Intermediate shaft hot-mount flexible slippable base device

Abstract

The utility model discloses a kind of intermediate shaft hot mounting flexible slippable base device, belong to intermediate shaft assembly hot mounting tooling technical field.Device includes bracket assembly, top pin assembly is connected with being supported on the bracket assembly, the upper surface of bracket assembly is provided with slide rail assembly;Slide rail assembly is provided with sliding block, the support hole structure that is compatible with intermediate shaft assembly is provided on the sliding block, and the sliding block is connected with sliding block driving device;Top pin assembly includes the top pin of being connected with top pin driving device, and top pin driving device is used to control top pin in the direction of axial parallel with support hole up and down movement;Top pin works when extending into the support hole structure and intermediate shaft assembly axial end surface contact, for intermediate shaft assembly provides floating positioning.The utility model forms the double positioning mechanism of "radial constraint+axial floating", effectively guarantee the coaxiality and position degree precision of intermediate shaft assembly in hot mounting process.

Description

Technical Field

[0001] This utility model belongs to the technical field of hot fitting tooling for intermediate shaft assemblies, and relates to a flexible and sliding base device for hot fitting of intermediate shafts. Background Technology

[0002] Against the backdrop of the rapid development of the new energy vehicle industry, new energy transmissions with a three-intermediate-shaft structure have become a mainstream technical solution due to their ability to effectively improve transmission efficiency and torque carrying capacity. However, this type of transmission places new demands on the accuracy of shaft transmission (especially the positional error of the intermediate shaft assembly, which must be controlled within an extremely small range) and safety factor. As a core component for power transmission, the assembly accuracy of the intermediate shaft assembly directly determines the smoothness of gear shifting, noise level, and service life of the transmission. To meet these high precision and high safety requirements, the industry generally adopts a hot-fitting process to assemble the intermediate shaft assembly, achieving a firm connection between the intermediate shaft and the gears through interference fit, thereby ensuring the stability of the shaft transmission.

[0003] However, the traditional hot-fitting gear clamps currently in use reveal many unavoidable defects in actual production, severely restricting production efficiency and product yield. Firstly, traditional clamps lack targeted anti-collision designs: intermediate shafts and assemblies are mostly handled manually for loading and unloading, which easily leads to collisions with the clamp's positioning structure and support components, causing scratches on the shaft teeth and damage to the gear chamfers. This not only increases the scrap rate but also requires additional costs for repair or replacement, contradicting the need for low-cost production. Secondly, loading and unloading are labor-intensive: traditional clamps lack automatic transfer mechanisms, requiring operators to manually and accurately place intermediate shafts weighing 20-30kg into the clamp's positioning position. Furthermore, after hot fitting, the high-temperature intermediate shaft assembly must be manually removed, which is not only time-consuming and labor-intensive but also poses a safety hazard of burns, failing to meet the ergonomic requirements of modern production lines. More importantly, traditional gear-setting tooling bases have extremely poor compatibility: the intermediate shaft lengths of different models of three-intermediate-shaft gearboxes vary significantly. The positioning components of traditional fixtures (such as centers and support seats) are mostly fixed structures, unable to be flexibly adjusted according to the intermediate shaft length. Every time an intermediate shaft of a different specification is changed, the entire positioning tooling needs to be disassembled and replaced, resulting in long changeover times, significantly reducing production efficiency, and requiring the stockpiling of multiple sets of dedicated tooling, increasing equipment procurement and inventory costs. In addition, the positioning method of traditional fixtures mostly relies on rigid clamping, which is prone to uneven clamping force or positioning benchmark deviation, leading to out-of-tolerance positional accuracy of the intermediate shaft assembly after hot assembly, further affecting the overall transmission accuracy of the gearbox and making it difficult to meet the high-precision assembly requirements of new energy gearboxes. For example, the Chinese invention patent application number 201711334548.X, "Hot-fit Gear Alignment Fixture for Sub-shaft Assembly," discloses a hot-fit gear alignment fixture for sub-shaft assembly. Although it can achieve hot-fit gear alignment between the sub-shaft and the gear, it still has the following significant drawbacks for the assembly scenario of the intermediate shaft assembly of a new energy transmission with a three-intermediate-shaft structure: The fixture adopts a vertical clamping structure, with the sub-shaft clamped and fixed from the bottom by a hydraulic chuck, and the upper center point centered from top to bottom. During loading and unloading, the sub-shaft needs to be manually placed vertically into the hydraulic chuck. During this process, the sub-shaft head is prone to collision with the upper center point and the positioning pin support plate. Moreover, after hot-fitting, the sub-shaft assembly needs to be manually removed from the vertical position. Under high temperature conditions, the assembly is prone to scratching the pneumatic positioning pin assembly and gear post on the side of the fixture due to unstable operation. It cannot solve the problem of collision between the intermediate shaft and the assembly, which contradicts the requirement for collision prevention. It lacks an automatic transfer mechanism, and loading and unloading rely entirely on manual handling. Operators need to precisely align the auxiliary shaft with the center of the hydraulic chuck, and after hot installation, they also need to manually remove the high-temperature assembly, thus not reducing labor intensity. Utility Model Content

[0004] The purpose of this utility model is to solve the technical problems of the traditional hot-fitting gear clamps in the prior art, such as the collision of intermediate shafts and intermediate shaft assemblies, high labor intensity in loading and unloading, and poor compatibility of gear clamping tooling bases, and to provide a flexible and sliding base device for hot-fitting intermediate shafts.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: In a first aspect, the present invention discloses a flexible, slidable base device for heat-fitting an intermediate shaft, comprising a support assembly, a top-end assembly supported and connected to the support assembly, and a slide rail assembly disposed on the upper surface of the support assembly; a slider disposed on the slide rail assembly, the slider having a support hole structure adapted to the intermediate shaft assembly, and the slider being connected to a slider driving device; the top-end assembly includes a top end connected to a top-end driving device, the top-end driving device being used to control the top end to move up and down in a direction parallel to the axial direction of the support hole; when the top end is in operation, it extends into the support hole structure and contacts the axial end face of the intermediate shaft assembly, providing floating positioning for the intermediate shaft assembly.

[0006] Further improvements are made in the following aspects: The support assembly includes a support with feet at the bottom, and a worktable is connected to the support; the worktable is provided with a plurality of positioning pins for the installation and positioning of the slide rail assembly.

[0007] The slide rail assembly includes a slide rail base plate fixedly connected to the bracket assembly, and a linear guide rail is provided on the slide rail base plate; the slider is movably connected to the linear guide rail; a shaft support is positioned and assembled on the slider through a stop structure and fixed by a connector; a needle roller-cage thrust assembly, a universal washer, and a support base are sequentially sleeved on the shaft support from bottom to top; the support base is provided with a support hole adapted to the intermediate shaft assembly.

[0008] A stop block is provided at one end of the slide rail base plate along the direction of the linear guide rail, and an outer stop block is provided at the other end.

[0009] The slide rail base plate is provided with a positioning plate for guiding the installation of the linear guide rail.

[0010] The slider driving device is a clamping assembly; the clamping assembly includes a rodless cylinder connected to the bracket assembly, a base connecting plate connected to the rodless cylinder, and the base connecting plate connected to the slider; the rodless cylinder is connected to an air pipe connector as an air source interface.

[0011] The top drive device is a three-stage cylinder.

[0012] The tip assembly includes a sleeve connected to the support assembly via a connector. A tip bushing and a tip are sequentially fitted inside the sleeve from the outside in, with the tip and tip bushing having a clearance fit. An adapter sleeve is connected to the lower end of the sleeve. A cylinder spring seat is movably fitted within the adapter sleeve, and a compression spring is installed in the cylinder spring seat. The bottom end of the tip rests on the compression spring. The tip and the cylinder spring seat have a clearance fit. The lower end of the cylinder spring seat is threadedly connected to the telescopic rod of a three-section cylinder. The compression spring is equipped with a foot-operated compression device.

[0013] The bottom end of the tip is provided with a mounting protrusion, which is engaged in the compression spring.

[0014] The foot pedal compression device includes a foot pedal crossbar disposed above the compression spring, and the foot pedal crossbar is provided with a through hole for the mounting protrusion to pass through; foot pedal vertical bars are respectively connected to both ends of the foot pedal crossbar, and the two foot pedal vertical bars are connected by foot pedal bars after extending to a set position. A fixing seat is provided on the outer side of the adapter sleeve at a position corresponding to the foot pedal vertical rod, and the foot pedal vertical rod passes through the corresponding fixing seat.

[0015] Compared with the prior art, the present invention has the following beneficial effects: This utility model discloses a flexible, sliding base device for heat-fitting intermediate shafts. The intermediate shaft assembly is supported by a slider in a slide rail assembly, and a slider drive device enables smooth transport of the intermediate shaft assembly, avoiding direct contact with the support assembly, tip assembly, and other structures during manual handling. Simultaneously, the tip drive device controls the tip to stay away from the support hole structure during loading and unloading, preventing collisions between the intermediate shaft assembly shaft head and the tip. This effectively avoids problems such as tooth scratches and gear chamfer damage, significantly reducing the scrap rate of parts and minimizing repair or replacement costs due to impacts. The tip drive device can flexibly adjust the position of the tip along the axial direction of the support hole, precisely controlling the depth of the tip's insertion into the support hole structure, ensuring reliable contact between the tip and the axial end face of the intermediate shaft assembly and providing floating positioning. Without replacing the support assembly, slide rail assembly, or other basic structures, the device can adapt to the heat-fitting gear requirements of intermediate shafts of different lengths simply by adjusting the tip position. The device has strong compatibility, significantly shortens changeover time, and reduces the cost of special tooling reserves. The slider drive device drives the slider to move automatically along the slide rail assembly, realizing the automatic loading (transfer to the hot assembly station) and unloading (transfer to the picking station) of the intermediate shaft assembly. Combined with the hoisting method, this completes the initial placement and final removal of the intermediate shaft assembly. Operators do not need to manually handle or precisely align the heavy intermediate shaft assembly, avoiding high-intensity work in high-temperature environments, reducing labor intensity and safety hazards such as burns, meeting the ergonomic requirements of modern production lines. The center point provides floating positioning through the center point drive device. When in contact with the axial end face of the intermediate shaft assembly, it can adaptively compensate for assembly errors, avoiding stress concentration or positioning deviation caused by rigid positioning. At the same time, the support hole structure provides radial stability support for the intermediate shaft assembly. Combined with the axial floating positioning of the center point, a dual positioning mechanism of "radial constraint + axial floating" is formed, effectively ensuring the coaxiality and positional accuracy of the intermediate shaft assembly during the hot assembly process, thereby improving the shaft transmission accuracy and safety factor of the three intermediate shaft structure new energy transmission.

[0016] Furthermore, the center drive device is a three-stage cylinder. This three-stage cylinder allows for precise control of the center's extension or retraction distance along the support hole axis by switching between different stroke levels, thus adapting to the axial positioning requirements of three different length intermediate shafts. Compared to traditional fixed-stroke drive structures that require disassembly and replacement of components to accommodate workpieces of different lengths, this device requires no modification to the support assembly, slide rail assembly, or other basic structures. Positioning switching for intermediate shafts of different specifications can be completed simply by adjusting the stroke of the three-stage cylinder, making changeover operations convenient and significantly shortening changeover time. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a front view of the support assembly in a flexible, sliding base device for heat-fitting intermediate shaft according to an embodiment of the present utility model. Figure 2 This is a side view of the support assembly in a flexible, sliding base device for heat-fitting intermediate shaft according to an embodiment of the present utility model. Figure 3 This is a front view of the top component in a flexible, sliding base device for heat-fitting an intermediate shaft, as described in an embodiment of this utility model. Figure 4 This is a cross-sectional view of the top component in a flexible, sliding intermediate shaft heat-fitting base device according to an embodiment of the present utility model. Figure 5 This is a schematic diagram of the clamping assembly in a flexible, sliding base device for heat-fitting intermediate shaft according to an embodiment of the present invention. Figure 6 This is a side view of the slide rail assembly in a flexible, sliding base device for heat-fitting an intermediate shaft, as described in an embodiment of this utility model. Figure 7 This is a front view of the slide rail assembly in a flexible, sliding base device for heat-fitting an intermediate shaft, according to an embodiment of this utility model. Figure 8 This is a front view of a flexible, sliding base device for heat-fitting an intermediate shaft, as described in an embodiment of this utility model. Figure 9 This is a side view of a flexible, sliding base device for heat-fitting an intermediate shaft, as described in an embodiment of this utility model. Figure 10 This is a state diagram of a flexible, sliding base device for heat-fitting an intermediate shaft before loading, as described in this utility model embodiment. Figure 11 This is a diagram showing the loading process of a flexible, sliding base device for heat-fitting an intermediate shaft in an embodiment of this utility model. Figure 12 This is a diagram showing the state of a flexible, sliding base device for heat-fitting an intermediate shaft after loading, according to an embodiment of this utility model.

[0019] Wherein: 1-Bracket assembly; 101-Workbench; 102-Positioning pin; 103-Bracket; 104-First screw; 105-Foot assembly; 2-Top assembly; 201-Top; 202-Sleeve; 203-Second screw; 204-Top bushing; 205-Foot pedal crossbar; 206-Third screw; 207-Cylinder spring seat; 208-Compression spring; 209-Adapter sleeve; 210-Fourth screw; 211-Fixed seat; 212-Three-stage cylinder; 213-Foot pedal vertical rod; 214-Air pipe connector; 215-Rod connector; 3-Clamping assembly Components; 301-Rodless cylinder; 302-Air pipe connector; 303-Fifth screw; 304-Base connecting plate; 305-Sixth screw; 306-Seventh screw; 4-Slide rail assembly; 401-Outer stop; 402-Eleventh screw; 403-Slide rail base plate; 404-Positioning baffle; 405-Positioning plate; 406-Shaft support; 407-Twelfth screw; 408-Stop; 409-C-type cylindrical pin; 410-Eighth screw; 411-Needle roller-cage thrust assembly; 412-Universal washer; 413-Support base; 5-Intermediate shaft assembly. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0022] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0023] In the description of the embodiments of this utility model, it should be noted that if terms such as "upper," "lower," "horizontal," or "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use, they are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the utility model. Furthermore, terms such as "first" and "second" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0024] Furthermore, the use of the term "horizontal" does not imply that the component must be absolutely horizontal, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0025] In the description of the embodiments of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0026] The present invention will now be described in further detail with reference to the accompanying drawings: See Figure 8 and Figure 9 This utility model discloses a flexible, sliding base device for heat-fitting an intermediate shaft, including a support assembly 1, a top assembly 2 supported and connected to the support assembly 1, and a slide rail assembly 4 disposed on the upper surface of the support assembly 1; a slider 417 disposed on the slide rail assembly, the slider 417 being provided with a support hole structure adapted to the intermediate shaft assembly 5, and the slider 417 being connected to a slider driving device; the top assembly 2 includes a top 1 connected to a top driving device, the top driving device being used to control the top 1 to move up and down in a direction parallel to the axial direction of the support hole; when the top 1 is working, it extends into the support hole structure and contacts the axial end face of the intermediate shaft assembly 5, providing floating positioning for the intermediate shaft assembly 5.

[0027] See Figure 1 and Figure 2 The bracket assembly 1 includes a bracket 103 with a foot assembly 105 at the bottom, and a workbench 101 is connected to the bracket 103; the workbench 101 is provided with a plurality of positioning pins 102 for the installation and positioning of the slide rail assembly 4.

[0028] See Figure 3 and Figure 4 The aforementioned center drive device is a three-stage cylinder 212. This device controls the center to move away from the support hole structure during loading and unloading, preventing collisions between the intermediate shaft assembly head and the center. This effectively avoids problems such as tooth scratches and gear chamfer damage, significantly reducing the scrap rate of parts and minimizing repair or replacement costs due to impacts. The center drive device can flexibly adjust the position of the center along the axial direction of the support hole, precisely controlling the depth of the center's insertion into the support hole structure. This ensures reliable contact between the center and the axial end face of the intermediate shaft assembly, providing floating positioning. There is no need to replace the bracket assembly, slide rail assembly, or other basic structures; simply adjusting the center position is sufficient to accommodate the hot-fitting gear requirements of intermediate shafts of different lengths. The device has strong compatibility, significantly shortening changeover time and reducing the cost of special tooling reserves. The tip assembly 2 includes a sleeve 202 connected to the bracket assembly 1 via a connector. From the outside to the inside, tip bushing 204 and tip 201 are sequentially fitted within the sleeve 202, with tip 201 and tip bushing 204 in a clearance fit. An adapter sleeve 209 is connected to the lower end of the sleeve 202. A cylinder spring seat 207 is movably fitted within the adapter sleeve 209, and a compression spring 208 is disposed within the cylinder spring seat 207. The bottom end of tip 1 rests on the compression spring 208. Tip 1 and cylinder spring seat 207 are in a clearance fit. The lower end of cylinder spring seat 207 is threadedly connected to the telescopic rod of a three-section cylinder 212. The compression spring 208 is equipped with a foot-operated compression device. A mounting protrusion is provided at the bottom end of tip 1, which engages with the compression spring 208. The foot pedal compression device includes a foot pedal crossbar 205 positioned above the compression spring 208, with a through hole for the mounting protrusion to pass through. Foot pedal vertical bars 213 are connected to both ends of the crossbar 205, extending to a set position and connected via a foot pedal. A fixing seat 11 is provided on the outer side of the adapter sleeve 209 at a position corresponding to the foot pedal vertical bar 213, through which the foot pedal vertical bar 213 passes. The center point provides floating positioning via a center point drive device, adaptively compensating for assembly errors when in contact with the axial end face of the intermediate shaft assembly, avoiding stress concentration or positioning deviation caused by rigid positioning. Simultaneously, the support hole structure provides radial stable support to the intermediate shaft assembly. Combined with the axial floating positioning of the center point, a dual positioning mechanism of "radial constraint + axial floating" is formed, effectively ensuring the coaxiality and positional accuracy of the intermediate shaft assembly during hot assembly, thereby improving the shaft transmission accuracy and safety factor of the three intermediate shaft structure new energy transmission.

[0029] See Figure 5The slider driving device is a clamping assembly 3; the clamping assembly 3 includes a rodless cylinder 301 connected to the support assembly 1, a base connecting plate 304 connected to the rodless cylinder 301, and the base connecting plate 304 connected to the slider 417; the rodless cylinder 301 is connected to an air pipe connector 302 as an air source interface. The slider driving device drives the slider to move automatically along the slide rail assembly, realizing the automatic loading (transfer to the hot fitting station) and unloading (transfer to the picking station) of the intermediate shaft assembly. With the help of the hoisting method, the initial placement and final removal of the intermediate shaft assembly are completed. The operator does not need to manually carry or accurately align the heavy intermediate shaft assembly, avoids high-intensity operation in high-temperature environments, reduces labor intensity and reduces safety hazards such as high-temperature burns, and meets the ergonomic requirements of modern production lines.

[0030] See Figure 6 and Figure 7 The slide rail assembly 4 includes a slide rail base plate 403 fixedly connected to the bracket assembly 1, and a linear guide rail 414 is provided on the slide rail base plate 403. A slider 417 is movably connected to the linear guide rail 414. A shaft support 406 is positioned and assembled on the slider 417 through a stop structure and fixed by a connector. A needle roller-cage thrust assembly 411, a universal washer 412, and a support base 413 are sequentially sleeved on the shaft support 406 from bottom to top. The support base 413 is provided with a support hole adapted to the intermediate shaft assembly 5. A stop block 408 is provided at one end of the slide rail base plate 403 along the direction of the linear guide rail 414, and an outer stop block 401 is provided at the other end. A positioning plate 405 is provided on the slide rail base plate 403 for guiding the installation of the linear guide rail 414. This utility model discloses a flexible and slidable base device for heat-fitting intermediate shafts. The intermediate shaft assembly is supported by the slider of the slide rail assembly, and the intermediate shaft assembly is moved smoothly in conjunction with the slider drive device, avoiding direct contact with the support assembly, top assembly and other structures during manual handling.

[0031] The working principle of this utility model is as follows: This invention designs a flexible, sliding base device for heat-fitting intermediate shafts, comprising a support assembly 1, a center assembly 2, a clamping assembly 3, and a slide rail assembly 4. The support assembly 1 is used for positioning and fixing the center assembly 2, clamping assembly 3, and slide rail assembly 4. The center assembly 2 is used for axial floating positioning compatible with three intermediate shafts of different lengths, and to meet the requirement of avoiding interference between the shaft head and the support assembly 1 during intermediate shaft loading and unloading. The clamping assembly 3 is used for position limiting of the slide rail assembly 4 before and after intermediate shaft loading. The slide rail assembly 4 is used for clamping the intermediate shaft and for automatic loading and unloading. When using this device, the intermediate shaft is manually hoisted onto the slide rail assembly 4, thus completing the pre-heat-fitting preparations such as automatic loading, positioning, and clamping of the intermediate shaft, as well as the unloading of the intermediate shaft assembly after heat-fitting.

[0032] Support assembly 1 consists of Figure 1 and Figure 2 As shown. The workbench 101 and the bracket 103 are connected by the first screw 104. The positioning pin 102 is assembled onto the workbench 101 for positioning and installing the slide rail assembly 4 and the bracket assembly 1. The foot assembly 105 is assembled with the bracket 103 for adjusting the height of the bracket assembly 1.

[0033] Top Component 2 is composed of Figure 3 and Figure 4 As shown. Sleeve 202 is connected to the worktable 101 of bracket assembly 1 by the second screw 203. The center bushing 204 is assembled with sleeve 202 with a transition fit. The center bushing 204 serves as a motion guide for the center 201, ensuring that the center 201 moves without offset in the axial direction. The center 201 can rotate freely in the circumferential direction, meeting the requirement that the intermediate shaft can still be easily rotated manually after the center 202 contacts the intermediate shaft. The adapter sleeve 209 is connected to sleeve 202 by the third screw 206. The three-stage cylinder 212 is connected to adapter sleeve 209 by the second screw 203. The cylinder spring seat 207 is threadedly connected to the telescopic rod of the three-stage cylinder 212. The compression spring 208 is placed inside the cylinder spring seat 207. The center 201 is clearance-fitted with the cylinder spring seat 207 and placed inside the compression spring. On spring 208, when the three-stage cylinder 212 is activated, it drives the cylinder spring seat 207 to move in the axial direction, and the spring force of spring 208 pushes the tip 201 to move in the axial direction; the foot pedal crossbar 205 passes through the mounting protrusion of the tip 201 and is connected to the foot pedal vertical bar 213 through the rod joint 215. When the foot pedal vertical bar 213 is stepped on by the user, it compresses the spring 208, causing the tip 201 to move downward, avoiding interference between the shaft head and the bracket assembly when the intermediate shaft is loading and unloading; the fixed seat 211 and the adapter sleeve 209 are connected together by the fourth screw 210. When the foot pedal vertical bar 213 is stepped on by the user, the fixed seat 206 acts as a movement guide for the foot pedal vertical bar 213, preventing the foot pedal vertical bar 213 from wobbling during movement; the air pipe joint 214 is threadedly connected to the three-stage cylinder 212, serving as the air source interface for the tip assembly 2.

[0034] The clamping assembly consists of Figure 5 As shown. The rodless cylinder 301 is connected to the base connecting plate 304 by the fifth screw 303. When the rodless cylinder 301 extends or retracts, it drives the base connecting plate 304 to move. The clamping assembly 3 is fixed to the slide rail of the slide rail assembly 4 by the sixth screw 305, which indirectly drives the support base 413 of the slide rail assembly 4 to move, realizing the automatic loading and unloading of the intermediate shaft. The air pipe connector 302 is threadedly connected to the rodless cylinder 301 and serves as the air source interface of the clamping assembly 3. The clamping assembly 3 is connected to the worktable 101 of the support assembly 1 by the seventh screw 306.

[0035] Slide rail assembly 4 is composed of Figure 6and Figure 7 As shown. The positioning plate 405 is positioned and installed on the slide rail base plate 403 by a C-shaped cylindrical pin 409 and fixed by the ninth screw 415; the linear guide rail 414 uses the positioning plate 405 as an installation guide and is connected to the slide rail base plate 403 by the ninth screw 415. The positioning baffle 404 is connected to the slide rail base plate 403 by the tenth screw 416 and can also clamp the linear guide rail 414 to achieve precise positioning and installation of the linear guide rail 414; the slider 417 is connected to the linear guide rail 414 by the eighth screw 410, and the shaft support 406 uses a stop structure to connect with the slider 417. 7. Positioning assembly, fixed by the ninth screw 415; the needle roller-cage thrust assembly 411, universal washer 412 and support base 413 are sequentially fitted onto the shaft support 406. The support base 413, relying on the set twelfth screw 407, the T-slot fit structure of the shaft support 406 and the needle roller-cage thrust assembly 411, can both allow the intermediate shaft to perform free circumferential rotation manually and perform axial limiting; the outer stop 401 and stop 408 are connected to the slide rail base plate 403 by the eleventh screw 402, which plays a limiting role in the movement of the slider 417.

[0036] This utility model discloses a flexible, sliding intermediate shaft heat-fitting base device. Figure 8 and Figure 9 As shown, the bracket assembly 1, the center assembly 2, the clamping assembly 3, the slide rail assembly 4, and the intermediate shaft assembly 5 are assembled together. The intermediate shaft assembly 5 is placed on the support base of the slide rail assembly 4. The bracket assembly 1 is connected to the center assembly 2, the clamping assembly 3, and the slide rail assembly 4 respectively through positioning pins and threaded structures; the base device's states before and after loading and unloading are as follows. Figure 10 , Figure 11 and Figure 12 As shown.

[0037] The working process of this utility model is as follows: With the rodless cylinder of clamping assembly 3 retracted, the intermediate shaft assembly 5 is placed on the support base 413 of slide rail assembly 4 using a lifting device. While the tip 201 moves downward by stepping on the foot pedal of tip assembly 2, the rodless cylinder 301 of clamping assembly 3 extends, driving the slider of slide rail assembly 4 to complete the loading of intermediate shaft assembly 5. Based on the length of the intermediate shaft, the working state of the three-section cylinder 212 of the center assembly 2 should meet the requirement that the end face of the intermediate shaft teeth floats 2-3mm above the support base of the slide rail assembly. In this state, it is confirmed that the center of the center assembly has completed the axial positioning of the intermediate shaft (meeting the clamping coaxiality requirements). The upper center point falls down and presses against the upper end face of the intermediate shaft, the end face of the intermediate shaft teeth is in close contact with the support base 413 of the slide rail assembly 4, and the intermediate shaft can be manually rotated freely in the circumferential direction. The gear teeth "K" marking and intermediate shaft gear teeth are matched using the gear matching assembly; The three-stage cylinder 212 of the top component 2 retracts. When the foot pedal of the top component 2 is stepped on to make the top 201 move downward, the rodless cylinder 301 of the clamping component 3 retracts, which drives the slider 417 of the slide rail component 4 to move and complete the unloading of the intermediate shaft assembly 5. The intermediate shaft assembly 5 is lifted off the support base 413 of the slide rail component 4 using a lifting tool, thus completing the entire intermediate shaft hot-fitting and gear-aligning process.

[0038] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A flexible, sliding base device for heat-fitting intermediate shafts, characterized in that, The assembly includes a support assembly (1), on which a top assembly (2) is supported and connected. A slide rail assembly (4) is provided on the upper surface of the support assembly (1). A slider (417) is provided on the slide rail assembly. The slider (417) is provided with a support hole structure adapted to the intermediate shaft assembly (5). The slider (417) is connected to a slider drive device. The top assembly (2) includes a top (201) connected to a top drive device. The top drive device is used to control the top (201) to move up and down in a direction parallel to the axial direction of the support hole. When the top (201) is working, it extends into the support hole structure and contacts the axial end face of the intermediate shaft assembly (5) to provide floating positioning for the intermediate shaft assembly (5).

2. The intermediate shaft heat-fitted flexible sliding base device according to claim 1, characterized in that, The bracket assembly (1) includes a bracket (103) with a foot assembly (105) at the bottom, and a workbench (101) is connected to the bracket (103); the workbench (101) is provided with a plurality of positioning pins (102) for the installation and positioning of the slide rail assembly (4).

3. The intermediate shaft heat-fitted flexible sliding base device according to claim 1, characterized in that, The slide rail assembly (4) includes a slide rail base plate (403) fixedly connected to the bracket assembly (1), and a linear guide rail (414) is provided on the slide rail base plate (403); the slider (417) is movably connected to the linear guide rail (414); the slider (417) is equipped with a shaft support (406) through a stop structure and fixed by a connector; the shaft support (406) is provided with a needle roller-cage thrust assembly (411), a universal washer (412) and a support base (413) sequentially from bottom to top; the support base (413) is provided with a support hole that is compatible with the intermediate shaft assembly (5).

4. The intermediate shaft heat-fitted flexible sliding base device according to claim 3, characterized in that, A stop block (408) is provided at one end of the slide rail base plate (403) along the direction of the linear guide rail (414), and an outer stop block (401) is provided at the other end.

5. The intermediate shaft heat-fitted flexible sliding base device according to claim 3, characterized in that, The slide rail base plate (403) is provided with a positioning plate (405) for guiding the installation of the linear guide rail (414).

6. The intermediate shaft heat-fitted flexible sliding base device according to claim 3, characterized in that, The slider driving device is a clamping assembly (3); the clamping assembly (3) includes a rodless cylinder (301) connected to the bracket assembly (1), a base connecting plate (304) connected to the rodless cylinder (301), and the base connecting plate (304) connected to the slider (417); the rodless cylinder (301) is connected to an air pipe connector (302) as an air source interface.

7. The intermediate shaft heat-fitted flexible sliding base device according to claim 1, characterized in that, The top drive device is a three-stage cylinder (212).

8. The intermediate shaft heat-fitted flexible sliding base device according to claim 7, characterized in that, The tip assembly (2) includes a sleeve (202) connected to the bracket assembly (1) via a connector. The sleeve (202) is fitted with a tip bushing (204) and a tip (201) from the outside to the inside. The tip (201) and the tip bushing (204) are clearance-fitted. The lower end of the sleeve (202) is connected to an adapter sleeve (209). A cylinder spring seat (207) is movably fitted in the adapter sleeve (209). A compression spring (208) is provided in the cylinder spring seat (207). The bottom end of the tip (201) is placed on the compression spring (208). The tip (201) and the cylinder spring seat (207) are clearance-fitted. The lower end of the cylinder spring seat (207) is threaded with the telescopic rod of a three-section cylinder (212). The compression spring (208) is provided with a foot-operated compression device.

9. The intermediate shaft heat-fitted flexible sliding base device according to claim 8, characterized in that, The bottom end of the tip (201) is provided with a mounting protrusion, which is engaged in the compression spring (208).

10. The intermediate shaft heat-fitted flexible sliding base device according to claim 9, characterized in that, The foot pedal compression device includes a foot pedal crossbar (205) disposed above the compression spring (208), and the foot pedal crossbar (205) is provided with a through hole for the mounting protrusion to pass through; the two ends of the foot pedal crossbar (205) are respectively connected to foot pedal vertical bars (213), and the two foot pedal vertical bars (213) are connected by foot pedal bars after extending to a set position. A fixing seat (11) is provided on the outer side of the adapter sleeve (209) at a position corresponding to the foot pedal vertical rod (213), and the foot pedal vertical rod (213) passes through the corresponding fixing seat (11).

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