Tailgate spring press

Abstract

The application discloses a tail gate spring strong pressing equipment, and aims to provide a tail gate spring strong pressing equipment which is not only suitable for cold strong pressing process, can press the tail gate spring after heat treatment for a specified time, but also suitable for hot strong pressing process, can complete the strong pressing of the tail gate spring before heat treatment, and can keep the tail gate spring in a compressed state, and is convenient to operate, and is beneficial to improving production efficiency. The tail gate spring strong pressing equipment comprises a rack and a strong pressing station arranged on the rack. The strong pressing station comprises a strong pressing driving mechanism, the strong pressing driving mechanism comprises a strong pressing push block and a driving execution mechanism for driving the strong pressing push block to move; a strong pressing rod, the strong pressing rod comprises a strong pressing base rod and a movable strong pressing rod which are coaxially arranged; a locking pin which is used for cooperating with a bolt hole; a strong pressing rod limiting mechanism, the strong pressing rod limiting mechanism comprises a strong pressing rod top sleeve and a top sleeve moving mechanism, and the top sleeve moving mechanism is used for driving the strong pressing rod top sleeve to move.

Description

Technical Field

[0001] This invention relates to the field of spring manufacturing, specifically to a tailgate spring pressurization device. Background Technology

[0002] Currently, tailgate spring compression processes are divided into cold compression and hot compression. Cold compression involves heating the tailgate spring in a tempering furnace under natural conditions, then subjecting it to compression and holding the pressure for a specified time. Hot compression involves pre-compressing the tailgate spring, placing it in a compressed state in a tempering furnace, and then allowing it to unfurl after natural cooling. Of these two compression processes, cold compression is easier to develop and produces faster, but it has a shorter fatigue life. Hot compression results in lower fatigue decay and a longer fatigue life compared to cold compression, but it is less efficient due to the need for the spring to be heated in a compressed state in the furnace. Summary of the Invention

[0003] The purpose of this invention is to provide a tailgate spring pressurizing device that is not only suitable for cold pressurizing process to press the heat-treated tailgate spring and hold the pressure for a specified time; but also suitable for hot pressurizing process to press the tailgate spring before heat treatment and keep the tailgate spring in a compressed state. It is easy to operate and helps to improve production efficiency.

[0004] The technical solution of this invention is:

[0005] A tailgate spring pressurization device includes a frame and a pressurization station mounted on the frame, wherein the pressurization station includes:

[0006] A high-pressure drive mechanism, comprising a high-pressure push block and a drive actuator for driving the high-pressure push block to move;

[0007] The strong pressure rod includes a coaxially distributed strong pressure base rod and a movable strong pressure rod. One end of the strong pressure base rod is rotatably mounted on the frame, and the other end of the strong pressure base rod is connected to one end of the movable strong pressure rod through a plug-in structure. The movable strong pressure rod can be separated from the strong pressure base rod. The movable strong pressure rod is provided with a spring stop and several pin holes distributed sequentially along the axial direction of the movable strong pressure rod. Each pin hole is located on the same side of the spring stop as the strong pressure base rod.

[0008] Locking pin, used to engage with the pin hole;

[0009] A strong pressure bar limiting mechanism includes a strong pressure bar top sleeve and a top sleeve moving mechanism. The top sleeve moving mechanism is used to drive the strong pressure bar top sleeve to move so that the strong pressure bar top sleeve is sleeved on one end of the movable strong pressure bar or to separate the strong pressure bar top sleeve from the movable strong pressure bar.

[0010] When the top sleeve of the pressure rod is fitted onto one end of the movable pressure rod, the movement direction of the pressure rod and the pressure push block is parallel, and the pressure push block and the pressure base rod are located on the same side of the spring stop. This tailgate spring pressure device is suitable not only for cold pressure processes, applying pressure to the heat-treated tailgate spring and holding it for a specified time; but also for hot pressure processes, completing the pressure application before heat treatment and keeping the tailgate spring compressed. After heat treatment, it allows for the decompression and free unfolding of the tailgate spring. It is easy to operate and improves production efficiency.

[0011] Preferably, the plug-in structure includes a plug-in hole and a plug-in shaft, with one of the plug-in hole and the plug-in shaft located at the other end of the high-pressure base rod, and the other plug-in hole and the plug-in shaft located at one end of the movable high-pressure rod. This plug-in structure is simple in structure, and the plugging and disengaging operations of the high-pressure base rod and the movable high-pressure rod are convenient.

[0012] Preferably, the plug-in structure also includes a slot and a plug, one of which is located at the other end of the high-pressure base rod, and the other is located at one end of the movable high-pressure rod. Thus, after the high-pressure base rod and the movable high-pressure rod are connected by the plug-in structure, the high-pressure base rod and the movable high-pressure rod will not rotate relative to each other, keeping the pin hole in the designated position and facilitating the engagement of the locking pin and the pin hole.

[0013] Preferably, the top sleeve of the pressure lever is open at one end facing the pressure lever, and closed at the other end. The top sleeve moving mechanism is a moving cylinder, the piston rod of which is connected to the top sleeve of the pressure lever, and a pressure sensor is provided between the piston rod of the moving cylinder and the top sleeve of the pressure lever. Thus, the pressure on the tailgate spring during compression can be detected by the pressure sensor.

[0014] Preferably, the high-pressure push block is provided with a high-pressure rod passage. When the top sleeve of the high-pressure rod is fitted onto one end of the movable high-pressure rod, the high-pressure rod passes through the high-pressure rod passage. This helps to improve the compressive stability of the tailgate spring during the high-pressure push block's application of pressure, and prevents the tailgate spring from tilting.

[0015] Preferably, the pressure bar is also equipped with two spring support pads, each with a through hole for the pressure bar. The pressure bar passes through these holes sequentially, allowing the spring support pads to slide along the pressure bar. The pressure bar is perpendicular to the spring support pads, and the two spring support pads are located on the same side of the spring stop block. This further improves the compressive stability of the tailgate spring during the pressure exerted by the pressure push block, preventing the tailgate spring from tilting.

[0016] Preferably, the spring stop is fixed to the movable pressure rod by bolts. This allows the position of the spring stop on the movable pressure rod to be adjusted as needed.

[0017] Preferably, the high-pressure station further includes a limiting end seat, which is mounted on the frame and located near the top sleeve of the high-pressure rod. The limiting end seat has a high-pressure rod limiting groove for limiting the high-pressure rod. When the high-pressure rod is located within the high-pressure rod limiting groove and abuts against its inner wall, the high-pressure rod and the high-pressure rod top sleeve are coaxially distributed, and the high-pressure rod top sleeve, the limiting end seat, the spring stop, and the high-pressure push block are sequentially distributed along the axial direction of the high-pressure rod. This facilitates actual operation.

[0018] Preferably, the high-pressure drive mechanism further includes a guide rail mounted on the frame and a slide block that slides along the guide rail, with the high-pressure push block mounted on the slide block.

[0019] Preferably, the drive actuator includes a lead screw rotatably mounted on the frame, a drive motor for driving the lead screw to rotate, and a drive nut that cooperates with the lead screw. The lead screw is parallel to the guide rail, and the drive nut is connected to the slide.

[0020] The beneficial effects of this invention are: it is not only applicable to the cold pressing process for pressing the heat-treated tailgate spring and holding the pressure for a specified time; but also applicable to the hot pressing process for pressing the tailgate spring before heat treatment and keeping the tailgate spring in a compressed state. It is easy to operate and helps to improve production efficiency. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural schematic diagram of the tailgate spring strong pressure device of the present invention.

[0022] Figure 2 This is a front view of the tailgate spring forced compression device of the present invention.

[0023] Figure 3 yes Figure 1 A magnified view of a portion of point A in the middle.

[0024] Figure 4 This is a partial structural diagram of the movable strong pressure rod of the tailgate spring strong pressure device of the present invention.

[0025] In the picture:

[0026] High-pressure drive mechanism 1, high-pressure push block 1.1, drive motor 1.2, slide block 1.3, lead screw 1.4, guide rail 1.5, high-pressure rod through-hole 1.6;

[0027] 2. Strong pressure rod, 2.0 shaft, 2.1 strong pressure base rod, 2.2 movable strong pressure rod, 2.3 plug-in structure, 2.31 plug-in shaft, 2.32 plug block, 2.4 pin hole, 2.5 spring stop;

[0028] The high-pressure rod limiting mechanism 3, the high-pressure rod top sleeve 3.1, the moving cylinder 3.2, and the pressure sensor 3.3;

[0029] Limiting end seat 4, strong pressure rod limiting groove 4.1;

[0030] Spring support pad 5. Detailed Implementation

[0031] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0032] Specific Implementation Example 1: As shown in the example Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, a tailgate spring pressurization device includes a frame and a pressurization station mounted on the frame. The pressurization station includes a pressurization drive mechanism 1, a pressurization rod 2, a locking pin, a limit end seat 4, and a pressurization rod limit mechanism 3.

[0033] The high-pressure drive mechanism 1 includes a high-pressure push block 1.1 and a drive actuator for moving the high-pressure push block. Specifically, the high-pressure drive mechanism also includes a guide rail 1.5 mounted on the frame and a slide block 1.3 sliding along the guide rail, which is vertically distributed. The high-pressure push block is mounted on the slide block by bolts.

[0034] The pressure bar 2 includes a coaxially distributed pressure base bar 2.1 and a movable pressure bar 2.2. The movable pressure bar is located above the pressure base bar. The lower end of the pressure base bar is rotatably mounted on the frame via a shaft 2.0. The upper end of the pressure base bar and the lower end of the movable pressure bar are connected via a plug-in structure 2.3, and the movable pressure bar can be separated from the pressure base bar. The plug-in structure includes a plug-in hole and a plug-in shaft 2.31. One of the plug-in hole and the plug-in shaft is located at the upper end of the pressure base bar, and the other is located at the lower end of the movable pressure bar. In this embodiment, the plug-in hole is located at the upper end of the pressure base bar and is coaxially distributed with the pressure base bar; the plug-in shaft is located at the lower end of the movable pressure bar and is coaxially distributed with the movable pressure bar. The movable pressure bar is provided with a spring stop 2.5 and several pin holes 2.4 sequentially distributed along the axial direction of the movable pressure bar. Each pin hole is located on the same side of the spring stop as the pressure base rod. The pin holes extend radially along the movable pressure rod and pass through the opposite sides of the movable pressure rod.

[0035] The locking pin engages with either of the pin holes. The strong pressure rod also has two spring support pads 5, each with a through hole for the strong pressure rod. The strong pressure rod passes through these holes, allowing the spring support pads to slide along it. The strong pressure rod is perpendicular to the spring support pads. The two spring support pads are located on the same side of the spring stop. When the movable strong pressure rod is removed from the strong pressure base rod, the spring support pads can be removed from the strong pressure rod.

[0036] The pressure rod limiting mechanism 3 includes a pressure rod top sleeve 3.1 and a top sleeve moving mechanism. The top sleeve moving mechanism is used to drive the pressure rod top sleeve to move, so that the pressure rod top sleeve is fitted onto the upper end of the movable pressure rod or to separate the pressure rod top sleeve from the movable pressure rod. In this embodiment, the end of the pressure rod top sleeve facing the pressure rod is open, and the other end of the pressure rod top sleeve is closed (i.e., the lower end of the pressure rod top sleeve is open, and the upper end of the pressure rod top sleeve is closed). The top sleeve moving mechanism is a moving cylinder 3.2 mounted on the frame. The moving cylinder is vertically distributed. The piston rod of the moving cylinder is connected to the pressure rod top sleeve, and a pressure sensor 3.3 is provided between the piston rod of the moving cylinder and the pressure rod top sleeve.

[0037] The limiting end seat 4 is mounted on the frame and is located near the top sleeve of the strong pressure rod. The limiting end seat has a strong pressure rod limiting groove 4.1 for limiting the strong pressure rod. The strong pressure rod can rotate around the shaft to position itself within the strong pressure rod limiting groove. When the strong pressure rod is located within the strong pressure rod limiting groove and abuts against its inner wall, the strong pressure rod and the top sleeve are coaxially distributed, the strong pressure rod is parallel to the guide rail, and the top sleeve, limiting end seat, spring stop, and strong pressure push block are sequentially distributed from top to bottom along the axial direction of the strong pressure rod. The movable strong pressure rod is located between the top sleeve and the strong pressure base rod.

[0038] When the top sleeve of the strong pressure rod is fitted onto one end of the movable strong pressure rod, the moving direction of the strong pressure rod and the strong pressure push block are parallel, and the strong pressure push block and the strong pressure base rod are located on the same side of the spring stop block.

[0039] The specific use of the tailgate spring compression device in this embodiment is as follows.

[0040] First, remove the movable strong pressure rod from the strong pressure base rod and put the tailgate spring on the strong pressure base rod; then, connect the movable strong pressure rod to the strong pressure base rod through the plug-in structure, so that the tailgate spring is put on the movable strong pressure rod. The tailgate spring is located between the two spring support pads, and the tailgate spring and the two spring support pads are both located below the spring stop.

[0041] Next, move the tailgate spring and the two spring support pads upward so that the tailgate spring and the two spring support pads are both above the strong pressure push block; then, rotate the strong pressure rod so that the strong pressure rod is located in the strong pressure rod limiting groove and abuts against the inner wall of the strong pressure rod limiting groove. At this time, the strong pressure rod is vertically distributed.

[0042] Next, release the tailgate spring and the two spring support pads, so that the release tailgate spring and spring support pads are supported on the high-pressure push block, with the lower spring support pad pressing against the high-pressure push block.

[0043] The top sleeve moving mechanism drives the top sleeve of the strong pressure rod to move downward, so that the top sleeve of the strong pressure rod is fitted onto the upper end of the movable strong pressure rod; at this time, there is a gap between the upper end of the movable strong pressure rod and the inner top surface of the top sleeve of the strong pressure rod.

[0044] Second, the drive actuator moves the slide and the high-pressure push block upwards. During this process, the high-pressure push block moves the tailgate spring and the two spring support pads upwards together. When one of the upper spring support pads abuts against the spring stop, the high-pressure push block and the tailgate spring push the movable high-pressure rod upwards until the upper end of the movable high-pressure rod abuts against the inner top surface of the high-pressure rod top sleeve. At this point, the movable high-pressure rod stops moving. Then, the drive actuator continues to move the slide and the high-pressure push block upwards, thereby applying high pressure to the tailgate spring through the high-pressure push block, and the pressure sensor detects the pressure on the tailgate spring. When the pressure sensor detects that the pressure on the tailgate spring reaches the set value, the drive actuator stops working, and the slide and the high-pressure push block stop moving upwards.

[0045] Next, the locking pin is inserted into a pin hole located below and adjacent to the tailgate spring; then, the drive actuator moves the slide and the strong pressure push block down into place. During this process, a spring support pad located below will press against the locking pin, thereby installing the tailgate spring on the movable strong pressure rod and keeping the tailgate spring in a compressed state.

[0046] Third, the top sleeve moving mechanism drives the top sleeve of the pressure rod to move upward, separating the top sleeve from the movable pressure rod; then, the pressure rod is rotated to separate it from the pressure rod limiting groove; next, the movable pressure rod is removed from the pressure base rod. This completes the installation of the tailgate spring on the movable pressure rod, keeping it in a compressed state. For cold pressure pressing, this allows for the pressure process on the heat-treated tailgate spring, with a specified pressure holding time. For hot pressure pressing, the movable pressure rod and the tailgate spring can be placed in a tempering furnace for heating. After heating and natural cooling, the locking pin can be pulled out to decompress and freely unfold the tailgate spring. This operation is convenient and improves production efficiency.

[0047] Specifically, such as Figure 1 , Figure 2 As shown, in the same high-pressure station, there are one or more high-pressure rods 2. In this embodiment, there are two high-pressure rods in the same high-pressure station. In the same high-pressure station, the high-pressure push block corresponds to the high-pressure rod, the high-pressure rod limiting groove on the limiting end seat corresponds to the high-pressure rod, and the high-pressure rod limiting mechanism corresponds to the high-pressure rod.

[0048] There are one or more high-pressure stations. In this embodiment, there are two high-pressure stations, and the two high-pressure stations are arranged side by side.

[0049] Furthermore, such as Figure 1 , Figure 4 As shown, the plug-in structure 2.3 also includes a slot and a plug block 2.32. One of the slot and the plug block is located at the upper end of the strong pressure base rod, and the other is located at the lower end of the movable strong pressure rod. In this embodiment, the slot is located at the upper end of the strong pressure base rod, and the plug block is located at the lower end of the movable strong pressure rod. Thus, after the strong pressure base rod and the movable strong pressure rod are connected through the plug-in structure, the strong pressure base rod and the movable strong pressure rod will not rotate relative to each other, keeping the pin hole in the designated position, facilitating the engagement of the locking pin and the pin hole.

[0050] Furthermore, such as Figure 1 , Figure 3 As shown, the strong pressure push block 1.1 is provided with a strong pressure rod passage 1.6. When the top sleeve of the strong pressure rod is fitted onto one end of the movable strong pressure rod, the strong pressure rod passes through the strong pressure rod passage. This helps to improve the compressive stability of the tailgate spring during the strong pressure push block's application of strong pressure, and prevents the tailgate spring from tilting.

[0051] Furthermore, such as Figure 1As shown, the spring stop is fixed to the movable pressure rod by bolts. This allows the position of the spring stop on the movable pressure rod to be adjusted as needed. In this embodiment, the upper part of the movable pressure rod has several bolt holes, which are distributed sequentially along the axis of the movable pressure rod. The spring stop has axial and radial through holes, which intersect. The movable pressure rod passes through the axial through hole, and the bolt passes through the radial through hole and one of the bolt holes, thereby locking the spring stop onto the movable pressure rod.

[0052] Furthermore, such as Figure 1 , Figure 2 As shown, the drive actuator includes a lead screw 1.4 rotatably mounted on the frame, a drive motor 1.2 for driving the lead screw to rotate, and a drive nut that cooperates with the lead screw. The lead screw is parallel to the guide rail, and the drive nut is connected to the slide. Thus, the slide can be driven to move along the guide rail using the cooperation of the lead screw and the drive nut, and the slide movement accuracy is high.

[0053] In this embodiment, the frame is also equipped with an initial position sensor, a lower sensor, an upper sensor, and a positioning sensor arranged sequentially from bottom to top along the guide rail. The lower sensor is located near the initial position sensor, and the upper sensor is located near the positioning sensor. All four sensors—initial position, lower, upper, and positioning—are used to sense the slide block. In this embodiment, all four sensors are proximity sensors. Thus, the position of the slide block can be sensed by the sensors. During the upward movement of the slide block and the pressure pusher block by the drive actuator, the slide block and pressure pusher block can be moved upward quickly initially. When the upper sensor senses the slide block, the slide block and pressure pusher block decelerate and then move upward at a low speed to their designated positions, thereby improving the pressure efficiency and accuracy of the tailgate spring. Similarly, during the downward movement of the slide block and pressure pusher block by the drive actuator, the slide block and pressure pusher block can be moved downward quickly initially. When the lower sensor senses the slide block, the slide block and pressure pusher block decelerate and then move downward at a low speed to their designated positions, thereby improving the pressure efficiency of the tailgate spring.

[0054] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Any simple modifications, alterations, and equivalent transformations made to the above embodiments based on the technical essence of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A tailgate spring pressing apparatus comprising a frame and a pressing station arranged on the frame, characterized in that, The strong pressing station comprises: a strong pressing driving mechanism, which comprises a strong pressing push block and a driving execution mechanism for driving the strong pressing push block to move; a strong pressing rod, which comprises a strong pressing base rod and a movable strong pressing rod coaxially arranged, one end of the strong pressing base rod is rotationally arranged on a rack, the other end of the strong pressing base rod is connected with one end of the movable strong pressing rod through a plug-in structure, the movable strong pressing rod can be separated from the strong pressing base rod, a spring block and a plurality of bolt holes arranged along the axial direction of the movable strong pressing rod are arranged on the movable strong pressing rod, and each bolt hole is located on the same side of the strong pressing base rod as the spring block; a locking pin for cooperating with the bolt hole; a strong pressing rod limiting mechanism, which comprises a strong pressing rod top sleeve and a top sleeve moving mechanism, the top sleeve moving mechanism is used for driving the strong pressing rod top sleeve to move, so that the strong pressing rod top sleeve is sleeved on one end of the movable strong pressing rod or the strong pressing rod top sleeve is separated from the movable strong pressing rod; when the strong pressing rod top sleeve is sleeved on one end of the movable strong pressing rod, the strong pressing rod is parallel to the moving direction of the strong pressing push block, and the strong pressing push block is located on the same side of the strong pressing base rod as the spring block.

2. The tailgate spring press apparatus of claim 1, wherein, The plug-in structure comprises a plug-in hole and a plug-in shaft, one of the plug-in hole and the plug-in shaft is arranged on the other end of the strong pressing base rod, and the other of the plug-in hole and the plug-in shaft is arranged on one end of the movable strong pressing rod.

3. The tailgate spring press apparatus of claim 2, wherein: The plug-in structure further comprises a plug-in slot and a plug-in block, one of the plug-in slot and the plug-in block is arranged on the other end of the strong pressing base rod, and the other of the plug-in slot and the plug-in block is arranged on one end of the movable strong pressing rod.

4. The tailgate spring press apparatus of claim 1 or 2 or 3, wherein, One end of the strong pressing rod top sleeve is open towards the strong pressing rod, and the other end of the strong pressing rod top sleeve is closed; the top sleeve moving mechanism is a moving cylinder, a piston rod of the moving cylinder is connected with the strong pressing rod top sleeve, and a pressure sensor is arranged between the piston rod of the moving cylinder and the strong pressing rod top sleeve.

5. The tailgate spring press apparatus of claim 1 or 2 or 3, wherein, The strong pressing push block is provided with a strong pressing rod passing hole, when the strong pressing rod top sleeve is sleeved on one end of the movable strong pressing rod, the strong pressing rod passes through the strong pressing rod passing hole.

6. The tailgate spring press apparatus of claim 1 or 2 or 3, wherein, The strong pressing rod is further provided with two spring support pads, the spring support pads are provided with strong pressing rod passing holes, the strong pressing rod passes through the strong pressing rod passing holes on the two spring support pads in sequence, the spring support pads can slide along the strong pressing rod, the strong pressing rod is perpendicular to the spring support pads, and the two spring support pads are located on the same side of the spring block.

7. The tailgate spring press apparatus of claim 1, 2 or 3, wherein: The spring block is fixed on the movable strong pressing rod through bolts.

8. The tailgate spring press apparatus of claim 1, 2 or 3, wherein: The strong pressing station further comprises a limiting end seat, the limiting end seat is arranged on the rack and is close to the strong pressing rod top sleeve, the limiting end seat is provided with a strong pressing rod limiting groove for limiting the strong pressing rod, when the strong pressing rod is located in the strong pressing rod limiting groove and abuts against the inner wall of the strong pressing rod limiting groove, the strong pressing rod and the strong pressing rod top sleeve are coaxially arranged, and the strong pressing rod top sleeve, the limiting end seat, the spring block and the strong pressing push block are sequentially arranged along the axial direction of the strong pressing rod.

9. The tailgate spring press apparatus of claim 1, 2 or 3, wherein, The strong pressing driving mechanism further comprises a guide rail arranged on the rack and a sliding seat sliding along the guide rail, and the strong pressing push block is arranged on the sliding seat.

10. The tailgate spring press apparatus of claim 9, wherein, The driving execution mechanism comprises a screw rod rotationally arranged on the rack, a driving motor for driving the screw rod to rotate, and a driving nut cooperating with the screw rod, the screw rod is parallel to the guide rail, and the driving nut is connected with the sliding seat.

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