Quick-change press head installation structure

Abstract

The present invention belongs to the technical field of press-fitting devices, and relates to a quick-change press-fitting head installation structure, including a fixed part and a replacement part, wherein the fixed part includes an upright back plate, a seat plate that can bounce vertically on the front of the back plate, and a fixed cylinder upright below the seat plate, wherein the lower part of the fixed cylinder is provided with two spiral grooves in a double helix structure, and the inner end of the spiral groove is provided with a downwardly extending fixed groove, and the replacement part includes a pressure rod inserted into the fixed cylinder, a chuck head hung at the bottom of the pressure rod, a fixed pin horizontally inserted into the upper part of the pressure rod, and a compression spring sleeved outside the pressure rod and supported between the fixed cylinder and the chuck head, wherein the two ends of the fixed pin can slide into the fixed groove along their respective spiral grooves. The present invention utilizes the coordinated installation of the fixed pin and the spiral groove, which is fast and firm, and is not easy to wear during press-fitting.

Description

Technical Field

[0001] The invention relates to the technical field of press-fitting devices, and in particular to a quick-change press-fitting head installation structure. Background Art

[0002] Rivets are often pressed into place in some assembled products. Pressing requires strong pressing force to push the clamped rivet into the hole, and even interference fit may be used. Therefore, during press-fitting, the press-fitting head may be greatly worn and needs to be replaced frequently. In the past, press-fitting heads were often difficult to replace, or the seat body was easily damaged due to precision problems.

[0003] Therefore, it is necessary to design a new press-fit head and mounting structure to solve this problem. Summary of the invention

[0004] The main purpose of the present invention is to provide a quick-change press-fit head installation structure, which can quickly install the press-fit head and is not easy to wear.

[0005] The present invention achieves the above-mentioned purpose through the following technical scheme: a quick-change press head installation structure, including a fixed part and a replacement part, the fixed part includes an upright back plate, a seat plate that can vertically bounce on the front of the back plate, and a fixed cylinder upright under the seat plate, the lower part of the fixed cylinder is provided with two spiral grooves in a double helix structure, the inner end of the spiral groove is provided with a fixing groove extending downward, the replacement part includes a pressure rod passed through the fixed cylinder, a clamping head suspended at the bottom of the pressure rod, a fixing pin horizontally passed through the upper part of the pressure rod, and a compression spring sleeved outside the pressure rod and supported between the fixed cylinder and the clamping head, and the two ends of the fixing pin can respectively slide into the fixing groove along their respective spiral grooves.

[0006] Specifically, a washer in contact with the bottom of the fixing cylinder is provided above the compression spring.

[0007] Specifically, a nail-shaped contact column is passed through the upper part of the fixing tube, and the lower part of the contact column abuts against the upper end of the pressure rod.

[0008] Specifically, a waist-shaped groove extending vertically is provided on the side of the pressure rod, and the clamping head is limited to the lower part of the pressure rod by a screw which is laterally inserted into the waist-shaped groove.

[0009] Specifically, a pair of vertical slide rails are provided on the front of the back plate, and the seat plate slides along the vertical slide rails. A support plate is also provided under the back plate, and a limit column passing through the support plate is vertically provided under the seat plate. A return spring is provided on the outer sleeve of the limit column to support between the seat plate and the support plate. A limit block that can block the seat plate is provided above the back plate.

[0010] Furthermore, guard plates extending to the sides of the clamping head are provided on both sides of the support plate.

[0011] Furthermore, a sensing device is provided on the guard plate.

[0012] Specifically, the chuck is hollow and has an air inlet on the side wall. The chuck also has a plurality of storage cavities connected to the hollow part evenly distributed around the axis. A pneumatic block is provided in each storage cavity. The outer walls of the pneumatic block and the chuck are provided with two concave circles. The pneumatic block is limited to the outer periphery of the chuck by a retaining spring that is clamped into the concave circle.

[0013] Furthermore, a protrusion is provided on the inner side of the pneumatic block, and a notch matching the protrusion is provided in the receiving cavity.

[0014] By adopting the above technical solution, the beneficial effects of the technical solution of the present invention are:

[0015] The invention utilizes the matching installation of the fixing pin and the spiral groove, which is fast and firm and is not easy to wear during press installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A three-dimensional diagram of the installation structure of the quick-change press head of the embodiment;

[0017] Figure 2 A cross-sectional view of the quick-change press head installation structure of the embodiment;

[0018] Figure 3 is a three-dimensional diagram of a fixed cylinder;

[0019] Figure 4 is a three-dimensional diagram of the pressure rod;

[0020] Figure 5 A three-dimensional diagram of the chuck;

[0021] Figure 6 A three-dimensional diagram of the pneumatic block.

[0022] The numbers in the figure represent:

[0023] 1-fixed part, 11-back plate, 111-vertical slide rail, 112-support plate, 113-guard plate, 114-sensing device, 115-limiting block, 12-base plate, 121-limiting column, 13-fixing cylinder, 131-spiral groove, 132-fixing groove, 14-reset spring, 15-contact column;

[0024] 2-replacement part, 21-pressure rod, 211-fixing pin, 212-waist groove, 22-chuck, 221-air inlet, 222-storage cavity, 23-compression spring, 24-washer, 25-screw, 26-pneumatic block, 261-protrusion, 27-circlip. DETAILED DESCRIPTION

[0025] The present invention is further described in detail below with reference to specific embodiments.

[0026] Example:

[0027] like Figures 1 to 4 As shown, a quick-change press head installation structure of the present invention includes a fixed part 1 and a replacement part 2, the fixed part 1 includes an upright back plate 11, a seat plate 12 that can vertically bounce on the front of the back plate 11 and a fixed cylinder 13 upright below the seat plate 12, the lower part of the fixed cylinder 13 is provided with two spiral grooves 131 in a double helix structure, the inner end of the spiral groove 131 is provided with a downwardly extending fixed groove 132, the replacement part 2 includes a pressure rod 21 passed through the fixed cylinder 13, a clamping head 22 suspended at the bottom of the pressure rod 21, a fixing pin 211 horizontally passed through the upper part of the pressure rod 21 and a compression spring 23 sleeved on the outside of the pressure rod 21 and supported between the fixed cylinder 13 and the clamping head 22, the two ends of the fixing pin 211 can respectively slide into the fixing groove 132 along their respective spiral grooves 131. During installation, the fixing pin 211 is first fixed on the top of the pressure rod 21, and the upper end of the compression spring 23 is located below the fixing pin 211; then the upper end of the pressure rod 21 is inserted into the fixed cylinder 13, and the fixing pin 211 rotates inward along the spiral groove 131, and the compression spring 23 is gradually compressed by the lower end of the fixed cylinder 13 until the fixing pin 211 is stuck in the fixing groove 132, and the elastic part of the compression spring 23 is released, and the fixing is completed. In this way, without being subjected to external force from below, the replacement part 2 will be fixed below the fixed cylinder 13, unless the compression spring 23 is pressed first and then the pressure rod 21 is rotated to remove it. During operation, the rivet is penetrated in the middle of the clamping head 22, and the outside of the clamping head 22 supports the pressed component tightly, and then the upper end of the pressure rod 21 is stressed, and the fixing pin 211 is still firmly stuck in the fixing groove 132. At this time, the seat plate 12 moves downward, the clamping head 22 does not move, and the pressure rod 21 rivets the rivet into place, and then the pressure rod 21 is released, and the compression spring 23 and the reset spring 14 are reset together. Therefore, the present invention utilizes the matching installation of the fixing pin 211 and the spiral groove 131, which is fast and firm, and is not easily worn during press-fitting.

[0028] like Figure 1 and Figure 2 As shown, a washer 24 is provided above the compression spring 23 to contact the bottom of the fixing tube 13. If the top of the compression spring 23 directly contacts the fixing tube 13, scratches will be left on the bottom of the fixing tube 13. Because the washer 23 and the fixing tube 13 are in surface contact, the washer 23 can make the fixing tube 13 more difficult to wear, thereby ensuring the service life of the fixing part 1.

[0029] like Figure 1 and Figure 2As shown, a nail-shaped contact column 15 is provided through the upper part of the fixing cylinder 13, and the lower part of the contact column 15 abuts against the upper end of the pressing rod 21. When the pressing mechanism hits the pressing rod 21, it will be connected through the contact column 15, and the wide part of the contact column 15 will contact the upper surface of the seat plate 12, so that part of the force can be transferred to the seat plate 12 first instead of acting completely on the pressing rod 21, thereby protecting the fixing pin 211.

[0030] like Figure 1 , Figure 2 and Figure 4 As shown, a waist-shaped groove 212 extending vertically is provided on the side of the pressing rod 21, and the clamping head 22 is limited to the lower part of the pressing rod 21 by a screw 25 which is laterally inserted into the waist-shaped groove 212. In this way, the clamping head 22 can only move within a certain height range relative to the pressing rod 21 to ensure that it will not fall.

[0031] like Figure 1 and Figure 2 As shown, a pair of vertical slide rails 111 are provided on the front of the back plate 11, the seat plate 12 slides along the vertical slide rails 111, a support plate 112 is further provided below the back plate 11, a limit column 121 passing through the support plate 112 is vertically provided below the seat plate 12, a return spring 14 is provided on the limit column 121 to abut between the seat plate 12 and the support plate 112, and a limit block 115 is provided above the back plate 11 to block the seat plate 12. This structure allows the seat plate 12 to slide smoothly under low wear conditions, and the height range is limited.

[0032] like Figure 1 and Figure 2 As shown, the two sides of the support plate 112 are provided with guard plates 113 extending to the side of the clamping head 22, and the guard plates 113 are provided with sensing devices 114. The guard plates 113 are used to prevent foreign objects from approaching the clamping head 22, and the sensing devices 114 are used to sense whether the clamping head 22 has a clamping component.

[0033] like Figure 1 , Figure 2 , Figure 5 and Figure 6 As shown, the chuck 22 is hollow and has an air inlet 221 on the side wall. The chuck 22 also has multiple receiving cavities 222 evenly distributed around the axis and connected to the hollow part. Each receiving cavity 222 is provided with a pneumatic block 26. The pneumatic block 26 and the outer wall of the chuck 22 are provided with two concave circles (not marked). The pneumatic block 26 is limited to the outer periphery of the chuck 22 by the retaining spring 27 that is clamped into the concave circle. The chuck 22 uses the internal air pressure to increase the pneumatic block 26 to expand and clamp the parts.

[0034] like Figure 5 and Figure 6As shown, a protrusion 261 is provided on the inner side of the pneumatic block 26, and a notch 223 is provided in the receiving cavity 222 to match the protrusion 261. The cooperation between the protrusion 261 and the notch 223 allows the pneumatic block 26 to move only in the radial direction, ensuring that the clamping is not loose.

[0035] The above are only some embodiments of the present invention. For those skilled in the art, several modifications and improvements can be made without departing from the creative concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A quick-change press-fit head installation structure, characterized in that: The cam is an angular channel that is fixedly secured to the bottom of the frame and has a camming mechanism that allows the cam to move freely in the space between the legs of the operator and the frame. The cam is configured to have a plurality of camming mechanisms that are adapted to move the camming mechanisms upwards and downwards, and the cams are configured to move the cams upwards and downwards.

2. The quick-change press head installation structure according to claim 1, characterized in that: A washer in contact with the bottom of the fixing tube is arranged above the compression spring.

3. The quick-change press head installation structure according to claim 1, characterized in that: A waist-shaped groove extending vertically is arranged on the side of the pressure rod, and the clamping head is limited to the lower part of the pressure rod by a screw which penetrates into the waist-shaped groove transversely.

4. The quick-change press head installation structure according to claim 1, characterized in that: A pair of vertical slide rails are provided on the front of the back plate, and the seat plate slides along the vertical slide rails. A support plate is also provided under the back plate, and a limit column passing through the support plate is vertically provided under the seat plate. A return spring is provided on the outer sleeve of the limit column to support between the seat plate and the support plate. A limit block that can block the seat plate is provided above the back plate.

5. The quick-change press head installation structure according to claim 4, characterized in that: Guard plates extending to the sides of the clamping head are provided on both sides of the support plate.

6. The quick-change press head installation structure according to claim 5, characterized in that: The guard plate is provided with a sensing device facing the clamping head.

7. The quick-change press head installation structure according to claim 1, characterized in that: The chuck is hollow and has an air inlet on its side wall. The chuck is also evenly distributed around the axis with a plurality of receiving cavities connected to the hollow part. A pneumatic block is provided in each receiving cavity. The outer walls of the pneumatic block and the chuck are provided with two concave circles. The pneumatic block is limited to the outer periphery of the chuck by a retaining spring that is clamped into the concave circle.

8. The quick-change press head installation structure according to claim 7, characterized in that: A protrusion is provided on the inner side of the pneumatic block, and a notch matching the protrusion is provided in the receiving cavity.

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