A cam transmission mechanism

Abstract

The present invention discloses a cam transmission mechanism in the field of mechanical transmission technology, comprising: a mounting seat, a driving shaft is provided on the mounting seat, a rotating wheel is provided on the driving shaft, a circular track deviating from the axis line of the rotating wheel is opened on the rotating wheel, a sliding block is provided in the circular track, a first swing arm is provided on the sliding block, a second swing arm is provided on the first swing arm, a connecting rod is provided on the second swing arm, a mounting piece is arranged on the mounting seat, the mounting piece is a telescopic mounting piece, and an oil brushing mechanism inserted in the circular track is provided on the mounting piece; in the present application, when the lubricating oil inside the circular track is small or unevenly distributed, the friction between the mounting sleeve and the circular track will increase, which will cause the mounting sleeve to rotate inside the circular track, open the connecting hole, allow the lubricating oil in the receiving groove to enter the mounting groove, and use a sponge block to contact the inside of the circular track to brush the lubricating oil into the circular track, so as to reduce the friction between the sliding block and the circular track.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical transmission, in particular to a cam transmission mechanism. Background Art

[0002] The cam transmission mechanism is a type of transmission mechanism, which mainly includes a rotating wheel, a circular groove opened on the rotating wheel and deviating from the axis of the rotating wheel, a slider slidably inserted in the circular groove, and a connecting arm connected to the slider. The rotating wheel rotates to make the slider slide in the circular groove, and the connecting arm swings back and forth to perform reciprocating motion.

[0003] In order to reduce the wear of the slider when it moves in the circular groove, lubricating oil is generally applied to the circular groove to reduce the friction between the slider and the circular groove. However, the lubricating oil is generally applied regularly. When there is a large friction between the slider and the circular groove due to lack of lubricating oil or uneven distribution of lubricating oil, it cannot be replenished in time, which will cause the slider to wear. Long-term accumulation will cause deviations in the swing position of the connecting arm. Summary of the invention

[0004] The purpose of the present invention is to provide a cam transmission mechanism to solve the problem mentioned in the above background technology that the lubricating oil is generally applied regularly, and cannot be replenished in time when there is a large friction between the slider and the circular groove due to lack of lubricating oil or uneven distribution of lubricating oil.

[0005] To achieve the above object, the present invention provides the following technical solution: a cam transmission mechanism, comprising: a mounting seat, a driving shaft and a driving mechanism for driving the driving shaft to rotate are arranged on the mounting seat, a rotating wheel is arranged on the rotating wheel, a circular track deviating from the axis of the rotating wheel is opened on the rotating wheel, a slider is arranged in the circular track, a first swing arm is arranged on the slider, a second swing arm is arranged on the first swing arm, and a connecting rod is arranged on the second swing arm, and the cam transmission mechanism further comprises: a mounting member arranged on the mounting seat;

[0006] The mounting piece is a telescopic mounting piece, and an oil brushing mechanism inserted into the annular track is provided on the mounting piece;

[0007] Wherein, the oil brushing mechanism includes a support rod, a mounting sleeve rotatably mounted on the support rod, and a torsion spring mounted between the mounting sleeve and the support rod, a receiving groove for receiving lubricating oil is provided in the mounting sleeve, a mounting groove is provided on the outer wall of the mounting sleeve, a sponge block is provided in the mounting groove, a connecting hole for connecting the mounting groove with the receiving groove is provided on the mounting sleeve, a shielding mechanism for shielding the connecting hole and connected to the support rod is provided in the receiving groove, and when the rotating wheel rotates to cause the mounting sleeve to rotate in the annular track, the mounting sleeve rotates on the support rod, pulls the shielding mechanism, opens the connecting hole, and causes the lubricating oil in the receiving groove to enter the mounting groove and be absorbed by the sponge block, and the sponge block is in contact with the inside of the annular track to brush the lubricating oil into the annular track.

[0008] Preferably, the shielding mechanism comprises a block for shielding the connecting hole, an elastic member provided between the block and the receiving groove, and a pull rope installed between the block and the support rod; the block is slidably installed in the receiving groove;

[0009] There are several groups of the installation grooves and sponge blocks, and the several groups of the installation grooves and sponge blocks are evenly distributed on the outside of the installation sleeve.

[0010] Preferably, an opening is provided in the support rod, a hole connected to the inner cavity of the storage groove is provided in the opening, a liquid storage tank connected to the opening is provided on the support rod, a pressing piece for sealing and dividing the inner cavity of the liquid storage tank and a support spring connected to the pressing piece are slidably provided in the liquid storage tank, and an indicator rod extending to the outside of the liquid storage tank is provided on the pressing piece.

[0011] Preferably, a partition for sealing the opening is slidably provided in the opening, a spring is provided between the partition and the opening, a connecting rope is provided between the partition and the mounting sleeve, an opening is provided on the partition for allowing lubricating oil to pass through the partition, and a plurality of groups of elastic stoppers for sealing the opening are provided in the opening.

[0012] Preferably, the mounting sleeve is provided with a rubber strip which fits the inner wall of the annular track, and a groove is provided in the rubber strip.

[0013] Preferably, a groove connected to the groove is provided on the surface of the rubber strip, a pressure block for squeezing the sponge block is slidably provided in the installation groove, a circulation channel is provided on the inner wall of the installation groove, the outlet end of the circulation channel faces the pressure block, and a connecting groove is provided on the installation sleeve to connect the groove with the circulation channel.

[0014] Preferably, a connecting groove for connecting adjacent installing grooves is provided on the installing sleeve, and a connecting block connected to adjacent sponge blocks is provided in the connecting groove, and the connecting block is made of sponge material.

[0015] Preferably, a connecting piece is provided on the side of the support rod facing the mounting piece, a movable groove is provided on the mounting piece, the connecting piece is slidably inserted into the movable groove, and a spring piece is provided between the connecting piece and the movable groove.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: in the present application, when the lubricating oil inside the annular track is small or unevenly distributed, the friction between the mounting sleeve and the annular track will increase, causing the mounting sleeve to rotate inside the annular track, driving the mounting sleeve to rotate on the support rod, pulling the shielding mechanism, opening the connecting hole, allowing the lubricating oil in the storage groove to enter the mounting groove, and the lubricating oil is absorbed by the sponge block, and the sponge block is in contact with the inside of the annular track to brush the lubricating oil into the annular track, which is used to reduce the friction between the slider and the annular track, so that the lubricating oil can be replenished to the inside of the annular track in time, and the lubricating oil can be evenly brushed into the annular track, so that the wear occurring when the slider moves is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the present invention;

[0018] Figure 2 This is an enlarged schematic diagram of the structure at A of the present invention;

[0019] Figure 3 This is a schematic diagram of the connection structure between the mounting sleeve and the support rod of the present invention;

[0020] Figure 4 This is a schematic diagram of the installation sleeve structure of the present invention;

[0021] Figure 5 This is an enlarged schematic diagram of the structure at B of the present invention;

[0022] Figure 6 It is a schematic diagram of the connection structure between the mounting piece and the support rod of the present invention.

[0023] In the figure: 1. driving shaft; 2. rotating wheel; 3. mounting seat; 4. driving mechanism; 5. circular track; 6. first swing arm; 61. sliding block; 7. second swing arm; 8. connecting rod; 9. mounting member; 10. oil brushing mechanism; 101. mounting sleeve; 102. supporting rod; 103. sponge block; 104. opening; 105. storage groove; 106. stopper; 107. elastic member; 108. pull rope; 109. partition; 110. elastic stopper; 111. connecting groove; 112. connecting block; 113. rubber strip; 114. groove; 115. slot; 116. pressing block; 11. liquid storage tank; 12. pressing member; 13. indicator rod; 14. connecting member; 15. movable groove; 16. spring member. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] Embodiment 1:

[0026] See also Figure 1 A cam transmission mechanism comprises: a mounting seat 3, a driving mechanism 4, a first swing arm 6, a second swing arm 7 and a connecting rod 8; a driving shaft 1 is rotatably provided on the mounting seat 3, and the output end of the driving mechanism 4 is connected to the driving shaft 1 for driving the driving shaft 1 to rotate; a rotating wheel 2 is sleeved on the driving shaft 1, and a circular track 5 deviating from the axis of the rotating wheel 2 is provided on the rotating wheel 2, and a slider 61 is provided in the circular track 5, and the slider 61 can slide inside the circular track 5; the first swing arm 6 and the second swing arm 7 are both rotatably sleeved on the rotating shaft, and the rotating shaft is fixedly installed, one end of the first swing arm 6 is hinged to the slider 61, and the other end is hinged to one end of the second swing arm 7, and the end of the second swing arm 7 away from the first swing arm 6 is hinged to the connecting rod 8; when the driving mechanism 4 is working, the driving shaft 1 will rotate with the rotating wheel 2, so that the slider 61 slides in the circular track 5, so that the first swing arm 6 swings back and forth on the rotating shaft, and swings with the second swing arm 7, driving the connecting rod 8 to move back and forth, and perform reciprocating motion.

[0027] See also Figure 1 and Figure 2 A mounting member 9 is installed on the mounting seat 3, and the mounting member 9 is telescopic and can be extended and retracted to change the length, so that during the rotation of the rotating wheel 2, the mounting member 9 can be extended and retracted so that the oil brushing mechanism 10 is always inserted in the annular track 5; the mounting member 9 is provided with an oil brushing mechanism 10, and the oil brushing mechanism 10 is inserted in the annular track 5 so that the oil brushing mechanism 10 is in contact with the inner wall of the annular track 5.

[0028] See also Figure 2 , Figure 3 and Figure 4 The oil brushing mechanism 10 includes a support rod 102, a mounting sleeve 101 rotatably mounted on the support rod 102, and a torsion spring (used to enable the mounting sleeve 101 to reset after rotation) disposed between the mounting sleeve 101 and the support rod 102; a receiving groove 105 is provided in the mounting sleeve 101, and the receiving groove 105 is filled with lubricating oil; a mounting groove is provided on the outer wall of the mounting sleeve 101, and a sponge block 103 is provided in the mounting groove; a connecting hole is provided on the mounting sleeve 101, and is used to connect the mounting groove with the receiving groove 105; a shielding mechanism is provided in the receiving groove 105.

[0029] Among them, see Figure 4The blocking mechanism includes a block 106 for blocking the connecting hole, an elastic member 107 arranged between the block 106 and the receiving groove 105, and a pull rope 108 installed between the block 106 and the support rod 102 (a guide hole is opened in the receiving groove 105, and the end of the pull rope 108 away from the block 106 passes through the guide hole and is connected to the support rod 102); the block 106 is slidably installed in the receiving groove 105.

[0030] In summary, when the rotating wheel 2 rotates and the connecting rod 8 makes a reciprocating motion, the rotating wheel 2 rotates, causing the installation sleeve 101 to slide in the annular track 5. If the annular track 5 lacks lubricating oil or the lubricating oil is unevenly distributed, the friction between the installation sleeve 101 and the annular track 5 will increase, and the rotation of the rotating wheel 2 will cause the installation sleeve 101 to rotate in the annular track 5, driving the installation sleeve 101 to rotate on the support rod 102, pulling the shielding mechanism (making the pull rope 108 wrap around the outer wall of the support rod 102, pulling the block 106, and moving the block 106 away from the shielding area of ​​the connecting hole), opening the connecting hole; making the lubricating oil in the receiving groove 105 enter the installation groove, and the sponge block 103 absorbs the lubricating oil, The sponge block 103 is in contact with the inside of the annular track 5 to apply lubricating oil to the inside of the annular track 5, so as to reduce the wear of the slider 61; as the lubricating oil is applied to the inside of the annular track 5, the friction between the mounting sleeve 101 and the annular track 5 is reduced, and the mounting sleeve 101 is reset (i.e., rotated in the opposite direction) under the action of the torsion spring, and the pull rope 108 wrapped around the outer wall of the support rod 102 is lowered, so that the tension on the stopper 106 disappears, and the stopper 106 is reset under the action of the elastic member 107, and the connecting hole is sealed again; and when the rotating wheel 2 rotates to make the mounting sleeve 101 slide inside the annular track 5, the sponge block 103 moves inside the annular track 5 to evenly apply the lubricating oil inside the annular track 5.

[0031] In this embodiment, as a further optimized solution, please refer to Figure 3 and Figure 4 There are several groups of mounting grooves and sponge blocks 103, and the several groups of mounting grooves and sponge blocks 103 are evenly distributed on the outside of the mounting sleeve 101; through multiple sponge blocks 103, after the mounting sleeve 101 rotates, the sponge blocks 103 can also contact the inner wall of the annular track 5, which is used to brush the lubricating oil onto the inner wall of the annular track 5.

[0032] In this embodiment, as a further optimized solution, please refer to Figure 4 A connecting groove 111 for connecting adjacent mounting grooves is provided on the mounting sleeve 101, and a connecting block 112 connected to adjacent sponge blocks 103 is provided in the connecting groove 111, and the connecting block 112 is made of sponge material; the sponge blocks 103 are in contact and connected with each other, so that the lubricating oil on each sponge block 103 can be supplemented with each other, and the lubricating oil is applied to the inner wall of the annular track 5.

[0033] In this embodiment, as a further optimized solution, please refer to Figure 2 and Figure 6 A connecting piece 14 is provided on the side of the support rod 102 facing the mounting piece 9, and a movable groove 15 is provided on the mounting piece 9. The connecting piece 14 is slidably inserted into the movable groove 15, and a spring piece 16 is provided between the connecting piece 14 and the movable groove 15; the spring piece 16 is used to provide a pulling force to the connecting piece 14, so that the support rod 102 with the mounting sleeve 101 is closely attached to the inner wall of the annular track 5.

[0034] Embodiment 2:

[0035] For further optimization, see Figure 3 and Figure 4 The support rod 102 is provided with an opening 104, and the opening 104 is provided with a hole connected to the inner cavity of the receiving groove 105. A liquid storage tank 11 (the liquid storage tank 11 is filled with lubricating oil) is installed on the support rod 102, and a liquid outlet is provided on the liquid storage tank 11, and the liquid outlet is connected to the opening 104. The liquid storage tank 11 is provided with a liquid inlet for adding lubricating oil to the inside of the liquid storage tank 11; a pressing member 12 is slidably provided in the liquid storage tank 11, and the pressing member 12 and the liquid storage tank 11 are sealed. A supporting spring is installed between the liquid storage tank 11 and the pressing member 12, and the movement of the pressing member 12 can move the liquid storage tank 11 1 is squeezed into the receiving groove 105, so that the receiving groove 105 can be replenished with lubricating oil in time, and the pressing piece 12 presses the lubricating oil in the storage tank 11, so that the lubricating oil in the storage groove 105 has a certain pressure, ensuring that the lubricating oil can flow out from the connecting hole after the connecting hole is opened; an indicating rod 13 (i.e., a rod with scale lines on it) is installed on the pressing piece 12, and one end of the indicating rod 13 away from the pressing piece 12 extends to the outside of the storage tank 11; by observing the length of the indicating rod 13 exposed outside the storage tank 11, the lubricating oil reserve in the storage tank 11 can be understood.

[0036] In this embodiment, as a further optimized solution, please refer to Figure 4A partition 109 is slidably provided in the opening 104, a spring is provided between the partition 109 and the opening 104, and the partition 109 is used to block the opening 104. The partition 109 is between the hole and the liquid outlet, and a connecting rope is provided between the partition 109 and the mounting sleeve 101; an opening is provided on the partition 109, and the lubricating oil passes through the partition 109 through the opening. A plurality of groups of elastic stoppers 110 made of rubber are provided in the opening, and the elastic stoppers 110 are aligned and on the same surface, and are used to block the opening; when the connecting hole is opened, the lubricating oil in the receiving groove 105 flows out, and when the lubricating oil in the liquid storage tank 11 flows into the receiving groove 105 under the action of the pressing member 12, the liquid storage tank 11 The internal lubricating oil will first enter the opening 104, push the partition 109 to move toward the hole, and at the same time squeeze the elastic stopper 110, causing the elastic stopper 110 to deform and open the opening until the lubricating oil flows into the receiving groove 105; during the movement of the partition 109, the connecting rope will be pulled (when the mounting sleeve 101 does not rotate, the connecting rope is in a relaxed state. After the mounting sleeve 101 rotates, the connecting rope will be pulled to gradually tighten. When the partition 109 moves, the connecting rope will provide a reverse force to the mounting sleeve 101), and a reverse rotation pulling force will be applied to the mounting sleeve 101 to drive the mounting sleeve 101 to rotate in the reverse direction and reset, so as to block the connecting hole.

[0037] Embodiment 3:

[0038] For further optimization, see Figure 4 and Figure 5 A rubber strip 113 is provided on the mounting sleeve 101, and the rubber strip 113 is in contact with the inner wall of the annular track 5, and a groove 114 is provided in the rubber strip 113; the rubber strip 113 is used to block and restrict the mounting sleeve 101, so that the mounting sleeve 101 will not rotate easily, and the lubricating oil will not flow out easily.

[0039] In this embodiment, as a further optimized solution, please refer to Figure 5 A groove 115 is provided on the surface of the rubber strip 113, and the groove 115 is connected to the groove 114 (so that the groove 114 is connected to the outside world). A pressure block 116 is slidably provided in the installation groove for squeezing the sponge block 103. A circulation channel is provided on the inner wall of the installation groove, and the outlet end of the circulation channel faces the pressure block 116. A connecting groove is provided on the installation sleeve 101 for connecting the groove 114 with the circulation channel; when the installation sleeve 101 rotates, the rubber strip 113 will contact the inner wall of the annular track 5, and the rubber strip 113 will be squeezed (the groove 115 of the rubber strip 113 contacts the inner wall of the annular track 5 to cover the groove 115), so that the air inside the groove 114 is blown to the pressure block 116 through the circulation channel, pushing the pressure block 116 to move, and squeezing the sponge block 103, so as to squeeze out the lubricating oil adsorbed in the sponge block 103.

[0040] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A cam transmission mechanism, comprising: A mounting seat (3), wherein a driving shaft (1) and a driving mechanism (4) for driving the driving shaft (1) to rotate are provided on the mounting seat (3), a rotating wheel (2) is provided on the rotating wheel (2), an annular track (5) deviating from the axis of the rotating wheel (2) is provided on the rotating wheel (2), a slider (61) is provided in the annular track (5), a first swing arm (6) is provided on the slider (61), a second swing arm (7) is provided on the first swing arm (6), and a connecting rod (8) is provided on the second swing arm (7), wherein the cam transmission mechanism further comprises: a mounting member (9) provided on the mounting seat (3); The mounting member (9) is a telescopic mounting member, and an oil brushing mechanism (10) inserted into the annular track (5) is provided on the mounting member (9); The oil brushing mechanism (10) comprises a support rod (102), a mounting sleeve (101) rotatably mounted on the support rod (102), and a torsion spring arranged between the mounting sleeve (101) and the support rod (102); a receiving groove (105) for receiving lubricating oil is provided in the mounting sleeve (101); a mounting groove is provided on the outer wall of the mounting sleeve (101); a sponge block (103) is provided in the mounting groove; and a connecting hole is provided on the mounting sleeve (101) for connecting the mounting groove with the receiving groove (105). A shielding mechanism for shielding the connecting hole and connected to the support rod (102) is provided in the receiving groove (105); when the rotating wheel (2) rotates to cause the mounting sleeve (101) to rotate in the annular track (5), the mounting sleeve (101) rotates on the support rod (102), pulling the shielding mechanism to open the connecting hole, so that the lubricating oil in the receiving groove (105) enters the mounting groove and is absorbed by the sponge block (103); the sponge block (103) is in contact with the inside of the annular track (5), and the lubricating oil is applied to the inside of the annular track (5).

2. A cam transmission mechanism according to claim 1, characterized in that: The shielding mechanism comprises a block (106) for shielding the connecting hole, an elastic member (107) provided between the block (106) and the receiving groove (105), and a pull rope (108) installed between the block (106) and the support rod (102); the block (106) is slidably installed in the receiving groove (105); There are several groups of the installation grooves and sponge blocks (103), and the several groups of the installation grooves and sponge blocks (103) are evenly distributed on the outside of the installation sleeve (101).

3. A cam transmission mechanism according to claim 2, characterized in that: The support rod (102) is provided with an opening (104), the opening (104) is provided with a hole communicating with the inner cavity of the storage groove (105), the support rod (102) is provided with a liquid storage box (11) communicating with the opening (104), a pressing piece (12) for sealing and dividing the inner cavity of the liquid storage box (11) and a supporting spring connected to the pressing piece (12) are slidably provided in the liquid storage box (11), and the pressing piece (12) is provided with an indicating rod (13) extending to the outside of the liquid storage box (11).

4. A cam transmission mechanism according to claim 3, characterized in that: A partition (109) for sealing the opening (104) is slidably disposed in the opening (104), a spring is disposed between the partition (109) and the opening (104), a connecting rope is disposed between the partition (109) and the mounting sleeve (101), an opening is disposed on the partition (109) for allowing lubricating oil to pass through the partition (109), and a plurality of groups of elastic stoppers (110) for sealing the opening are disposed in the opening.

5. The cam transmission mechanism according to claim 1, characterized in that: The installation sleeve (101) is provided with a rubber strip (113) which is in contact with the inner wall of the annular track (5), and a groove (114) is provided in the rubber strip (113).

6. A cam transmission mechanism according to claim 5, characterized in that: The surface of the rubber strip (113) is provided with a groove (115) connected to the groove (114); a pressing block (116) for pressing the sponge block (103) is slidably provided in the installation groove; a circulation channel is provided on the inner wall of the installation groove; the outlet end of the circulation channel faces the pressing block (116); and a connecting groove is provided on the installation sleeve (101) to connect the groove (114) with the circulation channel.

7. The cam transmission mechanism according to claim 2, characterized in that: The installation sleeve (101) is provided with a connecting groove (111) for connecting adjacent installation grooves. A connecting block (112) connected to an adjacent sponge block (103) is provided in the connecting groove (111). The connecting block (112) is made of a sponge material.

8. The cam transmission mechanism according to claim 1, characterized in that: A connecting piece (14) is provided on the side of the support rod (102) facing the mounting piece (9), a movable groove (15) is provided on the mounting piece (9), the connecting piece (14) is slidably inserted into the movable groove (15), and a spring piece (16) is provided between the connecting piece (14) and the movable groove (15).

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