CN217569321U - Oiling equipment - Google Patents

Abstract

The utility model belongs to the technical field of grease spraying and discloses an oil injection device, wherein a support frame of the oil injection device is used for fixedly mounting a workpiece to be injected with oil, and a cam is rotationally arranged on the support frame; the two oil injection mechanisms are respectively provided with an oil injection head which is used for injecting grease, the oil injection mechanisms can slide relative to the support frame along the direction and have an oil injection position and a separation position, when the oil injection mechanism is at the oil injection position, the oil injection heads can be inserted into the holes to be injected so as to inject the grease to the holes to be injected, and when the oil injection mechanism is at the separation position, the oil injection heads can be separated from the workpieces to be injected so as to facilitate the disassembly and assembly of the workpieces to be injected; first oiling mechanism and the equal butt of second oiling mechanism in the outer wall of cam for move under the drive of cam, thereby can drive two oiling mechanisms motion simultaneously through the cam, and then treat the oil filler point to two and spray the grease, accomplish the oiling operation, operation process is simple.

Description

Oiling equipment

Technical Field

The utility model relates to a grease spraying technical field especially relates to an oiling equipment.

Background

After some workpieces are finished, grease needs to be injected into the holes of the workpieces so that the grease covers the inner walls of the holes.

The mode that the oiling head stretches into treating the oil filler point is generally adopted to downthehole oiling, but its problem that exists is that, treating the oil filler point on treating the oiling work piece may be a plurality ofly, and the central line direction of treating the oil filler point of difference is different, leads to its equipment of need adjusting in proper order when the oiling to treat the oil filler point oiling to one by one, the operation is complicated. And if two oil injection heads are controlled simultaneously to finish oil injection, the depth of the different oil injection heads extending into the hole to be injected is not easy to control, so that the oil injection is not uniform.

Therefore, there is a need for an oil injection device to solve the above problems.

SUMMERY OF THE UTILITY MODEL

According to the utility model discloses an aspect, the utility model provides an oiling equipment to when solving two oiling head oiling of simultaneous control among the prior art, different oiling heads stretch into the difficult problem of control of the degree of depth of treating the oil filler point.

In order to achieve the purpose, the utility model adopts the following technical proposal:

the oil injection equipment is used for injecting grease into a first hole to be injected and a second hole to be injected of a workpiece to be injected, wherein the center line of the first hole to be injected is parallel to a first direction, and the center line of the second hole to be injected is parallel to a second direction;

the method comprises the following steps:

the supporting frame is used for fixedly mounting the workpiece to be oiled;

the cam is rotationally arranged on the supporting frame;

the first oiling mechanism is abutted against the outer wall of the cam and is provided with a first oiling head used for injecting grease, the first oiling mechanism can slide relative to the support frame along a first direction and is provided with a first oiling position and a first separation position, when the first oiling mechanism is positioned at the first oiling position, the first oiling head can be inserted into the first hole to be oiled, and when the first oiling mechanism is positioned at the first separation position, the first oiling head can be separated from the workpiece to be oiled;

and the second oiling mechanism is abutted against the outer wall of the cam and is provided with a second oiling head, the second oiling head is used for injecting grease, the second oiling mechanism can slide relative to the support frame along a second direction and has a second oiling position and a second separation position, when the second oiling mechanism is positioned at the second oiling position, the second oiling head can be inserted into the second hole to be oiled, and when the second oiling mechanism is positioned at the second separation position, the second oiling head can be separated from the workpiece to be oiled.

In a preferred embodiment of the fueling equipment, a contact point between the first fueling means and the cam and a contact point between the second fueling means and the cam are symmetrically distributed along a rotation center of the cam, and an outer wall of the cam is symmetrically distributed with respect to the rotation center of the cam.

As a preferable mode of the oil injecting device, the outer wall of the cam has two top dead centers and two bottom dead centers, when the first oil injecting mechanism abuts against one of the top dead centers of the cam, the first oil injecting mechanism is located at a first separated position, and the second oil injecting mechanism abuts against the other top dead center and is located at a second separated position; when the first oil injection mechanism is abutted against one of the lower dead centers of the cam, the first oil injection mechanism is positioned at a first oil injection position, and the second oil injection mechanism is abutted against the other lower dead center and positioned at a second oil injection position.

As a preferable mode of the oil injecting device, a distance between a rotation center of the cam and an outer wall of the cam is gradually reduced from the top dead center to the bottom dead center in a rotation direction of the cam; the distance between the center of rotation of the cam and the outer wall of the cam is gradually increased from the bottom dead center to the top dead center in the direction of rotation of the cam.

As a preferable scheme of the oil injection equipment, the oil injection equipment further comprises a first elastic piece used for always driving the first oil injection mechanism to abut against the outer wall of the cam, and/or further comprises a second elastic piece used for always driving the second oil injection mechanism to abut against the outer wall of the cam.

As a preferable mode of the oiling device, the first oiling mechanism includes a first oiling mechanism body and a first roller provided to the first oiling mechanism body, and the first roller is in rolling contact with an outer wall of the cam.

As a preferable mode of the oiling device, the second oiling mechanism includes a second oiling mechanism body and a second roller provided in the second oiling mechanism body, and the second roller is in rolling contact with an outer wall of the cam.

As a preferable mode of the oil injecting device, the first direction and the second direction form an included angle, the rotation center of the cam is perpendicular to the first direction, the second rollers are provided in plurality, and the second rollers are sequentially arranged along the extending direction parallel to the rotation center of the cam.

As a preferable scheme of the oil injection device, the first oil injection head is provided with a plurality of first oil injection holes, and the plurality of first oil injection holes are distributed at intervals in the first oil injection head along the circumferential direction of the first oil injection head; and the second oil injection head is provided with a plurality of second oil injection holes, and the second oil injection holes are distributed on the second oil injection head at intervals along the circumferential direction of the second oil injection head.

As a preferable scheme of the oil injection equipment, the oil injection equipment further comprises a driving piece arranged on the supporting frame, and the driving piece is used for driving the cam to rotate.

The utility model has the advantages that:

the utility model provides an oiling equipment, this oiling equipment's support frame are used for fixed mounting to treat the oiling work piece, and the cam rotates and sets up in the support frame, and first oiling mechanism and the equal butt of second oiling mechanism are in the outer wall of cam for move under the drive of cam. First oiling mechanism is provided with first oiling head, and first oiling head is used for injecting the grease, and first oiling mechanism can slide for the support frame along the first direction and have first oiling position and first separation position, and when first oiling position of first oiling mechanism, first oiling head can insert the first oil filler point of treating to spray the grease to the first oil filler point of treating, when first oiling mechanism is located first separation position, first oiling head can with treat the separation of oiling work piece, thereby be convenient for treat the dismouting of oiling work piece. The actions of injecting grease and separating the grease from the workpiece to be oiled by the second oiling mechanism are similar to those of the first oiling mechanism. First oiling mechanism and the equal butt of second oiling mechanism in the outer wall of cam to can drive two oiling mechanisms motion simultaneously through the cam, and then treat oil filler point jet grease to two, accomplish the oiling operation, operation process is simple, and in addition, the accessible changes the shape and the profile of cam outer wall with stroke and the motion trail of adjusting two oiling heads, and then the different oiling heads of control stretch into the degree of depth of treating the oil filler point.

Drawings

Fig. 1 is a schematic view of the overall structure of an oil injection device in an embodiment of the present invention;

FIG. 2 is an enlarged view at A in FIG. 1;

fig. 3 is a schematic view of the overall structure of the oil injection device in the embodiment of the present invention;

FIG. 4 is an enlarged view at B in FIG. 3;

FIG. 5 is a schematic diagram of the internal structure of the oil injection device in the embodiment of the present invention;

fig. 6 is a schematic structural diagram of a cam in an embodiment of the present invention.

In the figure:

100. a workpiece to be oiled; 101. a first hole to be oiled; 102. a second hole to be filled;

1. a support frame;

2. a cam; 21. a top dead center; 22. a lower dead center;

3. a first oil injection mechanism; 31. a first oil injection head; 311. a first oil filler hole; 32. a first oiling mechanism body; 33. a first roller;

4. a second oiling mechanism; 41. a second oil injection head; 411. a second oil filler hole; 42. a second oiling mechanism body; 43. a second roller;

5. a first elastic member;

6. a second elastic member;

7. a drive member;

8. a sensor.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures associated with the present invention are shown in the drawings, not all of them.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used in the orientation or positional relationship shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

After some workpieces are machined, grease needs to be injected into holes of the workpieces, so that the grease covers the inner walls of the holes, however, a plurality of holes to be injected in one workpiece to be injected with the grease may be provided, and the directions of central lines of different holes to be injected with the grease are different, so that the device needs to be sequentially adjusted during oil injection, and the oil is injected into the holes to be injected one by one, which is complex to operate. And if two oil injection heads are controlled simultaneously to finish oil injection, the depth of the different oil injection heads extending into the hole to be injected is not easy to control, so that the oil injection is not uniform.

To above-mentioned problem, this embodiment provides an oiling equipment to when solving two oiling head oil fillings of simultaneous control among the prior art, different oiling heads stretch into the not wayward problem of the degree of depth of treating the oil filler point, can be used to grease spraying technical field.

Fig. 1 is a schematic view showing an overall structure of an oiling device in an embodiment of the present invention; FIG. 2 is an enlarged view at A in FIG. 1; fig. 3 shows a schematic diagram of the overall structure of the oiling device in the embodiment of the present invention; FIG. 4 is an enlarged view at B in FIG. 3; fig. 5 shows the internal structure schematic diagram of oiling equipment in the embodiment of the present invention. Referring to fig. 1 to 5, the oil injecting device is used for injecting grease into a first hole to be injected 101 and a second hole to be injected 102 of a workpiece 100 to be injected, wherein a center line of the first hole to be injected 101 is parallel to a first direction, and a center line of the second hole to be injected 102 is parallel to a second direction, in this embodiment, the first direction and the second direction form an included angle, that is, the first hole to be injected 101 and the second hole to be injected 102 are formed along different directions.

With continued reference to fig. 1-5, the oil injection apparatus includes a support frame 1, a cam 2, a first oil injection mechanism 3, and a second oil injection mechanism 4. The support frame 1 is used for fixedly mounting a workpiece 100 to be oiled; the cam 2 is rotationally arranged on the support frame 1; the first oil injection mechanism 3 and the second oil injection mechanism 4 are both abutted to the outer wall of the cam 2 and are driven by the cam 2 to move. The first oil injection mechanism 3 is provided with a first oil injection head 31, the first oil injection head 31 is used for injecting grease, the first oil injection mechanism 3 can slide relative to the support frame 1 along a first direction and has a first oil injection position and a first separation position, when the first oil injection mechanism 3 is located at the first oil injection position, the first oil injection head 31 can be inserted into a first hole to be injected 101, so that the grease is injected to the first hole to be injected 101, and when the first oil injection mechanism 3 is located at the first separation position, the first oil injection head 31 can be separated from the workpiece 100 to be injected, so that the workpiece 100 to be injected can be conveniently disassembled and assembled. Similarly to the first oiling mechanism 3, the second oiling mechanism 4 is provided with a second oiling head 41, the second oiling head 41 is used for injecting grease, the second oiling mechanism 4 can slide relative to the support frame 1 along the second direction and has a second oiling position and a second separation position, when the second oiling mechanism 4 is located at the second oiling position, the second oiling head 41 can be inserted into the second hole to be oiled 102, so as to inject grease to the first hole to be oiled 101, and when the second oiling mechanism 4 is located at the second separation position, the second oiling head 41 can be separated from the workpiece 100 to be oiled, so as to facilitate the assembly and disassembly of the workpiece 100 to be oiled. Because first oiling mechanism 3 and the equal butt of second oiling mechanism 4 in the outer wall of cam 2 to can drive two oiling mechanism motions simultaneously through cam 2, and then treat the oil filler point to two and spout the grease, accomplish the oiling operation, operation process is simple. In addition, the stroke and the motion trail of the two oil filling heads can be adjusted by changing the shape and the contour of the outer wall of the cam 2, and the depth of the different oil filling heads extending into the hole to be filled is further controlled.

With continued reference to fig. 1-5, the oil injection device further comprises a first elastic member 5 for always driving the first oil injection mechanism 3 against the outer wall of the cam 2, and a second elastic member 6 for always driving the second oil injection mechanism 4 against the outer wall of the cam 2. So that the oil injection mechanism can move towards the direction far away from the rotating center of the cam 2 under the driving of the cam 2 and simultaneously abut against the outer wall of the cam 2 under the driving of the elastic piece. Optionally, the first elastic element 5 is disposed between the first oil injection mechanism 3 and the supporting frame 1 along the first direction, and the second elastic element 6 is disposed between the second oil injection mechanism 4 and the supporting frame 1 along the second direction.

With continued reference to fig. 1-5, the contact point of the first oil injection mechanism 3 and the cam 2 and the contact point of the second oil injection mechanism 4 and the cam 2 are symmetrically distributed along the rotation center of the cam 2, and the outer wall of the cam 2 is symmetrical relative to the rotation center of the cam 2, so that the strokes of the first oil injection mechanism 3 and the second oil injection mechanism 4 during the movement process are consistent, and the control and the adjustment are convenient.

Fig. 6 shows a schematic structural diagram of the cam in the embodiment of the present invention, referring to fig. 1 to 6, specifically, the outer wall of the cam 2 has two top dead centers 21 and two bottom dead centers 22, when the first oil injection mechanism 3 abuts on one of the top dead centers 21 of the cam 2, the first oil injection mechanism 3 is located at a first separation position, and the second oil injection mechanism 4 abuts on the other top dead center 21 and is located at a second separation position, at this time, the first oil injection mechanism 3 and the second oil injection mechanism 4 and the workpiece 100 to be injected are both in a separated state, so as to facilitate the dismounting and mounting of the workpiece 100 to be injected. When the first oil injection mechanism 3 abuts against one of the bottom dead centers 22 of the cam 2, the first oil injection mechanism 3 is located at the first oil injection position, and the second oil injection mechanism 4 abuts against the other bottom dead center 22 and is located at the second oil injection position, so that oil injection of the first oil injection mechanism 3 and the second oil injection mechanism 4 can be controlled simultaneously.

With continued reference to fig. 1 to 6, the distance from the center of rotation of the cam 2 to the outer wall of the cam 2 gradually decreases from the top dead center 21 to the bottom dead center 22 in the direction of rotation of the cam 2; the distance between the center of rotation of the cam 2 and the outer wall of the cam 2 gradually increases from the bottom dead center 22 to the top dead center 21 in the direction of rotation of the cam 2. The contact position of the cam 2 and the oil injection mechanism changes from the top dead center 21 to the bottom dead center 22, and changes from the bottom dead center 22 to the top dead center 21, that is, the oil injection mechanism slides smoothly during the process of moving from the separated position to the oil injection position and moving from the oil injection position to the separated position.

The working process of the oiling device in the embodiment is described below with reference to fig. 1 to 6:

in the present embodiment, the cam 2 is rotated in a clockwise direction in fig. 6, that is, the change of the contact point of the outer wall of the cam 2 with the corresponding oiling mechanism is changed in a counterclockwise direction. Taking the first oiling mechanism 3 as an example, in the initial state, the first oiling mechanism 3 is located at the first separation position and abuts against the top dead center 21 on the left side of the cam 2 in fig. 6. As the cam 2 rotates, the contact position of the first oiling mechanism 3 with the cam 2 is gradually changed to the bottom dead center 22 located at the lower left, so that the first oiling mechanism 3 is located at the first oiling position, and at this time, the first oiling head 31 is controlled to start the grease injection. Meanwhile, the cam 2 continues to rotate, the first oil injection mechanism 3 moves from the first oil injection position to the first separated position again, and the first oil injection head 31 is controlled to stop injecting the grease during the movement. That is to say, starting when the first oil injection head 31 is located at the first oil injection position, and injecting the grease in the process that the first oil injection head 31 gradually exits from the first to-be-injected hole 101, the grease sprayed on the inner wall of the first to-be-injected hole 101 is not carried out along with the exit of the first oil injection head 31, so that the grease can be uniformly sprayed on the inner wall of the first to-be-injected hole 101 along the first direction, and meanwhile, the oil accumulation phenomenon is avoided. Optionally, in this embodiment, an included angle between the top dead center 21 and the bottom dead center 22 adjacent to the top dead center in the counterclockwise direction is smaller than an included angle between the bottom dead center 22 and the top dead center 21 adjacent to the top dead center in the counterclockwise direction, so that when the first oil injection head 31 injects grease, the movement speed of the first oil injection mechanism 3 is slower, and the grease injection process is stable. Specifically, in the present embodiment, the included angle between the top dead center 21 and the bottom dead center 22 adjacent to the top dead center in the counterclockwise direction is 48 °, and the included angle between the bottom dead center 22 and the top dead center 21 adjacent to the bottom dead center in the counterclockwise direction is 132 °. After the first oil injection mechanism 3 is in contact with the bottom dead center 22, the first oil injection head 31 starts injecting the grease, after the cam 2 rotates by 92 degrees, the first oil injection head 31 stops injecting the grease, and after the cam 2 continues to rotate by 40 degrees, the first oil injection head contacts with the next top dead center 21. As an alternative, in other embodiments, the first filling head 31 may be controlled to spray oil during the movement from the first separated position toward the first filling position, that is, to spray grease during the gradual extension of the first filling head 31 into the first to-be-filled hole 101, and the oil spraying is stopped when the first filling head 31 is located at the first filling position, but with respect to the embodiment, there may be a case where grease adhering to the inner wall of the first to-be-filled hole 101 is carried out by the first filling head 31.

With continued reference to fig. 1-5, the first oiling mechanism 3 includes a first oiling mechanism body 32 and a first roller 33 provided to the first oiling mechanism body 32, and the first roller 33 is in rolling contact with the outer wall of the cam 2, thereby reducing the friction between the first oiling mechanism 3 and the cam 2. Similar to the above structure, the second oiling mechanism 4 includes the second oiling mechanism body 42 and the second roller 43 provided to the second oiling mechanism body 42, and the second roller 43 is in rolling contact with the outer wall of the cam 2, thereby reducing the friction force between the second oiling mechanism 4 and the cam 2.

With continued reference to fig. 1-5, in the present embodiment, the first direction forms an angle with the second direction, and the rotation center of the cam 2 is perpendicular to the first direction, so that the first oil injection mechanism 3 only moves along the first direction, that is, does not move toward the extending direction of the rotation center of the cam 2, but the second oil injection mechanism 4 moves along the second direction, that is, the second oil injection mechanism 4 moves toward the extending direction of the rotation center of the cam 2 while moving along the first direction, resulting in the extending direction of the rotation center of the cam 2, and the contact position of the second oil injection mechanism 4 and the cam 2 changes. To accommodate this change, the second roller 43 may be a roller having a long axial length, or the second roller 43 may be provided in plural, and the plural second rollers 43 may be arranged in sequence in the extending direction parallel to the rotation center of the cam 2, and the cam 2 may be always in rolling contact with at least one second roller 43 during the movement of the second oiling mechanism 4.

With continued reference to fig. 1 to 5, the first oil filling head 31 is provided with a plurality of first oil filling holes 311, and the plurality of first oil filling holes 311 are distributed at intervals in the first oil filling head 31 along the circumferential direction of the first oil filling head 31, so that the grease injection of the first oil filling head 31 is more uniform along the circumferential direction. The second oil injection head 41 is provided with a plurality of second oil injection holes 411, and the plurality of second oil injection holes 411 are distributed at the second oil injection head 41 along the circumferential direction of the second oil injection head 41 at intervals, and the effect is not repeated.

With continued reference to fig. 1-5, the oil injection device further includes a driving member 7 disposed on the supporting frame 1, wherein the driving member 7 is used for driving the cam 2 to rotate. Optionally, a control device is further provided, and the control device is connected to the driving member 7 and is used for controlling the oil filling head to start or stop injecting the grease, and when the driving member 7 drives the cam 2 to rotate by a certain angle, the control device controls the oil filling head to start or stop injecting the grease, so as to achieve automatic spraying of the grease.

With continued reference to fig. 1-5, the oil injection device further includes a sensor 8, and the sensor 8 is configured to detect whether the type of the workpiece 100 to be injected is correct, so as to prevent the grease from being sprayed abnormally due to a wrong type. Specifically, the data plate of the workpiece 100 to be oiled may be detected for judgment. Optionally, the sensor 8 is connected to the control device and configured to send a detection result to the control device, and the control device processes the detection result, controls the driving member 7 to stop working and sends an alarm signal when the type of the workpiece 100 to be oiled is abnormal.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, rearrangements and substitutions will now occur to those skilled in the art without departing from the scope of the invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement or improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (10)

1. The oil injection device is used for injecting grease into a first hole (101) to be injected and a second hole (102) to be injected of a workpiece (100) to be injected, wherein the center line of the first hole (101) to be injected is parallel to a first direction, and the center line of the second hole (102) to be injected is parallel to a second direction;

it is characterized by comprising:

the support frame (1) is used for fixedly mounting the workpiece (100) to be oiled;

the cam (2) is rotatably arranged on the support frame (1);

the first oil injection mechanism (3) is abutted to the outer wall of the cam (2) and is provided with a first oil injection head (31), the first oil injection head (31) is used for injecting grease, the first oil injection mechanism (3) can slide relative to the support frame (1) along a first direction and has a first oil injection position and a first separation position, when the first oil injection mechanism (3) is located at the first oil injection position, the first oil injection head (31) can be inserted into the first hole to be injected (101), and when the first oil injection mechanism (3) is located at the first separation position, the first oil injection head (31) can be separated from the workpiece to be injected (100);

the second oil injection mechanism (4) is abutted to the outer wall of the cam (2) and is provided with a second oil injection head (41), the second oil injection head (41) is used for injecting grease, the second oil injection mechanism (4) can slide relative to the support frame (1) along a second direction and has a second oil injection position and a second separation position, when the second oil injection mechanism (4) is located at the second oil injection position, the second oil injection head (41) can be inserted into the second hole to be injected (102), and when the second oil injection mechanism (4) is located at the second separation position, the second oil injection head (41) can be separated from the workpiece to be injected (100).

2. The oiling device according to claim 1, characterized in that the points of abutment of the first oiling mechanism (3) with the cam (2) and of abutment of the second oiling mechanism (4) with the cam (2) are distributed symmetrically along the center of rotation of the cam (2), the outer wall of the cam (2) being centred symmetrically with respect to the center of rotation of the cam (2).

3. The oiling apparatus according to claim 2, characterized in that the outer wall of the cam (2) has two top dead centers (21) and two bottom dead centers (22), when the first oiling mechanism (3) abuts against one of the top dead centers (21) of the cam (2), the first oiling mechanism (3) is in a first separated position and the second oiling mechanism (4) abuts against the other top dead center (21) and is in a second separated position; when the first oil injection mechanism (3) is abutted against one of the lower dead centers (22) of the cam (2), the first oil injection mechanism (3) is located at a first oil injection position, and the second oil injection mechanism (4) is abutted against the other lower dead center (22) and located at a second oil injection position.

4. The oiling device according to claim 3, characterized in that the distance of the center of rotation of the cam (2) from the top dead center (21) to the bottom dead center (22) decreases progressively in the direction of rotation of the cam (2); the distance between the rotating center of the cam (2) and the outer wall of the cam (2) is gradually increased from the bottom dead center (22) to the top dead center (21) along the rotating direction of the cam (2).

5. The oiling device according to claim 1, characterized in that it comprises a first elastic element (5) for driving the first oiling mechanism (3) against the outer wall of the cam (2) at all times and/or a second elastic element (6) for driving the second oiling mechanism (4) against the outer wall of the cam (2) at all times.

6. The oiling device according to any of claims 1 to 5, wherein the first oiling mechanism (3) comprises a first oiling mechanism body (32) and a first roller (33) arranged on the first oiling mechanism body (32), and the first roller (33) is in rolling contact with the outer wall of the cam (2).

7. The oiling device according to any of claims 1 to 5, wherein the second oiling mechanism (4) comprises a second oiling mechanism body (42) and a second roller (43) arranged on the second oiling mechanism body (42), and the second roller (43) is in rolling contact with the outer wall of the cam (2).

8. The oiling apparatus according to claim 7, wherein the first direction is angled with respect to the second direction, the rotation center of the cam (2) is perpendicular to the first direction, the second rollers (43) are provided in plurality, and the plurality of second rollers (43) are arranged in sequence along an extension direction parallel to the rotation center of the cam (2).

9. The oil injection device according to any one of claims 1 to 5, wherein the first oil injection head (31) is provided with a plurality of first oil injection holes (311), and the plurality of first oil injection holes (311) are distributed on the first oil injection head (31) at intervals along the circumferential direction of the first oil injection head (31); a plurality of second oil filler holes (411) are formed in the second oil filling head (41), and the second oil filler holes (411) are distributed on the second oil filling head (41) at intervals along the circumferential direction of the second oil filling head (41).

10. The oil injection device according to any one of claims 1 to 5, further comprising a driving member (7) arranged on the support frame (1), wherein the driving member (7) is used for driving the cam (2) to rotate.

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