Mandrel connecting device and needling machine

Abstract

The utility model discloses a mandrel connecting device and a needling machine, and relates to the field of needling machines, the mandrel connecting device comprises a locking bearing which is sleeved at one end of a mandrel so as to fix the axial position of the mandrel; and the coupler is arranged at the other end of the mandrel, and the mandrel is connected with the output end of a driving motor through the coupler. The mandrel is fixed through the locking bearing, so that the mandrel is simple to adjust and install, free of clearance and movement, simple to disassemble and assemble, and adjustable in length. The coupling is connected with the driving motor, and the spline is matched with the shaft, so that the torque loss is small, the rotating gap is small, the structure is simple and easy to machine, and the shaft is adjustable in length according to the length of the die and easy to replace.

Description

TECHNICAL FIELD

[0001] The utility model relates to needle machine technical field, especially a kind of mandrel connecting device and needle machine. BACKGROUND

[0002] Needle machine is a kind of machine for processing fiber material by puncture, widely used in production of non-woven fabric, carpet, filter cloth, filling material and other products. Needle machine is used to puncture and fix fiber material together by using needle with hook (called needle) to achieve the effect of reinforcing and setting loose fiber (such as wool, polyester, cotton, etc.). The fixing mode of the existing needle machine mandrel is that the end of the mandrel is in contact with four rollers. This contact is a point contact type and has no axial constraint. The main problems are as follows: 1. Four bolt columns coincide with the function of lifting ball screw and may cause insufficient stiffness. 2. Four rollers are in contact with the outside of the shaft, which may cause insufficient dynamic stiffness. 3. The length of the support point of the connecting support shaft is too long, which may cause stiffness reduction and local maximum strength rise. 4. The static strength and dynamic stiffness, resonance frequency caused by the length and length-diameter ratio of the hollow shaft should be considered. 5. The length of the extended shaft is too long, which causes the stiffness and strength of the shaft to decrease. SUMMARY

[0003] In view of the problems existing in the prior art, the utility model is proposed.

[0004] Therefore, the problem to be solved by the utility model is how to improve the strength of the mandrel and reduce resonance.

[0005] To solve the above technical problems, in the first aspect, the utility model provides the following technical scheme: a mandrel connecting device, comprising a locking bearing, which is sleeved on one end of the mandrel to fix the axial position of the mandrel; a shaft coupling is arranged on the other end of the mandrel, and the mandrel is connected to the output end of a driving motor through the shaft coupling.

[0006] As a preferred scheme of the mandrel connecting device of the utility model, the locking bearing is fixedly arranged on the surface of a first base, and a first rotating shaft is also fixedly arranged on the other surface of the first base relative to the locking bearing.

[0007] As a preferred scheme of the mandrel connecting device of the utility model, the first oscillating base is further included, and two first bearings are arranged on the surface of the first oscillating base at intervals, and the first rotating shaft is arranged between the two first bearings and axially fixed at both ends.

[0008] As a preferred scheme of the mandrel connecting device of the utility model, the shaft coupling comprises a connecting column and a connecting flange fixedly connected to the end of the connecting column, and the connecting column is provided with a radial notch.

[0009] As a preferred scheme of the core shaft connecting device, the utility model provides a main shaft and a main shaft box are arranged between the shaft coupling and the output end of the driving motor, the main shaft passes through the main shaft box and is connected with the shaft coupling at one end and is connected with the output end of the driving motor at the other end.

[0010] As a preferred scheme of the core shaft connecting device, the utility model provides a main shaft and a main shaft box are arranged between the shaft coupling and the output end of the driving motor, the main shaft passes through the main shaft box and is connected with the shaft coupling at one end and is connected with the output end of the driving motor at the other end.

[0011] As a preferred scheme of the core shaft connecting device, the utility model provides a main shaft and a main shaft box are arranged between the shaft coupling and the output end of the driving motor, the main shaft passes through the main shaft box and is connected with the shaft coupling at one end and is connected with the output end of the driving motor at the other end.

[0012] On the other hand, the utility model also provides a needle loom, it includes the core shaft connecting device, still include first adjusting assembly, set up in the end close to the locking bearing, it includes slide rail and mobile seat, the mobile seat with the slide rail sliding fit, the first swing base is fixedly arranged on the mobile seat, second adjusting assembly, set up in the bottom of core shaft, it includes second screw rod and the frame that cooperates with it, third adjusting assembly, it sets up in the frame and close to the end of shaft coupling, it includes elongated pole and third swing base

[0013] As a preferred scheme of the needle loom, the utility model provides a first adjusting motor and a first screw rod are further included in the first adjusting assembly, the first adjusting motor is used for driving the first screw rod, the first screw rod is matched with the mobile seat and is used for adjusting the height of the mobile seat.

[0014] As a preferred scheme of the needle loom, the utility model provides that one end of the elongated pole is hinged with the second base, and the third swing base is hinged with the frame.

[0015] The utility model has the advantages that: the utility model fixes the core shaft through the locking bearing, so that it is simple to adjust and install, has no gap and does not move, is simple to disassemble and assemble, and the length of the shaft can be adjusted. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the drawings needed to be used in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0017] Figure 1 The first order modal vibration mode diagram of the mandrel when being constrained according to the prior art.

[0018] Figure 2 The second order modal vibration mode diagram of the mandrel when being constrained according to the prior art.

[0019] Figure 3 The third order modal vibration mode diagram of the mandrel when being constrained according to the prior art.

[0020] Figure 4 The first order modal vibration mode diagram of the mandrel when being constrained according to the device shown in the drawings of the present application.

[0021] Figure 5 The second order modal vibration mode diagram of the mandrel when being constrained according to the device shown in the drawings of the present application.

[0022] Figure 6 The third order modal vibration mode diagram of the mandrel when being constrained according to the device shown in the drawings of the present application.

[0023] Figure 7 The partial front view of the needle punching machine.

[0024] Figure 8 The partial isometric view of the needle punching machine.

[0025] Figure 9 The partial front view of the needle punching machine. Figure 8 The enlarged view of A in the partial front view.

[0026] Figure 10 The partial front view of the needle punching machine. Figure 8 The enlarged view of B in the partial front view.

[0027] Figure 11 The structure diagram of the shaft coupling. DETAILED DESCRIPTION

[0028] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the drawings of the specification.

[0029] In the following description, a lot of specific details are set forth in order to provide a thorough understanding of the present application, however, the present application can be practiced in other ways that are different from those described herein without departing from the spirit of the present application, and those skilled in the art can make similar generalizations without departing from the connotation of the present application, therefore, the present application is not limited to the specific embodiments disclosed below.

[0030] Secondly, the "one embodiment" or "embodiment" referred to herein means that the specific features, structures or characteristics can be included in at least one implementation of the present application. "In one embodiment" appearing in different places in the specification does not mean the same embodiment, nor does it mean that the embodiment is mutually exclusive with other embodiments.

[0031] Embodiment 1

[0032] Reference Figures 1-7 For the first embodiment of the present application, the embodiment provides a mandrel connecting device, the mandrel connecting device comprising a locking bearing 100 and a shaft coupling 200.

[0033] Specifically, the locking bearing 100 is sleeved on the higher end of the mandrel, and the locking bearing 100 can fix the mandrel in its axial direction, so that it can only rotate in the circumferential direction and cannot move axially.

[0034] The shaft coupling 200 is arranged at the other end of the mandrel, and the mandrel is connected with the driving motor through the shaft coupling 200, that is, the driving motor drives the mandrel to rotate through the shaft coupling 200.

[0035] In the embodiment, the roller limiting device in the prior art is replaced by the locking bearing 100, so that the mandrel adjusting and installing is simple, gapless and movable, and the shaft length is adjustable.

[0036] The mode that the mandrel is directly connected with the output end of the driving motor in the prior art is replaced by the connection through the shaft coupling 200, so that the torque loss is small, the rotation gap is small, the structure is simple and easy to process, and the shaft length is adjustable according to the length of the mold, and the replacement is simple.

[0037] Preferably, the locking bearing 100 can be selected from SKF deep groove ball bearings, model number: 61909-2RS1; inner diameter: 45mm; outer diameter: 68mm; width: 12mm; basic rated load: 14.1KN.

[0038] The embodiment also provides a simulation test to verify the beneficial effects of the present application.

[0039] (1) The working condition of the test is:

[0040] 1) Needling method: vertically needling from the upper end of the mold normal line to the lower end

[0041] 2) Needle frequency: 60~250 times / min, needle frequency is 1-4.16Hz.

[0042] 3) Core mold main shaft speed: 2~120 revolutions / min, rotation frequency is 0.03-2Hz.

[0043] 4) Needle plate load: needle plate is full of 2574 needles, each needle has a piercing force of 0.5kg, and a coefficient of 1.5.

[0044] 5) Total load: 2574*0.5*1.5=1930.5kg.

[0045] (2) Model of mandrel:

[0046] The existing mandrel has an outer diameter of 70mm and an inner diameter of 60mm. The minimum outer diameter of the workpiece is 140mm, and the minimum distance between the needle tip and the outer diameter of the mandrel is 23mm. The outer radius of the workpiece is 70-35=35mm, and the existing device diagram shows that the needle piercing thickness is 12mm-23mm=35mm. Assuming that the maximum allowable value of the outer diameter of the mandrel is 116mm. Assuming the needle piercing thickness is 20mm. Without interfering with the needle tip, the maximum allowable value of the outer diameter of the mandrel is 100mm. Considering the thickness of the workpiece connecting wood mold, the outer diameter is as small as possible. The design of the outer diameter needs to consider the feasibility of the design of the connecting disc device.

[0047] (3) Modal analysis:

[0048] The left end of the mandrel is supported by four rollers, and the left end of the mandrel shaft has no good constraint, which is used to simulate the gap between the roller and the mandrel shaft. The modal analysis results are shown in Figures 1-3 . The specific vibration mode corresponds to the natural frequency as shown in Table 1.

[0049] Table 1 Modal analysis results of mandrel

[0050] Constraint 1st natural frequency 2nd natural frequency No good constraint at left end of mandrel 5.98 Hz 38.4 Hz Good constraint at left end of mandrel 44.2 Hz 121 Hz

[0051] From the analysis results in Table 1, the first order natural frequency of the mandrel is 5.98Hz, which is close to the highest needle piercing frequency of 4.16Hz, so according to the modal theory, during the operation of the equipment, a large amplitude may occur.

[0052] When the left end of the mandrel has good constraints, this boundary condition is used to simulate the case where the left side of the mandrel shaft has good constraints. The modal analysis results are shown in Figures 4-6 . The specific vibration mode corresponds to the natural frequency as shown in Table 1.

[0053] From the analysis results in Table 1, the first order natural frequency of the mandrel is 44.2Hz, which is a large increase compared to the first case, and is much higher than the needle piercing frequency. As can be seen, the performance of the equipment can be improved by improving the constraint conditions of the mandrel shaft.

[0054] Embodiment 2

[0055] With reference to Figures 7-11 For the second embodiment of the utility model, the embodiment is based on the previous embodiment.

[0056] Specifically, the locking bearing 100 is fixed on the upper surface of the first base 300, and a first rotating shaft 301 is also fixedly connected on the lower surface of the first base 300. The first base 300 is fixed at the middle position of the first rotating shaft 301.

[0057] A first bearing 401 is also fixedly installed on the upper surface of the first swing base 400 at both ends. The two ends of the first rotating shaft 301 pass through the first bearing 401. Thus, the first swing base 400 can swing with the end of the mandrel.

[0058] A shaft coupling 200 is installed on the other end of the mandrel. Specifically, the shaft coupling 200 includes a connecting column 201 and a connecting flange 202. The connecting column 201 is a hollow cylinder, and has a cutout in the radial direction, and the positions on both sides of the cutout can be pressed by bolts. That is, one end of the main shaft 500 is inserted into the connecting column 201, and then the bolts are tightened to fix the connecting column 201 and the main shaft together, which can be selected together. The connecting flange 202 is fixed on the other end of the connecting column 201, and the connecting flange 202 is a double-cut flange, which can be connected with the flange at the end of the mandrel.

[0059] Preferably, a main shaft box 501 is further arranged between the shaft coupling 200 and the driving motor, and the main shaft 500 passes through the main shaft box 501 and is connected with the driving motor. The main shaft box 501 holds the main shaft 501 to make the force uniform, the torque transmission of the driving motor is uniform, and the driving motor is not easy to be damaged; large-diameter precision ball bearings are used on the two end faces of the main shaft box 501, the fulcrum between the bearings on the front and rear two end faces is relatively long, the rigidity of the shaft is stable, the installation is simple, and maintenance is free.

[0060] In addition, the main shaft box 501 is fixed on the second base 502, and the driving motor can also be fixed on the second base 502 through a support. The bottom of the second base 502 is fixed with a second rotating shaft 503, and the two ends of the second rotating shaft 503 are installed with second bearings 505. The second bearings 505 are fixedly installed on the top of a second swing base 504, and the second base 502 can rotate within a certain angle.

[0061] Embodiment 3

[0062] With reference to Figures 7-11 For the third embodiment of the utility model, the embodiment is based on the previous two embodiments. The needle punching machine provided in the embodiment not only includes the mandrel connecting device in the above two embodiments, but also includes:

[0063] The first adjusting assembly 600 is arranged at one end of the mandrel close to the locking bearing 100, and comprises two parallel vertical slide rails 601 and a moving base 602 which can slide on the slide rails 601. The moving base 602 cooperates with a first lead screw 604, and a first adjusting motor 603 drives the first lead screw 604 to rotate through a transmission gear box, thereby adjusting the height of the moving base 602. It should be noted that the transmission gear box between the first adjusting motor 603 and the first lead screw 604 is a prior art, and the specific structure is not shown, and those skilled in the art can clearly understand its structure.

[0064] The first swing base 400 is fixed on the moving base 602, so when the height of the moving base 602 is adjusted and changed, the height of the locking bearing 100 will also be adjusted, thereby adapting to the inclination angle of the mandrel.

[0065] The second adjusting assembly 700 is arranged at the bottom of the mandrel and is used for adjusting the height of the mandrel. Specifically, it comprises four second lead screws 701 arranged in a square layout, and four frames 702 at the corners which cooperate with the second lead screws 701. The second lead screws 701 are driven by a second adjusting motor through a transmission gear box.

[0066] The third adjusting assembly 800 is installed on the frame 702 and close to the coupling 200. It mainly comprises an elongated rod 801 and a third swing base 802. The elongated rod 801 is driven by a third adjusting motor, and one end thereof is hinged to the second base 502. When the elongated rod 801 moves in the third swing base 802, the angle of the second base 502 will be adjusted. It should be noted that the cooperation form between the elongated rod 801 and the third adjusting motor can be rack and pinion cooperation, that is, the elongated rod 801 has a uniform row of teeth along its length direction, and a gear is installed on the output end of the third adjusting motor, which rotates to drive the elongated rod 801 to elongate or shorten. The third swing base 802 is hinged to the frame 702 through a bearing.

[0067] It should be noted that the whole needle punching machine can also be installed on a horizontally movable platform, thereby facilitating the adjustment of the position. The horizontally movable platform is a prior art, and will not be described here.

[0068] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application and are not limiting. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced equivalently without departing from the spirit and scope of the technical solutions of the present application, and they should be covered in the scope of the claims of the present application.

Claims

1. A mandrel connection device, characterized by: Comprising, A locking bearing (100) is sleeved on one end of the mandrel to fix the axial position of the mandrel; A shaft coupling (200) is arranged on the other end of the mandrel, and the mandrel is connected with the output end of a driving motor through the shaft coupling (200).

2. The mandrel coupling device of claim 1, wherein: The locking bearing (100) is fixedly arranged on the surface of a first base (300), and a first rotating shaft (301) is also fixedly arranged on the other surface of the first base (300) relative to the locking bearing (100).

3. The mandrel coupling apparatus of claim 2, wherein: A first swing base (400) is further included, and two first bearings (401) are arranged on the surface of the first swing base (400) at intervals, and the first rotating shaft (301) is arranged between the two first bearings (401) and axially fixed at both ends.

4. The mandrel coupling device of claim 3, wherein: The shaft coupling (200) includes a connecting column (201) and a connecting flange (202) fixedly connected with the end of the connecting column (201), and the connecting column (201) is provided with a radial notch.

5. The mandrel coupling apparatus of claim 4, wherein: A main shaft (500) and a main shaft box (501) are further included and arranged between the shaft coupling (200) and the output end of the driving motor, the main shaft (500) passes through the main shaft box (501), one end of the main shaft (500) is connected with the shaft coupling (200), and the other end is connected with the output end of the driving motor.

6. The mandrel coupling apparatus of claim 5, wherein: The main shaft box (501) is fixedly arranged on the surface of a second base (502), and a second rotating shaft (503) is also fixedly arranged on the other surface of the second base (502) relative to the main shaft box (501).

7. A mandrel coupling device as claimed in claim 6, wherein: A second swing base (504) is further included, and two second bearings (505) are arranged on the surface of the second swing base (504) at intervals, and the second rotating shaft (503) is arranged between the two second bearings (505) and axially fixed at both ends.

8. A needle loom characterized by: The mandrel connecting device as claimed in claim 7 further includes, A first adjusting assembly (600) is arranged on one end close to the locking bearing (100), and includes a sliding rail (601) and a moving seat (602), the moving seat (602) is in sliding fit with the sliding rail (601), and the first swing base (400) is fixedly arranged on the moving seat (602); A second adjusting assembly (700) is arranged at the bottom of the mandrel, and includes a second lead screw (701) and a frame (702) matched with the second lead screw (701); A third adjusting assembly (800) is arranged on the frame (702) and close to one end of the shaft coupling (200), and includes an elongated rod (801) and a third swing base (802).

9. The needle loom of claim 8, wherein: The first adjusting assembly (600) further includes a first adjusting motor (603) and a first lead screw (604), the first adjusting motor (603) is used to drive the first lead screw (604), and the first lead screw (604) is matched with the moving seat (602) to adjust the height of the moving seat (602).

10. The needle loom of claim 9, wherein: One end of the elongated rod (801) is hinged with the second base (502), and the third swing base (802) is hinged with the frame (702).

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