A double-nail head nailing box machine transmission mechanism capable of quickly switching between synchronization and separation modes

Abstract

The application relates to a double-nail-head carton nailing machine transmission mechanism capable of quickly switching between synchronous and separation modes, and relates to the technical field of carton nailing equipment. The double-nail-head carton nailing machine transmission mechanism comprises a carton nailing machine, an upper nail head mechanism and a lower nail head mechanism arranged on the carton nailing machine, and the upper nail head mechanism and the lower nail head mechanism are both connected with a transmission mechanism. The transmission mechanism comprises an upper nail head eccentric wheel, the upper nail head eccentric wheel is coaxially fixedly connected with an input shaft of the upper nail head mechanism, and the transmission mechanism comprises a lower nail head eccentric wheel, the lower nail head eccentric wheel is coaxially fixedly connected with an input shaft of the lower nail head mechanism. The application has the effects of simple structure, low cost and quick mode switching.

Description

Technical Field

[0001] This application relates to the technical field of carton stapling equipment, and in particular to a transmission mechanism for a double-head stapling machine that can quickly switch between synchronous and separation modes. Background Technology

[0002] Double-piece stapling machines are key equipment in the post-forming process of cardboard boxes, closing the box lids with staples. To improve production efficiency and adaptability, modern stapling machines are usually equipped with two staple heads, one for the top and one for the bottom, allowing for simultaneous stapling of both the top and bottom lids.

[0003] However, in actual production, there are often process requirements that only require nailing one side of the box cover (i.e., a single-piece nail box). In existing technologies, the switching between synchronous and separable modes of the two nail heads is mostly achieved in the following two ways: one is through a complex electronic control system and electromagnetic clutch, which is costly and complicated to maintain; the other is through manually disassembling transmission connecting parts (such as belts and couplings), which is cumbersome and time-consuming, and seriously affects production efficiency.

[0004] Therefore, there is an urgent need for a mechanical transmission solution that is simple in structure, low in cost, and can achieve rapid mode switching. Summary of the Invention

[0005] To address the shortcomings of the existing technology, this application provides a transmission mechanism for a double-head nailing machine that can quickly switch between synchronous and discrete modes.

[0006] This application provides a transmission mechanism for a double-head nailing machine that can quickly switch between synchronous and discrete modes, employing the following technical solution:

[0007] A transmission mechanism for a double-head nailing machine that can quickly switch between synchronous and discrete modes, including a nailing machine;

[0008] An upper nailing head mechanism and a lower nailing head mechanism are provided on the nailing machine. Both the upper nailing head mechanism and the lower nailing head mechanism are connected to a transmission mechanism, which includes:

[0009] The upper nail head eccentric wheel is coaxially and fixedly connected to the input shaft of the upper nail head mechanism;

[0010] The lower nail head eccentric wheel is coaxially and fixedly connected to the input shaft of the lower nail head mechanism;

[0011] A connecting assembly is rotatably mounted to the eccentric shaft of the upper nail head eccentric wheel and to the eccentric shaft of the lower nail head eccentric wheel.

[0012] By connecting components, the power transmission and disconnection between the upper and lower nail head mechanisms are realized, thereby achieving the synchronous and separate working modes of the double-nail-head nailing machine. This results in a mechanical transmission solution that is simple in structure, low in cost, and can achieve rapid mode switching.

[0013] Optionally, the eccentricity of the upper nail head eccentric wheel and the eccentricity of the lower nail head eccentric wheel are equal.

[0014] The equal eccentricity design ensures that the upper and lower staple head mechanisms have identical push-out / retract distances, movement speeds, and action amplitudes in synchronous mode. This guarantees a high degree of consistency in the staple depth and staple foot formation of the upper and lower lids of the carton, preventing situations where the upper lid is stapled too deeply and the lower lid is stapled too shallowly, or vice versa. This ensures the consistency of the synchronous staple process from the structural source, improving the staple quality and aesthetics of the finished carton.

[0015] Optionally, the connection component includes:

[0016] The first bearing, the inner ring of the first bearing is fixedly mounted on the eccentric shaft of the upper nail head eccentric wheel;

[0017] A first connecting rod, one end of which is detachably and fixedly connected to the outer ring of the first bearing;

[0018] The second bearing, the inner ring of which is fixedly mounted on the eccentric shaft of the lower nail head eccentric wheel;

[0019] The second connecting rod has one end that is detachably and fixedly connected to the outer ring of the second bearing.

[0020] The connecting rod is a structure in which two round rods are coaxially and rotatably mounted. One end of the connecting rod is threadedly connected to the end of the first connecting rod away from the upper nail head eccentric wheel, and the other end of the connecting rod is threadedly connected to the end of the second connecting rod away from the lower nail head eccentric wheel.

[0021] This component solves the problems of transmission wear resistance and motion conversion through bearings, and solves the problems of power coupling and length adjustment through the threaded connection between the connecting rod and the connecting rod, ultimately achieving seamless switching between synchronous integration and independent separation of the two nail heads.

[0022] Optionally, the sum of the adjustment lengths of the threaded connections between the connecting rod and the first connecting rod and the second connecting rod is not less than twice the eccentricity of the upper nail head eccentric wheel.

[0023] The eccentricity adjustment length, which is twice the length of the eccentricity, corresponds to a full phase difference adjustment range from 0° synchronization to 180° reversal of the upper and lower eccentric wheels: when the connecting rod is adjusted to its shortest length, the phases of the upper and lower eccentric wheels are completely aligned, and the two nail heads nail synchronously; when the connecting rod is adjusted to its longest length, the phases of the upper and lower eccentric wheels are completely opposite, and the two nail heads nail alternately. This adjustment range covers all process scenarios for carton nailing.

[0024] Optionally, both the first connecting rod and the second connecting rod are provided with positioning devices; the positioning devices include:

[0025] The mounting slots are respectively formed on the outer ring sidewalls of the first bearing and the second bearing;

[0026] A positioning rod is fixedly installed on the first connecting rod and the second connecting rod respectively, and the positioning rod can slide within the mounting groove.

[0027] The positioning rod is fixed on the connecting rod and slidably embedded in the mounting groove of the bearing outer ring. The mounting groove provides strict circumferential limit for the positioning rod, effectively restricting the relative rotation between the connecting rod and the bearing outer ring. This allows the torque transmitted by the eccentric wheel through the bearing to be efficiently transmitted to the connecting rod, ensuring that the power transmission path from the eccentric wheel to the connecting rod and then to the connecting rod is without deviation or loss, and ensuring the consistency of movement of the upper and lower nail head mechanisms in the synchronous nail box mode.

[0028] Optionally, both the first connecting rod and the second connecting rod are threaded with fastening screws, and the bottom end of the fastening screws can abut against the outer wall of the first bearing and the second bearing, respectively.

[0029] After loosening the fastening screws, the connecting rod can smoothly slide in the preset direction to achieve separation. Before tightening the screws, it can quickly return to the precise transmission position, which greatly improves the operational efficiency of switching between synchronous and separation modes and avoids switching failures or equipment malfunctions caused by misalignment of parts during operation.

[0030] Optionally, both the first connecting rod and the second connecting rod have scale lines on the end where they are threaded to the connecting rod.

[0031] The scale lines provide a quantitative reference for adjusting the phase difference of the dual nail heads, accurately adapting to diverse nailing processes.

[0032] Optionally, the input shaft of the upper nail head mechanism is connected to a drive device.

[0033] Optionally, both the first connecting rod and the second connecting rod have a locking nut threaded onto one end near the connecting rod, and the rotation direction of the locking nut is opposite to the rotation direction of the connecting rod.

[0034] The locking nut rotates in the opposite direction to the threads of the connecting rod and the connecting rod. After tightening, the thread engagement forces of the locking nut and the connecting rod, and the thread engagement forces of the connecting rod and the connecting rod, will form a reverse thread preload force. The two restrain each other and form a mechanical self-locking mechanism. Even under alternating torque, the threaded connection will not rotate relative to each other, thus eliminating the loosening problem from the structural root and ensuring the tightness of the threaded connection.

[0035] Optionally, wear-resistant pads are fixedly installed at the connection positions of the first connecting rod and the first bearing, and at the connection positions of the second connecting rod and the second bearing.

[0036] Wear-resistant gaskets have a certain elastic deformation capacity, which can effectively absorb the vibration and impact during equipment operation, alleviate the impact of vibration on the loosening of fastening screws, and fill the small gaps in the mating parts through their own elastic preload, so that the connection between the connecting rod and the bearing always remains tight, avoiding circumferential slippage caused by vibration, ensuring the stability of power transmission, and reducing the nailing accuracy deviation caused by loose connection.

[0037] In summary, this application includes at least one of the following beneficial technical effects:

[0038] 1. Since both ends of the connecting rod are threaded to the first and second connecting rods, rotating the connecting rod can change its effective total length. A slight change in the connecting rod length alters the relative oscillation angle of the upper and lower eccentric wheels during transmission, thereby fine-tuning the nailing sequence (phase difference) of the upper and lower nail heads and significantly improving the equipment's process adaptability.

[0039] 2. The equal eccentricity design ensures that the upper and lower staple head mechanisms have identical push / retract distances, movement speeds, and action amplitudes in synchronous mode. This guarantees a high degree of consistency in the staple depth and staple foot formation of the upper and lower lids of the carton, avoiding situations where the upper lid is stapled too deeply and the lower lid is stapled too shallowly, or vice versa. This ensures the consistency of the synchronous staple process from the structural source, improving the staple quality and aesthetics of the finished carton.

[0040] 3. When the connecting rod is adjusted to its shortest length, the upper and lower eccentric wheels are in perfect phase, and the two nail heads nail synchronously; when the connecting rod is adjusted to its longest length, the upper and lower eccentric wheels are in completely opposite phase, and the two nail heads nail alternately. This adjustment range covers all process scenarios for carton nailing.

[0041] 4. The connecting components solve the problems of transmission wear resistance and motion conversion through bearings, and solve the problems of power coupling and length adjustment through the threaded connection between the connecting rod and the connecting rod, ultimately achieving seamless switching between synchronous integration and independent separation of the two nail heads.

[0042] 5. After loosening the fastening screws, the connecting rod can smoothly slide in the preset direction to achieve separation. Before tightening the screws, it can quickly return to the precise transmission position, which greatly improves the operation efficiency of switching between synchronous and separation modes and avoids switching failure or equipment failure caused by misalignment of parts during operation. Attached Figure Description

[0043] Figure 1 This is a structural schematic diagram of an embodiment of this application;

[0044] Figure 2 This is a structural diagram illustrating the connection component according to an embodiment of this application;

[0045] Figure 3 This is a structural cross-sectional view of an embodiment of this application;

[0046] Figure 4 This is an embodiment of the present application. Figure 3 Enlarged view of point A;

[0047] Figure 5 This is an embodiment of the present application. Figure 1 Enlarged view of point B.

[0048] Explanation of reference numerals in the attached figures:

[0049] 1. Nailer; 11. Upper nail head mechanism; 12. Lower nail head mechanism; 21. Upper nail head eccentric wheel; 22. Lower nail head eccentric wheel; 31. First bearing; 32. First connecting rod; 33. Second bearing; 34. Second connecting rod; 35. Connecting rod; 4. Positioning device; 41. Mounting slot; 42. Positioning rod; 5. Fastening screw; 6. Locking nut. Detailed Implementation

[0050] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0051] This application discloses a transmission mechanism for a dual-head nailing machine that can quickly switch between synchronous and discrete modes. (Refer to...) Figure 1 and Figure 2 The dual-head nailing machine transmission mechanism, capable of quickly switching between synchronous and discrete modes, includes a nailing machine 1 and an upper nailing head mechanism 11 and a lower nailing head mechanism 12 mounted on the nailing machine 1. Both the upper nailing head mechanism 11 and the lower nailing head mechanism 12 are connected to a transmission mechanism. The transmission mechanism includes an upper nailing head eccentric wheel 21 and a lower nailing head eccentric wheel 22. The upper nailing head eccentric wheel 21 is coaxially and fixedly connected to the input shaft of the upper nailing head mechanism 11, and the lower nailing head eccentric wheel 22 is coaxially and fixedly connected to the input shaft of the lower nailing head mechanism 12. A connecting assembly is provided between the upper nailing head eccentric wheel 21 and the lower nailing head eccentric wheel 22. The connecting assembly is rotatably connected to the eccentric shaft of the upper nailing head eccentric wheel 21 and the eccentric shaft of the lower nailing head eccentric wheel 22. A drive device is connected to the input shaft of the upper nailing head mechanism 11.

[0052] In operation, the drive unit inputs power to the input shaft of the upper nail head mechanism 11, enabling it to nail the nail box. Simultaneously, it drives the upper nail head eccentric wheel 21 to rotate, which in turn drives the lower nail head eccentric wheel 22 to rotate via the connecting assembly, achieving synchronous nailing of the upper and lower nail head mechanisms 11 and 12. At the same time, the connecting assembly can quickly disconnect the upper and lower nail head eccentric wheels 21 and 22, separating the upper and lower nail head mechanisms 11 and 12.

[0053] Reference Figure 3 and Figure 4 The connecting assembly includes a first bearing 31 and a second bearing 33. The inner ring of the first bearing 31 is fixedly mounted on the eccentric shaft of the upper nail head eccentric wheel 21, and the outer ring of the first bearing 31 is detachably and fixedly mounted on the first connecting rod 32. The inner ring of the second bearing 33 is fixedly mounted on the eccentric shaft of the lower nail head eccentric wheel 22, and the outer ring of the second bearing 33 is detachably and fixedly mounted on the second connecting rod 34. One end of the first connecting rod 32 away from the upper nail head eccentric wheel 21 is threadedly connected to one end of the connecting rod 35. One end of the second connecting rod 34 away from the upper nail head eccentric wheel 21 is threadedly connected to the other end of the connecting rod 35. The connecting rod 35 is a structure in which two sections of round rod are coaxially rotatably connected.

[0054] The intermediate connecting rod 35, via a threaded connection, rigidly connects the first connecting rod 32 and the second connecting rod 34 into a single unit. When the drive device rotates the upper nail head mechanism 11 and the upper nail head eccentric wheel 21, the power is mechanically transmitted to the lower nail head eccentric wheel 22 via the path of the first connecting rod 32 → connecting rod 35 → second connecting rod 34. This drives the lower nail head mechanism 12 to maintain a completely synchronized motion rhythm with the upper nail head mechanism 11, achieving synchronous nailing. Since both ends of the connecting rod 35 are threaded to the first connecting rod 32 and the second connecting rod 34, rotating the connecting rod 35 changes its effective total length. A slight change in the length of the connecting rod 35 alters the relative oscillation angle of the upper and lower eccentric wheels during transmission, thereby fine-tuning the nailing sequence of the upper and lower nail heads. Using bearings directly between the eccentric shaft and the connecting rod transforms the sliding friction between the eccentric shaft and the connecting rod into rolling friction within the bearing, significantly reducing motion resistance, protecting the surface of the eccentric shaft, and significantly improving the wear resistance and service life of the transmission mechanism. The threaded connection of connecting rod 35 and the presence of bearings allow for minor angular errors or thermal expansion and contraction deformation during transmission, preventing component breakage or jamming caused by rigid connections. This component solves the problems of transmission wear resistance and motion conversion through bearings, and solves the problems of power coupling and length adjustment through the threaded connection between the connecting rod and connecting rod 35, ultimately achieving seamless switching between synchronous integration and independent separation of the two pin heads.

[0055] Reference Figure 4Positioning devices 4 are provided on both the first connecting rod 32 and the second connecting rod 34. The positioning device 4 includes a mounting groove 41, which is respectively opened on the outer ring side wall of the first bearing 31 and the second bearing 33. The positioning rod 42 is slidably installed in the mounting groove 41. The positioning rod 42 is fixedly installed on the first connecting rod 32 and the second connecting rod 34 respectively.

[0056] Furthermore, multiple sets of mounting grooves 41 and positioning rods 42 can be arranged along the circumferential direction of the first bearing 31 and the second bearing 33. The multiple sets of positioning structures are evenly or symmetrically distributed, and the sliding fit accuracy and dimensional matching degree of the positioning rods 42 and mounting grooves 41 are consistent.

[0057] A single positioning rod 42 and mounting groove 41 must bear the entire circumferential torque during power transmission. Prolonged loading can easily lead to problems such as bending of the positioning rod, cracking of the mounting groove, and excessive localized wear on the mating surfaces. Multiple positioning structures, evenly or symmetrically distributed along the bearing circumference, can distribute the circumferential torque evenly to each positioning component, ensuring consistent stress magnitude and uniform stress distribution on each positioning rod 42 and mounting groove 41, completely avoiding stress concentration at a single point. Simultaneously, uniform sliding fit accuracy and dimensional matching ensure the synchronous stress distribution of each positioning structure, preventing any one group from bearing additional loads due to fit deviations. This significantly reduces the wear rate of positioning components, extends the overall service life of the connecting rod, bearing, and positioning device, and reduces replacement and maintenance costs.

[0058] Reference Figure 5 Both the first connecting rod 32 and the second connecting rod 34 are threaded with fastening screws 5, and the bottom end of the fastening screws 5 can abut against the outer wall of the first bearing 31 and the second bearing 33 respectively.

[0059] The connecting rod and the outer ring of the bearing are separable and fitted together. If they are fixed only by the friction of the fastening screw 5, under the action of the circumferential torque generated by the high-speed rotation of the eccentric wheel and the power transmission, the connecting rod and the outer ring of the bearing are prone to relative circumferential rotation. This will cause the circumferential motion of the eccentric wheel to be unable to be effectively converted into the reciprocating oscillation of the connecting rod, resulting in power transmission loss or even interruption, directly causing the failure of the synchronization of the upper and lower nail heads and jamming of the nailing action. The positioning rod 42 is fixed on the connecting rod and slidably embedded in the mounting groove 41 of the outer ring of the bearing. The mounting groove 41 provides a strict circumferential limit for the positioning rod 42, effectively restricting the relative rotation between the connecting rod and the outer ring of the bearing. This allows the torque transmitted by the eccentric wheel through the bearing to be efficiently transmitted to the connecting rod, ensuring that the power transmission path from the eccentric wheel to the connecting rod and then to the connecting rod 35 is without deviation or loss, and ensuring the consistency of the movement of the upper and lower nail head mechanism 12 in the synchronous nail box mode. The positioning rod 42 of the positioning device 4 is designed to slide within the mounting groove 41, which is highly compatible with the structural requirements of the detachable and fixed connecting rod and bearing outer ring, balancing stability during fixing and flexibility during separation. The core of the separation / fixing operation of the connecting rod and bearing outer ring is the sliding of the connecting rod along the axial direction of the bearing outer ring. The mounting groove 41 provides a unique axial sliding trajectory for the positioning rod 42, preventing radial offset or circumferential torsion of the connecting rod during axial sliding. This ensures that after loosening the fastening screw 5, the connecting rod can smoothly slide along the preset direction to achieve separation, and can quickly return to the precise transmission position before tightening the screw. This significantly improves the operational efficiency of switching between synchronous and separation modes and avoids switching failures or equipment malfunctions caused by misalignment of parts during operation.

[0060] Reference Figure 3 The first connecting rod 32 and the second connecting rod 34 are both threaded to the connecting rod 35 and have scale lines on one end.

[0061] The scale lines provide a quantitative reference for adjusting the phase difference of the dual staple heads, precisely adapting to diverse stapleing processes. This transmission mechanism changes the overall length by rotating the connecting rod 35, thereby adjusting the phase of the upper and lower staple head eccentric wheels 22 and controlling the stapleing sequence to adapt to the stapleing requirements of different carton sizes and materials: for example, thick cardboard / large cartons require staggered staples to avoid vibration superposition, while thin cardboard / small cartons require simultaneous staples to ensure aesthetic stapleing. Without scale lines, operators can only rotate the connecting rod 35 based on experience, making the adjustment entirely subjective and prone to over- or under-adjustment, resulting in a phase difference that does not meet process requirements, leading to problems such as misaligned staples and insecure carton staples. The scale lines, however, visually present the engagement length of the connecting rod and the connecting rod 35 with quantitative graduations. Operators can precisely control the screw-in / out amount of the connecting rod 35 according to process requirements, achieving quantitative adjustment of the phase difference. This transforms the control of the stapleing sequence from experience-based operation to precise quantitative operation, ensuring that the adjustment accuracy matches the process standards of industrial production and adapting to the stapleing needs of different customers and different batches of cartons.

[0062] Preferably, the eccentricity of the eccentric shaft of the upper nail head eccentric wheel 21 is equal to that of the eccentric shaft of the lower nail head eccentric wheel 22.

[0063] The eccentricity of the eccentric wheel directly determines the stroke of the reciprocating nailing motion of the nail head mechanism. For every revolution of the eccentric wheel, the reciprocating distance of the connecting rod driven by the eccentric shaft is proportional to the eccentricity. Equal eccentricities mean that the strokes of the upper and lower eccentric wheels are completely identical. The equal eccentricity design ensures that the extension / retraction distance, movement speed, and amplitude of the nailing actuators are exactly the same in synchronous mode between the upper and lower nail head mechanisms 12. This ensures a high degree of consistency in the nailing depth and nail foot formation of the upper and lower carton covers, preventing situations where the upper cover is nailed too deeply and the lower cover too shallowly, or vice versa. This structurally guarantees the consistency of the synchronous nailing process, improving the nailing quality and aesthetics of the finished carton. Simultaneously, the equal eccentricity ensures uniform nailing force from the upper and lower nail heads, preventing offset and deformation during carton nailing due to uneven force, and adapting to the nailing needs of cartons of different thicknesses and specifications. If the eccentricity is not equal, the basic motion stroke of the upper and lower nail heads will differ. When adjusting the phase, both the timing difference and the stroke difference must be taken into account, making the adjustment logic complex and difficult to control precisely. With equal eccentricity, the basic motion of the upper and lower nail heads will be completely consistent. Phase adjustment only requires fine adjustment of the nailing time by adjusting the length of the connecting rod by 35, without adjusting the stroke. The adjustment logic is simple and highly quantifiable. Combined with the scale lines on the connecting rod, the phase difference can be accurately and repeatedly adjusted, ensuring that the preset process effect can be achieved after each adjustment, and avoiding adjustment failure caused by deviation of the basic stroke.

[0064] Reference Figure 1 First connecting rod 32 and second connecting rod 34

[0065] A locking nut 6 is threaded onto one end of the connecting rod 35, and the rotation direction of the locking nut 36 is opposite to that of the connecting rod 35.

[0066] When the transmission mechanism is working, the eccentric wheel's circular motion drives the connecting rod and link 35 to reciprocate and twist. The threaded connection between link 35 and the connecting rod will continuously bear alternating circumferential torque and axial tension. If relying solely on the self-locking property of the thread, it is very easy for the thread to loosen or disengage after long-term loading, resulting in a deviation in the effective length of the connecting rod. However, the direction of rotation of the locking nut 6 is opposite to that of the threads of link 35 and the connecting rod. After tightening, the thread engagement force between the locking nut 6 and the connecting rod, and the thread engagement force between link 35 and the connecting rod, will form a reverse thread preload force. The two restrain each other and form a mechanical self-locking mechanism. Even under alternating torque, the threaded connection will not rotate relative to each other, eliminating the loosening problem from the structural root and ensuring the tightness of the threaded connection.

[0067] Reference Figure 5Wear-resistant pads are fixedly installed at the connection positions of the first connecting rod 32 and the first bearing 31, and at the connection positions of the second connecting rod 34 and the second bearing 33.

[0068] When the nailing machine is working, the rotation of the eccentric wheel and the nailing of the nail head generate continuous vibration. This vibration is transmitted to the connection between the connecting rod and the bearing, causing the clamping force of the fastening screw 5 to gradually decrease, resulting in loosening of the connection and an increase in the fit clearance. The wear-resistant gasket has a certain elastic deformation capacity, which can effectively absorb the vibration impact during equipment operation, alleviate the impact of vibration on the loosening of the fastening screw 5, and fill the small gaps in the mating parts with its own elastic preload, so that the connection between the connecting rod and the bearing always remains tight, avoiding circumferential slippage caused by vibration, ensuring the stability of power transmission, and reducing nailing accuracy deviation caused by loosening of the connection.

[0069] Preferably, the sum of the adjustment lengths of the threaded connections between the connecting rod 35 and the first connecting rod 32 and the second connection is not less than twice the eccentricity of the upper nail head eccentric wheel 21.

[0070] The eccentricity of the eccentric wheel determines the stroke of the staple head. An adjustment length twice the eccentricity corresponds to a full phase difference adjustment range from 0° complete synchronization to 180° complete reversal of the upper and lower eccentric wheels: when link 35 is adjusted to its shortest position, the upper and lower eccentric wheels are in complete phase overlap, and both staple heads staple synchronously; when link 35 is adjusted to its longest position, the upper and lower eccentric wheels are in completely opposite phases, and both staple heads staple alternately. This adjustment range covers all cardboard box stapleping processes: whether it's the completely synchronized stapleping required for thin cardboard and small-sized cartons, the small-angle alternating stapleping required for thick cardboard and large-sized cartons, or the large-angle staggered stapleping required for special processes, precise adaptation can be achieved through this adjustment length. This makes the phase adjustment of the transmission mechanism universally applicable across all scenarios, without the need to replace link 35 or the connecting rod, significantly improving the equipment's process adaptability. If the adjustment length is less than twice the eccentricity, the phase difference adjustment will be limited in range, unable to achieve 0-180° full reversal adjustment, losing adaptability for some special stapleping processes and reducing the equipment's usability.

[0071] The implementation principle of a dual-head nailing machine transmission mechanism capable of quickly switching between synchronous and discrete modes according to an embodiment of this application is as follows: When the fastening screw 5 is tightened, the rotation of the upper nail head eccentric wheel 21 transmits power to the lower nail head eccentric wheel 22, driving the lower nail head mechanism 12 to operate, thus achieving synchronous nailing of the upper nail head mechanism 11 and the lower nail head mechanism 12. When switching modes, simply loosening the fastening screw 5 allows the removal of the first connecting rod 32, the second connecting rod 34, and the connecting rod 35, achieving separation of the upper nail head mechanism 11 and the lower nail head mechanism 12. This invention achieves a dual-head nailing machine transmission mechanism with a simple structure, low cost, and the ability to quickly switch modes. The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A transmission mechanism for a double-head nailing machine capable of quickly switching between synchronous and discrete modes, characterized in that: Including a nailing machine (1); The upper nail head mechanism (11) and the lower nail head mechanism (12) are provided on the nailing machine (1). Both the upper nail head mechanism (11) and the lower nail head mechanism (12) are connected to a transmission mechanism, which includes: Upper nail head eccentric wheel (21), the upper nail head eccentric wheel (21) is coaxially and fixedly connected to the input shaft of the upper nail head mechanism (11); The lower nail head eccentric wheel (22) is coaxially and fixedly connected to the input shaft of the lower nail head mechanism (12); A connecting assembly is rotatably mounted to the eccentric shaft of the upper nail head eccentric wheel (21) and to the eccentric shaft of the lower nail head eccentric wheel (22). The eccentricity of the eccentric shaft of the upper nail head eccentric wheel (21) is equal to that of the eccentric shaft of the lower nail head eccentric wheel (22); The connection component includes: The inner ring of the first bearing (31) is fixedly mounted on the eccentric shaft of the upper nail head eccentric wheel (21); The first connecting rod (32) has one end that is detachably and fixedly connected to the outer ring of the first bearing (31); The inner ring of the second bearing (33) is fixedly mounted on the eccentric shaft of the lower nail head eccentric wheel (22); The second connecting rod (34) has one end that is detachably and fixedly connected to the outer ring of the second bearing (33); The connecting rod (35) is a structure in which two sections of round rod are coaxially rotated and installed. One end of the connecting rod (35) is threadedly connected to the end of the first connecting rod (32) away from the upper nail head eccentric wheel (21), and the other end of the connecting rod (35) is threadedly connected to the end of the second connecting rod (34) away from the lower nail head eccentric wheel (22). Both the first connecting rod (32) and the second connecting rod (34) are threaded with fastening screws (5), and the bottom end of the fastening screws (5) can abut against the outer wall of the first bearing (31) and the second bearing (33), respectively.

2. The dual-head nailing machine transmission mechanism capable of quickly switching between synchronization and separation modes according to claim 1, characterized in that: The sum of the adjustment lengths of the threaded connections between the connecting rod (35) and the first connecting rod (32) and the second connecting rod (34) is not less than twice the eccentricity of the upper nail head eccentric wheel (21).

3. The dual-head nailing machine transmission mechanism capable of quickly switching between synchronization and separation modes according to claim 1, characterized in that: Positioning devices (4) are provided on both the first connecting rod (32) and the second connecting rod (34); The positioning device (4) includes: Mounting grooves (41) are respectively formed on the outer ring sidewalls of the first bearing (31) and the second bearing (33); Positioning rod (42) is fixedly installed on the first connecting rod (32) and the second connecting rod (34) respectively, and the positioning rod (42) can slide in the mounting groove (41).

4. The dual-head nailing machine transmission mechanism capable of quickly switching between synchronization and separation modes according to claim 1, characterized in that: The first connecting rod (32) and the second connecting rod (34) are both provided with scale lines on the end where they are threaded to the connecting rod (35).

5. The dual-head nailing machine transmission mechanism capable of quickly switching between synchronization and separation modes according to claim 1, characterized in that: The input shaft of the upper nail head mechanism (11) is connected to a drive device.

6. The dual-head nailing machine transmission mechanism capable of quickly switching between synchronization and separation modes according to claim 1, characterized in that: Both the first connecting rod (32) and the second connecting rod (34) have a locking nut (6) threaded onto one end near the connecting rod (35). The rotation direction of the locking nut (6) is opposite to that of the connecting rod (35).

7. The dual-head nailing machine transmission mechanism capable of quickly switching between synchronization and separation modes according to claim 1, characterized in that: Wear-resistant pads are fixedly installed at the connection positions of the first connecting rod (32) and the first bearing (31) and the second connecting rod (34) and the second bearing (33).

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