Smith machine with adjustable training angle

Abstract

A Smith machine with an adjustable training angle includes a base frame and a power rack. The power rack includes upright rails, a Smith bar slidably assembled on the upright rails, and suspension bars for suspending the Smith bar. The upright rails are fixedly connected to the suspension bars. One end of the power rack is rotatably connected to the base frame, and angle adjustment assemblies are arranged between the other end of the power rack and the base frame. Each angle adjustment assembly includes a slideway, formed on the base frame; a moving part, arranged on the power rack and being slidable along the slideway; and a locking mechanism, configured to selectively lock the moving part with respect to the base frame to fix the power rack at a current training angle.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This application claims priority to Chinese Patent Application No. 202620190208.2, filed on Feb. 9, 2026, and Chinese Patent Application No. 2026206650340, filed on May 12, 2026, which are hereby incorporated by reference in their entirety.TECHNICAL FIELD

[0002] The present disclosure belongs to the technical field of fitness equipment, in particular to a Smith machine with an adjustable training angle.BACKGROUND

[0003] Smith bars (Olympic bars) of existing Smith machines can usually only move straight up and down along a constant vertical trajectory, while different training movements have different requirements for the movement trajectory of human joints: some movements are suitable for a vertical trajectory, while others require a natural inclination depending on the body structure. For example, at the start of a deadlift, the body center of gravity shifts forward, resulting in a slightly forward-tilting force trajectory; during a bench press, the movement of the shoulder joints also requires a specific tilt angle of the barbell. The single vertical movement mode of the existing Smith machines not only fails to adapt to the actual trajectory requirements of different movements, but also easily leads to stiffness in movements and concentrated stress on joints, reducing the training effect and safety, and possibly increasing the risk of injury in long-term use.SUMMARY

[0004] To overcome the defects in the prior art, the present disclosure provides a Smith machine, which is provided with an adjustable-angle power rack to adapt to different training requirements of users.

[0005] The present disclosure is implemented by means of the following technical solution: A Smith machine with an adjustable training angle includes a base frame and a power rack arranged on the base frame, where the power rack includes upright rails, a Smith bar slidably assembled on the upright rails, and suspension bars for suspending the Smith bar, and the upright rails are fixedly connected to the suspension bars;

[0006] one end of the power rack is rotatably connected to the base frame, such that the power rack is able to rotate around rotary connecting points and form different training angles; angle adjustment assemblies are arranged between the other end of the power rack and the base frame; and each angle adjustment assembly includes:

[0007] a slideway, formed on the base frame;

[0008] a moving part, arranged on the power rack and being slidable along the slideway; and

[0009] a locking mechanism, configured to selectively lock the moving part with respect to the base frame to fix the power rack at a current training angle.

[0010] In use, first, users release the moving parts by means of the locking mechanisms; then, the users move the moving parts along the slideways according to personal training requirements; and after the power rack is adjusted to a suitable angle, the moving parts are locked with respect to the base frame by means of locking parts, so as to fix the power rack at the current training angle.

[0011] By means of the above design, during the rotational adjustment process of the power rack, the upright rails and the suspension bars always rotate synchronously, thus ensuring that the extension direction of the upright rails remains parallel to the extension direction of the suspension bars at any angle. Such a parallel relationship ensures that the Smith bar suspended on the suspension bars remains stable within the full angle range of the power rack, and the risk of dislocation or disengagement of the Smith bar is effectively prevented, thereby guaranteeing the safety of training. Moreover, the sliding fit structure between the moving parts and the slideways has guiding and limiting effects, and further improves the stability during the adjustment process and the safety of the overall structure. Users may adjust the training angle merely by controlling locking and unlocking of the locking mechanisms by means of a single motion, such that operation is easy and fast, and the user experience of the machine is improved.

[0012] In one embodiment of the present disclosure, at least two gear positions are arranged on an inner wall of the slideway in a spaced manner in a length direction of the slideway; the locking mechanism includes a drive part, the drive part is operable to drive the moving part to move; and when the moving part moves into one gear position, a training angle of the power rack is locked.

[0013] In one embodiment of the present disclosure, the drive part includes:

[0014] a handle, operated by a user;

[0015] a drive portion, connected between the handle and the moving part; and

[0016] an elastic element, directly or indirectly acting on the moving part to make the moving part tend to move towards the gear positions;

[0017] where the handle is operated by the user to drive the drive portion to overcome an acting force from the elastic element, so as to allow the moving part to move out of the gear position.

[0018] In this way, users may operate the handle to release the moving part, and operation is extremely convenient.

[0019] In one embodiment of the present disclosure, the handle is articulated to the power rack and is connected to the drive portion by means of a link, and two ends of the link are articulated to the handle and the drive portion, respectively.

[0020] The link improves the movability between the handle and the drive portion and avoids jamming.

[0021] In one embodiment of the present disclosure, limit slots are formed in the power rack, the moving parts extend through the limit slots and are movably arranged in the limit slots, and the limit slots limit movement trajectories of the moving parts.

[0022] In this way, the movement of the moving parts may be guided and limited to ensure that the moving parts will not deflect, thus guaranteeing that the moving parts easily engage into or disengage from the gear positions.

[0023] In one embodiment of the present disclosure, the handles are symmetrically arranged on two opposite sides of the base frame.

[0024] Because the power rack is typically provided with two bars, two handles need to be configured. By means of the symmetric arrangement of the handles, users can simultaneously grip the handles with both hands and apply force to the handles to complete angle adjustment of the entire power rack, and the synchronization is guaranteed.

[0025] In one embodiment of the present disclosure, the rotary connecting points of the power rack are arranged in a bottom load-bearing region of the base frame, and the angle adjustment assemblies are arranged in a top region of the base frame.

[0026] Because weight plates are often suspended on the Smith bar when the Smith bar is used, the above design is adopted to set load-bearing points of the power rack in the bottom load-bearing region of the base frame, so as to guarantee the safety of the power rack. Moreover, the angle adjustment assemblies are arranged in the top region of the base frame to ensure that the handles of the drive parts are also located in the top region, such that more space is reserved below for training of users.

[0027] In one embodiment of the present disclosure, the power rack is rotatably adjustable to make an absolute value of a maximum adjustable angle of a moving direction of the Smith bar with respect to a vertical surface not less than 0.5°.

[0028] In this way, different requirements for the angle of the Smith bar of diversified training movements (such as squat, bench press and deadlift) can be satisfied.

[0029] In one embodiment of the present disclosure, each suspension bar is provided with a plurality of suspension holes which are uniformly arranged in a spaced manner in a length direction of the suspension bar; sides, facing the Smith bar, of the suspension holes are open; and suspension members, to which hooks of the Smith bar are hooked, are arranged in the suspension holes.

[0030] The suspension holes, special for the suspension members, formed in the suspension bars are mainly used to solve additional technical problems caused by angle adjustment of the power rack. When the power rack is located at different tilt angles, the direction of gravity of the Smith bar and a load (weight plate) suspended on the Smith bar will change accordingly, resulting in a constant change of the force direction (force line) of training hooks acting on the suspension holes. Such a non-vertical load with a varying direction will lead to stress concentration on local edges of the suspension holes, and abnormal wear or even cracking of the edges of the suspension holes will be caused in long-term use, directly affecting the structural strength and service life of the suspension bars. The suspension members may be made from materials (e.g., alloy steel bushings) which are more wear-resistant than bar bodies of the suspension bars, and friction and load-bearing, that easily cause wear, are transferred from the bar bodies to the replaceable components; furthermore, the suspension members, as independent components, may be replaced separately after being worn, and maintenance or replacement of the entire suspension bars is not needed, thereby reducing the long-term maintenance cost and difficulty of the machine.

[0031] In one embodiment of the present disclosure, the base frame is provided with a functional extension arm, the functional extension arm is detachably fixed to the base frame and extends outward, a first traction assembly and a weight assembly connected to the first traction assembly or a suspension assembly used for suspending weight plates are arranged on the base frame, a second traction assembly is arranged on the functional extension arm, and the first traction assembly and the second traction assembly are detachably and fixedly connected.

[0032] By designing the external extension arm and the independent traction assembly, the Smith machine can also be used for other training movements (e.g., lat pull-down). In addition, the functional extension arms is detachably fixed, such that when pull training is not needed, the functional extension arm may be detached to save space.

[0033] In one embodiment of the present disclosure, the drive portion is a rod structure extending in a length direction of the corresponding suspension bar and located inside the corresponding suspension bar;

[0034] a bar body of each suspension bar is provided with a first guide slot and a second guide slot, which extend in a length direction of the suspension bar;

[0035] an end of the handle extends through the first guide slot and is fixedly connected to the drive portion;

[0036] a limit part is fixed to the drive portion, the limit part extends through the second guide slot and is exposed out of the corresponding suspension bar, and the limit part is in sliding fit with the second guide slot to guide and limit a movement of the drive portion;

[0037] a fixed plate is arranged in each suspension bar, the elastic element is arranged between the drive portion and the fixed plate, and the elastic element acts on the drive portion to make the drive portion tend to drive the moving part to move towards the gear positions.

[0038] In one embodiment of the present disclosure, the moving parts are sleeved with wear-resistant pads, and the wear-resistant pads are in contact with inner walls of the base frame to fill in gaps between the power rack and the base frame.

[0039] In one embodiment of the present disclosure, the suspension members are made from a wear-resistant material.

[0040] In one embodiment of the present disclosure, the functional extension arm is fixedly connected to the base frame by means of first pins and second pins; and the first pins extend through the base frame in a left-right direction to fix the functional extension arm, and the second pins extend through holes in the base frame in a front-back direction to fix the functional extension arm.

[0041] Compared with the prior art, the present disclosure has the following beneficial effects: users may adjust the training angle merely by controlling locking and unlocking of the locking mechanisms by means of a single motion, such that operation is easy and fast, and the user experience of the machine is improved.BRIEF DESCRIPTION OF DRAWINGS

[0042] FIG. 1 is a schematic overall structural diagram of a Smith machine with an adjustable training angle.

[0043] FIG. 2 is a schematic structural diagram of FIG. 1 in a case where a mounting frame and a suspension assembly are removed.

[0044] FIG. 3 is a schematic structural diagram of a power rack with a tilt angle of the Smith machine in FIG. 2.

[0045] FIG. 4 is a schematic structural diagram of an angle adjustment assembly.

[0046] FIG. 5 is a schematic structural diagram of an angle adjustment assembly and a slideway.

[0047] FIG. 6 is a sectional view of the angle adjustment assembly and the slideway.

[0048] FIG. 7 is a schematic structural diagram of FIG. 1 in a case where the power rack is removed.

[0049] FIG. 8 is a schematic structural diagram of a functional extension arm.

[0050] FIG. 9 is a schematic structural diagram of an angle adjustment assembly according to Embodiment 3.

[0051] FIG. 10 is a sectional view of FIG. 9.

[0052] FIG. 11 is a perspective view of the inside of a suspension bar according to Embodiment 3.

[0053] FIG. 12 is an exploded view of FIG. 9.

[0054] FIG. 13 is an enlarged view of a base frame and a functional extension arm.

[0055] Reference signs: 1, base frame; 11, steel plate; 2, power rack; 21, upright rail; 22, suspension bar; 221, suspension hole; 222, suspension member; 23, Smith bar; 231, hook; 24, rotary connecting point; 25, connecting rod; 3, slideway; 31, gear position; 41, handle; 411, inner end of handle; 412, articulated shaft; 42, drive portion; 43, moving part; 44, elastic element; 45, link; 46, limit slot; 47, wear-resistant pad; 481, first guide slot; 482, second guide slot; 49, limit screw; 51, suspension assembly; 52, first traction assembly; 521, first pulley block; 522, first cable; 6, functional extension arm; 61, first pin; 62, second pin; 63, second traction assembly; 631, second pulley block; 632, second cable; 64, shackle; 7, mounting frame; 8, fixed plate; 9, hole.DESCRIPTION OF EMBODIMENTS

[0056] The technical solutions in the embodiments of the present application are clearly and completely described below in conjunction with accompanying drawings in the embodiments of the present application.

[0057] As shown in FIGS. 1-3, the present disclosure provides a Smith machine with an adjustable training angle. The Smith machine typically includes a base frame 1 and a power rack 2. The base frame 1 provides a stable support base for the entire machine, and is generally made from high-strength steel by welding. The power rack 2 is the core part used by users to perform barbell training, and includes upright rails 21, a Smith bar 23 slidably assembled on the upright rails 21, and suspension bars 22 used for suspending the Smith bar 23. Upper and lower ends of the upright rails 21 and the suspension bars 22 are fixedly connected by means of connecting rods 25 to form a rigid frame structure, thus ensuring that the upright rails 21 remain parallel to the suspension bars 22 during the movement process.

[0058] As shown in FIGS. 1 and 2, one end of the power rack 2 is rotatably connected to a bottom load-bearing region of the base frame 1 (e.g., steel plates 11 welded to the bottom of the base frame) by means of rotary connecting points 24 (where, the rotary connecting points 24 are existing rotary shafts), such that the entire power rack 2 is able to swing forward and backward around the rotary connecting points 24 within a specific angle range. Angle adjustment assemblies are arranged between the other end (the top) of the power rack 2 and the top of the base frame 1 and used for achieving and maintaining different tilt angles for training. In this embodiment, the angle adjustment assemblies are arranged at the tops of the suspension bars 22.

[0059] In conjunction with FIGS. 4-6, in an implementation mode, each angle adjustment assembly includes a slideway 3 arranged at the top of the base frame 1, a moving part 43 arranged at a top end of the power rack 2, and a locking mechanism, where the moving part 43 is slidably assembled in the slideway 3. When users push the power rack 2 to rotate around the rotary connecting points 24, the moving parts 43 slide along the slideways 3, and the sliding positions of the moving parts 43 directly correspond to the tilt angle of the power rack 2.

[0060] The top of the base frame 1 is provided with steel plates 11, which are parallelly arranged on left and right sides in a spaced manner. The top end of the power rack 2 is located between the two steel plates 11, and the slideways 3 are actually arranged on the steel plates 11.

[0061] The locking mechanism is configured to selectively lock the moving part 43 with respect to the base frame 1. In a preferred embodiment of the present disclosure, the slideway 3 extends in a front-back direction of the entire Smith machine, and a plurality of gear positions 31 are arranged on an inner wall of the slideway 3 in a spaced manner in a length direction of the slideway 3.

[0062] In an implementation mode of this embodiment, the gear positions 31 are grooves formed in front and rear ends of the slideway 3, and the grooves are open downward.

[0063] The locking mechanism includes a drive part, and the drive part is operable to drive the moving part 43 to move to selectively engage into or disengage from a specific gear position 31.

[0064] In an implementation mode, as shown in FIGS. 5 and 6, the drive part includes a handle 41 to be operated by users, a drive portion 42 connected to the moving part 43, and an elastic element 44 acting on the drive portion 42. Outer ends of the two handles 41 extend out of outer sides of the suspension bars 22 to be gripped by users, the two handles are arranged symmetrically and both located on inner sides of the base frame 1, inner ends 411 of the handles are located inside the suspension bars 22, and the handles 41 are rotatably fixed by means of articulated shafts 412. In this embodiment, the elastic element 44 is an existing spring, two ends of which hook a wall of the corresponding suspension bar 22 and the corresponding handle 41 by means of hooks, so as to drive the corresponding handle 41 to move upward. Under the action of the elastic element 44, the moving part 43 always tends to move towards the inner wall of the slideway 3 (i.e., towards the gear positions 31) to realize automatic locking.

[0065] The drive portion 42 and a link 45 are arranged between the handle 41 and the moving part 43, two ends of the link 45 are respectively articulated with the handle 41 and the drive portion 42, and the drive portion 42 is fixedly connected to the moving part 43 directly.

[0066] When a user needs to adjust the angle, the user simultaneously grips the two handles 41 with both hands and pulls the handles 41 downward to drive the drive portions 42 by means of the links 45 to overcome the acting force from the elastic elements 44, such that the moving parts 43 are pulled downward out of current gear positions 31. After the moving parts 43 are released from the current gear positions, the user can push the power rack 2 to a new angle, at this moment, the user releases the handles 41, and the moving parts 43 are driven by the elastic elements 44 to automatically engage into corresponding gear positions 31, such that the power rack 2 is locked at the current angle. Limit slots 46, extending in a length direction of the suspension bars 22, are formed in walls of the suspension bars 22 of the power rack 2, the limit slots 46 are kidney-shaped, the moving parts 43 extend through the limit slots 46, and the length of the limit slots 46 is greater than the diameter of the moving parts 43, such that the movement trajectory of the moving parts 43 may be limited by the limit slots 46 to ensure that the moving parts 43 are accurately aligned with and clamped into the gear positions 31.

[0067] The moving parts 43 are sleeved with wear-resistant pads 47, and the wear-resistant pads 47 are in contact with inner walls of the steel plates 11 of the base frame 1. The wear-resistant pads 47 are wear-resistant and can fill in gaps between the power rack 2 and the steel plates 11.

[0068] By means of the above design, the power rack 2 is rotatably adjustable to make the absolute value of a maximum adjustable angle of the moving direction of the Smith bar 23 with respect to the vertical surface not less than 0.5°, which can adapt to diversified requirements for the barbell trajectory of movements such as squat, bench press and deadlift. In an implementation mode of this embodiment, the two gear positions 31 respectively correspond to a tilt angle of 0° and a tilt angle of 7° of the power rack. In an implementation mode, the tilt angle of the power rack 2 may be −7°, or more gear positions 31 may be set to correspond to more tilt angles.

[0069] During the adjustment process, because the upright rails 21 are fixedly connected to the suspension bars 22, the upright rails 21 and the suspension bars 22 always rotate synchronously and remain parallel to each other. Such a parallel relationship ensures that the Smith bar 23 suspended on the suspension bars 22 remains stable regardless of the tilt angle at which the power rack 2 is set, and the hooks 231 will not disengage, thereby fundamentally guaranteeing the safety of training. Moreover, the precise sliding fit between the moving parts 43 and the slideways 3 provides reliable guiding and limiting effects, and further improves structural stability and safety. Users may complete the entire angle adjustment process merely by operating the handles, such that operation is easy and fast.

[0070] Considering the change of the force line under different tilt angles, as shown in FIG. 7, each suspension bar 22 is provided with a plurality of suspension holes 221 which are uniformly arranged in a spaced manner in the length direction of the suspension bar 22. Sides, facing the Smith bar 23, of the suspension holes 221 are open, and independent suspension members 222 (e.g., steel bushings) are inlaid in the suspension holes 221. By means of such a design, stress contact points are transferred from the bodies of the suspension bars 22 onto the more wear-resistant suspension members 222, such that the problem of continuous partial wear of the hole walls caused by the hooks 231 in the event of an angle change is effectively solved, the service life of the suspension bars 22 is greatly prolonged, and the convenience of maintenance of the suspension bars 22 is greatly improved.

[0071] To further expand the functions of the machine, as shown in FIGS. 1, 8 and 13, the base frame 1 further includes a mounting frame 7. The mounting frame 7 adopts the structure of an existing lat pull-down frame (such as a portal frame), and the mounting frame 7 is provided with a functional extension arm 6. The functional extension arm 6 matches the base frame 1 in shape and is mounted at a top end of a front side of the base frame 1. The functional extension arm 6 is fixedly connected to the base frame 1 by means of first pins 61 and second pins 62. The first pins 61 extend through the steel plates 11 in a left-right direction to fix the functional extension arm 6, and the second pins 62 extend through holes 9 in the mounting frame 7 in a front-back direction to fix the functional extension arm 6. A first traction assembly 52 (including a first pulley block 521 and a first cable 522) and a weight assembly connected to the first traction assembly 52 or a suspension assembly 51 for suspending weight plates are arranged on the base frame 1. In this embodiment, the suspension assembly 51 is used, and existing weight plates (not shown) may be suspended on a rod of the suspension assembly 51 to provide a load. In an implementation mode, the weight assembly may be weight plates used by existing fitness equipment, and different numbers of weight plates may be selected by means of pin positions to provide loads of different weights.

[0072] A second traction assembly 63 (including a second pulley block 631 and a second cable 632) is arranged on the functional extension arm 6. Shackles 64 at tail ends of the first cable 522 and the second cable 632 are detachably connected to ensure that the weight system of the Smith machine may be shared by the functional extension arm 6, such that users may perform pull training such as lat pull-down. When pull training is not needed, the functional extension arm 6 may be easily detached to restore the original compact form of the machine.

[0073] The first traction assembly 52 and the second traction assembly 63 each consist of a pulley block and a cable used by existing fitness equipment.

[0074] The operating process of the present disclosure is as follows: when a user needs to perform training at different angles, first, the user grips the handles 41 and pulls the handles 41 on the two sides outward to drive the moving parts 43 to disengage from the current gear positions 31 of the slideways 3, so as to release the power rack 2. Then, the user pushes the handles 41 along the slideways 3 according to a training movement (such as tilting forward for a deadlift, and tilting backward for a bench press) to drive the moving parts 43 to slide along the slideways 3 until the power rack 2 reaches a target tilt angle. Finally, the user releases the handles 41, and the moving parts 43 automatically engage into the corresponding gear positions 31 under the action of the elastic elements 44 to lock the power rack 2 at the target tilt angle. At this moment, the user may perform training safely and smoothly by means of the Smith machine at the set angle. If lat pull-down training is needed, the functional extension arm 6 is assembled, and the cables are connected, such that the Smith machine is switched to the pull training mode.

[0075] In an implementation mode, the specific structure of the locking mechanism in each angle adjustment assembly may be as follows: the locking mechanism is one or more threaded clamping assemblies. The moving part in the assembly consists of a threaded rod arranged horizontally and a knob in threaded fit with the threaded rod. In an implementation mode, the threaded rod is fixedly connected to the power rack 2, the threaded rod is horizontally arranged in the left-right direction and may be slidably adjusted along the slideway 3, an end of the threaded rod extends out of the slideway 3 in the left-right direction to be in threaded fit with the knob, and the power rack 2 is fixed by means of a horizontal clamping force generated when the knob is threadedly tightened, such that the power rack 2 is unlikely to move.

[0076] In an implementation mode, the specific structure of the locking mechanism in each angle adjustment assembly may be specifically as follows: as shown in FIGS. 9-12, the drive portion 42 in the locking mechanism is a square tube in the same shape as the corresponding suspension bar 22, and the suspension bar 22 is disposed around an outer side of the drive portion 42 and is in sliding fit with the drive portion 42; the handle 41 is fixed to the drive portion 42 and exposed out of the corresponding suspension bar 22; and a limit part is fixed to the side wall of the drive portion 42, the limit part is a limit screw 49, and the limit screw 49 is also exposed out of the corresponding suspension bar 22 and used for positioning the drive portion 42. A first guide slot 481 and a second guide slot 482, for the corresponding handle 41 and the corresponding limit screw 49 to extend out, are formed in each suspension bar 22, the first guide slot 481 and the second guide slot 482 both extend in the length direction of the suspension bar 22, and the first guide slot 481 and the second guide slot 482 guide and limit the movement of the corresponding handle 41 and the corresponding limit screw 49 respectively. A moving part 43 is arranged at the top of the drive portion 42. The moving part 43 in Embodiment 3 I identical in structure with the moving part in Embodiment 1.

[0077] An elastic element 44 is arranged at the bottom of the drive portion 42, and the elastic element 44 is an existing compression spring. A fixed plate 8 is welded in each suspension bar 22, a lower end of the elastic element 44 is supported on the fixed plate 8, and an upper end of the elastic element 44 abuts against the drive portion 42 and applies an elastic force for driving the drive portion 42 to move upward, such that the drive portion 42 will move upward to engage into the corresponding gear position 31 in a natural state.

[0078] A user may grip the handles 41 and pulls the handles 41 downward to drive the entire driving parts 43 to disengage from the corresponding gear positions 31 of the slideways 3, so as to release the power rack 2. Then, the user pushes the handles 41 along the slideways 3 according to a training movement (such as tilting forward for a deadlift, and tilting backward for a bench press) to drive the moving parts 43 to slide along the slideways 3 until the power rack 2 reaches a target tilt angle. Finally, the user releases the handles 41, and the moving parts 43 automatically engage into the corresponding gear positions 31 under the action of the elastic elements 44 to lock the power rack 2 at the target tilt angle.

Claims

1. A Smith machine with an adjustable training angle, comprising a base frame and a power rack arranged on the base frame, the power rack comprising upright rails, a Smith bar slidably assembled on the upright rails, and suspension bars for suspending the Smith bar, and the upright rails being fixedly connected to the suspension bars;wherein one end of the power rack is rotatably connected to the base frame, such that the power rack is able to rotate around rotary connecting points and form different training angles; angle adjustment assemblies are arranged between the other end of the power rack and the base frame; and each said angle adjustment assembly comprises:a slideway, formed on the base frame;a moving part, arranged on the power rack and being slidable along the slideway; anda locking mechanism, configured to selectively lock the moving part with respect to the base frame to fix the power rack at a current training angle.

2. The Smith machine with an adjustable training angle according to claim 1, wherein at least two gear positions are arranged on an inner wall of the slideway in a spaced manner in a length direction of the slideway; the locking mechanism comprises a drive part, the drive part is operable to drive the moving part to move; and when the moving part moves into one said gear position, a training angle of the power rack is locked.

3. The Smith machine with an adjustable training angle according to claim 2, wherein the drive part comprises:a handle, operated by a user;a drive portion, connected between the handle and the moving part; andan elastic element, directly or indirectly acting on the moving part to make the moving part tend to move towards the gear positions;wherein the handle is operated by the user to drive the drive portion to overcome an acting force from the elastic element, so as to allow the moving part to move out of the gear position.

4. The Smith machine with an adjustable training angle according to claim 3, wherein the handle is articulated to the power rack and is connected to the drive portion by means of a link, and two ends of the link are articulated to the handle and the drive portion, respectively.

5. The Smith machine with an adjustable training angle according to claim 3, wherein limit slots are formed in the power rack, the moving parts extend through the limit slots and are movably arranged in the limit slots, and the limit slots limit movement trajectories of the moving parts.

6. The Smith machine with an adjustable training angle according to claim 3, wherein the handles are symmetrically arranged on two opposite sides of the base frame.

7. The Smith machine with an adjustable training angle according to claim 1, wherein the rotary connecting points of the power rack are arranged in a bottom load-bearing region of the base frame, and the angle adjustment assemblies are arranged in a top region of the base frame.

8. The Smith machine with an adjustable training angle according to claim 1, wherein the power rack is rotatably adjustable to make an absolute value of a maximum adjustable angle of a moving direction of the Smith bar with respect to a vertical surface not less than 0.5°.

9. The Smith machine with an adjustable training angle according to claim 1, wherein each said suspension bar is provided with a plurality of suspension holes which are uniformly arranged in a spaced manner in a length direction of the suspension bar; sides, facing the Smith bar, of the suspension holes are open; and suspension members, to which hooks of the Smith bar are hooked, are arranged in the suspension holes.

10. The Smith machine with an adjustable training angle according to claim 1, wherein the base frame is provided with a functional extension arm, the functional extension arm is detachably fixed to the base frame and extends outward, a first traction assembly and a weight assembly connected to the first traction assembly or a suspension assembly used for suspending weight plates are arranged on the base frame, a second traction assembly is arranged on the functional extension arm, and the first traction assembly and the second traction assembly are detachably and fixedly connected.

11. The Smith machine with an adjustable training angle according to claim 5, wherein the drive portion is a rod structure extending in a length direction of the corresponding suspension bar and located inside the corresponding suspension bar;a bar body of each said suspension bar is provided with a first guide slot and a second guide slot, which extend in a length direction of the suspension bar;an end of the handle extends through the first guide slot and is fixedly connected to the drive portion;a limit part is fixed to the drive portion, the limit part extends through the second guide slot and is exposed out of the corresponding suspension bar, and the limit part is in sliding fit with the second guide slot to guide and limit a movement of the drive portion;a fixed plate is arranged in each said suspension bar, the elastic element is arranged between the drive portion and the fixed plate, and the elastic element acts on the drive portion to make the drive portion tend to drive the moving part to move towards the gear positions.

12. The Smith machine with an adjustable training angle according to claim 3, wherein the moving parts are sleeved with wear-resistant pads, and the wear-resistant pads are in contact with inner walls of the base frame to fill in gaps between the power rack and the base frame.

13. The Smith machine with an adjustable training angle according to claim 9, wherein the suspension members are made from a wear-resistant material.

14. The Smith machine with an adjustable training angle according to claim 10, wherein the functional extension arm is fixedly connected to the base frame by means of first pins and second pins; and the first pins extend through the base frame in a left-right direction to fix the functional extension arm, and the second pins extend through holes in the base frame in a front-back direction to fix the functional extension arm.

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