A shaft assembly lubrication method and system

Abstract

This invention relates to the field of drive shaft assembly technology, specifically to a method and system for grease injection into a shaft assembly. The method includes positioning and clamping the shaft assembly after pre-installation, with a peeling unit abutting against a first peeling area of ​​a dustproof unit on the shaft assembly; wherein a first deformable distance is greater than zero, and a first deformation distance is greater than zero; the first deformable distance is the length of the dustproof unit deformable along the axial direction of the dustproof unit and located above the abutment point of the peeling unit; the first deformation distance is the length of the dustproof unit deformable along the axial direction of the dustproof unit and located below the abutment point of the peeling unit; the peeling unit drives at least a portion of the dustproof unit to separate from the housing of the shaft assembly, forming a grease injection opening; the grease injection unit injects a predetermined amount of grease from the grease injection opening into the rotational space surrounded by the dustproof unit and the housing near the grease injection opening side; the peeling unit separates from the dustproof unit. This solves the problem of poor reset of the dustproof sleeve after grease injection into the dustproof sleeve.

Description

Technical Field

[0001] This invention relates to the field of transmission shaft assembly technology, and more specifically, to a method and system for grease injection into shaft assemblies. Background Technology

[0002] During the assembly of the drive shaft, a dust cover is fitted over the drive shaft to block external impurities and prevent internal lubricating grease from leaking out. Before the dust cover is tightened to the outer circumference of the housing, a certain amount of lubricating grease is usually added to the cavity between the dust cover and the housing. Current grease injection methods typically involve clamping and fixing the drive shaft with a fixture, then using a peeling unit to pry open the corrugated sleeve of the dust cover to one side to create an opening. Lubricating grease is then injected into the cavity of the dust cover through the opening using a grease gun. Subsequently, the peeling unit separates from the dust cover, allowing the corrugated sleeve to spring back to its original position.

[0003] In the above method, the corrugated sleeve is usually only partially opened to one side in its circumferential direction for grease injection. Grease tends to accumulate in the cavity on the opened side, resulting in different degrees of grease occupation in the cavities on both sides. Since the corrugated sleeve relies on its own elasticity to rebound, the side with more grease will rebound less, while the side without grease will rebound more. This inconsistent rebound on both sides will cause the dust cover to not reset smoothly, requiring an additional process to align the dust cover and fit it onto the outer periphery of the shell. Summary of the Invention

[0004] To address the problem of dust sleeves not resetting smoothly after grease injection, this invention provides a grease injection method and system for shaft assemblies.

[0005] In a first aspect, the present invention provides a method for lubricating a shaft assembly, the method comprising:

[0006] The grease injection method for the shaft assembly includes:

[0007] Based on the pre-installed positioning and clamping of the shaft assembly, the peeling unit abuts against the first peeling area of ​​the dustproof unit of the shaft assembly; wherein, the first deformable distance is greater than zero, and the first deformation distance is greater than zero; the first deformable distance is the length of the dustproof unit that can deform along the axial direction of the dustproof unit and above the abutment point of the peeling unit; the first deformation distance is the length of the dustproof unit that can deform along the axial direction of the dustproof unit and below the abutment point of the peeling unit;

[0008] The stripping unit drives at least a portion of the dustproof unit to separate from the housing of the shaft assembly, forming a grease injection opening;

[0009] The grease injection unit injects a set amount of grease from the grease injection opening into the rotating space surrounded by the dustproof unit and the housing, close to the grease injection opening.

[0010] The stripping unit is separated from the dustproof unit.

[0011] Optionally, the first deformable distance is greater than the first deformable distance.

[0012] Optionally, the step of positioning and clamping the shaft assembly after pre-installation, with the peeling unit abutting against the first peeling area of ​​the dustproof unit of the shaft assembly, includes:

[0013] Based on the pre-installed positioning and clamping of the shaft assembly, the first peeling part of the peeling unit abuts against the first peeling area of ​​the dustproof unit of the shaft assembly; wherein, the first deformable distance is the length of the dustproof unit that can deform along the axial direction of the dustproof unit and above the abutment of the first peeling part; the first deformation distance is the length of the dustproof unit that can deform along the axial direction of the dustproof unit and below the abutment of the first peeling part.

[0014] Based on the first peeling portion abutting against the first peeling area of ​​the dustproof unit of the shaft assembly, the second peeling portion of the peeling unit abutting against the second peeling area of ​​the dustproof unit of the shaft assembly; wherein, the first peeling portion and the second peeling portion are symmetrically arranged on both sides of the axis of the dustproof unit; the second deformable distance is greater than zero, and the second deformation distance is greater than zero; the second deformable distance is the length of the dustproof unit that can be deformed along the axis of the dustproof unit and located above the abutting point of the second peeling portion; the second deformation distance is the length of the dustproof unit that can be deformed along the axis of the dustproof unit and located below the abutting point of the second peeling portion.

[0015] Optionally, the first deformable distance is greater than the second deformable distance; the grease injection opening is located on the side close to the first peeling portion.

[0016] Optionally, in the step where the peeling unit drives at least a portion of the dustproof unit to separate from the housing of the shaft assembly to form a grease injection opening, the distance the first peeling part moves along the axial direction of the dustproof unit is greater than the distance the second peeling part moves along the axial direction of the dustproof unit.

[0017] Optionally, the stripping unit is separate from the dustproof unit, comprising:

[0018] The second peeling section separates from the dustproof unit;

[0019] After the second peeling part separates from the dustproof unit and a set time is waited, the first peeling part separates from the dustproof unit.

[0020] Optionally, the shaft assembly includes a dustproof unit, a housing, and a shaft body;

[0021] The method of positioning and clamping the shaft assembly after pre-installation, with the peeling unit abutting against the first peeling area of ​​the dustproof unit of the shaft assembly, includes:

[0022] One end of the dustproof unit is fitted onto the shaft and connected to the shaft, while the other end is open.

[0023] The housing is fitted onto the end of the shaft body near the opening of the dustproof unit to complete the pre-assembly of the shaft assembly;

[0024] Position and clamp the shaft assembly vertically with one end of the housing facing upwards.

[0025] The housing is positioned and clamped; wherein at least a portion of the housing abuts against the opening side of the dustproof unit;

[0026] The peeling unit abuts against the first peeling area of ​​the dustproof unit of the shaft assembly.

[0027] In a second aspect, the present invention provides a shaft assembly grease injection system, wherein the shaft assembly grease injection system is applied to any of the shaft assembly grease injection methods described in the first aspect, and the shaft assembly grease injection system comprises:

[0028] Shaft assembly, including dustproof unit, housing, and shaft body;

[0029] Fixing component, used to fix the shaft assembly;

[0030] The grease injection assembly includes a peeling unit and a grease injection unit; the peeling unit is connected to a fixing component; the grease injection unit is connected to the fixing component; the peeling unit is used to separate the dustproof unit and the housing; the grease injection unit is used to inject grease into the rotation space surrounded by the dustproof unit and the housing.

[0031] The pre-assembled shaft assembly includes one end of the dustproof unit fitted onto the shaft body and connected to the shaft body, and the other end being open. The housing is fitted onto the end of the shaft body near the opening side of the dustproof unit.

[0032] Optionally, the peeling unit includes a first peeling section, a second peeling section, a first vertical moving section, a first translational moving section, a second vertical moving section, and a second translational moving section; the first vertical moving section and the second vertical moving section are respectively connected to a fixing component; the first vertical moving section is driven to the first translational moving section, driving the first translational moving section to reciprocate in a vertical direction; the first translational moving section is driven to the first peeling section, driving the first peeling section to move away from or towards the second peeling section; the second vertical moving section is driven to the second translational moving section, driving the second translational moving section to reciprocate in a vertical direction; the second translational moving section is driven to the second peeling section, driving the second peeling section to move away from or towards the first peeling section.

[0033] Optionally, the dustproof unit includes a first connecting part, a corrugated sleeve, and a second connecting part; the first connecting part, the corrugated sleeve, and the second connecting part are connected in sequence; the first peeling area and the second peeling area are located on the outer peripheral surface of the corrugated sleeve;

[0034] The pre-assembled shaft assembly includes the second connecting part and at least part of the corrugated sleeve, both of which are fitted onto the shaft body. The second connecting part is connected to the shaft body, the first connecting part is open, and the housing is fitted onto the end of the shaft body near the first connecting part.

[0035] To solve the problem of poor repositioning of the dust cover after grease injection, the present invention has the following advantages:

[0036] The peeling unit abuts against the first peeling area of ​​the dustproof unit and drives at least part of the dustproof unit to separate from the shell to form a grease injection opening. This allows the grease injection unit to directly inject a set amount of grease into the rotating space surrounded by the dustproof unit and the shell through the opening. This completes the grease injection of the dustproof cover while the drive shaft remains stationary and does not rotate, replenishing the grease in the ball cage and reducing the risk of internal grease overflow by occupying space with grease. This reduces the structural complexity and space occupation caused by the rotating grease injection equipment. By limiting the first deformable distance and the first deformation distance to be greater than zero, the dustproof unit above and below the peeling unit abuts retains deformable length, which facilitates the formation of the grease injection opening and the rebound recovery of the dustproof unit after grease injection. It is less likely to cause sleeve tearing or poor rebound due to a lack of deformation margin in some areas. By injecting a set amount of grease into the side near the grease injection opening through the grease injection unit, the grease is concentrated in the vicinity of the opening and occupies the cavity in the rotating space. This helps to control the amount of grease injected and the rebound shape, and improves the accessibility of grease injection in a confined space. Attached Figure Description

[0037] Figure 1 A schematic diagram of a grease injection method for a shaft assembly according to one embodiment is shown;

[0038] Figure 2A schematic diagram of a shaft assembly grease injection system according to one embodiment is shown;

[0039] Figure 3 A partial schematic diagram of a shaft assembly grease injection system according to one embodiment is shown;

[0040] Figure 4 A partial cross-sectional view of a shaft assembly grease injection system according to one embodiment is shown.

[0041] Reference numerals: 10, fixing component; 11, first fixing part; 12, second fixing part; 20, grease injection component; 21, peeling unit; 211, first peeling part; 212, second peeling part; 213, first vertical moving part; 214, first translational part; 215, second vertical moving part; 216, second translational part; 22, grease injection unit; 221, grease injection part; 222, drive part; 30, shaft assembly; 31, dustproof unit; 311, first connecting part; 312, corrugated sleeve; 313, second connecting part; 32, housing; 33, shaft body. Detailed Implementation

[0042] The present disclosure will now be discussed with reference to several exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and thus implement the present disclosure, and are not intended to imply any limitation on the scope of the disclosure.

[0043] As used herein, the term "comprising" and its variations are to be interpreted as open-ended terms meaning "including but not limited to". The term "based on" is to be interpreted as "at least partially based on". The terms "one embodiment" and "an embodiment" are to be interpreted as "at least one embodiment". The term "another embodiment" is to be interpreted as "at least one other embodiment". The terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "vertical", "horizontal", "lateral", "longitudinal", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments and are not intended to limit the indicated devices, elements, or components to having a specific orientation or being constructed and operated in a specific orientation. Furthermore, some of the above terms may be used to indicate other meanings besides orientations or positional relationships; for example, the term "upper" may in some cases indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application according to the specific circumstances. In addition, the terms "installed", "set up", "equipped with", "connected", and "linked" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, elements, or components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. Furthermore, the terms "first," "second," etc., are mainly used to distinguish different devices, elements, or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0044] In the grease injection process of the shaft assembly 30, it is usually necessary to separate the dustproof unit 31 from the housing 32 to form a grease injection channel, and then inject grease into the rotational space surrounded by the dustproof unit 31 and the housing 32 through the grease injection unit 22. However, in the prior art, the dustproof unit 31 is usually only partially opened to one side in its circumferential direction for grease injection. Grease tends to accumulate in the rotational space on the opened side, resulting in different degrees of grease occupation on both sides of the rotational space. Since the dustproof unit 31 relies on its own elastic rebound to restore its covering state to the housing 32, the side occupied by more grease is squeezed by grease and has a smaller rebound amount, while the side not occupied by grease or with less grease has a larger rebound amount. The inconsistent rebound amount on both sides will cause the dustproof unit 31 to not reset smoothly and cannot return to the predetermined covering position. In this case, it is often necessary to set up an additional process to manually align the dustproof unit 31 and re-fit it to the outer periphery of the housing 32, which increases the production process and production cost and reduces production efficiency. In addition, if the dustproof unit 31 is not reset properly, it may affect the sealing performance of the shaft assembly 30, leading to grease leakage or external impurities entering the rotation space during subsequent use, affecting the service life and operational reliability of the shaft assembly 30.

[0045] Example 1:

[0046] The grease injection system for the shaft assembly 30, used in the grease injection method, includes the shaft assembly 30, the fixing assembly 10, and the grease injection assembly 20; such as Figure 2 As shown, the shaft assembly 30 includes a dustproof unit 31, a housing 32, and a shaft body 33; the pre-assembled shaft assembly 30 includes: the housing 32 and the shaft body 33 connected sequentially along their own axial direction; one end of the tubular dustproof unit 31 is sleeved on the outer peripheral surface of the housing 32, and the other end of the dustproof unit 31 is sleeved on the outer peripheral surface of the shaft body 33; the fixing assembly 10 is used to fix the shaft assembly 30; the grease injection assembly 20 includes a peeling unit 21 and a grease injection unit 22; the grease injection unit 22 is used to inject grease into the space surrounding the dustproof unit 31; the peeling unit 21 is used to separate at least part of the dustproof unit 31 from the housing 32;

[0047] In this embodiment, as Figure 1 As shown, a method for grease injection of a shaft assembly 30 is provided, the method including steps S10-S40;

[0048] In step S10, based on the pre-installation and positioning clamping of the shaft assembly 30, the peeling unit 21 abuts against the first peeling area of ​​the dustproof unit 31 of the shaft assembly 30; wherein, the first deformable distance is the length of the dustproof unit 31 that is still deformable along the axial direction of the dustproof unit 31 and located above the abutment of the peeling unit 21 and the dustproof unit 31, and the first deformation distance is the length of the dustproof unit 31 that is still deformable along the axial direction of the dustproof unit 31 and located below the abutment of the peeling unit 21 and the dustproof unit 31; both the first deformable distance and the first deformation distance are greater than zero, so that the dustproof unit 31 above and below the abutment of the peeling unit 21 and the dustproof unit 31 retains deformable allowance, which is convenient for the subsequent peeling unit 21 to drive separation and form an opening, and also convenient for the dustproof unit 31 to rebound and recover after grease injection, and is less likely to cause sleeve tearing or poor rebound due to the lack of deformation allowance in some areas.

[0049] In step S20, the peeling unit 21 moves from top to bottom, thereby driving at least part of the dustproof unit 31 to separate from the housing 32 of the shaft assembly 30, so that a grease injection opening is formed between the dustproof unit 31 and the housing 32; the opening exposes a channel for grease injection between the dustproof unit 31 and the housing 32, which facilitates the insertion of the grease injection unit 22.

[0050] In step S30, the grease injection unit 22 moves to the grease injection opening and injects a set amount of grease from the grease injection opening into the rotating space surrounded by the dustproof unit 31 and the housing 32 on the side near the grease injection opening.

[0051] In step S40, based on the injection of a set amount of grease, the peeling unit 21 and the dustproof unit 31 are separated; after the dustproof unit 31 loses the pull of the peeling unit 21, it recovers by its own elasticity and covers the space between the housing 32 and the shaft 33, thus completing the grease injection.

[0052] Since the stripping unit 21 compresses and reduces the volume of the part of the rotating space near the grease injection opening, the amount of grease that this part of the space can hold is reduced accordingly. Therefore, during the process of the grease injection unit 22 injecting grease into the rotating space, some grease will move from the area of ​​the rotating space near the grease injection opening to the area away from the grease injection opening. This avoids all the grease accumulating in the part of the space near the grease injection opening, so that the grease is distributed as evenly as possible in the rotating space. This allows the dustproof unit 31 to rebound smoothly by its own elasticity, thereby improving production efficiency.

[0053] Furthermore, the first deformable distance is greater than the first deformation distance, meaning the deformable length above the contact point of the peeling unit 21 is greater than the length below. This causes the grease injection opening to be more upward-biased, with a larger upper cavity margin, facilitating the grease injection unit 22 to extend into the upper opening for grease injection and control of rebound. Since grease mainly accumulates at the bottom of the rotation space under gravity, in this arrangement, compared to a scheme where the first deformable distance is less than or equal to the first deformation distance, the dustproof unit 31, which mainly carries the grease, is compressed more under the premise that the travel distance of the peeling unit 21 remains unchanged. This minimizes the volume of the bottom of the rotation space near the grease injection opening, making it easier for the grease to migrate from the rotation space near the grease injection opening to the rotation space away from the grease injection opening under gravity.

[0054] Furthermore, step S10 includes steps S11 and S12, which will be described in detail below: steps S11, S12, and steps S20-S40 are executed sequentially.

[0055] In step S11, based on the pre-installed shaft assembly 30 positioning and clamping, the first peeling portion 211 of the peeling unit 21 abuts against the first peeling area of ​​the dustproof unit 31 of the shaft assembly 30; wherein, the first deformable distance is the length of the dustproof unit 31 that can deform along the axial direction of the dustproof unit 31 and located above the abutment of the first peeling portion 211 and the dustproof unit 31; the first deformation distance is the length of the dustproof unit 31 that can deform along the axial direction of the dustproof unit 31 and located below the abutment of the first peeling portion 211 and the dustproof unit 31.

[0056] In step S12, the first peeling part 211 abuts against the first peeling area, and the second peeling part 212 abuts against the second peeling area. The first and second peeling areas are symmetrically arranged on both sides of the axis of the dustproof unit 31. The second deformable distance is greater than zero. The second deformable distance is the length of the dustproof unit 31 that can deform along the axis of the dustproof unit 31 and above the point where the second peeling part 212 abuts against the dustproof unit 31. The second deformation distance is the length of the dustproof unit 31 that can deform along the axis of the dustproof unit 31 and below the point where the second peeling part 212 abuts against the dustproof unit 31. The first peeling part 211 and the second peeling part 212 allow the two sides of the dustproof unit 31 to move separately from the housing 32, which helps the grease injection openings on both sides of the dustproof unit 31 to rebound as evenly as possible, facilitating the subsequent insertion of the dust cover into the surrounding components.

[0057] Meanwhile, after the first peeling part 211 abuts against the dustproof unit 31, it can provide a reference for the specific position of the second peeling part 212 abutting against the dustproof unit 31, so that when switching between different models of shaft assembly 30 for grease injection, there is no need to readjust the operating procedure.

[0058] Furthermore, the first deformable distance is greater than the second deformable distance, and the grease injection opening is located on the side closer to the first peeling portion 211. That is, the deformable length on the side of the first peeling portion 211 is greater, and the opening is more biased towards the side of the first peeling portion 211, so that the grease injection opening is biased to the side of the first peeling area, and the grease injection unit 22 can extend more smoothly from the opening, and the grease injection position is closer to the opening. In addition, this method can make the difference in rebound speed between the part of the dustproof unit 31 near the first peeling area and the part of the dustproof unit 31 near the second peeling area after step S40 is completed smaller. On the other hand, when the downward stroke of the second peeling portion 212 is the same as that of the first peeling portion 211, the amount of compression of the bottom of the part of the rotation space near the first peeling area is greater than the amount of compression of the bottom of the part of the rotation space near the second peeling area, thereby realizing the movement of grease from the rotation space near the first peeling area to the rotation space near the second peeling area.

[0059] Furthermore, during step S20, when the dustproof unit 31 is separated from the housing 32 to form the grease injection opening, the first peeling part 211 moves a greater distance along the axis of the dustproof unit 31 than the second peeling part 212, resulting in a larger opening on the side of the first peeling part 211. This is adapted to the arrangement of the grease injection opening near the side of the first peeling part 211, facilitating the grease injection unit 22 to extend into the larger opening. Simultaneously, the volume of the rotation space near the first peeling area can be further compressed, allowing the grease to move more quickly into the rotation space near the second peeling area after entering the rotation space on the side of the grease injection opening.

[0060] Furthermore, step S40 includes steps S41 and S42, which will be described in detail below: steps S11, S12, S20, S30, S41, and S42 are executed sequentially.

[0061] In step S41, the second peeling part 212 first separates from the dustproof unit 31;

[0062] In step S42, after the second peeling part 212 separates from the dustproof unit 31 and waits for a set time (the set time can be 3s, 5s, or 10s), the first peeling part 211 separates from the dustproof unit 31 again.

[0063] The second stripping section 212 separates from the dustproof unit 31, which allows the volume of the rotating space near the second stripping area to be expanded. The resistance to the movement of grease towards the larger volume area is small, making it easier for grease to move from the position near the first stripping area to the position near the second stripping area within the rotating space. This ensures that the amount of grease in the two parts of the rotating space near the first and second stripping areas is as equal as possible.

[0064] Furthermore, step S10 includes steps S101-S105, and each step will be described in detail below: steps S101-S105 and steps S20-S40 are executed sequentially.

[0065] Step S101: The inner circumferential surface of one end of the dustproof unit 31 is fitted onto the outer circumferential surface of the shaft 33 and connected to the shaft 33; the other end of the dustproof unit 31 is open.

[0066] Step S102: Fit the housing 32 onto the end of the shaft 33 near the opening of the dustproof unit 31 (i.e., the end of the dustproof unit 31 away from the shaft 33) to complete the pre-installation of the shaft assembly 30.

[0067] In step S103, the shaft assembly 30 is positioned vertically with one end of the housing 32 facing upwards, and the fixing assembly 10 positions and clamps the shaft 33.

[0068] Step S104: Position and clamp the housing 32, wherein at least a portion of the housing 32 abuts against the opening side of the dustproof unit 31;

[0069] In step S105, the peeling unit 21 abuts against the first peeling area of ​​the dustproof unit 31 of the shaft assembly 30. By making the shaft assembly 30 vertical, the housing 32 facing upward, and the shaft 33 and the housing 32 respectively positioned and clamped, the opening side of the dustproof unit 31 faces upward, and the drive shaft remains stationary and does not rotate. This facilitates the peeling unit 21 to abut against the first peeling area and pry open for grease injection, and also facilitates the stable rebound of the dustproof unit 31 after grease injection.

[0070] In this embodiment, the grease injection method for the shaft assembly 30 is used by first pre-installing the shaft assembly 30 and fixing the drive shaft vertically and keeping it stationary. The peeling unit 21 abuts against the first peeling area of ​​the dustproof unit 31 and separates it from the housing 32 to form a grease injection opening. Then, the grease injection unit 22 injects a set amount of grease through the grease injection opening. Finally, the peeling unit 21 disengages in sequence to allow the dustproof unit 31 to spring back and return to its original position. When it is necessary to switch to another shaft assembly 30, the greased shaft assembly 30 is removed, the next shaft assembly 30 is installed, and the above steps are repeated.

[0071] Example 2:

[0072] In this embodiment, a grease injection system for shaft assembly 30 is provided. This grease injection system is applied to a grease injection method for shaft assembly 30 in Embodiment 1, such as... Figure 2 , Figure 3 As shown, the grease injection system of shaft assembly 30 includes shaft assembly 30, fixing assembly 10 and grease injection assembly 20.

[0073] The shaft assembly 30 includes a dustproof unit 31, a housing 32, and a shaft body 33;

[0074] The fixing component 10 is used to fix the shaft assembly 30, so that the drive shaft remains stationary and does not rotate during the grease injection process. The fixing component 10 can fix the shaft assembly 30 in various ways, such as clamping the drive shaft to the fixing seat by threaded connection, or achieving quick clamping and release by snap-fit ​​connection, or achieving positioning and fixing by interference fit, or achieving fixed connection by welding or bonding. Those skilled in the art can select the appropriate method according to the clamping cycle and reuse requirements.

[0075] The grease injection assembly 20 includes a peeling unit 21 and a grease injection unit 22. The peeling unit 21 is connected to the fixing assembly 10 and is used to separate the dustproof unit 31 and the housing 32. The grease injection unit 22 is connected to the fixing assembly 10 and is used to inject grease into the rotation space. Since both the peeling unit 21 and the grease injection unit 22 are connected to the fixing assembly 10, the peeling and grease injection actions are coordinated on the same fixed reference, which facilitates the stable formation of the grease injection opening and the completion of quantitative grease injection in the confined space.

[0076] like Figure 4 As shown, the pre-assembled shaft assembly 30 includes a dustproof unit 31 whose inner circumferential surface is fitted and connected to the outer circumferential surface of the shaft body 33, and the other end of the dustproof unit 31 is open. The housing 32 is fitted on the end of the shaft body 33 near the opening side of the dustproof unit 31.

[0077] Furthermore, such as Figure 2 As shown, the peeling unit 21 includes a first peeling section 211, a second peeling section 212, a first vertical moving section 213, a first translational section 214, a second vertical moving section 215, and a second translational section 216. The first vertical moving section 213 and the second vertical moving section 215 are respectively connected to the fixing assembly 10. The first vertical moving section 213 is driven to the first translational section 214 to drive the first translational section 214 to reciprocate in the vertical direction. The first translational section 214 is driven to the first peeling section 211 to drive the first peeling section 211 to move away from or towards the second peeling section 212. The second vertical moving section 215 is driven to the second translational section 216 to drive the second translational section 216 to reciprocate in the vertical direction. The second translational section 216 is driven to the second peeling section 212 to drive the second peeling section 212 to move away from or towards the first peeling section 211. The first vertical displacement part 213 and the second vertical displacement part 215 provide vertical displacement, the first translation part 214 and the second translation part 216 provide horizontal clamping and clearance, and the first peeling part 211 and the second peeling part 212 can clamp the dustproof unit 31 and pry it open from both sides to form grease injection openings, so that the size of the grease injection openings on both sides can be flexibly adjusted according to the usage requirements, thereby making the part of the dustproof unit 31 near the first peeling area and the second peeling area rebound as consistently as possible.

[0078] Furthermore, such as Figure 4As shown, the dustproof unit 31 includes a first connecting part 311, a corrugated sleeve 312, and a second connecting part 313, which are connected in sequence. The first peeling area and the second peeling area are located on the outer peripheral surface of the corrugated sleeve 312. The first peeling part 211 and the second peeling part 212 of the peeling unit 21 abut against the corresponding areas on the outer peripheral surface of the corrugated sleeve 312 to pry it open. The corrugated sleeve 312 is a deformable sleeve body. It is pried open on both sides to form a grease injection opening for grease injection, and then recovers by elastic rebound. It is connected to the shaft 33 through the second connecting part 313. The first connecting part 311 is open, so that the dustproof unit 31 is stably sleeved between the shaft 33 and the housing 32 after pre-assembly, which facilitates the peeling unit 21 to apply force from the outer peripheral surface of the corrugated sleeve 312.

[0079] The shaft assembly 30 is pre-assembled, including the inner circumferential surface of the second connecting part 313 and the inner circumferential surface of at least part of the corrugated sleeve 312 respectively fitted onto the outer circumferential surface of the shaft body 33. The inner circumferential surface of the second connecting part 313 is connected to the outer circumferential surface of the shaft body 33. The first connecting part 311 is open. The housing 32 is fitted onto the end of the shaft body 33 near the first connecting part 311.

[0080] In this embodiment, the grease injection system for the shaft assembly 30 is first fixed and kept stationary by the fixing component 10. The first peeling part 211 and the second peeling part 212 of the peeling unit 21 abut against the outer peripheral surface of the corrugated sleeve 312 from both sides and separate the dustproof unit 31 from the housing 32 to form a grease injection opening. The grease injection unit 22 injects a set amount of grease into the rotation space through the grease injection opening. Finally, the peeling unit 21 disengages in sequence to allow the dustproof unit 31 to spring back to its original position. When maintenance or replacement of the peeling part is required, the drive connection between the first translation part 214 and the first peeling part 211, and the second translation part 216 and the second peeling part 212 can be disconnected to remove the corresponding peeling part individually.

[0081] In other embodiments, such as Figure 2 As shown, the fixing component 10 includes a first fixing part 11 and a second fixing part 12; the first fixing part 11 is used to position and clamp the end of the housing 32 away from the shaft 33, and the second fixing part 12 is used to position and clamp the end of the shaft 33 away from the housing 32. The positioning and clamping of the first fixing part 11 and the second fixing part 12 can keep the drive shaft in position and prevent it from swinging, which makes it easy for the peeling unit 21 to stably abut and pry open.

[0082] In other embodiments, such as Figure 2As shown, the grease injection unit 22 includes a grease injection section 221, a drive section 222, and a grease supply section. The grease injection section 221 is an end actuator that extends into the corrugated sleeve 312 through the grease injection opening to perform grease injection. The drive section 222 drives the grease injection section 221 to extend into the corrugated sleeve 312 through the opening and to move forward and backward. The grease supply section supplies grease to the grease injection section 221. Through the cooperation of the grease injection section 221, the drive section 222, and the grease supply section, the grease injection unit 22 can quantitatively and controllably inject grease into the rotation space near the opening side.

[0083] Those skilled in the art will understand that the above embodiments are specific examples of implementing this disclosure, and in practical applications, various changes can be made in form and detail without departing from the scope of this disclosure.

Claims

1. A method for grease injection into a shaft assembly, characterized in that, The grease injection method for the shaft assembly includes: Based on the pre-installed positioning and clamping of the shaft assembly, the peeling unit abuts against the first peeling area of ​​the dustproof unit of the shaft assembly; wherein, the first deformable distance is greater than zero, and the first deformation distance is greater than zero; the first deformable distance is the length of the dustproof unit that can deform along the axial direction of the dustproof unit and above the abutment point of the peeling unit; the first deformation distance is the length of the dustproof unit that can deform along the axial direction of the dustproof unit and below the abutment point of the peeling unit; The stripping unit drives at least a portion of the dustproof unit to separate from the housing of the shaft assembly, forming a grease injection opening; The grease injection unit injects a set amount of grease from the grease injection opening into the rotating space surrounded by the dustproof unit and the housing, close to the grease injection opening. The stripping unit is separated from the dustproof unit.

2. The method for grease injection into a shaft assembly according to claim 1, characterized in that, The first deformable distance is greater than the first deformation distance.

3. The method for grease injection into a shaft assembly according to claim 1, characterized in that, The method based on the pre-installed positioning and clamping of the shaft assembly, with the peeling unit abutting against the first peeling area of ​​the dustproof unit of the shaft assembly, includes: Based on the pre-installed positioning and clamping of the shaft assembly, the first peeling part of the peeling unit abuts against the first peeling area of ​​the dustproof unit of the shaft assembly; wherein, the first deformable distance is the length of the dustproof unit that can deform along the axial direction of the dustproof unit and above the abutment of the first peeling part; the first deformation distance is the length of the dustproof unit that can deform along the axial direction of the dustproof unit and below the abutment of the first peeling part. Based on the first peeling portion abutting against the first peeling area of ​​the dustproof unit of the shaft assembly, the second peeling portion of the peeling unit abutting against the second peeling area of ​​the dustproof unit of the shaft assembly; wherein, the first peeling portion and the second peeling portion are symmetrically arranged on both sides of the axis of the dustproof unit; the second deformable distance is greater than zero, and the second deformation distance is greater than zero; the second deformable distance is the length of the dustproof unit that can be deformed along the axis of the dustproof unit and located above the abutting point of the second peeling portion; the second deformation distance is the length of the dustproof unit that can be deformed along the axis of the dustproof unit and located below the abutting point of the second peeling portion.

4. The method for grease injection into a shaft assembly according to claim 3, characterized in that, The first deformable distance is greater than the second deformable distance; the grease injection opening is located on the side close to the first peeling portion.

5. The method for grease injection into a shaft assembly according to claim 3, characterized in that, In the step of the peeling unit driving at least part of the dustproof unit to separate from the housing of the shaft assembly to form a grease injection opening, the distance the first peeling part moves along the axial direction of the dustproof unit is greater than the distance the second peeling part moves along the axial direction of the dustproof unit.

6. The method for lubricating a shaft assembly according to claim 3, characterized in that, The stripping unit is separated from the dustproof unit, including: The second peeling section separates from the dustproof unit; After the second peeling part separates from the dustproof unit and a set time is waited, the first peeling part separates from the dustproof unit.

7. The method for grease injection into a shaft assembly according to claim 1, characterized in that, The shaft assembly includes a dustproof unit, a housing, and a shaft body; The method based on the pre-installed positioning and clamping of the shaft assembly, with the peeling unit abutting against the first peeling area of ​​the dustproof unit of the shaft assembly, includes: One end of the dustproof unit is fitted onto the shaft and connected to the shaft, while the other end is open. The housing is fitted onto the end of the shaft body near the opening of the dustproof unit to complete the pre-assembly of the shaft assembly; Position and clamp the shaft assembly vertically with one end of the housing facing upwards. The housing is positioned and clamped; wherein at least a portion of the housing abuts against the opening side of the dustproof unit; The peeling unit abuts against the first peeling area of ​​the dustproof unit of the shaft assembly.

8. A grease injection system for a shaft assembly, characterized in that, The shaft assembly grease injection system is applied to a shaft assembly grease injection method according to any one of claims 1-7, and the shaft assembly grease injection system comprises: Shaft assembly, including dustproof unit, housing, and shaft body; Fixing component, used to fix the shaft assembly; The grease injection assembly includes a peeling unit and a grease injection unit; the peeling unit is connected to a fixing component; the grease injection unit is connected to the fixing component; the peeling unit is used to separate the dustproof unit and the housing; the grease injection unit is used to inject grease into the rotation space surrounded by the dustproof unit and the housing. The pre-assembled shaft assembly includes one end of the dustproof unit fitted onto the shaft body and connected to the shaft body, and the other end being open. The housing is fitted onto the end of the shaft body near the opening side of the dustproof unit.

9. A shaft assembly grease injection system according to claim 8, characterized in that, The peeling unit includes a first peeling section, a second peeling section, a first vertical moving section, a first translational section, a second vertical moving section, and a second translational section; the first vertical moving section and the second vertical moving section are respectively connected to a fixing component; the first vertical moving section is driven to reciprocate along the vertical direction of the first translational section; the first translational section is driven to move away from or towards the second peeling section of the first peeling section; the second vertical moving section is driven to reciprocate along the vertical direction of the second translational section; the second translational section is driven to move away from or towards the second peeling section of the second peeling section.

10. A shaft assembly grease injection system according to claim 8, characterized in that, The dustproof unit includes a first connecting part, a corrugated sleeve, and a second connecting part; the first connecting part, the corrugated sleeve, and the second connecting part are connected in sequence; the first peeling area and the second peeling area are located on the outer peripheral surface of the corrugated sleeve; The pre-assembled shaft assembly includes the second connecting part and at least part of the corrugated sleeve, both of which are fitted onto the shaft body. The second connecting part is connected to the shaft body, the first connecting part is open, and the housing is fitted onto the end of the shaft body near the first connecting part.

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