Handheld assembly tool for interference press fitting of small plug-in and small socket

Abstract

A handheld assembly tool for interference press fitting of a small plug-in and a small socket comprises an installation support, a cam, a pressing head, an adjustable supporting rod, a handle, a pressing rod and a spring. The cam is provided with a front end part and a tail part, the front end part is hinged to the cam connecting part, the tail part is connected with a pressing rod, and the cam can rotate around a hinge point; the upper end of the pressure head is in contact with the cam, and the lower end of the pressure head abuts against the small plug-in; the spring is assembled between the pressure head and the mounting support; the adjustable supporting rod is in threaded connection with the lower end of the mounting support; the handle is fixed on the handle connecting part; an anti-disengagement check ring is further arranged, a pair of L-shaped sliding grooves are formed in the anti-disengagement check ring, and a pair of clamping heads are arranged on the pressing head. The interference press-fitting device has the advantages that interference press-fitting can be accurately controlled under the condition that no external power exists, and the yield reaches 98%; 2, the weight of the tool is only 0.68 kg, the operation is convenient, and the assembly efficiency is improved by 50%; 3, compatibility is good, the device is suitable for multi-model assembly parts, and rapid switching of the assembly parts of different models can be completed within 60 seconds. And 4, the manufacturing cost is low.

Description

TECHNICAL FIELD

[0001] The utility model belongs to mechanical assembly tool technical field, concretely relates to a handheld installation tool suitable for small -size spare interference fit assembly, especially for the press -in assembly of small -size plug -in and small -size socket. BACKGROUND

[0002] In the field of mechanical assembly technology, interference fit as a common connection method is widely used in the fixed assembly between precision parts. In the prior art, the mainstream assembly tools can be divided into two categories of hydraulic drive type and motor drive type, but both have significant limitations, which are difficult to meet the operation requirements in complex scenarios.

[0003] The hydraulic drive type tool completes the assembly by high pressure generated by the hydraulic system to push the pressure head, and the core problem is the complexity of the system. The integration of hydraulic pump, pipeline and control valve leads to large overall volume of the tool, especially in narrow space (such as internal cavity of equipment or densely laid mechanical structure), it is difficult to operate flexibly. In addition, the hydraulic system needs regular maintenance to prevent oil leakage, which not only increases the use cost, but also limits the application in clean environment (such as electronic component assembly workshop). More importantly, the dynamic response of hydraulic drive has hysteresis, which cannot realize real-time control of high-precision pressing force, and is easy to cause damage to the surface of parts or assembly out of place.

[0004] The motor drive type tool provides pressure through electric motor driving screw or gear mechanism, which improves the control accuracy to a certain extent, but is still limited by its own structural defects. The built-in motor and reduction mechanism significantly increase the weight of the tool, and long-time handheld operation is easy to cause fatigue, affecting the assembly stability. At the same time, its pressing stroke adjustment mainly depends on mechanical limiting device, and the adjustment range is limited and the operation is complicated, which is difficult to adapt to the assembly requirements of different interference amounts (such as from micron level precision instrument to millimeter level heavy mechanical lock). In addition, the pressure head and lock seat clamp of traditional tool are rigidly connected, which has poor adaptability to part size tolerance, and the mold needs to be frequently replaced or the clamp needs to be adjusted, which seriously restricts the assembly efficiency.

[0005] The above technical defects lead to the serious lack of applicability of existing tools in narrow space, high precision and multi-model mixed assembly scene. A small part interference fit assembly tool is needed in production, which can realize accurate control of pressing force without external power, self-adaptive adjustment of stroke, quick switching of multiple models, and high assembly efficiency. SUMMARY

[0006] The utility model wants to solve the technical problem to provide a handheld assembly tool for interference pressing of small plug-in and small socket.

[0007] The utility model discloses adopt following technical scheme, including: installation support, cam, pressure head, adjustable support rod, handle, pressure bar, spring, installation support is equipped with cam connecting portion, pressure head sleeve seat portion, handle connecting portion and tiger mouth portion, the cam is equipped with front end portion and tail, and the front end portion is hinged in cam connecting portion, and the cam can rotate around the hinge point, the pressure head and the inner circle size of pressure head sleeve seat portion match, and the upper end of pressure head is in contact with the cam, and the lower end of pressure head is used for abutting small -size insert, the spring is assembled between pressure head and pressure head sleeve seat portion, the adjustable support rod is screwed in tiger mouth portion lower extreme, the handle is fixed in handle connecting portion, the pressure bar is fixed in the tail of cam, the upper end of adjustable support rod is equipped with the recess that is matched with the shape of small -size socket, still be equipped with anti -drop check ring, and anti -drop check ring is covered in the lower end portion of pressure head, and one pair of L type sliding groove is equipped on anti -drop check ring, L type sliding groove includes axial sliding groove portion and arc bayonet, and the corresponding position on pressure head is equipped with a pair of clamping head that is matched with one pair of L type sliding groove.

[0008] The utility model discloses based on pure mechanical transmission principle, discard hydraulic or motor drive structure, provide the assembly interface through the tiger mouth portion of installation support, and spring can realize the automatic reset of pressure head, adjustable support rod passes through the nut height adjustment, and control pressure stroke, handle is used for holding the support, and pressure bar is used for exerting the pressure input torque. Form " torque input to cam conversion to pressure head execution to spring reset " complete force transmission chain, finally realizes the stable pressure package of small -size insert in the stroke range defined to adjustable support rod, and tiger mouth portion adapts different size parts, and the cam is hinged in cam connecting portion, and the torque of pressure bar is converted into the linear displacement of pressure head through the cam, and anti -drop check ring can prevent the small -size insert in assembly and come out, and the recess is used in the constraint and positioning small -size socket, realizes the accurate butt joint of small -size socket and small -size insert.

[0009] The utility model discloses a high -efficient solution scheme of interference fit assembly in narrow space and complex working condition is provided, and the working principle is as follows: 1. torque conversion mechanism: the compression rod is fixed in the cam tail, when the operator presses the compression rod, the down pressure moment is generated, the hinge point of the cam front end part and the cam connecting part forms the fulcrum, and the torque is transmitted to the curved surface of the cam and the pressure head contact, and the curved surface is further converted into the linear force of the pressure head downward, realizing the lever amplification effect of small operation force generating large pressure assembly force, 2. pressure assembly execution module: the pressure head and the inner circle of pressure head sleeve seat part are precisely matched, and the axial movement track is stable, the spring is precompressed and assembled between the pressure head and the pressure head sleeve seat part, when the compression rod is released, the spring tension drives the pressure head to reset to the initial position, and completes a pressure assembly cycle, 3. anti -drop locking function: the anti -drop check ring can prevent the small plug -in part in the assembly from being horizontally deviated or dropped under the pressure, 4. stroke adjustment system: the adjustable support rod is installed in the lower end of the tiger mouth part through the threaded connection, and the height of the adjustable support rod can be changed by rotating the nut, directly control the down pressure stroke H (H= the distance between the top end of the adjustable support rod and the initial position of the pressure head) of the pressure head, and adapts to the assembly demand of different strokes, 5. man -machine interaction design: the handle is fixed in the handle connecting part, and provides the holding fulcrum for the operator, and the space layout of the compression rod and the handle forms the structure of the similar forceps, meets the single -hand operation habit, ensures that the force direction is aligned with the pressure assembly axis, and avoids the tool jam caused by the eccentric load.

[0010] An improvement is that the curved surface of the cam 2 and the pressure head 3 is a involute type curved surface.

[0011] Another improvement is that the tail end of the handle 5 is provided with a anti -drop angle, and the anti -drop angle is matched with the ergonomic holding curve.

[0012] The utility model has the advantages of: 1. accurate control of pressure assembly force can be realized under the condition of no external power, and the design demand of high reliability is realized, the utility model realizes the interference precision pressure assembly of small plug -in part and small socket in narrow space, reduces the assembly misplacement risk, and the good product rate reaches 98%, 2. handheld tool light weight (tool weight 0.68kg), convenient operation, and assembly efficiency is improved by more than 50%, 3. stroke self -adaptation adjustment, 4. good compatibility is suitable for multiple models of assembly parts, and different model assembly parts can be switched in 60 seconds, 5. adopt modular structure, and the manufacturing cost is low. ACCURACY

[0013] Figure 1 It is the structure schematic diagram of one embodiment of the utility model.

[0014] Figure 2 It is the A-A section structure schematic diagram. Figure 1

[0015] Figure 3 It is the section structure schematic diagram of one embodiment of the utility model.​

[0016] Figure 4 The utility model discloses a three-dimensional structure schematic diagram for an embodiment.

[0017] Figure 5 For Figure 3 The partial enlarged structure schematic diagram (show the principle of anti -drop mechanism) of

[0018] Figure 6 The anti -drop baulk structure schematic diagram (anti -drop baulk is located upper position).

[0019] Figure 7 For Figure 6 The change structure schematic diagram (anti -drop baulk is located lower position) of

[0020] Among them: mounting support 1, cam 2, pressure head 3, adjustable support rod 4, handle 5, pressure rod 6, spring 7, cam connecting portion 8, pressure head sleeve seat portion 9, handle connecting portion 10, tiger mouth portion 11, small plug-in 12, small socket 13, nut 14, anti -drop baulk 15, recess 16, chuck 17, L type sliding groove 18, axial sliding groove portion 19, arc chuck 20, front end portion 21, tail portion 22. Specific implementation

[0021] As Figures 1-7 Shown, the utility model discloses an embodiment adopts following technical scheme, including mounting support 1, cam 2, pressure head 3, adjustable support rod 4, handle 5, pressure rod 6, spring 7, mounting support 1 is equipped with cam connecting portion 8, pressure head sleeve seat portion 9, handle connecting portion 10 and tiger mouth portion 11, cam 2 is equipped with front end portion 21 and tail portion 22, and front end portion 21 is hinged in cam connecting portion 8, and cam 2 can rotate around hinged point, pressure head 3 matches with the inner circle size of pressure head sleeve seat portion 9, and the upper end of pressure head 3 contacts with cam 2, and the lower end of pressure head 3 is used for abutting small plug-in 12, spring 7 is assembled between pressure head 3 and pressure head sleeve seat portion 9, adjustable support rod 4 is screw -threaded connection in tiger mouth portion 11 lower end, handle 5 is fixed in handle connecting portion 10, pressure rod 6 is fixed in the tail portion 22 of cam 2, adjustable support rod 4 upper end is equipped with recess 16 with small socket 12 shape matching, still be equipped with anti -drop baulk 15, and anti -drop baulk 15 is set in the lower end portion of pressure head 3, and anti -drop baulk 15 is equipped with a pair of L type sliding groove 18, and L type sliding groove 18 includes axial sliding groove portion 19 and arc chuck 20, and the corresponding position of pressure head 3 is equipped with a pair of chuck 17 with a pair of L type sliding groove 18 matching.

[0022] The utility model discloses a pure mechanical transmission principle is based on, abandon hydraulic or motor drive structure, provide assembly interface through the tiger mouth department 11 of installation support 1, and spring 7 can realize the automatic reset of pressure head 3, adjustable support rod 4 passes through the height of nut 14 adjustment, control pressure travel, handle 5 is used for holding support, pressure rod 6 is used for exerting pressure input torque. Form " torque input to cam conversion to pressure head execution to spring reset " complete force transmission chain, finally in the travel range of adjustable support rod 4 definition, realize the stable press fitting of small plug-in and small socket, the tiger mouth department 11 adapts different size parts, cam 2 is hinged in cam connecting portion 8, and the torque of pressure rod 6 is converted into the linear displacement of pressure head 3 through cam 2, and anti -drop check ring 15 can prevent the small plug-in 12 press fitting in assembling from falling out, and recess 16 is used in restraining and positioning small socket 13, realizes the accurate butt joint of small socket 13 and small plug-in 12.

[0023] Press fitting operation steps are as follows: first, place small socket 13 in the recess 16 of adjustable support rod 4, second step, place small plug-in 12 into the butt joint position between pressure head 3 and small socket 13, and anti -drop check ring 15 is normally under the upper position (clamping head 17 is clamped into arc-shaped clamping mouth 20), slightly rotate anti -drop check ring 15, and anti -drop check ring 15 is slid down to the lower stop point along the axial sliding groove part 19 of L-shaped sliding groove 18, and anti -drop check ring 15 covers small plug-in 12, third step, press down pressure rod 6, and cam 2 drives pressure head 3 to move down and complete assembly, and the operator releases hand and stops exerting force, and spring 7 drives pressure head 3 to automatically reset to the initial position, and completes a press fitting cycle.

[0024] The utility model discloses a high -efficient solution scheme can be provided for the interference fit assembly under the narrow space and complex working condition, and the working principle is as follows: 1. torque conversion mechanism: the pressure bar 6 is fixed in the cam 2 tail 22, and when the operator presses the pressure bar 6, generates the pressure torque, the hinge point of the cam 2 front end 21 and cam connecting portion 8 constitutes the fulcrum, and the torque is transmitted to the curved surface of the cam 2 and the pressure head 3 contact, and is further converted into the linear force of the pressure head 3 to the down, realizes the lever amplification effect of small operating force generating big pressure assembly force, 2. pressure assembly execution module: the pressure head 3 and the pressure head sleeve seat portion 9 inner circle precision cooperation, ensure the axial movement track stability, spring 7 precompression assembly is between the pressure head 3 and the pressure head sleeve seat portion 9, when the pressure bar 6 releases, the tension of spring 7 drives the pressure head 3 to reset to the initial position, completes a pressure assembly cycle, 3. anti -drop locking function: anti -drop baffle 15 can prevent the small -size insert 12 from escaping in assembly, 4. stroke adjustment system: adjustable support rod 4 is installed in the lower end of the tiger mouth portion 11 through the thread connection, and the height of adjustable support rod 4 can be changed by rotating the nut 14, directly control the pressure stroke H (H=the distance of adjustable support rod 4 top end and the initial position of pressure head 3) of pressure head 3, adapts the assembly demand of different stroke, 5. man-machine interaction design: handle 5 is fixed in handle connecting portion 10, provides the holding fulcrum for the operator, and the space layout of pressure bar 6 and handle 5 forms the structure similar to the forceps, meets the single-hand operation habit, ensures that the force direction is aligned with the pressure assembly axis, avoids the tool jam caused by partial load.

[0025] An improvement is that the curved surface of the cam 2 and the pressure head 3 contact is a involute type curved surface.

[0026] Another improvement is that the tail end of the handle 5 is provided with an anti-dropping corner, and the anti-dropping corner arc is matched with the ergonomic holding curve.

[0027] The utility model is not limited to the specific structure of the above-mentioned embodiment, and equivalent transformations of other similar structures fall within the protection scope of the utility model.

Claims

1. A hand-held assembly tool for interference press fitting of a small plug with a small socket, characterized in that The utility model relates to a kind of adjustable support rod for small plug-in socket, including: mounting support, cam, pressure head, adjustable support rod, handle, pressure rod, spring;The mounting support is equipped with cam connecting portion, pressure head sleeve seat portion, handle connecting portion and tiger mouth portion;The cam is equipped with front end portion and tail portion, and front end portion is hinged to cam connecting portion, and cam can rotate around hinged point;The pressure head is matched with the inner circle size of pressure head sleeve seat portion, and the upper end of pressure head is in contact with cam, and the lower end of pressure head is used to abut small plug-in;The spring is assembled between pressure head and pressure head sleeve seat portion;The adjustable support rod is screw-connected in the lower end of tiger mouth portion;The handle is fixed to handle connecting portion;The pressure rod is fixed to the tail portion of cam;The upper end of adjustable support rod is equipped with recess that is matched with the shape of small socket;Also equipped with anti-drop check ring, anti-drop check ring is sleeved in the lower end of pressure head, and a pair of L-shaped sliding groove is equipped on anti-drop check ring, and the L-shaped sliding groove includes axial sliding groove portion and arc-shaped bayonet, and the corresponding position on pressure head is equipped with a pair of clamping head matched with a pair of L-shaped sliding groove. The curved surface that the cam is in contact with pressure head is involute type curved surface.

2. A hand-held assembly tool for interference press fitting of small plug-in components into small receptacles according to claim 1, characterized in that The tail end of handle is equipped with anti-drop elbow, and the curvature of anti-drop elbow is matched with ergonomic holding curve.

3. A hand-held assembly tool for interference press fitting of small plug-in components into small receptacles according to claim 2, characterized in that: ​

Images