End face gluing device for oil pan installation

Abstract

The invention relates to the technical field of oil pan installation, in particular to an end face gluing device for oil pan installation, which comprises a rack and a glue outlet assembly arranged on the rack, the glue outlet assembly comprises a gluing pipe, and a glue outlet for extruding glue is arranged at the lower end of the gluing pipe. The glue outlet assembly is in linkage with a movable guide part, two sets of left positioning parts and right positioning parts which are symmetrically arranged on the two sides of the movable guide part are installed on the rack, the connecting line of the midpoints of the left positioning parts and the midpoints of the right positioning parts is arranged in the direction perpendicular to the sliding direction of the glue outlet assembly, and the glue outlet is always located on the perpendicular bisector of the connecting line of the midpoints of the left positioning parts and the right positioning parts during gluing. And a reset assembly for driving the glue outlet assembly to reset is linked between the glue outlet assembly and the rack. Accurate equidistant wiring of the rubber line and the edge of the metal plate is achieved through the positioning assembly, and the thickness of the rubber line on the end face of the oil pan can be consistent everywhere.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of oil sump installation, in particular to an end face gluing device for oil sump installation. BACKGROUND

[0002] As the core component of storing lubricating oil, the sealing performance of the oil sump and the transmission case shell directly determines the operation reliability of the automobile power assembly. Sealing failure will not only cause lubricating oil leakage, but also cause abnormal wear of key components such as gears and bearings. In severe cases, it will lead to the scrapping of the transmission case. Early oil sump sealing glue coating relies on manual operation. The operator holds an ordinary glue gun and applies it along the sealing groove. The gluing quality depends entirely on personal experience. In order to solve the drawbacks of manual gluing, various types of gluing auxiliary tools have been gradually developed in the industry.

[0003] The utility model patent with publication number CN202212329U discloses a sealing glue coating tool. The tool realizes the guidance of gluing operation through mechanical positioning. It includes a rotatable positioning mechanism. The positioning plate or positioning rod of the positioning mechanism is attached to the outer side of the oil sump panel to form a positioning reference during gluing. The purpose is to avoid the skewing of the glue line through the following movement of the positioning mechanism.

[0004] However, when the tool positioning mechanism faces the curved profile of the end face of the oil sump, the positioning plate or positioning rod moves along the outer side of the oil sump panel. If the positioning plate is always attached to the outer side panel at a perpendicular angle, as shown in the accompanying Figure 1 , the gluing trajectory is regular, as shown in the accompanying Figure 1 . If the positioning plate is attached to the outer side panel at a non-perpendicular angle, as shown in the accompanying Figure 2 , the gluing trajectory cannot always be equidistant from the outer side of the workpiece, as shown in the accompanying Figure 2 . If the angle of the positioning plate changes at any time during the attachment process, the gluing trajectory may be irregular, as shown in the accompanying Figure 3 . Therefore, when the positioning structure of the tool moves on the curved surface of the workpiece, the gluing angle of the tool relies on manual control, and the gluing effect is greatly affected by the proficiency of the operator. SUMMARY

[0005] The present application provides an end face gluing device for oil sump installation to solve the problems of skewed gluing trajectory, non-constant distance, and great influence of manual control.

[0006] In order to achieve the above object, the technical scheme of the present application is as follows: an end face glue coating device for oil pan installation, comprising a rack, a glue outlet assembly arranged on the rack, the glue outlet assembly comprising a glue coating pipe, the lower end of the glue coating pipe being provided with a glue outlet for extruding glue, characterized in that: the glue outlet assembly is slidably arranged on the rack, the glue outlet assembly is linked with a movable guide element, two groups of left positioning elements and right positioning elements symmetrically arranged on both sides of the movable guide element are installed on the rack, the connecting line between the midpoint of the left positioning element and the midpoint of the right positioning element is arranged along the sliding direction perpendicular to the glue outlet assembly, and the glue outlet is always on the perpendicular bisector of the connecting line between the midpoints of the left and right positioning elements during glue coating; the glue outlet assembly and the rack are linked with a reset assembly for driving the glue outlet assembly to reset.

[0007] The above technical scheme has the following advantages: through the cooperative action of the movable guide element, the left positioning element and the right positioning element, automatic guiding and accurate positioning during the glue coating process are achieved. In the glue coating operation, the movable guide element first contacts the outer edge of the workpiece, pushes the rack to make the left and right positioning elements abut against the outer edge, and forms a stable three-point positioning reference. Since the left and right positioning elements are symmetrically arranged and the connecting line between the midpoints thereof is perpendicular to the sliding direction of the glue outlet assembly, and the glue outlet is always located on the perpendicular bisector of the connecting line, this ensures that the glue outlet is always in the normal direction of the outer edge of the workpiece during movement, and maintains a constant distance from the outer edge. The reset assembly drives the glue outlet assembly to reset, so that the movable guide element continuously adheres to the outer edge of the workpiece, and the movable guide element can move on the perpendicular bisector of the connecting line of the left and right positioning elements when the surface curvature of the outer edge of the workpiece changes, thereby adapting to the curvature change of the outer edge. This structure eliminates the dependence on the experience of the operator, automatically maintains the glue coating track equidistant from the outer edge, improves the consistency and precision of glue coating, reduces the skewing or distance fluctuation of the glue line, effectively prevents the risk of oil leakage caused by uneven coating of the sealing glue, enhances the sealing reliability of the oil pan and the gearbox shell, and is suitable for glue coating of the end face of various oil pans with curved profiles.

[0008] The above technical scheme can be further provided as follows: the glue outlet assembly comprises a glue outlet support, the glue coating pipe is installed on the glue outlet support, the movable guide element comprises a sleeve fixed with the glue outlet support and a driving rod penetrating the sleeve, the lower end of the driving rod is provided with a driving wheel and a first limiting edge, a screw rod is installed in the glue coating pipe, a piston element is sleeved outside the screw rod, the piston element is provided with an internal thread matched with the screw rod, the screw rod can drive the piston element to move upward or downward in the glue coating pipe when the screw rod rotates, and a transmission assembly is linked between the movable guide element and the screw rod.

[0009] The above technical solution refines the structure of the dispensing assembly and the movable guide, achieving precise control of the adhesive application amount through mechanical transmission. The dispensing bracket serves as a support frame, integrating the dispensing tube and the movable guide. The lower end of the drive rod in the movable guide is equipped with a drive wheel. When the device moves along the outer edge of the workpiece, the drive wheel rolls in contact with the outer edge surface, converting linear motion into rotational motion of the drive rod. The drive rod is fixed to the dispensing bracket via a sleeve to ensure motion stability, and a first limit stop prevents the drive wheel from falling off. The screw and piston inside the dispensing tube constitute the extrusion mechanism: the screw has external threads, and the piston has matching internal threads. When the screw rotates, it drives the piston to move axially within the dispensing tube via the threaded pair. Upward movement draws in adhesive or prepares for dispensing, while downward movement pushes the adhesive out of the dispensing port. The transmission assembly links the movable guide and the screw, transmitting the rotational motion of the drive rod to the screw, achieving a synchronous mechanism of "dispensing the amount of adhesive based on the distance traveled." In this way, the length of the adhesive application trajectory directly corresponds to the number of rotations of the screw, thereby controlling the displacement of the piston and the amount of adhesive dispensed. This ensures that the adhesive line is uniform and continuous, avoiding waste or poor sealing caused by too much or too little adhesive. This structure reduces manual intervention, has a high degree of automation, and even operators without adhesive application experience can achieve uniform adhesive dispensing.

[0010] The above technical solution can be further configured such that the transmission component includes a first bevel gear, which is linked to the upper end of the drive rod; a first shaft groove is horizontally opened in the glue dispensing bracket, and a first driven rod is rotatably inserted in the first shaft groove; a first limiting groove is provided on the outer side of the first driven rod, and a first limiting protrusion is provided in the shaft groove corresponding to the first limiting groove; a second bevel gear is linked to the first driven rod, and the second bevel gear meshes with the first bevel gear; a first through hole is provided horizontally at the upper end of the glue dispensing tube, and a third bevel gear is rotatably installed in the first through hole, which is linked to the first driven rod; a second through hole is vertically opened in the glue dispensing tube, and a fourth bevel gear is rotatably installed in the second through hole, which is linked to the upper end of the screw, and the fourth bevel gear meshes with the third bevel gear.

[0011] The above technical solution describes the gear system structure of the transmission assembly, achieving motion direction conversion and efficient power transmission. A first bevel gear is mounted on the upper end of the drive rod, and the two rotate synchronously via a keyway (synchronous rotation can also be achieved through welding, pins, or other relatively fixed methods). When the drive rod rotates with the drive wheel, the first bevel gear drives the second bevel gear, which meshes with it, to rotate, converting the vertical motion to a horizontal motion. A first driven rod is inserted into the shaft groove of the glue dispensing bracket. The axial movement of the first driven rod is restricted by the cooperation of a first limiting groove and a first limiting protrusion, but its free rotation is allowed, ensuring smooth transmission. The second bevel gear meshes with the keyway of the first driven rod, transmitting rotational motion to the first driven rod. A third bevel gear is installed in the first through hole and meshes with the keyway of the first driven rod, causing the rotation of the first driven rod to drive the third bevel gear. A fourth bevel gear is installed in the vertical second through hole, meshing with the third bevel gear to convert the horizontal rotation back to vertical rotation. The fourth bevel gear connects to the keyway at the upper end of the screw, thereby driving the screw to rotate. This bevel gear assembly achieves two conversions in the direction of motion: from the vertical rotation of the drive rod to its horizontal rotation, and then to the vertical rotation of the screw. This ensures efficient, proportional, and stepless power transmission to the screw, driving the piston to move precisely. The assembly features a compact structure, stable transmission ratio, reduced energy loss, improved dispensing control accuracy and response speed, reliable gear meshing, and high durability, making it suitable for long-term, high-intensity use.

[0012] The above technical solution can be further configured such that the transmission assembly includes a one-way transmission structure, the one-way transmission structure including a second driven rod horizontally disposed inside the glue dispensing bracket, an outer ratchet mounted on the right end of the second driven rod, a third driven rod coaxially disposed on the right side of the second driven rod, and an inner ratchet mounted on the left end of the third driven rod and meshing with the outer ratchet. The outer ratchet is linked with the second driven rod, and the inner ratchet is linked with the third driven rod. The transmission assembly also includes a first bevel gear, the first bevel gear being linked with the upper end of the driving rod. A second shaft groove is horizontally provided inside the glue dispensing bracket, the second driven rod is rotatably mounted in the shaft groove, a second limiting groove is provided on the outer side of the second driven rod, and a second limiting protrusion is provided in the shaft groove corresponding to the second limiting groove. The third driven rod has a third limiting groove on its outer side, and the glue dispensing bracket has a third limiting protrusion corresponding to the third limiting groove. A clutch spring is sleeved on the outer side of the third driven rod. The right end of the inner ratchet abuts against the clutch spring, and the end of the clutch spring away from the inner ratchet abuts against the third limiting protrusion. The second driven rod is linked to a second bevel gear, which meshes with a first bevel gear. The upper end of the glue dispensing tube has a horizontal first through hole, in which a third bevel gear is rotatably installed. The third driven rod is linked to the third bevel gear. The glue dispensing tube has a vertical second through hole, in which a fourth bevel gear is rotatably installed. The fourth bevel gear is linked to the upper end of the screw, and meshes with the third bevel gear.

[0013] The above technical solution incorporates a ratchet mechanism into the transmission assembly, achieving unidirectional transmission and preventing adhesive backflow. The meshing of the first and second bevel gears transmits the rotation of the driving rod to the second driven rod. The second driven rod, through the engagement of the first limiting protrusion and the second limiting groove within the shaft groove, ensures axial fixation and free rotation. An external ratchet is mounted on the right end of the second driven rod, and an internal ratchet is located on the left end of the third driven rod, which, through the engagement of the third limiting groove and the third limiting protrusion, achieves axial limitation of the third driven rod. When the inner and outer ratchet engage, a one-way clutch is formed: when the device moves forward in the adhesive application direction, the outer ratchet teeth drive the inner ratchet teeth to rotate, thereby transmitting power to the screw through the third driven rod, the third bevel gear, and the fourth bevel gear, pushing the piston to extrude the adhesive; when the device moves in the reverse direction, the outer ratchet teeth disengage from the inner ratchet teeth along the inclined surface, disconnecting the power transmission of the ratchet mechanism, preventing the screw from reversing, preventing the adhesive from being sucked back into the adhesive application tube, ensuring continuous and stable adhesive application, and eliminating problems such as adhesive interruption or reduced adhesive quantity. This design is particularly suitable for reciprocating or curved adhesive application scenarios, eliminating the interference of retraction motion on the adhesive application quality. At the same time, the ratchet structure is simple and reliable, reducing the complexity of the transmission system, providing high anti-interference capability, controlling the adhesive application process, and reducing the risk of adhesive waste and sealing defects.

[0014] The above technical solution can be further configured such that the right end of the second driven rod is provided with a second limiting stop to prevent the outer ratchet from disengaging from the second driven rod, and the glue dispensing bracket is hingedly equipped with a clutch switch. The clutch switch includes an operating part partially exposed on the outside of the glue dispensing bracket and a pawl that is linked with the inner ratchet. Moving the operating part can cause the pawl to drive the inner ratchet to separate from the outer ratchet.

[0015] The above technical solution incorporates a clutch adjustment mechanism, enhancing the device's operational flexibility and safety. A clutch spring is sleeved on the outside of the third driven rod, with one end abutting the inner ratchet and the other end abutting the third limiting protrusion. Spring pressure maintains the default engagement of the inner and outer ratchet, ensuring unidirectional transmission during normal glue application. The clutch switch is hinged to the glue dispensing bracket, with the operating part exposed for easy manual operation. The pawl is linked to the inner ratchet. When temporary adjustment or stopping glue application is required, the operator can move the operating part, causing the pawl to push the inner ratchet axially, overcoming the clutch spring's elasticity and separating the inner and outer ratchet. After separation, transmission is interrupted, the screw stops rotating, glue dispensing pauses, allowing the device to move freely without dispensing glue, facilitating repositioning or skipping non-glue areas. When the operating part is moved back, the clutch spring pushes the inner ratchet back to its original position and re-engages with the outer ratchet, restoring the glue application function. This clutch design also prevents accidental glue extrusion due to misoperation, improving operational safety. At the same time, it enhances the adaptability of the device, allowing for flexible control of the glue application start and stop based on changes in the workpiece contour, optimizing the glue application path, and reducing glue waste.

[0016] The above technical solution can be further configured such that a scale groove is provided on one side of the glue-applying tube, scale lines are provided on both sides of the scale groove on the glue-applying tube, a float is fixed on the piston component facing the scale groove, and one end of the float protrudes from the scale groove.

[0017] The above technical solution adds a visual function for glue quantity, facilitating real-time monitoring and adjustment of the glue application status. A graduated groove is located on one side of the glue application tube, with graduations on both sides providing clear measurement references, typically indicated in units of length or volume. A float fixed to the piston extends into the graduated groove and protrudes outwards, sliding synchronously up and down with the axial movement of the piston. As the piston moves within the glue application tube, the float moves along the graduated groove, allowing operators to directly read the remaining glue quantity or the amount extruded by observing the graduations corresponding to the float's position. This visual design provides real-time feedback on glue quantity, helping operators predict the glue application progress, replenish glue promptly, or adjust the movement speed, avoiding glue application interruptions due to insufficient quantity or waste caused by excessive quantity. Simultaneously, the protruding float design enhances visibility, making it easily identifiable even in low-light conditions. This structure is simple and effective, without increasing energy consumption. The controllable and transparent glue application process facilitates quality inspection and production management, reducing the risk of glue interruption and seal failure due to incorrect glue quantity estimation. It is suitable for applications requiring high glue quantity accuracy.

[0018] The above technical solution can be further configured such that the two sides of the upper end of the glue dispensing bracket extend outward to form a first guide protrusion, and the frame is provided with a first guide groove on the side near the glue dispensing bracket corresponding to the first guide protrusion. The first guide protrusion is installed in the first guide groove and can slide along the first guide groove.

[0019] The above technical solution optimizes the sliding connection structure between the dispensing assembly and the frame, improving motion stability and guiding accuracy. First guide protrusions are formed on both sides of the upper end of the dispensing bracket, acting as sliding guide blocks and matching the first guide groove on the frame. This protrusion and groove cooperation forms a stable guide pair. The first guide protrusion slides linearly within the first guide groove, restricting the dispensing assembly's degrees of freedom other than the sliding direction, preventing lateral swaying or tilting, and ensuring a straight trajectory for the dispensing nozzle during movement. This simplifies assembly and maintenance; the protrusions and grooves are easy to clean and lubricate, extending the device's service life. The dispensing assembly's sliding is precise and reliable, further improving the consistency of the dispensing trajectory.

[0020] The above technical solution can be further configured such that the reset assembly includes a reset shaft disposed on the glue dispensing bracket and a reset hole on the frame corresponding to the reset shaft. A reset spring is sleeved on the outside of the reset shaft, with one end of the reset spring abutting against the frame and the other end of the reset spring abutting against the glue dispensing bracket.

[0021] The above technical solution describes the structure of the reset assembly, achieving automatic reset and continuous adhesion of the dispensing assembly. The reset shaft is fixed to the dispensing bracket and inserted into the reset hole of the frame, forming an axial guide to ensure the reset movement is linear. A reset spring is sleeved on the outside of the reset shaft, with one end abutting the frame as a fixed end and the other end abutting the dispensing bracket as a movable end. When the movable guide contacts the outer edge of the workpiece and is compressed, the dispensing assembly slides along the frame, compressing the reset spring and storing elastic potential energy. When the external force decreases or the device moves, the reset spring releases its potential energy, pushing the dispensing bracket back to its original position, ensuring the movable guide remains firmly against the outer edge of the workpiece. This spring reset mechanism provides a constant adhesion force, adapting to changes in the workpiece surface contour, such as arcs or uneven areas, maintaining stable contact and avoiding detachment or jumping caused by uneven manual pushing force. Simultaneously, the reset spring buffers the impact of movement, reducing component wear and improving operational comfort. This structure is simple and reliable, requires no external power, reduces energy consumption and maintenance costs, ensures the continuity and precision of the guide during the adhesive application process, and enhances the uniformity of the sealant application.

[0022] The above technical solution can be further configured such that the glue dispensing assembly includes a glue distance adjustment structure for adjusting the distance between the glue dispensing tube and the movable guide member. The glue distance adjustment structure includes an adjustment groove formed on the side of the glue dispensing bracket and an adjustment knob for locking the glue dispensing tube onto the glue dispensing bracket. The adjustment knob passes through the adjustment groove and is installed at the upper end of the glue dispensing tube. When the adjustment knob is released, the glue dispensing tube can slide on the glue dispensing bracket. The two sides of the upper end of the glue dispensing tube extend outward to form a second guide protrusion. The glue dispensing bracket has a second guide groove on the side near the glue dispensing tube corresponding to the second guide protrusion. The second guide protrusion is installed in the second guide groove and can slide along the second guide groove.

[0023] The above technical solution incorporates an adhesive distance adjustment function, enabling the device to adapt to different workpiece sizes or adhesive application distance requirements. An adjustment groove is located on the side of the adhesive outlet bracket, serving as a channel for adjusting the position of the adhesive application tube. An adjustment knob passes through the adjustment groove and connects to the upper end of the adhesive application tube, locking or releasing it by tightening or loosening. When the adjustment knob is loosened, the adhesive application tube slides along the second guide groove on the adhesive outlet bracket. The second guide protrusion, in conjunction with the second guide groove, provides smooth linear guidance, preventing the adhesive application tube from deflecting. The operator can adjust the distance between the adhesive outlet and the movable guide component by sliding the adhesive application tube according to the width of the workpiece's outer edge or the position of the sealing groove. After adjusting to the preset value, the adjustment knob is tightened to fix it. This design enables rapid fine-tuning of the adhesive application distance without the need to replace parts or use complex tools, improving the device's versatility and adaptability. It allows for customized settings for different models of oil pans or adhesive application specifications, ensuring the adhesive outlet is always in the optimal position and maintaining a constant adhesive line and edge distance. Simultaneously, the second guide protrusion and second groove ensure stability during adjustment, preventing the adhesive application tube from shaking and affecting accuracy. This structure is easy to operate, saves adjustment time, and improves production efficiency and consistency of adhesive coating quality.

[0024] The above technical solution can be further configured such that a handle for gripping is provided at the lower end of the left side of the frame, a connecting seat is provided at the lower end of the handle, the upper ends of the left and right positioning parts are fixed to the frame, and the lower ends of the left and right positioning parts are fixed to the connecting seat.

[0025] The above technical solution enhances the structural strength and operational convenience of the positioning components. The handle, located at the lower left side of the frame, provides a comfortable grip, allowing operators to easily hold the device with one or two hands for applying force or guiding movement, reducing fatigue. The connecting seat at the lower end of the handle serves as an additional support point, fixed to the lower ends of the left and right positioning components, forming a double-end fixed structure: the upper ends of the left and right positioning components are fixed to the frame, and the lower ends are fixed to the connecting seat. Transforming the positioning component from a cantilever beam to a beam structure supported at both ends significantly improves bending stiffness and stability, preventing bending or vibration when the positioning component abuts against the outer edge of the workpiece, ensuring long-lasting and reliable positioning accuracy. The connecting seat also distributes stress, reducing stress concentration at the connection between the frame and the positioning component, extending component lifespan. The addition of the handle improves ergonomics, making operation smoother and more controllable, particularly suitable for long-term or high-intensity adhesive application operations. The overall structure is more robust and durable, adapting to various workpiece surface pressures, maintaining the accuracy of the adhesive application trajectory, and further enhancing device reliability and user experience.

[0026] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. Attached Figure Description

[0027] Figure 1 A diagram showing the working state and effect of a sealant application tool constantly and vertically adhering to a curved surface; Figure 2 Diagram showing the working state of a sealant coating tool in constant non-perpendicular contact with a circular arc surface; Figure 3 A diagram illustrating the working effect of a sealant application tool with a non-constant angle fitting onto a curved surface. Figure 4 This is a schematic diagram of the overall structure of Example 1; Figure 5 This is a cross-sectional structural diagram of Example 1; Figure 6 This is a schematic diagram of the exploded structure of Example 1; Figure 7 This is a cross-sectional structural diagram of Example 2; Figure 8 This is a schematic diagram of the exploded structure of Example 2. Figure 9 This is a schematic diagram of the inner and outer ratchet structures in Example 2; Figure 10 This is a schematic diagram showing the position of the movable guide when the active wheel is in contact with the surface according to the present invention; Figure 11 A schematic diagram showing the position of the adhesive applicator tube when the adhesive gap is at its maximum according to the present invention; Frame 1, glue dispensing assembly 2, glue dispensing bracket 21, first guide protrusion 211, first guide groove 11, glue application tube 22, glue outlet 221, second guide protrusion 222, second guide groove 212, adjusting groove 213, adjusting knob 214, screw 23, piston 24, scale groove 223, float 241, movable guide 3, sleeve 31, driving rod 32, driving wheel 321, first limiting stop 322, transmission assembly 4, first bevel gear 41, second limiting stop 411, second bevel gear 42, third bevel gear 43, fourth bevel gear 44, first driven rod 45, shaft groove 215. First limiting groove 451, first limiting protrusion 216, first through hole 224, 225, second through hole 226, left positioning part 51, right positioning part 52, handle 12, connecting seat 13, reset assembly 6, reset shaft 61, reset hole 14, reset spring 62, second driven rod 46, second limiting groove 461, third limiting stop 462, second limiting protrusion 217, third driven rod 47, third limiting groove 471, fourth limiting stop 472, third limiting protrusion 218, outer ratchet 48, inner ratchet 49, clutch spring 410, clutch switch 411, operating part 4111, pawl 4112 Detailed Implementation

[0028] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Example 1: As Figures 4-6 As shown, the end face adhesive application device for oil pan mounting of the present invention includes at least the following technical solutions: An end-face adhesive applicator mounted on an oil pan includes a frame 1. An adhesive dispensing assembly 2 is mounted on the frame 1 and can slide along it in the forward-backward direction. The adhesive dispensing assembly 2 includes an adhesive dispensing bracket 21, with first guide protrusions 211 extending outward from both sides of its upper end. A first guide groove 11 is correspondingly formed on the side of the frame 1 closest to the adhesive dispensing bracket 21. The first guide protrusions 211 are installed within the first guide groove 11 and can slide forward-backward along it, thereby achieving smooth linear movement of the adhesive dispensing assembly 2 relative to the frame 1.

[0030] The dispensing assembly 2 also includes a dispensing tube 22 mounted on a dispensing bracket 21. The lower end of the dispensing tube 22 has a dispensing port 221 for extruding sealant. The upper ends of the dispensing tube 22 extend outwards on both sides to form second guide protrusions 222. The dispensing bracket 21 has a corresponding second guide groove 212 on the side near the dispensing tube 22. The second guide protrusions 222 are installed in the second guide groove 212 and can slide back and forth along it. A vertical screw 23 is installed inside the dispensing tube 22, and the screw 23 has external threads. A piston 24 is sleeved around the screw 23, and the piston 24 has internal threads that mate with the external threads. Its working principle is as follows: when the screw 23 rotates, the piston 24 is driven to move upwards or downwards inside the dispensing tube 22 via the threaded pair. Moving upwards allows for the storage of sealant, while moving downwards expels sealant from the dispensing port 221. To visually display the amount of adhesive, a vertical graduated groove 223 is provided on one side of the adhesive applicator 22, and graduated lines (not shown in the figure) are provided on both sides of the graduated groove 223. A float 241 is fixed to the side of the piston 24 facing the graduated groove 223. One end of the float 241 protrudes from the graduated groove 223 and can move synchronously with the piston 24 to indicate the adhesive level.

[0031] The dispensing assembly 2 is linked to a movable guide 3, which contacts the outer edge of the workpiece during glue application and drives the dispensing assembly 2 to slide. The movable guide 3 includes a sleeve 31 fixedly connected to the dispensing bracket 21, and an active rod 32 passing through the sleeve 31. An active wheel 321 is installed at the lower end of the active rod 32, and a first limiting stop 322 is provided at the lower end to prevent it from dislodging from the sleeve 31. In order to adjust the distance (i.e., the glue application distance) between the glue outlet 221 and the movable guide 3, the device is provided with a glue distance adjustment structure. This structure includes an elongated adjustment groove 213 opened on the side of the dispensing bracket 21, and an adjustment knob 214. The adjustment knob 214 passes through the adjustment groove 213 and is tightened at the upper end of the glue application tube 22. When the adjustment knob 214 is loosened, the glue applicator tube 22, together with its second guide protrusion 222, can slide up and down in the second guide groove 212 of the glue dispensing bracket 21 to adjust its height; after adjusting to the desired position, tightening the adjustment knob 214 will lock the glue applicator tube 22 onto the glue dispensing bracket 21.

[0032] The movable guide 3 and the screw 23 are linked by a transmission assembly 4. The transmission assembly 4 includes a first bevel gear 41, a second bevel gear 42, a third bevel gear 43, a fourth bevel gear 44, and a first driven rod 45. The upper end of the driving rod 32 is connected to the first bevel gear 41 via a keyway, and the upper end of the driving rod 32 is provided with a second limiting stop 411 to prevent the first bevel gear 41 from moving axially. A horizontal shaft groove 215 is provided in the glue dispensing bracket 21, and the first driven rod 45 is rotatably inserted into the shaft groove 215. A first limiting groove 451 is provided around the outer side of the first driven rod 45, and a first limiting protrusion 216 is provided in the shaft groove 215. The first limiting protrusion 216 is engaged in the first limiting groove 451, thereby restricting the axial movement of the first driven rod 45 but allowing it to rotate freely. The second bevel gear 42 is mounted on the first driven rod 45 via a keyway and meshes with the first bevel gear 41. The upper end of the glue-applying tube 22 has horizontal first through holes 224 and 225. The third bevel gear 43 is rotatably installed in the first through hole 224, and the third bevel gear 43 is engaged with the first driven rod 45 through a keyway. The glue-applying tube 22 also has a vertical second through hole 226. The fourth bevel gear 44 is rotatably installed in the second through hole 226. The fourth bevel gear 44 meshes with the third bevel gear 43, and its lower end is connected to the upper end of the screw 23 through a keyway.

[0033] Two sets of positioning components are fixedly installed on the frame 1, namely, the left positioning component 51 and the right positioning component 52 symmetrically arranged on the left and right sides of the movable guide component 3. The line connecting the midpoint of the left positioning component 51 and the midpoint of the right positioning component 52 is set perpendicular to the sliding direction (i.e., the front-back direction) of the glue dispensing assembly 2, that is, the line is in the left-right direction. During glue application, the glue outlet 221 is designed to always be on the perpendicular bisector of the line connecting the midpoints of the left positioning component 51 and the right positioning component 52. To enhance structural strength, a handle 12 for the operator to grip is provided at the lower left side of the frame 1, and a connecting seat 13 is provided at the lower end of the handle 12. The upper ends of the left positioning component 51 and the right positioning component 52 are fixed to the frame 1, and their lower ends are also fixed to the connecting seat 13, forming a stable double-support structure.

[0034] A reset assembly 6 is linked to the glue dispensing assembly 2 and the frame 1 to drive the glue dispensing assembly 2 to reset. The reset assembly 6 includes a reset shaft 61 fixed on the glue dispensing bracket 21 and a corresponding reset hole 14 on the frame 1. The reset shaft 61 is inserted into the reset hole 14, and a reset spring 62 is sleeved on its outer side. One end of the reset spring 62 abuts against the frame 1, and the other end abuts against the glue dispensing bracket 21.

[0035] The working principle of this embodiment is as follows: Before applying the adhesive, the height of the adhesive applicator 22 is adjusted using the adhesive gap adjustment structure according to the width of the workpiece's outer edge or the required adhesive line distance, so that the adhesive outlet 221 reaches the predetermined position. During adhesive application, the operator holds the handle 12 and first places the drive wheel 321 at the lower end of the movable guide 3 against the outer edge of the end face of the oil pan to be coated. Then, the entire device is pushed forward, causing the left positioning member 51 and the right positioning member 52 to simultaneously abut against the outer edge. At this time, the movable guide 3 forms a three-point contact with the left and right positioning members 51 and 52, which together determine the movement path of the device. Since the left and right positioning members 51 and 52 are symmetrically arranged and the line connecting their midpoints is perpendicular to the sliding direction, and the adhesive outlet 221 is always located on the perpendicular bisector of this line, the movement trajectory of the adhesive outlet 221 will always be located in the normal direction of the outer edge and maintain a constant distance from the outer edge, regardless of how the device moves along the curved outer edge. During the movement, the drive wheel 321 rolls along the outer edge, driving the drive rod 32 to rotate. Power is transmitted to the first driven rod 45 via the first bevel gear 41 and the second bevel gear 42, and then to the screw 23 via the third bevel gear 43 and the fourth bevel gear 44. The rotation of the screw 23 pushes the piston 24 downward, thereby extruding a measured amount of sealant from the dispensing nozzle 221 from the dispensing tube 22. The distance the device moves is proportional to the number of rotations of the driving wheel 321, and thus proportional to the number of rotations of the screw 23 and the displacement of the piston 24, achieving synchronous and precise control of "how much distance is traveled, how much sealant is dispensed". The return spring 62 always applies a forward thrust to the dispensing bracket 21, ensuring that the driving wheel 321 can always closely contact and adaptively move back and forth when the outer curvature of the workpiece changes, maintaining a stable three-point contact state.

[0036] Example 2: This example is basically the same as Example 1 in terms of overall framework, positioning principle, sliding structure, reset component, adjustment structure, and handle structure. The main difference lies in the specific construction of the transmission component 4. Therefore, the same parts will be described using the same reference numerals as in Example 1, and the different parts will use new reference numerals.

[0037] like Figure 7 , 8 The end-face adhesive applicator for the oil pan mounting shown in Figure 9 of this embodiment also includes a frame 1 and an adhesive dispensing assembly 2 slidably mounted thereon. The adhesive dispensing assembly 2 includes an adhesive dispensing bracket 21 and an adhesive dispensing tube 22, which slide through a first guide protrusion 211 engaging with a first guide groove 11. The adhesive dispensing tube 22 engages with a second guide protrusion 222 engaging with a second guide groove 212 and can be height-adjusted using an adjustment knob 214 and an adjustment slot 213. The adhesive dispensing tube 22 contains a screw 23 and a piston 24, and has a scale groove 223 with a float 241 for visualizing the amount of adhesive. The frame 1 is provided with a left positioning member 51 and a right positioning member 52, and is reinforced by a handle 12 and a connecting seat 13. The reset assembly 6 consists of a reset shaft 61 and a reset spring 62.

[0038] The movable guide component 3 also includes a sleeve 31, a drive rod 32, a drive wheel 321, and a first limit stop 322.

[0039] The transmission assembly 4 in this embodiment includes a first bevel gear 41, a second bevel gear 42, a third bevel gear 43, a fourth bevel gear 44, a second driven rod 46, a third driven rod 47, an outer ratchet 48, and an inner ratchet 49. The first bevel gear 41 is mounted on the upper end of the driving rod 32 and is limited by a second limiting stop 411. A horizontal shaft groove 215 is formed in the glue dispensing bracket 21, into which the second driven rod 46 is rotatably inserted. A first limiting protrusion 216 is provided in the shaft groove 215, and a second limiting groove 461 is correspondingly formed on the outer side of the second driven rod 46 to achieve axial limiting. The second bevel gear 42 is mounted on the second driven rod 46 and meshes with the first bevel gear 41. An outer ratchet 48 is mounted on the right end of the second driven rod 46, and a third limiting stop 462 is provided on the right end of the second driven rod 46. It should be noted that the "left" and "right" directions described in this structure are relative positions based on the perspective of the accompanying drawings. The glue dispensing bracket 21 has a second limiting protrusion 217 located on the left side of the outer ratchet 48. The outer ratchet 48 is clamped between the second limiting protrusion 217 and the third limiting stop 462 to achieve axial fixation.

[0040] Inside the glue dispensing bracket 21, a third limiting protrusion 218 is provided on the right side of the outer ratchet 48. A third limiting groove 471 is formed on the outer side of the third driven rod 47, and the third limiting protrusion 218 is inserted into the groove, thereby restricting the axial movement of the third driven rod 47 but allowing its rotation. An inner ratchet 49 is provided at the left end of the third driven rod 47, and a fourth limiting stop 472 is provided at the left end of the third driven rod 47. A clutch spring 410 is sleeved on the outer side of the third driven rod 47. The left end face of the inner ratchet 49 abuts against the fourth limiting stop 472, and the right end face abuts against one end of the clutch spring 410. The other end of the clutch spring 410 abuts against the third limiting protrusion 218. Under the elastic force of the clutch spring 410, the inner ratchet 49 is pushed to the left, so that its teeth are engaged with the teeth of the outer ratchet 48. A third bevel gear 43 is installed in the first through hole 224 at the upper end of the glue-applying tube 22, and the third driven rod 47 engages with the third bevel gear 43 through a keyway. A fourth bevel gear 44 is installed in the vertical second through hole 226, and the fourth bevel gear 44 meshes with the third bevel gear 43 and is connected to the upper end of the screw 23 through a keyway.

[0041] In addition, a clutch switch 411 is hinged to the glue dispensing bracket 21. The clutch switch 411 includes an operating part 4111 that protrudes partially from the outside of the glue dispensing bracket 21 for easy operation, and a pawl 4112 that is linked to the inner ratchet 49. Its working principle is as follows: when the operating part 4111 is moved to one side, the pawl 4112 pushes the inner ratchet 49 to move to the right against the spring force of the clutch spring 410, thereby separating the inner ratchet 49 from the outer ratchet 48 and interrupting the power transmission.

[0042] The working principle of this embodiment is as follows: The glue application positioning process, distance maintenance principle, and reset function in this embodiment are the same as in Embodiment 1. Its unique transmission and glue dispensing control lies in the following: when the device moves along the glue application direction (e.g., forward), the drive wheel 321 rolls, driving the drive rod 32 and the first bevel gear 41 to rotate. Power is transmitted via the second bevel gear 42 to the second driven rod 46 and the outer ratchet 48. Since the inner ratchet 49 engages with the outer ratchet 48 under the action of the clutch spring 410, the rotation of the outer ratchet 48 drives the inner ratchet 49 and the third driven rod 47 to rotate together via the ratchet mechanism. Power is then transmitted via the third bevel gear 43 and the fourth bevel gear 44 to the screw 23, driving the piston 24 to move downwards and dispense glue. If the operator accidentally moves the device backwards, the outer ratchet 48 rotates in the opposite direction. At this time, slippage occurs between the inner ratchet 49 and the outer ratchet 48 of the ratchet mechanism. The inner ratchet 49 does not rotate, and thus the screw 23 does not reverse, preventing the piston 24 from moving upward and sucking back the extruded adhesive, ensuring the continuity and stability of the adhesive application. When it is necessary to temporarily stop the adhesive dispensing (e.g., repositioning at a workpiece corner or skipping areas that do not need adhesive application), simply move the operating part 4111 of the clutch switch 411, causing the pawl 4112 to push the inner ratchet 49 out of engagement with the outer ratchet 48, thus cutting off the transmission chain. At this time, no matter how the device moves, power cannot be transmitted to the screw 23, achieving a pause in adhesive dispensing. After releasing the clutch switch 411, the inner ratchet 49 resets and re-engages under the action of the clutch spring 410, restoring the normal adhesive application function. This clutch design also serves to prevent accidental activation.

[0043] The embodiments described above are merely examples of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. An end-face adhesive application device for oil pan mounting, comprising a frame and an adhesive dispensing assembly mounted on the frame, the adhesive dispensing assembly including an adhesive application tube, the lower end of the adhesive application tube having an adhesive extrusion outlet, characterized in that: The dispensing assembly is slidably mounted on the frame. The dispensing assembly is linked to a movable guide. Two sets of left and right positioning components are symmetrically arranged on both sides of the movable guide. The line connecting the midpoint of the left positioning component and the midpoint of the right positioning component is perpendicular to the sliding direction of the dispensing assembly. During dispensing, the dispensing port is always located on the perpendicular bisector of the line connecting the midpoints of the left and right positioning components. A reset component is linked between the dispensing assembly and the frame to drive the dispensing assembly to reset.

2. The end face adhesive applicator for oil pan mounting according to claim 1, characterized in that: The dispensing assembly includes a dispensing bracket, the dispensing tube is mounted on the dispensing bracket, the movable guide includes a sleeve fixed to the dispensing bracket and a drive rod passing through the sleeve, the lower end of the drive rod is equipped with a drive wheel and a first limiting stop is provided at the lower end of the drive rod, a screw is installed in the dispensing tube, a piston is sleeved on the outside of the screw, the piston is provided with an internal thread that mates with the screw, when the screw rotates, it can drive the piston to move up or down in the dispensing tube, and a transmission assembly is linked between the movable guide and the screw.

3. The end face adhesive applicator for oil pan mounting according to claim 2, characterized in that: The transmission assembly includes a first bevel gear, which is linked to the upper end of the drive rod. A first shaft groove is horizontally opened in the glue dispensing bracket, and a first driven rod is rotatably inserted in the first shaft groove. A first limiting groove is provided on the outside of the first driven rod, and a first limiting protrusion is provided in the shaft groove corresponding to the first limiting groove. A second bevel gear is linked to the first driven rod, and the second bevel gear meshes with the first bevel gear. A first through hole is horizontally provided at the upper end of the glue dispensing tube, and a third bevel gear is rotatably installed in the first through hole. The third bevel gear is linked to the first driven rod. A second through hole is vertically opened in the glue dispensing tube, and a fourth bevel gear is rotatably installed in the second through hole. The fourth bevel gear is linked to the upper end of the screw, and the fourth bevel gear meshes with the third bevel gear.

4. The end face adhesive applicator for oil pan mounting according to claim 2, characterized in that: The transmission assembly includes a one-way transmission structure, which includes a second driven rod horizontally disposed inside the glue dispensing bracket, an outer ratchet mounted on the right end of the second driven rod, a third driven rod coaxially disposed on the right side of the second driven rod, and an inner ratchet mounted on the left end of the third driven rod and meshing with the outer ratchet. The outer ratchet is linked with the second driven rod, and the inner ratchet is linked with the third driven rod. The transmission assembly further includes a first bevel gear, which is linked to the upper end of the drive rod. A second shaft groove is horizontally provided inside the glue dispensing bracket. The second driven rod is rotatably installed in the shaft groove. A second limiting groove is provided on the outer side of the second driven rod, and a second limiting protrusion is provided in the shaft groove corresponding to the second limiting groove. A third limiting groove is provided on the outer side of the third driven rod, and a third limiting protrusion is provided in the glue dispensing bracket corresponding to the third limiting groove. A clutch spring is sleeved on the outer side of the third driven rod. The right end of the inner ratchet abuts against the clutch spring, and the end of the clutch spring away from the inner ratchet abuts against the third limiting protrusion. The second driven rod is linked to a second bevel gear, which meshes with the first bevel gear. A horizontal first through hole is opened at the upper end of the glue dispensing tube. A third bevel gear is rotatably installed in the first through hole, and the third driven rod is linked with the third bevel gear. A vertical second through hole is opened in the glue dispensing tube, and a fourth bevel gear is rotatably installed in the second through hole. The fourth bevel gear is linked to the upper end of the screw, and meshes with the third bevel gear.

5. The end face adhesive applicator for oil pan mounting according to claim 4, characterized in that: The right end of the second driven lever is provided with a second limiting stop to prevent the outer ratchet from disengaging from the second driven lever. The glue dispensing bracket is hinged with a clutch switch. The clutch switch includes an operating part that is partially exposed on the outside of the glue dispensing bracket and a pawl that is linked to the inner ratchet. Moving the operating part can cause the pawl to drive the inner ratchet to separate from the outer ratchet.

6. The end face adhesive applicator for oil pan mounting according to any one of claims 2-5, characterized in that: The glue-applying tube has a graduated groove on one side, and graduated lines are provided on both sides of the graduated groove on the glue-applying tube. A float is fixed to the piston component facing the graduated groove, and one end of the float protrudes from the graduated groove.

7. The end face adhesive applicator for oil pan mounting according to claim 6, characterized in that: The two sides of the upper end of the glue dispensing bracket extend outward to form a first guide protrusion. The frame is provided with a first guide groove on the side near the glue dispensing bracket corresponding to the first guide protrusion. The first guide protrusion is installed in the first guide groove and can slide along the first guide groove.

8. The end face adhesive applicator for oil pan mounting according to claim 7, characterized in that: The reset assembly includes a reset shaft mounted on the glue dispensing bracket and a reset hole on the frame corresponding to the reset shaft. A reset spring is sleeved on the outside of the reset shaft, with one end of the reset spring abutting against the frame and the other end of the reset spring abutting against the glue dispensing bracket.

9. The end face adhesive applicator for oil pan mounting according to claim 8, characterized in that: The glue dispensing assembly includes a glue distance adjustment structure for adjusting the distance between the glue dispensing tube and the movable guide. The glue distance adjustment structure includes an adjustment groove on the side of the glue dispensing bracket and an adjustment knob for locking the glue dispensing tube onto the glue dispensing bracket. The adjustment knob passes through the adjustment groove and is installed at the upper end of the glue dispensing tube. When the adjustment knob is released, the glue dispensing tube can slide on the glue dispensing bracket. The two sides of the upper end of the glue dispensing tube extend outward to form a second guide protrusion. The glue dispensing bracket has a second guide groove on the side near the glue dispensing tube corresponding to the second guide protrusion. The second guide protrusion is installed in the second guide groove and can slide along the second guide groove.

10. The end face adhesive applicator for oil pan mounting according to any one of claims 7-9, characterized in that: The lower left side of the frame is provided with a handle for gripping, and the lower end of the handle is provided with a connecting seat. The upper ends of the left and right positioning parts are fixed to the frame, and the lower ends of the left and right positioning parts are fixed to the connecting seat.

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