Adjustable cam driving mechanism

Abstract

The invention discloses an adjustable cam driving mechanism, and belongs to the technical field of cam driving mechanisms, the adjustable cam driving mechanism comprises a connecting frame, by arranging a swing rod, when the cam driving mechanism is used for a long time, in order to improve the telescopic length adjusting effect of a driving rod during driving, the swing rod is arranged on the connecting frame; the driving requirements of different states are met, a first rotary knob can be rotated to drive a threaded sliding rod to slide along the inner wall of a sliding groove through rotation of a first threaded rod, sliding of the threaded sliding rod is achieved through connection of a connecting toothed plate, driving of a gear to rotate, rotation of the gear and connection of a connecting shaft, and driving of a swing rod to conduct relative overturning movement; and connecting columns are driven to synchronously slide along the inner walls of arc-shaped grooves and first limiting grooves, the distance between connecting wheels is driven to be adjusted, and under continuous rotation of connecting cams, the contact positions of arc-shaped blocks and the connecting wheels are changed, so that the effect of conveniently adjusting the driving length of a driving rod is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of cam drive mechanisms, and in particular to an adjustable cam drive mechanism. Background Art

[0002] The cam mechanism is a high-pair mechanism composed of three basic components: cam, follower and frame. The cam is a component with a curved profile or groove, generally an active component, performing constant speed rotational motion or reciprocating linear motion. The cam mechanism is widely used in light industry, textile, food, transportation, mechanical transmission and other fields. The cam mechanism is a common motion mechanism, which is a high-pair mechanism composed of cam, follower and frame. When the displacement, speed and acceleration of the follower must strictly change according to a predetermined law, especially when the prime mover performs continuous motion and the follower must perform intermittent motion, it is most convenient to use a cam mechanism. The motion law of the cam follower depends on the contour line of the cam or the shape of the groove. The cam can convert continuous rotational motion into reciprocating linear motion, and can realize complex motion laws.

[0003] After searching, according to the patent network CN107725131A, an adjustable cam drive mechanism. The adjustable cam drive mechanism includes a support frame, an input gear, an intermediate gear and an output gear, the input gear, the intermediate gear and the output gear are all arranged on the support frame, the intermediate gear can be adjusted to be fixed on the support frame, the input gear and / or the output gear can be adjusted to be fixed on the support frame, and the adjustable cam drive mechanism of the invention can adapt to engines of different displacements.

[0004] However, although the existing cam mechanism can be adjusted well when in use, the synchronous adjustment effect of the input shaft rotation speed is not high when the cam mechanism is adjusted well, that is, the synchronization of the cam rotation friction adjustment is not high, so that when the cam mechanism is used, the multi-functional adjustability of the driving distance of the driving rod is not high, and when the cam mechanism is used in daily life, the synchronous shock-absorbing effect of the driving rod is not high, so that when the driving rod is used for a long time, the driving rigidity is large, which affects the subsequent service life of the driving rod, and does not meet people's use needs. For this reason, we propose an adjustable cam driving mechanism. Summary of the invention

[0005] The object of the present invention is to provide an adjustable cam drive mechanism to solve the problems raised in the above-mentioned background technology that the synchronous adjustment effect of the input shaft rotation speed is not high, that is, the synchronization of the cam rotation friction adjustment is not high, and when the cam mechanism is used in daily life, the synchronous shock absorbing effect of the drive rod is not high.

[0006] The present invention is implemented as follows: an adjustable cam driving mechanism comprises a connecting frame, the connecting frame comprises an input shaft, a connecting cam, a connecting block, a driving rod, a connecting groove, an arc block and an adjusting mechanism arranged on the outer wall of the connecting frame, the outer wall of the connecting frame is rotatably connected to the input shaft, the outer wall of the input shaft is fixedly connected to the connecting cam, the outer wall of the connecting frame is slidably connected to the connecting block located on one side of the connecting cam, the outer wall of the connecting block is fixedly connected to the driving rod slidably connected to the outer wall of the connecting frame, a connecting groove is provided at the connecting portion between the outer wall of the connecting frame and the driving rod, and the side wall of the connecting cam is integrally connected to the arc block;

[0007] The adjustment mechanism includes a lifting assembly, a rotating assembly and a sliding assembly;

[0008] The lifting assembly includes a first threaded rod, a first knob, a threaded slide rod, a slide groove and a connecting tooth plate, the outer wall of the connecting frame is rotatably connected to the first threaded rod, one end of the first threaded rod is fixedly connected to the first knob, the outer wall of the first threaded rod is threadedly connected to the threaded slide rod slidably connected to the outer wall of the connecting frame, a slide groove is provided at the connection position between the outer wall of the connecting frame and the threaded slide rod, and the outer wall of the threaded slide rod is fixedly connected to the connecting tooth plate;

[0009] The rotating assembly includes a gear, a connecting shaft and a swing rod, the outer wall of the connecting tooth plate is meshed with a gear rotatably connected to the outer wall of the connecting frame, the rotation center of the gear is fixedly connected to the connecting shaft rotatably connected to the outer wall of the connecting frame, and the outer wall of the connecting shaft is fixedly connected to the swing rod;

[0010] The sliding assembly includes a connecting column, an arc groove, a first limiting groove and a connecting wheel. The outer wall of the swing rod is slidably connected to the connecting column that is slidably connected to the outer wall of the connecting block. The connecting portion between the outer wall of the connecting block and the connecting column is provided with an arc groove. The connecting portion between the outer wall of the swing rod and the connecting column is provided with a first limiting groove. The outer wall of the connecting column is rotatably connected to a connecting wheel that fits with the outer wall of the connecting cam.

[0011] Preferably, the outer wall of the connecting frame is provided with a friction mechanism located on one side of the gear, and the top of the connecting frame is provided with a shock absorbing mechanism located below the driving rod.

[0012] Preferably, the first threaded rod is provided with two groups, the rotation directions of the two groups of the first threaded rod are opposite, the threaded sliding rod and the first threaded rod are arranged in a one-to-one correspondence, and the rotation center of the swing rod is arranged to overlap with the rotation center of the gear through the connecting shaft.

[0013] Preferably, the connecting column slides synchronously along the inner wall of the arc groove and the first limiting groove, and the connecting wheel is arranged on the motion track of the connecting cam and the arc block.

[0014] Preferably, the friction mechanism comprises a connecting rod, a rotating rod, a first adjusting groove, a sliding block, a second adjusting groove, a fixed groove, a telescopic block and a friction pad, the outer wall of the connecting tooth plate is fixedly connected to the connecting rod, the outer wall of the connecting rod is slidably connected to the rotating rod rotatably connected to the outer wall of the connecting frame, the connecting portion between the outer wall of the rotating rod and the connecting rod is provided with a first adjusting groove, the outer wall of the rotating rod is slidably connected to the sliding block, the connecting portion between the outer wall of the rotating rod and the sliding block is provided with a second adjusting groove, the connecting portion between the outer wall of the connecting frame and the sliding block is provided with a fixed groove, the outer wall of the sliding block is fixedly connected to the telescopic block, and the inner wall of the telescopic block is detachably connected to a friction pad located on one side of the input shaft.

[0015] Preferably, two groups of the rotating rods are provided, the rotating directions of the two groups of the rotating rods are opposite, and the positions of the first adjustment slots and the second adjustment slots are equidistantly distributed about the rotation center of the rotating rods.

[0016] Preferably, the outer wall profile of the friction pad is in an arc shape, a connecting Velcro is provided at a contact position between the outer wall of the friction pad and the telescopic block, and a fixing Velcro is provided at a contact position between the inner wall of the telescopic block and the friction pad.

[0017] Preferably, the shock absorbing mechanism includes a second threaded rod, a second knob, a sliding rod, a telescopic slot, a pulling rod, a telescopic plate, a second limiting slot, a shock absorbing damper body, a spring and a fixed plate, the outer wall of the connecting frame is rotatably connected to the second threaded rod, one end of the second threaded rod is fixedly connected to the second knob, the outer wall of the second threaded rod is threadedly connected to the sliding rod slidably connected to the outer wall of the connecting frame, the connecting part of the outer wall of the connecting frame and the sliding rod is provided with a telescopic slot, the outer wall of the sliding rod is rotatably connected to the pulling rod, one end of the pulling rod is rotatably connected to the telescopic plate slidably connected to the outer wall of the connecting frame, the connecting part of the outer wall of the connecting frame and the telescopic plate is provided with a second limiting slot, the outer wall of the telescopic plate is fixedly connected to the shock absorbing damper body, the outer wall of the shock absorbing damper body is sleeved with a spring fixedly connected to the outer wall of the telescopic plate, and one end of the spring is fitted with a fixing plate fixedly connected to the outer wall of the driving rod.

[0018] Preferably, two groups of pull rods are provided, the rotation directions of the two groups of pull rods are opposite, the telescopic plates and the pull rods are arranged in a one-to-one correspondence, and the un-extruded height of the shock-absorbing damper body is adapted to the setting height of the fixed plate.

[0019] The adjustable cam drive mechanism provided by the present invention has the following beneficial effects when used:

[0020] 1. The adjustable cam driving mechanism is provided with a swinging rod. When the cam driving mechanism is used for a long time, in order to improve the effect of adjusting the telescopic length of the driving rod during driving and meet the driving needs of different states, the first knob can be rotated to drive the threaded sliding rod to slide along the inner wall of the sliding groove through the rotation of the first threaded rod. The sliding of the threaded sliding rod drives the gear to rotate through the connection of the connecting tooth plate. The rotation of the gear drives the swinging rod to perform relative flipping movement through the connection of the connecting shaft. At the same time, it drives the connecting column to slide synchronously along the inner walls of the arc groove and the first limit groove, drives the spacing between the connecting wheels to be adjusted, and under the continuous rotation of the connecting cam, the contact position of the arc block and the connecting wheel is changed, so as to achieve the effect of conveniently adjusting the driving length of the driving rod.

[0021] 2. This adjustable cam drive mechanism, by setting a friction pad, when using the spacing adjustment for the two sets of connecting wheels, in order to improve the synchronization of the impact on the input shaft speed and achieve the effect of synchronously slowing down the input shaft speed, when the connecting tooth plate is lifted and lowered, it will drive the connecting rod to perform synchronous lifting and lowering movements, and the connecting rod slides along the inner wall of the first adjusting groove, driving the rotating rod to rotate, and the rotation of the rotating rod drives the sliding block to slide along the inner walls of the second adjusting groove and the fixed groove. At the same time, the sliding of the sliding block drives the friction pad to perform a centering clamping movement on the outer wall of the input shaft through the connection of the telescopic block, thereby improving the friction effect on the input shaft and playing a role in synchronously reducing the input shaft speed.

[0022] 3. This adjustable cam driving mechanism, by setting a telescopic plate, when the driving rod is driven reciprocatingly by the cam driving mechanism, in order to improve the adjustment effect of whether the driving rod is shock-absorbing during operation, when the driving rod needs to be buffered, the second knob can be turned to drive the sliding rod to slide along the inner wall of the telescopic groove through the rotation of the second threaded rod. The sliding of the sliding rod drives the telescopic plate to slide along the inner wall of the second limiting groove through the rotation of the pulling rod. The sliding of the telescopic plate causes the shock-absorbing damper body and the spring to slide to the bottom of the fixed plate, and when the fixed plate is driven downward, the spring and the shock-absorbing damper body are squeezed to play a role in adjusting and buffering the driving rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. As shown in the accompanying drawings, the above and other purposes, features and advantages of the present invention will be clearer. The same reference numerals in all the drawings indicate the same parts. The drawings are not deliberately scaled to the actual size, and the focus is on illustrating the main purpose of the present invention.

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 It is a schematic diagram of the overall rear view structure of the present invention;

[0026] Figure 3 It is a schematic diagram of the overall side view structure of the present invention;

[0027] Figure 4 It is a schematic diagram of the position distribution structure of the swing rod of the present invention;

[0028] Figure 5 It is a schematic diagram of the connection structure between the gear and the connecting shaft of the present invention;

[0029] Figure 6 It is a schematic diagram of the connection structure between the rotating rod and the sliding block of the present invention;

[0030] Figure 7 It is a schematic diagram of the position distribution structure of the fixing plate and the shock absorbing damper body of the present invention.

[0031] Summary of reference numerals: 1. connecting frame; 2. input shaft; 3. connecting cam; 4. connecting block; 5. driving rod; 6. connecting groove; 7. arc block; 8. adjusting mechanism; 801. first threaded rod; 802. first knob; 803. threaded slide rod; 804. slide groove; 805. connecting tooth plate; 806. gear; 807. connecting shaft; 808. swing rod; 809. connecting column; 810. arc groove; 811. first limit groove; 812. connecting wheel; 9. friction mechanism; 901. Connecting rod; 902, rotating rod; 903, first adjusting slot; 904, sliding block; 905, second adjusting slot; 906, fixed slot; 907, telescopic block; 908, friction pad; 10, shock absorbing mechanism; 1001, second threaded rod; 1002, second knob; 1003, sliding rod; 1004, telescopic slot; 1005, pulling rod; 1006, telescopic plate; 1007, second limiting slot; 1008, shock absorbing damper body; 1009, spring; 1010, fixed plate. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0033] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. 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.

[0034] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0035] Furthermore, the terms “first”, “second”, etc. are merely used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0036] For examples, see Figures 1 to 7 The present embodiment provides an adjustable cam driving mechanism, including a connecting frame 1, the connecting frame 1 including an input shaft 2, a connecting cam 3, a connecting block 4, a driving rod 5, a connecting groove 6, an arc block 7 and an adjusting mechanism 8 arranged on the outer wall of the connecting frame 1, the outer wall of the connecting frame 1 is rotatably connected to the input shaft 2, the outer wall of the input shaft 2 is fixedly connected to the connecting cam 3, the outer wall of the connecting frame 1 is slidably connected to the connecting block 4 located on one side of the connecting cam 3, the outer wall of the connecting block 4 is fixedly connected to the driving rod 5 slidably connected to the outer wall of the connecting frame 1, the connecting groove 6 is provided at the connecting portion between the outer wall of the connecting frame 1 and the driving rod 5, and the side wall of the connecting cam 3 is integrally connected to the arc block 7;

[0037] The adjustment mechanism 8 includes a lifting assembly, a rotating assembly and a sliding assembly;

[0038] The lifting assembly includes a first threaded rod 801, a first knob 802, a threaded slide rod 803, a slide groove 804 and a connecting tooth plate 805. The outer wall of the connecting frame 1 is rotatably connected to the first threaded rod 801, one end of the first threaded rod 801 is fixedly connected to the first knob 802, the outer wall of the first threaded rod 801 is threadedly connected to the threaded slide rod 803 that is slidably connected to the outer wall of the connecting frame 1, a slide groove 804 is provided at the connection portion between the outer wall of the connecting frame 1 and the threaded slide rod 803, and the outer wall of the threaded slide rod 803 is fixedly connected to the connecting tooth plate 805;

[0039] The rotating assembly includes a gear 806, a connecting shaft 807 and a swing rod 808. The outer wall of the connecting tooth plate 805 is meshed with the gear 806 which is rotatably connected to the outer wall of the connecting frame 1. The rotation center of the gear 806 is fixedly connected to the connecting shaft 807 which is rotatably connected to the outer wall of the connecting frame 1. The outer wall of the connecting shaft 807 is fixedly connected to the swing rod 808.

[0040] The sliding assembly includes a connecting column 809, an arc groove 810, a first limiting groove 811 and a connecting wheel 812. The outer wall of the swing rod 808 is slidably connected to the connecting column 809 which is slidably connected to the outer wall of the connecting block 4. The connecting portion between the outer wall of the connecting block 4 and the connecting column 809 is provided with an arc groove 810. The connecting portion between the outer wall of the swing rod 808 and the connecting column 809 is provided with a first limiting groove 811. The outer wall of the connecting column 809 is rotatably connected to a connecting wheel 812 which fits with the outer wall of the connecting cam 3.

[0041] Furthermore, the outer wall of the connecting frame 1 is provided with a friction mechanism 9 located on one side of the gear 806, and the top of the connecting frame 1 is provided with a shock absorbing mechanism 10 located below the driving rod 5. This is beneficial for improving the friction effect on the input shaft 2 through the setting of the friction mechanism 9, and plays a role in synchronously reducing the rotation speed of the input shaft 2. It is also beneficial for squeezing the spring 1009 and the shock absorbing damper body 1008 through the setting of the shock absorbing mechanism 10, and plays a role in adjusting and buffering the driving rod 5.

[0042] Furthermore, two groups of first threaded rods 801 are provided, and the rotation directions of the two groups of first threaded rods 801 are opposite. The threaded slide rods 803 and the first threaded rods 801 are arranged in a one-to-one correspondence. The rotation center of the swing rod 808 is arranged to coincide with the rotation center of the gear 806 through the connecting shaft 807. The threaded slide rod 803 forms a sliding structure through the first threaded rod 801 and the slide groove 804, which is beneficial to the rotation of the first threaded rod 801, driving the threaded slide rod 803 to slide along the inner wall of the slide groove 804, thereby driving the gear 806 to rotate conveniently.

[0043] Furthermore, the connecting column 809 slides synchronously along the inner walls of the arc groove 810 and the first limit groove 811, the connecting wheel 812 is set on the movement trajectory of the connecting cam 3 and the arc block 7, and the swing rod 808 forms a rotating structure with the connecting frame 1 through the connecting shaft 807 and the gear 806, which is beneficial to the rotation of the connecting shaft 807. Through the connection of the gear 806, the swing rod 808 is driven to rotate along the outer wall of the connecting frame 1, which plays a role in effectively adjusting the spacing between the connecting columns 809, thereby achieving the effect of conveniently adjusting the driving length of the driving rod 5.

[0044] Furthermore, the friction mechanism 9 includes a connecting rod 901, a rotating rod 902, a first adjusting groove 903, a sliding block 904, a second adjusting groove 905, a fixed groove 906, a telescopic block 907 and a friction pad 908. The outer wall of the connecting tooth plate 805 is fixedly connected to the connecting rod 901, the outer wall of the connecting rod 901 is slidably connected to the rotating rod 902 rotatably connected to the outer wall of the connecting frame 1, the connecting portion between the outer wall of the rotating rod 902 and the connecting rod 901 is provided with a first adjusting groove 903, the outer wall of the rotating rod 902 is slidably connected to the sliding block 904, the connecting portion between the outer wall of the rotating rod 902 and the sliding block 904 is provided with a second adjusting groove 905, the connecting portion between the outer wall of the connecting frame 1 and the sliding block 904 is provided with a fixed groove 906, the outer wall of the sliding block 904 is fixedly connected to the telescopic block 907, and the inner wall of the telescopic block 907 is detachable A friction pad 908 located on one side of the input shaft 2 is connected. By setting the friction pad 908, it is beneficial to improve the synchronization of the impact on the rotation speed of the input shaft 2 when the spacing adjustment is used for the two sets of connecting wheels 812, so as to achieve the effect of synchronously slowing down the rotation speed of the input shaft 2. When the connecting tooth plate 805 is raised and lowered, it will drive the connecting rod 901 to perform synchronous lifting and lowering movements, and through the connecting rod 901, it slides along the inner wall of the first adjustment groove 903, driving the rotating rod 902 to rotate. The rotation of the rotating rod 902 drives the sliding block 904 to slide along the inner walls of the second adjustment groove 905 and the fixed groove 906. At the same time, the sliding of the sliding block 904 drives the friction pad 908 to perform a centering clamping movement on the outer wall of the input shaft 2 through the connection of the telescopic block 907, thereby improving the friction effect on the input shaft 2 and playing a role in synchronously reducing the rotation speed of the input shaft 2.

[0045] Furthermore, two groups of rotating rods 902 are provided, and the rotation directions of the two groups of rotating rods 902 are opposite. The positions of the first adjustment groove 903 and the second adjustment groove 905 are equidistantly distributed about the rotation center of the rotating rod 902. The sliding block 904 forms a sliding structure between the rotating rod 902, the second adjustment groove 905 and the fixed groove 906, which is beneficial to the rotation of the rotating rod 902, driving the sliding block 904 to slide synchronously along the inner walls of the second adjustment groove 905 and the fixed groove 906, thereby driving the friction pad 908 to move conveniently.

[0046] Furthermore, the outer wall contour of the friction pad 908 is arc-shaped, and the contact position between the outer wall of the friction pad 908 and the telescopic block 907 is provided with a connecting Velcro, and the contact position between the inner wall of the telescopic block 907 and the friction pad 908 is provided with a fixed Velcro, which is conducive to the convenient disassembly, assembly and replacement of the friction pad 908.

[0047] Furthermore, the shock absorbing mechanism 10 includes a second threaded rod 1001, a second knob 1002, a sliding rod 1003, a telescopic slot 1004, a pulling rod 1005, a telescopic plate 1006, a second limiting slot 1007, a shock absorbing damper body 1008, a spring 1009 and a fixing plate 1010. The outer wall of the connecting frame 1 is rotatably connected to the second threaded rod 1001, one end of the second threaded rod 1001 is fixedly connected to the second knob 1002, and the outer wall of the second threaded rod 1001 is threadedly connected to the connecting frame 1. The outer wall of the connecting frame 1 is slidably connected to the sliding rod 1003, and the connecting portion of the outer wall of the connecting frame 1 and the sliding rod 1003 is provided with a telescopic groove 1004. The outer wall of the sliding rod 1003 is rotatably connected to a pulling rod 1005, and one end of the pulling rod 1005 is rotatably connected to a telescopic plate 1006 slidably connected to the outer wall of the connecting frame 1. The connecting portion of the outer wall of the connecting frame 1 and the telescopic plate 1006 is provided with a second limiting groove 1007, and the outer wall of the telescopic plate 1006 is fixedly connected to a shock absorbing damper body 1008. The outer wall of the body 1008 is sleeved with a spring 1009 fixedly connected to the outer wall of the telescopic plate 1006, and one end of the spring 1009 is fitted with a fixing plate 1010 fixedly connected to the outer wall of the driving rod 5. By setting the telescopic plate 1006, it is beneficial to drive the driving rod 5 to reciprocate through the cam driving mechanism. In order to improve the adjustment effect of whether the driving rod 5 is damped during operation, when the driving rod 5 needs to be buffered, the second knob 1002 can be rotated to rotate the second threaded rod 1001. The sliding rod 1003 is driven to slide along the inner wall of the telescopic groove 1004. The sliding of the sliding rod 1003 drives the telescopic plate 1006 to slide along the inner wall of the second limit groove 1007 through the rotation of the pulling rod 1005. The sliding of the telescopic plate 1006 causes the shock-absorbing damper body 1008 and the spring 1009 to slide to the bottom of the fixed plate 1010, and when the fixed plate 1010 is driven downward, the spring 1009 and the shock-absorbing damper body 1008 are squeezed, thereby playing a role in adjusting and buffering the driving rod 5.

[0048] Furthermore, two groups of pulling rods 1005 are provided, and the rotation directions of the two groups of pulling rods 1005 are opposite. The telescopic plate 1006 and the pulling rod 1005 are arranged in a one-to-one correspondence. The un-extruded height of the shock-absorbing damper body 1008 is adapted to the setting height of the fixed plate 1010. The pulling rod 1005 forms a rotating structure with the telescopic plate 1006 through the sliding rod 1003 and the telescopic groove 1004, which is beneficial for the sliding rod 1003 to slide along the inner wall of the telescopic groove 1004. Through the connection of the telescopic plate 1006, the pulling rod 1005 is driven to rotate effectively, thereby playing a role in adjusting and buffering the driving rod 5.

[0049] like Figure 1As shown, the adjustable cam driving mechanism, when in use, first, when the cam driving mechanism is used for a long time, in order to improve the effect of adjusting the telescopic length of the driving rod 5 during driving and meet the driving needs of different states, the first knob 802 can be rotated to drive the threaded slide bar 803 to slide along the inner wall of the slide groove 804 through the rotation of the first threaded rod 801, and the sliding of the threaded slide bar 803 drives the gear 806 to rotate through the connection of the connecting tooth plate 805, and the rotation of the gear 806 drives the swing rod 808 to perform relative flipping movement through the connection of the connecting shaft 807, and at the same time, drives the connecting column 809 to slide synchronously along the inner wall of the arc groove 810 and the first limiting groove 811, drives the spacing between the connecting wheels 812 to be adjusted, and under the continuous rotation of the connecting cam 3, the contact position of the arc block 7 and the connecting wheel 812 is changed, so as to achieve the effect of conveniently adjusting the driving length of the driving rod 5;

[0050] Next, when the spacing adjustment is used for the two sets of connecting wheels 812, in order to improve the synchronization of the impact on the rotation speed of the input shaft 2 and achieve the effect of synchronously slowing down the rotation speed of the input shaft 2, when the connecting tooth plate 805 is lifted and lowered, the connecting rod 901 will be driven to perform synchronous lifting and lowering movements, and the connecting rod 901 will slide along the inner wall of the first adjustment groove 903, driving the rotating rod 902 to rotate, and the rotation of the rotating rod 902 will drive the sliding block 904 to slide along the inner walls of the second adjustment groove 905 and the fixed groove 906. At the same time, the sliding of the sliding block 904 drives the friction pad 908 to perform a centering clamping movement on the outer wall of the input shaft 2 through the connection of the telescopic block 907, thereby improving the friction effect on the input shaft 2 and playing the role of synchronously reducing the rotation speed of the input shaft 2.

[0051] Finally, when the driving rod 5 is driven reciprocatingly by the cam driving mechanism, in order to improve the adjustment effect of whether the driving rod 5 is shock-absorbing during operation, when the driving rod 5 needs to be buffered, the second knob 1002 is rotated to drive the sliding rod 1003 to slide along the inner wall of the telescopic groove 1004 through the rotation of the second threaded rod 1001. The sliding of the sliding rod 1003 drives the telescopic plate 1006 to slide along the inner wall of the second limiting groove 1007 through the rotation of the pulling rod 1005. The sliding of the telescopic plate 1006 causes the shock-absorbing damper body 1008 and the spring 1009 to slide to the bottom of the fixed plate 1010, and when the fixed plate 1010 is driven downward, the spring 1009 and the shock-absorbing damper body 1008 are squeezed to play a role in adjusting and buffering the driving rod 5.

[0052] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An adjustable cam drive mechanism, comprising a connecting frame (1), characterized in that: The connecting frame (1) comprises an input shaft (2), a connecting cam (3), a connecting block (4), a driving rod (5), a connecting groove (6), an arc block (7) and an adjusting mechanism (8) arranged on the outer wall of the connecting frame (1); the outer wall of the connecting frame (1) is rotatably connected to the input shaft (2); the outer wall of the input shaft (2) is fixedly connected to the connecting cam (3); the outer wall of the connecting frame (1) is slidably connected to the connecting block (4) located on one side of the connecting cam (3); the outer wall of the connecting block (4) is fixedly connected to the driving rod (5) slidably connected to the outer wall of the connecting frame (1); a connecting groove (6) is provided at a connection portion between the outer wall of the connecting frame (1) and the driving rod (5); and the side wall of the connecting cam (3) is integrally connected to the arc block (7); The adjusting mechanism (8) comprises a lifting assembly, a rotating assembly and a sliding assembly; The lifting assembly comprises a first threaded rod (801), a first knob (802), a threaded slide rod (803), a slide groove (804) and a connecting tooth plate (805); the outer wall of the connecting frame (1) is rotatably connected to the first threaded rod (801); one end of the first threaded rod (801) is fixedly connected to the first knob (802); the outer wall of the first threaded rod (801) is threadedly connected to the threaded slide rod (803) which is slidably connected to the outer wall of the connecting frame (1); a slide groove (804) is provided at the connection portion between the outer wall of the connecting frame (1) and the threaded slide rod (803); and the outer wall of the threaded slide rod (803) is fixedly connected to the connecting tooth plate (805); The rotating assembly comprises a gear (806), a connecting shaft (807) and a swinging rod (808); the outer wall of the connecting tooth plate (805) is meshed with a gear (806) rotatably connected to the outer wall of the connecting frame (1); the rotation center of the gear (806) is fixedly connected to a connecting shaft (807) rotatably connected to the outer wall of the connecting frame (1); and the outer wall of the connecting shaft (807) is fixedly connected to the swinging rod (808); The sliding assembly comprises a connecting column (809), an arcuate groove (810), a first limiting groove (811) and a connecting wheel (812); the outer wall of the swing rod (808) is slidably connected to the connecting column (809) which is slidably connected to the outer wall of the connecting block (4); the connecting portion between the outer wall of the connecting block (4) and the connecting column (809) is provided with an arcuate groove (810); the connecting portion between the outer wall of the swing rod (808) and the connecting column (809) is provided with a first limiting groove (811); the outer wall of the connecting column (809) is rotatably connected to a connecting wheel (812) which fits the outer wall of the connecting cam (3).

2. The adjustable cam drive mechanism according to claim 1, characterized in that: The outer wall of the connecting frame (1) is provided with a friction mechanism (9) located on one side of the gear (806), and the top of the connecting frame (1) is provided with a shock absorbing mechanism (10) located below the driving rod (5).

3. The adjustable cam drive mechanism according to claim 1, characterized in that: The first threaded rod (801) is provided with two groups, and the rotation directions of the two groups of the first threaded rod (801) are opposite. The threaded sliding rod (803) and the first threaded rod (801) are arranged in a one-to-one correspondence, and the rotation center of the swing rod (808) is arranged to overlap with the rotation center of the gear (806) through the connection shaft (807).

4. The adjustable cam drive mechanism according to claim 1, characterized in that: The connecting column (809) slides synchronously along the inner wall of the arc groove (810) and the first limiting groove (811), and the connecting wheel (812) is arranged on the movement track of the connecting cam (3) and the arc block (7).

5. The adjustable cam drive mechanism according to claim 2, characterized in that: The friction mechanism (9) comprises a connecting rod (901), a rotating rod (902), a first adjusting groove (903), a sliding block (904), a second adjusting groove (905), a fixed groove (906), a telescopic block (907) and a friction pad (908); the outer wall of the connecting tooth plate (805) is fixedly connected to the connecting rod (901); the outer wall of the connecting rod (901) is slidably connected to the rotating rod (902) which is rotatably connected to the outer wall of the connecting frame (1); the outer wall of the rotating rod (902) is connected to the connecting rod (901) at a connection position. A first adjustment groove (903) is provided, the outer wall of the rotating rod (902) is slidably connected to a sliding block (904), a second adjustment groove (905) is provided at the connection portion between the outer wall of the rotating rod (902) and the sliding block (904), a fixing groove (906) is provided at the connection portion between the outer wall of the connecting frame (1) and the sliding block (904), a telescopic block (907) is fixedly connected to the outer wall of the sliding block (904), and a friction pad (908) located on one side of the input shaft (2) is detachably connected to the inner wall of the telescopic block (907).

6. The adjustable cam drive mechanism according to claim 5, characterized in that: The rotating rods (902) are provided in two groups, and the rotating directions of the two groups of rotating rods (902) are opposite. The positions of the first adjustment slots (903) and the second adjustment slots (905) are equidistantly distributed about the rotation center of the rotating rods (902).

7. The adjustable cam drive mechanism according to claim 5, characterized in that: The outer wall profile of the friction pad (908) is in an arc shape, and a connecting Velcro is provided at a contact position between the outer wall of the friction pad (908) and the telescopic block (907), and a fixing Velcro is provided at a contact position between the inner wall of the telescopic block (907) and the friction pad (908).

8. The adjustable cam drive mechanism according to claim 2, characterized in that: The shock absorbing mechanism (10) comprises a second threaded rod (1001), a second knob (1002), a sliding rod (1003), a telescopic slot (1004), a pulling rod (1005), a telescopic plate (1006), a second limiting slot (1007), a shock absorbing damper body (1008), a spring (1009) and a fixing plate (1010); the outer wall of the connecting frame (1) is rotatably connected to the second threaded rod (1001); one end of the second threaded rod (1001) is fixedly connected to the second knob (1002); the outer wall of the second threaded rod (1001) is threadedly connected to the sliding rod (1003) which is slidably connected to the outer wall of the connecting frame (1); the outer wall of the connecting frame (1) and the sliding rod (1003) are connected in a slidable manner; A telescopic groove (1004) is provided at the connection position, the outer wall of the sliding rod (1003) is rotatably connected to a pulling rod (1005), one end of the pulling rod (1005) is rotatably connected to a telescopic plate (1006) slidably connected to the outer wall of the connecting frame (1), a second limiting groove (1007) is provided at the connection position between the outer wall of the connecting frame (1) and the telescopic plate (1006), the outer wall of the telescopic plate (1006) is fixedly connected to a shock-absorbing damper body (1008), the outer wall of the shock-absorbing damper body (1008) is sleeved with a spring (1009) fixedly connected to the outer wall of the telescopic plate (1006), and one end of the spring (1009) is fitted with a fixing plate (1010) fixedly connected to the outer wall of the driving rod (5).

9. The adjustable cam drive mechanism according to claim 7, characterized in that: The pulling rods (1005) are provided in two groups, and the rotation directions of the two groups of pulling rods (1005) are opposite. The telescopic plates (1006) and the pulling rods (1005) are provided in a one-to-one correspondence, and the un-extruded height of the shock-absorbing damper body (1008) is adapted to the setting height of the fixed plate (1010).

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