A screw-on press machine

Abstract

The present invention provides a screw-on press machine, which is used for press-fitting a bearing sleeved on a workpiece, and comprises: a press mechanism, comprising a shell and a pressure head, the shell is hollow inside and open at one end, the pressure head is hollow inside and open at both ends, one end of the pressure head is detachably fixedly connected to the open end of the shell and communicated with the shell; a fixing mechanism, comprising a rotating guide seat, a reaction force connection seat, a nut rotating seat, a force nut and a fixed sleeve, the rotating guide seat is built into the pressure head and is hollow inside and open at both ends, the reaction force connection seat is built into the rotating guide seat and a clamping gap is formed between the rotating guide seat and the rotating guide seat, the nut rotating seat is sleeved on the outer wall of the rotating guide seat, one end of the force nut is threadedly connected to the nut rotating seat, and one end of the fixed sleeve is connected to the force nut; a driving member, one end of the driving member is slidably connected to the fixed sleeve and the other end is connected to the shell. The press machine of the present invention adopts a detachable pressure head, and different pressure heads can be replaced as needed.

Description

Technical Field

[0001] The invention relates to the technical field of press-fitting machines, and in particular to a screw-on press-fitting machine. Background Art

[0002] The press machine can be used for the correction process of shafts and other similar parts, as well as for the press fitting of shafts and sleeve parts and the stretching, forming and blanking of simple plate-shaped components. In the process of automobile assembly, the press machine is often needed to press the bearing into the wheel hub shaft diameter.

[0003] For example, patent CN212526756U provides a rotary press for heavy-duty truck wheel hub bearings, including a ball shell feeder, a crawler, a hydraulic press and a press unit. The ball shell feeder and the crawler add material to the press unit. The bearing locating seat and the ball shell positioning assembly in the press unit will fix the ball shell and the bearing, making it convenient for the rotating motor and the hydraulic rod in the press unit to rotate the bearing into the ball shell to complete the assembly process.

[0004] At present, most press machines are similar to the above-mentioned patent, and all adopt an integrated structure. The press structure cannot be replaced according to needs. When press-fitting bearings of different sizes, the press head at the front end of the press machine cannot be replaced. During the actual press-fitting process, the surface of the bearing may be damaged, affecting its working performance. Summary of the invention

[0005] In view of this, it is necessary to provide a screw-on press-fitting machine to solve the technical problem that the press-fitting machine in the prior art cannot replace the press-fitting head.

[0006] In order to achieve the above technical objectives, the technical solution of the present invention provides a screw-on press-fitting machine for press-fitting a bearing sleeved on a workpiece, which comprises:

[0007] The press-fitting mechanism comprises a shell and a press head, wherein the shell is hollow inside and has an opening at one end, and the press head is hollow inside and has openings at both ends, and one end of the press head is detachably fixedly connected to the open end of the shell and communicates with the shell;

[0008] The fixing mechanism comprises a rotating guide seat, a reaction force connection seat, a nut rotating seat, a force-bearing nut and a fixing sleeve, wherein the rotating guide seat is built into the pressure head and is hollow inside and has two ends with openings, the reaction force connection seat is built into the rotating guide seat and a clamping gap is formed between the rotating guide seat and the nut rotating seat, the nut rotating seat is sleeved on the outer wall of the rotating guide seat, one end of the force-bearing nut is threadedly connected to the nut rotating seat, and one end of the fixing sleeve is connected to the force-bearing nut;

[0009] A driving member, one end of which is slidably connected to the fixing sleeve and the other end of which is connected to the housing;

[0010] The workpiece can be inserted into the pressing head through the other end of the pressing head. When the workpiece is inserted into the clamping gap in the pressing head and fixed, the housing can be driven in reverse to move relative to the workpiece through the driving member to drive the pressing head to press the bearing on the workpiece.

[0011] Furthermore, the driving member is a hollow hydraulic cylinder, and the hydraulic cylinder is slidably sleeved on the fixed sleeve.

[0012] Furthermore, it also includes a rotating mechanism, which includes a transmission rod, a motor, a driving wheel, a driven wheel and a synchronous belt, one end of the transmission rod is passed through the fixed sleeve and connected to the nut rotating seat, the motor is built into the housing, the driving wheel is built into the housing and connected to the output end of the motor, the driven wheel is slidably sleeved on the other end of the transmission rod and is connected to the driving wheel through a synchronous belt, so as to drive the nut rotating seat to rotate so that the rotating guide seat can move relative to the workpiece.

[0013] Furthermore, a through hole is provided on the side wall of the reaction force connecting seat, and the reaction force connecting seat also includes a sensing mechanism, wherein the sensing mechanism includes a movable sensing coil, a signal transmitting coil, and a signal transmitting rod. The movable sensing coil is slidably sleeved on the reaction force connecting seat and is located in the clamping gap. The signal transmitting coil is built into the reaction force connecting seat. The signal transmitting rod passes through the transmission rod and is inserted into the reaction force connecting seat and connected to the signal transmitting coil. The movable sensing coil and the signal transmitting coil are both provided with threaded holes, and the movable sensing coil is connected to the signal transmitting coil by screws passing through the through hole.

[0014] Furthermore, it also includes an inductive sensor, which is arranged at the other end of the fixing sleeve.

[0015] Furthermore, it also includes an annular pressure sensor, which is connected to the inner wall of the fixed sleeve and is arranged relative to the hydraulic cylinder.

[0016] Furthermore, it also includes a hand-held mechanism, which includes a front handle and a rear handle, and the front handle and the rear handle are respectively arranged at two ends of the shell.

[0017] Furthermore, it also includes a display screen, which is arranged on the top of the shell.

[0018] Furthermore, it also includes a hanging ring, which is arranged on the top of the shell.

[0019] Furthermore, it also includes a button, which is arranged on the front handle.

[0020] Compared with the prior art, the beneficial effects of the present invention include: the press machine of the present invention adopts a detachable press head, and different press heads can be replaced according to different bearings. Different products use corresponding press heads, which can better complete the press fitting and ensure the working performance of the product, and prevent unnecessary damage to the product; the press head is installed on the outer shell, and a fixing mechanism is used to clamp the workpiece, and then the driving member drives the shell in reverse to drive the press head to move relative to the workpiece, thereby driving the press head to abut the bearing on the workpiece, and then press the bearing. The press head is disassembled and assembled on the outer shell without affecting the internal structure and function of the press machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of a screw-on press machine according to an embodiment of the present invention;

[0022] Figure 2 1. It is a top view of a screw-on press machine according to an embodiment of the present invention;

[0023] Figure 3 is a cross-sectional view of a screw-on press machine according to an embodiment of the present invention;

[0024] Figure 4 It is a structural schematic diagram of a fixing mechanism and a sensing mechanism in a screw-on press machine provided in an embodiment of the present invention;

[0025] Figure 5 It is a schematic structural diagram of a rotating mechanism in a screw-on press machine provided in an embodiment of the present invention;

[0026] Figure 6 It is a schematic structural diagram of a hydraulic cylinder in a screw-on press machine according to an embodiment of the present invention. DETAILED DESCRIPTION

[0027] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not used to limit the scope of the present invention.

[0028] Reference Figure 1 and Figure 2 The present invention provides a screw-on press-fitting machine, which solves the technical problem that the press-fitting machine in the prior art cannot replace the press-fitting head.

[0029] In order to achieve the above-mentioned technical objectives, the technical solution of the present invention provides a screw-on press machine for press-fitting bearings or seat ring-like interference fit parts mounted on a workpiece, which includes a press-fitting mechanism 1, a fixing mechanism 2 and a driving member 3, wherein the fixing mechanism 2 is built into the press-fitting mechanism 1, and the driving member 3 is built into the press-fitting mechanism 1 and is simultaneously connected to the press-fitting mechanism 1 and the fixing mechanism 2.

[0030] One end of the press-fitting mechanism 1 is open, which facilitates the insertion of the workpiece into the press-fitting mechanism 1, so that the fixing mechanism 2 can fix the workpiece, and the driving member 3 is used to drive the press-fitting mechanism 1 to move relative to the workpiece until the press-fitting mechanism 1 abuts against the bearing on the workpiece and completes the press-fitting of the bearing. Sufficient moving space is reserved between the fixing mechanism 2 and the driving member 3 to facilitate the press-fitting of the bearing by the press-fitting mechanism.

[0031] The pressing mechanism 1 includes a shell 11 and a pressing head 12. The shell 11 is hollow inside and open at one end. The pressing head 12 is hollow inside and open at both ends. One end of the pressing head 12 is detachably fixedly connected to the open end of the shell 11 and communicates with the shell 11. The fixing mechanism 2 is installed in the pressing head 12, and the driving member 3 is installed in the shell 11.

[0032] Reference Figure 3 and Figure 4 The fixing mechanism 2 includes a rotating guide seat 21, a reaction force connecting seat 22, a nut rotating seat 23, a force nut 24 and a fixing sleeve 25. The rotating guide seat 21 is built into the pressure head 12 and is hollow inside and open at both ends. The reaction force connecting seat 22 is built into the rotating guide seat 21 and a clamping gap is formed between the rotating guide seat 21 and the rotating guide seat 21. The nut rotating seat 23 is sleeved on the outer wall of the rotating guide seat 21. One end of the force nut 24 is threadedly connected to the nut rotating seat 23, and one end of the fixing sleeve 25 is connected to the force nut 24; wherein the clamping gap formed between the rotating guide seat 21 and the rotating guide seat 21 is relative to the opening of the other end of the pressure head 12, and the rotating guide seat 21 and the rotating guide seat 21 are also provided with inclined ends on opposite sides, so as to facilitate the workpiece to be inserted from the open end of the pressure head 12 and fixed in the clamping gap.

[0033] Reference Figure 6 In the embodiment provided by the present invention, the driving member 3 is a hollow hydraulic cylinder, one end of the hydraulic cylinder 3 is slidably connected to the fixed sleeve 25, and the other end is connected to the housing 11. The workpiece can be inserted into the press head 12 through the other end of the press head 12. When the workpiece is inserted into the clamping gap in the press head 12 and fixed, the hydraulic cylinder 3 is started. At this time, the fixed sleeve 25 is in a fixed state, and the hydraulic cylinder 3 can be driven in the reverse direction to move relative to the fixed sleeve 25, thereby driving the housing 11 and the press head 12 to move relative to the workpiece until the press head 12 abuts against the side wall of the bearing and then the press-fitting of the bearing is completed.

[0034] Reference Figure 5The press also includes a rotating mechanism 4, which includes a transmission rod 41, a motor 42, a driving wheel 43, a driven wheel 44 and a synchronous belt 45. One end of the transmission rod 41 is penetrated by the fixed sleeve 25 and connected to the nut rotating seat 23. The motor 42 is built in the housing 11. The driving wheel 43 is built in the housing 11 and connected to the output end of the motor 42. The driven wheel 44 is slidably sleeved on the other end of the transmission rod 41 and connected to the driving wheel 43 through the synchronous belt 45. The motor 42 is started to drive the driving wheel 43. The wheel 43 rotates, and the driving wheel 43 drives the driven wheel 44 to rotate through the synchronous belt 45. The driven wheel 43 drives the transmission rod 41 to rotate, and the transmission rod 41 drives the nut rotating seat 23 to rotate relative to the force nut 24. The force nut 24 is fixed to the housing 11 through the fixing sleeve 25 and the hydraulic cylinder 3. At this time, the nut rotating seat 23 can move relative to one end of the force nut 24, thereby driving the rotating guide seat 21 and the reaction force connecting seat 22 to move relative to the workpiece, so that the workpiece can be inserted into the clamping gap between the rotating guide seat 21 and the reaction force connecting seat 22 until it cannot move.

[0035] Reference Figure 3 and Figure 4 A through hole is provided on the side wall of the reaction force connection seat 22. The press also includes a sensing mechanism 5, which includes a movable sensing coil 51, a signal transmitting coil 52, and a signal transmitting rod 53. The movable sensing coil 51 is slidably sleeved on the reaction force connection seat 22 and is located in the clamping gap. The signal transmitting coil 52 is built into the reaction force connection seat 22. The signal transmitting rod 53 passes through the transmission rod 41 and is inserted into the reaction force connection seat 22 and connected to the signal transmitting coil 52. Both the movable sensing coil 51 and the signal transmitting coil 52 are provided with threaded holes. The movable sensing coil 51 is connected to the signal transmitting coil 52 by passing screws through the through hole. Among them, the signaling rod 53 is rotatably and slidably connected to the transmission rod, and the other end of the signaling rod 53 is fixed to the shell by a screw. When the motor drives the rotating guide seat 21 and the reaction force connecting seat 22 to move relative to the workpiece, the signaling rod 53 is in a stationary state, and its corresponding signaling circle 52 and movable induction circle 51 are also in a stationary state. However, the reaction force connecting seat 22 moves relative to the movable induction circle 22, so that the movable induction circle 51 reaches from one end of the through hole to the other end. When the workpiece is inserted into the clamping gap until it abuts against the movable induction circle 51, the workpiece is in a fixed state and cannot move anymore. The movable induction circle 51 transmits the information detected about the workpiece through the signaling circle 52 and the signaling rod 53 in sequence.

[0036] As a preferred embodiment, the press further includes an inductive sensor 6 , which is disposed at the other end of the fixed sleeve 25 and is used to detect movement information of the pressing head 12 .

[0037] As a preferred embodiment, the press machine further includes an annular pressure sensor 7, which is connected to the outer wall of the fixed sleeve 25 and arranged relative to the hydraulic cylinder 3, and is used to monitor the movement information of the hydraulic cylinder 3. The side wall of the annular pressure sensor is provided with a baffle, and the baffle is provided with a sensor mounting bracket. The annular pressure sensor is mounted on the sensor mounting bracket, and the annular pressure sensor is squeezed when the hydraulic cylinder moves.

[0038] As a preferred embodiment, the press machine further includes a hand-held mechanism 8, which includes a front handle 81 and a rear handle 82, which are respectively arranged at both ends of the housing 11, so that the operator can conveniently hold the press machine to complete the press installation of the bearing. A button 811 is also arranged on the front handle 81.

[0039] As a preferred embodiment, the press machine further includes a display screen 9, which is arranged on the top of the housing. The display screen is simultaneously connected to the motor, hydraulic cylinder, signaling rod, inductive sensor, annular pressure sensor and button, and the display screen can be used to display the detection information of the signaling rod, inductive sensor and annular pressure sensor, and can be used to prompt the operator to start the button to control the motor and hydraulic cylinder to complete the press fitting of the bearing.

[0040] As a preferred embodiment, the press machine further comprises a lifting ring 10, which is arranged on the top of the housing. In the embodiment provided by the present invention, the press machine is suspended in the air by a lifting device, and can be moved to the workpiece to be pressed as needed, without the need for manual handling of the press machine.

[0041] The working principle of the embodiment provided by the present invention is as follows: the press machine of the present invention is used for press-fitting bearings. When using the press machine, the bearing sleeve needs to be mounted on the workpiece first, the press machine is moved to the workpiece to be press-fitted by means of a lifting device, the workpiece is inserted into the press head from the open end of the press head, and when the workpiece is partially inserted into the clamping gap formed between the rotating guide seat and the reaction force connecting seat, the manual control button starts the motor, and the motor drives the rotating guide seat and the reaction force connecting seat to move relative to the workpiece, that is, the workpiece is further inserted into the clamping gap until it can no longer move, at which time the workpiece and the press machine can maintain a coaxial state, the active induction coil in the clamping gap detects the insertion of the workpiece and then transmits it to the display screen, the display screen prompts the operator to start the hydraulic cylinder control button, the hydraulic cylinder works to drive the reaction force connecting seat to continue to move relative to the workpiece, but at this time the reaction force connecting seat and the workpiece are in a locked state and cannot move, the hydraulic cylinder moves relative to the reaction force connecting seat, thereby driving the hydraulic cylinder and the housing to move relative to the workpiece in reverse, thereby driving the press head on the housing to move relative to the workpiece until it abuts against the bearing on the workpiece and completes the press-fitting of the bearing.

[0042] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A screw-on press machine for press-fitting a bearing sleeved on a workpiece, characterized in that: include: The press-fitting mechanism comprises a shell and a press head, wherein the shell is hollow inside and has an opening at one end, and the press head is hollow inside and has openings at both ends, and one end of the press head is detachably fixedly connected to the open end of the shell and communicates with the shell; The fixing mechanism comprises a rotating guide seat, a reaction force connection seat, a nut rotating seat, a force-bearing nut and a fixing sleeve, wherein the rotating guide seat is built into the pressure head and is hollow inside and has two ends with openings, the reaction force connection seat is built into the rotating guide seat and a clamping gap is formed between the rotating guide seat and the nut rotating seat, the nut rotating seat is sleeved on the outer wall of the rotating guide seat, one end of the force-bearing nut is threadedly connected to the nut rotating seat, and one end of the fixing sleeve is connected to the force-bearing nut; A driving member, one end of which is slidably connected to the fixed sleeve and the other end of which is connected to the housing; the driving member is a hollow hydraulic cylinder, and the hydraulic cylinder is slidably sleeved on the fixed sleeve; A rotating mechanism, the rotating mechanism comprising a transmission rod, a motor, a driving wheel, a driven wheel and a synchronous belt, one end of the transmission rod is penetrated by the fixed sleeve and connected to the nut rotating seat, the motor is built in the housing, the driving wheel is built in the housing and connected to the output end of the motor, the driven wheel is slidably sleeved on the other end of the transmission rod and connected to the driving wheel through a synchronous belt, so as to drive the nut rotating seat to rotate so that the rotating guide seat can move relative to the workpiece; The workpiece can be inserted into the pressing head through the other end of the pressing head. When the workpiece is inserted into the clamping gap in the pressing head and fixed, the housing can be driven in reverse to move relative to the workpiece through the driving member to drive the pressing head to press the bearing on the workpiece.

2. The screw-on press machine according to claim 1, characterized in that: The side wall of the reaction force connecting seat is provided with a through hole, and also includes a sensing mechanism, which includes a movable sensing coil, a signal transmitting coil, and a signal transmitting rod. The movable sensing coil is slidably sleeved on the reaction force connecting seat and is located in the clamping gap, the signal transmitting coil is built into the reaction force connecting seat, the signal transmitting rod passes through the transmission rod and is inserted into the reaction force connecting seat and connected to the signal transmitting coil. The movable sensing coil and the signal transmitting coil are both provided with threaded holes, and the movable sensing coil is connected to the signal transmitting coil by screws passing through the through hole.

3. The screw-on press machine according to claim 1, characterized in that: It also includes an inductive sensor, which is arranged at the other end of the fixing sleeve.

4. The screw-on press machine according to claim 1, characterized in that: It also includes an annular pressure sensor, which is connected to the inner wall of the fixed sleeve and is arranged relative to the hydraulic cylinder.

5. The screw-on press machine according to claim 1, characterized in that: It also includes a hand-held mechanism, which includes a front handle and a rear handle, and the front handle and the rear handle are respectively arranged at two ends of the shell.

6. The screw-on press machine according to claim 1, characterized in that: It also includes a display screen, which is arranged on the top of the shell.

7. The screw-on press machine according to claim 1, characterized in that: It also includes a hanging ring, which is arranged on the top of the shell.

8. The screw-on press machine according to claim 5, characterized in that: It also includes a button, which is arranged on the front handle.

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