Mechanical bottle cap conveying equipment
By integrating a camshaft system and a transmission shaft system into a mechanical bottle cap feeding device, the problems of complex structure and inaccurate conveying of existing devices have been solved, achieving compact and efficient bottle cap conveying and improving the synchronization of the production line and product quality.
Patent Information
- Application Number
- CN202520537280.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-26
- Publication Date
- 2025-12-30
- Estimated Expiration
- 2035-03-26
AI Technical Summary
Existing bottle cap conveying devices have complex structures and numerous parts, resulting in high equipment costs, large space requirements, and an inability to accurately control the frequency of bottle cap conveying to match the rhythm of subsequent production lines, thus affecting product quality and production efficiency.
Design a mechanical bottle cap feeding device that integrates a camshaft system and a transmission shaft system on the same base. Power transmission and motion control are achieved through a gear transmission pair. Precise bottle cap feeding is achieved by matching the outer peripheral trajectory curve of the cap feeding cam with the rotational speed of the transmission shaft system.
The equipment has a compact structure, which reduces the number of parts, improves the accuracy of conveying and production efficiency, and can be precisely synchronized with subsequent production lines to meet the needs of different production rhythms.
Smart Images
Figure CN223737097U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to packing machinery technical field, concretely relates to a mechanical type bottle lid cover equipment. BACKGROUND
[0002] In the production of bottle caps (including round aluminum caps, iron caps, ring-pull aluminum caps, etc.) and related beverage filling and sealing processes, the bottle caps need to be arranged neatly and uniformly with the opening direction facing the same direction to facilitate smooth entry into subsequent production equipment. However, the existing bottle cap conveying device has many drawbacks.
[0003] On the one hand, the structural design of the existing equipment is not reasonable, and the camshaft system and the transmission shaft system are often independently provided with support structures and transmission devices, resulting in a large number of parts, which not only increases the cost of the equipment, but also makes the overall structure of the equipment bulky and complex, occupies more production space, and the complex structure also increases the probability of failure and the difficulty of maintenance.
[0004] On the other hand, the existing device cannot accurately convey the bottle caps to the subsequent equipment at a specific frequency per minute during operation, and it is difficult to keep consistent with the production rhythm of the entire production line. Due to the inability to accurately control the movement of the camshaft and the transmission shaft, the cover feeding action is not accurate, and the bottle caps may deviate in position during the conveying process, the cover feeding interval is inconsistent, etc., which affects the product quality and production efficiency. Moreover, the cover separation frequency of the existing equipment cannot be flexibly matched with the subsequent production frequency, and lacks sufficient adaptability and adjustment ability when facing different production rhythms, which seriously restricts the efficient production. Therefore, it is urgent to develop a new type of equipment with more optimized structure, which can accurately adapt to such working conditions and meet the accurate cover feeding action requirements. SUMMARY
[0005] The utility model aims at making up for the deficiency of prior art, and proposes a mechanical type bottle lid cover equipment. By using the equipment, in the production of bottle caps, filling and sealing or similar production processes, a row of neatly arranged bottle caps with consistent opening direction can be fed into other production equipment one by one at a fixed interval distance, ensuring accurate synchronization with the operation rhythm of the subsequent production line. At the same time, the overall structure of the equipment can be more compact, and the number of components can be less.
[0006] The overall technical scheme of the utility model is as follows:
[0007] The mechanical bottle cap feeding device comprises a base, a camshaft system, a transmission shaft system and a support seat, the camshaft system and the transmission shaft system are installed on the base, the camshaft system comprises a camshaft, a bearing seat one and a camshaft system gear, the camshaft extends upward, a feeding cam is fixedly installed on the shaft extension section, the outer circumferential track surface of the feeding cam is provided with a far rest section and a near rest section, the camshaft system gear is fixedly installed on the lower end of the camshaft, the transmission shaft system comprises a bearing seat two and a transmission shaft, the transmission shaft is supported in the bearing seat two by bearings, the transmission shaft extends upward, a transmission disc is fixedly installed on the shaft extension section, a plurality of negative pressure suction cups are uniformly arranged on the circumference of the transmission disc, a transmission shaft gear is fixedly installed on the lower end of the transmission shaft, the transmission shaft gear and the camshaft system gear are meshed with each other to form a gear transmission pair for power transmission and motion control.
[0008] The support seat is fixed on the top surface of the base, a sliding bearing is fixedly installed in the central hole of the support seat, a push rod is slidingly installed in the sliding bearing, a push plate is arranged at one end of the push rod, the push plate is used to push the bottle cap in the cap feeding channel, a U-shaped protruding part is arranged at the other end of the push rod, a rolling bearing is installed in the U-shaped protruding part, a compression spring is arranged between the U-shaped protruding part and the sliding bearing, the compression spring keeps the pressure on the U-shaped protruding part, so that the rolling bearing tightly abuts against the outer circumferential track surface of the feeding cam; the camshaft system gear drives the feeding cam to rotate, the feeding cam drives the push rod and the push plate to reciprocally slide in the horizontal direction; when the camshaft system gear drives the feeding cam to rotate to the near rest section and tightly abut against the rolling bearing, the push plate is retracted to the initial position closest to the feeding cam and away from the cap feeding channel, when the camshaft system gear drives the feeding cam to rotate to the far rest section and tightly abut against the rolling bearing, the push plate is pushed to the position farthest from the feeding cam to push the bottle cap in the cap feeding channel out.
[0009] Further, M far rest sections and M near rest sections are uniformly distributed on the circumferential track curve of the feeding cam, M≥1, one side of each far rest section is sequentially provided with a cap pushing curve and a near rest section, the other side is sequentially provided with a return curve and a near rest section, the M near rest sections, the cap pushing curve, the far rest section and the return curve are sequentially connected end to end to form the outer circumferential cam track curve of the feeding cam.
[0010] Further, the bearing seat one is fixed on the top surface of the base by screws, the camshaft is supported in the bearing seat one by bearings, the feeding cam is fixed on the upper end of the camshaft by screws, when the camshaft system gear rotates, the camshaft and the feeding cam rotate together.
[0011] Further, the rolling bearing is fixed inside the U-shaped protruding section at the right end of the push rod by a pin shaft, the outer ring of the rolling bearing can rotate freely around the pin shaft, and the outer ring of the rolling bearing is tightly attached to the outer circumferential track surface of the cover feeding cam.
[0012] Further, the device is also provided with a compression cover which fixes the sliding bearing inside the central hole of the support base, the compression spring is arranged between the compression cover and the U-shaped protruding section at the right end of the push rod, the left end surface of the compression spring is tightly pressed against the end surface of the compression cover, and the right end surface of the compression spring is tightly attached to the right end U-shaped protruding section of the push rod, thereby always maintaining the pressure on the push rod to the right side, so that the outer ring of the rolling bearing is tightly attached to the outer circumferential track surface of the cover feeding cam.
[0013] Further, a guide rod is also provided, the right end of the guide rod is fixed with the push rod by a pin shaft and a nut, and the guide rod can slide horizontally with the push rod; the light axis section at the left end of the guide rod is in large gap fit with the through hole below the center of the support base, and the light axis section of the guide rod can freely slide in the through hole of the support base. When the push rod slides left and right, the guide rod restricts the sliding of the push rod to prevent the push rod from rotating around its own axis while sliding.
[0014] The working principle of the device is as follows:
[0015] The device is used in cooperation with the cover inlet channel. The bottle cap enters the push plate from the cover inlet channel above and is held by the limiting block below the cover inlet channel, so that the center of the bottle cap at the lowermost part of the cover inlet channel is at the same horizontal height position as the push plate, the cap surface of the bottle cap faces the push plate, and the inner side surface faces the suction disc of the transmission shaft system.
[0016] When the cover feeding cam and the rolling bearing are in contact at the near rest section, the push plate is at the initial position and does not contact the bottle cap, and the bottle cap in the cover inlet channel can freely fall until it is held by the limiting block below the cover inlet channel.
[0017] When the cover feeding cam and the rolling bearing are in contact at the far rest section, the push plate moves with the push rod to the farthest position from the cover feeding cam, and the bottle cap at the lowermost part of the cover inlet channel is pushed to the farthest position by the push plate. When the bottle cap is at the farthest position, the negative pressure suction disc of the transmission shaft system can just adsorb the inner side surface of the bottle cap, and then the bottle cap is adsorbed by the negative pressure suction disc of the transmission shaft system and starts to rotate with the negative pressure suction disc, and the bottle cap is turned into the subsequent processing procedure.
[0018] The camshaft gear drives the cover feeding cam to rotate, the rolling bearing, the push rod and the guide rod reciprocate horizontally under the action of the spring, the push plate fixed to the left end of the push cover reciprocates horizontally with the push rod, the cover feeding cam contacts the M far rest segments on the circumferential track curve of the cover feeding cam every rotation, and the push rod pushes M times to push the M bottle caps to the negative pressure suction disc of the transmission shaft.
[0019] The parameters of the various components of the device need to meet certain logical relationships, on the one hand, the device can operate normally according to the logical relationships, on the other hand, the adjustment of the parameters and structures according to the logical relationships can make the device adapt to more working conditions:
[0020] The radius of the far rest segment track curve of the cover feeding cam is R1, the radius of the near rest segment track curve is R2, and the cam lift from the near rest segment to the far rest segment is Δ=R1-R2; during the rotation of the cover feeding cam, the push plate reciprocates, and the sliding stroke is Δ=R1-R2; when the push plate slides forward, the distance of the bottle cap at the bottom of the cover feeding channel pushed forward is Δ=R1-R2.
[0021] The height dimension H of the input bottle cap should be less than the lift Δ of the cover feeding cam 10, that is, H<Δ, so that the cover feeding mechanism can perform normal cover feeding action.
[0022] Furthermore, the push cover curve and the return curve in the circumferential track curve of the push cover cam are not completely symmetrical, but have the following characteristics: the push cover curve is gentle, and the return curve is prominent. The advantage of the above design is that when the push cover cam rotates clockwise, the rolling bearing first contacts the push cover curve in each push cover cycle period; during this period, the push plate pushes the bottle cap cover surface part to push the bottle cap forward. In order to prevent the bottle cap from being pushed to the front end position and being unstable with the suction disc, that is, the bottle cap cannot be stably stopped at the end of the push stroke, the push cover curve is intentionally set to be slightly longer in time. In the return curve stage, the push plate is in the empty return stage because the bottle cap has been sucked and turned away by the suction disc, so the return time is set to be slightly shorter, so that the push plate returns to the initial position earlier, so that the next bottle cap in the cover feeding channel can smoothly fall into the push cover initial position (i.e. the front end of the push plate). In the case that the push stroke and the return stroke are the same, the push stroke time is slightly longer, and the return stroke time is slightly shorter, the left curve of the far rest segment is slightly prominent, and the right curve is slightly gentle.
[0023] Compared with the prior art, the beneficial effects brought by the utility model include:
[0024] 1. The utility model discloses a camshaft system and transmission shaft system are concentrated on same base, can also reduce the number of parts: need not set up independent support structure, transmission device etc. for camshaft system and transmission shaft system respectively, make the overall structure of equipment more compact, and the component is less.
[0025] 2. The utility model discloses transmission shaft gear and camshaft system gear interlock, constitute gear transmission pair, be used for realizing power transmission and motion control, through accurate control camshaft and transmission shaft's movement, can realize accurate control to production process, improve product quality and production efficiency.
[0026] 3. The utility model discloses can realize the mechanical type of cap (include circular bottle cap, ring pull bottle cap) of bottle cap, divide cap action, already arranged in a row and the cap mouth direction is consistent with the bottle cap of a certain interval distance input transmission shaft system or other production equipment.
[0027] 4. The utility model discloses can through the outer peripheral surface trajectory curve of sending cap cam and transmission shaft system rotation speed's matching, adopt mechanical drive to divide cap, action is accurate, and the cap frequency of dividing can be accurate with the production frequency of subsequent accurate matching. DRAWINGS
[0028] Figure 1 It is bottle cap sending cap equipment structure schematic diagram, wherein (a) is the front view, (b) is the plan view;
[0029] Figure 2 It is bottle cap sending cap equipment local structure schematic diagram, wherein (a) is the front view, (b) is the plan view;
[0030] Figure 3 It is cam structure schematic diagram;
[0031] Figure 4 It is bottle cap sending cap equipment when sending cap cam and ball bearing in the state schematic diagram of near rest section contact, wherein (a) is the front view, (b) is the plan view;
[0032] Figure 5 It is bottle cap sending cap equipment when sending cap cam and ball bearing in the state schematic diagram of far rest section contact, wherein (a) is the front view, (b) is the plan view.
[0033] Wherein: 10 - cover cam; 11 - push rod; 12 - support seat; 13 - base; 14 - camshaft gear; 16 - guide rod; 17 - push plate; 18 - sliding bearing; 19 - gland; 20 - compression spring; 21 - rolling bearing; 22 - camshaft; 101 - far rest segment; 102 - near rest segment; 103 - push cover curve; 104 - return curve; 30 - cover channel; 31 - bottle cap; 40 - transmission shaft; 41 - negative pressure suction disc, 42 - transmission shaft gear, 43 - bearing seat two, 44 - transmission shaft. DETAILED DESCRIPTION
[0034] The utility model is further described below by the drawings and examples, but not as the basis for limiting the utility model.
[0035] Example one, see Figures 1-5 The utility model discloses a mechanical bottle cap cover equipment, including base 13, camshaft, transmission shaft 40 and support seat 12, the base 13 is installed with camshaft and transmission shaft 40, and the camshaft includes camshaft 22, bearing seat one and camshaft gear 14, and the camshaft 22 is stretched out upward, and the shaft extension segment is fixedly installed with cover cam 10, and the outer circumferential track surface of cover cam 10 is equipped with far rest segment 101 and near rest segment 102;Camshaft 22 lower end fixed installation camshaft gear 14, transmission shaft 40 includes bearing seat two and transmission shaft, and transmission shaft is supported in bearing seat two with bearing, and the transmission shaft is stretched out upward, and the shaft extension segment is fixedly installed with transmission disc, and the transmission disc circumferentially evenly sets up a plurality of negative pressure suction disc, and the lower end of transmission shaft is fixedly installed with transmission shaft gear, and transmission shaft gear and camshaft gear are mutually engaged, and constitute gear transmission pair, are used for realizing power transmission and motion control;The central hole of support seat 12 is fixedly installed with sliding bearing 18, and sliding bearing 18 is slidably installed with push rod 11 in the middle, and push rod 11 one end is equipped with push plate 17, and push plate 17 is used to push the bottle cap in cover channel, and the other end is equipped with U-shaped protruding segment, and U-shaped protruding segment is installed with rolling bearing 21 in the inside, and U-shaped protruding segment is equipped with compression spring 20 between sliding bearing 18, and compression spring 20 keeps the pressure of U-shaped protruding segment, makes rolling bearing 21 tightly stick to the outer circumferential track surface of cover cam 10;Camshaft gear 14 drives cover cam 10 to rotate, and cover cam 10 drives push rod 11 and push plate 17 to make reciprocating sliding in horizontal direction;When camshaft gear 14 drives cover cam 10 to rotate to near rest segment and tightly stick to rolling bearing 21, push plate 17 is retracted to the initial position closest to cover cam 10, and is far away from cover channel, when camshaft gear 14 drives cover cam 10 to rotate to far rest segment and tightly stick to rolling bearing 21, push plate 17 is pushed to the farthest place from cover cam 10, and the bottle cap in cover channel is pushed out.
[0036] M segments of the far rest section 101 and M segments of the near rest section 102 are evenly distributed on the circumferential track curve of the cover feeding cam 10, M>=1, one side of each segment of the far rest section 101 is in turn the cover pushing curve 103 and the near rest section 102, the other side is in turn the return curve 104 and the near rest section 102, the M segments of the near rest section 102, the cover pushing curve 103, the far rest section 101 and the return curve 104 are connected in turn, and constitute the outer circumferential cam track curve of the cover feeding cam 10.
[0037] The bearing seat is fixed on the top surface of the base 13 by screws, the cam shaft system is further provided with a cam shaft 22, and the cover feeding cam 10 is fixed on the upper end of the cam shaft 22 by screws. When the cam shaft gear 14 rotates, the cam shaft 22 and the cover feeding cam 10 are driven to rotate together.
[0038] In the embodiment two, the specific structure of the device of the utility model is seen from Figures 1-2 The outer ring of the rolling bearing 21 can rotate freely around the pin shaft, and the outer ring of the rolling bearing 21 is tightly attached to the outer circumferential track curve of the cover feeding cam 10. The rest of the structure is the same as that in the embodiment one.
[0039] In the embodiment three, the specific structure of the device of the utility model is seen from Figures 1-2 The sliding bearing 18 is fixed in the central hole of the support seat 12 by the gland 19, the compression spring 20 is arranged between the gland 19 and the U-shaped protruding section at the right end of the pushing rod 11, the left end surface of the compression spring 20 is tightly pressed against the end surface of the gland 19, the right end surface of the compression spring 20 is tightly attached to the U-shaped protruding section at the right end of the pushing rod 10, and the compression spring 20 always maintains the pressure on the pushing rod 11 to the right side, so that the outer ring of the rolling bearing 21 is tightly attached to the outer circumferential track curve of the cover feeding cam 10.
[0040] In the embodiment four, the specific structure of the device of the utility model is seen from Figures 1-2 The right end of the guide rod 16 is fixed with the pushing rod 11 by the pin shaft and the nut, and the guide rod 16 can slide horizontally with the pushing rod 11; the light axis section at the left end of the guide rod 16 is in large gap cooperation with the through hole below the center of the support seat 12, and the light axis section of the guide rod 16 can slide freely in the through hole of the support seat 12. When the pushing rod 11 slides left and right, the guide rod 16 restricts the sliding of the pushing rod 11, preventing the pushing rod 11 from rotating around its own axis while sliding.
[0041] In the embodiment four, the specific structure of the device of the utility model is seen from Figures 4-5The working principle of this utility model device is as follows: This device cooperates with the cap feeding channel 30. The bottle cap enters the position directly in front of the push plate 17 through the upper cap feeding channel 30 and is supported by the limiting block below the cap feeding channel 30, so that the center of the lowest bottle cap 31 in the cap feeding channel 30 is at the same horizontal height as the push plate 17, with the cap surface of the bottle cap 31 facing the push plate 17 and the inner side facing the negative pressure suction cup 41 of the transmission shaft system 40.
[0042] See Figure 3 , Figure 4 When the cap feeding cam 10 contacts the rolling bearing 21 near the rest section, the push plate 17 is in the initial position and does not contact the bottle cap 31. The bottle cap 31 in the cap feeding channel 30 can fall freely until it is supported by the limiting block below the cap feeding channel 30.
[0043] See Figure 3 , Figure 5 When the cap feeding cam 10 contacts the rolling bearing 21 at its far rest point, the push plate 17 moves along with the push rod 11 to the furthest point from the cap feeding cam 10. The lowermost cap 31 in the cap feeding channel 30 is pushed to its furthest position by the push plate 17. When the cap 31 is at its furthest position, a negative pressure suction cup 41 of the transmission shaft system 40 can just hold the inner side of the cap 31. Subsequently, the cap 31 is held by the negative pressure suction cup 41 of the transmission shaft system 40 and begins to rotate along with the negative pressure suction cup 41. The cap 31 is then transferred to the subsequent processing steps.
[0044] The parameters of each component of this utility model equipment must conform to certain logical relationships. Adjusting the parameters and structure according to these logical relationships can enable the equipment to adapt to more working conditions.
[0045] See Figures 4-5 For each rotation of the cap-feeding cam 10, the rolling bearing 21 contacts the M far rest segments on the circumferential trajectory curve of the cap-feeding cam 10, and the push rod 11 pushes forward M times, pushing the M bottle caps 31 toward the negative pressure suction cup 41 of the transmission shaft system 40.
[0046] See Figure 3 The radius of the trajectory curve of the far rest segment 101 of the cover-feeding cam 10 is R1, and the radius of the trajectory curve of the near rest segment 102 is R2. The cam lift Δ from the near rest segment 102 to the far rest segment 101 is Δ = R1 - R2; see also Figure 4 , 5 During the rotation of the cap feeding cam 10, the push plate 17 slides back and forth, and its sliding stroke is Δ=R1-R2; when the push plate 17 slides forward, it pushes the bottom cap 31 of the cap feeding channel 30 forward by a distance of Δ=R1-R2.
[0047] The bottle cap height dimension H inputted should be not greater than the lift Δ of the cap feeding cam 10, that is, H < Δ is required so that the cap feeding mechanism can perform normal cap feeding action.
[0048] It should be noted that all the above figures show that the power source of the camshaft system and the transmission shaft system is a gear, and the utility model can also be a wheel, a sprocket, a friction wheel or other modes, as long as the rotation speed of the camshaft system and the transmission is met, and no further description is made.
[0049] The above is only a preferred example of the utility model, and is not any form and substantial limitation of the utility model. Any equivalent changes and modifications of the above examples according to the utility model are also considered as the protection scope of the utility model.
Claims
1. A mechanical bottle cap feeding apparatus, characterized by: The application relates to a bottle cap feeding device, which comprises a base, a camshaft system, a transmission shaft system and a supporting seat, the camshaft system and the transmission shaft system are installed on the base, the camshaft system comprises a camshaft, a bearing seat I and a camshaft system gear, the camshaft extends upwards, a cover feeding cam is fixedly installed on the shaft extending section, the outer circumferential track surface of the cover feeding cam is provided with a far rest section and a near rest section; the camshaft system gear is fixedly installed on the lower end of the camshaft, the transmission shaft system comprises a bearing seat II and a transmission shaft, the transmission shaft is supported by bearings in the bearing seat II, the transmission shaft extends upwards, a transmission disc is fixedly installed on the shaft extending section, a plurality of negative pressure suction discs are uniformly arranged on the circumference of the transmission disc, a transmission shaft gear is fixedly installed on the lower end of the transmission shaft, the transmission shaft gear and the camshaft system gear are mutually engaged to form a gear transmission pair, which is used for realizing power transmission and motion control. The supporting seat is fixed on the top surface of the base, a sliding bearing is fixedly installed in the central hole of the supporting seat, a pushing rod is slidingly installed in the sliding bearing, a push plate is arranged at one end of the pushing rod, the push plate is used for pushing the bottle cap in a cap feeding channel, a U-shaped protruding section is arranged at the other end of the pushing rod, a rolling bearing is installed in the U-shaped protruding section, and a compression spring is arranged between the U-shaped protruding section and the sliding bearing.
2. The mechanical cap feeding apparatus according to claim 1, characterized in that: M far rest sections and M near rest sections are uniformly distributed on the circumferential track curve of the cover feeding cam, M is greater than or equal to 1, one side of each far rest section is sequentially provided with a cap pushing curve and a near rest section, the other side is sequentially provided with a return curve and a near rest section, the M near rest sections, the cap pushing curve, the far rest section and the return curve are sequentially connected, and the outer circumferential track curve of the cover feeding cam is formed.
3. The mechanical cap feeding apparatus according to claim 1, characterized in that: The camshaft system bearing seat is fixed on the upper surface of the top plate of the base by screws, the camshaft system further comprises a camshaft, the cover feeding cam is fixed on the upper end of the camshaft by screws.
4. The mechanical cap feeding apparatus according to claim 1, characterized in that: The rolling bearing is fixed in the U-shaped protruding section at the right end of the pushing rod by a pin shaft, the outer ring of the rolling bearing can freely rotate around the pin shaft, and the outer ring of the rolling bearing is tightly attached to the outer circumferential track curve of the cover feeding cam.
5. The mechanical cap feeding apparatus according to claim 1, characterized in that: A gland is further arranged, the gland fixes the sliding bearing in the central hole of the supporting seat, the compression spring is arranged between the gland and the U-shaped protruding section at the right end of the pushing rod, the left end surface of the compression spring is tightly pressed against the end surface of the gland, the right end surface of the compression spring is tightly attached to the U-shaped protruding section at the right end of the pushing rod, the compression spring always keeps pressure on the right side of the pushing rod, and the outer ring of the rolling bearing is tightly attached to the outer circumferential track curve of the cover feeding cam.
6. The mechanical cap feeding apparatus according to claim 1, characterized in that: A guide rod is further arranged, the right end of the guide rod is fixed with the pushing rod by a pin shaft and a nut, the guide rod can slide horizontally with the pushing rod, the light shaft section at the left end of the guide rod is loosely matched with the through hole below the center of the supporting seat, and the light shaft section of the guide rod can freely slide in the through hole of the supporting seat.
7. The mechanical cap feeding apparatus according to claim 2, characterized in that: The bottle cap feeding device is matched with the cap feeding channel of the previous process. The bottle cap enters the position in front of the push plate from the cap feeding channel above, is supported by the limiting block below the cap feeding channel, so that the center of the bottle cap at the lowermost position of the cap feeding channel is at the same horizontal height position as the push plate, the cap surface of the bottle cap faces the push plate, and the inner side faces the suction disc of the transmission shaft system. When the cap feeding cam contacts the rolling bearing at the near rest section, the push plate is at the initial position and does not contact the bottle cap, and the bottle cap in the cap feeding channel can freely fall until being supported by the limiting block below the cap feeding channel. When the cap feeding cam contacts the rolling bearing at the far rest section, the push plate moves to the farthest position from the cap feeding cam along with the push rod, and the bottle cap at the lowermost position of the cap feeding channel is pushed to the farthest position by the push plate. When the bottle cap is at the farthest position, one negative pressure suction disc of the transmission shaft system can just adsorb the inner side of the bottle cap, and then the bottle cap is adsorbed by the negative pressure suction disc of the transmission shaft system and starts to rotate together with the negative pressure suction disc. The bottle cap is turned into the subsequent processing process. The push rod pushes M bottle caps to the negative pressure suction disc of the transmission shaft system forward M times per rotation of the cap feeding cam.