Dynamic sealing structure capable of being selectively assembled and engineering machinery assembly using dynamic sealing structure

Abstract

The dynamic sealing structure provided by the utility model can be selectively assembled. The dynamic sealing structure comprises a first part and a second part which can rotate around an axis relative to each other; the adjusting structure is configured to be used for forming a dynamic seal between the first component and the second component, and the axial size of the formed sealing gap can be changed by changing the circumferential orientation of the adjusting structure around the axis. The dynamic sealing structure capable of being selectively assembled is easy to assemble and maintain, the service life of a sealing assembly forming dynamic sealing can be prolonged, and the material cost and the labor cost for replacing a new sealing assembly are saved; and equipment using the dynamic sealing structure can be helped to run under different working conditions under proper sealing conditions. The utility model further provides an engineering machinery assembly using the dynamic sealing structure.

Description

Technical Field

[0001] The utility model relates to a dynamic sealing structure, in particular to a dynamic sealing structure with certain selectivity for installation orientation during assembly. In addition, the utility model also relates to an engineering machinery component using the dynamic sealing structure. Background Art

[0002] In the field of transmissions, a mechanical end-face seal in the form of a dynamic seal is typically used between a bearing seat (or ring gear) and an output shaft (or spindle) that can rotate relative to each other to ensure a seal between them. In nearly all existing transmission designs, the mating structure of the ring gear and spindle results in a fixed sealing gap between them after assembly. Furthermore, given the varying application scenarios of the equipment in which these dynamic seals are used (e.g., varying temperatures, high torque / low speed or low torque / high speed, and varying classifications or proportions of these operating conditions), the resulting sealing gap cannot be selectively adjusted for specific applications. In this scenario, the sealing component (e.g., an oil seal) used to form this dynamic seal is likely to withstand axial pressures exceeding the required pressure during actual use, unnecessarily shortening the service life of the sealing component. Clearly, after the ring gear and spindle are selected, making the sealing gap between them adjustable would be more beneficial for extending the service life of the sealing component.

[0003] Furthermore, existing transmission designs often require monitoring the operating temperature of the seal assembly to prevent premature failure due to excessive temperatures. Therefore, existing monitoring measures typically measure the lubricating oil temperature to indirectly determine the actual temperature of the seal assembly (or the ambient temperature). However, different transmissions typically experience a variety of operating conditions, torque / speed ratios, and varying ambient temperatures in different operating regions. Therefore, it is clear that the lubricating oil temperature can differ significantly from the temperature of the seal assembly (e.g., the corresponding steel ring or rubber ring used in the oil seal). Therefore, existing methods of monitoring the operating temperature of the seal assembly by measuring the lubricating oil temperature are inaccurate. Compared to low-speed operating conditions, seal assemblies operating under high-speed conditions generate more heat and a greater temperature rise, leading to premature wear of the steel ring sealing surface and shortening its service life. This difference can be reduced by adjusting the size of the sealing gap within the seal assembly. Therefore, more accurate measurement of the actual operating temperature of the seal assembly used to form a dynamic seal is more beneficial.

[0004] To this end, the industry needs a dynamic sealing structure that can be selectively assembled, which is easy to assemble and maintain, helps to extend the service life of the sealing components that form the dynamic seal, saves the material cost and labor cost of replacing new sealing components, avoids the loss of production capacity due to downtime for maintenance, and can help the equipment using the dynamic sealing structure operate in appropriate sealing conditions under different working conditions. Utility Model Content

[0005] In order to achieve at least one of the above-mentioned purposes, the present invention provides a dynamic sealing structure capable of selective assembly. The dynamic sealing structure includes: a first component, the first component having a first axial side; a second component, the second component having a second axial side and configured to be coaxially mounted with the first component along an axis, such that the second axial side is arranged opposite to the first axial side, and the first component and the second component are configured to be rotatable relative to each other around the axis; and an adjustment structure, the adjustment structure being configured to form a dynamic seal between the first component and the second component, and capable of changing the axial size of the formed sealing gap by changing the circumferential orientation of the adjustment structure around the axis.

[0006] According to one embodiment of the dynamic sealing structure of the present invention, the adjustment structure includes: an adjustment surface, which is configured to abut against a joint surface provided in one of the first component and the second component, and is provided with at least two segments arranged along the circumferential direction around the axis, and one of the at least two segments protrudes along the axis relative to the other and has a non-zero axial adjustment dimension; and the joint surface, which is configured to have a joint segment and a reference segment arranged around the axis, and the joint segment protrudes along the axis relative to the reference segment with a non-zero axial joint dimension, and the axial joint dimension is configured to be larger than the axial adjustment dimension, and the circumferential dimension of the joint segment is smaller than the circumferential dimension of any one of the at least two segments.

[0007] Further, each of the at least two sections, the joining section and the reference section includes two subsections arranged in a symmetrical or asymmetrical manner along the diameter direction.

[0008] Furthermore, the at least two segments include a first segment, a second segment, and a third segment, and the second segment protrudes a first axial adjustment dimension relative to the first segment along the axis, the third segment protrudes a second axial adjustment dimension relative to the first segment along the axis, and the second axial adjustment dimension is larger than the first axial adjustment dimension; and the axial engagement dimension is configured to be larger than the second axial adjustment dimension.

[0009] According to another embodiment of the dynamic sealing structure of the present invention, the adjustment structure includes an adjustment ring, which is coaxially arranged between the first component and the second component and radially and / or axially positioned by the first component, and the adjustment ring is provided with: a first side arranged perpendicular to the axis, the first side is configured to abut with the first axial side, wherein the first side is provided with the adjustment surface, and the first axial side is provided with the engagement surface for engaging with the adjustment surface; and a second side axially opposite to the first side, the second side is arranged to form the sealing gap between the second axial side.

[0010] According to another embodiment of the dynamic sealing structure of the present invention, the adjustment structure includes an adjustment ring, which is arranged between the first component and the second component and is provided with: a first side, the first side is configured to be provided with: a circumferential groove, the circumferential groove is configured to be recessed relative to the first side along the axis for receiving the first axial side, the bottom surface of the circumferential groove is configured as the adjustment surface, and the first axial side is provided with the engagement surface for engaging with the adjustment surface; and a flange located radially outside the circumferential groove, a connecting member extends along the axis through the flange to detachably connect the adjustment ring to the first component; and a second side axially opposite to the first side, the second side being configured to form the sealing gap between the second axial side.

[0011] According to another embodiment of the dynamic sealing structure of the present invention, the adjustment structure includes an adjustment ring, which is configured to abut on a third axial side of the second component opposite to the second axial side and is provided with: a first side, the first side is configured to face the first component and is provided with: an outer circumferential groove, the outer circumferential groove is configured to receive an oil seal that performs a sealing function between the first component and the second component, and the sealing gap is formed between the outer circumferential wall located radially outside the outer circumferential groove and the first component; and an inner circumferential groove, the bottom surface of the inner circumferential groove is configured to serve as the adjustment surface, and the third axial side is provided with the engagement surface for engaging with the adjustment surface provided on the third axial side.

[0012] Furthermore, the adjustment ring is also provided with a second side opposite to the first side, and a second inner circumferential groove recessed along the axis is provided on the second side, and the second inner circumferential groove is configured to accommodate an additional adjustment component to change the circumferential orientation of the adjustment ring around the axis; and the dynamic sealing structure also includes a clamping ring, which is fixed relative to the second component so as to cooperate with the adjustment ring to axially position the additional adjustment component.

[0013] Furthermore, the additional adjustment assembly includes: a reference member, the reference member being configured to have: a first side, the first side of the reference member being provided with a receiving groove for receiving one end of the elastic member; and a second side opposite to the first side of the reference member, the second side of the reference member being configured to axially abut against the clamping ring; a threaded hole, the threaded hole extending along the axis, being located radially outside the receiving groove, and being capable of being threadedly engaged with a fastener; and a piston member, the piston member being configured to have: a through hole, the through hole being configured to allow a portion of the elastic member to be screwed through, but being able to maintain the relative position of the piston member and the elastic member after the connection is completed; a matching threaded hole, the matching threaded hole being configured to receive the fastener passing through the threaded hole of the reference member, so that the axial distance between the piston member and the reference member can be changed by screwing the fastener, wherein a receiving groove for receiving the other end of the elastic member is also provided on the second side of the adjustment ring.

[0014] Furthermore, the axial movement stroke of the piston is greater than the axial adjustment dimension.

[0015] According to another embodiment of the dynamic sealing structure of the present invention, the adjustment structure includes an adjustment ring, which is configured between the first component and the second component and is provided with: a first side, the first side is configured to face the first component and is provided with an outer circumferential groove, the outer circumferential groove is configured to be recessed relative to the first side along the axis for receiving an oil seal that performs a sealing function between the first component and the second component, and the sealing gap is formed between the outer circumferential wall located radially outside the outer circumferential groove and the first component; and a second side opposite to the first side along the axis, the second side is provided with an inner circumferential groove, the inner circumferential groove is configured to be recessed relative to the second side along the axis, the bottom surface of the inner circumferential groove is configured to serve as the adjustment surface, and the second axial side is provided with the engagement surface for engaging with the adjustment surface.

[0016] According to another embodiment of the dynamic sealing structure of the present invention, the adjustment structure includes an adjustment washer, which is arranged between the first component and the second component and is located radially inside the oil seal steel ring also arranged between the first component and the second component and is provided with the adjustment surface on the side facing the second component, and a joining surface for joining with the adjustment surface is provided on the second axial side.

[0017] According to another embodiment of the dynamic sealing structure of the present invention, one of the first component and the second component is a fixed component fixed relative to the axis, and the other of the first component and the second component is a rotating component capable of rotating around the axis relative to the fixed component.

[0018] Further, the dynamic sealing structure is provided with a temperature sensing device, which is configured to directly sense the temperature of the dynamic sealing structure via a sensing line disposed through a channel of one of the first component and the second component.

[0019] Furthermore, one end of the sensing line away from the temperature sensing device (T) is arranged to contact an oil seal steel ring provided near one of the first component and the second component.

[0020] The utility model also provides an engineering machinery component, which is configured to use any one of the aforementioned dynamic sealing structures.

[0021] The selectively assembled dynamic sealing structure provided by the utility model is easy to assemble and maintain, helps to extend the service life of the sealing component that forms the dynamic seal, saves the material cost and labor cost of replacing a new sealing component, and can help the equipment using the dynamic sealing structure operate in an appropriate sealing condition under different working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In this document, the same or similar reference numerals are used to refer to the same or similar components. The accompanying drawings are only used to illustrate relevant examples of the composition of the dynamic sealing structure of the present invention, but are not intended to limit it. In the accompanying drawings:

[0023] Figure 1 FIG. 1 is a schematic diagram briefly showing a dynamic sealing structure according to the prior art.

[0024] Figure 2 It is a cross-sectional view of an embodiment of a dynamic sealing structure according to the present utility model.

[0025] Figure 2A yes Figure 2 A partial enlarged view of the dynamic sealing structure shown in .

[0026] Figure 2B yes Figure 2 The exploded cross-sectional view of the dynamic sealing structure is shown to clearly illustrate the position of the adjustment surface of the dynamic sealing structure.

[0027] Figure 2C and Figure 2D They are respectively composed Figure 2The three-dimensional view of the two parts of the dynamic sealing structure shown in the figure is used to more clearly reflect the specific situation of the adjustment surface.

[0028] Figure 3 It is a cross-sectional view of another embodiment of the dynamic sealing structure according to the present utility model.

[0029] Figure 3A yes Figure 3 A partial enlarged view of the dynamic sealing structure is shown.

[0030] Figure 3B yes Figure 3 The exploded cross-sectional view of the dynamic sealing structure is shown to clearly illustrate the position of the adjustment surface of the dynamic sealing structure.

[0031] Figure 3C and Figure 3D It is composed Figure 3 A perspective view of the two parts of the dynamic sealing structure shown in FIG.

[0032] Figure 3E yes Figure 3D A schematic partial cross-sectional view of the components shown.

[0033] Figure 4 It is a cross-sectional view of yet another embodiment of the dynamic sealing structure according to the present utility model.

[0034] Figure 4A yes Figure 4 A partial enlarged view of the dynamic sealing structure is shown.

[0035] Figure 4B yes Figure 4 The exploded cross-sectional view of the dynamic sealing structure is shown to clearly illustrate the position of the adjustment surface of the dynamic sealing structure.

[0036] Figure 4C and Figure 4D It is composed Figure 4 A perspective view of the two parts of the dynamic sealing structure shown in FIG.

[0037] Figure 5 It is a cross-sectional view of another embodiment of the dynamic sealing structure according to the present invention.

[0038] Figure 5A yes Figure 5 A partial enlarged view of the dynamic sealing structure is shown.

[0039] Figure 5B yes Figure 5 The exploded cross-sectional view of the dynamic sealing structure is shown to clearly illustrate the position of the adjustment surface of the dynamic sealing structure.

[0040] Figure 5C and Figure 5D It is composed Figure 5 A perspective view of the two parts of the dynamic sealing structure shown in FIG.

[0041] Figure 6 It is used Figure 5 A cross-sectional view of an improved embodiment of a dynamic sealing structure is shown in FIG.

[0042] Figure 6A yes Figure 6 A partial enlarged view of the dynamic sealing structure is shown.

[0043] Figure 6B yes Figure 6 An exploded cross-sectional view of the structure shown to clearly illustrate the composition of the additional adjustment components used.

[0044] Figure 7 It is a cross-sectional view of another embodiment of the dynamic sealing structure according to the present utility model.

[0045] Figure 7A yes Figure 7 A partial enlarged view of the dynamic sealing structure is shown.

[0046] Figure 7B yes Figure 7 A cross-sectional view of an adjustment ring used in a dynamic sealing structure shown in FIG.

[0047] Figure 8 It is a cross-sectional view of yet another embodiment of the dynamic sealing structure according to the present utility model.

[0048] Figure 8A yes Figure 8 A partial enlarged view of the dynamic sealing structure is shown.

[0049] Figure 8B and Figure 8C They are respectively composed Figure 8 Exploded perspective views of components of the dynamic sealing structure shown from different perspectives. DETAILED DESCRIPTION

[0050] The following describes the selectively assembled dynamic sealing structure of the present invention with reference to the accompanying drawings. It should be noted that for the sake of brevity and clarity in the description and interpretation herein, components or structures not involved in the improvements of the present invention (e.g., oil seals, oil seal steel rings, etc.) will not be described in detail below. The specifics of these components or structures are commonly used or familiar in the art.

[0051] Figure 1 A schematic diagram of a dynamic sealing structure according to the prior art is briefly shown. Figure 1In the structure shown, the transmission assembly 10 mainly includes a first component and a second component that can rotate relative to each other. As shown in the figure, the first component is shown as a bearing seat or a ring gear 11, and the second component is shown as a spindle 12 that can rotate relative to the first component around an axis (not shown in the figure). The ring gear 11 is sleeved on the outer periphery of the spindle 12, and a sealing structure is provided between the two. As shown, the sealing structure is shown as a pair of oil seals and corresponding oil seal steel rings. Alternatively, it can be imagined by those skilled in the art that the spindle 12 can also be set to be fixed relative to the axis, and the ring gear 11 can be set to be able to rotate relative to the spindle 12 around the axis.

[0052] exist Figure 1 In the dynamic sealing structure shown, the gear ring 11 and the spindle 12 both act as oil seal rings to radially and / or axially position a corresponding one of a pair of oil seals, and thereby form a sealing gap G0 of interest between the gear ring 11 and the spindle 12. Figure 1 In the transmission assembly 10 shown in FIG, the size of the sealing gap G0 is fixed, i.e., it is not adjustable. In other words, the size of the sealing gap G0 is pre-designed by the manufacturer before shipment. In actual operation, once the transmission assembly (i.e., the ring gear and spindle) is determined, technicians are unable to select and adjust the size of the sealing gap based on actual application requirements (e.g., operating ambient temperature, etc.). This obviously has certain limitations and inevitably reduces user flexibility and application satisfaction.

[0053] Figure 2 It is a cross-sectional view of an embodiment of a dynamic sealing structure according to the present utility model. Figure 2A and Figure 2B They are Figure 2 The partial enlarged view and exploded cross-sectional view of the dynamic sealing structure are shown to clearly illustrate the position of the adjustment surface of the dynamic sealing structure according to the present utility model. Figure 2C and Figure 2D They are respectively composed Figure 2 The three-dimensional view of the two parts of the dynamic sealing structure shown in the figure is used to more clearly reflect the specific situation of the adjustment surface.

[0054] Refer to the following Figure 2-2D Provide explanation.

[0055] like Figure 2 As shown in FIG, the transmission assembly 20 includes a coaxially arranged ring gear 21 and a spindle 22. The ring gear 21 is sleeved on the spindle 22 along the axis LL. The spindle 22 is cylindrical and fixed relative to the axis LL, so that the ring gear 21 can rotate relative to the spindle 22 around the axis LL. Figure 2AThe details of the dynamic sealing structure between the ring gear 21 and the spindle 22 are shown. Figure 1 The dynamic sealing structure of the prior art is similar to that shown in FIG. Figure 2A In the structure shown, a pair of oil seals ( Figure 2A The oil seal a) and the corresponding oil seal steel ring located on the side of the ring gear 21 are shown, and the spindle 22 itself functions as an oil seal ring. However, an adjustment ring 23 is separately provided at the oil seal a of the pair of oil seals. This adjustment ring 23 is configured to function as an oil seal ring to facilitate radial and / or axial positioning of the oil seal a. The side of the adjustment ring 23 facing the spindle 22 forms a sealing gap G with the spindle 22, forming a dynamic sealing structure. The radial positioning of the adjustment ring 23 is achieved by the ring gear 21. That is, a portion of the ring gear 21 surrounds the entire radial outer circumference of the adjustment ring 23 to achieve radial positioning of the adjustment ring 23. In addition, the side of the adjustment ring 23 facing away from the spindle 22 is provided with an adjustment surface that abuts the mating surface of the ring gear 21, thereby utilizing the ring gear 21 and the oil seal a (and its corresponding oil seal steel ring) to achieve axial positioning of the adjustment ring 23.

[0056] Figure 2B The exploded diagram clearly shows Figure 2A The matching situation between the gear ring 21 and the adjustment ring 23 (ie, the specific matching situation between the joint surface and the adjustment surface). Figure 2C and Figure 2D They are shown respectively Figure 2B Detailed view of the engagement surface of the gear ring 21 and the adjustment surface of the adjustment ring 23.

[0057] See also Figure 2B and Figure 2C , the gear ring 21 is provided with a joint surface 210 for abutting against the adjustment surface of the adjustment ring 23. The joint surface 210 is in the form of a stepped surface and is annular in projection along the axis LL, and is provided with two sections along the circumferential direction around the axis LL, namely, a joint section 21S1 and a reference section 21S2. Among them, the joint section 21S1 protrudes an axial joint dimension LJ relative to the reference section 21S2 along the direction of the axis LL (towards the direction of the core shaft 22 to be joined). Preferably, the joint section 21S1 and the reference section 21S2 each include two sub-sections symmetrically arranged along the diameter direction. Due to the viewing angle, Figure 2C Only one complete sub-segment of the reference segment 21S2 is shown.

[0058] See also Figure 2DThe adjustment ring 23 is provided with an adjustment surface 230 for abutting the engagement surface 210 of the ring gear 21. Similar to the engagement surface 210, the adjustment surface 230 is also stepped, having three sections along the circumference around the axis LL: a first section 23S1, a second section 23S2, and a third section 23S3. The second section 23S2 protrudes relative to the first section 23S1 along the axis LL by a first axial adjustment dimension L1, and the third section 23S3 protrudes relative to the first section 23S1 along the axis LL by a second axial adjustment dimension L2, with the second axial adjustment dimension L2 being greater than the first axial adjustment dimension L1. Preferably, each of the first section 23S1, the second section 23S2, and the third section 23S3 is configured to include two diametrically symmetrical subsections to ensure more ideal axial force conditions when engaging with each section of the engagement surface 210 of the ring gear 21.

[0059] although Figure 2D In the embodiment, the adjustment surface 230 is divided into three equally divided sections along the circumferential direction, but this is only exemplary, and it can also be divided into other number of sections, such as two or four, and / or the circumferential size of each section is different. In addition, although Figure 2C and Figure 2D In the figure, the engagement section 21S1 of the engagement surface 210 and each section of the adjustment surface 230 are shown as including two identical sub-sections symmetrical along the diameter direction, but the present invention is not limited to this. Those skilled in the art can fully imagine that the circumferential dimensions of the two sub-sections are set to be different. However, the design schemes of the above-mentioned different embodiments all need to ensure that the circumferential dimension of the engagement section 21S1 of the ring gear 21 (in the case of including two sub-sections, each sub-section) should be smaller than the circumferential dimension of the smallest section among the several sections of the adjustment surface 230, and the axial engagement dimension LJ of the engagement section 21S1 should be larger than the largest of the axial adjustment dimensions of each section of the adjustment surface 230 relative to the first section (such as the second axial adjustment dimension L2 in the above example) to ensure that the engagement section 21S1 can be axially engaged with the smallest section in the adjustment surface (i.e., surface engagement).

[0060] In addition, despite Figure 2D The first segment 23S1 is shown as being circumferentially located between the second segment 23S2 and the third segment 23S3, but this is not a requirement. Other arrangements are also conceivable, such as circumferentially arranging the second segment 23S2 between the first segment 23S1 and the third segment 23S3. The present invention does not impose any further restrictions on this.

[0061] The advantage of utilizing this arrangement is that, in actual application, a skilled worker can selectively cause the engagement section 21S1 (e.g., its two subsections, respectively) of the engagement surface 210 of the ring gear 21 to abut against a selected one (e.g., two subsections) of the several sections of the adjustment surface 230 of the adjustment ring 23. Thus, by selecting different sections of the abutting adjustment surface 230, the axial dimension of the sealing gap G formed between the adjustment ring 23 and the spindle 22 can be changed, ultimately enabling the same transmission assembly (with the ring gear and spindle selected) to operate under different operating conditions with different sealing conditions (i.e., different sealing gaps). This greatly improves the flexibility of the transmission assembly, reduces unnecessary wear and tear on the sealing assembly used in the dynamic sealing structure, and thus helps to extend the service life of the sealing assembly.

[0062] Figure 3 It is a cross-sectional view of another embodiment of the dynamic sealing structure according to the present utility model. Figure 3A and Figure 3B They are Figure 3 The partial enlarged view and exploded cross-sectional view of the dynamic sealing structure are shown to clearly illustrate the position of the adjustment surface of the dynamic sealing structure. Figure 3C and Figure 3D They are respectively composed Figure 3 A three-dimensional view of the two parts of the dynamic sealing structure is shown in the figure to more clearly illustrate the specific situation of the adjustment surface. Figure 3E yes Figure 3D A partial cross-sectional view of the component shown in FIG. 1 is provided to more clearly illustrate the specific structure of its radially outer circumferential portion.

[0063] Refer to the following Figure 3-3D Provide explanation.

[0064] like Figure 3 As shown in FIG, the transmission assembly 30 includes a coaxially arranged ring gear 31 and a spindle 32. The structure and matching of the transmission assembly 30 of this embodiment are similar to those of the embodiment of the present invention. Figure 2-2D The structure and fit of the transmission assembly 20 are similar, the main difference is the use of the adjustment ring 33. Figure 2-2D The positioning of the adjusting ring 23 relative to the gear ring 21 is different in that Figure 3-3D In the illustrated embodiment, the adjustment ring 33 is connected to the ring gear 31 in a threaded manner.

[0065] Figure 3B The specific positions of the engaging surface 310 of the gear ring 31 and the adjusting surface 330 of the adjusting ring 33 are shown. Figure 3C The specific structure of the joint surface 310 of the gear ring 31 is shown. Figure 2B and Figure 2CThe structure of the joint surface 210 shown in FIG is similar, except that the ring gear 31 is provided with a threaded blind hole 311 extending along the axis LL on the radial outside of the joint surface 310 (shown in FIG Figure 3B ), for use with threaded fastener 34 (marked on Figure 3A (middle) threaded connection.

[0066] For the structure of the adjustment ring 33, see Figure 3A 、 Figure 3D and Figure 3E Unlike the aforementioned adjustment ring 23, the adjustment ring 33 of this embodiment is provided with a circumferential groove 330 recessed along the axis LL direction on the side facing the ring gear 31, for receiving a portion of the ring gear 31, so that the bottom surface 330S of the circumferential groove 330 can abut against the engagement surface 310 of the ring gear 31. The bottom surface 330S of the circumferential groove 330 is configured to function as an adjustment surface, and the structure of the bottom surface 330S is similar to that of the ring gear 31. Figure 2D The adjusting surface 230 shown in FIG. Therefore, it will not be described in detail here. The adjusting ring 33 is provided with a plurality of through holes 331 extending along the axis LL at the radial outer side of the circumferential groove 330. The through holes 331 are configured to allow the threaded fasteners 34 to pass through and then be threadedly connected with the threaded blind holes 311 of the ring gear 31, thereby fixing the adjusting ring 33 relative to the ring gear 31. Figure 3A and Figure 3E As shown in , the advantage of setting the through hole 331 on the radial outside of the adjustment surface is that after assembly, the threaded connection via the through hole 331 can prevent the circumferential groove 330 (especially the adjustment surface 330S) from communicating with the external environment, thereby achieving effects such as dust prevention.

[0067] and Figure 2 Unlike the dynamic seal structure shown in the figure, which cannot be adjusted after selective assembly, Figure 3 The illustrated dynamic seal structure can be selectively reassembled after assembly. Specifically, as needed, the threaded fasteners 34 can be removed, thereby releasing the fixing of the adjustment ring 33 relative to the ring gear 31. The adjustment ring 33 can be moved a certain axial distance away from the ring gear 31 and rotated about the axis LL, changing the circumferential orientation of the adjustment ring 33. This, in turn, changes the engagement position between the engagement section of the engagement surface 310 of the ring gear 31 and the adjustment ring 33, allowing the adjustment ring 33 to reengage with a second selected section of the adjustment surface of the adjustment ring 33 (i.e., the bottom surface 330S of the circumferential groove 330), thereby changing the distance of the sealing gap G formed between the adjustment ring 33 and the spindle 32.

[0068] Figure 4 It is a cross-sectional view of yet another embodiment of the dynamic sealing structure according to the present utility model. Figure 4A and Figure 4B They are Figure 4 The partial enlarged view and exploded cross-sectional view of the dynamic sealing structure are shown to clearly illustrate the position of the adjustment surface of the dynamic sealing structure. Figure 4C and Figure 4D They are Figure 4B The two parts shown are three-dimensional views seen from different perspectives to more clearly illustrate the specific situation of the adjustment surface.

[0069] and Figure 2-2D The embodiment shown differs in that Figure 4-4D In the embodiment shown, the transmission assembly 40 is provided with two oil seal rings. Figure 2-2D In the embodiment, the separately provided adjustment ring 23 is configured to play the role of the oil seal ring for the oil seal a (as described above), and the other oil seal in the same pair of oil seals does not have a separate oil seal ring, but relies on the spindle 22 to achieve its radial and / or axial positioning. Figure 4-4D In the structure shown, two oil seals a and b in a pair of oil seals provided between the gear ring 41 and the spindle 42 of the transmission assembly 40 are provided with corresponding oil seal rings 43 and 44, respectively. Alternatively, at least one of the oil seal rings 43 and 44 can be configured as an adjustment ring used in the dynamic adjustment structure according to the present invention. In the case where the oil seal ring 43 is configured as an adjustment ring, the structures of the oil seal ring 43 and the gear ring 41 are respectively similar to those of the embodiment of the present invention. Figure 2-2D The structures of the adjustment ring 23 and the gear ring 21 shown in FIG are the same, so they are not described again here. Figure 4B-4D The case where the oil seal ring 44 is used as the adjustment ring is shown. Figure 4C The specific structure of the adjustment surface 440 of the oil seal ring 44 is shown. Figure 2D The adjustment surface 230 of the adjustment ring 23 shown in FIG. 1 is similar in structure. Figure 4D The spindle 42 is shown to be engaged with the oil seal ring 44, and the structure of the engagement surface 420 thereof is similar to that of Figure 2B and Figure 2C Therefore, it will not be described in detail herein.

[0070] Figure 5 It is a cross-sectional view of another embodiment of the dynamic sealing structure according to the present invention. Figure 5A and Figure 5B They are Figure 5 The partial enlarged view and exploded cross-sectional view of the dynamic sealing structure are shown to clearly illustrate the position of the adjustment surface of the dynamic sealing structure according to the present utility model. Figure 5C and Figure 5D It is composed Figure 5 A perspective view of the two parts of the dynamic sealing structure shown in FIG.

[0071] like Figure 5-5DAs shown in , the transmission assembly 50 includes a ring gear 51 and a spindle 52 that can rotate relative to each other, wherein the ring gear 51 is fixed relative to the axis LL and is sleeved on the radial outer side of the spindle 52, so that the spindle 52 can rotate relative to the ring gear 51 around the axis LL. The spindle 52 is provided with a flange 520 extending radially outward from the outer (circumferential) surface of the spindle 52 around the axis LL. The flange 520 is provided with a first side 521 facing the ring gear 51, a second side 522 facing away from the ring gear 51, and an outer peripheral side 523. Figure 2-2D Compared to the structure shown, Figure 5-5D The biggest difference between the structures shown in FIG and FIG is that the structure of the adjustment ring 53 included in the transmission assembly 50 is different.

[0072] See also Figure 5A and Figure 5B The adjustment ring 53 is provided with an inner circumferential groove 530 and an outer circumferential groove 531 on the side facing the gear ring 51. The inner circumferential groove 530 is recessed along the axis LL and is coaxially arranged around the axis LL. The axial bottom surface 530S of the inner circumferential groove 530 is configured to serve as an adjustment surface (for detailed structure, see Figure 5C ), for abutting against the second side 522 of the flange 520 of the spindle 52, and the circumferential side 530R of the inner circumferential groove 530 is configured to abut against the outer circumferential side 523 of the spindle 52. Similarly, the second side 522 of the flange 520 of the spindle 52 plays the role of a joint surface. For specific structure, see Figure 5D For the specific structure / setting of the adjustment surface and the joint surface, please refer to the above combined Figure 2C The joint surface 210 shown in FIG. Figure 2D The detailed description of the adjustment surface 230 shown in FIG is omitted here.

[0073] The outer circumferential groove 531 is configured to receive one of a pair of oil seals b provided in the transmission assembly 50 (see Figure 5A ) to position it axially and radially. The positioning of the other oil seal a in the pair of oil seals is taken care of by the gear ring 51. In addition, it is also conceivable that a through hole 53H extending along the axis LL is provided on the adjustment ring 53 (see Figure 5C ), and a threaded blind hole 52H extending along the axis LL is provided on the flange 520 of the spindle 52 (see Figure 5D ), and then the adjusting ring 53 is fixed to the spindle 52 by a threaded fastener (not shown) that penetrates the through hole 53H and is threadedly connected to the threaded blind hole 52H, thereby achieving the axial positioning of the adjusting ring 53. After the assembly is completed, the sealing gap G of interest is formed between the outer radial wall 531R of the outer circumferential groove 531 of the adjusting ring 53 and the gear ring 51, as shown in FIG. Figure 5A As shown in .

[0074] As known to those skilled in the art, Figure 5-5D The dynamic seal structure shown is capable of secondary selective assembly after assembly is complete. Specifically, a skilled worker can remove the threaded fasteners to disengage the adjustment ring 53 from the flange 520, and rotate the adjustment ring 53 about the axis LL to change the circumferential orientation of the adjustment ring 53. This allows the worker to select which section of the adjustment surface (i.e., the selected section) engages with the engagement section of the engagement surface, thereby changing the axial dimension of the resulting sealing gap G.

[0075] Figure 6 It is used Figure 5 A cross-sectional view of an improved embodiment of a dynamic sealing structure is shown in FIG. Figure 6A and Figure 6B They are Figure 6 The partial enlarged view and exploded cross-sectional view of the dynamic sealing structure are shown to clearly illustrate the composition of the additional adjustment components used.

[0076] exist Figure 6-6B In the dynamic sealing structure shown in FIG, the adjustment ring 63 in the transmission assembly 60 is connected to the Figure 5 The difference between the adjusting ring 53 in the transmission assembly 50 shown in FIG is that the adjusting ring 63 is further provided with a second inner circumferential groove 632 (marked at Figure 6B ), the second inner circumferential groove 632 is configured to receive the additional adjustment component 64 (marked at Figure 6A The outer circumferential surface of the spindle 62 in the transmission assembly 60 is provided with a receiving groove 621 (marked at Figure 6B The receiving groove 621 is configured to receive the collar SP. The collar SP is, for example, a component that is rigid along the axis LL but has a certain degree of expandability in the radial direction (for example, DIN 471), thereby allowing the collar SP to be snapped into the receiving groove 621 of the spindle 62 after the additional adjustment assembly 64 is installed (see Figure 6A ), thereby achieving axial positioning of the additional adjustment assembly 64 (ie limiting its movement along the axis LL away from the adjustment ring 63).

[0077] See also Figure 6A and Figure 6BThe additional adjustment assembly 64 primarily comprises a reference member 641 and a piston member 642, both of which are disposed within the second inner circumferential groove 632 of the adjustment ring 63. The piston member 642 is positioned between the reference member 641 and the adjustment ring 63. The reference member 641 is provided with a threaded through-hole 641H extending along the axis LL. On its side facing the piston member 642, and radially inwardly of the threaded through-hole 641H, a circumferential groove 641P is provided. This circumferential groove 641P is recessed along the axis LL and is configured to receive and limit the axial movement of the first end of an elastic member 65, such as a coil spring. The piston member 642 is provided with a threaded hole 642H, also extending along the axis LL, on its side facing the reference member 641. This threaded hole 642H can be either a through hole or a blind hole, thereby allowing a threaded fastener 66 to be threadedly connected thereto after being threadedly passed through the threaded through-hole 641H. Furthermore, piston member 642 is provided with a through-hole 642P located radially inward of threaded hole 642H. Through-hole 642P is configured to allow elastic member 65 to threadably pass therethrough, but after the connection between the two is established, relative axial movement between elastic member 65 and through-hole 642P (i.e., piston member 642) is not permitted. In other words, as piston member 642P moves axially, elastic member 65 compresses or expands accordingly, but the connection position between piston member 642P and elastic member 65 remains unchanged.

[0078] Circumferential receiving grooves 632H are provided on the bottom surface of the second inner circumferential groove 632 of the adjustment ring 63 and are further recessed toward the ring gear 61 along the axis LL. These circumferential receiving grooves 632H are configured to receive the second end of the elastic member 65 opposite to the first end.

[0079] After the adjustment ring 63 is placed on the spindle, the assembly process of the additional adjustment assembly 64 is as follows:

[0080] First, the elastic member 65 is screwed through the through hole 642P of the piston member 642 to achieve a threaded connection therewith.

[0081] Then, the piston member 642 connected to the elastic member 65 is placed on the core shaft 62 so that it is located in the second inner circumferential groove 632 of the adjustment ring 63, and the end of the elastic member 65 facing the adjustment ring 63 is located in the circumferential receiving groove 632H.

[0082] Then, the reference member 641 is placed on the spindle 62 so that the exposed end of the elastic member 65 is completely located in the circumferential groove 641P of the reference member 641. Figure 6 Only two elastic members 65 are shown in the figure, but it is conceivable that the elastic member 65 is preferably a plurality of parts discretely arranged along the circumferential direction.

[0083] Then, the threaded fastener 55 is threadedly connected to the threaded through hole 641H and the threaded blind hole 642H, thereby achieving the threaded connection between the piston member 642 and the reference member 641 .

[0084] Finally, the collar SP is snapped into the receiving groove 621 of the spindle 62 to limit the axial movement of the reference member 641 away from the adjustment ring 63, thereby completing the assembly.

[0085] Thus, the relative position between the reference member 641 and the piston member 642 can be changed (i.e., the distance therebetween) by tightening the threaded fastener 66. Because the axial movement of the reference member 641 is limited by the retaining ring SP, this tightening allows the piston member 642 to move within a certain range of travel relative to the reference member 641. Specifically, for example, when the threaded fastener 66 is tightened to increase the distance between the piston member 642 and the reference member 641, the piston member 642 moves away from the reference member 641 toward the adjustment ring 63. This axial movement of the piston member 642 applies axial pressure to the adjustment ring 63 via the elastic member 65, causing the adjustment ring 63 (the adjustment surface thereof) to abut against the flange (the mating surface thereof) of the spindle 62.

[0086] When the size of the sealing gap G needs to be adjusted, the threaded fastener 66 can be screwed to move the piston 642 away from the adjustment ring 63. As the elastic member 65 reduces the axial pressure acting on the adjustment ring 63, the adjustment ring 63 has a certain ability to move axially. Since the stroke distance of the piston 642 is set to be larger than the axial engagement dimension LJ between the engagement section and the reference section of the engagement surface of the flange 620 (see the combination for details), the piston 642 can move axially. Figure 2C As described above, the axial movement of the piston member 642 allows the adjustment ring 63 to be disengaged from the flange 620, and allows the adjustment ring 63 to be rotated relative to the spindle 62 about the axis LL to change the circumferential orientation of the adjustment ring 63. This rotation can select the specific engagement position of the engagement section of the adjustment ring 63 and the flange 620 (i.e., select the actual engagement section on the adjustment ring 63), thereby achieving the purpose of adjusting the sealing gap G.

[0087] Figure 7 It is a cross-sectional view of another embodiment of the dynamic sealing structure according to the present utility model. Figure 7A yes Figure 7 A partial enlarged view of the dynamic sealing structure is shown. Figure 7B yes Figure 7 A cross-sectional view of an adjustment ring used in a dynamic sealing structure shown in FIG.

[0088] Figure 7-7B The dynamic sealing structure shown is similar to Figure 5-5D The difference between the dynamic sealing structures shown is mainly that the structure of the adjustment ring 73 used is different. Figure 5A and Figure 7A ,exist Figure 7A In the figure, the sealing ring 73 is arranged between the ring gear 71 and the spindle 72 of the transmission assembly 70. The sealing ring 73 is provided with an outer circumferential groove 731 recessed along the axis LL and running around the axis LL on the side facing the ring gear 71, which is used to position the shaft seal b, and is provided with an inner circumferential groove 730 recessed along the axis LL and coaxial with the outer circumferential groove 731 on the side facing away from the ring gear 71, which is used to receive the flange 720 of the spindle 72. The setting of the flange 720 is the same as that of the flange 520 of the spindle 52. The bottom surface 730S of the inner circumferential groove 730 is configured to serve as an adjustment surface. Figure 5 The difference of the dynamic sealing structure shown is that the side of the flange 720 of the spindle 72 facing the ring gear 71 is configured to serve as a joint surface.

[0089] Figure 8 It is a cross-sectional view of yet another embodiment of the dynamic sealing structure according to the present utility model. Figure 8A yes Figure 8 A partial enlarged view of the dynamic sealing structure is shown. Figure 8B and Figure 8C They are respectively composed Figure 8 Exploded perspective views of components of the dynamic sealing structure shown from different perspectives.

[0090] and Figure 1 The difference between the dynamic sealing structure of the prior art shown in Figure 8 In the dynamic sealing structure shown in FIG, an adjustment washer 83 is provided between the flange 820 of the spindle 82 of the transmission assembly 80 and the bearing on the side close to the flange 820, and the side of the adjustment washer 83 abutting the flange 820 is configured to serve as an adjustment surface. The specific structure is shown in FIG. Figure 8B and with Figure 2D The radially outer circumferential side of the adjusting washer 83 is configured to abut against the radially inner side of the oil seal steel ring. Similarly, the side of the flange 820 that abuts against the adjusting washer 83 is configured to serve as a joint surface, and its specific structure is shown in FIG. Figure 8C and with Figure 2C The structure of the joint surface 210 shown in FIG. 1 is similar.

[0091] See also Figure 8A temperature sensing device T, such as a temperature sensor, may be additionally provided within the transmission assembly 80. To directly obtain the temperature of the oil seal ring, the temperature sensing device T may be provided on the radially outer side of the ring gear 81, and a channel 80C may be provided within the ring gear 81 leading to the oil seal ring disposed near one side of the ring gear 81. The sensing circuit of the temperature sensing device T may be arranged along the channel 80C to reach (i.e., contact) the oil seal ring, thereby achieving direct temperature sensing.

[0092] Alternatively, the temperature sensing device T may be disposed on the radially or axially outer side of the spindle, such as Figure 4 As shown in the figure, a channel 40C is opened in the spindle 42 leading to the oil seal steel ring provided on one side close to the spindle 42 for arranging the sensing circuit of the temperature sensing device.

[0093] Furthermore, it should be noted that while the background technology section mentions the technical field of transmissions, the applications of the selectively assembled dynamic seal structure of the present invention are not limited thereto. Those skilled in the art should be able to envision other suitable applications based on the description of the dynamic seal structure of the present invention. Furthermore, the description of the location of the temperature sensing device T is not exhaustive, and those skilled in the art should be able to envision other suitable locations based on the actual application and structure.

[0094] Although several embodiments of the present invention have been described with reference to the accompanying drawings, as will be apparent to those skilled in the art, various modifications may be made to the above embodiments without departing from the scope defined by the appended claims. The above embodiments are provided merely as examples to illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention. Features or elements described in one embodiment may be incorporated into another embodiment unless they conflict with existing features or elements in another embodiment.

Claims

1. A dynamic sealing structure capable of selective assembly, characterized in that: The dynamic sealing structure comprises: a first component (21, 31, 41, 51) having a first axial side; a second component (22, 32, 42, 52) having a second axial side and configured to be mounted coaxially with the first component along an axis such that the second axial side is disposed opposite the first axial side and the first and second components are configured to rotate relative to each other about the axis; and An adjustment structure is configured to form a dynamic seal between the first component and the second component, and an axial size of a formed sealing gap (G) can be varied by varying a circumferential orientation of the adjustment structure about the axis.

2. The dynamic sealing structure according to claim 1, characterized in that: The regulating structure comprises: an adjustment surface (230) configured to abut against a joint surface (210) provided on one of the first component and the second component, and provided with at least two sections arranged along a circumferential direction around the axis, one of the at least two sections protruding relative to the other along the axis to have a non-zero axial adjustment dimension; and The joining surface (210) is configured to have a joining section (21S1) and a reference section (21S2) arranged around the axis, the joining section protruding a non-zero axial joining dimension (LJ) along the axis relative to the reference section, and the axial joining dimension is configured to be larger than the axial adjustment dimension, and the circumferential dimension of the joining section is smaller than the circumferential dimension of any one of the at least two sections.

3. The dynamic sealing structure according to claim 2, characterized in that: Each of the at least two sections, the joining section and the reference section includes two subsections that are symmetrically or asymmetrically arranged along a diameter direction.

4. The dynamic sealing structure according to claim 3, characterized in that: The at least two segments include a first segment (23S1), a second segment (23S2), and a third segment (23S3), and the second segment protrudes along the axis by a first axial adjustment dimension (L1) relative to the first segment, and the third segment protrudes along the axis by a second axial adjustment dimension (L2) relative to the first segment, and the second axial adjustment dimension is greater than the first axial adjustment dimension; and The axial engagement dimension is configured to be greater than the second axial adjustment dimension.

5. The dynamic sealing structure according to claim 3, characterized in that: The adjustment structure comprises an adjustment ring, which is coaxially arranged between the first component and the second component and radially and / or axially positioned by the first component, and is provided with: a first side disposed perpendicular to the axis, the first side being configured to abut against the first axial side, wherein the first side is provided with the adjustment surface, and the first axial side is provided with the engagement surface for engaging with the adjustment surface; and A second side is axially opposite to the first side, and the second side is arranged to form the sealing gap with the second axial side.

6. The dynamic sealing structure according to claim 3, characterized in that: The adjustment structure includes an adjustment ring, which is arranged between the first component and the second component and is provided with: A first side is configured to be provided with: a circumferential groove (330) configured to be recessed relative to the first side along the axis for receiving the first axial side, a bottom surface (330S) of the circumferential groove being configured as the adjustment surface, and the first axial side being provided with the engagement surface for engaging with the adjustment surface; and a flange located radially outward of the circumferential groove, wherein a connecting member extends through the flange along the axis to detachably connect the adjusting ring to the first component; and a second side axially opposite to the first side, the second side being configured to form the sealing gap with the second axial side.

7. The dynamic sealing structure according to claim 3, characterized in that: The adjustment structure includes an adjustment ring configured to abut on a third axial side of the second component opposite to the second axial side and provided with: a first side, the first side being configured to face the first component and being provided with: an outer circumferential groove configured to receive an oil seal for sealing between the first component and the second component, wherein the sealing gap is formed between an outer circumferential wall (531R) located radially outside the outer circumferential groove and the first component; and An inner circumferential groove has a bottom surface configured to serve as the regulating surface, and the third axial side is provided with the engagement surface for engaging with the regulating surface provided on the third axial side.

8. The dynamic sealing structure according to claim 7, characterized in that: The adjustment ring is further provided with a second side opposite to the first side, the second side being provided with a second inner circumferential groove (632) recessed along the axis, the second inner circumferential groove being configured to receive an additional adjustment assembly (64) to change the circumferential orientation of the adjustment ring about the axis; as well as The dynamic sealing structure further comprises a collar (SP) which is fixed relative to the second component so as to cooperate with the adjustment ring to axially position the additional adjustment assembly.

9. The dynamic sealing structure according to claim 8, characterized in that: The additional adjustment component includes: A reference member (641), the reference member being configured to have: A first side, wherein the first side of the reference member is provided with a receiving groove (641P) for receiving one end of the elastic member (65); and a second side of the reference member opposite the first side, the second side of the reference member being configured for axial abutment with the collar; a threaded hole (641H) extending along the axis, located radially outside the receiving groove, and capable of being threadedly engaged with a fastener (66); and A piston member (642) configured to have: a through hole (642P), the through hole being configured to allow a portion of the elastic member to be spirally passed therethrough, but being capable of maintaining the relative position of the piston member and the elastic member after the connection is completed; a matching threaded hole (642H) configured to receive the fastener through the threaded hole of the reference member, thereby enabling the axial distance between the piston member and the reference member to be changed by screwing the fastener, Wherein, a receiving groove (632H) for receiving the other end of the elastic member is also provided on the second side of the adjusting ring.

10. The dynamic sealing structure according to claim 9, characterized in that: The axial movement stroke of the piston member is greater than the axial adjustment dimension.

11. The dynamic sealing structure according to claim 3, characterized in that: The adjustment structure includes an adjustment ring, which is arranged between the first component and the second component and is provided with: a first side, the first side being configured to face the first component and provided with an outer circumferential groove, the outer circumferential groove being configured to be recessed relative to the first side along the axis for receiving an oil seal that performs a sealing function between the first component and the second component, the sealing gap being formed between an outer circumferential wall located radially outside the outer circumferential groove and the first component; and A second side opposite to the first side along the axis is provided with an inner circumferential groove, the inner circumferential groove is configured to be recessed relative to the second side along the axis, the bottom surface of the inner circumferential groove is configured to serve as the adjustment surface, and the second axial side is provided with the engagement surface for engaging with the adjustment surface.

12. The dynamic sealing structure according to claim 3, characterized in that: The adjustment structure includes an adjustment washer (83), which is arranged between the first component and the second component and is located radially inside an oil seal steel ring also arranged between the first component and the second component, and is provided with the adjustment surface on a side facing the second component, and a joint surface for engaging with the adjustment surface is provided on the second axial side.

13. The dynamic sealing structure according to any one of claims 1 to 12, characterized in that: One of the first component and the second component is a fixed member fixed relative to the axis, and the other of the first component and the second component is a rotating member rotatable around the axis relative to the fixed member.

14. The dynamic sealing structure according to claim 13, characterized in that: The dynamic sealing structure is provided with a temperature sensing device (T) arranged for directly sensing the temperature of the dynamic sealing structure via a sensing line running through a passage (40C, 80C) running through one of the first component and the second component.

15. The dynamic sealing structure according to claim 14, characterized in that: One end of the sensing line away from the temperature sensing device (T) is arranged to contact an oil seal steel ring provided near the one of the first component and the second component.

16. An engineering machinery component, characterized in that: The construction machine assembly is configured to use the dynamic sealing structure according to any one of claims 1-15.

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