Device for radial pin press fitting of shaft products

Abstract

The utility model is specifically related to a device for the radial pin press fitting of shaft products, comprising a positioning support seat, a limiting mechanism, a positioning mechanism, a base plate and a press head. The limiting mechanism comprises a first limiting through hole and a second limiting through hole in communication, and the bottom of the limiting mechanism is fixed on the positioning support seat, so that the cavity of the positioning support seat is in communication with the second limiting through hole. The positioning mechanism is arranged in the cavity, one end of which is connected to the base plate, and the other end extends partially into the second limiting through hole. When the shaft workpiece is installed into the first limiting through hole, the positioning mechanism can be inserted into the pin hole of the shaft workpiece, ensuring that the pin hole and the radial pin are coaxial. The press head comprises a limiting part, one end of which is connected to the pressure output end, and the other end is provided with a pressing needle, which is collinear with the axis of the second limiting through hole. During press fitting, the limiting surface at the bottom of the limiting part abuts against the top surface of the limiting mechanism, ensuring that the exposed lengths of both ends of the radial pin are consistent and up to standard, greatly improving the quality and press fitting speed of the shaft workpiece.

Description

Technical Field

[0001] This utility model relates to the field of machining, specifically to a device for pressing radial pins onto shaft products. Background Technology

[0002] In production such as Figure 1 In the production process of the shaft-type workpieces shown, a very small radial pin (typically 11.7mm to 11.8mm in length and φ2.993mm to φ3mm in diameter) is usually press-fitted into its radial pin hole. The main function of this radial pin is to provide a precise positioning reference for subsequent assembly of the shaft-type workpiece. Therefore, to ensure the reliability and accuracy of workpiece positioning during subsequent use, the exposed lengths at both ends of the radial pin must be strictly consistent after press-fitting; that is, the dimensional deviation of the difference in exposed lengths at both ends must be controlled within 0.1mm. This dimensional requirement directly affects the assembly accuracy of the product. If the dimensional deviation of the exposed lengths at both ends of the radial pin exceeds 0.1mm, it will cause interference with other mating parts. Specifically, when the press-fitted component is inserted into the slot of the active part, since the size and position of the slot are fixed, if the exposed lengths at both ends of the radial pin are inconsistent, the inner wall of the slot will directly transmit power to the longer exposed end of the radial pin during the rotation of the active part, resulting in unilateral stress on the radial pin and affecting its service life.

[0003] Currently, the press-fitting process for radial pins mainly employs a combination of manual operation and simple tooling. The specific process is as follows: First, the clamping surface of the vise needs to be pre-machined by grinding to form an arc surface that matches the outer diameter of the shaft-like workpiece, preventing axial sliding or radial rotation of the workpiece during clamping. After the operator holds the workpiece and completes the clamping and positioning, they need to use tweezers to hold the radial pin. After aligning it with the pin hole axis, they operate the manual press handle to apply axial pressure to the end face of the radial pin through the press head until the radial pin is pressed into the preset depth. However, the above traditional process has the following significant problems:

[0004] 1) The clamping operation is cumbersome and the production efficiency is low.

[0005] In traditional processes, after the press-fitting operation is completed, the product is often removed and the exposed lengths at both ends of the radial pin are measured using a vernier caliper. If the lengths at both ends are found to be inconsistent, the workpiece needs to be re-clamped and the end face of the radial pin is pressed again. This process is repeated until the exposed length of the radial pin meets the requirements of the drawing.

[0006] Meanwhile, due to the extremely small size of the radial pins that need to be press-fitted, it is difficult to quickly and accurately position shaft-type workpieces during manual clamping. Once the clamping is misaligned, it needs to be readjusted, which is time-consuming and laborious. In addition, when using tweezers to pick up the radial pins, the radial pins are prone to falling off. Furthermore, during the pressing of the press handle, the clamped radial pins are prone to tilting due to unbalanced force, requiring repeated alignment before the operation can continue. This undoubtedly further increases the operation time and seriously restricts production efficiency.

[0007] 2) Consistency in the exposed length of radial pins is difficult to guarantee, resulting in unstable product quality.

[0008] Due to the randomness of manual operation, these extremely small radial pins are prone to uneven force during pressing due to clamping tilt before pressing, making it impossible to press them accurately along the pin hole axis, which in turn causes deviations in the exposed length of the radial pin ends. In addition, even with multiple measurements and repeated adjustments, it is still difficult to consistently achieve the dimensional accuracy required by the design. This not only increases the rework rate, but may also have an adverse effect on the assembly accuracy and positioning reliability of subsequent workpieces.

[0009] Therefore, how to improve the operational efficiency of radial pin press-fitting of shaft workpieces, while effectively ensuring the consistency of the exposed length at both ends of the radial pin to meet the quality and efficiency requirements in mass production, is a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0010] The purpose of this invention is to address the shortcomings of existing technologies by providing a device for pressing radial pins onto shaft products. This device can limit the positioning of the radial pins and shaft workpieces to be pressed, ensuring that the radial pins are precisely aligned with the pin holes of the shaft workpieces. Simultaneously, during the pressing process, it can strictly ensure that the exposed lengths of the radial pins at both ends of the shaft workpiece remain consistent, thereby significantly improving the pressing quality and efficiency of the shaft workpieces.

[0011] The objective of this utility model is achieved through the following solution:

[0012] An apparatus for press-fitting radial pins into shaft products includes a positioning support, a limiting mechanism, a positioning mechanism, a base plate, and a press head;

[0013] The limiting mechanism includes a first limiting through hole and a second limiting through hole for installing and inserting shaft-type workpieces. The second limiting through hole communicates with the first limiting through hole. The bottom of the limiting mechanism is fixed on a positioning support base, so that the cavity of the positioning support base communicates with the second limiting through hole of the limiting mechanism. The positioning mechanism is disposed in the cavity of the positioning support base. One end of the positioning mechanism is connected to a base plate fixedly disposed at the bottom of the positioning support base, and the other end of the positioning mechanism extends out of the cavity and extends to the second limiting through hole of the limiting mechanism. When the shaft-type workpiece is installed into the first limiting through hole of the limiting mechanism, the push rod of the positioning mechanism can be inserted into the pin hole of the shaft-type workpiece, so that the pin hole of the shaft-type workpiece is coaxial with the radial pin to be assembled.

[0014] The pressure head includes a limiting part, one end of which is provided with a connecting part connected to the pressure output end. The other end of the limiting part is provided with a pressure needle. The axis of the pressure needle is collinear with the axis of the second limiting through hole. The outer diameter of the limiting part is larger than the outer diameter of the pressure needle. When the pressure needle presses the radial pin into the pin hole of the shaft workpiece, the limiting surface at the bottom of the limiting part abuts against the top surface of the limiting mechanism, thereby ensuring that the exposed lengths of both ends of the radial pin after pressing are consistent and meet the preset dimensional accuracy requirements.

[0015] Preferably, the positioning mechanism includes a product positioning pin and an elastic element. The product positioning pin includes a first shaft segment, a second shaft segment, and a push rod. The first shaft segment is located in the first cavity of the cavity and is connected to one end of the elastic element. The other end of the elastic element is connected to the substrate. The outer circumferential dimension of the second shaft segment is adapted to the inner circumferential dimension of the second cavity of the cavity. The outer circumferential dimension of the push rod is adapted to the inner circumferential dimension of the second limiting through hole.

[0016] Preferably, a limiting groove is provided on both sides of the positioning support, and a through hole is provided on the first shaft section of the positioning mechanism. A crossbar passes through the through hole, and both ends of the crossbar extend through the limiting groove on the corresponding side.

[0017] Preferably, the outer diameter of the first shaft segment is larger than the outer diameter of the second shaft segment, and the elastic element is always in a compressed state.

[0018] Preferably, the system further includes a support column, which is fixedly mounted on the base plate. A handle is hinged to the support column, and the two hinged arms of the handle are located on both sides of the positioning support, so that the hinged arms can contact the extended crossbar.

[0019] Preferably, one end of the first limiting through hole of the limiting mechanism is provided with a positioning bushing, which is used to engage with one end of the shaft workpiece to form a radial limit on the shaft workpiece.

[0020] Preferably, the second limiting through hole and the radial pin are in clearance fit.

[0021] Preferably, the pressure needle and the second limiting through hole are in clearance fit.

[0022] Preferably, the other end of the first limiting through hole of the limiting mechanism is the insertion end of the shaft workpiece, and a pair of grooves are provided on the inner side wall of the insertion end to facilitate the removal of the shaft workpiece after pressing.

[0023] The beneficial effects of this utility model are as follows:

[0024] An apparatus for press-fitting radial pins into shaft products includes a positioning support, a limiting mechanism, a positioning mechanism, a base plate, and a press head;

[0025] The limiting mechanism includes a first limiting through hole and a second limiting through hole for installing and inserting shaft-type workpieces. The second limiting through hole communicates with the first limiting through hole. The bottom of the limiting mechanism is fixed on a positioning support base, so that the cavity of the positioning support base communicates with the second limiting through hole of the limiting mechanism. The positioning mechanism is disposed in the cavity of the positioning support base. One end of the positioning mechanism is connected to a base plate fixedly disposed at the bottom of the positioning support base, and the other end of the positioning mechanism extends out of the cavity and extends to the second limiting through hole of the limiting mechanism. When the shaft-type workpiece is installed into the first limiting through hole of the limiting mechanism, the push rod of the positioning mechanism can be inserted into the pin hole of the shaft-type workpiece, so that the pin hole of the shaft-type workpiece is coaxial with the radial pin to be assembled.

[0026] The pressure head includes a limiting part, one end of which is provided with a connecting part connected to the pressure output end. The other end of the limiting part is provided with a pressure needle. The axis of the pressure needle is collinear with the axis of the second limiting through hole. The outer diameter of the limiting part is larger than the outer diameter of the pressure needle. When the pressure needle presses the radial pin into the pin hole of the shaft workpiece, the limiting surface at the bottom of the limiting part abuts against the top surface of the limiting mechanism, thereby ensuring that the exposed lengths of both ends of the radial pin after pressing are consistent and meet the preset dimensional accuracy requirements.

[0027] The device of this utility model uses the first limiting through hole of the limiting mechanism to accurately limit the shaft workpiece, and with the help of the top rod of the positioning mechanism, when the shaft workpiece is installed in the first limiting through hole, it automatically inserts into its pin hole to ensure that the pin hole and the radial pin to be assembled are in a coaxial state. This effectively solves the problems of product misalignment and radial pin tilting during clamping in traditional processes, and avoids repeated alignment operations caused by positional deviation.

[0028] Meanwhile, by incorporating a pressure needle and a limiting part on the pressure head, this device ensures that when the radial pin is properly pressed into place (i.e., the exposed lengths at both ends of the radial pin are consistent), the limiting surface at the bottom of the limiting part precisely abuts against the top surface of the limiting mechanism. This design not only guarantees consistent product quality but also reduces the need for repeated measurement and extrusion processes in traditional manufacturing, significantly shortening clamping and operation time, reducing worker workload, improving production efficiency, and consistently ensuring that product dimensions meet drawing requirements.

[0029] Preferably, the positioning mechanism includes a product positioning pin and an elastic element. The product positioning pin includes a first shaft segment, a second shaft segment, and a push rod. The first shaft segment is located in the first cavity of the cavity and is connected to one end of the elastic element. The other end of the elastic element is connected to the substrate. The outer circumferential dimension of the second shaft segment is adapted to the inner circumferential dimension of the second cavity of the cavity. The outer circumferential dimension of the push rod is adapted to the inner circumferential dimension of the second limiting through hole.

[0030] The positioning mechanism of this invention adopts a segmented product positioning pin design, combined with an elastic element for elastic support. The first shaft segment connects to the elastic element to transmit elastic force, while the second shaft segment is adapted to the second cavity to ensure stable movement of the product positioning pin within the cavity. The outer circumference of the push rod is adapted to the second limiting through hole, ensuring precise guidance when the push rod is inserted into the pin hole of the shaft-like workpiece. This structure allows the product positioning pin to automatically insert into the pin hole of the shaft-like workpiece under the action of the elastic element, reliably achieving coaxial positioning of the pin hole and the radial pin, further improving positioning stability and accuracy, and effectively avoiding problems such as radial pin tilting and positional deviation in traditional processes.

[0031] Preferably, a limiting groove is provided on both sides of the positioning support, and a through hole is provided on the first shaft section of the positioning mechanism. A crossbar passes through the through hole, and both ends of the crossbar extend through the limiting groove on the corresponding side.

[0032] This utility model provides limiting grooves on both sides of the positioning support to restrict the movement of the crossbar along the elastic direction. This effectively constrains the movement of the positioning mechanism (product positioning pin) and prevents it from deviating from the preset positioning position due to excessive stretching and contraction of the elastic element. This ensures the positional stability and consistency of the push rod when it is inserted into the pin hole of the shaft workpiece.

[0033] Preferably, the outer diameter of the first shaft segment is larger than the outer diameter of the second shaft segment, and the elastic element is always in a compressed state.

[0034] This invention sets the outer diameter of the first shaft segment to be larger than that of the second shaft segment, forming a stepped structure to cooperate with the cavity for limiting the position. At the same time, it keeps the elastic element in a compressed state, which can continuously provide a stable elastic thrust for the positioning mechanism. This ensures that the push rod can reliably and automatically insert into the pin hole during the installation of shaft-type workpieces, further avoiding positioning deviations caused by insufficient elasticity or uncontrolled stroke of the positioning mechanism. This reduces the positional error during radial pin press-fitting, lowers the operating cost of repeated adjustments, and stably ensures the coaxial accuracy of the pin hole and the radial pin, ultimately improving the product press-fitting quality and production efficiency.

[0035] Preferably, the system further includes a support column, which is fixedly mounted on the base plate. A handle is hinged to the support column, and the two hinged arms of the handle are located on both sides of the positioning support seat, so that the hinged arms can contact the extended crossbar. This allows the hinged arms to contact the crossbar and drive the top rod of the positioning mechanism to move downward against the thrust of the elastic element by pressing down the handle. This allows the shaft workpiece to be smoothly installed into the first limiting through hole of the positioning support seat during installation. When the handle is released and the shaft workpiece is rotated, the top rod can be smoothly inserted into the pin hole of the shaft workpiece, thereby completing the positioning of the shaft workpiece.

[0036] This design, through the linkage between the handle and the positioning mechanism, effectively simplifies the assembly and disassembly process of shaft-type workpieces, reduces the complexity of manual operation, and further improves the convenience and efficiency of operation.

[0037] Preferably, one end of the first limiting through hole of the limiting mechanism is provided with a positioning bushing, which is used to engage with one end of the shaft workpiece to form a radial limit on the shaft workpiece.

[0038] Preferably, the second limiting through hole and the radial pin are clearance fit, so that after the radial pin is manually inserted, it can fall naturally to the pin hole opening of the shaft product by gravity, so as to achieve the initial alignment of the radial pin and the pin hole.

[0039] Preferably, the pressure needle and the second limiting through hole are in clearance fit so that the pressure needle can be accurately guided along the second limiting through hole during the pressure application process, and smoothly contact and squeeze the radial pin.

[0040] Preferably, the other end of the first limiting through hole of the limiting mechanism is the insertion end of the shaft workpiece, and a pair of grooves are provided on the inner side wall of the insertion end to facilitate the removal of the shaft workpiece after pressing. Attached Figure Description

[0041] Figure 1 A schematic diagram of the structure of a shaft-type workpiece after press-fitting;

[0042] Figure 2 This is a schematic diagram of the structure of this utility model;

[0043] Figure 3 This is a structural schematic diagram of another view of the present invention;

[0044] Figure 4 This is a three-dimensional cross-sectional view of part of the structure of this utility model;

[0045] Figure 5 This is a schematic diagram of the pressure head structure of this utility model;

[0046] Figure 6 This is a schematic diagram of the structure to be press-fitted in an embodiment of this utility model;

[0047] Figure 7 This is a structural schematic diagram of the pressing process in an embodiment of this utility model;

[0048] Figure 8 This is a schematic diagram of the positioning mechanism of this utility model. Detailed Implementation

[0049] like Figures 1 to 8 As shown, an apparatus for press-fitting radial pins onto shaft products includes a positioning support 1, a limiting mechanism 2, a positioning mechanism 3, a base plate 4, and a pressing head 15. The limiting mechanism 2 includes a first limiting through hole 201 for mounting and inserting a shaft workpiece 5, and a second limiting through hole 202 communicating with the first limiting through hole 201. The limiting mechanism 2 is fixedly connected to the positioning support 1, wherein the limiting mechanism 2 is fixed to the top of the positioning support 1 by threaded fasteners and pins, so that the cavity provided in the positioning support 1 communicates with the second limiting through hole 202 of the limiting mechanism 2. The positioning mechanism 3 is set in the cavity of the positioning support 1. One end of the positioning mechanism 3 is connected to the base plate 4 fixedly set at the bottom of the positioning support 1, and the other end of the positioning mechanism 3 extends out of the cavity and extends to the second limiting through hole 202 of the limiting mechanism 2. When the shaft workpiece 5 is installed into the first limiting through hole 201 of the limiting mechanism 2, the push rod 703 of the positioning mechanism 3 can be inserted into the pin hole of the shaft workpiece 5, so that the pin hole of the shaft workpiece 5 is coaxial with the radial pin 6 to be assembled.

[0050] Specifically, the positioning mechanism 3 includes a product positioning pin 7 and an elastic element 8. One end of the elastic element 8 is connected to the substrate 4. The product positioning pin 7 includes a first shaft segment 701, a second shaft segment 702, and a push rod 703. The first shaft segment 701 is located inside the first cavity 9 of the cavity and connected to the other end of the elastic element 8. In this embodiment, the elastic element 8 is a spring, and it is always in a compressed state to provide elastic force for the product positioning pin 7, ensuring that the push rod 703 can reliably and automatically insert into its pin hole during the installation of the shaft workpiece 5. The outer circumferential dimension of the second shaft segment 702 is adapted to the inner circumferential dimension of the second cavity 10 of the cavity, and the outer circumferential dimension of the push rod 703 is adapted to the inner circumferential dimension of the second limiting through hole 202, so as to achieve coaxial positioning of the pin hole and the radial pin, thereby improving the stability and accuracy of positioning. The outer circumferential dimension of the first shaft segment 701 is larger than that of the second shaft segment 702, so that the product positioning pin 7 can form a stepped structure to cooperate with the cavity to achieve axial positioning.

[0051] A limiting groove 101 is provided on both sides of the positioning support 1. A through hole 7011 is provided on the first shaft section 701 of the positioning mechanism 3. A crossbar 11 passes through the through hole 7011, and both ends of the crossbar 11 extend through the limiting groove 101 on the corresponding side. In this embodiment, the crossbar 11 and the through hole 7011 can be connected by threads to prevent the crossbar 11 from moving axially within the through hole 7011.

[0052] It also includes a support column 12, which is fixedly mounted on the base plate 4, and a handle 13 is hinged to the support column 12. The two hinge arms 1301 of the handle 13 are located on both sides of the positioning support 1, so that the hinge arms 1301 can contact the outer wall of the extended crossbar 11, so as to control the top rod 703 of the positioning mechanism 3 to move up and down by operating the handle 13, thereby realizing the disassembly of the shaft workpiece 5.

[0053] A positioning bushing 14 is provided at one end of the first limiting through hole 201 of the limiting mechanism 2, and the positioning bushing 14 is interference-fitted with the first limiting through hole 201. The inner circumferential dimension of the positioning bushing 14 is adapted to the outer circumferential dimension of the radial pin part to be assembled on the shaft workpiece 5. The other end of the first limiting through hole 201 of the limiting mechanism 2 is the insertion end of the shaft workpiece 5. Specifically, the inner wall of the positioning bushing 14 and the inner wall of the first limiting through hole 201 are provided with stepped surfaces adapted to the size and position of each shoulder of the shaft workpiece 5, so as to form a radial limit on the shaft workpiece 5 when it is installed from the insertion end, so that the axis of the pin hole and the axis of the second limiting through hole 202 are in the same plane. The insertion end of the shaft workpiece 5 in the first limiting through hole 201 includes a first hole segment 2012, the diameter of which is larger than the length of the radial pin 6 to be press-fitted. A pair of grooves 2011 are provided opposite each other on the inner wall of the first limiting through hole 201 at the insertion end, so that the shaft workpiece 5 can be easily removed after the radial pin 6 is press-fitted. In this embodiment, the grooves 2011 are located on a plane perpendicular to the axis of the second limiting through hole 202.

[0054] The inner diameter of the second limiting through hole 202 is slightly larger than the outer diameter of the radial pin 6, so that the second limiting through hole 202 and the radial pin 6 form a clearance fit.

[0055] The pressure head 15 includes a limiting part 1502. A connecting part 1503 is provided at one end of the limiting part 1502. The connecting part 1503 is connected to the pressure output end and is used to control the up and down movement of the pressure head 15. A pressure needle 1501 is provided at the other end of the limiting part 1502. The axis of the pressure needle 1501 is collinear with the axis of the second limiting through hole 202. The pressure needle 1501 and the second limiting through hole 202 are in clearance fit so that the pressure needle 1501 can smoothly enter the second limiting through hole 202 to press the radial pin 6 into the pin hole of the shaft workpiece 5. The outer diameter of the limiting part 1502 is larger than the outer diameter of the pressure needle 1501. When the pressure needle 1501 presses the radial pin 6 into the pin hole of the shaft workpiece 5, the limiting surface 1504 at the bottom of the limiting part 1502 just abuts against the top surface (i.e. the upper end surface) of the limiting mechanism 2, thereby ensuring that the exposed lengths of both ends of the radial pin 6 after pressing are consistent and meet the preset dimensional accuracy requirements.

[0056] The usage process of the above device is as follows:

[0057] Install the pressure head 15 onto the working part of the press, so that the pressure needle 1501 is coaxial with the second limiting through hole 202 of the limiting mechanism 2, ensuring that the pressure needle 1501 can be smoothly inserted into the second limiting through hole 202, avoiding scratching and jamming.

[0058] Press down handle 13 to move the push rod 703 of product positioning pin 7 downward, exiting the hole segment in the second limiting through hole 202 that intersects with the first limiting through hole 201. Insert shaft workpiece 5 into the first limiting through hole 201 until each shoulder of shaft workpiece 5 abuts against the corresponding step surface in the first limiting through hole 201 (or in other words, one end face of the shaft diameter segment of shaft workpiece 5 is in contact with the end face of limiting mechanism 2). At this time, the pin hole axis of shaft workpiece 5 and the axis of the second limiting through hole 202 are on the same plane.

[0059] Release handle 13 and continue rotating shaft workpiece 5 until its pin hole axis is vertical. At this time, the push rod 703 of the product positioning pin 7 automatically inserts into the pin hole under the spring force, so that the axis of the pin hole and the second limiting through hole 202 are coaxial. When the push rod 703 automatically inserts into the pin hole, handle 13 will be noticeably lifted.

[0060] The radial pin 6 is manually inserted into the second limiting through hole 202. The radial pin 6 falls to the pin hole of the shaft workpiece 5 under the action of gravity. Then, the machine tool handle is pressed down, and the pressure head 15 moves downward, so that the pressure needle 1501 applies pressure to the radial pin 6 until the limiting surface 1504 at the bottom of the limiting part 1502 of the pressure head 15 is in contact with the upper end surface of the limiting mechanism 2. At this time, the exposed lengths of the two ends of the radial pin of the shaft workpiece 5 are consistent.

[0061] After pressing, press down handle 13 and rotate shaft workpiece 5 90° so that both ends of radial pin 6 are in the corresponding grooves 2011. Then remove shaft workpiece 5 to complete the operation.

[0062] It is particularly noteworthy that the length of the pressure pin 1501 is typically determined based on the exposed length (or the length of the radial pin 6) at both ends of the actual press-fitted radial pin 6 of the shaft workpiece 5. In other words, the length of the pressure pin 1501 should follow these rules: , In the formula, This is the distance from the centerline of the shaft workpiece 5 to the upper end face of the limiting mechanism 2 (i.e., the distance from the limiting surface 1504 to the centerline of the shaft workpiece 5 when the radial pin 6 is pressed into place). The length of the pressure needle is 1501; The length of the radial pin 6; The pin hole length is for shaft-type workpiece 5; This refers to the exposed length of both ends of the radial pin after press-fitting.

[0063] In this embodiment, the length of the press-fitted radial pin 6 The pin hole length for shaft-type workpieces is 11.75 mm. The exposed length at both ends of the radial pin after press-fitting is 7.5mm. The length of the needle is 2.125 mm. In this device, the distance H from the center line of the shaft workpiece 5 to the upper end face of the limiting mechanism 2 is 12 mm. Therefore, the length of the needle can be determined to be 6.125 mm.

[0064] Experimental results show that, compared with traditional press-fitting processes, using this device to press-fit radial pins saves nearly 20 seconds per product on average. Furthermore, products produced using this device have stable dimensions, with the difference in exposed length between the two ends of the radial pin remaining between 0.03 and 0.06 mm, greatly improving the quality of the workpiece.

[0065] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications made to the present utility model by those skilled in the art without departing from the spirit of the present utility model shall fall within the protection scope of the present utility model.

Claims

1. A device for press-fitting radial pins onto shaft products, characterized in that, It includes a positioning support (1), a limiting mechanism (2), a positioning mechanism (3), a base plate (4), and a pressure head (15); The limiting mechanism (2) includes a first limiting through hole (201) and a second limiting through hole (202) for installing and inserting a shaft-type workpiece (5). The second limiting through hole (202) communicates with the first limiting through hole (201). The bottom of the limiting mechanism (2) is fixed on the positioning support (1), so that the cavity of the positioning support (1) communicates with the second limiting through hole (202) of the limiting mechanism (2). The positioning mechanism (3) is disposed in the cavity of the positioning support (1). One end of the positioning mechanism (3) is connected to the base plate (4) fixedly installed at the bottom of the positioning support (1). The other end of the positioning mechanism (3) extends out of the cavity and extends to the second limiting through hole (202) of the limiting mechanism (2). When the shaft workpiece (5) is installed into the first limiting through hole (201) of the limiting mechanism (2), the top rod (703) of the positioning mechanism (3) can be inserted into the pin hole of the shaft workpiece (5), so that the pin hole of the shaft workpiece (5) is coaxial with the radial pin (6) to be assembled. The pressure head (15) includes a limiting part (1502), one end of which is provided with a connecting part (1503), which is connected to the pressure output end. The other end of the limiting part (1502) is provided with a pressure needle (1501). The axis of the pressure needle (1501) is collinear with the axis of the second limiting through hole (202). The outer diameter of the limiting part (1502) is larger than the outer diameter of the pressure needle (1501). When the pressure needle (1501) presses the radial pin (6) into the pin hole of the shaft workpiece (5), the limiting surface (1504) at the bottom of the limiting part (1502) abuts against the top surface of the limiting mechanism (2), thereby ensuring that the exposed lengths of the two ends of the radial pin (6) after pressing are consistent and meet the preset dimensional accuracy requirements.

2. The apparatus according to claim 1, characterized in that, The positioning mechanism (3) includes a product positioning pin (7) and an elastic element (8). The product positioning pin (7) includes a first shaft segment (701), a second shaft segment (702), and a push rod (703). The first shaft segment (701) is located in the first cavity (9) of the cavity and is connected to one end of the elastic element (8). The other end of the elastic element (8) is connected to the substrate (4). The outer circumferential dimension of the second shaft segment (702) is adapted to the inner circumferential dimension of the second cavity (10) of the cavity. The outer circumferential dimension of the push rod (703) is adapted to the inner circumferential dimension of the second limiting through hole (202).

3. The apparatus according to claim 2, characterized in that, The positioning support (1) has a limiting groove (101) on both sides. The first shaft section (701) of the positioning mechanism (3) has a through hole (7011). A crossbar (11) passes through the through hole (7011), and the two ends of the crossbar (11) extend through the limiting groove (101) on the corresponding side.

4. The apparatus according to claim 2, characterized in that, The outer diameter of the first shaft segment (701) is greater than the outer diameter of the second shaft segment (702), and the elastic element (8) is always in a compressed state.

5. The apparatus according to claim 1 or 3, characterized in that, It also includes a support column (12), which is fixedly mounted on the base plate (4). A handle (13) is hinged on the support column (12). The two hinge arms (1301) of the handle (13) are located on both sides of the positioning support (1), so that the hinge arms (1301) can contact the extended crossbar (11).

6. The apparatus according to claim 1, characterized in that, The first limiting through hole (201) of the limiting mechanism (2) is provided with a positioning bushing (14) at one end. The positioning bushing (14) is used to engage with one end of the shaft workpiece (5) to form a radial limit on the shaft workpiece (5).

7. The apparatus according to claim 1, characterized in that, The second limiting through hole (202) and the radial pin (6) are in clearance fit.

8. The apparatus according to claim 1, characterized in that, The pressure needle (1501) and the second limiting through hole (202) are in clearance fit.

9. The apparatus according to claim 1, characterized in that, The other end of the first limiting through hole (201) of the limiting mechanism (2) is the insertion end of the shaft workpiece (5), and a pair of grooves (2011) are provided on the inner side wall of the insertion end to facilitate the removal of the shaft workpiece (5) after pressing.

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