CN205437689U - Automatic pressure equipment spacer pin device - Google Patents

Abstract

The utility model discloses an automatic press-fit limit pin device, which comprises a frame, a block-shaped workbench is fixedly arranged on the upper part of the frame, and a lower positioning tool for positioning workpieces is fixedly arranged on the workbench. The connecting rod is fixedly provided with an upper plate, and a vertically telescopic servo electric cylinder is installed on the upper plate, and the end of the connecting rod of the servo electric cylinder is connected with an upper press-in tooling positioned to be assembled with a limit pin, and the servo electric cylinder pushes The upper press-in tooling of limiting pin is pressed into the positioning pin hole on the workpiece on the lower positioning tooling to complete the press-fitting of limiting pin. The device has a simple structure and solves the problem of difficulty in installing the limit pin. At the same time, it uses electric control equipment and program-controlled electric cylinders to ensure assembly quality, reduce labor intensity of workers, and improve production efficiency.

Description

Automatic press-fit limit pin device

technical field

The utility model belongs to the field of motorcycles, in particular to an automatic press-fitting limit pin device.

Background technique

As shown in Figure 1a and Figure 1b, the limit pin c is required to be press-fitted on our company's products. The function of the limit pin c is to limit the ∮5 steel ball Ia and the spring Ib in a ∮5.2 inclined hole from falling. Since the steel ball Ia and the spring Ib need to be put into the inclined hole first, the spring I will push the steel ball Ia out of the inclined hole without the restriction of the stop pin c. The spring Ib must be installed into the inclined hole first, and then the steel ball Ia is used to compress the spring Ib. This requires the steel ball Ia to be installed in the inclined hole and the limit pin c to be pressed in at the same time to complete the assembly. The technical difficulties of the assembly are as follows: 1. The parts involved in the assembly are relatively small, and it is difficult to do it manually. 2. The limit pin c has an angle with the center line of the inclined hole. 3. The steel ball Ia will be pushed out by the spring Ib before the limit pin c is pressed in. When the steel ball Ia must be assembled, the limit pin c should be pressed in at the same time to prevent the steel ball Ia from falling out.

Utility model content

In order to facilitate the assembly of the above-mentioned limit pins and ensure the assembly quality, the utility model provides an automatic press-fit limit pin device. , the limit pin is assembled on the upper press-in tooling, the workpiece is assembled on the lower positioning tool, and the upper press-in tooling is controlled by the electric cylinder connected to the upper limit tooling to automatically press the limit pin into the positioning pin on the workpiece on the lower limit tooling In the hole, the assembly of the limit pin is realized.

The utility model is realized through the following technical solutions:

The automatic press-fit limit pin device is used to install on the press-fit machine. The press-fit machine is equipped with a servo electric cylinder and a frame. The lower positioning tool is fixed above the frame. The lower positioning tool includes an auxiliary positioning part, a spring seat, Return spring, mounting plate, movable positioning pin, the mounting plate is fixedly arranged above the frame, and the spring seat is fixedly arranged below the mounting plate; the return spring is arranged in the spring seat; the mounting plate The movable locating pin is used to locate the limit pin hole on the workpiece; the movable locating pin is a stepped round pin located in the center of the mounting plate, and the small diameter section of the movable locating pin passes through the mounting plate upwards, The large-diameter section of the movable positioning pin is arranged in the spring hole for accommodating the return spring; the auxiliary positioning part is fixedly arranged above the mounting plate, and the shape of the auxiliary positioning part is designed according to the shape of the workpiece, and the auxiliary positioning part is located at One side of the movable locating pin; the upper end of the return spring is in conflict with the large end surface of the movable locating pin, and the lower end of the return spring is in conflict with the bottom of the spring hole where the return spring is placed in the spring seat;

Four connecting columns of the same height are fixedly arranged above the mounting plate, and the four connecting columns are evenly distributed at the four corners of the mounting plate, and the upper ends of the four connecting columns are fixedly connected to the upper plate; the top of the upper plate is fixedly connected to the Servo electric cylinder, the connecting shaft of the servo electric cylinder is fixedly connected to the upper press-in tooling, and the upper press-in tooling includes a pressure head, a connecting flange, a shell, and a guide sleeve; the connecting shaft of the connecting flange and the servo electric cylinder fixed connection; the lower end of the connecting flange is fixedly connected to the shell, the shell is tubular, and the shell is set on the pressure head and the guide sleeve;

The inner hole of the shell is provided with first-stage holes, second-stage holes, and third-stage holes with decreasing apertures from top to bottom; the inner hole of the shell is sequentially equipped with the pressure head, guide sleeve, spring;

The guide sleeve is tubular and has a positioning shoulder on its outer peripheral surface. The large diameter section of the guide sleeve is arranged in the second-stage hole on the outer shell and is limited by the positioning shoulder. The large diameter section of the guide sleeve can be positioned at the The above-mentioned second-stage hole moves up and down; the small-diameter section of the guide sleeve passes through the lower end surface of the shell, and the inner hole of the guide sleeve is provided with a positioning hole shoulder; the inner hole of the lower end of the guide sleeve is used for assembly. Press-fit limit pin;

The indenter is cylindrical, the upper end of the indenter is provided with a first stepped outer circle, and the lower end of the indenter is provided with a second stepped outer circle; the first stepped outer circle on the indenter is located on the first step of the shell. The hole is located in the shoulder formed by the first-step hole and the second-step hole on the shell; the outer circle of the second step on the indenter penetrates into the inner hole of the guide sleeve, and the outer circle of the second step on the indenter The spring is sheathed on the top; the upper end of the spring conflicts with the shaft shoulder at the upper end of the outer circle of the second step on the pressure head, and the lower end of the spring conflicts with the positioning hole shoulder on the inner hole of the guide sleeve;

The centerline of the pressure head coincides with the centerline of the movable positioning pin.

Further, a load cell is fixedly connected to the bottom of the connecting flange, the load cell is located in the first-stage hole on the housing and contacts the upper end surface of the indenter, and the center line of the load cell is in contact with the upper end surface of the indenter. The centerlines of the connecting shafts on the servo electric cylinders are coincident.

Further, the pipe wall at the lower end of the guide sleeve is axially provided with a gap, and the outer peripheral surface of the pipe wall at the lower end of the guide sleeve is provided with a plurality of steel balls in the circumferential direction. The inner peripheral surface of the casing is provided with a guide groove for sliding the steel ball in the axial direction to prevent the guide sleeve from rotating.

Further, the elastic force of the spring is greater than the elastic force of the return spring during assembly.

The beneficial effects of the utility model:

In the automatic press-fit limit pin device of the utility model, the limit pin to be loaded into the workpiece is loaded into the device, and the upper part is pressed into the upper guide sleeve of the tooling to fasten the limit through the steel wire clip, and the workpiece is installed in the lower positioning tool. The movable positioning pin on the lower positioning tool passes through the positioning pin hole on the workpiece, and the servo electric cylinder is controlled to make the upper pressing tool move up and down in the vertical direction, driving the upper pressing tool to move, so that the limit pin in the guide sleeve and The movable locating pin is in contact, and under the action of the spring force, the movable locating pin is pressed down to press the movable locating pin into the locating pin hole on the workpiece, because steel balls and steel wires are arranged on the outer peripheral surface of the guide sleeve The clamping ring and the guide groove where the steel ball slides are provided in the axial direction on the outer peripheral surface of the shell to prevent the guide sleeve from rotating, and ensure that the limit pin is accurately pressed into the positioning pin hole on the workpiece. The device has a simple structure and solves the problem of difficult installation of the limit pin. At the same time, it uses electric control equipment and program-controlled electric cylinders to ensure assembly quality, reduce labor intensity of workers, and improve production efficiency.

Description of drawings

Fig. 1a is the workpiece of press-fitting limit pin;

Fig. 1b is a J-J direction rotation sectional view of Fig. 1a;

Fig. 2 is a structural schematic diagram of the automatic press-fitting limit pin device installed on the press-fitting machine;

Fig. 3 is the top view of Fig. 2;

Fig. 4 is the B-B case sectional view of Fig. 2;

Fig. 5 is the left view of Fig. 4;

Fig. 6 is a partially enlarged view of A in Fig. 4;

Figure 7 is a front view of the indenter;

Fig. 8 is a sectional view of the shell;

Fig. 9 is a sectional view of the guide sleeve;

FIG. 10 is a partially enlarged view of C in FIG. 2 .

reference sign

1-connecting column; 2-pressure head; 21-the outer circle of the first step; 22-the outer circle of the second step; 3-load sensor; 4-connecting flange; 5-servo electric cylinder; 6-housing; 61- First-order hole; 62-second-order hole; 63-third-order hole; 7-upper plate; 8-steel wire clip; 9-guide sleeve; ;11-auxiliary positioning part; 12-spring seat; 13-return spring; 14-installation plate; 15-movable positioning pin; 16-foot support; 17-frame; 18-steel ball; Ⅰ; b-spring Ⅰ; c-limit pin.

detailed description

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

As shown in Figures 2 to 6, the automatic press-fit limit pin device is controlled by electronic control equipment and control programs. 17. The frame 17 in this embodiment is a cuboid frame of aluminum alloy, and the lower end of the frame 17 is symmetrically fixedly connected to four foot supports 16 to support the frame 17 . A lower positioning tool is fixedly arranged above the frame 17, and the lower positioning tool includes an auxiliary positioning part 11, a spring seat 12, a return spring 13, a mounting plate 14, and a movable positioning pin 15. The mounting plate 14 is rectangular parallelepiped and fixed above the frame 17 , and the spring seat 12 is fixed below the mounting plate 14 . The return spring 13 is arranged in the spring seat 12 . The movable positioning pin 15 is pierced in the mounting plate 14 for positioning the limit pin hole on the workpiece. The movable locating pin 15 is a stepped circular pin located at the center of the mounting plate 14, the small diameter section of the movable locating pin 15 passes through the described mounting plate 14 upwards, and the large diameter section of the movable locating pin 15 is arranged on a place for accommodating the reset. In the spring hole of the spring 13. The auxiliary positioning part 11 is fixedly arranged above the mounting plate 14. The shape of the auxiliary positioning part 11 is designed according to the shape of the workpiece. The auxiliary positioning part 11 is located on one side of the movable positioning pin 15 and is provided with a certain distance. The upper end of the return spring 13 is in conflict with the large end surface of the movable positioning pin 15 , and the lower end of the return spring 13 is in conflict with the bottom of the spring hole where the return spring 13 is placed in the spring seat 12 .

Four connecting columns 1 of equal height are fixedly arranged above the mounting plate 14 , and the four connecting columns 1 are evenly distributed at the four corners of the mounting plate 14 , and the upper ends of the four connecting columns 1 are fixedly connected to the upper plate 7 . The upper part of the upper plate 7 is fixedly connected with the servo electric cylinder 5, and the connecting shaft of the servo electric cylinder 5 is fixedly connected with an upper press-in tooling, and the upper press-in tooling includes a pressure head 2, a connecting flange 4, a casing 6, a guide Set of 9. The connecting flange 4 is fixedly connected to the connecting shaft of the servo electric cylinder 5 . The lower end of the connecting flange 4 is fixedly connected to the casing 6 , which is in the shape of a tube, and the casing 6 is sleeved on the pressure head 2 and the guide sleeve 9 .

As shown in FIG. 8 , the inner hole of the housing 6 is provided with a first-stage hole 61 , a second-stage hole 62 , and a third-stage hole 63 with decreasing diameters from top to bottom. The indenter 2 , the guide sleeve 9 and the spring 19 are sequentially assembled in the inner hole of the housing 6 from top to bottom.

As shown in Figures 9 and 10, the guide sleeve 9 is tubular and its outer peripheral surface is provided with a positioning shoulder 91, and the large-diameter section of the guide sleeve 9 is arranged in the second-stage hole 62 on the outer shell to position the shaft. The shoulder 91 limits the position, and the large-diameter section of the guide sleeve 9 can move up and down in the upper second-stage hole 62 . The small-diameter section of the guide sleeve 9 passes through the lower end surface of the housing 6 , and the inner hole of the guide sleeve 9 is provided with a positioning hole shoulder 92 . The inner hole at the lower end of the guide sleeve 9 is used to assemble the limit pin c to be press-fitted. Optimally, the pipe wall at the lower end of the guide sleeve 9 is provided with a gap 93 in the axial direction, and a plurality of steel balls 18 are arranged on the outer peripheral surface of the pipe wall at the lower end of the guide sleeve 9 in the upper direction, and the steel balls 18 are located above the gap 93. The periphery of the ball 18 is fastened with a steel wire snap ring 8, and the inner peripheral surface of the housing 6 is provided with a guide groove for sliding the steel ball 18 in the axial direction to prevent the guide sleeve 9 from rotating.

As shown in FIG. 7 , the indenter 2 is cylindrical, the upper end of the indenter 2 is provided with a first stepped outer circle 21 , and the lower end of the indenter 2 is provided with a second stepped outer circle 22 . The first stepped outer circle 21 on the indenter is located in the first stepped hole 61 on the casing and is positioned on the shoulder formed by the first stepped hole 61 and the second stepped hole 62 on the casing. The second stepped outer circle 22 on the indenter penetrates into the inner hole of the guide sleeve 9 , and the spring 19 is sheathed on the second stepped outer circle 22 on the indenter. The upper end of the spring 19 is in conflict with the shoulder on the upper end of the second stepped outer circle 22 on the pressure head, and the lower end of the spring 19 is in conflict with the positioning hole shoulder 92 on the inner hole of the guide sleeve. The centerline of the pressing head 2 coincides with the centerline of the movable positioning pin 15 .

Optimally, a load cell 3 is fixedly connected to the bottom of the connecting flange 4, the load cell 3 is located in the first-stage hole 61 on the casing and contacts the upper end surface of the indenter 2, and the load cell 3 The centerline of the force sensor 3 coincides with the centerline of the connecting shaft on the servo electric cylinder 5 .

Optimally, the elastic force of the spring 19 is greater than the elastic force of the return spring 13 during assembly.

The pressing process of the automatic press-fit limit pin device is as follows:

Step 1: Manually install the limit pin c into the guide sleeve 9 of the press-in tooling, and the steel ball 18 fixes the limit pin c in the guide sleeve 9 under the action of the steel wire snap ring 8 . Press the steel ball Ⅰa with the thumbs of both hands to fix the workpiece on the lower positioning tool, and the return spring 13 on the lower positioning tool passes through the positioning pin hole on the workpiece to block the steel ball Ⅰa, and then the thumbs of both hands can be released , fix the workpiece to the lower positioning tooling.

Step 2: start the device, the servo electric cylinder 5 drives the upper press-in tooling as a whole to go down until the limit pin c contacts the movable positioning pin 15, and the movable positioning pin 15 gradually extends into the guide sleeve 9 during this process.

Step 3: The upper press-in tooling continues to move downward as a whole. Because the elastic force of the inner spring 19 of the upper press-in tooling is greater than that of the return spring 13 in the lower positioning tooling, the movable positioning pin 15 retracts downward under the action of pressure. Press the workpiece surface until the lower end surface of the guide sleeve 9.

Step 4: Press up the tooling and continue to move downward. Since the guide sleeve 9 compresses the spring 19 to shrink, the guide sleeve 9 will remain motionless at this time, and the movable positioning pin 15 will continue to retract to the set position under pressure, and the limit pin c Just press into the positioning pin hole on the workpiece to complete the press-fitting of the product.

Step 5: The servo electric cylinder 5 drives the upper pressing tool to rise, the pressure head 2 rises, the guide sleeve 9 presses the workpiece under the reset action of the spring 19 until the pressure head 2 is completely retracted to the position, and then the guide sleeve 9 rises to the position, which can effectively Prevent the workpiece from being lifted upwards and detached from the lower press-in tooling during this process. Press down the movable positioning pin 15 of the frock and bounce under the effect of the back-moving spring 13 . Ready for the next work cycle.

Claims (4)

1. The automatic press-fit limit pin device is used to be installed on the press-fit machine, and the press-fit machine is provided with a frame (17) for support and a servo electric cylinder (5), which is characterized in that: the top of the frame (17) The lower positioning tool is fixedly arranged, and the lower positioning tool includes an auxiliary positioning part (11), a spring seat (12), a return spring (13), a mounting plate (14), a movable positioning pin (15), and the mounting plate (14) Fixedly arranged above the frame (17), the spring seat (12) is fixedly arranged below the mounting plate (14); the return spring (13) is arranged in the spring seat (12); the installation The movable locating pin (15) is used to locate the limit pin hole on the workpiece in the plate (14); The small-diameter section of locating pin (15) passes through described mounting plate (14) upwards, and the large-diameter section of movable locating pin (15) is arranged in the spring hole that accommodates described back-moving spring (13); 14) is fixedly provided with the auxiliary positioning part (11), the shape of the auxiliary positioning part (11) is designed according to the shape of the workpiece, and the auxiliary positioning part (11) is positioned at one side of the movable positioning pin (15); The upper end of the return spring (13) is in conflict with the large end face of the movable positioning pin (15), and the lower end of the return spring (13) is in conflict with the bottom of the spring hole where the return spring (13) is placed in the spring seat (12) ; Four connecting columns (1) of equal height are fixedly arranged above the mounting plate (14), and the four connecting columns (1) are evenly distributed on the four corners of the mounting plate (14), and the upper ends of the four connecting columns (1) The upper plate (7) is fixedly connected; the upper part of the upper plate (7) is fixedly connected with the servo electric cylinder (5), the connecting shaft of the servo electric cylinder (5) is fixedly connected with the upper press-in tooling, and the upper press-in tooling It includes a pressure head (2), a connecting flange (4), a casing (6), and a guide sleeve (9); the connecting flange (4) is fixedly connected to the connecting shaft of the servo electric cylinder (5); the The lower end of the connecting flange (4) is fixedly connected to the casing (6), the casing (6) is tubular, and the casing (6) is set on the pressure head (2) and the guide sleeve (9); The inner hole of the housing (6) is provided with first-order holes (61), second-order holes (62), and third-order holes (63) with decreasing diameters from top to bottom; The pressure head (2), guide sleeve (9) and spring (19) are sequentially assembled in the hole from top to bottom; The guide sleeve (9) is tubular, and its outer peripheral surface is provided with a positioning shoulder (91), and the large-diameter section of the guide sleeve (9) is arranged in the second-stage hole (62) on the outer shell to position the shoulder. (91) limit, the large-diameter section of the guide sleeve (9) can move up and down in the second-stage hole (62) above; the small-diameter section of the guide sleeve (9) passes through the housing (6) The lower end face of the guide sleeve (9) is provided with a positioning hole shoulder (92); the lower end inner hole of the guide sleeve (9) is used for assembling the limit pin to be press-fitted; The indenter (2) is cylindrical, the upper end of the indenter (2) is provided with a first step excircle (21), and the lower end of the indenter (2) is provided with a second step excircle (22); The first stepped outer circle (21) of the outer shell is located in the first stepped hole (61) on the shell and is positioned on the shoulder formed by the first stepped hole (61) and the second stepped hole (62) on the shell; The second stepped outer circle (22) on the head penetrates into the inner hole of the guide sleeve (9), and the second stepped outer circle (22) on the pressure head is sleeved with the spring (19); the spring (19 ) is in conflict with the shaft shoulder at the upper end of the second step outer circle (22) on the indenter, and the lower end of the spring (19) is in conflict with the positioning hole shoulder (92) on the inner hole of the guide sleeve; The center line of the pressing head (2) coincides with the center line of the movable positioning pin (15). 2. The automatic press-fit limit pin device according to claim 1, characterized in that: a load cell (3) is fixedly connected below the connecting flange (4), and the load cell (3) is located at In the first-stage hole (61) on the housing and in contact with the upper end surface of the indenter (2), the center line of the load cell (3) and the center of the connecting shaft on the servo electric cylinder (5) Lines coincide. 3. The automatic press-fit limit pin device according to claim 2, characterized in that: the pipe wall at the lower end of the guide sleeve (9) is provided with a gap (93) in the axial direction, and the pipe wall at the lower end of the guide sleeve (9) A plurality of steel balls (18) are arranged on the circumference of the outer peripheral surface, and the steel balls (18) are positioned above the notch (93). The inner peripheral surface is axially provided with a guide groove for the steel ball (18) to slide to prevent the guide sleeve (9) from rotating. 4. The automatic press-fit limit pin device according to claim 3, characterized in that: the elastic force of the spring (19) is greater than the elastic force of the return spring (13) during assembly.