Lubrication methods for cages, linear guides, and rolling elements

Abstract

The present invention discloses a lubricating method for a retainer, a linear guide rail, and a rolling element. The retainer includes: a lubricant injection hole, and a main board. The main board is provided with a main oil channel and two groups of branch oil channels. The main oil channel is connected to the lubricant injection hole, and the two groups of branch oil channels are both connected to the main oil channel. A receiving groove is provided on the main oil channel. The lubricant is gathered in the receiving groove and then flows to the two groups of branch oil channels. The branch oil channels can deliver lubricant to different positions of the rolling element circulation channel to achieve full lubrication of the rolling element. By improving the structure of the retainer, after the lubricant is injected, it can be evenly delivered to the rolling element under the guidance of the main oil channel and the branch oil channel. There is no need to increase the injection amount of the lubricant, and the phenomenon of lubricant leakage can be prevented.

Description

Technical Field

[0001] The invention relates to the technical field of linear guide rails, and in particular to a lubrication method for a retaining frame, a linear guide rail and a rolling element. Background Art

[0002] Linear guides (linear sliders) are also called line rails, slide rails, linear guides, and linear slides. They can be divided into three types: roller linear guides, cylindrical linear guides, and ball linear guides. The basic structure of a linear guide includes a track, a slider, an end cover, and a cage. The cage is installed between the track and the slider to form a circulating ballway for the steel ball. The end covers are installed at both ends of the slider. When the slider slides relative to the track, the steel ball rolls in the circulating ballway. In order to improve the smoothness of the steel ball rolling, lubricants are generally injected into the circulating ballway.

[0003] At present, the existing linear guide rail lubrication method is that the lubricant is injected from the oil port of the end cover, and after passing through the lubricating oil channel on the end cover to the circulation groove of the end cover (the circulation groove is connected to the end of the circulation ball track), the lubricant will overflow onto the steel ball. In other words, in the existing lubrication method, the lubricant will only lubricate the steel ball at the end of the circulation ball track, and the lubrication of the steel ball in the middle of the circulation ball track will only have a lubricating effect after rolling to the end.

[0004] The existing lubrication methods have the following shortcomings:

[0005] After the lubricant is injected from the end cover, it will be stored in the circulation groove along the lubricating oil channel on the end cover. When the steel ball passes through the circulation groove, it will be contaminated with some lubricant to achieve lubrication. The lubricant needs to be injected in a certain amount before it overflows, resulting in serious accumulation of lubricant in the circulation groove, and the steel balls in the middle of the circulation ball channel need to roll to the circulation groove to achieve lubrication. Although increasing the amount of lubricant injected can allow some lubricant to penetrate into the circulation ball channel, this method of adding amount is not what the company wants. Increasing the amount of lubricant injected will not only cause a waste of lubricant resources and increase costs, but also, too much lubricant in the linear guide rail will seep out of the gap to the outside of the linear guide rail, which is a phenomenon that is strictly prohibited.

[0006] Therefore, the present invention aims to propose a solution that can effectively lubricate the steel balls while controlling the injection amount of lubricant. Summary of the invention

[0007] In order to solve the problems existing in the prior art, the present invention provides a lubrication method for a retaining frame, a linear guide rail and a rolling element.

[0008] The technical solution adopted by the present invention to solve the technical problem is: a retainer, comprising:

[0009] lubricant injection hole, and

[0010] A main board, wherein the main board is provided with a main oil channel and two groups of branch oil channels, the main oil channel is connected to the lubricant injection hole, and the two groups of branch oil channels are both connected to the main oil channel;

[0011] The main oil channel is provided with a receiving groove, and the lubricant is gathered in the receiving groove and then flows to the two groups of branch oil channels. The branch oil channels can transport lubricant to different positions of the rolling body circulation channel to achieve sufficient lubrication of the rolling body.

[0012] Furthermore, each group of branch oil passages includes n branches, and the widths of the n branches are B1 to B2. n The lengths of the n branches are L1 to L n , where L1 / B1=L2 / B2=···=L n / B n .

[0013] Furthermore, taking the center line X of the main board as a reference, the closer the branch is to the center line X, the smaller the width of the branch is.

[0014] Furthermore, a protrusion is provided in the accommodating groove, an annular channel is formed between the protrusion and the wall of the accommodating groove, and a plurality of first stops are provided in the annular channel, and the width of the first stops gradually increases along the direction approaching the protrusion.

[0015] Furthermore, a second stopper and a third stopper are provided at the opening of the annular channel, and along the direction approaching the protrusion, the width of the second stopper gradually increases, and the width of the third stopper gradually decreases.

[0016] Furthermore, a fourth block is provided in the branch circuit.

[0017] Furthermore, the volume of the annular channel is less than or equal to 1.5 times the single injection amount of the lubricant.

[0018] Furthermore, felt is provided on the main oil channel and the two groups of branch oil channels.

[0019] The present invention also provides a linear guide rail, comprising: a retaining frame, a track, a slider and two end covers, wherein the retaining frame is installed between the track and the slider, a rolling body circulation channel is formed between the slider and the track, a plurality of rolling bodies are arranged in the rolling body circulation channel, and the two end covers are connected to the two ends of the slider.

[0020] The present invention also provides a rolling body lubrication method, which adopts the retaining frame, and the method includes the following steps: lubricant is injected from the lubricant injection hole to flow into the main oil channel, and the lubricant flows to two groups of branch oil channels after being buffered and gathered in the receiving groove; multiple outlets of the branch oil channels are connected to different positions of the rolling body circulation channel, and the lubricant enters different positions in the rolling body circulation channel to fully lubricate the rolling body.

[0021] Furthermore, the main oil channel includes: a first channel arranged along the length direction of the main board and a second channel arranged along the width direction of the main board, the first channel and the second channel intersect at the accommodating groove, the second stopper is located on the first channel, and the third stopper is located on the second channel.

[0022] Furthermore, the lubricant is input from the first channel, is diverted by the second block, enters the containing groove and flows to the second channel, and then flows to the n branches through the second channel.

[0023] The beneficial effect of the present invention is that the lubrication method for the retaining frame, linear guide rail and rolling body of the present invention improves the structure of the retaining frame. After the lubricant is injected, it can be evenly delivered to the rolling body under the guidance of the main oil channel and the branch oil channel. There is no need to increase the injection amount of the lubricant, and the phenomenon of lubricant leakage can be prevented. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0025] Figure 1 1 is a top view of the retainer of the present invention.

[0026] Figure 2 It is a side view of the retainer of the present invention.

[0027] Figure 3 It is a top view of the mainboard of the present invention.

[0028] Figure 4 It is a structural schematic diagram of the containing tank of the present invention.

[0029] Figure 5 It is a schematic diagram of the flow of the lubricant on the retaining frame of the present invention.

[0030] Figure 6 It is a structural schematic diagram of the linear guide rail of the present invention.

[0031] Figure 7 It is a schematic diagram of the horizontal wall hanging of the linear guide rail of the present invention.

[0032] Figure 8 It is a schematic diagram of the vertical wall hanging of the linear guide rail of the present invention.

[0033] Fig. 9 It is a schematic diagram of the inverted installation of the linear guide rail of the present invention.

[0034] In the figure: 1. retaining frame; 2. track; 3. slider; 4. end cover; 11. lubricant injection hole; 12. main board; 121. main oil channel; 122. branch oil channel; 123. receiving groove; 13. side plate; 1211. first channel; 1212. second channel; 124. protrusion; 125. annular channel; 126. first block; 127. second block; 128. third block; 129. fourth block; 130. connecting section one; 131. connecting section two; 132. connecting section three; 1301. positioning column. DETAILED DESCRIPTION

[0035] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0036] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0037] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] like Figures 1 to 5As shown, the present invention improves the structure of the retainer 1 so that the rolling body can be effectively lubricated. The retainer 1 of the present invention comprises: a lubricant injection hole 11 and a main board 12, on which a main oil channel 121 and two groups of branch oil channels 122 are provided, the main oil channel 121 is connected to the lubricant injection hole 11, and the two groups of branch oil channels 122 are both connected to the main oil channel 121; a receiving groove 123 is provided on the main oil channel 121, and the lubricant is gathered through the receiving groove 123 and then flows to the two groups of branch oil channels 122, and the branch oil channels 122 can deliver lubricant to different positions of the rolling body circulation channel to achieve full lubrication of the rolling body.

[0039] It should be noted that the rolling element reciprocates at a high frequency in the rolling element circulation channel. If the rolling element is not fully lubricated, the rolling element's circulation motion will be jammed, which will cause the linear guide to operate poorly. Insufficient lubrication will increase the friction between the rolling element and the rolling element circulation channel, causing the rolling element circulation channel to be prone to fatigue and shortening its service life. Therefore, whether the rolling element is fully lubricated directly affects the operating stability and service life of the linear guide. Based on this, the present invention improves the structure of the retainer 1.

[0040] The retainer 1 of the present invention comprises: a main board 12 and two side boards 13, the two side boards 13 are fixedly connected to the two ends of the main board 12, respectively, and the lubricant injection hole 11 is arranged on the side board 13, and the lubricant flows to the main oil channel 121 through the lubricant injection hole 11, and then flows to the two groups of branch oil channels 122 through the main oil channel 121. The two groups of branch oil channels 122 are symmetrically arranged along the center line of the length direction of the main board 12. It should be noted that the branch oil channel 122 is provided with a plurality of outlets, and different outlets are connected to different positions of the rolling body circulation channel, so that the lubricant can synchronously enter different positions (middle and end) of the rolling body circulation channel, and several rolling bodies can be fully lubricated without rolling to the circulation groove at the end for lubrication.

[0041] Specifically, each group of branch oil passages 122 includes n branches, and the widths of the n branches are B1 to B2. n , the lengths of the n branches are L1~L n , where L1 / B1=L2 / B2=···=L n / B n. The outlets of the n branches are connected to different positions of the rolling body circulation channel respectively. For example, taking n=6 as an example, the six branches are recorded as branch a, branch b, branch c, branch d, branch e, and branch f in the order of distance from the lubricant injection hole 11 from near to far. The main oil channel 121 includes a first channel 1211 arranged along the length direction of the main board 12 and a second channel 1212 arranged along the width direction of the main board 12. The first channel 1211 and the second channel 1212 meet at the receiving groove 123. The receiving groove 123 is located at the center of the main board 12, and the first channel 1211 and the second channel 1212 are arranged in a "cross" shape. The width of the first channel 1211 is equal to the width of the second channel 1212. Among them, the width of branch a is equal to that of branch f, the width of branch b is equal to that of branch e, the width of branch c is equal to that of branch d, and the length of the branch refers to the distance between the center line of the branch and the center line of the second channel 1212. Assume that the widths of branch a, branch b, branch c, branch d, branch e, and branch f are B1, B2, B3, B4, B5, and B6, respectively, and the lengths are L1, L2, L3, L4, L5, and L6, respectively, wherein L1 / B1=L2 / B2=L3 / B3=L4 / B4=L5 / B5=L6 / B6. In other words, the ratios between the length and width of each branch are the same. Moreover, the closer the distance to the center line (i.e., center line X) of the second channel 1212 is, the smaller the width of the branch. That is, B1=B6>B2=B5>B3=B4, L1=L6>L2=L5>L3=L4. The reason for this design is that when the lubricant flows from the second channel 1212 to each branch, each branch can deliver an equal amount of lubricant to different positions of the rolling body circulation channel to achieve uniform lubrication. It should be explained that, due to the different distances between each branch and the second channel 1212, the branch with a short distance will first be fed with lubricant, while the branch with a long distance will not be fed with lubricant until a while later. That is to say, if the widths of each branch are the same, the lubricant will first enter the middle part of the rolling body circulation channel, and will enter the two ends more slowly, which is not what we want. Therefore, the present invention designs the width of each branch and ensures that the ratio of length to width is the same. It is known that flow rate = flow velocity × cross-sectional area. Each branch should output the same amount of lubricant. Since the flow velocity of the branch closer to the second channel 1212 will be faster, the width of the branch closer to the second channel 1212 is designed to be smaller.

[0042] The purpose of providing the receiving groove 123 in the present invention is to enable the lubricant to flow to each branch more stably. The amount of lubricant injected at a time is fixed. If there is no receiving groove 123, the lubricant in the first channel 1211 flows to the second channel 1212, and when the second channel 1212 flows to each branch, there may be a flow interruption (the lubricant cannot be connected). By providing the receiving groove 123, the lubricant from the first channel 1211 will be first stored in the receiving groove 123, and then flow to the second channel 1212 after the receiving groove 123 is filled. In this way, the lubricant flowing to the second channel 1212 and each branch is always sufficient and stable.

[0043] In the use scenarios of linear guides, the installation methods of linear guides include upright installation (slider facing up), inverted installation (slider facing down), horizontal wall mounting, vertical wall mounting, etc. When the linear guide is wall-mounted, under the action of gravity, the lubricant may be biased towards one side, resulting in poor lubrication effect on the other side. For example, when the linear guide is wall-mounted, the right side of the retaining frame 1 faces downward, and when the lubricant is injected, more of it will flow to the right side, while less lubricant will flow to the left side. Based on this, the present invention further improves the structure of the retaining frame 1.

[0044] Specifically, a protrusion 124 is provided in the receiving groove 123, and an annular channel 125 is formed between the protrusion 124 and the wall of the receiving groove 123. A plurality of first stops 126 are provided in the annular channel 125, and the width of the first stops 126 gradually increases in the direction close to the protrusion 124. For example, there are four first stops 126, which are respectively located at four intersections of the first channel 1211 and the second channel 1212. The first stops 126 are fixedly connected to the protrusion 124, and the four first stops 126 are symmetrically arranged in pairs. The first stops 126 are, for example, curved, and the curvature direction is consistent with the flow direction of the lubricant. It should be noted that the presence of the first block 126 does not block the annular channel 125. When the linear guide is mounted horizontally on a wall, the first block 126 can reduce the degree to which the lubricant is biased to one side. The lubricant flowing out of the first channel 1211 enters the annular channel 125 and is blocked by the two first blocks 126. The curved shape can block more lubricants. When the lubricant reaches a certain amount, the lubricant will gradually flow over the first block 126 to the second channel 1212 on both sides. In this way, when the linear guide is mounted horizontally on a wall, when the lubricant flows from the first channel 1211 to the second channel 1212, the effect of gravity on the lubricant can be reduced, the situation of the lubricant being biased to one side can be improved, and the lubricant can be evenly diverted to both sides as much as possible. In addition, the first block 126 also has another function: the lubricant may contain some impurities, and the first block 126 can block some of the impurities, thereby improving the cleanliness of the lubricant flowing to each branch.

[0045] Specifically, a second stopper 127 and a third stopper 128 are provided at the opening of the annular channel 125 . Along the direction approaching the protrusion 124 , the width of the second stopper 127 gradually increases, and the width of the third stopper 128 gradually decreases. For example, there are two second stops 127 and two third stops 128, there are two openings between the annular channel 125 and the first channel 1211 (respectively denoted as opening k1 and opening k2), there are two openings between the annular channel 125 and the second channel 1212 (respectively denoted as opening k3 and opening k4), one second stop 127 is provided at the opening k1, another second stop 127 is provided at the opening k2, one third stop 128 is provided at the opening k3, another third stop 128 is provided at the opening k4, the two second stops 127 are provided opposite to each other, and the two third stops 128 are provided opposite to each other, that is, the widest parts of the two second stops 127 are both facing the protrusion 124, and the narrowest parts of the two third stops 128 are both facing the protrusion 124. When the lubricant flows from the first channel 1211 to the opening k1, it is diverted into the annular channel 125 by the tip of the second stop 127, so that the lubricant flows to the openings k3 and k4. When the linear guide is horizontally wall-mounted, when the lubricant flows to the openings k3 and k4, it will be diverted by the tip of the third block 128 and then flow to each branch. The resistance of the third block 128 to the lubricant can offset the influence of gravity, so that the lubricant flowing to the openings k3 and k4 is as uniform as possible. When the linear guide is vertically wall-mounted, due to the influence of gravity, the lubricant will flow more to the opening k2. The second block 127 is set at the opening k2, and the widest part of the second block 127 faces the protrusion 124, which can prevent excessive lubricant from flowing to the opening k2. In other words, the two second blocks 127 can play the role of forward diversion and reverse flow blocking.

[0046] For example, the cross-sectional shapes of the first stopper 126 , the second stopper 127 , and the third stopper 128 may be triangular, trapezoidal, semicircular, or the like.

[0047] That is to say, the present invention can adapt to different installation postures of the linear guide rail by setting blocks in the annular channel 125 and at the opening. Under different installation postures, the lubricant can flow to each branch as evenly as possible, thereby improving the uniformity and stability of rolling element lubrication. The mutual cooperation of the first block 126, the second block 127, and the third block 128 can make the lubricant flow to the two groups of branch oil channels 122 as evenly as possible when the linear guide rail is horizontally wall-mounted or vertically wall-mounted, so that the multiple rolling elements in the circulation channel can be effectively lubricated, thereby improving the smoothness and stability of the operation of the linear guide rail.

[0048] It should be noted that the volume of the annular channel 125 is less than or equal to 1.5 times the single injection amount of the lubricant. Since the injection of the lubricant of the linear guide is timed and quantitative, the volume of the annular channel 125 is set not to exceed the single injection amount of the lubricant. If the injection amount of the lubricant is too large, the effect of the block may be weakened, which may still cause the rolling element on one side to not be effectively lubricated in the wall-mounted posture.

[0049] For example, a fourth stopper 129 may be provided at the entrance of the branch. Specifically, a fourth stopper 129 may be provided at the entrance of branch b, branch c, branch d, and branch e. ​​In this way, when the lubricant flows out from the second channel 1212, the order in which the lubricant passes is branch c→branch b→branch a and branch d→branch e→branch f. The fourth stopper 129 is provided at the entrance of branch b, branch c, branch d, and branch e, which can play a certain role in suppressing the flow, allowing the lubricant to quickly flow to branch a and branch f which are farther away, so that the time for the lubricant to reach the rolling body circulation channel from different branches is similar. A connecting channel (the number of connecting channels is two) is provided between the branch and the branch oil channel 122. One connecting channel includes a connecting section 1 130, a connecting section 2 131 and a connecting section 3 132. The number of connecting sections 1 130, 131 and 132 is two. Two connecting sections 1 130 are used to connect branches c and d, two connecting sections 2 131 are used to connect branches b and e, and two connecting sections 3 132 are used to connect branches a and f. Based on comprehensive considerations of lubricant fluidity, the present invention sets the width of connecting section 1 130 to be equal to the width of branch c, the width of connecting section 2 131 is set to be equal to the width of branch b, and the width of connecting section 3 132 is set to be equal to the width of branch a. The width of branch b is 1.25 times the width of branch c.

[0050] In one embodiment, felt may be provided on the main oil channel 121, the branch oil channel 122, and the connecting channel. The felt is composed of intertwined fibers, and the capillary action of the fibers can promote the flow of the lubricant. Moreover, under the condition that the amount of lubricant injected is not large, the capillary action of the felt can cause the lubricant to reach the rolling element quickly and evenly.

[0051] like Figures 6 to 9As shown, the linear guide rail of the present invention comprises: the above-mentioned improved retainer 1, track 2, slider 3 and two end covers 4, the retainer 1 is installed between the track 2 and the slider 3, a rolling body circulation channel is formed between the slider 3 and the track 2, a plurality of rolling bodies are arranged in the rolling body circulation channel, and the two end covers 4 are connected to the two ends of the slider 3. When the slider 3 slides on the track 2, the plurality of rolling bodies circulate and roll in the rolling body circulation channel. A positioning column 1301 is arranged on the side plate 13 of the retainer 1, and the positioning column 1301 can be inserted into the corresponding positioning hole on the slider 3, so that there will be no relative offset between the slider 3 and the retainer 1.

[0052] The present invention also provides a rolling body lubrication method, comprising the following steps: lubricant is injected from the lubricant injection hole 11 to flow into the main oil channel 121, the lubricant is buffered and converged in the receiving groove 123 and then flows to the two groups of branch oil channels 122; multiple outlets of the branch oil channels 122 are connected to different positions of the rolling body circulation channel, and the lubricant enters different positions in the rolling body circulation channel to fully lubricate the rolling body.

[0053] Specifically, the lubricant enters the first channel 1211 from the lubricant injection hole 11, and reaches the annular channel 125 after being split at the second block 127. After the annular channel 125 is filled, the lubricant gradually flows to the second channels 1212 on both sides, and then flows to each branch. In this flow process, the multiple blocks can make the lubricant reach the rolling element as evenly as possible. Each branch connects to different positions of the circulation channel, and during the circulation of the rolling element, several rolling elements can be evenly lubricated.

[0054] In summary, the lubrication method for the retaining frame, linear guide rail, and rolling element of the present invention improves the structure of the retaining frame 1. After the lubricant is injected, it can be evenly delivered to the rolling element under the guidance of the main oil channel 121 and the branch oil channel 122. There is no need to increase the injection amount of the lubricant, and the lubricant leakage can be prevented.

[0055] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A retainer, characterized in that: include: a lubricant injection hole (11), and A main board (12), wherein the main board (12) is provided with a main oil channel (121) and two groups of branch oil channels (122), the main oil channel (121) being in communication with the lubricant injection hole (11), and the two groups of branch oil channels (122) being in communication with the main oil channel (121); the main oil channel (121) comprising: a first channel (1211) arranged along the length direction of the main board (12) and a second channel (1212) arranged along the width direction of the main board (12); The main oil channel (121) is provided with a receiving groove (123); the first channel (1211) and the second channel (1212) meet at the receiving groove (123); lubricant flows from the lubricant injection hole (11) into the first channel (1211), converges at the receiving groove (123), and then flows through the second channel (1212) to the two groups of branch oil channels (122); the branch oil channels (122) can transport lubricant to different positions of the rolling body circulation channel to achieve sufficient lubrication of the rolling body; Each group of branch oil passages (122) comprises n branches, each of which is connected to the second passage (1212), and the n branches are connected to different positions of the rolling body circulation passage; with the center line of the second passage (1212) as a reference, the n branches are distributed on both sides of the center line of the second passage (1212), and the n branches extend along the width direction of the main plate (12); the closer the distance to the center line of the second passage (1212), the smaller the width of the branch; the widths of the n branches are B1 to B2, respectively. n The lengths of the n branches are L1 to L n , where L1 / B1=L2 / B2=···=L n / B n ; The length of the branch refers to the distance between the center line of the branch and the center line of the second channel (1212).

2. The retainer according to claim 1, characterized in that: A protrusion (124) is provided in the receiving groove (123), an annular channel (125) is formed between the protrusion (124) and the wall of the receiving groove (123), a plurality of first stoppers (126) are provided in the annular channel (125), and the width of the first stoppers (126) gradually increases in a direction approaching the protrusion (124).

3. The retainer according to claim 2, characterized in that: A second stopper (127) and a third stopper (128) are provided at the opening of the annular channel (125); along a direction approaching the protrusion (124), the width of the second stopper (127) gradually increases, and the width of the third stopper (128) gradually decreases.

4. The retainer according to claim 1, characterized in that: A fourth stopper (129) is provided in the branch circuit.

5. The retainer according to claim 2, characterized in that: The volume of the annular channel (125) is less than or equal to 1.5 times the single injection volume of the lubricant.

6. The retainer according to claim 1, characterized in that: The main oil channel (121) and the two groups of branch oil channels (122) are both provided with felt.

7. A linear guide rail, characterized in that: include: The retaining frame (1), the rail (2), the slider (3) and the two end covers (4) as claimed in any one of claims 1 to 6, wherein the retaining frame (1) is installed between the rail (2) and the slider (3), a rolling body circulation channel is formed between the slider (3) and the rail (2), a plurality of rolling bodies are arranged in the rolling body circulation channel, and the two end covers (4) are connected to both ends of the slider (3).

8. A rolling element lubrication method, characterized in that: Using the retaining frame (1) according to any one of claims 1 to 6, the method comprises the following steps: Lubricant is injected from the lubricant injection hole (11) and flows into the main oil channel (121). The lubricant is buffered and gathered in the receiving groove (123) and then flows into the two groups of branch oil channels (122). The multiple outlets of the branch oil channels (122) are connected to different positions of the rolling body circulation channel. The lubricant enters different positions in the rolling body circulation channel to fully lubricate the rolling body.

9. The rolling element lubrication method according to claim 8, characterized in that: The main oil channel (121) comprises: a first channel (1211) arranged along the length direction of the main plate (12) and a second channel (1212) arranged along the width direction of the main plate (12), the first channel (1211) and the second channel (1212) intersecting at the receiving groove (123), a second stopper (127) being located on the first channel (1211), and a third stopper (128) being located on the second channel (1212).

10. The rolling element lubrication method according to claim 9, characterized in that: The lubricant is input from the first channel (1211), is split by the second stopper (127), enters the containing groove (123), and flows to the second channel (1212), and then flows to the n branches through the second channel (1212).

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