A self-aligning track-type impact massage movement

Abstract

The present invention relates to a self-aligning track type impact massage movement, including a core frame, a motor, an inclined shaft, a swing block, a universal joint, a connecting rod, an impact shaft and an impact sleeve; the motor and the impact sleeve are fixed at the two ends of the core frame respectively, the motor drives the inclined shaft to rotate, and drives the impact shaft to perform reciprocating linear motion along the impact sleeve through the swing block, the universal joint and the connecting rod; wherein: a guide mechanism is also provided, the guide mechanism includes a self-aligning rod and a track groove; the self-aligning rod is locked on the non-rotating moving part in the impact shaft transmission chain; the track groove is provided on the core frame, and constrains the movement direction of the self-aligning rod. The present invention forms a constraint on the reciprocating motion of the impact shaft through the coordination of the self-aligning rod and the track groove, which not only ensures the flexibility of the movement of each component, reduces unnecessary wear, but also solves the difficulty of processing and assembly. The overall structure has the characteristics of compact structure, flexible movement coordination, low noise and no twisting.

Description

Technical field:

[0001] The invention belongs to the field of massage equipment, and in particular relates to a self-aligning track type impact massage movement, in particular to a transmission scheme for converting the rotary motion of a motor into reciprocating linear motion. Background technology:

[0002] The existing fascia gun evolved from the traditional eccentric massage hammer. The transmission scheme is that the motor drives the eccentric shaft on the eccentric wheel to rotate, directly or indirectly driving the impact shaft constrained at one end to reciprocate. The direct drive scheme has a compact structure, but the impact shaft performs a swinging reciprocating motion. The indirect drive, that is, the eccentric shaft passes through a connecting rod and then indexes the impact shaft, so that the impact shaft performs a linear reciprocating motion in the sleeve. For this reason, indirect drive through the connecting rod has become the current mainstream solution. The industry is not satisfied with this, and has introduced the principle of universal shaft transmission into the field of fascia guns to further optimize the structural performance.

[0003] For example: Patent application No. 202010029076.2 discloses a fascia gun movement and a working method thereof, wherein the fascia gun movement comprises a motor, a crank shaft, a rocker arm, a shaft block, a rocker arm shaft, a left connecting rod, a right connecting rod, a sleeve shaft and a sliding sleeve. The horizontal rear end portion of the crank shaft is fixedly sleeved on the output shaft of the motor, the lower end portion of the rocker arm is rotatably sleeved on the inclined front end portion of the crank shaft, the center hole of the shaft block is rotatably sleeved on the upper end portion of the rocker arm, the rocker arm shaft is transversely penetrated at the rear of the shaft block, the rear ends of the left connecting rod and the right connecting rod are correspondingly rotatably sleeved on the left and right ends of the rocker arm shaft, the left and right ends of the sleeve shaft are correspondingly transversely penetrated on the front ends of the left connecting rod and the right connecting rod, and the rear end portion of the sliding sleeve is movably sleeved in the middle of the sleeve shaft. The mechanism is pulled by connecting rods symmetrically arranged on the left and right sides and constrained by a pair of symmetrical supporting rods. There are many connecting rods and axis points, which not only makes assembly difficult, but also makes it difficult to make the two sides precisely symmetrical, which can easily cause unbalanced twisting, resulting in wear and noise.

[0004] Another example: Patent application No. 2020104884026.2 discloses a fascia gun transmission mechanism, including a motor, a mounting plate, an eccentric shaft, a universal shaft A, a universal shaft B, a universal shaft C, a piston rod and a piston seat; the universal shafts all include bearings and connecting parts, the motor is fixed on the mounting plate, the rear end of the eccentric shaft is fixed on the motor shaft, and the front end is fixedly connected to the bearing of the universal shaft A; the universal shaft A connecting part is fixedly connected to the bearing of the universal shaft B, the universal shaft B connecting part is fixedly connected to the bearing of the universal shaft C, and the universal shaft C connecting part is also connected to the rear end of the piston rod through a bearing; the piston rod body extends into the piston seat, and the front end extends out of the piston seat, which can be detachably connected to the massage head of the fascia gun; the piston seat is fixed to the front end of the shell, and there are matching constrained ridges and grooves between the two to prevent the piston rod from twisting with the universal shaft, which affects the comfort of the massage head contacting the human body. Although this solution is simple, the processing amount of the piston rod and the piston seat is large, and they are easy to wear, and it is difficult to reinforce them with wear-resistant materials.

[0005] How to overcome the defects in the prior art and provide a solution that is easier to assemble and more wear-resistant has become the research object of the present invention. Summary of the invention:

[0006] The purpose of the present invention is to design a self-aligning track type impact massage movement which can restrain the torsion of an impact shaft by cooperating with a centering rod and a track groove.

[0007] The technical solution of the present invention is implemented as follows: a self-aligning track type impact massage movement, including a core frame, a motor, an inclined shaft, a swing block, a universal joint, a connecting rod, an impact shaft and an impact sleeve; the motor and the impact sleeve are fixed at the two ends of the core frame respectively, the impact shaft is movably inserted into the impact sleeve, one end of which extends out of the impact sleeve for positioning the massage head, and the rear end is hinged with the connecting rod; the inclined shaft is locked on the output shaft of the motor, the swing block is fixed on the inclined shaft through a bearing, the shaft protrusion on the swing block is connected to the universal joint through a bearing, and the universal joint is hinged with the connecting rod; it is characterized in that: a guiding mechanism is also provided, the guiding mechanism includes a self-aligning rod and a track groove; the self-aligning rod is locked on a non-rotating moving part in the impact shaft transmission chain, and the moving part refers to the impact shaft, the connecting rod, the swing block or the universal joint; the track groove is provided on the core frame, one end of the self-aligning rod extends into the track groove, and is constrained by the track groove to move only along the direction set by the track groove.

[0008] The track groove includes a groove frame, a rail seat and a sliding core; a pair of the sliding cores are embedded in the rail seat in parallel, and the distance between the two sliding cores can accommodate the lower centering rod; the groove frame and the core frame are integrally formed or the groove frame is screwed to the core frame to form a whole, and a long slot hole for embedding the rail seat is formed on the groove frame, and the rail seat is screwed to the groove frame.

[0009] The self-aligning rod is inserted and fixed on the connecting rod, and the groove frame is integrally formed at the front part of the core frame. A pair of sliding cores in the rail seat are cylindrical structures, and the center line is parallel to the center line of the impact shaft; the connecting rod is in a Y-shaped structure, with a separate main fork arm and a secondary fork arm, and the secondary fork arm is locked on the main fork arm by bolts; the main fork arm has a handle, which is used to insert and fix the self-aligning rod; the forked parts of the main fork arm and the secondary fork arm are hinged on the ear shafts symmetrical on both sides of the universal joint; the universal joint is in the shape of a saddle, with an axial hole in the middle for the swing block shaft to pass through, and symmetrical ear shafts on both sides, the ear shafts on both sides are coaxial, and the axis center line is perpendicular to the axis center line of the axis hole.

[0010] The self-aligning rod is inserted and fixed in the radial direction of the impact shaft, the groove frame is integrally formed at the front part of the core frame, a pair of sliding cores in the rail seat are cylindrical structures, and the center line is parallel to the center line of the impact shaft; there are two connecting rods, one end of which is symmetrically clamped at the rear end of the impact shaft and hinged through a hinge shaft, and the other end is symmetrically clamped at both sides of the universal joint and hinged on the symmetrical ear shafts on both sides of the universal joint; the universal joint is saddle-shaped, with an axial hole in the middle for the swing block shaft to pass through, and symmetrical ear shafts on both sides, the ear shafts on both sides are coaxial, and the axis center line is perpendicular to the axis center line of the axis hole.

[0011] The self-aligning rod is inserted and fixed on the universal joint, and the slot frame is an arc structure. The rear end is inserted into the transverse positioning hole of the core frame, and the front end is locked on the longitudinal screw column of the core frame by screws; the rail seat and a pair of sliding cores embedded in the rail seat are both arc-shaped and match the slot frame, and the cross-section of the sliding core is a circular structure; the universal joint is saddle-shaped, with an axial hole in the middle for the swing block shaft to pass through and a self-aligning rod inserted, and symmetrical ear shafts are arranged on both sides, the ear shafts on both sides are coaxial, and the axis centerline is perpendicular to the axis centerline of the axis hole; one end of the connecting rod is hinged on the ear shafts on both sides of the universal joint, and the other end is hinged to the impact shaft through a hinge shaft.

[0012] The rear end of the impact sleeve is connected with a flange, and a vibration-damping sleeve is sleeved on the outer surface and the outer side of the flange, and is locked on the front end of the core frame by means of a pressure cover.

[0013] The sliding core in the track groove is a Teflon polished rod, or a polished rod with a Teflon coating on the surface, or a hard wear-resistant polished rod with a smooth surface; and the rail seat in the track groove is formed by elastic material.

[0014] The present invention forms a constraint on the reciprocating motion of the impact shaft by cooperating the self-aligning rod and the track groove, which not only ensures the flexibility of the movement of each component, reduces unnecessary wear, but also solves the difficulty of processing and assembly. The overall structure has the characteristics of compact structure, flexible movement, low noise and no twisting. Description of the drawings:

[0015] The present invention will be further described below in conjunction with specific illustrations:

[0016] Figure 1 Schematic diagram of the impact massage movement of Example 1

[0017] Figure 2 Schematic diagram of the cross section of the impact massage movement of Example 1

[0018] Figure 3 A schematic side view of the impact massage movement of Example 1

[0019] Figure 4 for Figure 3 Schematic diagram of the A-A section

[0020] Figure 5 Schematic diagram of the impact massage mechanism of Example 1

[0021] Figure 6 Schematic diagram of the impact massage movement of the second embodiment

[0022] Figure 7 This is a cross-sectional diagram of the impact massage movement of Example 2

[0023] Figure 8 Schematic diagram of the impact massage movement of Example 3

[0024] Fig. 9 This is a schematic diagram of the impact massage mechanism of Example 3.

[0025] in

[0026] 1—core frame 11—pressure cover 12—positioning hole 13—longitudinal screw column

[0027] 2—motor 21—oblique shaft 3—swing block 31—shaft convex

[0028] 4—Universal joint 41—Trunnock 42—Axis hole 5—Connecting rod

[0029] 51 - articulated shaft 52 - main fork arm 521 - handle 53 - secondary fork arm

[0030] 6—impact shaft 61—impact sleeve 62—flange 63—vibration damping sleeve

[0031] 7—bearing 8—guiding mechanism 81—centering rod 82—track groove

[0032] 821—slot frame 8211—long slot hole 822—rail seat 823—sliding core Specific implementation method:

[0033] Embodiment 1:

[0034] Reference Figures 1 to 5The self-aligning orbital impact massage movement comprises a core frame 1, a motor 2, an inclined core shaft 21, a swing block 3, a universal joint 4, a connecting rod 5, an impact shaft 6 and an impact sleeve 61; the motor 2 and the impact sleeve 61 are fixed at both ends of the core frame 1 respectively, the impact shaft 6 is movably arranged in the impact sleeve 61, one end extending out of the impact sleeve 61 is used for positioning the massage head, and the rear end is hinged with the connecting rod 5; the inclined core shaft 21 is locked on the output shaft of the motor 2 and performs rotational motion; the swing block 3 is fixed on the inclined core shaft 21 through a bearing 7, the shaft protrusion 31 on the swing block 3 is connected to the universal joint 4 through the bearing 7, and the universal joint 4 is hinged with the connecting rod 5, which converts the rotational power of the motor 2 into the forward and backward swing of the connecting rod 5, and pulls the impact shaft 6 to perform reciprocating linear motion, so as to realize the impact-type muscle relaxation action with the help of the massage head.

[0035] In order to ensure stable operation and reduce the problem of twisting of the impact shaft 6, a guiding mechanism 8 is further provided in the movement, which includes a self-aligning rod 81 and a track groove 82; the self-aligning rod 81 is locked on a non-rotating moving part in the impact shaft transmission chain, and the moving part refers to the impact shaft 6, the connecting rod 5, the swing block 3 or the universal joint 4; the track groove 82 is provided on the core frame 1, and one end of the self-aligning rod 81 extends into the track groove 82, and is constrained by the track groove 82 to only move in the direction set by the track groove, that is, consistent with the reciprocating motion direction of the impact shaft 6.

[0036] More specifically, the track groove 82 includes a groove frame 821, a rail seat 822 and a slide core 823; a pair of slide cores 823 are embedded in parallel on the rail seat 822, and the distance between the two slide cores 823 can accommodate the lower centering rod 81, that is, it plays a role of activity constraint; according to structural requirements, the groove frame 821 can be formed in one piece with the core frame 1, or it can adopt a split structure and be screwed to the core frame 1 to form an integral body, and the groove frame 821 is formed with a long slot hole 8211 for embedding the rail seat 822, and the rail seat 822 is screwed to the groove frame 821. The screws can be directly passed through the rail seat 822 for locking, and preferably the screws are still locked on one side of the groove frame 821, and the screw gasket is used to contact the edge of the rail seat 822 to form a fixed solution, such as Figure 4 and 5 .

[0037] The sliding core 823 is a Teflon polished rod, or a polished rod coated with a Teflon coating, or a hard wear-resistant polished rod with a smooth surface, which is lubricated and can reduce friction and noise. The centering rod 81 is also made of a hard material with a smooth surface, preferably cylindrical steel. In addition, the rail seat 822 in the track groove is formed of an elastic material, preferably rubber, which can effectively absorb the swing noise caused by the assembly tolerance of the components and the manufacturing error, that is, to achieve the effect of vibration reduction and energy absorption.

[0038] In this embodiment, the self-aligning rod 81 is selected to be inserted and fixed on the connecting rod 5, the groove frame 821 is integrally formed at the front part of the core frame 1, and a pair of sliding cores 823 in the rail seat 822 are cylindrical structures, and the center line is parallel to the center line of the impact shaft 6; the connecting rod 5 is designed as a Y-shaped structure, with a separate main fork arm 52 and a secondary fork arm 53, and the secondary fork arm 53 is locked on the main fork arm 52 by bolts to form a complete connecting rod; the main fork arm 52 has a handle 521, which is used to insert the self-aligning rod 81 and is hinged to the rear end of the impact shaft 6, that is, the rear end of the impact shaft 6 is processed with an open shaft ear, and the handle 521 is inserted into the open shaft ear, and the hinge is formed by the hinge shaft 51. The forked parts of the main fork arm 52 and the secondary fork arm 53 are hinged on the symmetrical ear shafts 41 on both sides of the universal joint 4; the universal joint 4 is saddle-shaped, with a shaft hole 42 in the middle for the swing block shaft to pass through, and symmetrical ear shafts 41 on both sides, the ear shafts 41 on both sides are coaxial, and the axis centerline is perpendicular to the axis centerline of the axis hole 42. This structure is compact, and the self-aligning rod 81 is arranged on the connecting rod 5, especially inserted and fixed on the handle 521, which can reduce the swing stroke, and take into account the impact shaft end and the universal joint end, avoiding multi-stage torsion.

[0039] In order to further reduce noise, the structure is also connected with a flange 62 at the rear end of the impact sleeve 61, and a vibration reduction sleeve 63 is sleeved on the outer surface of the impact sleeve and the outer side of the flange, and is locked to the front end of the core frame 1 by means of a pressure cover 11.

[0040] Embodiment 2:

[0041] Reference Figure 6 and Figure 7 The overall structure is the same as the above example, except that the self-aligning rod 81 is inserted and fixed in the radial direction of the impact shaft 6, and the groove frame 821 is integrally formed at the front part of the core frame 1, which improves the rigidity and strength and reduces the assembly amount; a pair of sliding cores 823 in the rail seat 822 are cylindrical structures, and the center line is parallel to the center line of the impact shaft 6; the self-aligning rod 81 actually only contacts the sliding core 823 tangentially, which is close to line contact, reducing the generation of resistance and noise.

[0042] In accordance with the structure of this embodiment, there are two connecting rods 5, one end of which is symmetrically clamped at the rear end of the impact shaft 6 and hinged through the hinge shaft 51, and the other end is symmetrically clamped at both sides of the universal joint 4 and hinged on the ear shafts 41 symmetrical on both sides of the universal joint; more specifically, the universal joint 4 is saddle-shaped, with an axial hole 42 in the middle for the swing block shaft protrusion 31 to pass through, and symmetrical ear shafts 41 on both sides. The ear shafts 41 on both sides are coaxial, and the axis centerline is perpendicular to the axis centerline of the axis hole 42, forming an orthogonal two-axis rotation relationship.

[0043] Embodiment three:

[0044] Reference Figure 8 and Fig. 9The overall transmission relationship is the same as the above two examples, except that the self-aligning rod 81 is inserted and fixed on the universal joint 4. Since the universal joint is a component with a large swing amplitude, the slot frame 821 is designed as an arc structure, the rear end is directly inserted into the horizontal positioning hole 12 formed on the core frame, and the front end is screwed to the longitudinal screw column 13 of the core frame; the rail seat 822 and a pair of sliding cores 823 embedded in the rail seat are both in an arc shape that matches the slot frame 821, and the cross-section of the sliding core 823 is a circular structure, which also achieves the purpose of reducing the contact surface with the self-aligning Xibaipo 81; the universal joint 4 is saddle-shaped, with an axial hole 42 in the middle for the swing block shaft to pass through and an aligning rod 81 inserted therein, and symmetrical ear shafts 41 are arranged on both sides, and the ear shafts 41 on both sides are coaxial, and the axis centerline is perpendicular to the axis centerline of the axis hole 42. One end of the connecting rod 5 is hinged to the trunnions 41 on both sides of the universal joint, and the other end is hinged to the impact shaft 6 through the hinge shaft 51. The connecting rod 5 can adopt the structure of the second embodiment or the structure of the first embodiment.

[0045] The self-aligning rod 81 is inserted and fixed on the central axis of the universal joint 4 to achieve the effect of force balance. It does not exclude the design of biasing to one side due to space needs, or using the end faces of the ear shafts 41 on both sides to resist the baffles set on both sides of the core frame 1, which can also achieve the purpose of self-alignment. In addition, the self-aligning rod 81 can also be integrated with the shaft protrusion 31 on the swing block to become a coaxial part thereof. In addition, the slot frame 821, the rail seat 822 and the sliding core 823 can still adopt the straight structure as in the above two examples, or be formed into one with the rear part of the core frame 1. These can be flexibly changed during design, but all are self-aligning track type solutions.

Claims

1. A self-aligning track-type impact massage movement, comprising a core frame (1), a motor (2), an inclined core shaft (21), a swing block (3), a universal joint (4), a connecting rod (5), an impact shaft (6) and an impact sleeve (61); the motor (2) and the impact sleeve (61) are fixed to the two ends of the core frame (1) respectively, the impact shaft (6) is movably arranged in the impact sleeve (61), one end of which extends out of the impact sleeve (61) for positioning the massage head, and the rear end is hinged to the connecting rod (5); the inclined core shaft (21) is locked on the output shaft of the motor (2), the swing block (3) is fixed on the inclined core shaft (21) through a bearing (7), the shaft protrusion (31) on the swing block is connected to the universal joint (4) through the bearing (7), and the universal joint (4) is hinged to the connecting rod (5); characterized in that: A guiding mechanism (8) is also provided, the guiding mechanism (8) comprising a self-aligning rod (81) and a track groove (82); the self-aligning rod (81) is locked on a non-rotating moving part in the transmission chain of the impact shaft (6), the moving part being the impact shaft (6), the connecting rod (5), the swing block (3) or the universal joint (4); the track groove (82) is provided on the core frame (1), one end of the self-aligning rod (81) extends into the track groove (82), and is constrained by the track groove (82) to move only in the direction set by the track groove (82), and the track groove (82) is consistent with the reciprocating direction of the impact shaft (6).

2. According to claim 1, a self-aligning track-type impact massage movement, characterized in that: The track groove (82) comprises a groove frame (821), a rail seat (822) and a slide core (823); a pair of the slide cores (823) are embedded in parallel on the rail seat (822), and the distance between the two slide cores (823) can accommodate the lower centering rod (81); the groove frame (821) and the core frame (1) are integrally formed or the groove frame (821) is screwed to the core frame (1) to form an integral body; a long slot hole (8211) for embedding the rail seat is formed on the groove frame (821), and the rail seat (822) is screwed to the groove frame (821).

3. A self-aligning track-type impact massage movement according to claim 1 or 2, characterized in that: The self-aligning rod (81) is inserted and fixed on the connecting rod (5); the groove frame (821) is integrally formed on the front part of the core frame (1); a pair of sliding cores (823) in the rail seat (822) are cylindrical structures, and the center line is parallel to the center line of the impact shaft (6); the connecting rod (5) is a Y-shaped structure, having a separate main fork arm (52) and a secondary fork arm (53); the secondary fork arm (53) is locked on the main fork arm (52) by bolts; the main fork arm (52) has a handle (521), The handle (521) is used to insert and fix the self-aligning rod (81); the forked parts of the main fork arm (52) and the secondary fork arm (53) are hinged on the symmetrical ear shafts (41) on both sides of the universal joint (4); the universal joint (4) is saddle-shaped, with a shaft hole (42) in the middle for the swing block shaft protrusion (31) to pass through, and symmetrical ear shafts (41) on both sides, the ear shafts (41) on both sides are coaxial, and the axis center line is perpendicular to the axis center line of the axis hole (42).

4. A self-aligning track-type impact massage movement according to claim 1 or 2, characterized in that: The centering rod (81) is inserted and fixed in the radial direction of the impact shaft (6), the groove frame (821) is integrally formed at the front part of the core frame (1), and a pair of sliding cores (823) in the rail seat (822) are cylindrical structures, and the center line is parallel to the center line of the impact shaft (6); the connecting rod (5) is two, one end of which is symmetrically clamped at the rear end of the impact shaft (6) and hinged through the hinge shaft (51), and the other end is symmetrically clamped at both sides of the universal joint (4) and hinged on the symmetrical ear shafts (41) on both sides of the universal joint (4); the universal joint (4) is saddle-shaped, with an axial hole (42) in the middle for the swing block shaft protrusion (31) to pass through, and symmetrical ear shafts (41) on both sides, the ear shafts (41) on both sides are coaxial, and the axis center line is perpendicular to the axis center line of the axis hole (42).

5. A self-aligning track-type impact massage movement according to claim 1 or 2, characterized in that: The self-aligning rod (81) is inserted and fixed on the universal joint (4); the slot frame (821) is in an arc structure, the rear end of which is inserted into the transverse positioning hole (12) of the core frame (1), and the front end is screwed to the longitudinal screw column (13) of the core frame (1); the rail seat (822) and a pair of sliding cores (823) embedded in the rail seat (822) are both in an arc shape that matches the slot frame (821), and the cross section of the sliding core (823) is a circular structure; The universal joint (4) is saddle-shaped, with a shaft hole (42) in the middle for the swing block shaft protrusion (31) to pass through and a self-aligning rod (81) inserted therein, and symmetrical ear shafts (41) are arranged on both sides, the ear shafts (41) on both sides are coaxial, and the axis center line is perpendicular to the axis center line of the shaft hole (42); one end of the connecting rod (5) is hinged to the ear shafts (41) on both sides of the universal joint (4), and the other end is hinged to the impact shaft (6) through a hinge shaft (51).

6. The self-aligning track-type impact massage movement according to claim 1, characterized in that: The rear end of the impact sleeve (61) is connected to a flange (62), and a vibration-damping sleeve (63) is sleeved on the outer surface and the outer side of the flange (62), and is locked to the front end of the core frame (1) by means of a gland (11).

7. The self-aligning track-type impact massage movement according to claim 2, characterized in that: The slide core (823) in the track groove (82) is a Teflon polished rod, or a polished rod with a Teflon coating on the surface, or a hard wear-resistant polished rod with a smooth surface; and the rail seat (822) in the track groove (82) is formed of an elastic material.

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