing abuts against the fixing sleeve. In this technical solution, the through sleeve passes through the front opening and is embedded in the fixing sleeve, which is equivalent to the through sleeve and the fixing sleeve clamping the front wall of the evaporator housing from both sides to achieve assembly. Axial fixation depends on the tightness of the through sleeve embedded in the fixing sleeve. Since the torque of the rotating shaft varies greatly with operating conditions during operation, the sealing assembly is subjected to significant variations in impact from the rotating shaft, making it difficult to guarantee assembly reliability and sealing performance. Utility Model Content

[0004] This invention addresses the shortcomings of existing cold drink machine evaporator sealing components, which rely on a through sleeve inserted into a fixed sleeve through a front opening for assembly, resulting in unreliable assembly and sealing performance. It provides a cold drink machine shaft sealing structure to maintain good assembly reliability and sealing performance even under significant impacts from the shaft.

[0005] To achieve the above objectives, the present invention provides a rotating shaft sealing structure for a cold drink machine, comprising an evaporator housing and a rotating shaft. The evaporator housing has an end wall with a through hole at its center. A sealing structure comprising a first pressure block, a second pressure block, and an oil seal is assembled at the through hole. The structure is characterized in that: the first pressure block is assembled in the through hole, and the second pressure block is assembled in the first pressure block; the oil seal is constrained between the first and second pressure blocks; the first pressure block, the second pressure block, and the oil seal have corresponding shaft holes; and the rotating shaft passes through the shaft holes and is sealed with the oil seal.

[0006] The rotating shaft sealing structure of this beverage cooler uses the first pressure block as the mounting base for the sealing structure on the evaporator shell. It does not require cooperation with other components, ensuring reliable assembly and maintaining good assembly reliability and sealing performance even under significant impact from the rotating shaft. Furthermore, since the first pressure block is mounted in a through hole, it does not require cooperation with other components during assembly, increasing ease of assembly.

[0007] The sealing structure of the rotating shaft of this cold drink machine acts as a bearing on the end wall of the evaporator shell to support the rotation of the shaft, simplifying the bearing structure of the shaft at this location.

[0008] Preferably, the through hole has a notch, and the first pressure block has a cylindrical portion and an end cap. The cylindrical portion has a radial flange corresponding to the notch, and a gap is maintained between the radial flange and the end cap. The cylindrical portion passes through the through hole, and the radial flange and the end cap are located on opposite sides of the end wall, with the radial flange misaligned with the notch, and the end wall is engaged in the gap. Accordingly, during assembly, the radial flange is aligned with the notch, and then the first pressure block is rotated to achieve assembly, making assembly convenient.

[0009] Preferably, a sealing gasket is placed between the end cap and the end wall, and a sealing sleeve is placed between the end cap and the rotating shaft. This establishes a seal between the first pressure block and the end wall, as well as the rotating shaft, preventing leakage in all directions.

[0010] Preferably, the end cap extends towards the center to form an edge of the hole, and the sealing sleeve has an annular groove that engages with the edge of the hole. The engagement of the annular groove and the edge of the hole forms a labyrinth structure to ensure a sealing effect.

[0011] Preferably, the cylinder has a groove, and the second pressure block has a radial protrusion. The second pressure block is located inside the cylinder, and the radial protrusion is engaged in the groove and axially presses the oil seal. Assembly is convenient and reliable.

[0012] Preferably, the slot includes an axial section and a circumferential section connected together, with the radial protrusion placed in the axial section and engaging with the circumferential section after rotation. This facilitates assembly and promotes axial compression of the oil seal.

[0013] Preferably, a sealing sleeve is placed between the end cap and the rotating shaft, and the oil seal is pressed tightly against the sealing sleeve by the second pressure block. Both the sealing sleeve and the oil seal have excellent elasticity and sealing performance, and the compression of the two together can achieve a better sealing effect.

[0014] Preferably, a sleeve is installed inside the evaporator shell, with one end of the sleeve abutting against the sealing structure. The rotating shaft is located inside the sleeve, and the radially outer side of the evaporator shell and the sleeve is filled with foam material. The foam material is bonded together with the parts that contact the sleeve and the sealing structure. Accordingly, the foam material is used to reinforce and support the sealing structure.

[0015] Preferably, the second pressure block is assembled radially inside the first pressure block, with an annular gap maintained between the second and first pressure blocks, and the sleeve is inserted into the annular gap. This better isolates the foam material from the rotating shaft, preventing the foam from contacting the shaft and hindering its rotation, thus ensuring flexible rotation of the shaft.

[0016] Preferably, the first pressure block is assembled into the through hole from the outside of the end wall, and the second pressure block is assembled into the first pressure block from the inside of the end wall. This allows the portion of the first pressure block on the outside of the end wall to occupy less space, ensuring a regular structure.

[0017] This invention relates to a sealing structure comprising a first pressure block, a second pressure block, and an oil seal, assembled at a through-hole. Specifically, the first pressure block is assembled within the through-hole, and the second pressure block is assembled within the first pressure block. The oil seal is constrained between the first and second pressure blocks. The first pressure block, the second pressure block, and the oil seal each have corresponding shaft holes, through which a rotating shaft passes and seals with the oil seal. The first pressure block serves as the mounting base for the sealing structure on the evaporator shell, eliminating the need for cooperation with other components. This ensures reliable assembly and maintains good assembly reliability and sealing even under significant impact from the rotating shaft. Furthermore, since the first pressure block is assembled within the through-hole, assembly without the need for cooperation with other components increases the ease of assembly. Attached Figure Description

[0018] Figure 1 This is a schematic diagram showing the position of the rotating shaft sealing structure of this utility model on the cold drink machine;

[0019] Figure 2 for Figure 1 Enlarged diagram of part A in the diagram;

[0020] Figure 3 for Figure 2 The diagram shows the shaft sealing structure assembled with the shaft.

[0021] Figure 4 This is a schematic diagram of the second pressing block being assembled onto the first pressing block according to this utility model;

[0022] Figure 5 This is a schematic diagram of the second pressure block being assembled onto the first pressure block according to this utility model;

[0023] Figure 6 This is a schematic diagram of the first pressure block of this utility model being assembled into the through hole of the end wall of the evaporator shell;

[0024] Figure 7 This is a schematic diagram of the through hole in the end wall of the evaporator shell where the first pressure block of this utility model is assembled;

[0025] Figure 8 for Figure 7 A schematic diagram of the structure shown from another perspective;

[0026] Explanation of the labels in the diagram:

[0027] 100 barrel, 101 feed port, 102 outlet;

[0028] 200 Evaporator shell, 201 End wall, 202 Through hole, 203 Notch, 204 Foaming material, 205 Sleeve;

[0029] 300 swivels;

[0030] 400 reamer;

[0031] 500 sealed structure,

[0032] 510 First pressure block, 511 Cylindrical section, 512 End cap, 513 Radial flange, 514 Slit, 515 Hole edge, 516 Slot

[0033] 520 Second pressure block, 521 Radial protrusion,

[0034] 530 oil seal,

[0035] 540 sealing gasket,

[0036] 550 sealing sleeve,

[0037] 560 annular gap. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0039] The terms “comprising” and “having”, and any variations thereof, in the specification and claims of this utility model are intended to cover non-exclusive inclusion, such as a method or product that includes a series of technical features, not limited to those technical features explicitly listed, but also including other technical features that may be included in the method or product but not explicitly listed.

[0040] In the description of this utility model, it should be understood that the technical features defined by terms such as "first" and "second" which have a sequential concept are only for the purpose of clearly describing the defined technical features and making the defined technical features clearly distinguishable from other technical features, and do not represent that they are named in this way in actual implementation. Therefore, they should not be construed as limitations on this utility model.

[0041] The present invention will now be described in detail with reference to specific embodiments and accompanying drawings.

[0042] like Figure 1 The diagram shows the assembly relationship of the beverage cylinder 100, evaporator housing 200, rotating shaft 300, and scraper 400 of the beverage cooler. The beverage cylinder 100 has a feeding port 101 at the upper left and an outlet 102 at the lower right. A valve is installed at the outlet to control the discharge of cold beverages. Beverage ingredients are added through the feeding port, cooled by the evaporator, and stirred by the scraper inside the cylinder. The scraper also scrapes ice from the outer wall of the evaporator. When needed, the valve is controlled to discharge the cold beverage from the outlet. The scraper 400 is driven by the rotating shaft 300, which extends laterally through the evaporator housing. Therefore, a shaft sealing structure is installed where the rotating shaft 300 exits the end wall 201 of the evaporator housing to prevent leakage of cold beverages into the evaporator.

[0043] like Figure 2-3 As shown, the rotating shaft sealing structure of the cold drink machine includes an evaporator housing 200 and a rotating shaft 300. The evaporator housing has an end wall 201, and a through hole 202 is provided at the center of the end wall. A sealing structure 500 including a first pressure block 510, a second pressure block 520, and an oil seal 530 is installed at the through hole 202. The first pressure block 510 is installed in the through hole 202, and the second pressure block 520 is installed in the first pressure block 510. The oil seal 530 is constrained between the first pressure block 510 and the second pressure block 520. The first pressure block, the second pressure block, and the oil seal have corresponding shaft holes. The rotating shaft 300 passes through the shaft hole and is sealed with the oil seal 530.

[0044] Since the first pressure block serves as the mounting base for the sealing structure on the evaporator shell, it does not require cooperation with other components, ensuring reliable assembly and maintaining good assembly reliability and sealing performance even under significant impact from the rotating shaft. Furthermore, because the first pressure block is mounted in a through hole, it does not require cooperation with other components during assembly, increasing ease of assembly. This rotating shaft sealing structure for the beverage cooler acts as a bearing on the end wall of the evaporator shell, supporting the rotation of the rotating shaft and simplifying the bearing structure at this location.

[0045] like Figure 6 As shown, the through hole 202 has three evenly distributed notches 203. (As...) Figure 4-5 As shown, the first pressure block 510 has a cylindrical portion 511 and an end cap 512. The cylindrical portion 511 has three evenly distributed radial flanges 513 with corresponding notches 203, and a gap 514 is maintained between the radial flanges 513 and the end cap 512. Figure 2-3 , Figure 8 As shown, the cylindrical portion 511 passes through the through hole 202, the radial flange 513 and the end cap 512 are located on opposite sides of the end wall 201, and the radial flange 513 is misaligned with the notch 203. The end wall 201 is engaged in the gap 514, thereby maintaining the assembly relationship between the first pressure block and the through hole. Figure 6As shown, during assembly, the radial flange 513 is aligned with the notch 203, and the cylindrical part is inserted into the through hole 202. Then, the first pressure block 510 is rotated to make the radial flange and the notch misaligned, thus achieving assembly. Assembly is convenient.

[0046] like Figure 2-3 As shown, a sealing gasket 540 is placed between the end cap 512 and the end wall 201, and a sealing sleeve 550 is placed between the end cap 512 and the rotating shaft 300. This establishes a seal between the first pressure block and the end wall and the rotating shaft, preventing leakage from all directions. The end cap 512 extends towards the center with a bore edge 515, and the sealing sleeve has an annular groove that engages with the bore edge. The engagement of the annular groove and the bore edge forms a labyrinth structure, ensuring a sealing effect. Furthermore, the oil seal 530 is pressed tightly against the sealing sleeve 550 by the second pressure block 520. Both the sealing sleeve and the oil seal have excellent elasticity and sealing properties; when pressed together, they achieve a better sealing effect.

[0047] like Figure 4-5 As shown, the cylindrical portion 511 has a groove 516, and the second pressing block 520 has a radial protrusion 521. The second pressing block 520 is located inside the cylindrical portion 511, and the radial protrusion 521 is engaged in the groove 516 and axially presses the oil seal. Assembly is convenient and reliable. The groove comprises a connected axial section and a circumferential section, forming a "7" shape. The radial protrusion 521 is placed in the axial section and, after rotation, engages with the circumferential section. Assembly is convenient and facilitates axial pressing of the oil seal.

[0048] like Figure 1 As shown, an evaporator shell 200 contains a sleeve 205, one end of which abuts against a sealing structure 500. A rotating shaft 300 is located inside the sleeve 205. The evaporator shell 200 and the radially outer side of the sleeve 205 are filled with foamed material 204. The foamed material 204 is bonded to the sleeve 205 and the sealing structure 500 at their contact points. This bonding is not only achieved through the adhesive properties of the foamed material, but also because both the radially outer sides of the sleeve 205 and the sealing structure 500 are filled with foamed material. Therefore, the foamed material provides insulation while simultaneously reinforcing and supporting the sealing structure. Specifically, as... Figure 2-3 As shown, the second pressure block 520 is assembled on the radially inner side of the first pressure block 510, and an annular gap 560 is maintained between the second pressure block 520 and the first pressure block 510. The sleeve 205 is inserted into the annular gap 560. This can better isolate the foam material from the rotating shaft, avoid the foam from contacting the rotating shaft and hindering the rotation of the shaft, and ensure that the rotating shaft rotates flexibly.

[0049] In particular, the first pressure block 510 is fitted into the through hole 202 from the outside of the end wall 201, and the second pressure block 520 is fitted into the first pressure block 510 from the inside of the end wall 201. This allows the portion of the first pressure block on the outside of the end wall to occupy less space, ensuring a regular structure.

[0050] The above-mentioned sealing structure can be assembled in the following manner:

[0051] 1. Assemble the sealing sleeve 550 to the edge of the hole in the first pressure block 510, and put the sealing gasket 540 on the cylindrical part 511;

[0052] 2. For example Figure 6 As shown, from the outside of the evaporator housing 200, align the radial flange 513 of the first pressure block 510 with the notch 203 of the through hole 202, place the cylindrical portion 511 of the first pressure block 510 into the through hole 202, and then rotate the first pressure block 510 to misalign the radial flange 513 with the notch 203. Figure 7-8 As shown, the first pressure block 510, sealing gasket 540, and sealing sleeve 550 are assembled into place.

[0053] 3. Place the oil seal 530 inside the cylinder 511 from the inside of the evaporator housing 200;

[0054] 4. The radial protrusion 521 of the second pressure block 520 is clamped into the groove 516 of the cylinder 511 from the inside of the evaporator housing 200, that is, the oil seal is axially pressed.

[0055] 5. Install the matching pipe 205 and fill it with foam material 204 to complete the process. Figure 2 The structure shown;

[0056] 6. Insert the rotating shaft 300 into the sleeve 205 and through the sealing structure 500, then it will extend out of the evaporator outer shell 200 and connect to the reamer 400, achieving... Figure 3 The structure shown.

Claims

1. A rotating shaft sealing structure for a cold drink machine, comprising an evaporator housing (200) and a rotating shaft (300), wherein the evaporator housing has an end wall (201), a through hole (202) is provided at the center of the end wall, and a sealing structure (500) comprising a first pressure block (510), a second pressure block (520) and an oil seal (530) is assembled at the through hole, characterized in that: The first pressure block (510) is assembled in the through hole (202), and the second pressure block (520) is assembled in the first pressure block (510); the oil seal (530) is constrained between the first pressure block (510) and the second pressure block (520). The first pressure block (510), the second pressure block (520) and the oil seal (530) have corresponding shaft holes, and the rotating shaft (300) passes through the shaft hole and seals with the oil seal (530).

2. The sealing structure for the rotating shaft of a cold drink machine according to claim 1, characterized in that: The through hole (202) has a notch (203), and the first pressure block (510) has a cylindrical part (511) and an end cap (512). The cylindrical part (511) has a radial flange (513) corresponding to the notch (203). A gap (514) is maintained between the radial flange (513) and the end cap (512). The cylindrical part (511) passes through the through hole (202). The radial flange (513) and the end cap (512) are located on opposite sides of the end wall (201), and the radial flange (513) is misaligned with the notch (203). The end wall (201) is stuck in the gap (514).

3. The sealing structure for the rotating shaft of a cold drink machine according to claim 2, characterized in that: A sealing gasket (540) is placed between the end cap (512) and the end wall (201), and a sealing sleeve (550) is placed between the end cap (512) and the rotating shaft (300).

4. The sealing structure for the rotating shaft of a cold drink machine according to claim 3, characterized in that: The end cap (512) extends towards the center to form a hole edge (515), and the sealing sleeve (550) is provided with an annular groove, which is engaged with the hole edge (515).

5. The sealing structure for the rotating shaft of a cold drink machine according to claim 2, characterized in that: The cylindrical part (511) has a groove (516), and the second pressure block (520) has a radial protrusion (521). The second pressure block (520) is located inside the cylindrical part (511), and the radial protrusion (521) is fitted into the groove (516) and axially presses the oil seal (530).

6. The sealing structure for the rotating shaft of a cold drink machine according to claim 5, characterized in that: The slot includes a connected axial section and a circumferential section. The radial protrusion is placed in the axial section and, after rotation, engages with the circumferential section.

7. The sealing structure for the rotating shaft of a cold drink machine according to claim 5, characterized in that: A sealing sleeve (550) is placed between the end cap (512) and the rotating shaft (300), and the oil seal (530) is pressed against the sealing sleeve (550) by the second pressure block (520).

8. The sealing structure of the rotating shaft of the cold drink machine according to claim 1, characterized in that: evaporator A sleeve (205) is provided inside the shell (200). One end of the sleeve (205) abuts against the sealing structure (500). The rotating shaft (300) is located inside the sleeve (205). The evaporator shell (200) and the radial outer side of the sleeve (205) are filled with foam material (204). The foam material (204) is combined with the parts that contact the sleeve and the sealing structure.

9. The sealing structure for the rotating shaft of a cold drink machine according to claim 8, characterized in that: The second pressure block (520) is assembled on the radial inner side of the first pressure block (510), and an annular gap (560) is maintained between the second pressure block and the first pressure block. The sleeve (205) is inserted into the annular gap (560).

10. The sealing structure for the rotating shaft of a cold drink machine according to any one of claims 1-9, characterized in that: The first pressure block (510) is assembled into the through hole (202) from the outside of the end wall (201), and the second pressure block (520) is assembled into the first pressure block (510) from the inside of the end wall (201).

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